WO2013031610A1 - Liquid-crystal display device and method for driving liquid-crystal panel - Google Patents
Liquid-crystal display device and method for driving liquid-crystal panel Download PDFInfo
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- WO2013031610A1 WO2013031610A1 PCT/JP2012/071236 JP2012071236W WO2013031610A1 WO 2013031610 A1 WO2013031610 A1 WO 2013031610A1 JP 2012071236 W JP2012071236 W JP 2012071236W WO 2013031610 A1 WO2013031610 A1 WO 2013031610A1
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- 239000003086 colorant Substances 0.000 claims abstract 12
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
Definitions
- the present invention relates to a driving technique for a liquid crystal panel.
- Patent Document 1 the polarity of a data signal supplied to one subpixel of a liquid crystal panel is inverted every frame, and the ⁇ characteristic of the subpixel is periodically switched to improve the viewing angle characteristic of the liquid crystal display device. Techniques for making them disclosed are disclosed.
- the inventors notice that flicker is noticeable when a liquid crystal panel having four or more (for example, red, blue, green, and yellow) subpixels per pixel is driven to periodically switch the ⁇ characteristics of one subpixel. It was found that there is a case (for example, a case as shown in FIG. 15).
- One of the objects of the present invention is to suppress such flicker.
- the present liquid crystal display device is a liquid crystal display device that inverts the polarity of a data signal supplied to one subpixel every n frames (n is a natural number) and periodically switches the ⁇ characteristic of the subpixel.
- 1 to 4 sub-pixels, and the first to fourth sub-pixels are first to fourth colors, respectively.
- the first color has higher visibility than the third and fourth colors
- the second color is The visibility is higher than that of the third and fourth colors
- the first and second subpixels have the same ⁇ -characteristic switching pattern.
- the polarity of the data signal supplied to the first subpixel and the second subpixel The polarity of the data signal supplied to is different.
- FIG. 6 is a schematic diagram illustrating a display state of the liquid crystal display device of Example 1.
- FIG. It is a block diagram which shows the structure of the liquid crystal display device of FIG. It is a graph which shows the specific luminous sensitivity according to color.
- 4 is a graph showing two types of ⁇ characteristics ( ⁇ 1 ⁇ ⁇ 2) for each of four colors (4 pixels).
- FIG. 2 is a circuit diagram illustrating a configuration around a pixel of the liquid crystal display device of FIG. 1.
- FIG. 6 is a schematic diagram illustrating a modified example of the first embodiment. 6 is a schematic diagram showing a display state of a liquid crystal display device of Example 2.
- FIG. 6 is a schematic diagram illustrating a display state of a liquid crystal display device of Example 3.
- FIG. 10 is a schematic diagram illustrating a display state of the liquid crystal display device of Example 4.
- FIG. 10 is a schematic diagram illustrating a display state of a liquid crystal display device of Example 5.
- FIG. 10 is a schematic diagram illustrating another modification of the fifth embodiment.
- FIG. 10 is a schematic diagram illustrating still another modification example of the fifth embodiment.
- FIG. 10 is a schematic diagram showing a display state of a liquid crystal display device of Example 6.
- FIG. 10 is a schematic diagram showing a display state of a liquid crystal display device of Example 7. It is a schematic diagram which shows the reference example of the display state of a liquid crystal display device.
- the present liquid crystal display device LCD includes a liquid crystal panel LCP including data signal lines, scanning signal lines, transistors and subpixel electrodes, a backlight BL for irradiating light to the liquid crystal panel LCP, and scanning signal lines.
- a gate driver GD for driving the data driver
- a source driver SD for driving the data signal line
- a display control board DCS for controlling the gate driver and the source driver.
- the liquid crystal panel LCP is a so-called four-color panel including four color sub-pixels (SP) of red (R), green (G), blue (B), and yellow (Y).
- SP color sub-pixels
- a red (R) sub-pixel, a green (G) sub-pixel, a blue (B) sub-pixel, and a yellow (Y) sub-pixel arranged in this order in the stretching direction) constitute one pixel (pixel).
- the relative luminous sensitivities of the four colors are yellow (Y)> green (G)> red (R)> blue (B), and yellow and green luminance changes are relatively visible. It is easy to perceive, and the luminance changes of red and blue are relatively difficult to perceive.
- the display control board DCS includes a timing controller Tcon and a video processing circuit IPC.
- the timing controller Tcon generates display data, a source control signal, and a gate control signal from the video data IDA in cooperation with the video processing circuit IPC, outputs the display data and the source control signal to the source driver SD, and performs gate control.
- the signal is output to the gate driver GD.
- the video processing circuit IPC to which the video data IDA is input includes the gamma table GTa corresponding to the first gamma characteristic ⁇ 1 in FIG. 4 and the second gamma characteristic ⁇ 2 in FIG. 4 (in the same gradation of the same color, the luminance of ⁇ 1 ⁇ ⁇ 2 And a gamma table GTb corresponding to the subpixel color in which the input gradation is written, the position in the panel, and the frame order.
- a plurality of output gradations are generated from one input gradation by selectively using GTa or the gamma table GTb.
- the timing controller Tcon generates a polarity inversion signal as one of the source control signals
- the source driver SD receives the polarity inversion signal and receives a data signal (analog signal) that inverts the polarity for each frame in one subpixel. ) Is written.
- One frame period is 1/120 [second] or less, preferably 1/480 [second].
- Example 1 In the first embodiment, 16 subpixels included in four pixels arranged in two rows and two columns on a liquid crystal panel are displayed in four consecutive frames (frames F1 to F4 having one cycle) as shown in FIG. Setting of ⁇ characteristics (setting of ⁇ 1 and ⁇ 2) and setting of polarity of data signal (setting of positive polarity and negative polarity) are performed.
- the four pixels are located at the upper left, the first pixel consisting of R1, G1, B1, Y1, the upper right, the second pixel consisting of R2, G2, B2, Y2, and the lower left, R3 A third pixel composed of G3, B3, and Y3 and a fourth pixel that is located on the lower right and is composed of R4, G4, B4, and Y4. Further, one cycle corresponds to one input gradation, and the switching pattern of the ⁇ characteristic is that the first and fourth pixels have a frame F1 of ⁇ 1 (bright) ⁇ frame F2 has a ⁇ 1 (bright) ⁇ frame F3.
- ⁇ 2 (dark) ⁇ frame F3 is ⁇ 2 (dark), and the second and third pixels are frame F1 is ⁇ 2 (dark) ⁇ frame F2 is ⁇ 2 (dark) ⁇ frame F3 is ⁇ 1 (light) ⁇ frame F4 is ⁇ 1 (bright).
- frame 1 (set to ⁇ 1 and positive polarity)
- frame 2 (set to ⁇ 1 and negative polarity)
- frame 3 (set to ⁇ 2 and positive polarity)
- Frame 4 (gamma 2 and set to negative polarity).
- the green sub-pixel G1 of the first pixel For the green sub-pixel G1 of the first pixel, frame 1 (gamma 1 and set to positive polarity) ⁇ frame 2 (gamma 1 and set to negative polarity) ⁇ frame 3 ( ⁇ 2 and positive polarity) ⁇ frame 4 ( ⁇ 2 and negative polarity), and the green sub-pixel G1 of the first pixel is frame 1 ( ⁇ 1 and negative polarity) ⁇ frame 2 ( ⁇ 1 and positive polarity) To frame 3 (set to ⁇ 2 and negative polarity) ⁇ frame 4 (set to ⁇ 2 and positive polarity), the first pixel For yellow subpixel Y1, frame 1 (gamma 1 and set to negative polarity) ⁇ frame 2 (gamma 1 and set to positive polarity) ⁇ frame 3 (gamma 2 and set to negative polarity) ⁇ frame 4 (gamma 2 and set to positive polarity) It is.
- frame Y2 frame 1 (set to ⁇ 2 and positive polarity) ⁇ frame 2 (set to ⁇ 2 and negative polar
- the yellow sub-pixel of the third pixel For frame Y3, frame 1 (set to ⁇ 2 and positive polarity) ⁇ frame 2 (set to ⁇ 2 and negative polarity)
- frame Y4 frame 1 (set to ⁇ 1 and negative polarity) ⁇ frame 2 (set to ⁇ 1 and positive
- the data signal supplied to the green subpixel G1 can be obtained by adopting a method of making the polarity different from the polarity of the data signal supplied to the yellow subpixel Y1.
- the polarity of the data signal of the yellow subpixel Y1 and the polarity of the data signal of the blue subpixel B1 are the same.
- the polarity of the data signal of the green sub-pixel G1 and the polarity of the data signal of the red sub-pixel R1 can be made to be more effective in suppressing flicker.
- the visual sensitivity depends on the visual environment and the set wavelength of each color. For example, when the visual sensitivity is green> yellow> red> blue, as shown in FIG. 6, data of the green subpixel G1 is used.
- the polarity of the signal and the polarity of the data signal of the blue subpixel B1 are same polarity, the polarity of the data signal of the yellow subpixel Y1 and the polarity of the data signal of the red subpixel R1 are further increased. Flicker can be effectively suppressed.
- liquid crystal display device LCD high speed driving is preferable.
- two data signal lines (SL ⁇ sL) are provided in one pixel column, and two scanning signal lines (GL1 ⁇ GL3) are simultaneously selected.
- SL ⁇ sL data signal lines
- GL1 ⁇ GL3 scanning signal lines
- a total of four data signal lines, two corresponding to the upper half of the panel and two corresponding to the lower half, may be provided in one pixel column, and the panel may be divided up and down (4 ⁇ speed driving is possible).
- the switching pattern of ⁇ is set to be the same for the four subpixels belonging to one pixel, and the polarity of the data signal is set to be canceled in these four subpixels.
- the present invention is not limited to this.
- the switching pattern of ⁇ for the first pixel R1, the second pixel G2, B2, Y2, and the third pixel G3, B3, Y3 is the first pattern ( ⁇ 1 ⁇ ⁇ 1 ⁇ ⁇ 2 ⁇ ⁇ 2).
- the switching pattern of ⁇ for the first pixel G1, B1, Y1, the second pixel R2 and the third pixel R3 as a second pattern ( ⁇ 2 ⁇ ⁇ 2 ⁇ ⁇ 1 ⁇ ⁇ 1), It is also possible to balance the characteristics (to cancel light and dark).
- the first pixel G1 and the second pixel are set to the first polarity with respect to the first pixel R1, B1, Y1, the second pixel G2, and the third pixel G3.
- R2 ⁇ B2 ⁇ Y2 of the third pixel and R3 ⁇ B3 ⁇ Y3 of the third pixel the polarity of the data signal is set to the second polarity, and the polarity of the data signal is balanced in units of two adjacent pixels. It is also possible to plan.
- Example 3 In the present liquid crystal display device, the setting of ⁇ of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the arrangement order of these four subpixels is changed, as shown in FIG. As described above, it is also possible to make the G subpixel and the Y subpixel adjacent in the row direction within one pixel.
- Example 4 In the present liquid crystal display device, the arrangement order of the four sub-pixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the setting of ⁇ of these four sub-pixels is changed as shown in FIG. It is also possible to configure.
- the switching pattern of ⁇ is set to the first pattern ( ⁇ 1 ⁇ ⁇ 1 ⁇ ⁇ 2 ⁇ ⁇ 2) for G1 ⁇ Y1 of the first pixel, G2 ⁇ Y2 of the second pixel, and R3 ⁇ B3 of the third pixel.
- the switching pattern of ⁇ is the second pattern ( ⁇ 2 ⁇ ⁇ 2 ⁇ ⁇ 1 ⁇ ⁇ 1), and the balance of the polarity of the data signal in units of one pixel It is also possible to place checkered arrangement of light ( ⁇ 1) and dark ( ⁇ 2) while balancing the ⁇ characteristics (while canceling light and dark).
- Example 5 In the present liquid crystal display device, the setting of ⁇ of four subpixels included in one pixel is the same as that in FIG. 1, and the arrangement of these four subpixels is changed from a stripe arrangement to a matrix arrangement (2 rows and 2 columns arrangement). It is also possible to configure as shown in FIG. In FIG. 10, it is possible to invert the polarity of the data signal in dot units while balancing the polarity of the data signal and the ⁇ characteristics (while canceling light and dark).
- the setting of ⁇ of the four subpixels included in one pixel is the same as that in FIG. 9, but the arrangement of these four subpixels is changed from a stripe arrangement to a matrix arrangement (2 rows ⁇ 2 columns arrangement). It is also possible to configure as shown in FIG.
- the G sub-pixel and the Y sub-pixel are performed within one pixel while balancing the polarity of the data signal and the gamma characteristic in units of one pixel (while canceling light and dark). Adjacent to the direction, the polarity of the data signal can be inverted.
- Example 6 In the present liquid crystal display device, the setting of ⁇ of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. It is also possible to configure as shown in FIG. In this case, for example, the sum of the luminances of the bright region (upper side) of Y1 and the dark region (lower side) of Y1 matches ⁇ 1, and the bright region (upper side) of Y2 and the dark region (lower side) of Y2 The total sum of luminance matches ⁇ 2. Thus, by forming regions having different ⁇ characteristics in the subpixels, the viewing angle characteristics can be further enhanced.
- Example 7 In the present liquid crystal display device, the arrangement order of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the switching pattern of ⁇ of these four subpixels is increased (four patterns and It is also possible to configure as shown in FIG. In this case, the switching pattern of the ⁇ characteristics is such that the first pixel is ⁇ 1 (bright) in the frame F1, ⁇ 1 (bright) in the frame F2, ⁇ 2 (dark) in the frame F3, and ⁇ 2 (dark) in the frame F3.
- the fourth pixel is ⁇ 2 (dark), the frame F2 is ⁇ 2 (dark), the frame F3 is ⁇ 1 (bright), the frame F4 is ⁇ 1 (bright), and the second pixel is the frame F1.
- ⁇ 2 (dark) ⁇ frame F2 is ⁇ 1 (bright) ⁇ frame F3 is ⁇ 1 (bright) ⁇ frame F3 is ⁇ 2 (dark)
- the third pixel is frame F1 is ⁇ 1 (bright) ⁇ frame F2 is ⁇ 2 (Dark) ⁇ frame F3 is ⁇ 2 (dark) ⁇ frame F4 is ⁇ 1 (bright).
- the present liquid crystal display device is a liquid crystal display device that inverts the polarity of a data signal supplied to one subpixel every n frames (n is a natural number) and periodically switches the ⁇ characteristic of the subpixel.
- 1 to 4 sub-pixels, and the first to fourth sub-pixels are first to fourth colors, respectively.
- the first color has higher visibility than the third and fourth colors
- the second color is The visibility is higher than that of the third and fourth colors
- the first and second subpixels have the same ⁇ -characteristic switching pattern.
- the polarity of the data signal supplied to the first subpixel and the second subpixel The polarity of the data signal supplied to is different.
- the third and fourth subpixels have the same switching pattern of ⁇ characteristics, and in the same frame, the polarity of the data signal supplied to the third subpixel and the data signal supplied to the fourth subpixel are the same. It can also be set as the structure from which polarity differs.
- the first and second subpixels may belong to the same pixel.
- the third and fourth colors may be red and blue, respectively.
- the first to fourth sub-pixels have the same ⁇ characteristic switching pattern, the first color has higher visibility than the second color, and the third color has higher visibility than the fourth color.
- the polarity of the data signal supplied to the first subpixel is the same as the polarity of the data signal supplied to the fourth subpixel, and the polarity of the data signal supplied to the second subpixel.
- the polarity of the data signal supplied to the third subpixel may be the same.
- the liquid crystal display device includes fifth and sixth subpixels having different ⁇ -characteristic switching patterns from the first and second subpixels, and the fifth and sixth subpixels have first and second colors, respectively. You can also
- the polarity of the data signal supplied to the fifth subpixel and the polarity of the data signal supplied to the sixth subpixel may be different in the same frame.
- the ⁇ characteristic of each of the first to fourth subpixels can be switched every m frames.
- liquid crystal display device it may be configured such that n ⁇ m.
- the first and second colors may be yellow and green, respectively.
- one frame period may be less than 1/240 [second].
- each of the first to fourth sub-pixels includes a plurality of pixel electrodes, and a different effective voltage is applied to one of these pixel electrodes and another one during halftone display. You can also.
- the ⁇ characteristics of the first to fourth subpixels are switched between the first and second characteristics every m frames, and the first to fourth subpixels have the first characteristic at the same gradation.
- a configuration in which luminance ⁇ luminance of the second characteristic may be employed.
- the second subpixel when the first subpixel has the first characteristic, the second subpixel also has the first characteristic, and when the first subpixel has the second characteristic, the second subpixel also has the second characteristic. It can also be set as the characteristic.
- the liquid crystal panel driving method is a liquid crystal panel driving method in which the polarity of a data signal supplied to one subpixel is inverted every n frames (n is a natural number) and the ⁇ characteristic of the subpixel is periodically switched.
- the first to fourth subpixels are first to fourth colors, respectively, and the first color has higher visibility than the third and fourth colors, and the second color The colors have higher visibility than the third and fourth colors, the first and second subpixels have the same ⁇ -characteristic switching pattern, and in the same frame, the polarity of the data signal supplied to the first subpixel and the second The polarity of the data signal supplied to the sub-pixel is different.
- the present invention is not limited to the above-described embodiments, and those obtained by appropriately modifying the above-described embodiments based on common general technical knowledge and those obtained by combining them are also included in the embodiments of the present invention.
- the present invention is suitable for a liquid crystal TV and a liquid crystal display.
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Abstract
A liquid-crystal display device that cyclically switches the gamma characteristics of subpixels, wherein first through fourth subpixels are first through fourth colors, respectively; the luminosity function is higher for the first and second colors than for the third and fourth colors; the pattern according to which the gamma characteristics of the first subpixels are switched and the pattern according to which the gamma characteristics of the second subpixels are switched are identical; and within a given frame, the polarity of the data signal supplied to the first subpixels and the polarity of the data signal supplied to the second subpixels are different. This configuration makes it possible to ameliorate flicker in this liquid-crystal display device.
Description
本発明は、液晶パネルの駆動技術に関する。
The present invention relates to a driving technique for a liquid crystal panel.
特許文献1には、液晶パネルの1つのサブピクセルに供給するデータ信号の極性を1フレームごとに反転させるとともに、このサブピクセルのγ特性を周期的に切り替え、液晶表示装置の視野角特性を改善させる技術が開示されている。
In Patent Document 1, the polarity of a data signal supplied to one subpixel of a liquid crystal panel is inverted every frame, and the γ characteristic of the subpixel is periodically switched to improve the viewing angle characteristic of the liquid crystal display device. Techniques for making them disclosed are disclosed.
また近年では、1ピクセルに4色以上(例えば、赤・青・緑・黄)のサブピクセルを設けて表示品位を高める技術も一般化しつつある。
In recent years, a technique for improving display quality by providing subpixels of four or more colors (for example, red, blue, green, yellow) in one pixel is becoming common.
発明者らは、1ピクセルに4色以上(例えば、赤・青・緑・黄)のサブピクセルを有する液晶パネルで1つのサブピクセルのγ特性を周期的に切り替える駆動を行うと、フリッカが目立つ場合(例えば、図15のような場合)があることを見出した。本発明の目的の1つは、このようなフリッカを抑制することである。
The inventors notice that flicker is noticeable when a liquid crystal panel having four or more (for example, red, blue, green, and yellow) subpixels per pixel is driven to periodically switch the γ characteristics of one subpixel. It was found that there is a case (for example, a case as shown in FIG. 15). One of the objects of the present invention is to suppress such flicker.
本液晶表示装置は、1つのサブピクセルに供給するデータ信号の極性をnフレーム(nは自然数)ごとに反転させるとともに、このサブピクセルのγ特性を周期的に切り替える液晶表示装置であって、第1~第4サブピクセルを含み、第1~第4サブピクセルはそれぞれ第1~第4色であり、第1色は、第3および第4色よりも視感度が高く、第2色は、第3および第4色よりも視感度が高く、第1および第2サブピクセルはγ特性の切り替わりパターンが等しく、同一フレームでは、第1サブピクセルに供給されるデータ信号の極性と第2サブピクセルに供給されるデータ信号の極性とが異なることを特徴とする。
The present liquid crystal display device is a liquid crystal display device that inverts the polarity of a data signal supplied to one subpixel every n frames (n is a natural number) and periodically switches the γ characteristic of the subpixel. 1 to 4 sub-pixels, and the first to fourth sub-pixels are first to fourth colors, respectively. The first color has higher visibility than the third and fourth colors, and the second color is The visibility is higher than that of the third and fourth colors, and the first and second subpixels have the same γ-characteristic switching pattern. In the same frame, the polarity of the data signal supplied to the first subpixel and the second subpixel The polarity of the data signal supplied to is different.
上記構成によれば、相対的に視感度が高い第1および第2サブピクセルについて、第1サブピクセルに極性反転に伴う輝度変化が生じても、これが、第2サブピクセルの極性反転に生じる輝度変化(第1サブピクセルの輝度変化と逆向き)によって抑制され、フリッカを低減することができる。
According to the above configuration, for the first and second subpixels having relatively high visibility, even if the luminance change caused by the polarity inversion occurs in the first subpixel, this is the luminance generated in the polarity inversion of the second subpixel. It is suppressed by the change (opposite to the luminance change of the first sub-pixel), and flicker can be reduced.
本発明によれば、フリッカを抑制することができる。
According to the present invention, flicker can be suppressed.
図2に示すように、本液晶表示装置LCDは、データ信号線、走査信号線、トランジスタおよびサブピクセル電極を含む液晶パネルLCPと、液晶パネルLCPに光を照射するバックライトBLと、走査信号線を駆動するゲートドライバGDと、データ信号線を駆動するソースドライバSDと、ゲートドライバおよびソースドライバを制御する表示制御基板DCS(タイミングコントローラ基板)とを備える。
As shown in FIG. 2, the present liquid crystal display device LCD includes a liquid crystal panel LCP including data signal lines, scanning signal lines, transistors and subpixel electrodes, a backlight BL for irradiating light to the liquid crystal panel LCP, and scanning signal lines. A gate driver GD for driving the data driver, a source driver SD for driving the data signal line, and a display control board DCS (timing controller board) for controlling the gate driver and the source driver.
液晶パネルLCPは、赤(R)、緑(G)、青(B)、および黄色(Y)の4色のサブピクセル(SP)を含むいわゆる4色パネルであり、行方向(走査信号線の延伸方向)にこの順に並ぶ、赤(R)サブピクセル、緑(G)サブピクセル、青(B)サブピクセル、および黄(Y)サブピクセルによって1つのピクセル(画素)が構成されている。4色の比視感度は、図3に示すように、黄(Y)>緑(G)>赤(R)>青(B)となっており、黄色および緑の輝度変化は相対的に視感され易く、赤および青の輝度変化は相対的に視感され難い。
The liquid crystal panel LCP is a so-called four-color panel including four color sub-pixels (SP) of red (R), green (G), blue (B), and yellow (Y). A red (R) sub-pixel, a green (G) sub-pixel, a blue (B) sub-pixel, and a yellow (Y) sub-pixel arranged in this order in the stretching direction) constitute one pixel (pixel). As shown in FIG. 3, the relative luminous sensitivities of the four colors are yellow (Y)> green (G)> red (R)> blue (B), and yellow and green luminance changes are relatively visible. It is easy to perceive, and the luminance changes of red and blue are relatively difficult to perceive.
表示制御基板DCSは、タイミングコントローラTconおよび映像処理回路IPCを含む。タイミングコントローラTconは、映像処理回路IPCと協働して映像データIDAから、表示データ、ソース制御信号、およびゲート制御信号を生成し、表示データおよびソース制御信号をソースドライバSDに出力し、ゲート制御信号をゲートドライバGDに出力する。
The display control board DCS includes a timing controller Tcon and a video processing circuit IPC. The timing controller Tcon generates display data, a source control signal, and a gate control signal from the video data IDA in cooperation with the video processing circuit IPC, outputs the display data and the source control signal to the source driver SD, and performs gate control. The signal is output to the gate driver GD.
映像データIDAが入力される映像処理回路IPCは、図4の第1ガンマ特性γ1に対応するガンマテーブルGTaと、図4の第2ガンマ特性γ2(同色の同一階調では、γ1の輝度≧γ2の輝度)に対応するガンマテーブルGTbとを含み、映像データIDAから入力階調を算出するとともに、この入力階調が書き込まれるサブピクセルの色およびパネル内の位置とフレーム順序とに応じてガンマテーブルGTaまたはガンマテーブルGTbを選択的に利用し、1つの入力階調から複数の出力階調を生成する。
The video processing circuit IPC to which the video data IDA is input includes the gamma table GTa corresponding to the first gamma characteristic γ1 in FIG. 4 and the second gamma characteristic γ2 in FIG. 4 (in the same gradation of the same color, the luminance of γ1 ≧ γ2 And a gamma table GTb corresponding to the subpixel color in which the input gradation is written, the position in the panel, and the frame order. A plurality of output gradations are generated from one input gradation by selectively using GTa or the gamma table GTb.
また、タイミングコントローラTconは、ソース制御信号の1つとして極性反転信号を生成し、ソースドライバSDは、極性反転信号を受けて、1つのサブピクセルにフレームごとに極性が反転するデータ信号(アナログ信号)を書き込む。なお、1フレーム期間は、1/120〔秒〕以下、好ましくは1/480〔秒〕とする。
In addition, the timing controller Tcon generates a polarity inversion signal as one of the source control signals, and the source driver SD receives the polarity inversion signal and receives a data signal (analog signal) that inverts the polarity for each frame in one subpixel. ) Is written. One frame period is 1/120 [second] or less, preferably 1/480 [second].
〔実施例1〕
実施例1では、液晶パネルに2行2列配置された4つのピクセルに含まれる16個のサブピクセルについて、連続する4フレーム(1周期となるフレームF1~フレームF4)で、図1のようにγ特性の設定(γ1・γ2の設定)およびデータ信号の極性の設定(プラス極性・マイナス極性の設定)を行っている。 [Example 1]
In the first embodiment, 16 subpixels included in four pixels arranged in two rows and two columns on a liquid crystal panel are displayed in four consecutive frames (frames F1 to F4 having one cycle) as shown in FIG. Setting of γ characteristics (setting of γ1 and γ2) and setting of polarity of data signal (setting of positive polarity and negative polarity) are performed.
実施例1では、液晶パネルに2行2列配置された4つのピクセルに含まれる16個のサブピクセルについて、連続する4フレーム(1周期となるフレームF1~フレームF4)で、図1のようにγ特性の設定(γ1・γ2の設定)およびデータ信号の極性の設定(プラス極性・マイナス極性の設定)を行っている。 [Example 1]
In the first embodiment, 16 subpixels included in four pixels arranged in two rows and two columns on a liquid crystal panel are displayed in four consecutive frames (frames F1 to F4 having one cycle) as shown in FIG. Setting of γ characteristics (setting of γ1 and γ2) and setting of polarity of data signal (setting of positive polarity and negative polarity) are performed.
なお、4つのピクセルとは、左上に位置し、R1・G1・B1・Y1からなる第1ピクセル、右上に位置し、R2・G2・B2・Y2からなる第2ピクセル、左下に位置し、R3・G3・B3・Y3からなる第3ピクセル、および右下に位置し、R4・G4・B4・Y4からなる第4ピクセルである。また、1周期は1つの入力階調に対応しており、γ特性の切り替わりパターンは、第1および第4ピクセルが、フレームF1がγ1(明)→フレームF2がγ1(明)→フレームF3がγ2(暗)→フレームF3がγ2(暗)となっており、第2および第3ピクセルが、フレームF1がγ2(暗)→フレームF2がγ2(暗)→フレームF3がγ1(明)→フレームF4がγ1(明)となっている。
The four pixels are located at the upper left, the first pixel consisting of R1, G1, B1, Y1, the upper right, the second pixel consisting of R2, G2, B2, Y2, and the lower left, R3 A third pixel composed of G3, B3, and Y3 and a fourth pixel that is located on the lower right and is composed of R4, G4, B4, and Y4. Further, one cycle corresponds to one input gradation, and the switching pattern of the γ characteristic is that the first and fourth pixels have a frame F1 of γ1 (bright) → frame F2 has a γ1 (bright) → frame F3. γ2 (dark) → frame F3 is γ2 (dark), and the second and third pixels are frame F1 is γ2 (dark) → frame F2 is γ2 (dark) → frame F3 is γ1 (light) → frame F4 is γ1 (bright).
図1に示すように、第1ピクセルの赤サブピクセルR1については、フレーム1(γ1かつプラス極性に設定)→フレーム2(γ1かつマイナス極性に設定)→フレーム3(γ2かつプラス極性に設定)→フレーム4(γ2かつマイナス極性に設定)であり、第1ピクセルの緑サブピクセルG1については、フレーム1(γ1かつプラス極性に設定)→フレーム2(γ1かつマイナス極性に設定)→フレーム3(γ2かつプラス極性に設定)→フレーム4(γ2かつマイナス極性に設定)であり、第1ピクセルの緑サブピクセルG1については、フレーム1(γ1かつマイナス極性に設定)→フレーム2(γ1かつプラス極性に設定)→フレーム3(γ2かつマイナス極性に設定)→フレーム4(γ2かつプラス極性に設定)であり、第1ピクセルの黄サブピクセルY1については、フレーム1(γ1かつマイナス極性に設定)→フレーム2(γ1かつプラス極性に設定)→フレーム3(γ2かつマイナス極性に設定)→フレーム4(γ2かつプラス極性に設定)である。
As shown in FIG. 1, for the red sub-pixel R1 of the first pixel, frame 1 (set to γ1 and positive polarity) → frame 2 (set to γ1 and negative polarity) → frame 3 (set to γ2 and positive polarity) → Frame 4 (gamma 2 and set to negative polarity). For the green sub-pixel G1 of the first pixel, frame 1 (gamma 1 and set to positive polarity) → frame 2 (gamma 1 and set to negative polarity) → frame 3 ( γ2 and positive polarity) → frame 4 (γ2 and negative polarity), and the green sub-pixel G1 of the first pixel is frame 1 (γ1 and negative polarity) → frame 2 (γ1 and positive polarity) To frame 3 (set to γ2 and negative polarity) → frame 4 (set to γ2 and positive polarity), the first pixel For yellow subpixel Y1, frame 1 (gamma 1 and set to negative polarity) → frame 2 (gamma 1 and set to positive polarity) → frame 3 (gamma 2 and set to negative polarity) → frame 4 (gamma 2 and set to positive polarity) It is.
また、第2ピクセルの赤サブピクセルR2については、フレーム1(γ2かつマイナス極性に設定)→フレーム2(γ2かつプラス極性に設定)→フレーム3(γ1かつマイナス極性に設定)→フレーム4(γ1かつプラス極性に設定)であり、第2ピクセルの緑サブピクセルG2については、フレーム1(γ2かつマイナス極性に設定)→フレーム2(γ2かつプラス極性に設定)→フレーム3(γ1かつマイナス極性に設定)→フレーム4(γ1かつプラス極性に設定)であり、第2ピクセルの青サブピクセルB2については、フレーム1(γ2かつプラス極性に設定)→フレーム2(γ2かつマイナス極性に設定)→フレーム3(γ1かつプラス極性に設定)→フレーム4(γ1かつマイナス極性に設定)であり、第2ピクセルの黄サブピクセルY2については、フレーム1(γ2かつプラス極性に設定)→フレーム2(γ2かつマイナス極性に設定)→フレーム3(γ1かつプラス極性に設定)→フレーム4(γ1かつマイナス極性に設定)である。
For the red sub-pixel R2 of the second pixel, frame 1 (gamma 2 and set to negative polarity) → frame 2 (gamma 2 and set to positive polarity) → frame 3 (gamma 1 and set to negative polarity) → frame 4 (γ1 For the second pixel green sub-pixel G2, frame 1 (γ2 and negative polarity) → frame 2 (γ2 and positive polarity) → frame 3 (γ1 and negative polarity) Setting) → frame 4 (γ1 and set to positive polarity), and for the blue subpixel B2 of the second pixel, frame 1 (set to γ2 and positive polarity) → frame 2 (set to γ2 and negative polarity) → frame 3 (set to γ1 and positive polarity) → frame 4 (set to γ1 and negative polarity), and the yellow sub-pixel of the second pixel For frame Y2, frame 1 (set to γ2 and positive polarity) → frame 2 (set to γ2 and negative polarity) → frame 3 (set to γ1 and positive polarity) → frame 4 (set to γ1 and negative polarity) .
また、第3ピクセルの赤サブピクセルR3については、フレーム1(γ2かつマイナス極性に設定)→フレーム2(γ2かつプラス極性に設定)→フレーム3(γ1かつマイナス極性に設定)→フレーム4(γ1かつプラス極性に設定)であり、第3ピクセルの緑サブピクセルG3については、フレーム1(γ2かつマイナス極性に設定)→フレーム2(γ2かつプラス極性に設定)→フレーム3(γ1かつマイナス極性に設定)→フレーム4(γ1かつプラス極性に設定)であり、第3ピクセルの青サブピクセルB3については、フレーム1(γ2かつプラス極性に設定)→フレーム2(γ2かつマイナス極性に設定)→フレーム3(γ1かつプラス極性に設定)→フレーム4(γ1かつマイナス極性に設定)であり、第3ピクセルの黄サブピクセルY3については、フレーム1(γ2かつプラス極性に設定)→フレーム2(γ2かつマイナス極性に設定)→フレーム3(γ1かつプラス極性に設定)→フレーム4(γ1かつマイナス極性に設定)である。
For the red sub-pixel R3 of the third pixel, frame 1 (gamma 2 and set to negative polarity) → frame 2 (gamma 2 and set to positive polarity) → frame 3 (gamma 1 and set to negative polarity) → frame 4 (γ1 For the third pixel green sub-pixel G3, frame 1 (γ2 and negative polarity) → frame 2 (γ2 and positive polarity) → frame 3 (γ1 and negative polarity) Setting) → frame 4 (γ1 and set to positive polarity), and for the blue subpixel B3 of the third pixel, frame 1 (set to γ2 and positive polarity) → frame 2 (set to γ2 and negative polarity) → frame 3 (set to γ1 and positive polarity) → frame 4 (set to γ1 and negative polarity), and the yellow sub-pixel of the third pixel For frame Y3, frame 1 (set to γ2 and positive polarity) → frame 2 (set to γ2 and negative polarity) → frame 3 (set to γ1 and positive polarity) → frame 4 (set to γ1 and negative polarity) .
また、第4ピクセルの赤サブピクセルR4については、フレーム1(γ1かつプラス極性に設定)→フレーム2(γ1かつマイナス極性に設定)→フレーム3(γ2かつプラス極性に設定)→フレーム4(γ2かつマイナス極性に設定)であり、第4ピクセルの緑サブピクセルG4については、フレーム1(γ1かつプラス極性に設定)→フレーム2(γ1かつマイナス極性に設定)→フレーム3(γ2かつプラス極性に設定)→フレーム4(γ2かつマイナス極性に設定)であり、第4ピクセルの青サブピクセルB4については、フレーム1(γ1かつマイナス極性に設定)→フレーム2(γ1かつプラス極性に設定)→フレーム3(γ2かつマイナス極性に設定)→フレーム4(γ2かつプラス極性に設定)であり、第4ピクセルの黄サブピクセルY4については、フレーム1(γ1かつマイナス極性に設定)→フレーム2(γ1かつプラス極性に設定)→フレーム3(γ2かつマイナス極性に設定)→フレーム4(γ2かつプラス極性に設定)である。
For the red sub-pixel R4 of the fourth pixel, frame 1 (gamma 1 and set to positive polarity) → frame 2 (gamma 1 and set to negative polarity) → frame 3 (gamma 2 and set to positive polarity) → frame 4 (gamma 2 For the fourth pixel green sub-pixel G4, frame 1 (γ1 and positive polarity) → frame 2 (γ1 and negative polarity) → frame 3 (γ2 and positive polarity) Setting) → frame 4 (γ2 and set to negative polarity), and for the blue sub-pixel B4 of the fourth pixel, frame 1 (set to γ1 and negative polarity) → frame 2 (set to γ1 and positive polarity) → frame 3 (set to γ2 and negative polarity) → frame 4 (set to γ2 and positive polarity), and the yellow pixel of the fourth pixel For frame Y4, frame 1 (set to γ1 and negative polarity) → frame 2 (set to γ1 and positive polarity) → frame 3 (set to γ2 and negative polarity) → frame 4 (set to γ2 and positive polarity) .
このように、例えば、同一ピクセルに属し、γ特性の切り替わりパターンが等しい緑サブピクセルG1および黄サブピクセルY1(ともに視感度が相対的に大きい)について、緑サブピクセルG1に供給されるデータ信号の極性と、黄サブピクセルY1に供給されるデータ信号の極性とを異ならせる手法をとることで、以下の効果を得ることができる。
Thus, for example, for the green subpixel G1 and the yellow subpixel Y1 (both having relatively high visibility) that belong to the same pixel and have the same γ-characteristic switching pattern, the data signal supplied to the green subpixel G1 The following effects can be obtained by adopting a method of making the polarity different from the polarity of the data signal supplied to the yellow subpixel Y1.
すなわち、液晶パネルではVcom(共通電極の電位)をセンターにして、プラス極性の充電とマイナス極性の充電とを行っているが、プラス極性の充電による輝度とマイナス極性の充電による輝度とを、パネル全面で等しくすることは難しい。しかしながら上記の手法によれば、例えば、黄サブピクセルに、フレームN(プラスのγ1)からフレームN+1(マイナスのγ1)への極性反転に伴う輝度変化が生じても、これが、緑サブピクセルの、フレームN(マイナスのγ1)からフレームn+1(プラスのγ1)への極性反転に生じる輝度変化(黄サブピクセルの輝度変化と逆向き)によって抑制され、フリッカを低減することができる。
That is, in the liquid crystal panel, positive polarity charging and negative polarity charging are performed with Vcom (common electrode potential) at the center. However, the luminance due to positive polarity charging and the luminance due to negative polarity charging are determined by the panel. It is difficult to equalize all over. However, according to the above method, for example, even if the yellow subpixel undergoes a luminance change due to the polarity inversion from the frame N (plus γ1) to the frame N + 1 (minus γ1), Flicker can be reduced by being suppressed by a luminance change (opposite to the luminance change of the yellow sub-pixel) caused by polarity inversion from the frame N (minus γ1) to the frame n + 1 (plus γ1).
また、視感度が、黄色>緑色>赤色>青色の場合には、図1に示すように、黄サブピクセルY1のデータ信号の極性と青サブピクセルB1のデータ信号の極性とを同極性にするととともに、緑サブピクセルG1のデータ信号の極性と赤サブピクセルR1のデータ信号の極性とを同極性にすることで、より効果的にフリッカを抑制することができる。なお、視感度は、視感環境や各色の設定波長にもよるため、例えば、視感度が、緑色>黄色>赤色>青色の場合には、図6に示すように、緑色サブピクセルG1のデータ信号の極性と青色サブピクセルB1のデータ信号の極性とを同極性にするととともに、黄色サブピクセルY1のデータ信号の極性と赤色サブピクセルR1のデータ信号の極性とを同極性にすることで、より効果的にフリッカを抑制することができる。
Further, when the visibility is yellow> green> red> blue, as shown in FIG. 1, the polarity of the data signal of the yellow subpixel Y1 and the polarity of the data signal of the blue subpixel B1 are the same. At the same time, the polarity of the data signal of the green sub-pixel G1 and the polarity of the data signal of the red sub-pixel R1 can be made to be more effective in suppressing flicker. Note that the visual sensitivity depends on the visual environment and the set wavelength of each color. For example, when the visual sensitivity is green> yellow> red> blue, as shown in FIG. 6, data of the green subpixel G1 is used. By making the polarity of the signal and the polarity of the data signal of the blue subpixel B1 the same polarity, the polarity of the data signal of the yellow subpixel Y1 and the polarity of the data signal of the red subpixel R1 are further increased. Flicker can be effectively suppressed.
本液晶表示装置LCDでは高速駆動が好ましく、例えば図5のように、1画素列に2本のデータ信号線(SL・sL)を設けて走査信号線(GL1・GL3)を2本ずつ同時選択してもよい(2倍速駆動が可能)。さらに、1画素列に、パネル上半分に対応する2本、下半分に対応する2本の計4本のデータ信号線を設け、パネルを上下分割駆動してもよい(4倍速駆動が可能)。
In this liquid crystal display device LCD, high speed driving is preferable. For example, as shown in FIG. 5, two data signal lines (SL · sL) are provided in one pixel column, and two scanning signal lines (GL1 · GL3) are simultaneously selected. (Double speed driving is possible). Furthermore, a total of four data signal lines, two corresponding to the upper half of the panel and two corresponding to the lower half, may be provided in one pixel column, and the panel may be divided up and down (4 × speed driving is possible). .
〔実施例2〕
実施例1では、1ピクセルに属する4つのサブピクセルについてγの切り替えパターンを同一とし、また、これら4つのサブピクセルでデータ信号の極性が打ち消されるように設定しているがこれに限定されない。 [Example 2]
In the first embodiment, the switching pattern of γ is set to be the same for the four subpixels belonging to one pixel, and the polarity of the data signal is set to be canceled in these four subpixels. However, the present invention is not limited to this.
実施例1では、1ピクセルに属する4つのサブピクセルについてγの切り替えパターンを同一とし、また、これら4つのサブピクセルでデータ信号の極性が打ち消されるように設定しているがこれに限定されない。 [Example 2]
In the first embodiment, the switching pattern of γ is set to be the same for the four subpixels belonging to one pixel, and the polarity of the data signal is set to be canceled in these four subpixels. However, the present invention is not limited to this.
図7に示すように、第1ピクセルのR1並びに第2ピクセルのG2・B2・Y2および第3ピクセルのG3・B3・Y3についてγの切り替えパターンを第1パターン(γ1→γ1→γ2→γ2)とし、第1ピクセルのG1・B1・Y1並びに第2ピクセルのR2および第3ピクセルのR3についてγの切り替えパターンを第2パターン(γ2→γ2→γ1→γ1)として、隣接する2ピクセル単位でγ特性のバランスをとる(明と暗の打消しを図る)ことも可能である。
As shown in FIG. 7, the switching pattern of γ for the first pixel R1, the second pixel G2, B2, Y2, and the third pixel G3, B3, Y3 is the first pattern (γ1 → γ1 → γ2 → γ2). And the switching pattern of γ for the first pixel G1, B1, Y1, the second pixel R2 and the third pixel R3 as a second pattern (γ2 → γ2 → γ1 → γ1), It is also possible to balance the characteristics (to cancel light and dark).
さらに、図7に示すように、第1ピクセルのR1・B1・Y1並びに第2ピクセルのG2および第3ピクセルのG3についてデータ信号の極性を第1極性として、第1ピクセルのG1並びに第2ピクセルのR2・B2・Y2および第3ピクセルのR3・B3・Y3についてデータ信号の極性を第2極性として、隣接する2ピクセル単位でデータ信号の極性のバランスをとる(プラス極性とマイナス極性の打ち消しを図る)ことも可能である。
Further, as shown in FIG. 7, the first pixel G1 and the second pixel are set to the first polarity with respect to the first pixel R1, B1, Y1, the second pixel G2, and the third pixel G3. R2 ・ B2 ・ Y2 of the third pixel and R3 ・ B3 ・ Y3 of the third pixel, the polarity of the data signal is set to the second polarity, and the polarity of the data signal is balanced in units of two adjacent pixels. It is also possible to plan.
〔実施例3〕
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルのγの設定およびデータ信号の極性の設定については図1と同じとしつつ、これら4つのサブピクセルの並び順序を変え、図8に示すように、1ピクセル内でGのサブピクセルとYのサブピクセルとを行方向に隣接させることも可能である。 Example 3
In the present liquid crystal display device, the setting of γ of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the arrangement order of these four subpixels is changed, as shown in FIG. As described above, it is also possible to make the G subpixel and the Y subpixel adjacent in the row direction within one pixel.
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルのγの設定およびデータ信号の極性の設定については図1と同じとしつつ、これら4つのサブピクセルの並び順序を変え、図8に示すように、1ピクセル内でGのサブピクセルとYのサブピクセルとを行方向に隣接させることも可能である。 Example 3
In the present liquid crystal display device, the setting of γ of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the arrangement order of these four subpixels is changed, as shown in FIG. As described above, it is also possible to make the G subpixel and the Y subpixel adjacent in the row direction within one pixel.
〔実施例4〕
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルの並び順序およびデータ信号の極性の設定については図1と同じとしつつ、これら4つのサブピクセルのγの設定を変え、図9のように構成することも可能である。この場合、第1ピクセルのG1・Y1並びに第2ピクセルのG2・Y2および第3ピクセルのR3・B3についてγの切り替えパターンを第1パターン(γ1→γ1→γ2→γ2)とし、第1ピクセルのR1・B1並びに第2ピクセルのR2・B2および第3ピクセルのG3・Y3についてγの切り替えパターンを第2パターン(γ2→γ2→γ1→γ1)として、1ピクセル単位でデータ信号の極性のバランスとγ特性のバランスをとりつつ(明と暗の打消しを図りつつ)、明(γ1)・暗(γ2)を市松配置することも可能である。 Example 4
In the present liquid crystal display device, the arrangement order of the four sub-pixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the setting of γ of these four sub-pixels is changed as shown in FIG. It is also possible to configure. In this case, the switching pattern of γ is set to the first pattern (γ1 → γ1 → γ2 → γ2) for G1 · Y1 of the first pixel, G2 · Y2 of the second pixel, and R3 · B3 of the third pixel. For R1 and B1, R2 and B2 of the second pixel, and G3 and Y3 of the third pixel, the switching pattern of γ is the second pattern (γ2 → γ2 → γ1 → γ1), and the balance of the polarity of the data signal in units of one pixel It is also possible to place checkered arrangement of light (γ1) and dark (γ2) while balancing the γ characteristics (while canceling light and dark).
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルの並び順序およびデータ信号の極性の設定については図1と同じとしつつ、これら4つのサブピクセルのγの設定を変え、図9のように構成することも可能である。この場合、第1ピクセルのG1・Y1並びに第2ピクセルのG2・Y2および第3ピクセルのR3・B3についてγの切り替えパターンを第1パターン(γ1→γ1→γ2→γ2)とし、第1ピクセルのR1・B1並びに第2ピクセルのR2・B2および第3ピクセルのG3・Y3についてγの切り替えパターンを第2パターン(γ2→γ2→γ1→γ1)として、1ピクセル単位でデータ信号の極性のバランスとγ特性のバランスをとりつつ(明と暗の打消しを図りつつ)、明(γ1)・暗(γ2)を市松配置することも可能である。 Example 4
In the present liquid crystal display device, the arrangement order of the four sub-pixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the setting of γ of these four sub-pixels is changed as shown in FIG. It is also possible to configure. In this case, the switching pattern of γ is set to the first pattern (γ1 → γ1 → γ2 → γ2) for G1 · Y1 of the first pixel, G2 · Y2 of the second pixel, and R3 · B3 of the third pixel. For R1 and B1, R2 and B2 of the second pixel, and G3 and Y3 of the third pixel, the switching pattern of γ is the second pattern (γ2 → γ2 → γ1 → γ1), and the balance of the polarity of the data signal in units of one pixel It is also possible to place checkered arrangement of light (γ1) and dark (γ2) while balancing the γ characteristics (while canceling light and dark).
〔実施例5〕
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルのγの設定については図1と同じとしつつ、これら4つのサブピクセルの配置をストライプ配置からマトリクス配置(2行2列配置)に変え、図10のように構成することも可能である。図10では、1ピクセル単位でデータ信号の極性のバランスとγ特性のバランスをとりつつ(明と暗の打消しを図りつつ)、データ信号の極性をドット反転させることができる。 Example 5
In the present liquid crystal display device, the setting of γ of four subpixels included in one pixel is the same as that in FIG. 1, and the arrangement of these four subpixels is changed from a stripe arrangement to a matrix arrangement (2 rows and 2 columns arrangement). It is also possible to configure as shown in FIG. In FIG. 10, it is possible to invert the polarity of the data signal in dot units while balancing the polarity of the data signal and the γ characteristics (while canceling light and dark).
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルのγの設定については図1と同じとしつつ、これら4つのサブピクセルの配置をストライプ配置からマトリクス配置(2行2列配置)に変え、図10のように構成することも可能である。図10では、1ピクセル単位でデータ信号の極性のバランスとγ特性のバランスをとりつつ(明と暗の打消しを図りつつ)、データ信号の極性をドット反転させることができる。 Example 5
In the present liquid crystal display device, the setting of γ of four subpixels included in one pixel is the same as that in FIG. 1, and the arrangement of these four subpixels is changed from a stripe arrangement to a matrix arrangement (2 rows and 2 columns arrangement). It is also possible to configure as shown in FIG. In FIG. 10, it is possible to invert the polarity of the data signal in dot units while balancing the polarity of the data signal and the γ characteristics (while canceling light and dark).
また、1ピクセルに含まれる4つのサブピクセルのγの設定については図9と同じとしつつ、これら4つのサブピクセルの配置をストライプ配置からマトリクス配置(2行2列配置)に変え、図11や図12のように構成することも可能である。
In addition, the setting of γ of the four subpixels included in one pixel is the same as that in FIG. 9, but the arrangement of these four subpixels is changed from a stripe arrangement to a matrix arrangement (2 rows × 2 columns arrangement). It is also possible to configure as shown in FIG.
図11では、1ピクセル単位でデータ信号の極性のバランスとγ特性のバランスをとりつつ(明と暗の打消しを図りつつ)、1ピクセル内でGのサブピクセルとYのサブピクセルとを行方向に隣接させ、さらに、データ信号の極性をドット反転させることができる。
In FIG. 11, the G sub-pixel and the Y sub-pixel are performed within one pixel while balancing the polarity of the data signal and the gamma characteristic in units of one pixel (while canceling light and dark). Adjacent to the direction, the polarity of the data signal can be inverted.
図12では、1ピクセル単位でデータ信号の極性のバランスとγ特性のバランスをとりつつ(明と暗の打消しを図りつつ)、明(γ1)・暗(γ2)を市松配置することが可能である。
In FIG. 12, it is possible to arrange light (γ1) and dark (γ2) in a checkered pattern while balancing the polarity of the data signal and the γ characteristic (in order to cancel light and dark) in units of one pixel. It is.
〔実施例6〕
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルのγの設定およびデータ信号の極性の設定については図1と同じとしつつ、これらサブピクセルそれぞれに明領域と暗領域とを形成し、図13のように構成することも可能である。この場合、例えば、Y1の明領域(上側)とY1の暗領域(下側)との輝度の総和がγ1に一致し、Y2の明領域(上側)とY2の暗領域(下側)との輝度の総和がγ2に一致する。このように、サブピクセル内に異なるγ特性をもつ領域を形成することで、視野角特性を一層高めることができる。 Example 6
In the present liquid crystal display device, the setting of γ of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. It is also possible to configure as shown in FIG. In this case, for example, the sum of the luminances of the bright region (upper side) of Y1 and the dark region (lower side) of Y1 matches γ1, and the bright region (upper side) of Y2 and the dark region (lower side) of Y2 The total sum of luminance matches γ2. Thus, by forming regions having different γ characteristics in the subpixels, the viewing angle characteristics can be further enhanced.
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルのγの設定およびデータ信号の極性の設定については図1と同じとしつつ、これらサブピクセルそれぞれに明領域と暗領域とを形成し、図13のように構成することも可能である。この場合、例えば、Y1の明領域(上側)とY1の暗領域(下側)との輝度の総和がγ1に一致し、Y2の明領域(上側)とY2の暗領域(下側)との輝度の総和がγ2に一致する。このように、サブピクセル内に異なるγ特性をもつ領域を形成することで、視野角特性を一層高めることができる。 Example 6
In the present liquid crystal display device, the setting of γ of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. It is also possible to configure as shown in FIG. In this case, for example, the sum of the luminances of the bright region (upper side) of Y1 and the dark region (lower side) of Y1 matches γ1, and the bright region (upper side) of Y2 and the dark region (lower side) of Y2 The total sum of luminance matches γ2. Thus, by forming regions having different γ characteristics in the subpixels, the viewing angle characteristics can be further enhanced.
〔実施例7〕
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルの並び順序およびデータ信号の極性の設定については図1と同じとしつつ、これら4つのサブピクセルのγの切り替えパターンを増やし(4パターンとする)、図14のように構成することも可能である。この場合、γ特性の切り替わりパターンは、第1ピクセルが、フレームF1がγ1(明)→フレームF2がγ1(明)→フレームF3がγ2(暗)→フレームF3がγ2(暗)となっており、第4ピクセルが、フレームF1がγ2(暗)→フレームF2がγ2(暗)→フレームF3がγ1(明)→フレームF4がγ1(明)となっており、第2ピクセルが、フレームF1がγ2(暗)→フレームF2がγ1(明)→フレームF3がγ1(明)→フレームF3がγ2(暗)となっており、第3ピクセルが、フレームF1がγ1(明)→フレームF2がγ2(暗)→フレームF3がγ2(暗)→フレームF4がγ1(明)となっている。こうすれば、フレームの変わり目での輝度変化の量が均一化され、輝度変化の量自体も小さくなるため、フリッカを一層抑制することができる。 Example 7
In the present liquid crystal display device, the arrangement order of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the switching pattern of γ of these four subpixels is increased (four patterns and It is also possible to configure as shown in FIG. In this case, the switching pattern of the γ characteristics is such that the first pixel is γ1 (bright) in the frame F1, γ1 (bright) in the frame F2, γ2 (dark) in the frame F3, and γ2 (dark) in the frame F3. , The fourth pixel is γ2 (dark), the frame F2 is γ2 (dark), the frame F3 is γ1 (bright), the frame F4 is γ1 (bright), and the second pixel is the frame F1. γ2 (dark) → frame F2 is γ1 (bright) → frame F3 is γ1 (bright) → frame F3 is γ2 (dark), the third pixel is frame F1 is γ1 (bright) → frame F2 is γ2 (Dark) → frame F3 is γ2 (dark) → frame F4 is γ1 (bright). In this way, the amount of change in luminance at the transition between frames is made uniform, and the amount of change in luminance itself is reduced, so that flicker can be further suppressed.
本液晶表示装置では、1ピクセルに含まれる4つのサブピクセルの並び順序およびデータ信号の極性の設定については図1と同じとしつつ、これら4つのサブピクセルのγの切り替えパターンを増やし(4パターンとする)、図14のように構成することも可能である。この場合、γ特性の切り替わりパターンは、第1ピクセルが、フレームF1がγ1(明)→フレームF2がγ1(明)→フレームF3がγ2(暗)→フレームF3がγ2(暗)となっており、第4ピクセルが、フレームF1がγ2(暗)→フレームF2がγ2(暗)→フレームF3がγ1(明)→フレームF4がγ1(明)となっており、第2ピクセルが、フレームF1がγ2(暗)→フレームF2がγ1(明)→フレームF3がγ1(明)→フレームF3がγ2(暗)となっており、第3ピクセルが、フレームF1がγ1(明)→フレームF2がγ2(暗)→フレームF3がγ2(暗)→フレームF4がγ1(明)となっている。こうすれば、フレームの変わり目での輝度変化の量が均一化され、輝度変化の量自体も小さくなるため、フリッカを一層抑制することができる。 Example 7
In the present liquid crystal display device, the arrangement order of the four subpixels included in one pixel and the setting of the polarity of the data signal are the same as in FIG. 1, but the switching pattern of γ of these four subpixels is increased (four patterns and It is also possible to configure as shown in FIG. In this case, the switching pattern of the γ characteristics is such that the first pixel is γ1 (bright) in the frame F1, γ1 (bright) in the frame F2, γ2 (dark) in the frame F3, and γ2 (dark) in the frame F3. , The fourth pixel is γ2 (dark), the frame F2 is γ2 (dark), the frame F3 is γ1 (bright), the frame F4 is γ1 (bright), and the second pixel is the frame F1. γ2 (dark) → frame F2 is γ1 (bright) → frame F3 is γ1 (bright) → frame F3 is γ2 (dark), the third pixel is frame F1 is γ1 (bright) → frame F2 is γ2 (Dark) → frame F3 is γ2 (dark) → frame F4 is γ1 (bright). In this way, the amount of change in luminance at the transition between frames is made uniform, and the amount of change in luminance itself is reduced, so that flicker can be further suppressed.
本液晶表示装置は、1つのサブピクセルに供給するデータ信号の極性をnフレーム(nは自然数)ごとに反転させるとともに、このサブピクセルのγ特性を周期的に切り替える液晶表示装置であって、第1~第4サブピクセルを含み、第1~第4サブピクセルはそれぞれ第1~第4色であり、第1色は、第3および第4色よりも視感度が高く、第2色は、第3および第4色よりも視感度が高く、第1および第2サブピクセルはγ特性の切り替わりパターンが等しく、同一フレームでは、第1サブピクセルに供給されるデータ信号の極性と第2サブピクセルに供給されるデータ信号の極性とが異なることを特徴とする。
The present liquid crystal display device is a liquid crystal display device that inverts the polarity of a data signal supplied to one subpixel every n frames (n is a natural number) and periodically switches the γ characteristic of the subpixel. 1 to 4 sub-pixels, and the first to fourth sub-pixels are first to fourth colors, respectively. The first color has higher visibility than the third and fourth colors, and the second color is The visibility is higher than that of the third and fourth colors, and the first and second subpixels have the same γ-characteristic switching pattern. In the same frame, the polarity of the data signal supplied to the first subpixel and the second subpixel The polarity of the data signal supplied to is different.
上記構成によれば、相対的に視感度が高い第1および第2サブピクセルについて、第1サブピクセルに極性反転に伴う輝度変化が生じても、これが、第2サブピクセルの極性反転に生じる輝度変化(第1サブピクセルの輝度変化と逆向き)によって抑制され、フリッカを低減することができる。
According to the above configuration, for the first and second subpixels having relatively high visibility, even if the luminance change caused by the polarity inversion occurs in the first subpixel, this is the luminance generated in the polarity inversion of the second subpixel. It is suppressed by the change (opposite to the luminance change of the first sub-pixel), and flicker can be reduced.
本液晶表示装置では、第3および第4サブピクセルはγ特性の切り替わりパターンが等しく、同一フレームでは、第3サブピクセルに供給されるデータ信号の極性と第4サブピクセルに供給されるデータ信号の極性とが異なる構成とすることもできる。
In the present liquid crystal display device, the third and fourth subpixels have the same switching pattern of γ characteristics, and in the same frame, the polarity of the data signal supplied to the third subpixel and the data signal supplied to the fourth subpixel are the same. It can also be set as the structure from which polarity differs.
本液晶表示装置では、第1および第2サブピクセルが同一ピクセルに属する構成とすることもできる。
In the present liquid crystal display device, the first and second subpixels may belong to the same pixel.
本液晶表示装置では、第3および第4色はそれぞれ、赤色および青色である構成とすることもできる。
In the present liquid crystal display device, the third and fourth colors may be red and blue, respectively.
本液晶表示装置では、第1~第4サブピクセルはγ特性の切り替わりパターンが等しく、第1色は、第2色よりも視感度が高く、第3色は、第4色よりも視感度が高く、同一フレームでは、第1サブピクセルに供給されるデータ信号の極性と第4サブピクセルに供給されるデータ信号の極性とが同一であるとともに、第2サブピクセルに供給されるデータ信号の極性と第3サブピクセルに供給されるデータ信号の極性とが同一である構成とすることもできる。
In the present liquid crystal display device, the first to fourth sub-pixels have the same γ characteristic switching pattern, the first color has higher visibility than the second color, and the third color has higher visibility than the fourth color. In the same frame, the polarity of the data signal supplied to the first subpixel is the same as the polarity of the data signal supplied to the fourth subpixel, and the polarity of the data signal supplied to the second subpixel. The polarity of the data signal supplied to the third subpixel may be the same.
本液晶表示装置では、第1および第2サブピクセルとγ特性の切り替わりパターンが異なる第5および第6サブピクセルを含み、第5および第6サブピクセルはそれぞれ第1および第2色である構成とすることもできる。
The liquid crystal display device includes fifth and sixth subpixels having different γ-characteristic switching patterns from the first and second subpixels, and the fifth and sixth subpixels have first and second colors, respectively. You can also
本液晶表示装置では、同一フレームでは、第5サブピクセルに供給されるデータ信号の極性と第6サブピクセルに供給されるデータ信号の極性とが異なる構成とすることもできる。
In the present liquid crystal display device, the polarity of the data signal supplied to the fifth subpixel and the polarity of the data signal supplied to the sixth subpixel may be different in the same frame.
本液晶表示装置では、第1~第4サブピクセルそれぞれのγ特性がmフレームごとに切り替わる構成とすることもできる。
In the present liquid crystal display device, the γ characteristic of each of the first to fourth subpixels can be switched every m frames.
本液晶表示装置では、n<mである構成とすることもできる。
In the present liquid crystal display device, it may be configured such that n <m.
本液晶表示装置では、第1および第2色はそれぞれ、黄色および緑色である構成とすることもできる。
In the present liquid crystal display device, the first and second colors may be yellow and green, respectively.
本液晶表示装置では、1フレーム期間が240分の1〔秒〕未満である構成とすることもできる。
In the present liquid crystal display device, one frame period may be less than 1/240 [second].
本液晶表示装置では、第1~第4サブピクセルそれぞれに複数の画素電極が含まれ、中間調表示時に、これら画素電極の1つと、別の1つとに異なる実効電圧が加えられる構成とすることもできる。
In the present liquid crystal display device, each of the first to fourth sub-pixels includes a plurality of pixel electrodes, and a different effective voltage is applied to one of these pixel electrodes and another one during halftone display. You can also.
本液晶表示装置では、第1~第4サブピクセルそれぞれのγ特性が第1および第2特性間でmフレームごとに切り替わり、第1~第4サブピクセルそれぞれについて、同一階調では第1特性の輝度≧第2特性の輝度である構成とすることもできる。
In the present liquid crystal display device, the γ characteristics of the first to fourth subpixels are switched between the first and second characteristics every m frames, and the first to fourth subpixels have the first characteristic at the same gradation. A configuration in which luminance ≧ luminance of the second characteristic may be employed.
本液晶表示装置では、第1サブピクセルが第1特性であるときに、第2サブピクセルも第1特性であり、第1サブピクセルが第2特性であるときに、第2サブピクセルも第2特性である構成とすることもできる。
In the present liquid crystal display device, when the first subpixel has the first characteristic, the second subpixel also has the first characteristic, and when the first subpixel has the second characteristic, the second subpixel also has the second characteristic. It can also be set as the characteristic.
液晶パネルの駆動方法は、1つのサブピクセルに供給するデータ信号の極性をnフレーム(nは自然数)ごとに反転させるとともに、このサブピクセルのγ特性を周期的に切り替える液晶パネルの駆動方法であって、第1~第4サブピクセルを含み、第1~第4サブピクセルはそれぞれ第1~第4色であり、第1色は第3および第4色よりも視感度が高いとともに、第2色は第3および第4色よりも視感度が高く、第1および第2サブピクセルはγ特性の切り替わりパターンが等しく、同一フレームでは、第1サブピクセルに供給されるデータ信号の極性と第2サブピクセルに供給されるデータ信号の極性とを異ならせることを特徴とする。
The liquid crystal panel driving method is a liquid crystal panel driving method in which the polarity of a data signal supplied to one subpixel is inverted every n frames (n is a natural number) and the γ characteristic of the subpixel is periodically switched. The first to fourth subpixels are first to fourth colors, respectively, and the first color has higher visibility than the third and fourth colors, and the second color The colors have higher visibility than the third and fourth colors, the first and second subpixels have the same γ-characteristic switching pattern, and in the same frame, the polarity of the data signal supplied to the first subpixel and the second The polarity of the data signal supplied to the sub-pixel is different.
本発明は上記の実施の形態に限定されるものではなく、上記実施の形態を技術常識に基づいて適宜変更したものやそれらを組み合わせて得られるものも本発明の実施の形態に含まれる。
The present invention is not limited to the above-described embodiments, and those obtained by appropriately modifying the above-described embodiments based on common general technical knowledge and those obtained by combining them are also included in the embodiments of the present invention.
本発明は、液晶TVや液晶ディスプレイに好適である。
The present invention is suitable for a liquid crystal TV and a liquid crystal display.
R1~R4 赤のサブピクセル
G1~G4 緑のサブピクセル
B1~B4 青のサブピクセル
Y1~Y4 黄のサブピクセル
LCD 液晶表示装置
LCP 液晶パネル
DCS 表示制御基板
γ1 明側のγ特性
γ2 暗側のγ特性 R1 to R4 Red subpixel G1 to G4 Green subpixel B1 to B4 Blue subpixel Y1 to Y4 Yellow subpixel LCD Liquid crystal display device LCP Liquid crystal panel DCS Display control board γ1 Bright side γ characteristics γ2 Dark side γ Characteristic
G1~G4 緑のサブピクセル
B1~B4 青のサブピクセル
Y1~Y4 黄のサブピクセル
LCD 液晶表示装置
LCP 液晶パネル
DCS 表示制御基板
γ1 明側のγ特性
γ2 暗側のγ特性 R1 to R4 Red subpixel G1 to G4 Green subpixel B1 to B4 Blue subpixel Y1 to Y4 Yellow subpixel LCD Liquid crystal display device LCP Liquid crystal panel DCS Display control board γ1 Bright side γ characteristics γ2 Dark side γ Characteristic
Claims (15)
- nを自然数として、1つのサブピクセルに供給するデータ信号の極性をnフレームごとに反転させるとともに、このサブピクセルのγ特性を周期的に切り替える液晶表示装置であって、
第1~第4サブピクセルを含み、第1~第4サブピクセルはそれぞれ第1~第4色であり、第1色は、第3および第4色よりも視感度が高く、第2色は、第3および第4色よりも視感度が高く、第1および第2サブピクセルはγ特性の切り替わりパターンが等しく、同一フレームでは、第1サブピクセルに供給されるデータ信号の極性と第2サブピクセルに供給されるデータ信号の極性とが異なる液晶表示装置。 A liquid crystal display device in which n is a natural number and the polarity of a data signal supplied to one subpixel is inverted every n frames, and the γ characteristic of the subpixel is periodically switched.
Includes first to fourth sub-pixels, and the first to fourth sub-pixels are first to fourth colors, respectively. The first color has higher visibility than the third and fourth colors, and the second color is , The visibility is higher than that of the third and fourth colors, and the first and second subpixels have the same switching pattern of γ characteristics. In the same frame, the polarity of the data signal supplied to the first subpixel and the second subpixel A liquid crystal display device in which the polarity of a data signal supplied to a pixel is different. - 第3および第4サブピクセルはγ特性の切り替わりパターンが等しく、同一フレームでは、第3サブピクセルに供給されるデータ信号の極性と第4サブピクセルに供給されるデータ信号の極性とが異なる請求項1記載の液晶表示装置。 The third and fourth subpixels have the same γ-characteristic switching pattern, and the polarity of the data signal supplied to the third subpixel and the polarity of the data signal supplied to the fourth subpixel are different in the same frame. 1. A liquid crystal display device according to 1.
- 第1および第2サブピクセルが同一ピクセルに属する請求項1記載の液晶表示装置。 2. The liquid crystal display device according to claim 1, wherein the first and second sub-pixels belong to the same pixel.
- 第3および第4色はそれぞれ、赤色および青色である請求項1記載の液晶表示装置。 3. The liquid crystal display device according to claim 1, wherein the third and fourth colors are red and blue, respectively.
- 第1~第4サブピクセルはγ特性の切り替わりパターンが等しく、第1色は、第2色よりも視感度が高く、第3色は、第4色よりも視感度が高く、同一フレームでは、第1サブピクセルに供給されるデータ信号の極性と第4サブピクセルに供給されるデータ信号の極性とが同一であるとともに、第2サブピクセルに供給されるデータ信号の極性と第3サブピクセルに供給されるデータ信号の極性とが同一である請求項3記載の液晶表示装置。 The first to fourth sub-pixels have the same γ characteristic switching pattern, the first color has higher visibility than the second color, the third color has higher visibility than the fourth color, and in the same frame, The polarity of the data signal supplied to the first sub-pixel and the polarity of the data signal supplied to the fourth sub-pixel are the same, and the polarity of the data signal supplied to the second sub-pixel and the third sub-pixel 4. The liquid crystal display device according to claim 3, wherein the polarity of the supplied data signal is the same.
- 第1および第2サブピクセルとγ特性の切り替わりパターンが異なる第5および第6サブピクセルを含み、第5および第6サブピクセルはそれぞれ第1および第2色である請求項1記載の液晶表示装置。 2. The liquid crystal display device according to claim 1, further comprising fifth and sixth subpixels having different γ-characteristic switching patterns from the first and second subpixels, wherein the fifth and sixth subpixels have the first and second colors, respectively. .
- 同一フレームでは、第5サブピクセルに供給されるデータ信号の極性と第6サブピクセルに供給されるデータ信号の極性とが異なる請求項6記載の液晶表示装置。 The liquid crystal display device according to claim 6, wherein the polarity of the data signal supplied to the fifth sub-pixel and the polarity of the data signal supplied to the sixth sub-pixel are different in the same frame.
- mを自然数として、第1~第4サブピクセルそれぞれのγ特性がmフレームごとに切り替わる請求項1記載の液晶表示装置。 2. The liquid crystal display device according to claim 1, wherein γ characteristics of the first to fourth sub-pixels are switched every m frames, where m is a natural number.
- n<mである請求項8記載の液晶表示装置。 The liquid crystal display device according to claim 8, wherein n <m.
- 第1および第2色はそれぞれ、黄色および緑色である請求項1記載の液晶表示装置。 2. The liquid crystal display device according to claim 1, wherein the first and second colors are yellow and green, respectively.
- 1フレーム期間が240分の1〔秒〕未満である請求項1記載の液晶表示装置。 2. The liquid crystal display device according to claim 1, wherein one frame period is less than 1/240 second.
- 第1~第4サブピクセルそれぞれに複数の画素電極が含まれ、中間調表示時に、これら画素電極の1つと、別の1つとに異なる実効電圧が加えられる請求項1記載の液晶表示装置。 2. The liquid crystal display device according to claim 1, wherein each of the first to fourth sub-pixels includes a plurality of pixel electrodes, and different effective voltages are applied to one of the pixel electrodes and the other one during halftone display.
- 第1~第4サブピクセルそれぞれのγ特性が第1および第2特性間でmフレームごとに切り替わり、
第1~第4サブピクセルそれぞれについて、同一階調では第1特性の輝度≧第2特性の輝度である請求項8記載の液晶表示装置。 The γ characteristic of each of the first to fourth subpixels is switched between the first and second characteristics every m frames,
9. The liquid crystal display device according to claim 8, wherein, for each of the first to fourth subpixels, the luminance of the first characteristic ≧ the luminance of the second characteristic at the same gradation. - 第1サブピクセルが第1特性であるときに、第2サブピクセルも第1特性であり、
第1サブピクセルが第2特性であるときに、第2サブピクセルも第2特性である請求項13記載の液晶表示装置。 When the first subpixel has the first characteristic, the second subpixel also has the first characteristic,
14. The liquid crystal display device according to claim 13, wherein when the first subpixel has the second characteristic, the second subpixel also has the second characteristic. - 1つのサブピクセルに供給するデータ信号の極性をnフレーム(nは自然数)ごとに反転させるとともに、このサブピクセルのγ特性を周期的に切り替える液晶パネルの駆動方法であって、
第1~第4サブピクセルを含み、第1~第4サブピクセルはそれぞれ第1~第4色であり、第1色は第3および第4色よりも視感度が高いとともに、第2色は第3および第4色よりも視感度が高く、第1および第2サブピクセルはγ特性の切り替わりパターンが等しく、同一フレームでは、第1サブピクセルに供給されるデータ信号の極性と第2サブピクセルに供給されるデータ信号の極性とを異ならせる液晶パネルの駆動方法。 A method of driving a liquid crystal panel that inverts the polarity of a data signal supplied to one subpixel every n frames (n is a natural number) and periodically switches the γ characteristic of the subpixel,
Includes first to fourth sub-pixels, and the first to fourth sub-pixels are first to fourth colors, respectively. The first color has higher visibility than the third and fourth colors, and the second color is The visibility is higher than that of the third and fourth colors, and the first and second subpixels have the same γ-characteristic switching pattern. In the same frame, the polarity of the data signal supplied to the first subpixel and the second subpixel A method for driving a liquid crystal panel in which the polarity of a data signal supplied to the LCD is different.
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