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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 PDF

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Publication number
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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WIPO (PCT)
Prior art keywords
polarity
pixel
liquid crystal
display device
subpixel
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PCT/JP2012/071236
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French (fr)
Japanese (ja)
Inventor
雅江 北山
健太郎 入江
下敷領　文一
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シャープ株式会社
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Publication of WO2013031610A1 publication Critical patent/WO2013031610A1/en

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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
    • 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
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
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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

液晶表示装置、液晶パネルの駆動方法Liquid crystal display device and liquid crystal panel driving method
　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.
特開平７－１２１１４４号公報JP-A-7-121144
　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.
実施例１の液晶表示装置の表示状態を示す模式図である。6 is a schematic diagram illustrating a display state of the liquid crystal display device of Example 1. FIG. 図１の液晶表示装置の構成を示すブロック図である。It is a block diagram which shows the structure of the liquid crystal display device of FIG. 色別の比視感度を示すグラフである。It is a graph which shows the specific luminous sensitivity according to color. ４色（４ピクセル）それぞれの２種類のγ特性（γ１・γ２）を示すグラフである。4 is a graph showing two types of γ characteristics (γ1 · γ2) for each of four colors (4 pixels). 図１の液晶表示装置の画素まわりの構成を示す回路図である。FIG. 2 is a circuit diagram illustrating a configuration around a pixel of the liquid crystal display device of FIG. 1. 実施例１の変形例を示す模式図である。FIG. 6 is a schematic diagram illustrating a modified example of the first embodiment. 実施例２の液晶表示装置の表示状態を示す模式図である。6 is a schematic diagram showing a display state of a liquid crystal display device of Example 2. FIG. 実施例３の液晶表示装置の表示状態を示す模式図である。6 is a schematic diagram illustrating a display state of a liquid crystal display device of Example 3. FIG. 実施例４の液晶表示装置の表示状態を示す模式図である。FIG. 10 is a schematic diagram illustrating a display state of the liquid crystal display device of Example 4. 実施例５の液晶表示装置の表示状態を示す模式図である。FIG. 10 is a schematic diagram illustrating a display state of a liquid crystal display device of Example 5. 実施例５の別の変形例を示す模式図である。FIG. 10 is a schematic diagram illustrating another modification of the fifth embodiment. 実施例５のさらに別の変形例を示す模式図である。FIG. 10 is a schematic diagram illustrating still another modification example of the fifth embodiment. 実施例６の液晶表示装置の表示状態を示す模式図である。FIG. 10 is a schematic diagram showing a display state of a liquid crystal display device of Example 6. 実施例７の液晶表示装置の表示状態を示す模式図である。FIG. 10 is a schematic diagram showing a display state of a liquid crystal display device of Example 7. 液晶表示装置の表示状態の参考例を示す模式図である。It is a schematic diagram which shows the reference example of the display state of a liquid crystal display device.
　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.
　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.
　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.
　〔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).
　〔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).
　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.
　〔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

Claims (15)

  1. 　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.
  2. 　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.
  3. 　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.
  4. 　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.
  5. 　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.
  6. 　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. .
  7. 　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.
  8. 　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.
  9. 　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.
  10. 　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.
  11. 　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.
  12. 　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.
  13. 　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.
  14. 　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.
  15. 　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.
PCT/JP2012/071236 2011-08-26 2012-08-22 Liquid-crystal display device and method for driving liquid-crystal panel WO2013031610A1 (en)

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CN104376817A (en) * 2013-08-12 2015-02-25 顾晶 Method for driving LCD panel and driving IC of LCD panel
CN104575432A (en) * 2015-02-03 2015-04-29 京东方科技集团股份有限公司 Display panel driving method, display panel and display device
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CN104376817A (en) * 2013-08-12 2015-02-25 顾晶 Method for driving LCD panel and driving IC of LCD panel
CN104575432A (en) * 2015-02-03 2015-04-29 京东方科技集团股份有限公司 Display panel driving method, display panel and display device
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