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WO2012004922A1 - Système d'affichage à cristaux liquides et procédé de commande d'un système d'affichage à cristaux liquides - Google Patents

Système d'affichage à cristaux liquides et procédé de commande d'un système d'affichage à cristaux liquides Download PDF

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Publication number
WO2012004922A1
WO2012004922A1 PCT/JP2011/002709 JP2011002709W WO2012004922A1 WO 2012004922 A1 WO2012004922 A1 WO 2012004922A1 JP 2011002709 W JP2011002709 W JP 2011002709W WO 2012004922 A1 WO2012004922 A1 WO 2012004922A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
light
crystal display
display panel
state
Prior art date
Application number
PCT/JP2011/002709
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English (en)
Japanese (ja)
Inventor
吉田裕志
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シャープ株式会社
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Publication of WO2012004922A1 publication Critical patent/WO2012004922A1/fr

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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
    • G09G3/3651—Control of matrices with row and column drivers using an active matrix using multistable liquid crystals, e.g. ferroelectric liquid crystals
    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13476—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer assumes a scattering state
    • 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
    • G09G2300/02—Composition of display devices
    • G09G2300/023—Display panel composed of stacked panels
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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
    • G09G2320/066—Adjustment of display parameters for control of contrast
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Definitions

  • the present invention relates to a liquid crystal display system used for digital signage and the like, and a control method for the liquid crystal display system.
  • Patent Documents 1 and 2 which advertises by playing high-quality video such as high-definition image quality on the display of the image display panel outdoors or in stores. System exists.
  • Digital signage can distribute advertisements and the like by distributing and displaying moving images and still images on an image display panel using a network or the like. Since this digital signage display has the advantages of being thin, light and low power consumption, for example, a liquid crystal display panel is often used as an image display panel.
  • Patent Document 3 discloses a liquid crystal display device having a display region in which a plurality of subpixels each having a region and a light transmission region are formed.
  • This liquid crystal display device is configured such that the light reflection region and the light transmission region of each of the plurality of sub-pixels are driven independently of each other.
  • the light reflection region is temporarily DC-driven to display a specific image.
  • the specific image is continuously displayed on the display even when the power is off.
  • the present invention has been made in view of such problems, and even when the image display panel is turned off and power consumption is reduced, information display that can be sufficiently used as a transmission medium for advertisements and advertisements.
  • An object of the present invention is to provide a liquid crystal display system capable of realizing the above.
  • a liquid crystal display system is formed by overlapping an image display panel for forming an image and a light scattering liquid crystal display panel having a light scattering liquid crystal layer between electrodes.
  • a light-scattering pixel is formed to scatter incident light, thereby performing bright color display at a predetermined location on the light-scattering liquid crystal display panel and light.
  • pixels in the transmissive state and performing dark color display on other parts of the light-scattering liquid crystal display panel By forming pixels in the transmissive state and performing dark color display on other parts of the light-scattering liquid crystal display panel, a light-dark image comprising a combination of these light-color display and dark-color display is displayed on the light-scattering liquid crystal display panel.
  • the liquid crystal display system includes a first transparent substrate having a first electrode and disposed on the front side, and a second having a second electrode and disposed on the back side.
  • a transparent substrate and a light-scattering liquid crystal layer disposed between the first transparent substrate and the second transparent substrate so that the first electrode and the second electrode face each other;
  • a light-scattering liquid crystal display panel configured as described above, an image display panel that is disposed on the back side of the light-scattering liquid crystal display panel and forms an image, and a liquid crystal control unit that controls the alignment state of the liquid crystal In the first state in which the image display panel forms an image, the liquid crystal controller forms an electric field between the first electrode and the second electrode in the light-scattering liquid crystal display panel, thereby scattering light.
  • the liquid crystal layer is in a light transmitting state, and the image formed by the image display panel is converted into a light scattering liquid.
  • the second display is performed at a predetermined position on the light-scattering liquid crystal display panel.
  • An electric field is formed between the first electrode and the second electrode to make the light-scattering liquid crystal layer in a light-transmitting state for dark color display, and at other locations on the light-scattering liquid crystal display panel, between the electrodes.
  • the light-scattering liquid crystal layer is in a light-scattering state by forming an electric field to scatter external light to display bright colors, and a light-dark image composed of a combination of the light-color display and the dark-color display is displayed on the light-scattering liquid crystal display. It is displayed on a panel.
  • the bright color display is a color display recognized based on scattered light, for example, white display.
  • the dark color display is a color display recognized based on the fact that external light does not pass through the aligned light-scattering liquid crystal layer and is reflected, for example, black display or gray display.
  • the light-scattering liquid crystal layer means that when no voltage is applied, the alignment state of the liquid crystal molecules is random, and the incident light is scattered and appears white (the liquid crystal shutter is closed).
  • the liquid crystal layer has a behavior in which the liquid crystal molecules are aligned in parallel to the electric field and transmit light (the liquid crystal shutter is opened).
  • pixels in the light scattering state are formed on the light scattering liquid crystal display panel to perform bright color display at a predetermined location, and in the light transmission state.
  • a light / dark image composed of a combination of light color display and dark color display can be formed on a light-scattering liquid crystal display panel, thus saving power consumption
  • advertising and advertising functions can be sufficiently performed.
  • the image display panel may include a third transparent substrate on which a third electrode is disposed, a fourth transparent substrate on which a fourth electrode is disposed, and the third electrode and the fourth electrode so as to face each other.
  • a liquid crystal display panel having a liquid crystal layer disposed between a third transparent substrate and the fourth transparent substrate and sealed between the third transparent substrate, the third transparent substrate of the liquid crystal display panel, and the light It is also possible to dispose the second liquid crystal display panel so as to face the second transparent substrate. According to this configuration, the image display panel can be configured with low power consumption and a thin shape.
  • the liquid crystal control unit preferably places the liquid crystal layer of the liquid crystal display panel in a light non-transmissive state.
  • the liquid crystal layer of the liquid crystal display panel in the second state, is in a light non-transmissive state, so that light from the back side of the liquid crystal display panel does not pass through the liquid crystal display panel, and thus the light scattering liquid crystal A dark color display formed at a predetermined position on the display panel can be displayed clearly.
  • a state it is preferable to turn on the backlight, while in the case of the second state, it is preferable to turn off the backlight or turn it on in a low power consumption state.
  • lighting the backlight in a low power consumption state means that the light emission portion of the backlight is lit dimly to suppress power consumption.
  • the image in the first state, the image can be brightly displayed by backlight illumination.
  • the backlight in the second state, the backlight is turned off or in a low power consumption state. Power saving can be achieved.
  • the backlight control includes a backlight having a plurality of light emitting units that irradiate illumination light on the back side of the liquid crystal display panel, and a backlight control unit that controls lighting and extinguishing states of the backlight.
  • the unit turns on the backlight in the first state, while turning on a part of the light emitting unit and turns off the other part in the second state. Even in this configuration, in the second state, only a part of the backlight is lit, so that power saving can be achieved.
  • the liquid crystal control unit includes a backlight having a plurality of light emitting units that irradiate illumination light on the back side of the liquid crystal display panel, and a backlight control unit that controls lighting and extinguishing states of the backlight.
  • the liquid crystal layer of the liquid crystal display panel is set in a light transmitting state
  • the backlight control unit is a portion where a dark color display of the light scattering liquid crystal display panel is formed in the second state. It is also possible to turn off the light-emitting portion of the backlight corresponding to, while turning on the light-emitting portion of the backlight corresponding to the location where the bright color display is formed.
  • the contrast ratio may be weakened because the bright color display due to the scattered light is blurred. Even if the intensity of the light is low, the light of the backlight is scattered by the liquid crystal molecules in a random state by scattering the light emitting part of the backlight corresponding to the place where the bright color display is formed. By generating light and thus supplementing the light color display, the contrast between the light color display and the dark color display can be enhanced.
  • a backlight having a plurality of light emitting units for irradiating illumination light to the back side of the liquid crystal display panel, a backlight control unit for controlling the lighting and extinguishing states of the backlight, and a plurality of arranged in a matrix
  • a plurality of photosensors that detect the intensity of external light in a display area composed of display pixels for each predetermined region, and the liquid crystal control unit emits light to the liquid crystal layer of the liquid crystal display panel in the second state.
  • the backlight control unit corresponds to the region. It is also possible to light the light emitting unit.
  • the bright color display in that region may become blurry than other regions and the contrast ratio may be different from other regions
  • the contrast between the color display and the dark color display can be enhanced.
  • a plurality of optical sensors that detect the intensity of external light in a display unit composed of a plurality of display pixels arranged in a matrix for each predetermined region, and the intensity of external light based on the detection result by the optical sensor It is also possible to have an image correction unit that corrects an image displayed on the display unit in accordance with the distribution in the display unit.
  • the bright color display in that region may be emphasized more than other regions and the contrast ratio may be different from other regions
  • the liquid crystal molecules in that region are aligned in a slightly light transmitting state, so that it becomes a slightly dark state and suppresses bright color display enhancement. Can be made. Therefore, even if the external light intensity varies depending on the position on the display unit, the customer can visually recognize an image in which the original contrast is maintained on the entire screen.
  • the light scattering liquid crystal layer of the light scattering liquid crystal display panel reflects outside light that has entered the light transmissive liquid crystal layer to a region that is not a region that forms a light transmission state. It is preferable to form a reflecting mirror plate that is scattered by the step.
  • the light-scattering liquid crystal layer of the light-scattering liquid crystal display panel there are areas that do not contribute to the light transmission state, for example, the upper part of the wiring on the pixel or the area immediately below the black matrix.
  • the external light that has entered the scattering liquid crystal layer is reflected by the reflecting mirror plate to the scattering liquid crystal layer and scattered within the scattering liquid crystal layer, Since the bright color display is emphasized, the contrast of the image formed on the light-scattering liquid crystal display panel can be made clearer.
  • the color filter layer is formed on the back inner side of the first transparent substrate, the image is displayed on the light-scattering liquid crystal display panel in the first state in which an image is formed on the image display panel.
  • the image can be displayed in color, and the advertising and advertising functions can be sufficiently performed.
  • the color filter is not formed on the inner side of the back surface of the third transparent substrate, it is possible to prevent a decrease in transparency due to the overlapping of the color filters.
  • the color filter layer is formed on the front inner side of the second transparent substrate, it is displayed on the light-scattering liquid crystal display panel in the first state in which an image is formed on the image display panel.
  • the image can be displayed in color, and the advertising and advertising functions can be sufficiently performed.
  • no color filter is formed on the inner side of the front surface of the fourth transparent substrate, it is possible to prevent a decrease in permeability caused by overlapping the color filters.
  • color display is performed by controlling the light scattering liquid crystal layer of the light scattering liquid crystal display panel to a light scattering state or a light transmission state. It can be carried out. For example, when a green pigment is mixed in the light-scattering liquid crystal layer, if the light-scattering liquid crystal layer of the light-scattering liquid crystal display panel is put in a light-scattering state, green light is absorbed and is not emitted in the viewing direction, but light transmission If it will be in a state, green light will be inject
  • the third transparent substrate of the image display panel and the second transparent substrate of the light scattering liquid crystal display panel may be a single transparent substrate in common.
  • the liquid crystal control unit displays the image on the image display panel by changing the light scattering liquid crystal layer of the light scattering liquid crystal display panel to a light transmitting state or a light scattering state. It is possible to control the viewing angle dependence for the image being rendered.
  • the image when displaying an image on the image display panel, if the light scattering liquid crystal layer of the light scattering liquid crystal display panel is in a light scattering state, the image can be recognized in a wide visual range. On the other hand, if the light transmission state is set, the viewing angle can be narrowed and the contrast ratio of the image can be improved, which is convenient when there is only one user.
  • the light-scattering liquid crystal layer is preferably a memory liquid crystal layer.
  • the memory liquid crystal layer is a liquid crystal having a plurality of optical states and maintaining a specific state (memory characteristics) without forming an electric field.
  • data including at least one of video data and audio data of digital signage content distributed via the digital broadcast wave of the Internet or a broadcasting station is received, and the received digital signage content is converted into the light scattering property. It is preferable to display on at least one of a liquid crystal display panel and the image display panel.
  • the liquid crystal display system control method includes a first transparent substrate having a first electrode and disposed on the front side, and a second transparent substrate having a second electrode and disposed on the back side.
  • a transparent substrate and a light-scattering liquid crystal layer disposed between the first transparent substrate and the second transparent substrate so that the first electrode and the second electrode face each other;
  • a liquid crystal display system comprising: a light scattering liquid crystal display panel configured as described above; and an image display panel disposed on the back side of the light scattering liquid crystal display panel to form an image.
  • both the first electrode and the second electrode are provided at predetermined positions on the light scattering liquid crystal display panel.
  • Bright color display is performed by scattering external light with the liquid crystal layer in a light scattering state, and a light / dark image composed of a combination of the light color display and the dark color display is displayed on the liquid light scattering liquid crystal display panel.
  • the light-scattering liquid crystal layer of the light-scattering liquid crystal display panel is placed in a light-scattering state and a bright color is displayed at a predetermined position on the light-scattering liquid crystal display panel.
  • a dark color display performed in other places in a light transmissive state, an image composed of a combination of these bright and dark colors can be formed on the light scattering liquid crystal display panel, so that the image display panel is turned off. Even in the state, information can be displayed while saving power consumption.
  • FIG. 1 is an explanatory diagram of the entire liquid crystal display system 900 according to the present embodiment.
  • the liquid crystal display panel 100 is used as the image display panel.
  • a liquid crystal display system 900 includes a liquid crystal display panel 100 that displays an image during normal use, a backlight 300 that irradiates illumination light to the back side of the liquid crystal display panel 100, and the liquid crystal display panel 100.
  • Backlight control for controlling an on / off state of a light scattering liquid crystal display panel 200 in which a light scattering liquid crystal layer is sandwiched between substrates, a liquid crystal control unit 500, and a backlight 300, which display an image when not in use.
  • Part 501 The liquid crystal controller 500 controls the liquid crystal state of the liquid crystal display panel 100 and the light scattering liquid crystal display panel 200.
  • the backlight control unit 501 turns on the backlight 300 in the first state, and turns off the backlight 300 in the second state.
  • FIG. 2 is a cross-sectional view of the liquid crystal display system 900 according to the present embodiment.
  • the light-scattering liquid crystal display panel 200 is, for example, an active matrix liquid crystal display panel, and is opposed to the first transparent substrate 11 and the first transparent substrate 11 disposed on the front side. It has the 2nd transparent substrate 12 arrange
  • the 2nd transparent substrate 12 arrange
  • the memory liquid crystal of the memory liquid crystal layer 36 is not particularly limited.
  • a ferroelectric liquid crystal or a cholesteric liquid crystal having excellent memory characteristics can be used.
  • a counter electrode 25 is formed as a first electrode on the inner side of the first transparent substrate 11, that is, the back surface, and a pixel electrode 23 is formed as a second electrode on the inner side, that is, the front surface of the second transparent substrate 12. Is done.
  • the counter electrode 25 is given a predetermined counter potential from an external drive circuit (not shown).
  • a liquid crystal display panel 100 is disposed on the back side of the light scattering liquid crystal display panel 200.
  • the liquid crystal display panel 100 is also an active matrix type liquid crystal display panel, for example, and includes a third transparent substrate 13 disposed on the front side and a fourth transparent substrate 14 disposed on the back side facing the third transparent substrate 13. And a liquid crystal layer 26 sandwiched between the third transparent substrate 13 and the fourth transparent substrate 14.
  • the third transparent substrate 13 of the liquid crystal display panel 100 and the second transparent substrate 12 of the light scattering liquid crystal display panel 200 are disposed to face each other.
  • the liquid crystal layer 26 is not particularly limited.
  • a TN (twistedistnematic) type, a GH (guest-host) type, an STN (super-twisted nematic) type, an SBE (super-twistedbirefringence effect) type, An ECB (electrically controlled birefringence) type or the like can be used.
  • a counter electrode 35 is formed as a third electrode on the inner side of the third transparent substrate 13, that is, the back surface, and a pixel electrode 33 is formed as a fourth electrode on the inner side, that is, the front surface of the fourth transparent substrate 14. Is done. A predetermined counter potential is applied to the counter electrode 35 from an external drive circuit (not shown). On the outside of the third transparent substrate 13 and the fourth transparent substrate 14, a normal absorption type upper polarizing plate 32 and a lower polarizing plate 31 arranged in crossed Nicols are formed.
  • substrate which has light transmittances such as a glass plate and a quartz plate, is used. can do.
  • the pixel electrodes 23 and 33 and the counter electrodes 25 and 35 are made of a light transmissive conductive material such as ITO (indium tin oxide).
  • the liquid crystal display panel 100 and the light-scattering liquid crystal display panel 200 are arranged with a predetermined interval through, for example, a spacer, but are not limited thereto, and the liquid crystal display panel 100 and the light-scattering liquid crystal display panel 200 are arranged.
  • the second transparent substrate 12 of the light-scattering liquid crystal display panel 200 and the third transparent substrate 13 of the liquid crystal display panel 100 can be disposed in close contact with each other.
  • a backlight 300 is disposed on the back side of the liquid crystal display panel 100.
  • the backlight 300 is formed with, for example, a plurality of light emitting units, and specifically is an illumination unit in which a plurality of fluorescent tubes are arranged, for example.
  • the plurality of fluorescent tubes constituting the backlight 300 are formed so as to extend over the entire width direction of the liquid crystal display panel 100, and almost the entire vertical direction of the liquid crystal display panel 100 along a plane parallel to the liquid crystal display panel 100. It is held by a lamp holder (not shown) in a state of being arranged over.
  • the fluorescent tube of the backlight 300 is not particularly limited, and for example, a cold cathode tube, a hot cathode tube, or the like can be used. Moreover, a light bulb can be used instead of a fluorescent tube.
  • the liquid crystal control unit 500 shown in FIG. 1 forms an image on the liquid crystal display panel 100 (first state)
  • an electric field is formed between the pixel electrode 23 and the counter electrode 25 to cause the memory liquid crystal layer 36 to light.
  • the transmissive state the image formed on the liquid crystal display panel 100 is transmitted through the memory liquid crystal layer 36 and displayed on the light scattering liquid crystal display panel 200.
  • the liquid crystal control unit 500 uses the pixel electrode 23 and the counter electrode 25 at predetermined positions on the light-scattering liquid crystal display panel 200.
  • An electric field is formed between the two electrodes to make the memory liquid crystal layer 36 in a light-transmitting state and display a dark color, and at other locations on the light-scattering liquid crystal display panel 200, an electric field is not formed between the two electrodes.
  • the liquid crystal layer 36 is in a light scattering state to scatter outside light, thereby performing bright color display, and displaying a bright and dark image composed of a combination of the bright color display and the dark color display on the light scattering liquid crystal display panel 200.
  • the liquid crystal control unit 500 puts the liquid crystal layer 26 of the liquid crystal display panel 100 into a light non-transmissive state in order to prevent light from the back side of the liquid crystal display panel 100 from passing through the liquid crystal layer 26.
  • the configuration of the liquid crystal display system 900 is not limited to the configuration including four transparent substrates, and as shown in FIG. 3, the third transparent substrate of the image display panel 100 and the light scattering.
  • the second transparent substrate of the liquid crystal display panel 200 can also be configured as one common transparent substrate 15.
  • the pixel electrode 23 is formed on the front surface of the common transparent substrate 15, and the counter electrode 35 is formed on the rear surface of the common transparent substrate 15. Is formed. According to this configuration, it is possible to prevent a decrease in light transmittance due to the overlapping of a plurality of transparent substrates, and it is possible to reduce the thickness of the liquid crystal display system. Can match.
  • FIG. 4 is an active matrix circuit configuration diagram of the light-scattering liquid crystal display panel 200.
  • the light scattering liquid crystal display panel 200 includes a display unit 90 in which a plurality of display pixels 80 are formed, a scanning line driving circuit 110, and a signal line driving circuit 120.
  • the scanning line driving circuit 110 and the signal line driving circuit 120 are formed integrally with the signal line 21, the scanning line 22, and the pixel electrode 23 on the second transparent substrate 12.
  • a plurality of scanning lines 22 and a plurality of signal lines 21 intersecting with the scanning lines 22 are arranged on the second transparent substrate 12 in a matrix shape via an insulating film (not shown).
  • display pixels 80 are arranged at each intersection of the scanning lines 22.
  • the display pixel 80 includes a pixel electrode 23, a thin film transistor (TFT) 24, a counter electrode 25, and a memory liquid crystal layer 36.
  • the source of the thin film transistor 24 is connected to the signal line 21, the gate is connected to the scanning line 22, and the drain is connected to the pixel electrode 23.
  • the scanning line driving circuit 110 includes a buffer circuit, a shift register 111, and the like (not shown), and sequentially outputs scanning signals to the scanning line 22 based on a control signal supplied from an external driving circuit (not shown). I will do it. For example, when a moving image such as a clock display is displayed on the light-scattering liquid crystal display panel 200, the scanning line driving circuit 110 sets the control signal line 30 to the off level, and sequentially in the same manner as in a normal active matrix liquid crystal display panel. A scanning signal is output to the scanning line 22. On the other hand, when displaying still images such as various weather marks such as sunny, rain, snow, etc. on the light-scattering liquid crystal display panel 200, for example, the scanning line 22 is turned off and the control signal line 30 is turned on. Level.
  • the signal line driving circuit 120 includes an analog switch 122, a shift register 121, and the like, and a video signal is supplied from an external driving circuit (not shown) through a control signal and a video bus 123.
  • the signal line driver circuit 120 samples the video signal supplied from the video bus 123 on the signal line 21 at a predetermined timing by supplying an open / close signal of the analog switch 122 from the shift register 121.
  • the active matrix circuit configuration of the liquid crystal display panel 100 is formed in the same manner as the active matrix circuit configuration of the light scattering liquid crystal display panel 200 described above. That is, the display unit includes a display unit in which a plurality of display pixels are formed, a scanning line driving circuit, and a signal line driving circuit.
  • the scanning line driving circuit and the signal line driving circuit are arranged on the fourth transparent substrate 14.
  • the signal line, the scanning line, and the pixel electrode 33 are integrally formed.
  • a plurality of scanning lines and a plurality of signal lines intersecting with the scanning lines are arranged in a matrix shape through an insulating film, and display pixels are arranged at the intersections of the signal lines and the scanning lines. Are arranged, and the display unit is configured by including the display pixels.
  • the display pixel includes a pixel electrode 33, a thin film transistor, a counter electrode 35, and a liquid crystal layer 26.
  • the source of the thin film transistor is connected to the signal line, the gate is connected to the scanning line, and the drain is connected to the pixel electrode.
  • FIG. 5A to 5F are schematic views of the manufacturing process of the liquid crystal display system 900.
  • FIG. 5A an amorphous silicon thin film 71 is deposited on a second transparent substrate 12 such as glass by a plasma CVD method, and this amorphous silicon thin film 71 is annealed by a laser device to be polycrystallized.
  • the laser beam 72 from the laser device is scanned in the direction of the arrow in the drawing, and the region irradiated with the laser beam 72 is crystallized to become a polycrystalline silicon film 73.
  • FIG. 5A an amorphous silicon thin film 71 is deposited on a second transparent substrate 12 such as glass by a plasma CVD method, and this amorphous silicon thin film 71 is annealed by a laser device to be polycrystallized.
  • the laser beam 72 from the laser device is scanned in the direction of the arrow in the drawing, and the region irradiated with the laser beam 72 is crystallized to become a polycrystalline
  • the polycrystalline silicon film 73 is patterned by photolithography to form an active layer 74 of the thin film transistor.
  • a gate insulating film 75 made of a silicon oxide film is formed by plasma CVD, and then a Mo—W alloy film is formed by sputtering and patterned to form a gate electrode 76. Scan lines are also formed simultaneously during patterning.
  • impurities are implanted by ion doping using the gate electrode 76 as a mask to form a source / drain region 78 of the thin film transistor.
  • a first interlayer insulating film 77 made of a silicon oxide film is formed on the gate electrode 76 by plasma CVD.
  • FIG. 5E after forming contact holes in the first interlayer insulating film 77 and the gate insulating film 75, an aluminum film is formed by sputtering and patterned to form source / drain electrodes 79. At this time, a signal line is also formed.
  • FIG. 5F a second interlayer insulating film 83 is formed on the aluminum film. Then, a contact hole is formed in the second interlayer insulating film 83, and a pixel electrode 23 is further formed.
  • gate electrodes, source / drain electrodes, scanning lines, and signal lines are formed on the front side, and a counter electrode 25 is formed on the back side by sputtering or the like.
  • a first transparent substrate is prepared.
  • the first transparent substrate 11 and the second transparent substrate 12 are opposed to each other, the periphery is sealed with a sealing material 29, the composition of the memory liquid crystal layer 36 is injected therein, and the light scattering liquid crystal is sealed therein.
  • a display panel 200 is formed.
  • the third transparent substrate 13 and the fourth transparent substrate 14 are opposed to each other, the periphery is sealed with a sealing material 39, and the liquid crystal layer is contained inside.
  • the liquid crystal display panel 100 is formed by injecting and sealing 26 compositions.
  • the liquid crystal display system 900 is manufactured by arranging the second transparent substrate 12 of the light-scattering liquid crystal display panel 200 and the third transparent substrate 13 of the liquid crystal display panel 100 to face each other.
  • FIG. 6 is a block diagram of a digital signage system 400 via the Internet.
  • the digital signage system 400 includes a digital signage device 410 in which the liquid crystal display system 900 according to the present invention is used as a display device, and a dedicated server device 421 connected via the Internet 420. Configured.
  • the electronic signboard device 410 is a device that is installed at an entrance of a store or a company and displays contents such as advertisements and information for employees.
  • the communication circuit control unit 411 connects the electronic signboard device 410 to the server device 421 via the Internet 420.
  • the provided content is automatically distributed from the server device 421, or a predetermined URL is input from the URL memory 414 by operating the electronic signage device 410, or manually input from the operation unit 415, and the dedicated server device Connect to 421 to receive content.
  • the received content data is stored in the received data memory 412 in a temporary drop.
  • the browser memory 413 stores browser software that generates predetermined display screen contents from the received content.
  • the operation unit 415 is operated to select and read necessary content from the reception data memory 412, and a display screen signal is generated from the content data and displayed on the liquid crystal display system 900.
  • FIG. 7A and 7B are cross-sectional views illustrating a usage mode of the liquid crystal display system 900.
  • FIG. 7A shows a normal display mode (first state) for forming an image on the liquid crystal display panel 100
  • FIG. 7B shows a display mode (second state) for forming an image on the light-scattering liquid crystal display panel 200. .
  • the liquid crystal control unit 500 when displaying the content distributed from the server device 421 on the liquid crystal display panel 100 of the liquid crystal display system 900, the liquid crystal control unit 500 applies a voltage between the pixel electrode 23 and the counter electrode 25. When applied, the liquid crystal molecules 38 in the memory liquid crystal layer 36 are brought into an aligned state, thereby changing the memory liquid crystal layer 36 of the light-scattering liquid crystal display panel 200 to a light transmissive state.
  • the backlight control unit 501 turns on the backlight 300. As a result, the content displayed on the liquid crystal display panel 100 passes through the light scattering liquid crystal display panel 200 and is recognized by the customer.
  • the liquid crystal control unit 500 causes the light scattering liquid crystal display panel 200 to
  • the liquid crystal molecules 38 in the memory liquid crystal layer 36 are set in a random state without forming an electric field between the pixel electrode 23 and the counter electrode 25 at a predetermined location, and the memory liquid crystal layer 36 of the light-scattering liquid crystal display panel 200 is changed to a light scattering state.
  • bright light display for example, white display W
  • white display W is performed at a predetermined position on the light-scattering liquid crystal display panel 200 by scattering external light.
  • a voltage is applied between the pixel electrode 23 and the counter electrode 25 to align the liquid crystal molecules 38 in the memory liquid crystal layer 36.
  • a dark color display (for example, black display B) is performed on the light scattering liquid crystal display panel 200 by changing the memory liquid crystal layer 36 to an aligned state and a light transmitting state.
  • the liquid crystal control unit 500 puts the liquid crystal layer 26 of the liquid crystal display panel 100 into a light non-transmissive state.
  • the backlight control unit 501 turns off the backlight 300.
  • an image composed of a combination of the light color display and the dark color display is formed on the light scattering liquid crystal display panel 200.
  • the images that can be displayed on the light-scattering liquid crystal display panel 200 are letters, numbers, symbols, figures, or a combination thereof.
  • Embodiment 2 In Embodiment 1 described above, when the liquid crystal display panel 100 is not used, the backlight 300 is turned off and an image composed of a combination of bright color display and dark color display is displayed on the light scattering liquid crystal display panel 200.
  • the present invention is not limited to such an embodiment.
  • the backlight control unit 501 when the liquid crystal display panel 100 is not used (second state), the backlight control unit 501 does not turn off the backlight 300, but uniformly turns on the whole in a low power consumption state. .
  • the backlight control unit 501 can turn on a part of the light emitting unit and turn off the other part.
  • an image composed of a combination of bright color display and dark color display can be displayed on the light scattering liquid crystal display panel 200 while saving power consumption.
  • FIG. 8 is a diagram for explaining a display form in which the backlight 300 corresponding to the place where the dark color display is formed is turned off and the backlight 300 is turned on at the position corresponding to the place where the bright color display is formed.
  • the liquid crystal display system 900 is configured with the three transparent substrates shown in FIG. 3 will be described as an example. As shown in FIG.
  • the backlight control unit 501 turns off the light emitting unit of the backlight 300 corresponding to the location where the dark color display (for example, black display B) is formed on the light scattering liquid crystal display panel 200, On the other hand, the light emitting part of the backlight 300 corresponding to the place where the bright color display (for example, white display W) is formed on the light scattering liquid crystal display panel 200 is turned on.
  • the liquid crystal controller 500 keeps the liquid crystal layer 26 of the liquid crystal display panel 100 in a light transmissive state.
  • the liquid crystal molecules 38 in the memory liquid crystal layer 36 are changed to a random state, and the memory liquid crystal layer 36 is changed to a light scattering state, thereby Even if the light color display is performed by scattering the light, the intensity of the scattered light is lowered and the light color display may be weakened. Therefore, by turning on the light emitting portion of the backlight 300 corresponding to the place where the bright color display is formed, the light of the backlight 300 is scattered by the liquid crystal molecules 38 in the random state, and scattered light is generated. Thus, the contrast between the light color display and the dark color display can be enhanced by supplementing the light color display.
  • FIG. 9 is a diagram for explaining a liquid crystal display system 900 in which a color filter layer is formed on the back inner side of the first transparent substrate 11.
  • the color filter layer is formed of R (red) 51, G (green) 52, and B (blue) 53, and the black matrix BM is divided into the third transparent substrate 13 so as to partition each pixel.
  • R (red) 51, G (green) 52, and B (blue) 53 are formed between the black matrixes BM.
  • R (red) 51, G (green) 52, and B (blue) 53 are formed using a photosensitive colored resist, and the arrangement is a stripe pattern.
  • no color filter layer is formed inside the back surface of the common transparent substrate 15. This is because if the color filter layer is also formed inside the back surface of the common transparent substrate 15, the light transmittance is deteriorated and the transparency is lowered.
  • a black matrix is provided inside the common transparent substrate 15 so as to partition each pixel, and R (red), G (green), and B (blue) are provided between the black matrices. ) Can also be formed. In such a case, a color filter is not formed inside the fourth transparent substrate 14 in order to prevent the light transmittance from being lowered.
  • the color filter layer is formed inside the first transparent substrate, and the color filter layer is formed inside the back surface of the third transparent substrate 13. Is not formed. It is also possible to form the color filter layer inside the front surface of the second transparent substrate and not form the color filter layer inside the front surface of the fourth transparent substrate 14.
  • Embodiment 5 In Embodiment 4 described above, the color filter layer having a different color for each pixel is formed. However, when performing color display, the present invention is not limited to such an embodiment.
  • color display is performed by mixing a dye into the memory liquid crystal layer 36.
  • FIG. 10A shows a case where the emitted light of the mixed dye is absorbed
  • FIG. 10B shows a case where the emitted light of the mixed dye is irradiated to the outside.
  • the liquid crystal display system 900 is configured with the three transparent substrates shown in FIG. 3 will be described as an example.
  • the mixed dye is, for example, a green dye
  • the green light 160 when no electric field is formed on the memory liquid crystal layer 36, the green light 160 is absorbed by the green dye mixed in the liquid crystal molecules as shown in FIG. 10A. Although not emitted in the viewing direction, the emitted light 161 other than the green light is not absorbed by the green dye, but is scattered by the green dye mixed in the liquid crystal molecules, so that a display with an enlarged viewing angle can be obtained.
  • the green light 160 is emitted without being absorbed by the pigment, and the emitted light 161 other than the green light is also mixed into the liquid crystal molecules. Since the green pigment is scattered and emitted without being absorbed, all incident light is emitted and becomes white light.
  • color display can be performed by mixing red, green, and blue primary color pigments for each pixel.
  • FIG. 11A and FIG. 11B are diagrams for explaining an embodiment in which the viewing angle dependency is made variable while an image is displayed on the light-scattering liquid crystal display panel 200.
  • FIG. 11A shows a case where display with little visual dependency is performed
  • FIG. 11B shows a case where display with high visual dependency is performed.
  • the liquid crystal display system 900 is configured with the three transparent substrates shown in FIG. 3 will be described as an example.
  • an electric field is formed with respect to the memory liquid crystal layer 36 in the case of performing display with a high visual dependence (when displaying with a narrow viewing angle). Since the liquid crystal molecules are aligned substantially parallel to the electric field by the applied electric field, the emitted light is emitted as it is without being scattered by the liquid crystal molecules. Therefore, for example, in the case where the liquid crystal display system 900 according to the present embodiment is used as a digital signage display device, when displaying to a small number of customers, it is advantageous because the luminance and contrast ratio can be increased. .
  • the external light applied to the display unit 90 of the light-scattering liquid crystal display panel 200 may have different intensity depending on the region. In such a case, it is difficult to provide a good display. For example, in some areas of the display unit 90, since the intensity of external light is high, bright color display due to external light scattering is emphasized, while in other areas, bright color display due to external light scattering is normal. There is. Therefore, in the seventh embodiment, a plurality of optical sensors are arranged in the display unit 90, the intensity of external light in the display unit 90 is detected for each predetermined region, and the external light irradiation state is determined based on the detection result. Good display.
  • FIG. 12 is a block diagram of a configuration in which a plurality of optical sensors are arranged in the display unit 90 of the light-scattering liquid crystal display panel 200.
  • the display unit 90 is provided with an optical sensor 180 for each predetermined region, and the intensity of external light irradiated on the display unit 90 can be detected for each predetermined region.
  • a total of x.times.y lights in each of the x.times.y regions obtained by dividing the horizontal direction (horizontal direction) of the display unit 90 into x pieces and dividing the vertical direction (vertical direction) into y pieces.
  • a sensor 180 is provided.
  • one optical sensor 180 is provided for each pixel formation portion, and the optical sensor 180 is provided for each region corresponding to one pixel in the display unit 90.
  • the image correction unit 510 corrects the image displayed on the display unit 90 according to the distribution of the intensity of external light on the display unit 90 based on the detection result by the optical sensor 180.
  • a data signal representing an image to be displayed is given to the liquid crystal display unit 500 as an input signal from the outside.
  • Detection values indicating external light intensity obtained by the optical sensor 180 in each region of the display unit 90 are input to the image correction unit 510.
  • the image correction unit 510 corrects the image signal corresponding to the data signal from the outside based on the detected value of the external light intensity. That is, in a region where the intensity of external light is high, the liquid crystal molecules 38 in the memory liquid crystal layer 36 are changed from a random state to a slightly light-transmitting alignment state.
  • the slight alignment in the light transmission state means that the light transmittance when the liquid crystal molecules are in a random state is T 1 %, and the light transmission alignment state is T 2 % (where T 2 > T 1 ), although not particularly limited, for example, the transmittance is [T 1 +0.2 (T 2 ⁇ T 1 )]% to [T 1 +0.4 (T 2 ⁇ T 1 )]. %.
  • the liquid crystal molecules 38 are aligned in a slight light transmission state even in a region where the intensity of the external light is high, so that the color is slightly dark and the bright color display can be prevented from being emphasized. Therefore, even if the external light intensity varies depending on the position on the display unit 90, the customer can visually recognize an image in which the original contrast is maintained on the entire screen.
  • a plurality of optical sensors 180 are arranged in the display unit 90 to detect the intensity of external light in the display unit 90 for each predetermined region, and in a region where the external light intensity is high, the liquid crystal molecules 38. was changed so as to be oriented from a random state to a slightly light transmissive state, thereby suppressing the emphasis of bright color display and visually recognizing an image maintaining the original contrast.
  • the scope of the present invention is not limited to such an embodiment. For example, in some areas of the display unit 90, since the intensity of external light is low, the bright color display due to scattered light may be weakened.
  • a plurality of photosensors 180 are arranged in the display unit 90 of the liquid crystal display panel 100, and in each region of the display unit 90, the external light intensity is obtained by the photosensor 180.
  • control is performed so that the light emitting unit of the backlight 300 corresponding to the region is turned on.
  • the liquid crystal controller 500 keeps the liquid crystal layer 26 of the liquid crystal display panel 100 in a light transmissive state. Thereby, the light of the backlight 300 is scattered by the liquid crystal molecules 38 in a random state to generate scattered light. Therefore, the contrast between the bright display and the dark display can be enhanced by supplementing the bright display.
  • FIG. 13 is an explanatory diagram of a liquid crystal display panel system 900 in which the reflector plate 40 is formed.
  • the reflecting mirror plate 40 is formed in a region that is not a region for forming a light transmission state in the memory liquid crystal layer 36 of the light-scattering liquid crystal display panel 200.
  • the region that is not the region that forms the light transmission state is a region that does not contribute to the light transmission state, and is not particularly limited, but is, for example, the upper portion of the wiring on the pixel.
  • the black matrix BM does not transmit light and does not contribute to the light transmission state
  • the region immediately below the black matrix BM is a region that is not a region that forms a light transmission state.
  • the reflecting mirror plate 40 is disposed in a region directly below the black matrix BM and inside the front surface of the common transparent substrate 15.
  • the liquid crystal controller 500 brings the liquid crystal layer 26 of the liquid crystal display panel 100 into a light non-transmissive state.
  • the backlight control unit 501 turns off the backlight 300.
  • the liquid crystal molecules 38 in the memory liquid crystal layer 36 are set in a random state, and the memory liquid crystal layer 36 of the light-scattering liquid crystal display panel 200 is changed into a light scattering state.
  • light color display for example, white display W
  • the incident light 164 that has entered the vicinity of the pixel electrode 23 without being scattered by the liquid crystal molecules 38 is reflected by the reflecting mirror plate 40 and is scattered by the liquid crystal molecules 38, thereby performing bright color display.
  • the incident light 162 is incident on the light-transmitting memory liquid crystal layer 36 and is not reflected, resulting in dark color display (for example, black display B). Thereby, even when the intensity of external light is low, it is possible to enhance the bright color display and maintain the contrast ratio of the image.
  • the liquid crystal display panel 100 is used as the image display panel.
  • the present invention is not limited to such an embodiment, and examples of the image display panel include an organic EL display panel and an inorganic display panel.
  • the usage example of the liquid crystal display system 900 according to the above embodiment is not limited to digital signage.
  • the liquid crystal display system according to the present invention can display an image with low power consumption even when the image display panel is turned off, the liquid crystal display system is suitably used for advertisement display such as digital signage.

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Abstract

L'invention concerne un système d'affichage à cristaux liquides qui peut afficher des informations même quand le panneau d'affichage d'image est à l'arrêt. Ce système comprend : un panneau d'affichage à cristaux liquides (100) ; et un panneau d'affichage à cristaux liquides diffusant la lumière (200) comprenant une couche de cristaux liquides à mémoire (36) entre des électrodes. Lorsque le panneau d'affichage à cristaux liquides (100) est utilisé, la couche de cristaux liquides à mémoire (36) dans le panneau d'affichage à cristaux liquides diffusant la lumière (200) passe à un état de transmission de la lumière. En revanche, lorsque le panneau d'affichage à cristaux liquides (100) n'est pas utilisé, des couleurs claires sont affichées en formant des pixels à l'état de diffusion de la lumière en des positions prédéterminées de la couche de cristaux liquides à mémoire (36), et des couleurs sombres sont affichées en formant des pixels à l'état de transmission de la lumière en d'autres positions de la couche de cristaux liquides à mémoire (36), formant ainsi sur le panneau d'affichage à cristaux liquides diffusant la lumière une image comprenant une combinaison desdites couleurs claires et desdites couleurs sombres.
PCT/JP2011/002709 2010-07-08 2011-05-16 Système d'affichage à cristaux liquides et procédé de commande d'un système d'affichage à cristaux liquides WO2012004922A1 (fr)

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CN113093413B (zh) * 2019-12-23 2023-11-24 松下电器（美国）知识产权公司 视角控制单元及具有该视角控制单元的显示装置
CN113377077A (zh) * 2021-07-08 2021-09-10 刘志程 一种智能制造数字化工厂系统
CN115836245A (zh) * 2021-07-08 2023-03-21 华为技术有限公司 双面显示器、显示装置、汽车及交互方法

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