WO2012144471A1 - Dispositif d'affichage et procédé de commande - Google Patents

Dispositif d'affichage et procédé de commande Download PDF

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Publication number
WO2012144471A1
WO2012144471A1 PCT/JP2012/060291 JP2012060291W WO2012144471A1 WO 2012144471 A1 WO2012144471 A1 WO 2012144471A1 JP 2012060291 W JP2012060291 W JP 2012060291W WO 2012144471 A1 WO2012144471 A1 WO 2012144471A1
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WO
WIPO (PCT)
Prior art keywords
viewing angle
light
angle characteristic
unit
display
Prior art date
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PCT/JP2012/060291
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English (en)
Japanese (ja)
Inventor
圭 及部
清志 中川
滋規 田中
良信 平山
柳　俊洋
Original Assignee
シャープ株式会社
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Publication of WO2012144471A1 publication Critical patent/WO2012144471A1/fr

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    • 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
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/33—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving directional light or back-light sources
    • 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
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • 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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment

Definitions

  • the present invention relates to a display device including a backlight unit and a control method thereof.
  • Patent Document 1 An example of a display device including a display unit that switches a plurality of types of viewing angle characteristics is disclosed in Patent Document 1.
  • the backlight unit includes a first light source that is disposed at an end of the first light guide plate and emits light into the first light guide plate, and an end of the second light guide plate. And a second light source that emits light into the second light guide plate.
  • JP 2008-123925 A (published May 29, 2008)
  • the dual view mode is a mode for simultaneously displaying two images that can be viewed from the sides (right side and left side) of the screen.
  • the mono view mode (also referred to as a single view mode) is a mode for displaying a single image that is assumed to be viewed from the front direction of the screen.
  • 14 (a) and 14 (b) are diagrams for explaining the problems of the prior art.
  • the user switches from the dual view mode to the mono view mode, the user is viewing the screen from the front of the screen shown in FIG.
  • the lighting mode of the backlight unit is still suitable for the dual view mode, the amount of light emitted in the front direction of the screen is small as shown in FIG. The problem of poor visibility arises.
  • the same problem occurs when switching from the mono view mode to the dual view mode. If the lighting mode of the backlight unit remains in a mode suitable for the mono view mode, the amount of light emitted in the front direction of the screen is large, but when viewed from the side (right side or left side) of the screen, the screen Is dark and visibility is poor.
  • Patent Document 1 does not disclose a technical idea of interlocking switching of two types of light sources and switching of viewing angle characteristics by controlling a member that changes viewing angle characteristics.
  • the present invention has been made to solve the above-described problems, and its purpose is to switch the lighting mode of the backlight unit to one suitable for the switched viewing angle characteristic in accordance with the switching of the viewing angle characteristic. It is to provide a display device that can be used.
  • a display device provides A display unit having a viewing angle characteristic changing member for switching a plurality of types of viewing angle characteristics; A backlight unit that can be lit in multiple lighting styles and illuminates the display section from the back, A lighting control unit that switches the lighting mode of the backlight unit to a lighting mode suitable for the switched viewing angle characteristic in accordance with the switching of the viewing angle characteristic by the viewing angle characteristic changing member is provided.
  • a control method provides A display unit having a viewing angle characteristic changing member for switching a plurality of types of viewing angle characteristics; A control method of a display device that can be lit in a plurality of types of lighting, and includes a backlight unit that illuminates the display unit from the back, A viewing angle characteristic switching step of switching the viewing angle characteristic by the viewing angle characteristic changing member; A lighting control step of switching the lighting mode of the backlight unit to a lighting mode suitable for the viewing angle characteristic switched in the viewing angle characteristic switching step.
  • the display unit includes the viewing angle characteristic changing member, and a plurality of types of viewing angle characteristics can be switched by the viewing angle characteristic changing member.
  • This switching may be performed according to a user instruction, may be performed according to an input image, and the trigger for the switching is not particularly limited.
  • the backlight unit emits light for illuminating the display unit from the back surface of the display unit (referred to as backlight light). By irradiating this backlight light, the visibility of the display portion can be enhanced.
  • This backlight unit can be lit in a plurality of types of lighting.
  • the lighting control unit switches the lighting mode of the backlight unit to a lighting mode suitable for the switched viewing angle characteristic in accordance with the switching of the viewing angle characteristic by the viewing angle characteristic changing member.
  • the display device is A display unit having a viewing angle characteristic changing member for switching a plurality of types of viewing angle characteristics; A backlight unit that can be lit in multiple lighting styles and illuminates the display section from the back, A lighting control unit that switches the lighting mode of the backlight unit to a lighting mode suitable for the switched viewing angle characteristic in accordance with the switching of the viewing angle characteristic by the viewing angle characteristic changing member.
  • the control method includes: A display unit having a viewing angle characteristic changing member for switching a plurality of types of viewing angle characteristics; A control method of a display device that can be lit in a plurality of types of lighting, and includes a backlight unit that illuminates the display unit from the back, A viewing angle characteristic switching step of switching the viewing angle characteristic by the viewing angle characteristic changing member; A lighting control step of switching the lighting mode of the backlight unit to a lighting mode suitable for the viewing angle characteristic switched in the viewing angle characteristic switching step.
  • FIG. 1 It is a figure which shows the structure of the display apparatus which concerns on one Embodiment of this invention.
  • (A) is a figure which shows the lighting mode of the backlight unit in mono view mode
  • (b) is a figure which shows the directivity of the backlight light in mono view mode.
  • (A) is a figure which shows the lighting style of the backlight unit in dual view mode
  • (b) is a figure which shows the directivity of the backlight light in dual view mode.
  • (A) is a figure which shows the state in which the spatial light modulator 1 is set to ON in dual view mode
  • (b) is a graph which shows the directivity of the backlight light in dual view mode
  • (c) is a figure which shows the state in which the spatial light modulator 1 is OFF in mono view mode
  • (d) is a graph which shows the directivity of the backlight light in mono view mode.
  • (A) is a figure which shows the state in which the spatial light modulator 1 is set to ON in triple view mode
  • (b) is a graph which shows the directivity of the backlight light in triple view mode
  • (c) is a figure which shows the state which the spatial light modulator 1 is OFF in mono view mode
  • (d) is a graph which shows the directivity of the backlight light in mono view mode. It is a figure which shows the method of ON / OFF control of the spatial light modulator 1 in 2D display and 3D display.
  • (A) is a figure which shows the state which the spatial light modulator 1 is set to ON in 3D display
  • (b) is a graph which shows the directivity of the backlight light in 3D display
  • (c) FIG.
  • FIG. 6 is a diagram showing a state in which the spatial light modulator 1 is turned off in 2D display
  • FIG. 4D is a graph showing directivity of backlight light in 2D display.
  • A is a figure which shows the state which the spatial light modulator 1 is ON in a narrow viewing angle state
  • (b) is a graph which shows the directivity of the backlight light in a narrow viewing angle state
  • (C) is a figure which shows the state which the spatial light modulator 1 is OFF in a wide viewing angle state
  • (d) is a graph which shows the directivity of the backlight light in a wide viewing angle state. is there.
  • FIGS. 9A to 9D are diagrams showing a method of switching between a wide viewing angle state and a narrow viewing angle state different from the example shown in FIG.
  • (A) is a figure which shows the method of forming a parallax barrier with a slide shutter
  • (b) is a figure which shows the method of forming a parallax barrier with a rotary shutter. It is a figure which shows the structure of the display apparatus which concerns on another embodiment of this invention.
  • (A) is a figure which shows the lighting style of the backlight unit in mono view mode
  • (b) is a figure which shows the lighting style of the backlight unit in dual view mode
  • (c) is a figure in mono view mode
  • FIG. 4D is a diagram showing the directivity of backlight light in the dual view mode.
  • FIG. 1 It is a flowchart which shows an example of the flow of a process in the said display apparatus.
  • A is a figure which shows the state which is visually recognizing the said screen from the front of a screen after switching from dual view mode to mono view mode in the conventional display apparatus
  • (b) is a figure of (a). It is a graph which shows the directivity of the backlight light in a state.
  • FIG. 1 is a diagram showing a configuration of a display device 100 according to an embodiment of the present invention.
  • the display device 100 is a liquid crystal display device capable of switching between a dual view mode and a mono view mode.
  • the display device of the present invention is not limited to a liquid crystal display device, and may be other types of display devices such as an organic EL (electro-luminescence) display device.
  • the display device 100 may switch between two-dimensional display and three-dimensional display, and may switch the viewing angle.
  • a display device 100 includes a spatial light modulator (viewing angle characteristic changing member) 1, a liquid crystal display panel 2, an optical sheet 3, a first backlight unit 4, a second backlight unit 5, and a reflector. 6, a spatial light modulator control unit 7, a light source switching drive circuit (lighting control unit) 8, and an input unit (instruction receiving unit) 9.
  • a display unit 20 is configured by the spatial light modulator 1 and the liquid crystal display panel 2.
  • backlight light light emitted from the first backlight unit 4 or the second backlight unit 5 is referred to as backlight light in order to distinguish it from the backlight unit itself.
  • the liquid crystal display panel 2 is a liquid crystal panel in which a plurality of pixels 2a are arranged in a matrix, and displays an image indicated by a video signal input from the outside.
  • the liquid crystal display panel 2 is a display panel capable of switching between a mono view mode (first display mode) and a dual view mode (second display mode).
  • the mono view mode is a normal display mode for displaying a single image, and is a mode assuming that the liquid crystal display panel 2 (screen) is viewed from the front.
  • the dual view mode is a mode in which two images (right image and left image) that can be viewed from two directions (right side and left side of the screen) are simultaneously displayed on the liquid crystal display panel 2.
  • the right image can be viewed only from the right side of the screen, and the left image can be viewed only from the left side of the screen.
  • the spatial light modulator 1 is provided on the front surface (the image display side) of the liquid crystal display panel 2.
  • the liquid crystal display panel 2 includes a polarizing plate and a TFT (thin film transistor) substrate in order to realize a function as a liquid crystal display panel.
  • TFT thin film transistor
  • the spatial light modulator 1 is a viewing angle characteristic changing member that switches a plurality of types of viewing angle characteristics, and is a parallax barrier (parallax barrier) that switches between the viewing angle characteristic that realizes the mono-view mode and the viewing angle characteristic that realizes the dual view mode. ).
  • the spatial light modulator 1 is a liquid crystal layer that forms a light transmission region and a light blocking region in a stripe shape.
  • a non-hatched portion is a transmission region
  • a hatched portion is a blocking region.
  • a plurality of blocking regions are formed or erased depending on the strength of the electric field applied to the liquid crystal layer.
  • a plurality of blocking areas perpendicular to the horizontal direction are caused to appear, and in the case of the mono view mode, the blocking areas are erased (light in all directions is transmitted).
  • the display device 100 displays a right image that can be seen only from the right side of the screen and a left image that can be seen only from the left side of the screen.
  • the spatial light modulator 1 It is also possible to display different images.
  • the state where the blocking area appears is expressed as the spatial light modulator 1 being ON, and the blocking area is erased (the parallax barrier is formed). No) state is expressed as the spatial light modulator 1 being OFF.
  • the optical sheet 3 is an optical sheet for adjusting the optical path of the backlight light (that is, the emission angle of the backlight light transmitted through the optical sheet 3).
  • the first backlight light includes the light emitted from the second backlight unit 5 together with the light emitted from the first backlight unit 4 and transmitted through the first backlight unit 4 to the optical sheet 3. included.
  • the directivity of the backlight light emitted from the first backlight unit 4 and the second backlight unit 5 can be adjusted by the optical sheet 3. As a result, the viewing angle of the liquid crystal display panel 2 can be adjusted.
  • the optical sheet 3 for example, a diffusion sheet, a microlens sheet or a prism sheet can be used.
  • the diffusion sheet is composed of a transparent resin as a base material (base material) and a light scattering agent (scattering fine particles) dispersed in the transparent resin.
  • the microlens sheet has a plurality of microlens rows formed on the light emitting surface side of the sheet base material.
  • a plurality of prism rows are formed on the light emitting surface side of the sheet base material. Of these, the prism sheet has a greater effect of increasing the front luminance.
  • having directivity means a state in which the luminance of light emitted from the light source varies depending on the direction, and the luminance intensity distribution is biased.
  • High directivity means a state where the light distribution angle is narrow and the range where the luminance per unit solid angle is high is limited to a narrow range.
  • a first backlight unit 4 and a second backlight unit 5 that illuminate the back surface are arranged on the back surface (the surface opposite to the image display side) of the liquid crystal display panel 2 in order to enhance the visibility of the image.
  • the first and second backlight units 4 and 5 irradiate the back surface of the liquid crystal display panel 2 with backlight light, and illuminate the image displayed on the liquid crystal display panel 2.
  • the first backlight unit 4 and the second backlight unit 5 realize a plurality of types of lighting modes by selecting or combining them.
  • these backlight units include a plurality of light sources, and realize a plurality of types of lighting modes in which the positions of the light sources to be turned on are different from each other. That is, the backlight unit included in the display device 100 realizes a plurality of types of lighting modes by lighting one or both of the first light source 41 and the second light source 51 described later.
  • the first backlight unit 4 and the second backlight unit 5 are independently controlled ON / OFF by the light source switching drive circuit 8.
  • the first backlight unit 4 is a surface-emitting type and has two directions different from the normal direction of the light-emitting surface (light emission surface) (that is, the front direction with respect to the screen) (that is, the right side with respect to the screen). And a lighting unit having a luminance peak in the left direction).
  • the first backlight unit 4 includes a plurality of first light sources 41 and a light guide plate (light guide portion) 42.
  • the first light source 41 is disposed on the side surface when the light emission surface 42 a of the light guide plate 42 is the upper surface, and emits light into the light guide plate 42. More specifically, the first light sources 41 are respectively provided at both ends of the light guide plate 42, and these first light sources 41 face each other with the optical axis of the emitted light directed toward the inside of the light guide plate 42. ing.
  • the first light source 41 is, for example, an LED (Light Emitting Diode), but an OLED (Organic light Emitting Diode), CCFT (Cold Cathode Fluorescent Tube), or a light source such as electroluminescence may be used.
  • the first light source 41 is assumed to be at least two independent LEDs.
  • the first light source 41 is a CCFT, a U-shaped fluorescent tube may be adopted, and the two first light sources 41 shown in FIG. 1 may be connected to each other as one fluorescent tube.
  • the light guide plate 42 propagates the light incident from the first light source 41 disposed at both ends of the light guide plate 42, and emits the light from the emission surface 42a toward the back surface of the liquid crystal display panel 2 as backlight light. It is.
  • the combination of the first light source 41 and the light guide plate 42 allows the light emitted from the first light source 41 to have directivity (output characteristics) inclined rightward and leftward with respect to the normal direction of the screen.
  • a synthetic resin having a high transmittance such as a methacrylic resin, an acrylic resin, a polycarbonate resin, a polyester resin, or a vinyl chloride resin can be used.
  • the shape of the light guide plate 42 is, for example, a rectangular plate shape, but the shape is not particularly limited.
  • the first light source 41 may be disposed on each of the four sides of the light guide plate 42 having a rectangular plate shape.
  • a plurality of light guide plates 42 may be arranged in parallel, and the first light sources 41 may be arranged at both ends of each light guide plate 42.
  • the second backlight unit 5 is a surface-emitting type, and is an illumination unit having a luminance peak in the normal direction of the light-emitting surface (light emission surface) (that is, the front direction with respect to the screen).
  • the second backlight unit 5 is disposed on the back side of the light guide plate 42 (on the side opposite to the emission surface 42a).
  • the second backlight unit 5 includes a plurality of second light sources 51 and a diffusion plate (diffusion member) 52.
  • the second light source 51 is disposed on the back side of the light guide plate 42 with the diffusion plate 52 interposed therebetween, and emits light to the back surface of the liquid crystal display panel 2 via the diffusion plate 52 and the light guide plate 42. More specifically, the second light source 51 is configured such that the optical axis of the emitted light is on the back surface of the liquid crystal display panel 2 on the light incident surface of the diffusion plate 52 (the surface opposite to the surface facing the light guide plate 42). It is arranged to face. Therefore, the light emitted from the second light source 51 has directivity in the front direction of the liquid crystal display panel 2.
  • the arrangement method of the second light source 51 is not particularly limited.
  • the second light source 51 is arranged in a matrix on the light incident surface side of the diffusion plate 52.
  • the second light source 51 is, for example, an LED, but a light source such as CCFT or electroluminescence may be used.
  • the diffusion plate 52 In the case where the second light source 51 is an LED, the directivity in the front direction is high, resulting in uneven brightness in which the vicinity of each second light source 51 is locally brightened.
  • the diffusion plate 52 eliminates the luminance unevenness by diffusing the light emitted from the plurality of second light sources 51.
  • the thickness of the diffusion plate 52 is about several millimeters.
  • the diffusion plate 52 is composed of, for example, a transparent resin as a base material and a light scattering agent dispersed in the transparent resin.
  • the transparent resin examples include polycarbonate resin, acrylic resin, fluorine acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methylstyrene resin, fluorene resin, polyethylene terephthalate (PET), and polypropylene.
  • An acrylonitrile styrene copolymer, an acrylonitrile polystyrene copolymer, or the like can be used.
  • the light scattering agent examples include fine particles made of oxides such as silica (SiO 2 ), alumina (Al 2 O 3 ), magnesium oxide (MgO), and titania, or fine particles such as calcium carbonate and barium sulfate. Can be used. Further, as the light scattering agent, particles made of a resin such as an acrylic resin or a styrene resin may be used.
  • the reflection plate 6 is disposed on the rear side of the second light source 51 and reflects light that has leaked from the light incident surface of the diffusion plate 52 and light that has not entered the diffusion plate 52.
  • the material of the reflecting plate 6 is not specifically limited, For example, polyester resin or polyolefin resin can be used.
  • the spatial light modulator control unit 7 controls ON / OFF of the spatial light modulator 1 in accordance with a user instruction input via the input unit 9. Specifically, when the user selects the dual view mode, the spatial light modulator 1 is turned on, and when the user selects the mono view mode, the spatial light modulator 1 is turned off. This control can be performed by adjusting the strength of the electric field applied to the spatial light modulator 1 which is a liquid crystal layer.
  • the spatial light modulator control unit 7 outputs to the light source switching drive circuit 8 a switching signal indicating which one is switched when the spatial light modulator 1 is switched on / off.
  • the light source switching drive circuit 8 changes the lighting mode of the first backlight unit 4 and the second backlight unit 5 to a lighting mode suitable for the switched viewing angle characteristic in accordance with the switching of the viewing angle characteristic by the spatial light modulator 1. Switch.
  • the first light source switching driving circuit 8 when the light source switching drive circuit 8 receives the switching signal output from the spatial light modulator control unit 7, the first light source switching driving circuit 8 performs the first lighting mode suitable for the mode indicated by the received switching signal.
  • the light source 41, the second light source 51, or both are turned on. Details of the lighting mode of the backlight unit will be described later.
  • the spatial light modulator control unit 7 is a lighting control unit that switches the lighting mode of the backlight. Can also be considered.
  • the input unit 9 receives a user's instruction to specify the viewing angle characteristic, and is a receiving unit that receives an operation signal from an operation button or a remote control, for example.
  • a user instruction input from the input unit 9 is output to the spatial light modulator control unit 7.
  • FIG. 2A is a diagram illustrating a lighting mode of the backlight unit in the mono view mode
  • FIG. 2B is a diagram illustrating directivity of the backlight light in the mono view mode.
  • the configuration of the display device 100 is simplified.
  • the second light source 51 is turned on and the first light source 41 is turned off. Since the light emitted from the second light source 51 has high directivity with respect to the front direction, the backlight light finally emitted from the liquid crystal display panel 2 is, as shown in FIG. It has a peak of luminance distribution. Therefore, it is possible to realize backlight light suitable for the mono view mode in which an image is viewed from the front of the screen (viewpoint A).
  • the graph shown in FIG. 2B is a graph in which the vertical axis represents the relative luminance of the backlight light (the luminance with the peak luminance set to 100) and the horizontal axis represents the viewing angle.
  • the backlight has a relative luminance peak at a viewing angle of 0 degree, which is an angle when the screen is viewed from the front, and a relative luminance is X at a viewing angle of ⁇ B. Yes.
  • FIG. 3A is a diagram showing the lighting mode of the backlight unit in the dual view mode
  • FIG. 3B is a diagram showing the directivity of the backlight light in the dual view mode.
  • the configuration of the display device 100 is simplified.
  • the first light source 41 is turned on and the second light source 51 is turned off.
  • the light emitted from the first light source 41 and propagated through the light guide plate 42 has a luminance distribution having two peaks that are inclined to the right and left sides of the normal direction of the screen. Therefore, the backlight light finally emitted from the liquid crystal display panel 2 has directivity in two different directions as shown in FIG. 3B (has a luminance distribution peak in two different directions). )
  • the first light source 41 is turned on, which is suitable for the dual view mode. Backlight can be realized.
  • the graph shown in FIG. 3B is a graph in which the vertical axis represents the relative luminance of the backlight light and the horizontal axis represents the viewing angle.
  • the backlight has luminance peaks in two directions inclined by a predetermined angle ( ⁇ A) from the normal direction of the screen. Further, the relative luminance between the valleys of the two peaks is X.
  • the display device 100 selectively turns on one of the first backlight unit 4 and the second backlight unit 5 to thereby turn on the lighting mode suitable for the mono view mode and the dual view mode. Switching between lighting styles.
  • the first backlight unit 4 and the second backlight unit 5 can each be regarded as one light source.
  • the display device 100 includes two types of light sources, namely, the first backlight unit 4 and the second backlight unit 5, which have different directivities of emitted light.
  • the light source switching drive circuit 8 switches the type of the light source to be turned on as the viewing angle characteristic of the liquid crystal display panel 2 is switched.
  • FIGS. 4A to 4D are diagrams showing the difference between the directivity of the backlight light in the dual view mode and the directivity in the mono view mode. More specifically, FIG. 4A is a diagram illustrating a state in which the spatial light modulator 1 is ON in the dual view mode. FIG. 4B is a graph showing the directivity of the backlight light in the dual view mode. FIG. 4C is a diagram illustrating a state in which the spatial light modulator 1 is turned off in the mono view mode. FIG. 4D is a graph showing the directivity of the backlight in the mono view mode.
  • the dual view mode in the dual view mode, a parallax barrier is formed by the spatial light modulator 1, and among the pixels of the liquid crystal display panel 2, the B pixel is shown in FIG. ) But can not be seen from the viewpoint C. Conversely, the C pixel can be seen from the viewpoint C, but cannot be seen from the viewpoint B.
  • the dual view mode can be realized by turning on the spatial light modulator 1.
  • the directivity of the backlight light in the dual view mode is shown in FIG.
  • the backlight has directivity in two different directions (right side and left side with respect to the screen). .
  • FIG. 4C is a diagram showing a state in which the spatial light modulator 1 is OFF in the mono view mode. As shown in FIG. 4C, in the mono view mode, no parallax barrier is formed, and any pixel of the liquid crystal display panel 2 can be viewed from any direction.
  • FIG. 4 shows the directivity of the backlight light in the mono view mode.
  • the backlight has directivity with respect to the front direction of the screen.
  • FIG. 5A to 5D are diagrams showing the difference between the directivity of the backlight light in the triple view mode and the directivity of the backlight light in the mono view mode. More specifically, FIG. 5A is a diagram illustrating a state in which the spatial light modulator 1 is turned on in the triple view mode. FIG. 5B is a graph showing the directivity of the backlight light in the triple view mode. FIG. 5C shows a state in which the spatial light modulator 1 is turned off in the mono view mode. FIG. 5D is a graph showing the directivity of the backlight light in the mono view mode.
  • the triple view mode is a first image ⁇ that can be viewed from the front of the screen, a second image ⁇ that can be viewed from the left side of the screen, and a third image that can be viewed from the right side of the screen.
  • ⁇ is simultaneously displayed on the same screen.
  • the backlight light has directivity in three different directions (front, right and left sides with respect to the screen). .
  • both the first light source 41 and the second light source 51 may be turned on.
  • the ratio of the amount of light between the first light source 41 and the second light source 51 the characteristics of the optical sheet 3, and the like, backlight light having directivity in three different directions can be realized.
  • an optical member such as an optical sheet, the straightness of light emitted from the second light source 51 is further increased, thereby narrowing the luminance distribution range in the front direction of the screen (sharpening the luminance peak). You may do it.
  • the angle from the viewing angle of 0 degree at which the relative luminance of the backlight light emitted from the first backlight unit 4 in the triple view mode reaches a peak may be larger than the angle in the dual view mode.
  • a third backlight unit may be further provided in order to realize backlight suitable for the triple view mode.
  • the third backlight unit is turned on in conjunction with switching between the mono view mode and the triple view mode, and is turned on in the triple view mode.
  • the spatial light modulator 1 may switch between viewing angle characteristics that realize two-dimensional image display and viewing angle characteristics that realize three-dimensional image display.
  • FIG. 6 is a diagram showing a method of ON / OFF control of the spatial light modulator 1 in 2D display and 3D display.
  • a parallax barrier is formed by the spatial light modulator 1, and transmission of the parallax barrier is performed so that the right-eye pixel R in the liquid crystal display panel 2 is visually recognized by the right eye and the left-eye pixel L is visually recognized by the left eye.
  • the positional relationship between the area, the blocking area, and each pixel is adjusted.
  • 2D display is a normal image display state, the spatial light modulator 1 is OFF, and no parallax barrier is formed. Therefore, the same pixel can be visually recognized with both eyes.
  • 2D display a single image for 2D display is displayed on the liquid crystal display panel 2.
  • FIG. 7A to 7D are diagrams showing the difference between the directivity of backlight light in 2D display and the directivity of backlight light in 3D display. More specifically, FIG. 7A is a diagram illustrating a state in which the spatial light modulator 1 is turned on in 3D display. FIG. 7B is a graph showing the directivity of backlight light in 3D display. FIG. 7C is a diagram illustrating a state in which the spatial light modulator 1 is turned off in 2D display. FIG. 7D is a graph showing the directivity of the backlight in 2D display.
  • the backlight is directional in two different directions (right and left with respect to the screen). It is preferable to have.
  • the angle at which light in two directions forming a luminance peak is emitted is narrower than in the dual view mode (see FIG. 4B).
  • the lighting mode of the backlight unit suitable for 2D display may be switched as in the case of switching between the mono view mode and the dual view mode.
  • the first light source 41 and the second light source 51 may be turned on in 2D display, and only the first light source 41 may be turned on in 3D display.
  • the first light source 41 on the right side of the light guide plate 42 and the first light source 41 on the left side may be alternately turned on at predetermined time intervals.
  • the spatial light modulator 1 may be realized by switching a plurality of viewing angles.
  • the spatial light modulator 1 may perform two-stage switching between a wide viewing angle state with a wide viewing angle and a narrow viewing state with a narrow viewing angle.
  • FIG. 8A is a diagram illustrating a state in which the spatial light modulator 1 is ON in a narrow viewing angle state
  • FIG. 8B is a diagram illustrating the directivity of backlight light in the narrow viewing angle state
  • FIG. 8C is a diagram showing a state in which the spatial light modulator 1 is OFF in a wide viewing angle state
  • FIG. 8D is a diagram showing a wide viewing angle. It is a graph which shows the directivity of the backlight light in a state.
  • the viewing angle in the narrow viewing angle state, the viewing angle can be narrowed by turning on the spatial light modulator 1.
  • a mechanically operated shutter is used as the spatial light modulator 1, and backlight light emitted in an oblique direction with respect to the screen is formed by forming a blocking region. Blocked. Therefore, it becomes difficult to visually recognize the screen from the left side and the right side, and the viewing angle is narrowed.
  • the angle range in which the backlight is emitted can be narrowed as shown in FIG. 8B, and a lighting mode suitable for a narrow viewing angle state is realized. it can.
  • the pixel of the liquid crystal display panel 2 can be viewed from any direction by turning off the spatial light modulator 1 (not forming a blocking region) as shown in FIG. can do.
  • the angle range in which the backlight light is emitted can be expanded as shown in FIG. A suitable lighting style can be realized.
  • FIGS. 9A to 9D are diagrams showing a method of switching between the wide viewing angle state and the narrow viewing angle state, which is different from the example shown in FIG.
  • a liquid crystal layer capable of controlling the alignment direction of liquid crystal molecules is used as the spatial light modulator 1.
  • the liquid crystal molecules stand up with respect to the screen, so that the backlight light emitted obliquely with respect to the screen is blocked. Therefore, it becomes difficult to visually recognize the screen from the left side and the right side, and the viewing angle is narrowed.
  • the liquid crystal molecules standing up with respect to the screen is not limited to the state in which the major axis of the liquid crystal molecules is perpendicular to the screen, but the state in which the major axis has an angle greater than 0 degrees with respect to the screen. Therefore, it is sufficient that the backlight light emitted in an oblique direction can be blocked. That is, in the example shown in FIG. 9A, when the spatial light modulator 1 is turned on, the liquid crystal molecules are raised even a little with respect to the screen, and the backlight light emitted in an oblique direction can be blocked. Means that.
  • the liquid crystal molecules are not raised, so that the backlight is not blocked, and the pixels of the liquid crystal display panel 2 can be viewed from any direction. Can be visually recognized.
  • the lighting mode of the backlight unit in the example shown in (a) and (c) of FIG. 9 is the same as the lighting mode in the example shown in (a) and (c) of FIG.
  • the viewing angle may be switched in three or more stages, and the backlight unit may be turned on in three or more modes according to the switching of the viewing angle.
  • the light source switching drive circuit 8 may adjust the light amounts of the first light source 41 and / or the second light source 51 stepwise or steplessly, or may adjust the balance of the light amounts of both.
  • the first light source 41 may be turned on at 80% of the maximum output
  • the second light source 51 may be turned on at 20% of the maximum output, and these may be combined.
  • a third backlight unit is provided, and by adjusting the light quantity of these three backlights, a lighting mode suitable for the viewing angle characteristics in each mode can be realized. Good.
  • the liquid crystal layer is used as the viewing angle characteristic changing member that switches the viewing angle characteristic of the liquid crystal display panel 2, but the viewing angle characteristic changing member is not limited to the liquid crystal layer.
  • a of FIG. 10 is a figure which shows the method of forming a parallax barrier with a slide shutter.
  • FIG. 10B is a diagram illustrating a method of forming a parallax barrier using a rotary shutter.
  • the viewing angle characteristic changing member may be a slide shutter.
  • the relative position of the pair of shutters is changed by sliding one of the shutters, and the relative positions of the light transmission region and the light blocking region formed in each of the pair of shutters are shifted, so that the parallax is obtained.
  • a barrier can be formed and eliminated.
  • the viewing angle characteristic changing member has a light shielding portion and a light transmitting portion, and electrically slides a pair of light shielding members provided to overlap each other and at least one light shielding member of the pair of light shielding members.
  • It may be a slide shutter provided with a slide mechanism to be moved.
  • This slide shutter is a plan view in which at least one light shielding member of the pair of light shielding members is slid so that the light shielding portion of one light shielding member of the pair of light shielding members covers the light transmitting portion of the other light shielding member.
  • the viewing angle characteristic changing member may be a rotary shutter.
  • the parallax barrier can be formed and eliminated by rotating each rotary shutter and changing the width of the light transmitting region.
  • the viewing angle characteristic changing member may be a rotary shutter including a plurality of blades provided in parallel to each other and a rotation mechanism that rotates the blades.
  • This rotary shutter rotates the blade plate to change the angle of the blade plate with respect to the lens surface to form a continuous light-shielding portion in plan view, thereby dividing the light-transmitting region (part of the light-transmitting region).
  • the light shielding region is formed.
  • an optical element in which the refractive index of the lens is changed by applying a voltage and the direction of the optical axis is changed as a result may be used as the viewing angle characteristic changing member.
  • the viewing angle characteristic changing member is not particularly limited as long as it can form and eliminate the parallax barrier.
  • the light source switching drive circuit 8 switches the lighting style of the first backlight unit 4 and / or the second backlight unit 5 to a lighting style suitable for the switched viewing angle characteristics in accordance with the switching of the viewing angle characteristics.
  • backlight light having directivity suitable for the switched viewing angle characteristic can be emitted according to the switching of the viewing angle characteristic of the display unit 20, and the visibility of the display unit 20 can be changed even after the viewing angle characteristic is changed. Can be maintained in a preferable state.
  • Embodiment 2 The following will describe another embodiment of the present invention with reference to FIGS.
  • symbol is attached
  • the switching of the viewing angle characteristics of the spatial light modulator 1 is performed based on the result of analyzing the video signal input from the outside.
  • FIG. 11 is a diagram illustrating a configuration of the display device 200. As shown in FIG. 11, the display device 200 includes a video circuit 10 and a video signal input unit 12 in addition to the configuration of the display device 100. However, the display device 200 does not include the first backlight unit 4.
  • the video signal input unit 12 is a receiving unit (input connector) that receives a video signal output from an external device (for example, a DVD player, a broadcast receiving device, etc.).
  • an external device for example, a DVD player, a broadcast receiving device, etc.
  • the video circuit 10 generates an image to be displayed on the liquid crystal display panel 2 from the video signal (referred to as an input video signal) input from the video signal input unit 12 and outputs the image to the liquid crystal display panel 2.
  • video signal referred to as an input video signal
  • the video circuit 10 when the display device 200 is in the dual view mode, the video circuit 10 generates a right image and a left image and outputs them to the liquid crystal display panel 2.
  • the video circuit 10 When the display device 200 is in the mono view mode, the video circuit 10 generates a mono view image and outputs it to the liquid crystal display panel 2.
  • the display device 200 is a device that switches between 2D display and 3D display, the video circuit 10 generates an image corresponding to 2D display or 3D display according to the display mode, and outputs the image to the liquid crystal display panel 2.
  • the video circuit 10 includes a video analysis unit (viewing angle characteristic determination unit) 11.
  • the video analysis unit 11 analyzes the video signal (image data) indicating the video (image) displayed on the liquid crystal display panel 2 or the information added to the video signal (image data) based on the result of analysis. 2 viewing angle characteristics are determined.
  • the video analysis unit 11 when the video analysis unit 11 detects that the input video signal includes information indicating that the input video signal is a video signal for 3D display, the video analysis unit 11 displays a state corresponding to 3D display.
  • a 3D display control signal for commanding to be realized is output to the spatial light modulator control unit 7 and the light source switching drive circuit 8.
  • the video analysis unit 11 includes information indicating that the input video signal is a video signal for 2D display (or information indicating that it is a video signal for 3D display).
  • 2D display control signal for commanding to realize a state corresponding to 2D display is output to the spatial light modulator controller 7 and the light source switching drive circuit 8.
  • the video analysis unit 11 outputs a control signal for realizing a viewing angle characteristic suitable for the display style indicated by the display style information specifying the display style of the video (image) included in the input video signal. While transmitting to the control part 7, the control signal for implement
  • the display format information may specify dual view display, mono view display, or triple view display.
  • the video analysis unit 11 may determine the viewing angle characteristic of the liquid crystal display panel 2 based on the result of analyzing the content of the video indicated by the input video signal. For example, if the video analysis unit 11 determines that the input video signal includes a right-side display video and a left-side display video, the video analysis unit 11 uses the spatial light as a control signal for realizing the dual view mode. Output to the modulator controller 7 and the light source switching drive circuit 8. In addition, when the video analysis unit 11 determines that the input video signal includes a single video (monoview mode video), the video analysis unit 11 outputs a control signal for realizing the monoview mode as spatial light. Output to the modulator controller 7 and the light source switching drive circuit 8.
  • FIG. 12 is a diagram showing a lighting mode and directivity of the backlight in the display device 200.
  • FIG. More specifically, (a) of FIG. 12 is a figure which shows the lighting mode of the backlight unit in mono view mode.
  • (B) of FIG. 12 is a figure which shows the lighting mode of the backlight unit in dual view mode.
  • (C) of FIG. 12 is a figure which shows the directivity of the backlight light in mono view mode.
  • D) of FIG. 12 is a figure which shows the directivity of the backlight light in dual view mode.
  • the second backlight unit 5 includes a second light source 51 a and a second light source 51 b as the second light source 51.
  • the second light source 51a and the second light source 51b may be the same type of light source only in the arrangement, or may be different types of light sources.
  • the directivity of light transmitted through the transmission region of the spatial light modulator 1 is different between the mono view mode and the dual view mode. As described above, the positional relationship between the transmission region of the spatial light modulator 1 and the second light source 51 to be lit is adjusted. In addition to the position of the second light source 51 to be lit, the directivity of the backlight may be adjusted including the structure of the diffusion plate 52 or the light guide plate 42 (see FIG. 1).
  • the directivity of the second light source 51a and the directivity of the second light source 51b may be different.
  • the second light source 51a has directivity with respect to the front of the screen
  • the second light source 51b has directivity with respect to the left direction of the screen and the right direction of the screen.
  • a combination with a light source may be used.
  • the lighting mode of the backlight suitable for each mode is realized by switching the lighting of the second light source 51a and the second light source 51b.
  • the spatial light modulator 1 is turned off and only the second light source 51a is turned on, for example, so that the back in front of the screen is displayed. Increase the brightness of the light.
  • the spatial light modulator 1 is turned on, and only the second light source 51b is turned on, for example, to the right and Increase the brightness of the backlight light in the left direction.
  • FIG. 13 is a flowchart illustrating an example of a processing flow in the display device 200.
  • a configuration for switching between 2D display and 3D display will be described.
  • the video signal input unit 12 receives an input video signal
  • the input video signal is sent to the video circuit 10 (S1).
  • the video analysis unit 11 of the video circuit 10 determines whether or not the received input video signal includes 3D display information indicating that the input video signal is a video signal for 3D display. When it is determined that the 3D display information is included, the video analysis unit 11 determines to realize a viewing angle characteristic suitable for 3D display (viewing angle characteristic determining step) (S2). The video analysis unit 11 then outputs a 3D display control signal to the spatial light modulator control unit 7 and the light source switching drive circuit 8.
  • the video analysis unit 11 When it is determined that 3D display information is not included, the video analysis unit 11 outputs a 2D display control signal to the spatial light modulator control unit 7 and the light source switching drive circuit 8.
  • the spatial light modulator control unit 7 turns on the spatial light modulator 1 to form a parallax barrier for 3D display (viewing angle characteristic switching step) (S3).
  • the light source switching drive circuit 8 When receiving the 3D display control signal, the light source switching drive circuit 8 switches the lighting mode of the second backlight unit 5 to a lighting mode suitable for 3D display. That is, the light source switching drive circuit 8 switches the lighting mode of the second backlight unit 5 to a lighting mode suitable for the viewing angle characteristic determined by the video analysis unit 11 (lighting control step) (S4).
  • the viewing angle characteristic of the liquid crystal display panel 2 can be smoothly switched according to the image displayed on the liquid crystal display panel 2, and the backlight having directivity suitable for the switched viewing angle characteristic is emitted. Can do.
  • the display device further includes a viewing angle characteristic determination unit that determines a viewing angle characteristic of the display unit based on a result of analyzing image data indicating an image displayed on the display unit,
  • the lighting control unit may switch the lighting mode of the backlight unit to a lighting mode suitable for the viewing angle characteristic determined by the viewing angle characteristic determining unit.
  • the viewing angle characteristic determining unit determines the viewing angle characteristic of the display unit based on the result of analyzing the image data indicating the image displayed on the display unit.
  • a lighting control part controls a backlight unit so that it may light with the lighting style suitable for the viewing angle characteristic which the viewing angle characteristic determination part determined.
  • the viewing angle characteristic of the display unit can be switched according to the image displayed on the display unit, and backlight light having directivity suitable for the switched viewing angle characteristic can be emitted.
  • the display device further includes an instruction receiving unit that receives a user instruction specifying the viewing angle characteristic,
  • the lighting control unit may switch the lighting mode of the backlight unit to a lighting mode suitable for the viewing angle characteristic indicated by the instruction received by the instruction receiving unit.
  • the viewing angle characteristic is switched according to the user instruction received through the instruction receiving unit, and the backlight unit suitable for the viewing angle characteristic instructed by the user is turned on.
  • the viewing angle characteristic changing member also provides a viewing angle characteristic for realizing a first display mode for displaying a single image and a viewing angle characteristic for realizing a second display mode for simultaneously displaying a plurality of images that can be viewed from a plurality of directions. And may be switched.
  • the second display mode is, for example, a dual view mode in which two images that can be viewed from two directions are displayed simultaneously.
  • the second display mode may be a triple view (multi-view) mode in which three images that can be visually recognized from three directions are displayed simultaneously.
  • backlight light The preferred directivity of light emitted from the backlight unit (referred to as backlight light) is different between the dual view mode and the mono view mode.
  • backlight light since the screen is viewed from the left side and the right side of the screen of the display unit, it is preferable that the luminance of the backlight light increases in these directions.
  • the screen is basically viewed from the front of the screen, it is preferable that the luminance of the backlight light increases in the front direction.
  • the lighting control unit switches the lighting mode of the backlight unit to a lighting mode suitable for the switched display mode in accordance with, for example, switching between the dual view mode and the mono view mode.
  • the visibility of the display unit can be enhanced even after the first display mode and the second display mode are switched.
  • the viewing angle characteristic changing member may switch between a viewing angle characteristic that realizes two-dimensional image display and a viewing angle characteristic that realizes three-dimensional image display.
  • the above configuration makes it possible to switch between 2D image display (normal image display) and 3D image display on the display unit.
  • the two-dimensional image display and the three-dimensional image display have different preferred directivities of backlight light.
  • the preferable directivity of the backlight light in the three-dimensional image display is substantially the same as the preferable directivity of the backlight light in the above-described dual view mode.
  • the lighting control unit switches the lighting mode of the backlight unit to a lighting mode suitable for the switched display mode in accordance with the switching between the two-dimensional image display and the three-dimensional image display.
  • the visibility of the display unit can be improved even after the two-dimensional image display and the three-dimensional image display are switched.
  • the viewing angle characteristic changing member may be realized by switching a plurality of viewing angles.
  • the lighting control unit switches the lighting mode of the backlight unit to a lighting mode suitable for the switched viewing angle as the viewing angle is switched.
  • the visibility of the display unit can be improved even after the viewing angle is switched in stages.
  • the backlight unit may include a plurality of light sources, and among the plurality of light sources, a plurality of types of lighting modes in which positions of light sources to be turned on are different from each other may be realized.
  • the backlight realizes a plurality of types of lighting modes by changing which of a plurality of light sources arranged at different positions is turned on.
  • the backlight unit includes a plurality of types of light sources,
  • the lighting control unit may switch the type of the light source to be turned on with the switching of the viewing angle characteristic.
  • the backlight realizes a plurality of types of lighting by changing which of the plurality of types of light sources is turned on.
  • the plurality of types of light sources have different directivities of emitted light.
  • the backlight unit includes a light guide unit having an emission surface that emits light to the back surface of the display unit,
  • the above-mentioned multiple types of light sources A first light source disposed on a side surface when the emission surface is an upper surface and emitting light to the inside of the light guide;
  • a second light source may be included that is disposed on the back side when the emission surface is an upper surface and emits light to the back surface of the display unit via the light guide unit.
  • the first light source is disposed on the side surface side of the light guide unit, and emits light from the side surface of the light guide unit into the light guide unit.
  • a 2nd light source is arrange
  • the traveling direction of the light emitted from the first light source is different from the traveling direction of the light emitted from the second light source, and the viewing angle characteristics switched by combining or selecting these lights.
  • Backlight having directivity suitable for the above can be realized.
  • the display device may be a liquid crystal display device.
  • the display device according to the present invention can be widely used as various display devices such as liquid crystal display devices, organic EL display devices, and electronic paper.

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Abstract

L'invention concerne un dispositif d'affichage (100) comprenant : une unité d'affichage (20) comprenant en outre un élément modulateur optique spatial (1) qui commute plusieurs types de caractéristiques d'angle de visualisation ; une première unité de rétro-éclairage (4) et une seconde unité de rétro-éclairage (5) permettant d'éclairer selon plusieurs types de modes de lumière et d'illuminer l'unité d'affichage (20) depuis sa surface arrière ; et un circuit d'actionnement (8) de commutateur de source de lumière qui, lorsque les caractéristiques d'angle de visualisation sont commutées par l'élément modulateur optique spatial (1), commute les modes de lumière de la première unité de rétro-éclairage (4) et de la seconde unité de rétro-éclairage (5) vers des modes de lumière qui conviennent aux caractéristiques d'angle de visualisation commutées.
PCT/JP2012/060291 2011-04-22 2012-04-16 Dispositif d'affichage et procédé de commande WO2012144471A1 (fr)

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WO2017118234A1 (fr) * 2016-01-08 2017-07-13 京东方科技集团股份有限公司 Dispositif d'affichage et procédé de commande
JP2018503549A (ja) * 2014-11-13 2018-02-08 ジェンテックス コーポレイション 表示装置付きバックミラーシステム
JP2018522263A (ja) * 2015-05-11 2018-08-09 コーニング インコーポレイテッド 不透明スクリーンを有する表面ディスプレイユニット
CN110678692A (zh) * 2017-05-14 2020-01-10 镭亚股份有限公司 采用有源发射器的多视图背光体、显示器和方法
JP2020536472A (ja) * 2017-10-02 2020-12-10 レイア、インコーポレイテッドＬｅｉａ Ｉｎｃ． マルチビューカメラアレイ、マルチビューシステム、およびカメラサブアレイに共有カメラを備えさせる方法
TWI731657B (zh) * 2019-04-22 2021-06-21 美商雷亞有限公司 多區域背光件、多視像顯示器和方法
EP3814834A4 (fr) * 2018-06-29 2022-08-10 LEIA Inc. Rétroéclairage à format mixte, dispositif d'affichage, et procédé
CN115047672A (zh) * 2021-03-09 2022-09-13 矽光学有限公司 用于具有至少两种运行模式的显示屏的点亮装置
WO2023060381A1 (fr) * 2021-10-11 2023-04-20 镭亚股份有限公司 Rétroéclairage hybride, affichage hybride et procédé de fonctionnement de rétroéclairage hybride

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JP2022138154A (ja) * 2021-03-09 2022-09-22 ジオプティカ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 少なくとも２つの動作モードを有するディスプレイ用の照明装置
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JP7242104B2 (ja) 2021-03-09 2023-03-20 ジオプティカ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 少なくとも２つの動作モードを有するディスプレイ用の照明装置
WO2023060381A1 (fr) * 2021-10-11 2023-04-20 镭亚股份有限公司 Rétroéclairage hybride, affichage hybride et procédé de fonctionnement de rétroéclairage hybride
TWI839870B (zh) * 2021-10-11 2024-04-21 美商雷亞有限公司 混合背光件、混合顯示器和混合背光件的操作方法

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