[go: up one dir, main page]

WO2012153689A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

Info

Publication number
WO2012153689A1
WO2012153689A1 PCT/JP2012/061590 JP2012061590W WO2012153689A1 WO 2012153689 A1 WO2012153689 A1 WO 2012153689A1 JP 2012061590 W JP2012061590 W JP 2012061590W WO 2012153689 A1 WO2012153689 A1 WO 2012153689A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
light
substrates
crystal layer
transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/061590
Other languages
English (en)
Japanese (ja)
Inventor
亮 菊地
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2012153689A1 publication Critical patent/WO2012153689A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • G02B30/30—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 parallax barriers
    • G02B30/31—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 parallax barriers involving active parallax barriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • 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
    • G02F1/133553—Reflecting elements
    • G02F1/133555—Transflectors
    • 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

Definitions

  • the present invention relates to a display device that includes a switch liquid crystal panel that realizes a parallax barrier and can display different images to the right and left eyes of an observer.
  • a parallax barrier method is known as a method of showing a stereoscopic image to an observer without using special glasses.
  • Japanese Patent Application Laid-Open No. 7-261119 discloses a stereoscopic video display device including a parallax barrier unit.
  • the light from the right eye pixel and the light from the left eye pixel are separated by blocking light from a specific direction at the barrier unit. As a result, there is a problem that the transmittance of light from the backlight is greatly reduced.
  • An object of the present invention is to provide a display device capable of suppressing a significant decrease in light transmittance from a backlight.
  • the display device of the present invention includes a liquid crystal display panel having a liquid crystal layer between a pair of substrates, a backlight disposed to face the liquid crystal display panel, and disposed between the liquid crystal display panel and the backlight.
  • a switch liquid crystal panel having a liquid crystal layer between a pair of substrates, and capable of realizing a parallax barrier in which a transmissive portion that transmits light from the backlight and a light shielding portion that blocks the light are alternately arranged; and the liquid crystal It is arranged between the liquid crystal layer of the display panel and the liquid crystal layer of the switch liquid crystal panel, has a predetermined transmission axis, transmits light that vibrates in the direction of the transmission axis, and vibrates in directions other than the transmission axis.
  • the display device of the present invention it is possible to suppress the light transmittance from the backlight from greatly decreasing.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a display device as a first embodiment of the present invention.
  • FIG. 2 is an explanatory diagram showing optical axes of various optical films included in the display device shown in FIG.
  • FIG. 3 is a plan view showing a plurality of drive electrodes formed on one substrate included in the switch liquid crystal panel.
  • FIG. 4 is a plan view showing the counter electrode formed on the other substrate included in the switch liquid crystal panel.
  • FIG. 5 is a cross-sectional view showing a state in which a parallax barrier is realized in the switch liquid crystal panel.
  • FIG. 6 is an exploded perspective view showing each member constituting the backlight.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a display device as a first embodiment of the present invention.
  • FIG. 2 is an explanatory diagram showing optical axes of various optical films included in the display device shown in FIG.
  • FIG. 3 is a plan view showing a plurality of drive electrodes formed on one substrate included in
  • FIG. 7 is a cross-sectional view illustrating a phenomenon in which light from the backlight is reflected by the reflective / transmissive film.
  • FIG. 8 shows experimental data of the transmittance of the liquid crystal display panel.
  • FIG. 9 is an explanatory diagram showing optical axes of various optical films included in the display device as the second embodiment of the present invention.
  • a display device includes a liquid crystal display panel including a liquid crystal layer between a pair of substrates, a backlight disposed to face the liquid crystal display panel, the liquid crystal display panel, and the backlight.
  • the transmission liquid crystal layer disposed between the panel, the liquid crystal layer of the liquid crystal display panel and the liquid crystal layer of the switch liquid crystal panel, and having a predetermined transmission axis and transmitting light oscillating in the direction of the transmission axis,
  • a reflection / transmission film that reflects light oscillating in a direction other than a polarizing plate disposed between the liquid crystal layer of the liquid crystal display panel and the liquid crystal layer of the switch liquid crystal panel, and the transmission axis is the polarization Plank It is parallel to the optical axis
  • the light that passes through the transmission part vibrates in the direction of the polarization axis of the polarizing plate. Thereby, the light passing through the transmission part passes through the reflection / transmission film and enters the liquid crystal display panel.
  • the light that passes through the light shielding portion vibrates in a direction different from the direction of the polarization axis of the polarizing plate.
  • the light which passes a light shielding part is reflected by the reflective transmission film.
  • the light reflected by the reflective / transmissive film passes through the switch liquid crystal panel and then is reflected by the backlight.
  • the light reflected by the backlight is reflected again by the reflection / transmission film when passing through the light shielding part, and is transmitted through the reflection / transmission film when passing through the transmission part and then enters the liquid crystal display panel.
  • the switch liquid crystal panel includes a pair of substrates, a liquid crystal layer sealed between the pair of substrates, and the liquid crystal layer side of each of the pair of substrates.
  • the alignment film is provided, and the alignment axis of the alignment film provided on the side of the pair of substrates located on the reflective / transmissive film side is parallel to the transmission axis.
  • the switch liquid crystal panel has a pair of substrates, a liquid crystal layer sealed between the pair of substrates, and a liquid crystal layer side of each of the pair of substrates. And an alignment axis of the alignment film provided on the side of the pair of substrates located on the reflective / transmissive film side intersects the transmission axis. Even with such a configuration, the transmittance of the liquid crystal display panel can be improved in a state in which the parallax barrier is realized in the switch liquid crystal panel.
  • the fourth configuration is a configuration in which the orientation axis is orthogonal to the transmission axis in the third configuration.
  • the fifth configuration is a configuration in which the reflection / transmission film is disposed between the polarizing plate and the switch liquid crystal panel in any one of the first to fourth configurations.
  • the reflection / transmission film is disposed between the polarizing plate and the switch liquid crystal panel in any one of the first to fourth configurations.
  • the sixth configuration is a configuration in which the polarizing plate and the reflective / transmissive film are integrally formed in any one of the first to fifth configurations. In such a configuration, the polarizing plate and the reflection / transmission film can be handled together.
  • the switch liquid crystal panel includes the polarizing plate and the reflective / transmissive film
  • the switch liquid crystal panel is a common electrode formed on one of the pair of substrates.
  • a plurality of driving electrodes that are formed on the other of the pair of substrates and that realize the light shielding portion together with the common electrode when a voltage is applied
  • the reflective / transmissive film includes the pair of substrates, It is the structure arrange
  • a light shielding portion is formed at a position corresponding to the drive electrode.
  • a transmission part is formed between two adjacent light shielding parts.
  • the light incident between two adjacent drive electrodes changes its polarization direction when passing through the liquid crystal layer.
  • the polarization direction of the light that has passed through the liquid crystal layer coincides with the transmission axis of the reflection / transmission film and the polarization axis of the polarizing plate. Therefore, light incident between two adjacent drive electrodes passes through the reflection / transmission film and the polarizing plate. That is, the transmissive part transmits light from the backlight.
  • the light incident on the drive electrode does not change its polarization direction when passing through the liquid crystal layer.
  • the polarization direction of the light that has passed through the liquid crystal layer is orthogonal to the transmission axis of the reflective / transmissive film. Therefore, the light incident on the drive electrode is reflected by the reflective / transmissive film. That is, the light shielding unit shields light from the backlight.
  • the light reflected by the reflective / transmissive film is reflected by the backlight after passing through the pair of substrates and the liquid crystal layer.
  • the light reflected by the backlight is incident on the drive electrode, it is reflected again by the reflective / transmissive film, and when it is incident between two adjacent drive electrodes, it passes through the reflective / transmissive film and the polarizing plate. Incident on the liquid crystal display panel.
  • each figure referred below demonstrates the simplified main component required in order to demonstrate this invention among the structural members of embodiment of this invention for convenience of explanation. Therefore, the display device according to the present invention can include arbitrary constituent members that are not shown in the drawings referred to in this specification. Moreover, the dimension of the member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each member, etc. faithfully.
  • FIG. 1 shows a display device 10 as a first embodiment of the present invention.
  • the display device 10 includes a liquid crystal display panel 12, a switch liquid crystal panel 16, and a backlight 18.
  • the liquid crystal display panel 12 includes an active matrix substrate 20, a counter substrate 22 disposed to face the active matrix substrate 20, and a liquid crystal layer 24 sealed between the active matrix substrate 20 and the counter substrate 22.
  • Each of the active matrix substrate 20 and the counter substrate 22 includes polarizing plates 26a and 26b bonded to the surface opposite to the liquid crystal layer 24 side.
  • the polarization axes X1 and X2 of these polarizing plates 26a and 26b are orthogonal to each other as shown in FIG.
  • liquid crystal display panel 12 a plurality of pixels are formed in a matrix.
  • a region where a plurality of pixels are formed in a matrix is a display region of the liquid crystal display panel 12.
  • a column of pixels that displays an image (right-eye image) reflected in the right eye of the observer, and a column of pixels that displays an image (left-eye image) reflected in the left eye of the viewer. are alternately arranged in the horizontal direction of the liquid crystal display panel 12.
  • the image for the right eye and the image for the left eye are each divided for each pixel column (in a stripe shape). Then, a composite image obtained by alternately arranging the right eye image and the left eye image divided in the stripe shape is displayed in the display area of the liquid crystal display panel 12.
  • a switch liquid crystal panel 16 is disposed below the liquid crystal display panel 12.
  • the switch liquid crystal panel 16 includes a pair of substrates 28 and 30, a liquid crystal layer 32 sealed between the pair of substrates 28 and 30, a polarizing plate 42, a polarizing plate 26 a, and the reflective / transmissive film 14. That is, in the example shown in FIG. 1, the polarizing plate on the viewer side of the switch liquid crystal panel 16 and the polarizing plate on the backlight 18 side of the liquid crystal display panel 12 are realized by the same polarizing plate 26a.
  • the substrates 28 and 30 are, for example, low alkali glass substrates.
  • the liquid crystal layer 32 is made of, for example, TN (Twisted Nematic) mode liquid crystal.
  • the liquid crystal layer 32 is made of a TN mode liquid crystal having a positive dielectric constant.
  • the substrate 28 has a plurality of drive electrodes 34 formed thereon.
  • the drive electrodes 34 are shown, but the number of drive electrodes 34 is arbitrary.
  • Each of the plurality of drive electrodes 34 extends with a substantially constant width dimension in the vertical direction of the substrate 28 (the vertical direction of the liquid crystal display panel 12). In other words, the plurality of drive electrodes 34 are arranged in the lateral direction of the substrate 28 (lateral direction of the liquid crystal display panel 12).
  • One end of the drive electrode 34 in the length direction (upper end in FIG. 3) is connected by a connecting electrode 36.
  • the connecting electrode 36 extends with a substantially constant width dimension in the lateral direction of the substrate 28.
  • the counter electrode 38 is formed on the substrate 30 as shown in FIG.
  • the counter electrode 38 overlaps all of the plurality of drive electrodes 34 in the direction in which the pair of substrates 28 and 30 face each other.
  • the counter electrode 38 is formed over the entire region in the switch liquid crystal panel 16 where a parallax barrier 48 described later is realized.
  • the driving electrode 34, the connecting electrode 36, and the counter electrode 38 are transparent conductive films such as an indium tin oxide film (ITO film), for example.
  • the connection electrode 36 may be a metal film such as titanium or molybdenum.
  • Alignment films 40a and 40b are formed on the substrates 28 and 30 as shown in FIG.
  • the alignment films 40a and 40b are, for example, polyimide resin films.
  • the alignment film 40 a covers the drive electrode 34 and the connection electrode 36.
  • the alignment axis X4 of the alignment film 40a is orthogonal to the transmission axis X3 of the reflective / transmissive film 14, as shown in FIG. Note that the alignment axis X4 of the alignment film 40a does not need to be strictly orthogonal to the transmission axis X3 of the reflective / transmissive film 14, and may be substantially orthogonal.
  • the alignment film 40 b covers the counter electrode 38.
  • the alignment axis X5 of the alignment film 40b is parallel to the transmission axis X3 of the reflective / transmissive film 14, as shown in FIG.
  • the polarizing plate 42 is bonded to the surface of the substrate 28 opposite to the liquid crystal layer 32 side. That is, the polarizing plate 42 is disposed between the substrate 28 and the backlight 18. As shown in FIG. 2, the polarization axis X6 of the polarizing plate 42 is orthogonal to the transmission axis X3 of the reflection / transmission film 14 and the polarization axis X1 of the polarizing plate 26a.
  • the reflection / transmission film 14 is a brightness enhancement film.
  • the reflective / transmissive film 14 has a transmission axis X3 (see FIG. 2).
  • the reflective / transmissive film 14 transmits light that vibrates in the same direction as the transmission axis X3, and reflects light that vibrates in a direction different from the transmission axis X3.
  • the transmission axis X3 of the reflection / transmission film 14 is parallel to the polarization axis X1 of the polarizing plate 26a as shown in FIG.
  • the transmission axis X3 of the reflection / transmission film 14 does not need to be strictly parallel to the polarization axis X1 of the polarizing plate 26a, and may be substantially parallel.
  • the reflection / transmission film 14 is, for example, a film in which a plurality of dielectric thin films are laminated, a film in which a plurality of thin films having different refractive index anisotropies are laminated, a film in which a cholesteric liquid crystal layer and a retardation plate are laminated, or the like.
  • DBEF series manufactured by 3M Company can be adopted.
  • the reflective / transmissive film 14 may include a polarizing plate 26a.
  • the reflective / transmissive film 14 and the polarizing plate 26a can be handled integrally.
  • a polarizing plate with a brightness enhancement film (NIPOCS) manufactured by Nitto Denko Corporation can be used as the reflection / transmission film 14 including the polarizing plate 26a.
  • the switch liquid crystal panel 16 when a voltage is applied between the plurality of drive electrodes 34 and the counter electrode 38, the orientation of the liquid crystal molecules located between the drive electrodes 34 and the counter electrode 38 changes. As a result, as shown in FIG. 5, in the liquid crystal layer 32, a portion located between each drive electrode 34 and the counter electrode 38 functions as a light shielding portion 44, and between two adjacent light shielding portions 44, 44. It functions as the transmission part 46. As a result, in the switch liquid crystal panel 16, a parallax barrier 48 in which the light shielding portions 44 and the transmission portions 46 are alternately arranged is realized.
  • the portion of the liquid crystal layer 32 that functions as the light blocking portion 44 cannot block the light from the backlight 18 by itself.
  • the optical member for example, the polarizing plates 26a and 42
  • a backlight 18 is disposed below the switch liquid crystal panel 16. As shown in FIG. 6, the backlight 18 includes a plurality of light emitting diodes 50, a light guide plate 52, a reflection sheet 54, a diffusion sheet 56, and two refractive prism sheets 58 a and 58 b.
  • the plurality of light emitting diodes 50 are arranged on one side.
  • a dot pattern that scatters light is formed on the bottom of the light guide plate 52.
  • the reflection sheet 54 is disposed below the light guide plate 52 and contributes to the reuse of light.
  • the diffusion sheet 56 is disposed on the upper side of the light guide plate 52 and reduces luminance unevenness.
  • the two refractive prism sheets 58a and 58b are arranged on the upper side of the diffusion sheet 56 and improve the luminance.
  • a diffusion sheet may be further stacked on the two refractive prism sheets 58a and 58b. Thereby, it is possible to prevent interference fringes from being formed on the switch liquid crystal panel 16.
  • the backlight 18 may be, for example, a direct type other than the edge light type shown in FIG.
  • the light source of the backlight 18 is not limited to the light emitting diode 50, and may be a cold cathode tube, for example.
  • each light emitting diode 50 In the backlight 18, the light emitted from each light emitting diode 50 is incident on the light guide plate 52, scattered in the light guide plate 52, and then emitted upward from the main surface of the light guide plate 52.
  • the light emitted from the light guide plate 52 is diffused by the diffusion sheet 56 and then condensed by the two refractive prism sheets 58a and 58b. In this way, light with reduced brightness unevenness and improved brightness is irradiated onto the switch liquid crystal panel 16.
  • a composite image obtained by alternately arranging the right eye image and the left eye image divided into stripes is displayed on the liquid crystal display panel 12. Displayed in the display area. Thereby, only the right-eye image reaches the observer's right eye, and only the left-eye image reaches the observer's left eye. As a result, the observer can view a stereoscopic image without using special glasses.
  • the display device 10 when a planar image is displayed on the liquid crystal display panel 12 in a state where the parallax barrier 48 is not displayed on the switch liquid crystal panel 16, the planar image can be shown to the observer.
  • the reflective / transmissive film 14 is disposed between the substrate 30 provided in the switch liquid crystal panel 16 and the polarizing plate 26a. Thereby, the transmittance
  • the light from the backlight 18 passes through the polarizing plate 42.
  • the light that has passed through the polarizing plate 42 is light that vibrates in the direction of the polarization axis X6 of the polarizing plate 42.
  • the parallax barrier 48 When the parallax barrier 48 is realized in the switch liquid crystal panel 16, the direction of the liquid crystal molecules does not change in the portion that functions as the transmission portion 46 in the liquid crystal layer 32. As a result, when the light passing through the portion functioning as the transmission portion 46 in the liquid crystal layer 32 passes through the liquid crystal layer 32, the polarization direction is rotated by 90 degrees.
  • the polarization direction of the light that has passed through the portion functioning as the transmission portion 46 in the liquid crystal layer 32 is parallel to the transmission axis X3 of the reflective / transmissive film 14. As a result, as shown in FIG. 7, the light that has passed through the portion functioning as the transmissive portion 46 in the liquid crystal layer 32 passes through the reflective / transmissive film 14 and the polarizing plate 26 a and enters the liquid crystal display panel 12.
  • the polarization direction of the light that has passed through the portion functioning as the light shielding portion 44 in the liquid crystal layer 32 is orthogonal to the transmission axis X3 of the reflective / transmissive film 14. As a result, as shown in FIG. 7, the light that has passed through the portion that functions as the light shielding portion 44 in the liquid crystal layer 32 is reflected by the reflective / transmissive film 14.
  • the light reflected by the reflective / transmissive film 14 enters the backlight 18 after passing through the substrate 30, the liquid crystal layer 32, the substrate 28, and the polarizing plate 42.
  • the light incident on the backlight 18 is reflected in the backlight 18 and then exits from the backlight 18.
  • light is reflected between the reflection sheet 54 and various optical films 56, 58 a, 58 b included in the backlight 18.
  • the light exiting from the backlight 18 passes again through the portion functioning as the light shielding portion 44 in the liquid crystal layer 32, the light is reflected between the reflective / transmissive film 14 and the backlight 18 as described above. repeat.
  • the light exiting from the backlight 18 passes through the portion functioning as the transmission portion 46 in the liquid crystal layer 32, the light passes through the reflective / transmissive film 14 and the polarizing plate 26a as described above, and the liquid crystal Incident on the display panel 12.
  • FIG. 8 is experimental data showing how much the transmittance of the liquid crystal display panel 12 is improved.
  • an example is experimental data of the display device 10 of the present embodiment.
  • the comparative example is experimental data of a display device having a configuration that does not include the reflective / transmissive film 14 as compared with the display device 10 of the present embodiment.
  • the parallax barrier 48 is displayed on the switch liquid crystal panel 16 and the composite image is displayed on the liquid crystal display panel 12
  • the right-eye image and the left-eye image are displayed in white, and the liquid crystal display panel 12
  • the transmittance is measured by changing the angle in the surface direction of the liquid crystal display panel 12.
  • the angle is an angle tilted to the left and right with reference to the case where the liquid crystal display panel 12 is viewed from the front.
  • the transmittance of the liquid crystal display panel 12 at the optimal position for the observer to see the left-eye image with the left eye was 1.99% in the example.
  • the comparative example it was 1.85%. From these results, it was confirmed that the transmittance of the liquid crystal display panel 12 was improved by about 8%.
  • the transmittance of the liquid crystal display panel 12 at the optimum position for the observer to view the right-eye image with the right eye was 1.98%.
  • the comparative example it was 1.84%. From these results, it was confirmed that the transmittance of the liquid crystal display panel 12 was improved by about 8%.
  • the transmission axis X3 of the reflective / transmissive film 14 and the alignment axis X5 of the alignment film 40b are parallel, more light can easily pass through the switch liquid crystal panel 16. As a result, the transmittance of the liquid crystal display panel 12 is further improved.
  • connection electrode 36 Since one end in the length direction of the plurality of drive electrodes 34 is connected by the connection electrode 36, the number of wirings required when applying a voltage to the plurality of drive electrodes 34 all at once can be reduced.
  • the counter electrode 38 is formed over the entire region where the parallax barrier 48 is realized, the counter electrode 38 can be easily formed.
  • the display device of this embodiment differs from the display device 10 of the first embodiment in the alignment axes X4 and X5 of the alignment films 40a and 40b.
  • the alignment axis X4 of the alignment film 40a is parallel to the transmission axis X3 of the reflective / transmissive film 14
  • the alignment axis X5 of the alignment film 40b is parallel to the transmission axis X3 of the reflective / transmissive film 14. Orthogonal.
  • the alignment axis X4 of the alignment film 40a and the alignment axis X5 of the alignment film 40b are orthogonal to each other, when the light that has passed through the polarizing plate 42 passes through a portion that functions as the transmission part 46 in the liquid crystal layer 32, the light When the liquid crystal layer 32 passes through the portion functioning as the transmission portion 46, the polarization direction is rotated by 90 degrees. On the other hand, when the light that has passed through the polarizing plate 42 passes through a portion that functions as the light shielding portion 44 in the liquid crystal layer 32, the light passes through the portion that functions as the light shielding portion 44 in the liquid crystal layer 32 as it is. Therefore, also in the display device of the present embodiment, the same effect as that of the display device 10 of the first embodiment can be obtained.
  • the present invention is applicable to a display device in which different images are displayed when the display screen is viewed from the left oblique direction and when viewed from the right oblique direction.
  • the alignment axis X5 of the alignment film 40b and the transmission axis X3 of the reflective / transmissive film 14 are orthogonal to each other.
  • the alignment axis X5 and the transmission axis X3 are not necessarily orthogonal to each other. It may be crossed.
  • the liquid crystal layer 32 is made of, for example, a TN mode liquid crystal.

Landscapes

  • Liquid Crystal (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

La présente invention a pour objet un dispositif d'affichage qui permet d'éviter une diminution considérable de la transmission de lumière en provenance d'un rétroéclairage. Le dispositif d'affichage comprend : un panneau d'affichage à cristaux liquides (12) ; un rétroéclairage (18) qui se situe en regard du panneau d'affichage à cristaux liquides (12) ; un panneau à cristaux liquides à commutateur (16) qui se trouve entre le panneau d'affichage à cristaux liquides (12) et le rétroéclairage (18), et qui peut offrir une barrière de disparité (48) dans laquelle des parties de transmission (46) transmettant de la lumière en provenance du rétroéclairage (18) et des parties protectrices (44) protégeant de la lumière sont disposées en alternance ; un film de transmission et de réflexion (14) qui est présent entre le panneau d'affichage à cristaux liquides (12) et le panneau à cristaux liquides à commutateur (16), qui présente un axe de transmission (X3) imposé, et qui transmet de la lumière oscillant dans la direction de l'axe de transmission (X3) tout en réfléchissant de la lumière oscillant dans des directions autres que celle de l'axe de transmission (X3) ; ainsi qu'une plaque de polarisation (26a) se trouvant entre le panneau d'affichage à cristaux liquides (12) et le panneau à cristaux liquides à commutateur (16). L'axe de transmission (X3) est parallèle à un axe de polarisation (X1) de ladite plaque de polarisation (26a).
PCT/JP2012/061590 2011-05-09 2012-05-02 Dispositif d'affichage Ceased WO2012153689A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-104567 2011-05-09
JP2011104567A JP2014139593A (ja) 2011-05-09 2011-05-09 表示装置

Publications (1)

Publication Number Publication Date
WO2012153689A1 true WO2012153689A1 (fr) 2012-11-15

Family

ID=47139169

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/061590 Ceased WO2012153689A1 (fr) 2011-05-09 2012-05-02 Dispositif d'affichage

Country Status (2)

Country Link
JP (1) JP2014139593A (fr)
WO (1) WO2012153689A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10142572A (ja) * 1996-09-27 1998-05-29 Sharp Corp 空間光変調器、方向性ディスプレイ、および方向性光源
JP2002090533A (ja) * 2000-09-14 2002-03-27 Nitto Denko Corp 輝度向上フィルム及びそれを用いた偏光板と液晶表示装置
JP2004512564A (ja) * 2000-10-24 2004-04-22 ディメンション　テクノロジーズ　インコーポレイテッド 自動立体ディスプレイ
JP2009522602A (ja) * 2005-12-30 2009-06-11 スリーエム イノベイティブ プロパティズ カンパニー 強反射偏光フィルム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10142572A (ja) * 1996-09-27 1998-05-29 Sharp Corp 空間光変調器、方向性ディスプレイ、および方向性光源
JP2002090533A (ja) * 2000-09-14 2002-03-27 Nitto Denko Corp 輝度向上フィルム及びそれを用いた偏光板と液晶表示装置
JP2004512564A (ja) * 2000-10-24 2004-04-22 ディメンション　テクノロジーズ　インコーポレイテッド 自動立体ディスプレイ
JP2009522602A (ja) * 2005-12-30 2009-06-11 スリーエム イノベイティブ プロパティズ カンパニー 強反射偏光フィルム

Also Published As

Publication number Publication date
JP2014139593A (ja) 2014-07-31

Similar Documents

Publication Publication Date Title
JP5596625B2 (ja) 表示装置
KR101937865B1 (ko) 액정 렌즈 패널 및 이를 구비하는 표시 장치
TWI474080B (zh) Liquid crystal display device
WO2013099793A1 (fr) Dispositif d'affichage stéréoscopique
JP5462131B2 (ja) 液晶表示装置
US8970797B2 (en) Liquid crystal display adopting structure of liquid crystal lens
KR20160088397A (ko) 헤드업 디스플레이 장치용 액정 표시 장치 및 헤드업 디스플레이 장치
JP2012226161A (ja) 表示装置
CN102375265A (zh) 显示设备和光阻挡装置
US10481465B2 (en) Illumination device and display device
US9259906B2 (en) Optical laminated body, method of manufacturing the same, and display unit
US9459462B2 (en) Stereoscopic display device
US7471346B2 (en) Transflective liquid crystal display panel, 2D/3D switching type liquid crystal display panel, and 2D/3D switching type liquid crystal display
WO2014162798A1 (fr) Panneau et appareil d'affichage
WO2012014827A1 (fr) Panneau à cristaux liquides à commutateur et dispositif d'affichage
US20140307188A1 (en) Display device
JP5114853B2 (ja) 表示装置
KR101948827B1 (ko) 투명 액정표시장치
JP5669945B2 (ja) 立体表示装置
WO2012153689A1 (fr) Dispositif d'affichage
JP5177861B2 (ja) 液晶表示装置
KR20150072175A (ko) 영상 표시 장치
TW201339701A (zh) ３ｄ顯示裝置
JP2021173928A (ja) 表示装置
US20120212815A1 (en) Stereoscopic image display device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12782084

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12782084

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP