WO2006019174A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2006019174A1 WO2006019174A1 PCT/JP2005/015302 JP2005015302W WO2006019174A1 WO 2006019174 A1 WO2006019174 A1 WO 2006019174A1 JP 2005015302 W JP2005015302 W JP 2005015302W WO 2006019174 A1 WO2006019174 A1 WO 2006019174A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- display panel
- transparent substrate
- display device
- display
- 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
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Classifications
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- 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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width 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
- G02B6/0063—Means for improving the coupling-out of light from the light guide for extracting light out both the major surfaces 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
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
-
- 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
- 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
- G02F1/133342—Constructional arrangements; Manufacturing methods for double-sided displays
-
- 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
- G02F1/133616—Front illuminating devices
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/44—Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
-
- 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
- G02F2203/00—Function characteristic
- G02F2203/02—Function characteristic reflective
Definitions
- the present invention relates to a display device using an electro-optic conversion member, and more particularly, to a double-sided display device in which two display panels are arranged back to back and each display panel has a viewing authorization function.
- the present invention provides a display device having a display panel having a configuration in which the electro-optic conversion member is not limited to liquid crystal but may be another electro-optic conversion member, and the electro-optic conversion member is sealed between two opposing substrates.
- the substrate having the light guiding function described below is transparent at least in the substrate, and the transparency is slightly lowered or cloudy or the light diffusing function. You may have. Background art
- Liquid crystal display devices have rapidly developed in various fields as low power consumption, thin and light display devices.
- liquid crystal display devices have been adopted for all of the mobile phones that have made remarkable progress in recent years.
- Reflective liquid crystal display devices are often used for liquid crystal display devices used in mobile phones in order to emphasize low power consumption and extend battery life. Most of them are transflective liquid crystal displays equipped with a backlight. This is because the display is difficult to see in a dark environment where sufficient external light cannot be obtained because the liquid crystal display device is not a self-luminous display device. It is intended to improve sex.
- the second liquid crystal display is located at a position where it can be seen in a folded state, separately from the first liquid crystal display device used with the mobile phone open. A device has been installed and various information has been constantly displayed on the second liquid crystal display device.
- FIG. 16 is a diagram showing a structural example of a conventional mobile phone.
- a main body 1 1 0 0 and a lid 1 2 0 0 are pivotally coupled to each other by a hinge 1 3 0 0 so as to be opened and closed.
- a keyboard 1 1 0 9 is provided on the upper surface of 1 0 0, and the first liquid crystal display device 1 1 0 1 and the second liquid crystal display device 1 1 0 2 are back-to-back on the lid 1 2 0 0 Arranged to form a double-sided display device.
- the first liquid crystal display device 1 1 0 1 is composed of a first display panel 1 1 0 3 and a first backlight 1 1 0 4
- the second liquid crystal display device 1 1 0 2 is a second display It consists of a panel 1 1 0 5 and a second knock lay 1 1 0 6.
- the display panel 1 1 0 3 and 1 1 0 5 can be seen on the inside (right side in the figure) and outside (left side in the figure) side of the casing of the lid 1 2 0 0, respectively.
- a first windshield window 1 1 0 7 and a second windshield window 1 1 0 8 are provided.
- a display function in the cellular phone device 100 shown in FIG. 16 will be described.
- the lid 1 2 0 0 that is folded over the main body 1 1 0 0 0 is rotated in the direction of the arrow. open.
- the first display panel 1 1 0 3 displays and
- the second display panel 1 1 0 5 is the display power and the second backlight 1 1 0 6 is off. Therefore, the user can operate the keypad 1 1 0 9 of the main body 1 1 0 0 0 while viewing the display of the first liquid crystal display device 1 1 0 1.
- the user When the user folds and carries the cellular phone device 100 0 0, the user turns the body 1 2 0 0 in the direction opposite to the arrow and folds it so as to overlap the body 1 1 0 0.
- the display on the first display panel 1 1 0 3 is stopped and the first pack light 1 1 0 4 is also turned off.
- the second display panel 1 1 0 5 remains on display, and the second backlight 1 1 0 6 is turned on.
- the second pack light 1106 is turned on and then turned off after several tens of seconds.
- the second backlight 1 1 0 6 is also lit when a call is received or when the user presses a key or the like.
- FIG. 17 is a diagram showing an outline of another conventional liquid crystal display device (see Patent Document 1).
- a light source 5 8 that is a backlight 51 and a light guide member between a first display panel 40 and a second display panel 50
- the first display panel 40 is a transflective black-and-white liquid crystal display device.
- the liquid crystal layer 4 4 is sealed between the front transparent substrate 4 1 and the back transparent substrate 4 2 by a seal portion 4 3. Further, a transflective film 45 is provided on the liquid crystal layer 44 side of the back side transparent substrate 42, and a polarizing plate 46 is provided on the front side of the front side transparent substrate 41.
- the second display panel 50 is a transmissive color liquid crystal display device.
- Liquid crystal layer 5 5 force Sealed between the front transparent substrate 5 2 and the back transparent substrate 5 3 by a seal part 5 4.
- Back side transparent substrate 5 2 Liquid crystal layer 5 5
- a force rafil evening 56 is provided, and on the front side of the front transparent substrate 52 and on the back side of the back transparent substrate 53, polarizing plates 5 7 and 5 8 are provided, respectively.
- electrodes, alignment films, or insulating films are provided on the surface of each substrate on the liquid crystal side.
- the external light S incident on the first display panel 40 is transmitted through the polarizing plate 46, the liquid crystal layer 44, etc., and then reflected by the semi-transmissive reflective film 45, and again the liquid crystal layer 44, polarized light Visible through plate 4 6.
- the first display panel 40 functions as a reflective liquid crystal display device.
- the backlight 51 when the backlight 51 is turned on, light from the backlight passes through the light guide member 49, the transflective film 45, and the liquid crystal layer 44 when the light is directed to the second display panel.
- the second display panel 50 observed as light S ′ by the viewer is a transmissive color type liquid crystal display device.
- the backlight 51 When the backlight 51 is turned on, the light S 1 traveling in the direction of the second display panel 50 proceeds as it is and becomes the light source of the second display panel 50.
- the light directed toward the first display panel 40 is transmitted through the transparent substrate 42 of the first display panel 40 and then the transflective film of the first display panel 40.
- a part of the light is reflected at 45 and proceeds in the direction of the second display panel 50 to become a light source of the second display panel 50.
- the remaining light that passes through the transflective film is blocked by the liquid crystal layer 44 and does not reach the viewer. In this way, half the light emitted from the backlight device 51 is transmitted to the second display panel.
- FIG. 18 is a diagram showing an outline of still another conventional liquid crystal display device (see Patent Document 2).
- the outer peripheral portions of the first transparent substrate 60 and the second transparent substrate 61 are sealed by the seal portion 62, and the liquid is interposed between them.
- a display panel 6 4 having a liquid crystal layer 6 3 by enclosing a crystal substance is provided.
- An integrated circuit 65 that drives the liquid crystal device is connected to the lower surface on the right outer side of the seal portion 62 of the first transparent substrate 60 by an anisotropic conductive layer 6 7 including conductive grains 6 6. Yes.
- a light control layer 68 is formed on the viewing side (upward in the figure) of the first transparent substrate 60. The light control layer 68 is formed over the entire area except for the portion to which the integrated circuit 65 on the first transparent substrate 60 is connected.
- the first polarizing member 7 1 composed of the first polarizing plate 6 9 and the retardation plate 70 is
- the light control layer 6 8 is disposed above the light control layer 6 8.
- An internal reflection layer 72 is formed on the liquid crystal layer 63 side of the second transparent substrate 61.
- the light source 7 3 is connected to the first transparent substrate 6 via the second polarizing plate 7 4 and the second retardation plate ⁇ 5.
- the thickness of the first transparent substrate 60 is thicker than that of the second transparent substrate 61 1.
- the first transparent substrate 60 having the upper portion 6 8 is bonded to the first polarizing plate 74 and the light control layer 68 by an adhesive member 76.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-45
- Patent Document 2 Japanese Patent Laid-Open No. 2 0 0 1-7 5 0 8 7 Disclosure of Invention
- the thickness of the first display panel 1 1 0 3 is 1.5 mm, and the thickness of the first backlight 1 1 0 4 is 1 mm. Yes, the total thickness is 2.5 mm.
- the second liquid crystal display device 1 1 0 2 has the same thickness as the first liquid crystal display device 1 1 0 1, so it has almost the same thickness, so it is about 5 mm when the two liquid crystal devices are stacked back to back It becomes the thickness of.
- the thickness of the support frame, etc. adds to the thickness of the mobile phone. That is, When the two liquid crystal display devices 1 1 0 1 and 1 1 0 2 are arranged back to back, the thickness of the mobile phone increases and there is a problem of lack of portability.
- the liquid crystal display device illustrated in FIG. 17 includes a first display panel 40 and a second display panel 50, and is used to illuminate the first display panel 40 and the second display panel 50. Two backlight devices 5 1 are used. Further, in the liquid crystal display device shown in FIG. 18, the light control layer 68 is formed on the viewing side of the first transparent substrate, and the first polarizing member is disposed above the light control layer 68. there were.
- An object of the present invention is to propose a display device for improving such a conventional problem.
- Another object of the present invention is to provide a display device in which one display panel includes an illuminating unit that illuminates the other display panel, thereby eliminating the need for a backlight device and reducing the thickness.
- the display device according to the present invention includes a first display panel having a transparent substrate and a reflective layer, a second display panel, and a light source, and is incident on the transparent substrate of the first display panel from the light source. The light is reflected by the reflective layer of the first display panel and illuminates the second display panel.
- the light on the transparent substrate of the first display panel 2 further has a light control layer provided on the display panel side, It is preferable that the light incident on the transparent substrate is reflected by the reflective layer and illuminates the second display panel via the light control layer.
- the light control layer is directly bonded to the transparent substrate.
- the light control layer is preferably formed integrally with the transparent substrate.
- the size of the light control layer and the display area of the second display panel are substantially equal.
- the display device further includes a mechanism sheet disposed between the light control layer and the second display panel.
- 1 is a liquid crystal display panel having a first liquid crystal layer sandwiched between a second transparent substrate, a first transparent substrate, and a second transparent substrate, and the reflective layer includes the first liquid crystal It is preferable to dispose between the crystal layer and the transparent substrate.
- the display device preferably further includes a front light disposed outside the second transparent substrate to irradiate the first liquid crystal panel.
- the first display panel is preferably an organic EL display, a microcapsule electrophoretic display, an electropowder fluid display, or an electron emission display.
- the light source is preferably arranged on the side surface side of the transparent substrate.
- the second display panel is sandwiched between the third transparent substrate, the fourth transparent substrate, and the third and fourth transparent substrates.
- a liquid crystal display panel having a held second liquid crystal layer is preferable.
- the first display panel and the second display panel are arranged so that they can be observed from both sides.
- the display device according to the present invention includes the first transparent substrate, the second display panel, and the second display panel.
- a first liquid crystal surface having a transparent substrate, a first liquid crystal layer sandwiched between the first and second transparent substrates, and a reflective layer disposed between the first liquid crystal layer and the second transparent substrate. Display panel;
- a second transparent substrate disposed back-to-back with the first liquid crystal display panel, having a third transparent substrate, a fourth transparent substrate, and a second liquid crystal layer sandwiched between the third and fourth transparent substrates; Liquid crystal display panel,
- a light control layer provided on the second liquid crystal display panel side on the second transparent substrate, and a light source
- the light incident on the second transparent substrate from the light source is reflected by the reflection layer, and illuminates the second liquid crystal display panel through the light control layer.
- the display device preferably further includes a prism sheet disposed between the light control layer and the second liquid crystal display panel.
- the display device preferably further includes a front light disposed outside the first transparent substrate for irradiating the first liquid crystal panel.
- the display device is a display device including a display panel having two transparent substrates facing each other with a liquid crystal interposed therebetween, and one of the transparent substrates, one or the other, guides light. It has a function as a light guide member that emits light, and the light incident on the transparent substrate with the light guide function does not pass through the liquid crystal. It was configured to emit to the outside.
- the display panel By providing the illumination means for illuminating the other display panel in one display panel, the display panel itself can emit illumination light that illuminates the illuminated object, regardless of the pack light device. it can. This eliminates the need for a backlight device, thereby reducing the thickness of the display device.
- the display device according to the present invention is the above-described display device according to the present invention, wherein a reflective layer is provided on the liquid crystal layer side of the transparent substrate with a light guide function, and incident light incident on the transparent substrate with a light guide function is received. The light is reflected by the reflective layer and emitted, and the emitted light is used as illumination light.
- incident light that has entered the transparent substrate with a light guide function can be reflected by the reflecting layer and emitted, and the emitted light can be used as illumination light.
- the object to be illuminated illuminated by the illumination light is the other (for example, sub display panel) display panel, and various information display bodies.
- the display device according to the present invention is the display device according to the present invention described above, wherein a light control member that controls the traveling direction of the light by the concavo-convex shape is provided on the side opposite to the reflective layer of the substrate with a light guide function. Configured.
- incident light incident on the transparent substrate with a light guide function is reflected by the reflection layer and emitted, and the traveling direction of the emitted light is controlled by the light control member to illuminate the target object to be illuminated.
- the display device according to the present invention is configured such that in the above-described display device according to the present invention, the light control member is directly bonded to the substrate with a light guide function.
- control member is directly bonded to the substrate with a light guide function, so that the illumination light of the display panel can be brightened.
- the display device is a display device configured by stacking two display panels having two transparent substrates facing each other with a liquid crystal interposed therebetween. Therefore, the transparent substrate on the other display panel side of one display panel has a function as a light guide member for guiding light, and the light emitted from the transparent substrate with the light guide function is illuminated on the other display panel. Configured to do.
- illumination light for illuminating the other display panel can be emitted from one display panel itself regardless of the backlight device.
- the backlight device is not required, and the thickness of the display device can be reduced accordingly.
- the display device according to the present invention is the display device according to the present invention described above, wherein a reflective layer is provided on the liquid crystal layer side of the transparent substrate with a light guide function, and incident light incident on the transparent substrate with a light guide function is reflected. The light is reflected by the layer and emitted, and the emitted light is used as illumination light.
- the display device according to the present invention is the above-described display device according to the present invention, wherein there are few light control members for controlling the light traveling direction by the uneven shape between the substrate with the light guide function and the other display panel. Both were configured to have one.
- the display device according to the present invention is the above-described display device according to the present invention, wherein the size of the plane of the light control member disposed closest to the substrate with the light guide function is the size of the plane of the other display panel. It was configured to be almost the same.
- the other display panel for example, the sub display panel
- one display panel for example, the main display panel
- the light control member for example, a prism sheet or the like
- the display device according to the present invention is configured such that the display area of one display panel is larger than the display area of the other display panel in the above-described display device according to the present invention.
- the display device according to the present invention is configured such that in the above-described display device according to the present invention, the light control member disposed closest to the light guide function substrate is directly bonded to the light guide function substrate. did.
- control member is directly bonded to the substrate with a light guide function to form one display panel, and the illumination light of the one display panel can be brightened.
- the display device is the display device according to the present invention described above, wherein the light source is arranged on the side of the substrate with the light guide function.
- the light from the light source has the light guide function.
- the incident light is incident on the substrate, and the incident light is reflected by the reflecting layer and emitted, and the traveling direction of the emitted light can be controlled by the light control member to be the illumination light of the other display panel.
- the display device according to the present invention is the above-described display device according to the present invention.
- a front light that emits the illumination light of the one display panel is arranged outside the one display panel.
- one display panel is illuminated with the illumination light emitted from the front light, display is performed on one display panel, and the other display panel is illuminated with illumination light from one display panel.
- display on the other display panel can be performed.
- the display device is the above-described display device according to the present invention, wherein the front light includes a light guide member, and the surface portion of the light guide member opposite to the one display panel is provided.
- a light control layer for controlling the traveling direction of light is provided, and a light source is disposed on one side of the light guide member. Light emitted from the light source is incident on the light guide member and reflected by the light control layer. It was made to radiate
- the light is reflected by the reflective layer, returned to the light control layer on the incident side through the same path as the incident light, and visually recognized on the viewer side.
- the front light source is turned on, and this light enters the light guide member from the light source and then enters the light control layer from the light guide member. Then, it is reflected by the surface of the light control layer, enters the light guide member again, and enters one display panel. After that, the light is reflected by the reflective layer, returned to the light control layer on the incident side through the same path as when incident, and visually recognized on the viewer side. In such a configuration, the light use efficiency is thus improved.
- the display device includes one display having a configuration in which a first transparent substrate having electrodes and a second transparent substrate having electrodes are opposed to each other with a liquid crystal layer interposed therebetween.
- the second transparent substrate located on the other display panel side of one display panel is provided with a reflective layer on the liquid crystal layer side. Is characterized in that a prism sheet covering at least the display area of the other display panel is disposed on the opposite surface portion, and a light source is disposed on one side of the second transparent substrate. .
- the light source is incident on the second transparent substrate of one display panel, is then reflected by the light reflecting layer, and is incident on the prism sheet again from the second transparent substrate.
- the light incident on the prism is reflected at the boundary between the light control layer and the air by changing the emission angle, is incident on the second transparent substrate again, is reflected by the light reflective layer again, and is reflected on the second transparent substrate.
- the light passes through the prism sheet, passes through the third transparent substrate of the other display panel, enters the liquid crystal layer, and passes through the fourth transparent substrate.
- a display device includes a display panel having a configuration in which an electro-optic conversion member is sealed between two substrates having opposing electrodes.
- the display panel has a function as a light guide member for guiding light to the display panel, and light emitted from the substrate with a light guide function having the function as a light guide member mainly passes through another panel different from the display panel. It was configured to illuminate.
- a reflective layer is disposed on the surface opposite to the surface facing the other panel of the light guide function substrate, and the reflection layer transmits light incident on the light guide function substrate to the other surface.
- the electro-optic conversion member is configured to reflect light on the panel side so that light does not travel.
- At least one light control member for controlling the traveling direction of light by the uneven shape is provided between the substrate with a light guide function and the other panel.
- one display panel has the illumination means, one display panel itself can emit illumination light for illuminating the other display panel, regardless of the backlight device. .
- the backlight device is not required, and the thickness of the display device can be reduced correspondingly.
- the illumination light for illuminating the other display panel can be obtained by one display panel itself, regardless of the backlight device. Can emit light.
- the backlight device is not required, and the thickness of the display device can be reduced accordingly.
- the display device of the present invention when the size of the other display panel (for example, the sub display panel) is smaller than the one display panel (for example, the main display panel), the other display panel is displayed.
- the other display panel By providing a light control member over substantially the entire display area of the panel, light is not emitted from places other than the light control member, and light can be used effectively. That is, even if the size of the other display panel is smaller than that of the other display panel, light is not emitted from unnecessary portions, so that the use efficiency of light for illuminating the other display panel is improved.
- the front light that emits the illumination light of the one display panel is arranged outside the one display panel, so that the illumination light emitted by the front light is emitted.
- One display panel can be illuminated and displayed on this one display panel, and the other display panel can be illuminated with illumination light from one display panel and displayed on the other display panel.
- FIG. 1 is a perspective view of a display device according to a first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view of the display device shown in FIG.
- FIG. 3 is a plan view of the display device shown in FIGS. 2, 9, and 11 viewed from the B direction.
- FIG. 4 is an enlarged view of part A in the display device shown in FIGS. 2, 9, and 11.
- FIG. 5 is a perspective view of a prism sheet constituting the light control layer.
- FIG. 6 is a cross-sectional view showing an adhesion state between the prism sheet and the second transparent substrate.
- FIG. 7 is a cross-sectional view showing a state in which the prism sheet and the second transparent substrate are integrally formed.
- FIG. 8 is a perspective view of a display device according to the second embodiment of the present invention.
- FIG. 9 is a schematic cross-sectional view of the display device shown in FIG.
- FIG. 10 is a perspective view of a display device according to the third embodiment of the present invention.
- FIG. 11 is a schematic cross-sectional view of the display device shown in FIG.
- FIG. 12 is a perspective view of a prism sheet used for the front light.
- FIG. 13 is a schematic cross-sectional view of a display device according to a fourth embodiment of the present invention.
- FIG. 14 is a schematic cross-sectional view of a display device according to a fifth embodiment of the present invention.
- FIG. 15 is a diagram for explaining the function of the light control layer.
- FIG. 16 is an explanatory diagram of the configuration of the mobile phone.
- Figure 17 is a cross-sectional view of a conventional double-sided display type liquid crystal display device
- FIG. 18 is a cross-sectional view of a conventional liquid crystal display device.
- FIG. 1 is a perspective view of a display device 1 according to the first embodiment of the present invention
- FIG. 2 is a schematic sectional view thereof.
- the display device 1 includes a first display panel 101, and an illuminated body K such as a display sheet on which characters and pictures are drawn on a transmissive film board.
- the first display panel 10 0 1 is a reflective liquid crystal display panel.
- the first transparent substrate 1 10 on the viewer side, the second transparent substrate 1 1 1 on the illumination side, and the liquid crystal layer 1 1 2 is provided.
- the first transparent substrate 110 has a configuration in which a first electrode made of ITO, which is a transparent electrode material, and an alignment film (both not shown) are formed on a glass plate.
- the second transparent substrate 11 1 1 includes a reflective layer 1 13 made of aluminum, a protective film made of acrylic material (not shown), and a second electrode made of ITO, which is a transparent electrode material (STN type).
- a strip-shaped transparent electrode in the case of an active type liquid crystal device, an active element and a display electrode (not shown), and an alignment film disposed on the liquid crystal side surface of the electrode Has a configuration formed on a glass plate.
- the first display panel 101 of the display device 2 shown in FIG. 8 is configured as an STN type liquid crystal device.
- the reflection layer 1 13 preferably has a function of sufficiently reflecting light incident on the second transparent substrate 1 1 1 from the light source 1 16 as will be described later. Specifically, the transmittance from the second transparent substrate 1 11 1 side toward the viewing side of the first display panel 10 1 1 is preferably 10% or less. In addition, about the characteristic of this reflection layer 1 1 3, about the display apparatus 2-mentioned later The same applies to 5.
- FIG. 1 there is a gap between the light source 1 1 6 and the second transparent substrate 1 1 1.
- the light source 1 1 6 and the second transparent substrate 1 1 1 1 are close to or in contact with each other so that there is no gap (see FIG. 13). This also applies to the following drawings.
- the outer periphery of the first transparent substrate 110 and the second transparent substrate 11 1 1 are bonded to each other with a sealing material 1 14, and the liquid crystal layer 1 12 is sandwiched therebetween.
- the light control layer is composed of a prism sheet or the like having a function of projecting incident light as light having a predetermined directivity. 1 1 5 Force is directly fixed to the second transparent substrate 1 1 1. .
- the area of the light control layer 1 15 is approximately equal to the display area of the object K to be illuminated. Therefore, a portion 1 1 1 a (see FIG. 3) without the light control layer 1 1 5 exists on the surface of the second transparent substrate 1 1 1.
- the light control layer 1 1 5 is formed by attaching a prism sheet 1 1 7 having a thickness of 100 m on the second transparent substrate 1 1 1 with an acrylic adhesive. Formed. On the surface of the prism sheet 1 17, grooves 1 15 A having a depth of 20 / xm and a pitch of 30 0 111 are formed. The shape of the groove 1 15 A is an unequal triangular shape, and has two inclined surfaces 1 1 5 B and 1 15 C. Note that the thickness, depth, and pitch of the prism sheet are not limited to the above values, and can be appropriately changed to optimum values. Further, the light control layer 115 may be made of acryl resin or a diffusion sheet.
- the light source 1 1 6 is arranged close to the side edge of the second transparent substrate 1 1 1.
- Light source 1 1 6 is a second transparent LED that has a function of guiding LEDs from a plurality of LEDs in parallel and a diffuser plate. It is configured to irradiate the substrate 1 1 1.
- the light source 1 1 6 has an LED facing the side surface of the second transparent substrate 1 1 1, a linear (rectangular) light guide member is disposed, and both ends facing the extending direction of the linear light guide member
- a light source may be arranged in each of the sections, guided by a linear light guide, and emitted from one surface in the extending direction of the linear light guide member.
- the light source 116 can emit light with a relatively uniform brightness distribution on the edge of the glass, and the brightness distribution of the emitted light from the light control layer 115 can be further uniformized.
- the second transparent substrate 11 1 1 functions as a transparent substrate with a light guide function. Accordingly, the second transparent substrate 1 1 1, the reflection layer 1 1 3, the light control layer 1 1 5, and the light source 1 1 6 constitute an illuminating unit that illuminates the illuminated body K.
- 1 40 represents the locus of light from the external light source
- 1 4 2 and 1 4 3 represent the locus of light from the light source 1 16.
- a display method on the first display panel 10 1 will be described.
- outside light 140 When the amount of light from outside light is relatively large, display is possible using outside light, and the operation at this time will be described according to outside light 140.
- the external light 140 is transmitted through the first transparent substrate 1 10 of the first display panel 1 0 1 and is incident on the liquid crystal layer 1 1 2. After that, the light is reflected by the reflective layer 1 1 3 and returned to the first transparent substrate 1 1 0 on the incident side through the same path as the incident light. At this time, observation is performed on the viewing side of the first display panel 1 0 1 In this case, for example, ⁇ (black) is displayed when no voltage is applied to the electrodes provided on the first transparent electrode 1 1 0 and the second transparent electrode 1 1 1, respectively. Can be set to In that case, the bright (white) display will cause a potential difference between the electrodes, so that each said electrode is external This is achieved by applying a voltage from the circuit and applying a potential difference across the liquid crystal layer 1 1 2.
- Second transparent substrate 1 1 Light 1 4 2 incident on the light control layer 1 1 5 from the 1 side is incident on the inclined surface of the groove 1 1 5 A of the light control layer 1 1 5 as shown in FIGS. Reflected by 1 1 5 B, the reflection angle changes, and is incident on the second transparent substrate 1 1 1 again. The light 1 4 2 is reflected again by the light reflection layer 1 1 3, passes through the light control layer 1 1 5, and becomes illumination light F that illuminates the illuminated body K.
- Light 14 3 in FIG. 2 is light emitted from the light source 1 16 to the side of the light reflecting layer 1 13 3 formed on the second transparent substrate 1 1 1 of the first display panel 1 0 1.
- Light 1 4 3 is reflected by the inclined surface 1 1 5 B when incident on the inclined surface 1 1 5 C of the groove 1 1 5 A of the light control layer 1 1 5 as shown in FIG. Reflected by 1 3 (see Fig. 2) and emitted to the object K to be illuminated.
- the incident angle of the light 1 4 3 is shallow, so the light 1 4 3 is totally reflected in the second transparent substrate 1 1 1 and does not go out.
- the display device 1 when the light source 1 1 6 is turned on, light enters the second transparent substrate 1 1 1 of the one display panel 1 0 1 from the light source 1 1 6, and the incident light is light.
- the light is reflected by the reflective layer 113 and is incident on the light control layer 115 (for example, a prism layer or a prism sheet) from the second transparent substrate 1111 again.
- the light incident on the light control layer 1 1 5 is reflected at the boundary between the light control layer 1 1 5 and air by changing the emission angle, and is incident on the second transparent substrate 1 1 again.
- the light incident on the second transparent substrate 1 1 1 again is reflected again by the light reflecting layer 1 1 3, passes through the second transparent substrate 1 1 1, passes through the light control layer 1 1 5, and is illuminated. Irradiate body K.
- the first display panel 10 1 since the first display panel 10 1 has the illumination means, the first display panel 1 0 1 itself does not depend on the backlight device.
- the body can emit illumination light that illuminates the body K to be illuminated.
- the backlight device is not necessary, and the thickness of the display device can be reduced correspondingly.
- the light incident on the second transparent substrate 1 1 1 of the one display panel 1 0 1 from the light source 1 1 6 is Since light is hardly emitted from the place where the light control layer 15 is not disposed (the portion 1 1 1 a where the light control layer 1 1 5 is not present), the light can be used effectively. That is, even if the size of the object to be illuminated K is smaller than that of the first display panel 10 0 1, almost no light is emitted from unnecessary portions other than the object to be illuminated, so that the object to be illuminated K is illuminated. Use efficiency of light.
- the illuminated body K in the display device 1 according to the present invention is not limited to the above-described display sheet, and may be an advertising panel, a film photograph, a character or a symbol display body.
- the light control layer 1 15 in the display device 1 according to the present invention is obtained by acrylic coating a prism sheet 1 1 7 having a thickness of ⁇ ⁇ ⁇ on the second transparent substrate 1 11 1. Affixed with a system adhesive.
- the present invention is not limited to this, and as shown in FIG. 7, the light control layer 1 15 is formed on the second transparent substrate 1 1 1 using a mold integrally with the second transparent substrate 1 1 1. May be molded. Further, the light control layer 1 15 is formed by forming projections for unevenness Z scattering on the second transparent substrate 1 11 1 (glass member or plastic member) by sandblasting, cutting, etching or the like. It may be configured.
- the display device 1 includes an electro-optic conversion member (1 1 2 in FIG. 1) between two substrates (1 1 0 and 1 1 1 in FIG. 1) having opposing electrodes.
- a display panel (1 0 1 in FIG. 1) having a sealed configuration, and the substrate (1 1 1 in FIG. 1) serves as a light guide member for guiding light.
- the light emitted from the light guide function-equipped board (1 1 1 in FIG. 1) that has the function of the light guide member is mainly different from the display panel (1 0 1 in FIG. 1). It is characterized by illuminating K) in Fig. 1.
- a reflective layer (1 1 3 in Fig. 1) is placed on the surface opposite to the surface facing the other panel (K in Fig.
- At least one light control member (1 15 in FIG. 1) for controlling the light traveling direction by the uneven shape is provided between the substrate with a light guide function and another panel.
- the light control layer 1 15 may be provided but also two or more light control layers may be provided.
- the direction of the ridge line of the prism of the first light control layer and the direction of the ridge line of the prism of the second light control layer may be shifted from the perpendicular direction.
- the bottom surface (substantially plane) of the other prism layer is superimposed on the apex angle of one prism. It is preferable.
- FIG. 8 is a perspective view of a display device 2 according to the second embodiment of the present invention
- FIG. 9 is a schematic sectional view thereof.
- one display panel 10 1 has exactly the same configuration as the display device 1 described above.
- This display device 2 is different from the display device 1 described above in that the second display panel 1 0 2 and the light control This is the point provided with the member 104 layers.
- the display device 2 includes a first display panel 10 1 that is one display panel, a second display panel 10 2 that is the other display panel as an object to be illuminated, And a light control member 104 composed of a prism sheet or the like.
- This prism sheet has a function of emitting incident light as light having a predetermined directivity.
- the first display panel 10 0 1 is a reflective black and white liquid crystal display panel (may be a color liquid crystal display panel), and is the first transparent substrate on the viewing side. 1 1 0, a second transparent substrate 1 1 1 on the illumination side, and a liquid crystal layer 1 1 2.
- the first transparent substrate 110 is composed of a glass plate on which a first electrode made of ITO, which is a transparent electrode material, and an alignment film (both not shown) are formed.
- the second transparent substrate 1 1 1 includes a reflective layer 1 1 3 made of aluminum, a protective film made of acrylic material (not shown), and a second electrode made of ITO which is a transparent electrode material (STN type)
- a strip-shaped transparent electrode in the case of an active type liquid crystal device, an active element and a display electrode) (not shown), and an alignment film disposed on the liquid crystal side surface of the electrode And is formed of a glass plate.
- the first display panel 10 1 of the display device 2 was configured as an STN type liquid crystal device.
- the outer periphery of the first transparent substrate 110 and the second transparent substrate 11 1 1 are bonded together with a sealing material 1 14, and the liquid crystal layer 1 12 is sandwiched therebetween.
- a light control layer 1 15 made of a prism sheet or the like is provided on the outer surface of the second transparent substrate 1 1 1 (surface on the second display panel 10 2 side). It is directly fixed to the second transparent substrate 1 1 1.
- the area of the light control layer 1 1 5 is the display area of the second display panel 1 0 2 The size is almost equal to the area. Therefore, a portion 1 1 1 a (see FIG. 3) where the light control layer 1 1 5 is not present exists on the surface of the second transparent substrate 1 1 1.
- the light control layer 1 1 5 is a glass sheet used for the transparent substrate 1 1 1 and a prism sheet 1 1 7 having a thickness of 100 / xm is pasted with an acrylic adhesive. Is formed.
- a prism sheet 1 1 7 having a thickness of 100 / xm is pasted with an acrylic adhesive. Is formed.
- grooves 1 15 A having a depth of 20 m and a pitch of 30 O zm are formed.
- the shape of the groove 1 1 5 A is an unequal triangular shape and has two inclined surfaces 1 1 5 B and 1 1 5 C. Note that the thickness, depth, and pitch of the prism sheet are not limited to the above values, and can be appropriately changed to optimum values.
- the light source 1 1 6 is arranged close to the side edge of the second transparent substrate 1 1 1.
- the light source 1 16 is configured so that a plurality of LEDs are arranged in parallel, and light from the LEDs is irradiated to the second transparent substrate 1 1 1 having a light guiding function through a diffusion plate.
- the light source 1 1 6 has an LED facing the side surface of the second transparent substrate 1 1 1, a linear (rectangular) light guide member is disposed, and both ends facing the extending direction of the linear light guide member
- a light source may be arranged in each of the sections, guided by a linear light guide, and emitted from one surface in the extending direction of the linear light guide member.
- the light source 1 16 can emit light with a relatively uniform luminance distribution on the edge of the glass, and the luminance distribution of the light emitted from the light control layer 1 15 can be made more uniform.
- the second transparent substrate 1 1 1 functions as a transparent substrate with a light guide function.
- the second transparent substrate 1 1 1, the reflective layer 1 1 3, the light control layer 1 1 5, and the light source 1 1 6 force constitute the illumination means for illuminating the second display panel 1 0 2 that is the illuminated body Yes.
- the second display panel 1 0 2 is a transmissive color liquid crystal display panel (monochrome The third transparent substrate 1 3 0, the fourth transparent substrate 1 3 1, the third and fourth transparent substrates 1 3 0, and 1 3 1 between the liquid crystal layers 1 3 3 It has the seal part 1 3 2 for sealing.
- a color filter (not shown) is provided on the liquid crystal layer 1 3 3 side of the third transparent substrate 1 3 0, and the front side of the third transparent substrate 1 3 0 and the fourth transparent substrate 1 3 1
- a polarizing plate (not shown) is provided on the back side.
- a transparent electrode (not shown) is provided on the liquid crystal layer 1 3 3 side of the second transparent substrate 1 3 0, and the liquid crystal layer 1 3 3 of the fourth transparent substrate 1 3 1.
- a strip-shaped transparent electrode is provided in the case of an STN type liquid crystal device, and an active element and a display electrode are provided in the case of an active type liquid crystal device.
- the second display panel 10 2 is configured as an STN type liquid crystal device.
- 1 4 0 represents the trajectory of light from the external light source
- 1 4 2 and 1 4 3 represent the trajectory of light from the light source 1 1 6.
- a display method on the first display panel 10 1 will be described.
- the external light 14 0 is transmitted through the first transparent substrate 1 1 0 of the first display panel 1 0 1 and is incident on the liquid crystal layer 1 1 2. Thereafter, the light is reflected by the reflective layer 1 13 and returned to the first transparent substrate 1 10 on the incident side through the same path as the incident light.
- the electrodes provided on the respective substrates of the first transparent electrode 1 1 0 and the second transparent electrode 1 1 1 It can be set to display ⁇ (black) with no voltage applied.
- the bright (white) display applies a voltage from an external circuit to each of the electrodes so as to generate a potential difference between the electrodes, thereby applying a potential difference to both ends of the liquid crystal layer 1 1 2. And realized.
- the illumination light F passes through the prism sheet 10 4 to become brighter light, passes through the third transparent substrate 1 3 0 of the second display panel 10 2, and enters the liquid crystal 1 3 3. Then, it passes through the fourth transparent substrate 1 3 1.
- the second display panel 102 On the viewing side of the second display panel 102, for example, in a state where no voltage is applied to the electrodes provided on the substrates of the third transparent electrode 130 and the fourth transparent electrode 131, respectively. , Can be set to display dark (black). In that case, bright (white) display is realized by applying a voltage difference to both ends of the liquid crystal layer 133 by applying a voltage from an external circuit to each of the electrodes so as to generate a potential difference between the electrodes.
- the light 14 3 shown in FIG. 9 is emitted from the light source 1 1 6 to the first transparent substrate 1 1 0 formed on the second transparent substrate 1 1 1 of the first display panel 1 0 1.
- the light of the light control layer 1 1 5 is reflected by the inclined surface 1 1 5 B when incident on the inclined surface 1 1 5 C of the groove 1 1 5 A Reflected by the reflective layer 1 1 3 to the second display panel 1 0 2 It is emitted.
- the incident angle of the light 1 4 3 is shallow, so the light 1 4 3 is totally reflected inside the second transparent substrate 1 1 1 and does not go out.
- the display device 2 When the light source 1 1 6 is turned on, light enters the second transparent substrate 1 1 1 of one display panel 1 0 1 from the light source 1 1 6, and the incident light is reflected by the light reflection layer 1 1 3, The light enters the light control layer (prism sheet) 1 1 5 again from the second transparent substrate 1 1 1.
- the light incident on the light control layer 1 1 5 is reflected at the boundary between the light control layer 1 1 5 and air by changing the emission angle, and is incident on the second transparent substrate 1 1 1 again.
- the light incident on the second transparent substrate 1 1 1 again is reflected again by the light reflecting layer 1 1 3, passes through the second transparent substrate 1 1 1, and passes through the light control layer 1 1 5. Is transmitted through the third transparent substrate 1 3 0 of the display panel 10 2, is incident on the liquid crystal layer 1 3 3, and is transmitted through the fourth transparent substrate 1 3 1.
- the electrodes provided on the respective substrates of the third transparent electrode 1 3 0 and the fourth transparent electrode 1 3 1 It can be set to display ⁇ (black) when no voltage is applied.
- bright (white) display is realized by applying a voltage difference from the external circuit to each of the electrodes so as to generate a potential difference between the electrodes, and applying a potential difference to both ends of the liquid crystal layer 1 33. .
- the first display panel 10 1 has the illumination means, the first display panel 1 0 1 itself and the second display panel 1 0 0 independently of the backlight device. Illumination light for illuminating 2 can be emitted.
- the backlight device is not necessary, and the thickness of the display device can be reduced correspondingly.
- the display device 2 As shown in FIG. 3 and FIG.
- the light incident on the second transparent substrate 1 1 1 of one display panel 1 0 1 from the light source 1 1 6 is the place where the light control layer 1 1 5 is not provided (the part without the light control layer 1 1 5 1 1 1 a.) Hardly emits light, so light can be used effectively. In other words, even if the size of the second display panel 10 2 is smaller than that of the first display panel 10 1, almost no light is emitted from unnecessary portions, so that the second display panel 1 0 2 is illuminated. Yes Light usage efficiency is good.
- the first display panel 10 0 1 is a monochrome display and the second display panel 10 2 is a color display, but the first display panel 1 0 1 is a color display.
- One display and the second display panel 10 2 may be displayed in black and white, the first display panel 1 0 1 may be displayed in color and the second display panel 1 0 2 may be displayed in color, or The first display panel 10 0 1 may be displayed in black and white and the second display panel 10 2 may be displayed in black and white. Even in the case of these alternatives, the same effect as that of the display device 2 according to the present invention can be obtained.
- the light control layer 1 15 in the display device 2 according to the present invention is a prism sheet 1 1 7 having a thickness of 100 m on a second transparent substrate 1 1 1.
- the present invention is not limited to this, and the light control layer 1 15 is formed on the second transparent substrate 1 1 1 using a mold integrally with the second transparent substrate 1 1 1 as shown in FIG. It may be molded.
- the light control layer 115 may be formed on the second transparent substrate 1111 (glass member or plastic member) by cutting, etching or the like.
- the first display panel 101 and the second display panel 102 are configured as STN type liquid crystal display panels, but both are configured as active type liquid crystal display panels. It may be configured, one display panel is STN type and the other table The display panel may be an active type. Even in these alternatives, the same effect as that of the display device 2 according to the present invention can be obtained.
- FIG. 10 is a perspective view of a display device 3 according to the third embodiment of the present invention
- FIG. 11 is a sectional view thereof.
- the display device 3 includes a first display panel 1 0 1, a second display panel 1 0 2, a prism sheet 1 0 4, and a first display panel 1 0 1.
- the front light is placed on the viewer's viewing side.
- first display panel 10 1, the second display panel 10 2, and the prism sheet 10 4 have the same configuration as the display device 2 according to the present invention described above, the same reference numerals are used for description. Omitted.
- the front light 10 3 includes a light source 10 5 and a light guide plate 10 6 as a light guide member.
- the area of the light guide plate 106 is substantially equal to the display area of the first display panel 101.
- a light control layer 120 is provided over the entire surface of the light guide plate 106 on the viewing side (upward in FIG. 10).
- the light control layer 120 is formed by, for example, sticking a prism sheet 1 1 8 with a thickness of 100 X m with an acrylic adhesive on a glass member or a plastic member used for the light guide plate 106. It is.
- grooves 12 O A having a depth of 20 m and a pitch of 30 O m are formed on the surface of the prism sheet 1 18.
- the shape of the groove 1 2 O A is an inequilateral triangular shape, and has two inclined surfaces 1 2 0 B and 1 2 0 C. Note that the thickness, depth, and pitch of the prism sheet are not limited to the above values, and can be appropriately changed to optimum values.
- the light source 10 5 is arranged in the vicinity of the end of the light guide plate 10 6.
- the light source 1 0 5 has a plurality of LEDs arranged and a diffusion plate The light from the LED is radiated toward the light guide plate 10 6.
- One LED may be used.
- the light source 10 5 has an LED facing the side surface of the light guide plate 10 6, a linear (rectangular) light guide member is arranged, and both ends facing each other in the extending direction of the linear light guide member are respectively lighted.
- a structure may be employed in which a light source is arranged, light is guided by a linear light guide, and light is emitted from one surface in the extending direction of the linear light guide member.
- the light source 10 5 can emit light with a relatively uniform luminance distribution on the edge of the glass, and the luminance distribution of the light emitted from the light control layer 1 15 can be made more uniform.
- external light 14 0 that is incident from the outside of the display device 3 represents a locus of light from the outside
- light 14 1 represents a locus of light from the light source 10
- 1 4 2 and 1 4 3 represent the locus of light from the light source 1 1 6.
- a display method on the first display panel 10 1 will be described.
- outside light 1 4 0 enters the light control layer 1 2 0, passes through the light guide plate 1 0 6, the first transparent substrate 1 1 0 of the first display panel 1 0 1 and enters the liquid crystal layer 1 1 2 To do. Thereafter, the light is reflected by the reflective layer 1 13 and returned to the light control layer 1 20 on the incident side through the same path as the incident light.
- the light 14 1 from the light source 1 0 5 is incident on the light guide plate 1 0 6, and then reflected by the inclined surface 1 2 0 B of the groove 1 2 OA of the light control layer 1 2 0. 6 is transmitted and becomes the illumination light F 1 of the first display panel 10 1.
- the illumination light F 1 passes through the first transparent substrate 1 1 0 of the first display panel 1 0 1 and enters the liquid crystal layer 1 1 2, then reflects off the light reflection layer 1 1 3, and again returns to the liquid crystal.
- the light passes through the layer 1 1 2 and the first transparent substrate 1 1 0, enters the light guide plate 1 0 6, passes through the light control layer 1 2 0, and exits to the viewing side. At this time, when observed above the viewing side in FIG.
- the voltage is applied to the electrodes provided on the respective substrates of the first transparent electrode 110 and the second transparent electrode 11 1. It can be set to display ⁇ (black) when not applied. In that case, the bright (white) display is performed by applying a voltage from the external circuit to each of the electrodes so as to generate a potential difference between the electrodes, and applying a potential difference to both ends of the liquid crystal layer 1 1 2. Realize.
- the light 1 1 2 from the light source 1 1 6 is incident on the second transparent substrate 1 1 1, then reflected by the light reflecting layer 1 1 3, and from the second transparent substrate 1 1 1 to the light control layer 1 1 5 Is incident on.
- the light incident on the light control layer 1 1 5 is reflected by the inclined surface 1 1 5 B of the groove 1 1 5 A of the light control layer 1 1 5 as shown in FIG.
- the light again enters the second transparent substrate 1 1 1, is reflected again by the light reflecting layer 1 1 3, passes through the second transparent substrate 1 1 1, passes through the light control layer 1 1 5, and then passes through the second transparent substrate 1 1 1. It becomes the illumination light F of the display panel 1 0 2.
- the illumination light F passes through the prism sheet 10 4 to become brighter light, passes through the third transparent substrate 1 3 0 of the second display panel 10 2, and enters the liquid crystal layer 1 3 3. Incident light is transmitted through the fourth transparent substrate 1 3 1.
- the electrodes provided on the respective substrates of the third transparent electrode 1 3 0 and the fourth transparent electrode 1 3 1 It can be set to display ⁇ (black) when no voltage is applied. In that case, bright (white) display is realized by applying a voltage from the external circuit to each of the electrodes so as to generate a potential difference between the electrodes, and applying a potential difference to both ends of the liquid crystal layer 1 33. .
- the light 14 3 in FIG. 11 is light emitted from the light source 1 1 6 to the light reflecting layer 1 1 3 formed on the second transparent substrate 1 1 1 of the first display panel 1 0 1.
- the incident angle of the light 1 4 3 is shallow, the light 1 4 3 hardly reflects outside the second transparent substrate 1 1 1 and goes out.
- the outside light 1 4 0 enters the light control layer 1 2 0 and passes through the light guide plate 1 0 6. Incident on the first display panel 1 0 1. Thereafter, the light is reflected by the reflecting layer 113 and returned to the light control layer 120 on the incident side through the same path as the incident light, and is visually recognized on the viewing side.
- the light source 10 5 of the front light 10 3 when the amount of light from outside light is small (when the environment is dark), the light source 10 5 of the front light 10 3 is turned on. Light from the light source 1 0 5 enters the light guide plate 1 0 6, enters the light control layer 1 2 0 from the light guide plate 1 0 6, reflects off the surface of the light control layer 1 2 0, and again The light enters the light guide plate 10 6 and enters the first display panel 10 1. After that, the light incident on the first display panel 10 0 1 is reflected on the reflective layer. Reflected by 1 1 3 and returned to the light control layer 120 on the incident side through the same path as the incident light, and viewed on the viewer side. In this way, the light utilization efficiency is improved.
- FIG. 13 is related to the fourth embodiment of the present invention.
- 3 is a schematic sectional view of a display device 4.
- the difference between the display device 4 shown in FIG. 13 and the display device 2 shown in FIG. 9 is that the display device 4 has an organic EL display 2 0 provided with a light control layer 1 1 5 instead of the display panel 1 0 1 2 0 This is a point having 0. Since the light source 1 1 6, the light control member 10 4, and the second display panel 1 0 2 in the display device 4 are the same as the display device 2, description thereof is omitted.
- the organic EL display 200 has a first transparent substrate 2 1 0 placed on the viewing side, an anode (IT ⁇ ) 2 1 1 formed on the first transparent substrate 2 1 0, and a hole transport layer 2 1 2, a light emitting layer 2 1 3, an electron transport layer 2 1 4, a cathode 2 1 4, a second transparent substrate 2 2 0, and the like.
- the holes injected from the anode 2 1 1 and the electrons injected from the negative electrode 2 1 4 recombine in the light emitting layer 2 1 3 to excite the organic molecules and emit light.
- the cathode 2 1 4 of the organic EL display 2 0 0 functions as a metal mirror to return the light generated in the light emitting layer 2 1 3 back to the viewing side to obtain brightness. It is configured. That is, the cathode 2 1 4 functions in the same manner as the reflection layer 1 1 3 in FIG. 9 for the light 1 4 2 and 1 4 3 from the light source 1 1 6. Therefore, the light source 1 1 6, the second transparent substrate 2 2 0 of the organic EL display 2 0 0, and the light control layer 1 1 5 are used as the illumination means of the second display panel 1 0 2 in the case of the display device 2 Like, it works.
- the organic EL display 200 since the organic EL display 200 has the illumination means, the organic EL display 200 itself itself does not depend on the backlight device. Illumination light for illuminating the display panel 1 0 2 can be emitted. Therefore, the display device 4 according to the present invention does not require a backlight device, and accordingly, the thickness of the display device can be reduced.
- FIG. 14 is a schematic sectional view of a display device 5 according to the fifth embodiment of the present invention.
- the difference between the display device 5 shown in FIG. 14 and the display device 2 shown in FIG. 9 is that the display device 5 has a microphone mouth capsule type electric device having a light control layer 1 1 5 instead of the display panel 1 0 1. This is a point having an electrophoretic display 300. Since the light source 1 1 6, the light control member 10 4, and the second display panel 10 2 in the display device 5 are the same as the display device 2, description thereof is omitted.
- Microphone mouth capsule-type electrophoretic display 300 has a transparent cover 3 1 0 disposed on the viewing side, a first transparent substrate 3 1 0 having a first transparent electrode, a capsule ink layer 3 1 2, And a second transparent substrate 3 1 3 having a second electrode.
- Microcapsule type electrophoretic display 300 has a display by selectively attracting different colored (white and black) capsule inks with different charges to the first and second transparent electrodes. Do.
- the second electrode is configured to function as a metal mirror. That is, the second electrode functions in the same manner as the reflection layer 1 1 3 in FIG. 9 for the lights 1 4 2 and 1 4 3 from the light source 1 1 6. Therefore, light source 1 1 6, microcapsule type electric
- the second substrate 3 1 3 and the light control layer 1 15 of the electrophoretic display 300 function as illumination means for the second display panel 10 2 as in the case of the display device 2.
- the microcapsule type electrophoretic display 300 since the microcapsule type electrophoretic display 300 has the illumination means, the microcapsule type electrophoretic display 300 does not depend on the backlight device. By itself, illumination light for illuminating the second display panel 10 2 can be emitted. Therefore, the display device 5 according to the present invention does not require a backlight device, and accordingly, the thickness of the display device can be reduced.
- the display device using the organic EL display 20 0 (see FIG. 13) other than the liquid crystal display panel and the microcapsule electrophoretic display 30 (see FIG. 14) has been described.
- the present invention has a reflective layer and a transparent substrate and functions as an illuminating device for other display panels
- other display devices can be used.
- an electro-powder fluid display or FED Fieldy Emssi on Disp 1 ay
- FED Fieldy Emssi on Disp 1 ay
- An electro-powder fluid display refers to a display device that can form an image by inserting two-color electronic fluids that have intermediate characteristics between particles and fluid between two electrodes.
- F E D is a so-called electron emission display.
- FIG. 15 is a diagram for explaining the function of the light control layer 1 15.
- the difference between the display device 2 shown in FIG. 15 and the display device 2 shown in FIG. 9 is that the light control layer 1 15 is shifted from the position in FIG. 9 (shown as 5 0 0 in the figure) to the left in the figure, The only point is that the light control member 10 4 and the second display panel 10 2 are moved in accordance with the movement of the layers 1 15.
- the light source 1 1 6 is incident on the second transparent substrate 1 1 1 1 Since the incident angle of the light is shallow, it can hardly be reflected outside the second transparent substrate 11 1 outside the place where the light control layer 1 15 exists. Therefore, the position (area) at which light is to be emitted from the second transparent substrate 1 1 1 1 can be freely determined by the light control layer 1 1 5. As a result, the effect of increasing the degree of freedom for designing the size and position of the second display panel can be obtained.
- the display device according to the present invention since one display panel has the illumination means, one display panel itself emits illumination light for illuminating the other display panel, regardless of the knocklight device. be able to.
- the backlight device is not necessary, and the thickness of the display device can be reduced correspondingly. Therefore, the display device according to the present invention is particularly useful as a display device or the like for double-sided display in which two display panels are arranged back to back so that each display panel can be viewed.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/660,370 US8049840B2 (en) | 2004-08-17 | 2005-08-17 | Double-sided display apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-237052 | 2004-08-17 | ||
| JP2004237052A JP4647261B2 (ja) | 2004-08-17 | 2004-08-17 | 表示装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006019174A1 true WO2006019174A1 (ja) | 2006-02-23 |
Family
ID=35907556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/015302 Ceased WO2006019174A1 (ja) | 2004-08-17 | 2005-08-17 | 表示装置 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8049840B2 (ja) |
| JP (1) | JP4647261B2 (ja) |
| WO (1) | WO2006019174A1 (ja) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090019561A (ko) * | 2007-08-21 | 2009-02-25 | 삼성전자주식회사 | 온도에 따라 발광하는 휴대용 단말 및 이를 이용한디스플레이 제어 방법 |
| TWI372906B (en) * | 2008-04-08 | 2012-09-21 | Au Optronics Corp | Multi-view liquid crystal display and the driving method thereof |
| JP5516319B2 (ja) * | 2010-10-20 | 2014-06-11 | ソニー株式会社 | 照明装置および表示装置 |
| US9201452B2 (en) * | 2012-02-28 | 2015-12-01 | Apple Inc. | Electronic device with illuminated logo structures |
| US9709725B2 (en) * | 2013-03-15 | 2017-07-18 | Cree, Inc. | Luminaire utilizing waveguide |
| US10001812B2 (en) * | 2015-03-05 | 2018-06-19 | Apple Inc. | Chin plate for a portable computing device |
| CN106773321A (zh) * | 2017-02-17 | 2017-05-31 | 深圳市华星光电技术有限公司 | 一种轻薄型液晶显示装置及其背光模组与制作方法 |
| CN208239762U (zh) * | 2018-03-02 | 2018-12-14 | 扬升照明股份有限公司 | 光源模块及双荧幕显示装置 |
| JP7109955B2 (ja) * | 2018-03-27 | 2022-08-01 | 株式会社ジャパンディスプレイ | 表示装置 |
| JP7158899B2 (ja) | 2018-06-06 | 2022-10-24 | 株式会社ジャパンディスプレイ | 電気光学装置 |
| CN112889105B (zh) * | 2018-07-28 | 2022-06-14 | 华为技术有限公司 | 一种补光模组、显示屏、显示装置及终端 |
| JP2022024203A (ja) | 2018-11-26 | 2022-02-09 | 株式会社ジャパンディスプレイ | 表示装置 |
| JP7281329B2 (ja) * | 2019-04-16 | 2023-05-25 | 株式会社ジャパンディスプレイ | 表示装置 |
| CN211741786U (zh) | 2020-03-19 | 2020-10-23 | 中强光电股份有限公司 | 双屏幕显示装置 |
| CN112987419B (zh) * | 2021-04-13 | 2023-09-15 | 成都天马微电子有限公司 | 一种显示装置及其制造方法 |
| US20220404668A1 (en) * | 2021-06-22 | 2022-12-22 | Sharp Kabushiki Kaisha | Video processer and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01265289A (ja) * | 1988-04-16 | 1989-10-23 | Canon Inc | 表示装置 |
| JP2004046050A (ja) * | 2002-05-15 | 2004-02-12 | Mitsubishi Electric Corp | 液晶表示装置 |
| JP2004045727A (ja) * | 2002-07-11 | 2004-02-12 | Citizen Watch Co Ltd | 液晶表示装置 |
| JP2004126196A (ja) * | 2002-10-02 | 2004-04-22 | Toshiba Corp | 液晶表示装置 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2770350B2 (ja) * | 1988-10-20 | 1998-07-02 | 富士通株式会社 | 液晶表示装置 |
| JPH07301829A (ja) | 1994-03-11 | 1995-11-14 | Hoya Corp | 光スイッチ |
| JPH08254719A (ja) | 1995-03-15 | 1996-10-01 | Hoya Corp | 光スイッチ |
| JP2001075087A (ja) * | 1999-09-08 | 2001-03-23 | Citizen Watch Co Ltd | 液晶表示装置 |
| US7301591B2 (en) * | 2001-09-28 | 2007-11-27 | Citizen Holdings Co., Ltd. | Liquid crystal display device wherein the number of light emitting elements activated differs depending on whether display is performed by the first or second liquid crystal panel |
| JP3599022B2 (ja) * | 2002-01-10 | 2004-12-08 | カシオ計算機株式会社 | 液晶表示装置 |
| JP2004144990A (ja) * | 2002-10-24 | 2004-05-20 | Alps Electric Co Ltd | 両面発光型液晶表示モジュール |
| JP3719433B2 (ja) * | 2002-10-30 | 2005-11-24 | セイコーエプソン株式会社 | 表示装置及び電子機器 |
| JP4178913B2 (ja) * | 2002-10-31 | 2008-11-12 | セイコーエプソン株式会社 | 表示装置及び電子機器 |
-
2004
- 2004-08-17 JP JP2004237052A patent/JP4647261B2/ja not_active Expired - Fee Related
-
2005
- 2005-08-17 US US11/660,370 patent/US8049840B2/en not_active Expired - Fee Related
- 2005-08-17 WO PCT/JP2005/015302 patent/WO2006019174A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01265289A (ja) * | 1988-04-16 | 1989-10-23 | Canon Inc | 表示装置 |
| JP2004046050A (ja) * | 2002-05-15 | 2004-02-12 | Mitsubishi Electric Corp | 液晶表示装置 |
| JP2004045727A (ja) * | 2002-07-11 | 2004-02-12 | Citizen Watch Co Ltd | 液晶表示装置 |
| JP2004126196A (ja) * | 2002-10-02 | 2004-04-22 | Toshiba Corp | 液晶表示装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US8049840B2 (en) | 2011-11-01 |
| US20070206137A1 (en) | 2007-09-06 |
| JP4647261B2 (ja) | 2011-03-09 |
| JP2006058331A (ja) | 2006-03-02 |
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