WO2012102349A1 - マルチディスプレイシステムおよびこれに用いられる透光性カバー - Google Patents
マルチディスプレイシステムおよびこれに用いられる透光性カバー Download PDFInfo
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- WO2012102349A1 WO2012102349A1 PCT/JP2012/051706 JP2012051706W WO2012102349A1 WO 2012102349 A1 WO2012102349 A1 WO 2012102349A1 JP 2012051706 W JP2012051706 W JP 2012051706W WO 2012102349 A1 WO2012102349 A1 WO 2012102349A1
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- Prior art keywords
- display
- panel
- translucent cover
- liquid crystal
- boundary
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—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
- G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133331—Cover glasses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
Definitions
- the present invention relates to a display device, and more particularly to a multi-display system configured using a plurality of display devices.
- the liquid crystal display device includes a liquid crystal display panel, a backlight device, a circuit and a power source for supplying various electric signals to the liquid crystal display panel, and a housing for housing these.
- the liquid crystal display panel has a display area in which a plurality of pixels are arranged and a frame area around the display area.
- the frame area is connected to the seal part that bonds the liquid crystal material between the substrates, wiring connected to the gate and source electrodes of the TFT, and an external drive circuit that inputs the signal / scan voltage Terminals for doing so are arranged.
- a black mask light shielding member
- the frame area is an area that does not contribute to display (invalid display portion), and the narrowing of the frame of the liquid crystal display device is progressing year by year, but it is impossible in principle to eliminate the frame area.
- adjacent display panels are connected (connected) outside the edge of the bezel.
- the part provided with the bezel also becomes an invalid display part.
- Such an area that does not contribute to the display around the active area is observed as a black frame between the panel modules when the multi-panel configuration is adopted. For example, when displaying an image including a large object straddling a plurality of panels, it seems that the image quality of the entire multi-panel is degraded by the black frame.
- Patent Document 1 discloses a configuration in which a translucent cover is provided on the viewer side of each display panel in order to display a seamless image as a whole multi-panel display device.
- a curved surface is formed at the edge portion on the viewer side of this translucent cover, and the curved surface portion functions as a lens.
- the curved surface portion (lens portion) of the translucent cover is provided so as to cover the frame region of the display panel and a part of the display region (peripheral display region).
- the light emitted from the pixels arranged in the peripheral display area is refracted in the lens unit, and as a result, an image is observed as if the image is displayed in a part of the frame area, and the image in which the joint is not conspicuous as a whole screen is obtained. Is displayed.
- Patent Document 2 describes a projector that can superimpose a projection image on a portion corresponding to a joint of divided images and obtain a screen in which the boundary of the divided images is not noticeable by adjusting the luminance of the overlapping portion. As described above, it is considered that it is also an effective means to perform image signal processing different from other regions at the edge of the divided image.
- an image / video displayed on each display panel may be referred to as a divided image.
- Patent Document 3 discloses a technique for making a joint inconspicuous by arranging a cylindrical lens between the light source and the liquid crystal display panel at a position near the joint of the panel.
- light from the light source enters the outermost edge portion of the liquid crystal panel via a cylindrical lens. This light passes through the pixels at the outermost edge, and then reaches both sides of the position corresponding to the joint on the front panel, forming a region with high brightness. By doing so, black streaks and black lattice patterns caused by the joints are not noticeable.
- Patent Document 4 shows a configuration in which a Fresnel lens is provided on the viewer side of a plasma display panel arranged adjacently so as to cover the entire panel.
- the projected image from each panel is enlarged and displayed on the front surface of each panel by the Fresnel lens, so that the viewer can see that the image also exists at a position corresponding to the joint of the panels.
- Patent Document 5 discloses a technique of attaching an optical element such as a polarizing film on a liquid crystal panel so as to cover a joint of the liquid crystal panel.
- an optical element such as a polarizing film
- the joint between the liquid crystal panels can be made inconspicuous and the joint can be reinforced.
- the effect of making the joint inconspicuous is not sufficient only by attaching a polarizing film or the like. Therefore, in the multi-display configuration, there is a problem that the joint of the display panel is not conspicuous and the mechanical strength at the joint of the display panel is improved.
- the present invention has been made to solve the above-described problems, and in the case where a multi-display system is configured by using a plurality of display panels, the joint (boundary portion) of the display panels is made inconspicuous and has a mechanical strength.
- An object of the present invention is to provide a multi-display system improved in the above and a translucent cover used for the same.
- a multi-display system includes a plurality of display panels arranged adjacent to each other via a boundary portion, and a translucent cover provided on the plurality of display panels.
- a translucent cover disposed so as to cover the boundary portion across both of the plurality of display panels disposed, and the translucent cover is at least a part of the display panel other than the boundary portion And a portion having a concave portion formed on the viewer side at a position facing the boundary portion, the portion being continuous with the support portion.
- each of the plurality of display panels includes a display area contributing to display, and a frame area provided around the display area, and the boundary portion includes the adjacent display panel. A part of the light emitted from the display panel is emitted from an area corresponding to the boundary portion of the translucent cover in the concave portion.
- the concave portion covers at least a part of the display area.
- the light-transmitting cover further includes a light diffusion layer or an antireflection layer.
- the recess has a surface defined by two planes that are non-parallel to each other.
- the recess has a surface defined by a curved surface.
- the recess has an asymmetric shape at the boundary.
- the display panel includes a plurality of pixels, and a display signal based on information on an image to be displayed at the boundary portion is given to the pixels adjacent to the boundary portion.
- the observation direction of the observer is defined, and the shape of the recess is defined according to the observation direction.
- an optical sensor is provided at the boundary.
- the translucent cover of the present invention includes a plurality of display panels provided with a display area that contributes to display and a frame area formed around the display area, and the plurality of display panels are interposed via a boundary portion.
- a translucent cover used in a multi-display system arranged adjacent to each other, covering the boundary portion between the display panels across both of the adjacent display panels
- the display panel is disposed on the viewer side and has a recess at a position facing the boundary, and a part of the light emitted from the display panel is in the recess in the translucent cover. The light is emitted from a region corresponding to the boundary portion.
- the display panel means a panel structure having a minimum unit that has a display medium and can control light used for display.
- the joint of each display panel adjacent in the multi-display structure inconspicuous. Further, the mechanical strength can be improved by disposing a light-transmitting optical member so as to cover the boundary portion between adjacent display panels.
- FIG. 1 It is a schematic diagram which shows the structure of the multi-display system concerning Embodiment 1 of this invention. It is sectional drawing which shows the liquid crystal panel used for the multi-display system of Embodiment 1 of this invention. It is a top view which shows the liquid crystal panel used for the multi-display system of Embodiment 1 of this invention. It is sectional drawing which expands and shows the boundary part (joint) vicinity of the liquid crystal panel in the multi-display system concerning Embodiment 1 of this invention. It is a figure which shows the relationship between an observer's visual acuity and a decomposition
- FIG. 1 shows a multi-display system (hereinafter sometimes referred to as a multi-panel) 10 configured using a plurality of liquid crystal panels 100.
- the illustrated multi-display system 10 includes four liquid crystal panels 100 arranged adjacent to each other in a 2 ⁇ 2 arrangement. Note that the multi-display system 10 is not limited to the example illustrated in FIG. 1, and it is needless to say that the liquid crystal panel 100 may be configured using more liquid crystal panels 100 such as a 4 ⁇ 4 arrangement.
- the liquid crystal panels 100 do not necessarily have to be arranged in a grid pattern, and may be arranged so that the panel pitch is shifted by half for each column (or for each row).
- the multi-display system 10 there is a seam 20 at the boundary portion (or connection portion) between two adjacent liquid crystal panels 100.
- a portion that is formed between display regions of adjacent display panels (the liquid crystal panel 100 in the present embodiment) and does not contribute to display including the frame region of each panel is referred to as a joint (or boundary portion) 20.
- the seam 20 is formed in a lattice shape along the outer edge of each liquid crystal panel 100.
- the liquid crystal panel 100 is a transmissive display panel that performs display using light from a backlight (not shown), and a large-screen direct-view display device can be obtained by adopting a multi-display configuration.
- the liquid crystal panel 100 includes a TFT substrate 102, a counter substrate 101, and a liquid crystal layer 105 interposed therebetween.
- the liquid crystal layer 105 is sealed by a seal portion 104 between a pair of opposed substrates 101 and 102. Further, the liquid crystal panel 100 defines a display area (active area) 100A and a frame area 100F provided outside the display area 100A.
- the TFT substrate 102 is provided with TFTs and pixel electrodes (not shown), and the counter substrate 101 is provided with, for example, a color filter layer and a counter electrode (common electrode).
- the color filter layer may be provided on the TFT substrate 102 side, and in the case of a liquid crystal panel driven in a horizontal electric field mode such as an IPS (In-Plane-Switching) mode, the counter electrode may not be provided. good.
- an optical element such as a polarizing plate or a retardation plate may be provided in each of the substrates 101 and 102.
- a light shielding layer (black mask) 106 is provided between the seal portion 104 and the TFT substrate 102 and between the seal portion 104 and the counter substrate 101.
- the light shielding layer 106 has a function of preventing light leakage at the edge of the liquid crystal panel 100 and improving the display quality at the periphery of the display region 100A.
- the display quality is likely to deteriorate due to the disorder of the alignment of the liquid crystal molecules, but undesired modulated light that has passed through the end region of the liquid crystal layer 105 reaches the viewer's eyes by the light shielding layer 106. This can be prevented.
- a boundary between the display region 100A and the frame region 100F of the liquid crystal panel 100 is defined by the edge 106E of the light shielding layer 106 on the liquid crystal layer 105 side.
- the light shielding layer 106 is often provided so as to overlap with the seal portion 104 as described above.
- the configuration is not limited to this, and the light shielding layer 106 may be provided inside the seal portion 104 in the liquid crystal cell.
- the light shielding layer 106 is provided only on either the counter substrate 101 or the TFT substrate 102 (typically only on the counter substrate 101). Also good.
- the light shielding layer 106 is formed using, for example, a metal layer or a black resin layer.
- the display area 100A of the liquid crystal panel 100 a plurality of pixels are arranged in a matrix, for example.
- the display area 100A is shown as a pixel area 107 in FIG.
- the frame region 100F of the liquid crystal panel 100 is provided with a connection terminal 103 for the seal portion 104, a drive circuit, and the like.
- the connection terminal 103 includes the gate terminal 108 and the source terminal 109 shown in FIG.
- the gate terminal 108 and the source terminal 109 are respectively formed in terminal regions (typically, TFT substrate extension portions outside the liquid crystal cell) provided on each side of the liquid crystal panel 100.
- An FPC (flexible circuit board) 110 as an external drive circuit, which will be described later, is connected to the connection terminal 103 via, for example, a driving IC chip mounted with COG (chip on glass).
- a backlight and a light guide plate for allowing light from the backlight to enter the liquid crystal cell are provided on the back side (the side opposite to the observer side) of the liquid crystal panel 100.
- the backlight for example, an LED or a CCFL can be used.
- the liquid crystal panel 100 described above may have a configuration similar to, for example, a 60-inch liquid crystal display device (model number: PN-V601) obtained from the applicant of the present application.
- This liquid crystal display device is compatible with a multi-display system.
- the width of a non-display area (seam 20) existing between active areas of adjacent liquid crystal panels 100 is about It is set to 7.1 mm.
- each liquid crystal panel 100 has an asymmetric configuration on the panel surface
- the liquid crystal panels 100 are arranged in the same direction, and a seam 20 is formed between adjacent liquid crystal panels 100.
- the joint 20 includes a frame region 100 ⁇ / b> F included in each display panel 100, and may further include a panel holding structure such as a bezel for holding the liquid crystal panel 100.
- the boundary portion 20 of the liquid crystal panel 100 does not have pixels, and is a portion where an image is lost in the display image of the entire multi-display system 10. For this reason, a grid-like black frame is visually recognized as an image disturbance with respect to the image of the entire display.
- the boundary portion 20 as a non-display area has a horizontal width ⁇ X and a vertical width ⁇ Y. The larger the widths ⁇ X and ⁇ Y, the more the observer sees discomfort / foreign object feeling with respect to the content of the image depending on the viewing distance of the observer.
- FIG. 4 is an enlarged view showing the vicinity of the boundary (seam) 20 between the liquid crystal panels 100 arranged adjacent to each other.
- the seam 20 is provided with a black mask 112 for making the seam 20 inconspicuous.
- the black mask 112 is formed of a black material, and more specifically, for example, a resist containing a black pigment such as carbon black, low-order titanium oxide (titanium black), iron oxide, chromium, silver fine particles, or the like. And is formed by a photolithographic method.
- a translucent cover 113 is provided so as to cover the joint 20 and straddle the adjacent liquid crystal panel 100.
- the translucent cover 113 includes a flat portion 113P as a support portion and a portion where a concave portion 113C provided integrally therewith is formed, and the concave portion 113C is located at a position corresponding to the joint 20. Is formed.
- the translucent cover 113 configured as described above has a function of reinforcing the joint 20 as a protective member, and also has a function of refracting light emitted from the liquid crystal panel 100 as an optical lens in the recess 113C.
- a connector portion 111 is provided on the back side of the liquid crystal panel 100.
- the FPC 110 that is crimped to the connection terminal 103 of the liquid crystal panel 100 is connected to an expansion board (not shown).
- the FPC 110 and the connection terminal 103 are pressure-bonded while obtaining conduction through an anisotropic conductive film, for example.
- the connector part 111 includes, for example, a connector housing made of an engineering plastic such as PBT (polybutylene terephthalate), modified PPE (polyphenylene ether) or PC (polycarbonate), or a resin material such as PS (polystyrene), and an electrical connection terminal. It is formed and fixed to the housing connection part 115. Further, the housing connection part 115 of the joint 20 is made of a light-transmitting material, and can transmit light from the adjacent backlight light guide part 116.
- the adjacent liquid crystal panels 100 are connected via the black mask 112 and sandwiched between the translucent cover 113 and the connector portion 111. It is fixed in this way. In such a configuration, the mechanical strength of the seam 20 is improved.
- the translucent cover 113 is made of, for example, a material such as light transmissive acrylic, and the thickness thereof is set to, for example, about 1 mm to about 30 mm in the flat portion 113P. This thickness may be appropriately selected according to the mechanical strength required at the joint 20 and is determined in consideration of the size, number, arrangement, etc. of the liquid crystal panels to be connected, for example. However, it is necessary to form a recess 113 ⁇ / b> C in the translucent cover 113 at the boundary 20.
- the depth of the recess 113C in the vertical direction of the panel associated with the inclination angle of the recess 113C is appropriately selected according to the assumed distance between the display device and the observer, but the translucent cover in the flat portion 113P.
- the thickness of 113 is preferably about twice or more the depth of the recess 113C.
- the translucent cover 113 is provided with an inclined surface, and a recess 113C having a surface defined by two non-parallel inclined surfaces is formed.
- the translucent cover 113 having the recess 113C can be manufactured, for example, by mechanically grinding and polishing the surface of a translucent flat plate such as an acrylic resin.
- the recess 113C having an optical lens function may be formed by partially applying pressure to the recess formation portion to provide an inclination when the translucent cover 113 is made of a translucent resin material. .
- the outer surface of the liquid crystal panel 100 is often formed from a glass substrate, an optical film, or the like.
- a material having a refractive index in a range equivalent to the refractive index of glass or plastic as a substrate material is selected as the material of the translucent cover 113, and the refractive index thereof is, for example, 1.30 to 1. 64.
- the refractive index of the glass substrate for liquid crystal panels is 1.51, when an acrylic resin (refractive index: 1.48 to 1.52) is used as the translucent cover 113, the refractive index is set to 1. .51 after adjustment.
- the recess 113C of the translucent cover 113 is provided so as to cover the joint 20, and preferably, the recess 113C is provided so as to cover the end region of the display region 100A. Further, it is desirable that the entire width of the translucent cover 113 is larger than the width ⁇ X of the joint 20 and smaller than the width of the liquid crystal panel 100.
- the translucent cover 113 has a portion where the recess 113C is formed and a flat portion 113P extending from this portion toward the center of the liquid crystal panel 100.
- the flat portion 113P is typically formed integrally with a portion where the recess 113C is formed, and supports this.
- the flat portion 113P is provided, since the surface thereof is flat, the possibility of adversely affecting the display in the display region can be reduced, and the joint 20 can be suitably reinforced.
- the translucent cover 113 may have an arbitrary structure as long as the recess 113 ⁇ / b> C is formed at a position corresponding to the joint 20.
- the shape may have a slope that gently slopes from the end of the recess 113C toward the liquid crystal panel 100 side.
- the translucent cover 113 is disposed so as to selectively cover the joint 20. Thereby, the material of the translucent cover 113 can be saved, and the weight can be reduced.
- a translucent cover 113 that selectively covers the seam 20 may be used, and a substantially flat translucent cover that covers the display area of the liquid crystal panel may be further used.
- a concave portion may be provided in the translucent cover 113 and then attached to the liquid crystal panel 100.
- the optical cover may be attached so as to cover the joint 20 of the liquid crystal panel 100, and then a desired recess 113C may be formed on the joint 20 by a mechanical or chemical method.
- the translucent cover 113 is integrally formed so that the portion where the recess 113C is formed straddles the panel, the seam 20 can be reinforced and the mechanical strength can be improved. Furthermore, since there is no interface that causes a change in the refractive index in the portion of the translucent cover 113 that is interposed between the recess 113C and the liquid crystal panel 100, external light is reflected unnecessarily. The problem that the seam 20 is conspicuous does not occur.
- an optical sheet 114 for low reflection and light scattering is disposed on the viewer side of the translucent cover 113, and a light diffusion layer or an antireflection layer is formed by the optical sheet 114.
- the optical sheet 114 may be omitted as long as it is provided as necessary.
- the surface roughness of the translucent cover 113 may be set appropriately. Also in this case, it is possible to improve the viewing angle characteristics by scattering the light emitted from the liquid crystal panel 100, and to reduce unnecessary reflection of external light.
- the recess 113C by providing the recess 113C, light from the pixels around the display area 100A of the liquid crystal panel 100 is emitted from the area corresponding to the boundary 20 of the translucent cover 113 to the front side of the panel. .
- the size of ⁇ X ′ is reduced to such a size that the viewing angle is equal to or smaller than the eye resolution according to the observation distance of the multi-panel 10.
- the graph (a) shown in FIG. 5 represents the exploded viewing angle with respect to visual acuity
- the resolved viewing angle is about 0.7 minutes.
- FIG. 6 is an enlarged view showing the vicinity of the boundary 20 in the multi-display system of the second embodiment.
- the second embodiment has the same configuration as that of the first embodiment except that the translucent cover 123 is used. That is, the configuration of the liquid crystal panel 100 and the arrangement form of the liquid crystal panel 100 are the same as those in the first embodiment described with reference to FIGS.
- the same referential mark is attached
- the lens shape of the translucent cover 123 is formed to be a smooth concave shape.
- the concave portion 123C of the translucent cover 123 with a shape that is defined by a smooth curved surface, when the multi-panel is viewed from an oblique direction, it is possible to prevent the connection portion (seam) from appearing in a streak shape. can do.
- the recess 113C particularly when performing low-gradation display.
- the intensity of the reflected light from the inclined surface is larger than the intensity of the display light around the recess 113C.
- the slope of the recess 113C is observed in a stripe shape, and the width of the stripe corresponds to the width of the slope constituting the recess 113C.
- FIG. 6 when a translucent cover having a concave portion 123 ⁇ / b> C defined by a smooth curved surface is used, the width of the observed streak becomes small, so that the streak is hardly visually recognized.
- the lens part of the translucent cover a smooth concave shape
- the brightness change of the seam is smooth even when the panel is viewed obliquely, the influence of external light reflection is reduced, and the seam is Disappears.
- FIGS. 7A to 7C are diagrams showing image information and the like to be displayed at a joint of liquid crystal panels (herein, described as panel 1 and panel 2) arranged adjacent to each other in the multi-display system.
- FIG. 7A shows a form of image display by a method of performing display by thinning out image information at a joint.
- the distance ⁇ X of the seam portion corresponds to the width of the non-display area, and assuming that there is an image to be displayed (thinned image) at the position of the seam in FIG. It can be assumed that is displayed.
- pixels exist at positions N + 0 to N + 3 in panel 1 and M + 0 to M + 3 in panel 2, and actual display is performed in this portion.
- the virtual pixels of N + 4 to N + 6 and M + 4 to M + 6 at the joint are not displayed but displayed as black frames, so that the quality of the entire image is deteriorated.
- FIG. 7B shows a case where image display is performed with luminance aY and bY in the n + 2 and n + 3 pixels of the panel 1 and the m + 2 and m + 3 pixels of the panel 2, respectively.
- the luminance Y is a standard luminance, for example, a reference luminance when displaying a uniform solid screen.
- the coefficients a and b are luminance coefficients given to pixels in the vicinity of the joint, and are set based on the shape of the optical lens (concave portion) on the joint. The values of the coefficients a and b are adjusted so that, for example, when the display panel is viewed from the front, the viewer can see the screen with a uniform luminance Y. In these pixels, image information given to pixels (for example, N + 4 and M + 4) that are not displayed in FIG. 7A is distributed, and so-called interpolated images are displayed.
- FIG. 7C shows a case where an observer views the display on the joint through a light-transmitting cover having a concave portion as an optical lens. It appears that the virtual image pixels i + 2 and i + 3 corresponding to the pixels n + 2 and n + 3 in FIG. 7B and the virtual image pixels j + 2 and j + 3 corresponding to the pixels m + 2 and m + 3 are extended with a luminance of Y. For this reason, it seems to the observer that the virtual image pixels are present inside the seam, and the width of the black frame of the seam is ⁇ X ′.
- the image information (display signal) given to the pixels in the vicinity of the joint is image information that can interpolate an image originally displayed on the joint.
- the image information to be given to the pixels near the seam may be information using the result of the above-described calculation or information obtained by simply thinning out the data of the seam part. Since the image around the seam is expanded and displayed by the concave portion as the optical lens, the image has a reduced resolution, but the continuity of the image information between the seams can be maintained. Further, since the seam appears to be narrower in the width of ⁇ X ′, it seems that the seam has melted into the image around the seam.
- an interpolation image of an image to be displayed on the joint portion is displayed on the pixels around the joint portion (peripheral display region) of the display panel, and the optical lens shape (concave portion) is used.
- An expanded image is displayed.
- an optical lens for interpolating an image is not necessary.
- a transparent flat plate that can maintain brightness continuity between the center of the panel and the joint is used. It may be arranged adjacent to
- the joint position of the panels may be higher than the line of sight.
- the concave portion (lens portion) of the translucent cover arranged at the seam at each height is asymmetric with respect to the center of the panel boundary so that the seam is most inconspicuous in the average line-of-sight direction. It may be a shape. That is, in FIG. 8, the shape of the lens portion located at the joint of the panel 100 differs depending on the heights hd1, hd2, and hd3 of the joint. Specifically, in the case of the optical lens shape shown in FIG. 4, the inclination angle of the lens portion extending in the horizontal direction is asymmetric.
- the vertical joint, horizontal development, curved surface development, dome-shaped development, etc. are all so conspicuous as to the average line-of-sight direction (observation direction) from the observer.
- the optical lens shape is selected.
- FIG. 9 shows a case where the inclination angle of the recess 213C of the translucent cover 213 of this embodiment located at the joint is asymmetric between the panel 200 side and the panel 201 side.
- the lens portion exists up to a distance A (immediately above the active area) covering pixels around the joint, and B> C (where B is on the ground side) with respect to the center line of the joint.
- A intermediately above the active area
- B> C where B is on the ground side
- the curved concave portion 123C shown in FIG. 6 can also have an asymmetric shape by changing the curvature. Even when a translucent cover having such a concave portion is used, a concave portion having an asymmetric shape defined according to the observation direction of the observer is appropriately arranged on each seam based on the above-described rules. You can do it.
- the seam can be preferably made inconspicuous.
- FIG. 10 shows a configuration in which an optical sensor 300 is provided at the joint of the multi-display system.
- the optical sensor 300 is, for example, a small CCD imaging unit configured by combining an optical fiber and a spherical lens, and is disposed at a seam corresponding to a ridge (a place where seams extending in the vertical and horizontal directions intersect).
- the position of the observer and the line-of-sight can be measured by the optical sensor 300 arranged at the position of each eyelid. Based on the position information of the observer obtained in this way, it is possible to provide a display of image content and a bidirectional information exchange environment according to the distance to the observer and the direction of the line of sight.
- FIG. 11 shows a configuration of a multi-panel seam in which the optical sensor 300 is arranged.
- the light receiving unit is configured by a microlens, a fiber, or the like, and is connected to the connector unit 111 through the translucent cover 113 and the black mask 112.
- the connector unit 111 is provided with an optical module such as a CCD chip and forms an image of received light.
- the received image signal is transmitted to an external control device via wiring provided in the connector unit 111.
- the periphery of the light guide portion of the optical sensor 300 may be covered with a light shielding film in order to avoid interference with light emitted from the liquid crystal panel 100.
- the optical sensor 300 is not limited to a visible light sensor, and may be one that applies infrared light or ultraviolet light.
- the optical sensor installed at the joint does not hinder the image display and enables bidirectional information exchange with the observer. Therefore, it can be used for the purpose of monitoring the weather and people / traffic in the installation environment.
- the multi-display system according to the embodiments of the present invention has been described above, but the multi-display system according to these embodiments has the following characteristics.
- image information originally displayed in the frame region is distributed to pixels around the frame.
- the frame peripheral image is expanded so that the frame looks optically thin, and interpolation image information is output to the frame peripheral pixels.
- the display panel is not limited to the illustrated liquid crystal panel, but may be an EL panel, an FED (field emission display) panel, an electrophoretic display panel, an LED display panel, or the like.
- a display panel can be used.
- Various display panels that perform other reflective display or self-luminous display can also be used in the multi-display system of the present invention.
- the present invention is suitably used as a multi-display system constituting a large screen.
- the multi-display system according to the embodiment of the present invention is suitably used as a large screen display device such as an information display and a digital signage.
- Multi-display system 20 Seam (boundary) 100 LCD panel 100A Display area (active area) 100F frame region 101 counter substrate 102 TFT substrate 103 connection terminal 104 seal portion 105 liquid crystal layer 106 light shielding layer 108 gate terminal 109 source terminal 111 connector portion 112 black mask 113 translucent cover 113C recess 114 optical sheet 115 housing connection portion 116 back Light guide
Abstract
Description
図1は、複数の液晶パネル100を用いて構成されるマルチディスプレイシステム(以下、マルチパネルと呼ぶ場合がある)10を示す。図示するマルチディスプレイシステム10は、縦横2×2の配列で互いに隣接して配置された4枚の液晶パネル100によって構成されている。なお、図1に示す例に限られず、マルチディスプレイシステム10は、縦横4×4の配列など、より多くの液晶パネル100を用いて構成されていてもよいことは言うまでもない。また、液晶パネル100は、必ずしも格子状に配列されている必要はなく、列ごと(または行ごと)にパネルピッチを半分ずらすように配列されていてもよい。
図6は、実施形態2のマルチディスプレイシステムにおける境界部20の近傍を拡大して示す図である。実施形態2において、透光性カバー123を用いること以外は実施形態1と同様の構成を有する。すなわち、液晶パネル100の構成や、液晶パネル100の配列形態についても図1~3を用いて説明した実施形態1と同様である。なお、実施形態1と同様の構成部材には同様の参照符号を付し、説明を省略する。
図7(a)~(c)は、マルチディスプレイシステムにおいて、隣接して配置された液晶パネル(ここではパネル1、パネル2として説明する)の継ぎ目において表示すべき画像情報などを示す図である。図7(a)は、継ぎ目における画像情報を間引いて表示を行う方法による画像表示の形態を示す。ここで、継ぎ目部分の距離ΔXは非表示領域の幅に相当し、図7(a)において継ぎ目の位置に表示すべき画像(間引いた画像)が存在すると仮定した場合、継ぎ目部分では輝度が0の表示が行われているものと見做すことができる。実際には、画素は、パネル1においてN+0~N+3、パネル2においてM+0~M+3の位置に存在しており、この部分では実際の表示が行われる。一方、継ぎ目での、N+4~N+6、および、M+4~M+6の仮想的な画素では表示が行われず、黒枠として表示されるため、画像全体としての品位の低下が生じる。
複数の大型表示パネルをタイル状に例えば垂直方向に並べる場合などにおいて、パネルの継ぎ目の位置が目線よりも高い位置になる場合がある。このとき、各高さでの継ぎ目に配置された透光性カバーの凹部(レンズ部)は、平均的な視線方向に対して最も継ぎ目が目立たなくなるように、パネル境界の中央に対して非対称の形状であってよい。つまり、図8においては、パネル100の継ぎ目に位置するレンズ部の形状が継ぎ目の高さhd1、hd2およびhd3に応じて異なっている。具体的には、図4に示した光学レンズ形状の場合、水平方向に延びるレンズ部の傾斜角度が非対称となっている。
図10は、マルチディスプレイシステムの継ぎ目において光学センサ300が設けられている構成を示している。光学センサ300は、例えば、光ファイバーと球面レンズとを組み合わせて構成される小型のCCD撮像ユニットであり、パネルの辻(縦横に延びる継ぎ目が交差する場所)に当たる継ぎ目に配置されている。
20 継ぎ目(境界部)
100 液晶パネル
100A 表示領域(アクティブエリア)
100F 額縁領域
101 対向基板
102 TFT基板
103 接続端子
104 シール部
105 液晶層
106 遮光層
108 ゲート端子
109 ソース端子
111 コネクタ部
112 ブラックマスク
113 透光性カバー
113C 凹部
114 光学シート
115 筐体接続部
116 バックライト導光部
Claims (11)
- 境界部を介して互いに隣接して配置された複数の表示パネルと、
前記複数の表示パネル上に設けられた透光性カバーであって、前記隣接して配置された複数の表示パネルの両方に跨って前記境界部を覆うように配置された透光性カバーと
を備えるマルチディスプレイシステムであって、
前記透光性カバーは、前記境界部以外の前記表示パネルの少なくとも一部を覆う支持部と、前記支持部に連続する部分であって前記境界部に対向する位置において観察者側に形成された凹部を有する部分とによって構成されているマルチディスプレイシステム。 - 前記複数の表示パネルのそれぞれは、表示に寄与する表示領域と、前記表示領域の周辺に設けられた額縁領域とを有しており、
前記境界部は、前記隣接する表示パネルのそれぞれの前記額縁領域を含み、
前記表示パネルから出射された光の一部は、前記凹部において、前記透光性カバーの前記境界部に対応する領域から出射される請求項1に記載のマルチディスプレイシステム。 - 前記凹部が前記表示領域の少なくとも一部を覆う請求項2に記載のマルチディスプレイシステム。
- 前記透光性カバー上に形成される光拡散層または反射防止層をさらに有する請求項1から3のいずれかに記載のマルチディスプレイシステム。
- 前記凹部は、互いに対して非平行な2つの平面によって規定される表面を有する請求項1から4のいずれかに記載のマルチディスプレイシステム。
- 前記凹部は、曲面によって規定される表面を有する請求項1から4のいずれかに記載のマルチディスプレイシステム。
- 前記凹部は、前記境界部において非対称な形状を有する請求項1から6のいずれかに記載のマルチディスプレイシステム。
- 前記表示パネルは複数の画素を有し、前記境界部に近接する画素には、前記境界部において表示すべき画像の情報に基づく表示信号が付与される請求項1から7のいずれかに記載のマルチディスプレイシステム。
- 観察者の観察方向が規定されており、前記観察方向に応じて前記凹部の形状が規定される請求項1から8のいずれかに記載のマルチディスプレイシステム。
- 前記境界部に光学センサが設けられている請求項1から9のいずれかに記載のマルチディスプレイシステム。
- 表示に寄与する表示領域と、前記表示領域の周辺に形成された額縁領域とが設けられた複数の表示パネルを備え、前記複数の表示パネルが境界部を介して互いに隣接して配置されているマルチディスプレイシステムに用いられる透光性カバーであって、
前記隣接して配置された表示パネルの両方に跨って前記表示パネル間の前記境界部を覆うように前記表示パネルの観察者側に配置され、かつ、前記境界部に対向する位置に凹部を有しており、
前記表示パネルから出射された光の一部は、前記凹部において、前記透光性カバーの前記境界部に対応する領域から出射される、透光性カバー。
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CN201280006210.0A CN103339666B (zh) | 2011-01-27 | 2012-01-26 | 多显示系统及其所用的透光性罩 |
JP2012554844A JP5662482B2 (ja) | 2011-01-27 | 2012-01-26 | マルチディスプレイシステムおよびこれに用いられる透光性カバー |
SG2013057245A SG192177A1 (en) | 2011-01-27 | 2012-01-26 | Multi-display system and translucent cover used thereby |
EP12739671.1A EP2660801A4 (en) | 2011-01-27 | 2012-01-26 | MULTI-DISPLAY SYSTEM AND TRANSLUCENT COVER USED THUS |
US13/981,394 US9243779B2 (en) | 2011-01-27 | 2012-01-26 | Multi-display system and translucent cover used thereby |
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CN103339666B (zh) | 2016-06-15 |
EP2660801A1 (en) | 2013-11-06 |
JPWO2012102349A1 (ja) | 2014-06-30 |
CN103339666A (zh) | 2013-10-02 |
SG192177A1 (en) | 2013-09-30 |
US9243779B2 (en) | 2016-01-26 |
EP2660801A4 (en) | 2015-06-24 |
US20130301263A1 (en) | 2013-11-14 |
JP5662482B2 (ja) | 2015-01-28 |
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