WO2015132943A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2015132943A1 WO2015132943A1 PCT/JP2014/055891 JP2014055891W WO2015132943A1 WO 2015132943 A1 WO2015132943 A1 WO 2015132943A1 JP 2014055891 W JP2014055891 W JP 2014055891W WO 2015132943 A1 WO2015132943 A1 WO 2015132943A1
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- WO
- WIPO (PCT)
- Prior art keywords
- liquid crystal
- crystal panel
- display device
- transparent plate
- optical sheet
- Prior art date
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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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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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
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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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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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
- G02B6/0065—Manufacturing aspects; Material aspects
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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
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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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
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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
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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
- G02F1/1341—Filling or closing of cells
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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
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
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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
- G02F1/133302—Rigid substrates, e.g. inorganic substrates
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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
- G02F1/133314—Back frames
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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
- G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
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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
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Definitions
- the present invention relates to a display device using a liquid crystal panel, and more particularly to a display device having a structure capable of realizing further thinning and narrowing of the frame.
- a display device using a liquid crystal panel includes a light source, and an optical sheet for diffusing or condensing light from the light source between the light source and the liquid crystal panel.
- the light sources in recent display devices are arranged with a plurality of light emitting diodes facing the end surface of a transparent plate called a light guide plate, and the light incident from the end surface is uniformly distributed from a wide surface.
- An edge light system for emitting light is often used.
- the light guide plate may be made of the same glass as the material of the liquid crystal panel (Patent Document 1, etc.), but in many cases, PMMA (Poly (methyl methacrylate)), MS, etc. is relatively more than glass. A resin product having low rigidity is used.
- the optical sheet is a flexible film such as PET (Polyethylene terephthalate). Therefore, in order to position the light guide plate and the optical sheet together with the liquid crystal panel, a holding member made of a resin harder than each material or a holding member made of metal is required.
- the light guide plate and the optical sheet have a relatively high coefficient of thermal expansion, and in particular, the optical sheet is a film, so that wrinkles or deflection is likely to occur.
- the wrinkling or bending of the optical sheet causes problems such as uneven brightness and decreased brightness of the display device.
- the light guide plate and the holding member for the optical sheet require a holding structure for positioning and holding the optical sheet with a space for expansion in view of thermal expansion.
- FIG. 8 is a cross-sectional view showing a main part of a conventional display device 90.
- the display device 90 includes a liquid crystal panel 91, a light source device 92, an optical sheet 93, and holding members 94 and 95.
- the liquid crystal panel 91 is a display panel and has a rectangular flat plate shape.
- the liquid crystal panel 91 is configured by injecting a liquid crystal 913 between two glass substrates 911 and 912 that are arranged to face each other with a predetermined gap and sealed with a sealing material 914 and a sealing material 915.
- Each element including an electrode for driving the liquid crystal 913 is formed on the glass substrates 911 and 912 (not shown).
- the liquid crystal panel 91 includes a driving circuit (driver) 916 to which each element is connected and a substrate 917 for supplying a signal to the driving circuit 916 at the end of one glass substrate 912 on one long side.
- the light source device 92 is an edge light type light source using a light emitting diode 921.
- the light source device 92 has a plurality of light emitting diodes 921 opposed to an end surface on the long side of a light guide plate 922 made of a highly transparent resin such as acrylic and having a rectangular flat plate shape on a long substrate 923 along the end surface. Arranged.
- the substrate 923 is connected to a heat radiating plate 924 that radiates heat generated by the plurality of light emitting diodes 921.
- the cross-sectional shape of the heat radiating plate 924 is an L shape in which the vertical line extends along the wide surface of the light guide plate 922 and the horizontal line extends along the end surface of the light guide plate 922 on the long side.
- scattering dots that travel in the light guide plate 922 and diffusely reflect and refract the light that reaches the wide surface side and guide it to the other wide surface side. 925 is formed by printing or laser processing.
- the holding member 94 is made of, for example, metal, and has a shape in which a side plate on one long side of a rectangular box whose one surface is opened is further opened.
- the bottom surface of the holding member 94 is slightly larger than the size of the wide surface of the light guide plate 922, and the height of the side plate is slightly higher than the thickness of the light guide plate 922.
- the reflection surface of the reflection sheet 926 is adhered to a wide surface on which the dot pattern 925 of the light guide plate 922 is formed.
- the light guide plate 922 is installed on the holding member 94 so that the reflection sheet 926 side faces the bottom surface of the holding member 94.
- the light emitting diode 921, the substrate 923, and the radiation plate 924 are installed on one long side where the side plate of the holding member 94 is open. At this time, the radiation plate 924 is installed such that the reflection sheet 926 and the bottom plate of the holding member 94 are sandwiched between a portion along the wide surface of the light guide plate 922 and the light guide plate 922.
- a light source device 92 is configured. In the light source device 92, light from the light emitting diode 921 enters the light guide plate 922 from the side surface of the light guide plate 922, and is partially reflected on each surface or by the reflection sheet 926.
- the light travels inside by total reflection and is emitted from the wide surface on the opposite side of the reflection sheet 926 by scattering at the scattering dots 925. Accordingly, uniform planar light is emitted from the wide surface of the light guide plate 922 to the liquid crystal panel 91 side.
- the optical sheet 93 has a rectangular shape, and is, for example, a group of three optical sheets including a lens sheet 931, a prism sheet 932, and a diffusion sheet 933.
- the liquid crystal panel 91 and the optical sheet 93 are positioned with respect to the light source device 92 by a holding member 95 fitted to the holding member 94.
- the holding member 95 is, for example, a resin frame.
- a circumferential groove is provided on one outer surface of the holding member 95, and a side plate of the holding member 94 is fitted in the groove.
- a receiving portion for positioning the optical sheet 93 is provided on the inner peripheral edge of the other surface of the holding member 95. The depth of the receiving portion is slightly deeper than the thickness of the optical sheet 93.
- the outer peripheral edge portion corresponding to the opposite side of the groove on the other surface of the holding member 95 constitutes a convex portion provided around the receiving portion of the optical sheet 93.
- the inner peripheral edge of one surface of the holding member 95 presses the peripheral edge of the light guide plate 922 via the spacer 951.
- the optical sheet 93 is installed on the other surface of the holding member 95 so that the peripheral edge of the optical sheet 93 abuts on the receiving portion.
- the liquid crystal panel 91 is installed on the holding member 95 via the spacer 952 so that the outer peripheral edge portion of the glass substrate 912 of the liquid crystal panel 91 corresponds to the convex portion on the other surface of the holding member 95.
- the liquid crystal panel 91 is installed such that the drive circuit 916 and the substrate 917 side correspond to the light emitting diode 921 side of the light source device 92. Accordingly, the liquid crystal panel 91 and the optical sheet 93 are positioned with respect to the light source device 92, and the display device 90 is configured.
- Patent Document 2 discloses a configuration for realizing thinning of a device having a small display panel such as a mobile phone.
- JP 2003-131221 A Japanese Patent No. 4575486
- a transparent protective plate and a light guide plate provided on the display surface side of the liquid crystal panel are configured to be larger than the liquid crystal panel, and an excessive portion with respect to the liquid crystal panel is bonded and fixed with an adhesive. Yes.
- the display device disclosed in Patent Document 2 does not require a holding member and can be thinned.
- the protective plate and the light guide plate are configured to be larger than the liquid crystal panel, the narrowing of the frame is insufficient.
- the protective plate is made of tempered glass and the light guide plate is made of acrylic resin such as PMMA, the glass and the acrylic resin have different expansion coefficients. There is no problem with a small display device, but since the displacement becomes large with a large display device, the light guide plate may be bent when the protective plate and the light guide plate are separated or when the adhesive strength is high. There is concern about the possibility of damage.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a display device having a structure capable of realizing thinning and narrowing of the frame without using a holding member.
- a display device includes a liquid crystal panel in which a pair of glass substrates are opposed to each other and liquid crystal is sealed between the glass substrates, a transparent plate disposed to face the liquid crystal panel, and between the liquid crystal panel and the transparent plate And the optical sheet having a smaller surface than the liquid crystal panel, the transparent plate is a glass plate having a wide surface substantially the same shape as the wide surface of the glass substrate, the outer periphery of the optical sheet A frame body is provided between the liquid crystal panel and the transparent plate, and the frame body is thicker than a thickness of the optical sheet.
- the display device according to the present invention is characterized in that the glass substrate has a substantially rectangular shape.
- the display device is characterized in that the frame body is made of an adhesive material that bonds the liquid crystal panel and the transparent plate.
- the display device is characterized in that the frame body has a shape along the entire outer periphery of the glass substrate and the transparent plate.
- the display device is characterized in that an outer periphery of the frame body is substantially equal to an outer periphery of the glass substrate or the transparent plate.
- the display device further includes a blue light-emitting diode arranged to face a part of the peripheral surface of the transparent plate or a surface of the transparent plate opposite to the liquid crystal panel, and the optical sheet Is composed of a plurality of optical sheet groups including a sheet to which a phosphor emitting fluorescence having a longer wavelength than blue is added on the transparent plate side.
- the display device further includes a blue light emitting diode disposed so as to face a part of a peripheral surface of the transparent plate or a surface of the transparent plate opposite to the liquid crystal panel.
- a fluorescent material that emits fluorescence having a wavelength longer than that of blue is coated on a wide surface of the liquid crystal panel.
- the display device is characterized in that a space inside the frame body is filled with a light-transmitting material in a gel or liquid state having a lower refractive index than that of the optical sheet.
- the display device is characterized in that the liquid crystal panel and the transparent plate are curved plates.
- the transparent plate used as the light guide plate is made of glass and has a wide surface of the same material and substantially the same shape as the glass substrate of the liquid crystal panel.
- the properties such as thermal expansion, thermal contraction, or rigidity are the same, the light guide plate and the glass substrate can be handled integrally, and the liquid crystal panel and the light guide plate can be positioned without using separate holding members.
- the structure which performs is possible.
- glass has higher rigidity than resins such as PMMA and MS, the flatness of the light guide plate can be maintained, and a holding member for the light guide plate is unnecessary.
- a configuration in which the optical sheet is enclosed in a frame provided between the liquid crystal panel and the light guide plate eliminates the need for a holding member that is larger in the surface direction than the liquid crystal panel or the light guide plate.
- the optical sheet can be thermally expanded within the frame, and the occurrence of wrinkling or bending of the optical sheet can be prevented.
- a liquid crystal panel composed of a substantially rectangular glass substrate is used, and accordingly, a transparent plate, an optical sheet, and a frame used as a light guide plate are also substantially rectangular.
- the shape is not limited to a rectangular shape, and may be another polygonal shape, an ellipse, an ellipse, or the like.
- the frame provided between the liquid crystal panel and the transparent plate is made of an adhesive material that bonds the liquid crystal panel and the transparent plate. Since the liquid crystal panel and the transparent plate are made of glass of the same material, they can be integrally formed by bonding. Since the frame can be used both as the adhesive material and the optical sheet container, a conventional holding member is not required.
- the outer periphery of the frame provided between the liquid crystal panel and the transparent plate has a shape that extends along the entire outer periphery of the substantially identical wide surface of the glass substrate and the transparent plate.
- the outer periphery of the frame provided between the liquid crystal panel and the transparent plate is substantially equal to the outer periphery of the substantially identical wide surface of the glass substrate and the light guide plate.
- a blue light-emitting diode not coated with a phosphor is used as a light source disposed to face a part of the peripheral surface of the light guide plate according to the use of a glass transparent plate as the light guide plate.
- a sheet to which a phosphor that emits fluorescence on the long wavelength side is added is included in the optical sheet group, or the phosphor is applied to the light guide plate.
- the transmittance of light in the visible light region is not constant over the entire wavelength, and the transmittance of light in the long wavelength region is particularly low.
- the inside of the frame body provided between the liquid crystal panel and the transparent plate and containing the optical sheet is filled with a gel-like or liquid translucent material having a lower refractive index than that of the optical sheet.
- the transparent plate used as the light guide plate is made of glass that has relatively high rigidity and is not easily affected by thermal expansion. As a result, it is possible to position other main parts with reference to the transparent plate in the display device, and it is possible to easily realize a curved display in which the transparent plate is a curved plate similar to the liquid crystal panel.
- the holding member for the light guide plate and the optical sheet which has been used in the conventional display device, is not necessary, and a reduction in thickness can be realized.
- a holding member having an outer shape larger than that of the liquid crystal panel is not necessary, and a narrow frame can be realized.
- FIG. 3 is an exploded perspective view schematically showing a main part of the display device in the first embodiment.
- FIG. 3 is a cross-sectional view schematically showing a main part of the display device in the first embodiment.
- FIG. 6 is a comparative diagram comparing the display device according to the present invention in Embodiment 1 and a conventional display device.
- FIG. 6 is a comparative diagram comparing the display device according to the present invention in Embodiment 1 and a conventional display device.
- FIG. 10 is a cross-sectional view schematically showing main parts of a display device in a second embodiment.
- FIG. 10 is a cross-sectional view schematically showing main parts of a display device in a third embodiment.
- 10 is a perspective view schematically showing a liquid crystal panel and a light guide plate in a display device according to Embodiment 4.
- FIG. It is sectional drawing which shows the principal part of the conventional display apparatus.
- FIG. 1 is an exploded perspective view schematically showing the main part of the display device 100 according to Embodiment 1
- FIG. 2 is a cross-sectional view schematically showing the main part of the display device 100.
- the display device 100 includes a liquid crystal panel 1 and a light source device 4.
- the liquid crystal panel 1 is a display panel and has a rectangular flat plate shape.
- the liquid crystal panel 1 employs an active matrix method.
- the liquid crystal panel 1 is configured by injecting a liquid crystal 13 between two glass substrates 11 and 12 arranged to face each other at a predetermined interval and sealed with a sealing material 14 and a sealing material 15.
- Each element including an electrode for driving the liquid crystal 13 is formed in the pixel region at the center of the glass substrates 11 and 12 (not shown).
- the liquid crystal panel 1 is connected to an end portion on one long side of one glass substrate 12 and is connected to a drive circuit (driver) 16 that supplies a drive signal to each element, and the drive circuit 16.
- a substrate 17 for supplying signals is provided.
- the light source device 4 is an edge light type light source using a light emitting diode 41.
- the light source device 4 has a plurality of light emitting elements arranged on a long side end surface of a light guide plate 42 of a rectangular flat glass having a wide surface substantially the same shape as the glass substrate 11 of the liquid crystal panel 1 and on a long thin substrate 43 along the end surface.
- the diode 41 is arranged to face each other.
- the light emitting diode 41 is a light source that emits white light by applying a phosphor to the surface of a diode that emits blue or ultraviolet light.
- the substrate 43 on which the light emitting diodes 41 are arranged is connected to a heat radiating plate 44 that radiates heat generated by the plurality of light emitting diodes 41.
- the cross-sectional shape of the heat radiating plate 44 is an L shape in which a vertical line extends along the wide surface of the light guide plate 42 and a horizontal line extends along the end surface of the light guide plate 42 on the one long side.
- scattering dots 45 are formed on the wide surface of the light guide plate 42 by printing or laser processing.
- a reflective sheet 46 is adhered to the one wide surface side of the light guide plate 42.
- light from the light emitting diode 41 enters the inside from the end surface on the long side of the light guide plate 42 and is internally reflected by partial reflection on each surface or total reflection by the reflection sheet 46.
- the light travels and is emitted from the wide surface on the opposite side of the reflection sheet 46 by scattering at the scattering dots 45.
- uniform planar light is emitted from the wide surface of the light guide plate 42 to the liquid crystal panel 1 side.
- the liquid crystal panel 1 and the light source device 4 together with the optical sheet 2 and the frame body 3 are assembled as follows with reference to the light guide plate 42 to constitute the display device 100.
- the frame 3 is installed on the other wide surface of the light guide plate 42 where the scattering dots 45 are not formed.
- the frame 3 is made of a resin such as PET, PC (polycarbonate, preferably glass-filled polycarbonate (PC + GF)), ABS, or the like.
- the material of the frame 3 is preferably a material having a thermal expansion coefficient equivalent to or close to that of glass.
- the other wide surface of the light guide plate 42 and the outer shape of the frame 3 are substantially equal, or the outer shape of the frame 3 is slightly smaller.
- Adhesives such as a double-sided tape for bonding to glass, an OCA (Optically-Clear-Adhesive) tape, and a UV curable resin are adhered to both surfaces of the frame 3.
- the frame body 3 is installed such that one annular surface is in contact with the peripheral edge portion of the other wide surface of the light guide plate 42 and is bonded by the adhesive.
- the frame 3 itself may be an adhesive material.
- the optical sheet 2 is accommodated inside the frame 3 so that the diffusion sheet 23 is on the light guide plate 42 side (arrow in FIG. 1).
- the optical sheet 2 has a rectangular film shape using PET as a base material, and is a group of three optical sheets including, for example, a lens sheet 21, a prism sheet 22, and a diffusion sheet 23.
- the inner periphery of the frame 3 is slightly larger than the optical sheet 2 to be accommodated, and the thickness of the frame 3 is slightly thicker than the thickness of the optical sheet 2.
- the frame 3 has a predetermined interval in consideration of the thermal expansion coefficient of the optical sheet 2 in the surface direction and the thickness direction when the optical sheet 2 is accommodated.
- the liquid crystal panel 1 is installed.
- the liquid crystal panel 1 is installed on the frame body 3 so that the peripheral edge of the wide surface on the glass substrate 12 side is in contact with the frame body 3.
- the glass substrate 12 and the frame 3 may also be bonded by an adhesive, or the frame 3 itself may be an adhesive material. Thereby, the optical sheet 2 is enclosed in the frame 3, and the liquid crystal panel 1 and the light guide plate 42 are integrally configured.
- the outer periphery of the frame 3 extend along the entire outer periphery of the glass substrate 11 of the liquid crystal panel 1, the inside of the frame 3 can be made wider, that is, the display surface can be made wider. Is possible. Further, by making the outer periphery of the frame 3 substantially coincide with the glass substrate and the light guide plate, the outer periphery of the liquid crystal panel 1, the frame 3 and the light guide plate 42 becomes a continuous peripheral surface, and positioning is facilitated.
- a reflection sheet 46 is installed on the wide surface of the light guide plate 42 on the side where the scattering dots 45 are formed. The reflection sheet 46 may be adhered or adhered to the light guide plate 42. Further, a light emitting diode 41, a substrate 43, and a heat radiating plate 44 are installed on the end surface on the long side of the light guide plate 42.
- the light guide plate 42 is made of glass and has higher rigidity than a transparent plate made of resin such as PMMA or MS, and can be used as a reference for assembling the main parts as described above. Therefore, a holding member (so-called backlight chassis) that holds the light guide plate 42 is not required.
- the optical sheet 2 is enclosed in the frame 3 between the light guide plate 42 and the glass substrate 12.
- the light guide plate 42 and the glass substrate 12 are made of the same glass, and are similarly affected by thermal expansion or contraction.
- FIG. 3 and 4 are comparative views comparing the display device 100 according to the present invention in Embodiment 1 with a conventional display device 90.
- FIG. 3 the display device 100 according to the first embodiment is shown at the top, and the conventional display device 90 is shown at the bottom.
- FIG. 4 the display device 100 in the first embodiment is shown on the left and the conventional display device 90 is shown on the right.
- the cross section of the end portion on the one long side opposite to the light emitting diode 41 or 921 side is shown.
- the display device 100 according to the first embodiment can be made smaller by the dimension indicated by X in FIG. 3 than the conventional display device 90, and is smaller than the conventional display device 90. It is possible to realize a narrow frame.
- the dimension X is the thickness of the side plate of the holding member 94 that holds the light guide 922 in the conventional display device 90 and the rectangular flat plate of the holding member 95 that fits the side plate and holds the liquid crystal panel 91 and the optical sheet 93. This corresponds to the width of the peripheral edge and the thickness of the peripheral plate.
- the display device 100 in the first embodiment can be made thinner by the dimension indicated by Y in FIG. 4 than the conventional display device 90, and is smaller than the conventional display device 90. Thinning can be realized.
- the dimension Y is equal to the thickness of the bottom plate of the holding member 94 that holds the light guide 922 in the conventional display device 90 and the thickness of the rectangular flat plate of the holding member 95 that holds the liquid crystal panel 91 and the optical sheet 93. Equivalent to.
- the liquid crystal panel 1 is directly bonded to the frame 3 and the light guide plate 42 is directly bonded to the frame 3. That is, unlike the conventional display device 90, the liquid crystal panel 91 is installed on the holding member 95 via the spacer 952, and the holding member 95 is installed on the light guide plate 92 via the spacer 951. Therefore, the mutual distance among the liquid crystal panel 1, the optical sheet 2, and the light guide plate 42 is shorter in the thickness direction than the conventional display device 90.
- FIG. 5 is a cross-sectional view schematically showing a main part of display device 100 according to the second embodiment.
- the configuration of the display device 100 in the second embodiment is the same as the configuration of the display device 100 in the first embodiment except for a part described below. Therefore, the same code
- the optical sheet 2 in Embodiment 2 has a plurality of types of fluorescent substances that emit fluorescence having a wavelength longer than blue on the diffusion sheet 23 side, that is, wavelengths ranging from green to red.
- a phosphor-added sheet 24 to which a phosphor is added is included.
- a blue light emitting diode 47 whose surface is not coated with a phosphor is used instead of the light emitting diode 41.
- the glass that is the material of the light guide plate 42 has a property that the transmittance for light in the visible light region is not constant over all wavelengths. In particular, the transmittance of light on the long wavelength side is lower than that on the short wavelength side.
- blue light since blue light is incident from the end face on the long side of the light guide plate 42, blue light having a uniform luminance is emitted from a wide surface regardless of the distance from the end face.
- the blue light emitted from the light guide plate 42 is incident on one surface of the phosphor-added sheet 24, and a part of the blue light is emitted as it is, but the other excites the added phosphor.
- the liquid crystal panel 1 can be irradiated with high-luminance and uniform white planar light.
- FIG. 6 is a cross-sectional view schematically showing a main part of display device 100 in the third embodiment.
- the configuration of display device 100 in the third embodiment is the same as the configuration of display device 100 in the first embodiment, except for a part described below. Therefore, the same code
- a gel-like or liquid translucent material 31 having a lower refractive index than the material of the optical sheet 2 is filled inside the frame 3 in which the optical sheet 2 is enclosed.
- the frame 3 is set on the light guide plate 42 at the time of assembly and the optical sheet 2 is accommodated, and then the light transmitting material 31 is filled inside the frame 3 so as to cover the frame 3. A liquid crystal panel 1 is installed.
- the optical sheet 2 Since many of the optical sheet groups constituting the optical sheet 2 are made of PET as a base material, not only expansion or contraction due to temperature change but also bending due to absorption of moisture in the air can cause display unevenness.
- the optical sheet 2 is filled with the translucent material 31 and does not come into contact with moisture in the air of the optical sheet 2, so that the occurrence of bending can be suppressed. Since the light transmissive material 31 has a lower refractive index than the optical sheet 2, the light emitted from the light guide plate 42 can be allowed to travel into the optical sheet 2, and light loss in the frame 3 is reduced. can do.
- FIG. 7 is a perspective view schematically showing the liquid crystal panel 1 and the light guide plate 42 in the display device 100 according to the fourth embodiment.
- the display device 100 according to the fourth embodiment is a curved display.
- the glass substrates 11 and 12 and the light guide plate 42 constituting the liquid crystal panel 1 are formed in a curved plate shape in advance as shown in FIG.
- a curved display is constructed by assembling the main parts.
- the frame 3 is also along the curved glass substrate 12 and the light guide plate 42.
- the curved light guide plate 42 does not require a special holding member, and it is easier to manufacture a curved display than when a resin light guide plate is used. is there.
Abstract
Description
図8は、従来の表示装置90の要部を示す断面図である。表示装置90は、液晶パネル91、光源装置92、及び光学シート93、並びにこれらの保持部材94,95を備える。
図1は、実施の形態1における表示装置100の要部を模式的に示す分解斜視図であり、図2は、表示装置100の要部を模式的に示す断面図である。表示装置100は、液晶パネル1及び光源装置4を備える。
図5は、実施の形態2における表示装置100の要部を模式的に示す断面図である。実施の形態2における表示装置100の構成は以下に説明する一部を除き、実施の形態1の表示装置100の構成と同様である。したがって、共通する構成には同一の符号を付し、詳細な説明を省略する。
図6は、実施の形態3における表示装置100の要部を模式的に示す断面図である。実施の形態3における表示装置100の構成は以下に説明する一部を除き、実施の形態1の表示装置100の構成と同様である。したがって、共通する構成には同一の符号を付し、詳細な説明を省略する。
図7は、実施の形態4の表示装置100における液晶パネル1及び導光板42を模式的に示す斜視図である。実施の形態4の表示装置100は、曲面ディスプレイである。実施の形態4では、液晶パネル1を構成するガラス基板11,12と、導光板42とを、図7に示すように、予め曲板状に形成しておく。そして実施の形態1同様に、各要部を組み立てることで曲面ディスプレイが構成される。このとき、枠体3も曲板状のガラス基板12及び導光板42に沿うようにする。
1 液晶パネル
11,12 ガラス基板
13 液晶
2 光学シート
24 蛍光体添加シート
3 枠体
42 導光板(透明板)
47 青色発光ダイオード
Claims (9)
- 一対のガラス基板を対向させて該ガラス基板間に液晶を封入してある液晶パネルと、該液晶パネルに対向配置される透明板と、前記液晶パネル及び透明板間に設けられ、前記液晶パネルよりも小さい面を有する光学シートとを備える表示装置において、
前記透明板は、前記ガラス基板の広面と略同形の広面を有するガラス板であり、
前記光学シートの外周を所定間隔を有して囲繞する枠体を前記液晶パネル及び透明板の間に備え、
前記枠体は、前記光学シートのシート厚よりも厚い
ことを特徴とする表示装置。 - 前記ガラス基板は略矩形状である
ことを特徴とする請求項1に記載の表示装置。 - 前記枠体は、前記液晶パネル及び透明板を接着する接着材料からなる
ことを特徴とする請求項1に記載の表示装置。 - 前記枠体は、前記ガラス基板及び透明板の外周縁の全周に亘って沿う形状を有する
ことを特徴とする請求項1から3のいずれか1つに記載の表示装置。 - 前記枠体の外周は、前記ガラス基板又は透明板の外周と略等しい
ことを特徴とする請求項1から3のいずれか1つに記載の表示装置。 - 前記透明板の周面の一部、又は前記透明板の前記液晶パネルと反対側の面に対向するように配置されてある青色発光ダイオードを更に備え、
前記光学シートは、青色よりも長波長側の蛍光を発する蛍光体が添加されたシートを前記透明板側に含む複数の光学シート群からなる
ことを特徴とする請求項1から5のいずれか1つに記載の表示装置。 - 前記透明板の周面の一部、又は前記透明板の前記液晶パネルと反対側の面に対向するように配置されてある青色発光ダイオードを更に備え、
前記透明板の液晶パネル側の広面に、青色よりも長波長側の蛍光を発する蛍光体が塗布されてある
ことを特徴とする請求項1から5のいずれか1つに記載の表示装置。 - 前記枠体の内側の空間には、前記光学シートよりも低屈折率のゲル状又は液状の透光材料が充填されてある
ことを特徴とする請求項1から7のいずれか1つに記載の表示装置。 - 前記液晶パネル及び透明板は曲板である
ことを特徴とする請求項1から8のいずれか1つに記載の表示装置。
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CN201480002317.7A CN105393166B (zh) | 2014-03-07 | 2014-03-07 | 显示装置 |
PCT/JP2014/055891 WO2015132943A1 (ja) | 2014-03-07 | 2014-03-07 | 表示装置 |
JP2015509662A JP6043868B2 (ja) | 2014-03-07 | 2014-03-07 | 表示装置 |
US14/425,226 US9897747B2 (en) | 2014-03-07 | 2014-03-07 | Display apparatus |
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PCT/JP2014/055891 WO2015132943A1 (ja) | 2014-03-07 | 2014-03-07 | 表示装置 |
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US (1) | US9897747B2 (ja) |
JP (1) | JP6043868B2 (ja) |
CN (1) | CN105393166B (ja) |
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Cited By (2)
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JP2017083595A (ja) * | 2015-10-27 | 2017-05-18 | 三菱電機株式会社 | 湾曲型液晶表示装置、および液晶パネルの製造方法 |
JP2018081195A (ja) * | 2016-11-16 | 2018-05-24 | Nsマテリアルズ株式会社 | 液晶表示装置 |
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US10042110B2 (en) * | 2014-07-21 | 2018-08-07 | Samsung Display Co., Ltd. | Liquid crystal display and manufacturing method thereof |
CN104484016A (zh) * | 2014-12-19 | 2015-04-01 | 广东欧珀移动通信有限公司 | 电子设备 |
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CN107816640A (zh) * | 2016-09-13 | 2018-03-20 | 赛尔富电子有限公司 | 一种超薄面光源led表贴灯 |
KR102380884B1 (ko) * | 2017-09-11 | 2022-03-31 | 삼성전자주식회사 | 디스플레이 모듈 및 이를 갖는 디스플레이 장치 |
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CN112859448B (zh) * | 2021-03-17 | 2023-03-14 | 重庆京东方显示照明有限公司 | 胶带、背光模组、显示装置和背光模组的制备方法 |
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CN105393166A (zh) | 2016-03-09 |
US9897747B2 (en) | 2018-02-20 |
CN105393166B (zh) | 2019-01-15 |
US20160259122A1 (en) | 2016-09-08 |
JP6043868B2 (ja) | 2016-12-14 |
JPWO2015132943A1 (ja) | 2017-03-30 |
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