WO2010044291A1 - 表示装置及びその製造方法 - Google Patents
表示装置及びその製造方法 Download PDFInfo
- Publication number
- WO2010044291A1 WO2010044291A1 PCT/JP2009/062439 JP2009062439W WO2010044291A1 WO 2010044291 A1 WO2010044291 A1 WO 2010044291A1 JP 2009062439 W JP2009062439 W JP 2009062439W WO 2010044291 A1 WO2010044291 A1 WO 2010044291A1
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- substrate
- display device
- display panel
- resin
- driver
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Images
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/842—Containers
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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
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
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- H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants
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- G—PHYSICS
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- 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
- G02F1/13332—Front 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
- G02F1/133331—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
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- G02F2202/00—Materials and properties
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Definitions
- the present invention relates to a display device and a manufacturing method thereof. More specifically, the present invention relates to a display device suitable for a display device for a mobile terminal such as a mobile phone, a PDA (Personal Digital Assistant), a PDA phone, a mobile game machine, and a tablet PC (Personal Computer).
- a mobile terminal such as a mobile phone, a PDA (Personal Digital Assistant), a PDA phone, a mobile game machine, and a tablet PC (Personal Computer).
- FPD flat panel displays
- PDP plasma display panels
- FED field emission displays
- liquid crystal display device can be easily reduced in thickness and power consumption, and can be applied to a wide range of screen sizes from small to large. Therefore, liquid crystal display devices are used in a wide range of applications such as televisions, personal computer displays, and portable terminal displays.
- a liquid crystal display device performs display by electrically controlling the alignment direction of liquid crystal sandwiched between a pair of substrates and adjusting the amount of light supplied from a light source such as a backlight.
- a display device (hereinafter, referred to as a cover substrate disposed on the display surface side of the display panel). "Conventional first display device”) has been developed.
- a conventional second display device is an electro-optical device in which an electro-optical material is sandwiched between a first substrate and a second substrate, and at least one of the first substrate and the second substrate.
- a third substrate is bonded to the first substrate and the second substrate, and a bonding surface of at least one of the first substrate and the second substrate is bonded to the region facing the third substrate.
- An electro-optical device is disclosed in which a groove is formed in at least one of a region of the mating surfaces facing the at least one substrate (see, for example, Patent Document 1).
- a display device including a display panel and a lighting device that illuminates the display panel
- the display panel and the lighting panel cover the entire surface facing the display surface.
- a display device characterized in that it is bonded to the entire surface with a transparent resin is disclosed (for example, see Patent Document 2).
- the cover substrate is affixed to the display panel only by the peripheral portion with a double-sided tape, or is held by the housing of the display device. There is an air layer between them. Therefore, interface reflection occurs at the interface between the cover substrate and the air layer, or between the display panel and the air layer, the transmittance of the display panel is reduced, and external light is reflected at the interface of the air layer. Display contrast may be lowered.
- the cover substrate is fixed with a double-sided tape or a casing in a portion other than the display area of the display device, there is room for improvement in that the adhesive strength with the display device is weak and vibration resistance and impact resistance are poor. was there.
- the conventional second display device a resin having a refractive index equivalent to the refractive index of a member constituting the cover substrate or the display panel can be used as the adhesive.
- the display panel It is possible to increase the transmittance of the light and to suppress a decrease in display contrast due to external light.
- the vibration resistance and impact resistance of the display device can be improved.
- a driver for driving the display panel is required. Since the driver is provided at the end of the substrate of the display panel, the display device is provided with a housing called a bezel to protect the driver.
- FIG. 5 is a schematic cross-sectional view showing a configuration of a conventional first and second display device including a bezel.
- the display device 200 includes a liquid crystal display panel 10, a cover substrate 30, an adhesive layer 22 that bonds the display panel 10 and the cover substrate 30, a driver 37 that drives the liquid crystal display panel 10, and a driver 37. And a bezel 70 for protection.
- the adhesive layer 22 is a double-sided tape if it is a conventional first display device, and an adhesive if it is a conventional second display device.
- a TFT array substrate 11 and a color filter substrate (CF substrate) 12 disposed to face each other are bonded together via a sealing material (not shown), and a liquid crystal layer is sandwiched between both substrates.
- CF substrate color filter substrate
- the TFT array substrate 11 and the CF substrate 12 are respectively provided with polarizing plates 13a and 13b on the main surface opposite to the liquid crystal layer.
- a driver 37, a terminal (not shown), and the like are mounted on the overhanging portion 11a of the TFT array substrate 11.
- the distance d between the driver 37 and the cover substrate 30 is narrowed as the mobile terminal becomes thinner and smaller.
- the distance d between the driver 37 and the cover substrate 30 is about 0.5 mm, but in the conventional second display device, the distance d is 0.2 mm or less. It can only be secured. Therefore, when the display device 200 receives an impact due to dropping or the like, there is a high possibility that the driver 37 and the cover substrate 30 come into contact with each other. When the driver 37 and the cover substrate 30 are in contact with each other, a “driver crack” in which the driver 37 is cracked or damaged may occur, so there is room for improvement in terms of protecting the driver 37. Further, the use of tempered glass has begun for the cover substrate 30, and this also increases the possibility of driver cracking when the driver 37 contacts the cover substrate 30.
- the present invention has been made in view of the above-described present situation, and an object of the present invention is to provide a display device capable of suppressing the occurrence of driver cracks caused by dropping or the like and a method for manufacturing the same.
- the inventors of the present invention have made various studies on a display device including a substrate for protecting the display panel and a method for manufacturing the display device, and have focused on the gap between the driver and the substrate. And if this gap is narrowed, the possibility that the driver and the substrate will come into contact with each other when receiving an impact due to dropping or the like is increased, and a resin member for buffering the impact is provided between the driver and the substrate.
- the inventors have found that it is possible to suppress the occurrence of driver cracks caused by dropping and the like, and have conceived that the above-mentioned problems can be solved brilliantly, and have reached the present invention.
- the present invention includes a display panel, a driver for driving the display panel, a substrate disposed on the display surface side of the display panel, and an adhesive layer for bonding the display panel and the substrate.
- the driver is provided between the substrate and the substrate at an end portion of the display panel, and a resin member for buffering an impact is provided between the driver and the substrate. Display device.
- the present invention is also a method for manufacturing the display device, wherein the manufacturing method includes forming a through-hole in the substrate so as to form a through-hole at a position facing the end of the display panel where the driver is provided.
- a display device comprising: a step, a resin injection step of injecting a resin from the through hole to cover at least a surface of the driver facing the substrate, and a resin member forming step of curing the resin to form a resin member It is a manufacturing method.
- the present invention is described in detail below.
- the display panel may be an FPD, and examples thereof include a liquid crystal display device, a PDP, an organic EL display, and an FPD such as an FED.
- a display panel of a liquid crystal display device which is a typical display panel serving as an FPD, has, for example, a structure in which a liquid crystal layer is sandwiched in a cell in which a TFT array substrate and a CF substrate are bonded together with a sealant.
- the TFT array substrate and the CF substrate are each provided with a polarizing plate on the main surface opposite to the liquid crystal layer.
- the driver drives the display panel, and is provided between the substrate and an end of the display panel.
- the driver is mounted together with the terminals and the like on the end portion (projecting portion) of the TFT array substrate.
- the substrate is disposed on the display surface side of the display panel so as to cover at least a display area of the display panel.
- the region corresponding to at least the display region of the substrate is preferably transparent.
- the adhesive layer for bonding the display panel and the substrate is not particularly limited, but an adhesive layer capable of adhering them over substantially the entire surface is preferable in terms of impact resistance and the like.
- the adhesive layer is preferably colorless and transparent.
- the adhesive layer is colored, the display image is colored, and when the adhesive layer has haze such as white turbidity, the display image is blurred and reaches the observer. Therefore, if the adhesive layer is colorless and transparent, light from the display panel is not colored by the adhesive layer or is not shielded and the image display is not blurred, so that the image can be displayed more clearly.
- a resin member for buffering an impact is provided between the driver and the substrate.
- the distance between the driver and the substrate becomes narrower as the mobile terminal becomes thinner and smaller, and the driver and the substrate may come into contact when the display device receives an impact due to dropping or the like. Is growing.
- the resin member between the driver and the substrate even if the gap between the driver and the substrate is narrow, they are not in direct contact with each other. Moreover, even if both collide via a resin member, an impact can be relieved by the resin member.
- the display device of the present invention it is possible to mitigate the impact when the driver and the substrate collide due to dropping or the like, thereby suppressing the occurrence of driver cracks.
- the configuration of the display device of the present invention is not particularly limited as long as such components are formed as essential elements, and may or may not include other components. .
- the substrate has at least one through hole formed at a position facing an end portion of the display panel where the driver is provided. If such a through hole is formed, the resin member can be easily formed using the through hole in the manufacturing process of the display device of the present invention described later.
- the resin member may be provided between the display panel and the substrate at the end of the display panel. From the viewpoint of more reliably and sufficiently exhibiting the effects of the present invention, the resin member preferably covers the entire surface of the driver. As a result, it is possible to further reduce the impact caused by the drop of the display device and suppress the occurrence of driver cracks.
- the resin member preferably has an elastic modulus of 1 ⁇ 10 6 Pa or less.
- the resin member can be said to be an impact buffering member for preventing the driver and the substrate from colliding with each other and causing a driver crack when the display device receives an impact due to dropping or the like.
- Driver cracks occur because the substrate is harder than the driver. Therefore, in order to prevent driver cracking, the driver and the substrate collide with each other through a resin member that is softer than the substrate, that is, has flexibility.
- Specific examples of the flexibility index include elastic modulus. From the viewpoint of more reliably and sufficiently exhibiting the effects of the present invention, the resin member has an elastic modulus of 1 ⁇ 10 6 Pa or less. It is preferably 1 ⁇ 10 5 Pa or less, more preferably 1 ⁇ 10 4 Pa or less.
- the elastic modulus can be measured by the method described in JIS-K7113.
- thermosetting resin a thermosetting resin
- photocurable resin an ultraviolet curable resin
- acrylic optical elastic resin SVR, Super View Resin
- the substrate may be a cover substrate.
- the cover substrate is a substrate for protecting the display panel from dust and impact, and is provided so as to cover at least the display region.
- the cover substrate generally has a structure in which a region corresponding to the display region is a light-transmitting window portion, and the periphery of the window portion is a black edge colored in black or the like so as to be a light-shielding portion. It is.
- the cover substrate is usually positioned on the outermost layer of the display surface, providing the cover substrate can provide a display device with better design.
- the window portion of the cover substrate may be colorless or colored.
- the display device 100 can display an image having the same color tone as that displayed on the liquid crystal display panel 10, while when the window 32 is colored, the display device 100 can display an image displayed on the liquid crystal display panel 10 as an image changed to a color tone such as blue or red.
- the planar shape of the cover substrate 30 is not particularly limited, and examples thereof include a rectangular shape, an elliptical shape, a rectangular shape with rounded corners, and a shape in which a rectangular shape and an elliptical shape are combined. Furthermore, the planar shape of the window part 32 and the black edge part 31 is not specifically limited, What is necessary is just to set suitably according to a desired design.
- the through hole formed in the substrate can be hidden by a decorative board, a seal, a logo, or the like. Further, the through hole can be made inconspicuous by setting the color of the resin forming the resin member to the same color as the color of the surrounding display panel in which the through hole is formed.
- the display panel in the present invention may be a liquid crystal display panel or an organic electroluminescence display panel.
- the display apparatus of this invention can be utilized suitably as a portable terminal.
- the present invention also relates to a method for manufacturing a display device according to the present invention, wherein the manufacturing method includes a through hole that forms a through hole in the substrate at a position facing the end of the display panel where the driver is provided.
- a display device comprising: a forming step; a resin injecting step of injecting a resin from the through hole to cover at least a surface of the driver facing the substrate; and a resin member forming step of curing the resin to form a resin member It is a manufacturing method. According to this manufacturing method, the display device of the present invention that can suppress the occurrence of driver cracks can be easily realized.
- At least one through hole may be formed at a position facing the end of the display panel where the driver is provided, and a plurality of through holes may be formed.
- the size and shape of the through hole are not particularly limited as long as the resin can be easily injected.
- the display device of the present invention it is possible to inject a resin from the side of the display panel to form a resin member.
- the viscosity of the injected resin should be low, and preferably set to 1 Pa ⁇ s or less. In this case, since it is necessary to manage the process so that the resin does not leak and ooze out on the backlight or the like, the manufacturing process becomes complicated.
- the driver can be protected by a simple process of injecting the resin from the through hole formed in the substrate.
- the resin injected from the through hole may cover at least the surface of the driver facing the substrate so as to protect the driver provided at the end of the substrate, but covers the entire surface of the driver. Further, it may be injected into the entire space formed between the display panel and the substrate. Note that since this space is a minute space, the outflow of the resin from the display panel can be suppressed by adjusting the viscosity of the resin to be injected. When the viscosity of the resin is low, the gap between the display panel and the substrate may be covered with a protective member or the like so as to prevent the resin from flowing out, and the protective member or the like may be removed after the resin is cured.
- thermosetting resin As the resin for forming the resin member, a photo-curing resin can be used, but the injected resin may not be sufficiently irradiated with light depending on the color or material of the substrate.
- a thermosetting resin when used, the resin can be easily cured by heating, and thereby a resin member can be easily formed. Therefore, the display device of the present invention can be manufactured with high productivity. In addition, the driver can be covered (fixed) more easily.
- the resin preferably has a viscosity of 1 to 4 Pa ⁇ s (1000 to 4000 cps) and an elastic modulus after curing of 1 ⁇ 10 6 Pa or less.
- the elastic modulus of the cured resin is as described above.
- the adhesive layer that bonds the substrate and the display panel may be formed of a thermosetting resin.
- the adhesive layer is cured and the resin member is formed.
- the resin can be cured at the same time, and the productivity can be further improved.
- the manufacturing method of the display device of the present invention is not particularly limited by other steps as long as the method includes the above steps.
- the display device and the manufacturing method thereof of the present invention it is possible to suppress the occurrence of driver cracks caused by dropping or the like.
- FIG. 1A and 1B are schematic cross-sectional views of a display device according to Embodiment 1 of the present invention.
- FIG. 1A shows an overall view of the display device
- FIG. 1B is a broken line in FIG. An enlarged view of the enclosed area is shown.
- FIG. 2 is a schematic plan view of the cover substrate according to Embodiment 1 of the present invention.
- FIG. 3 is a schematic plan view of the display device according to Embodiment 1 of the present invention.
- a display device 100 includes a liquid crystal display panel 10, a cover substrate 30 disposed on the display surface side of the liquid crystal display panel 10, and an adhesive provided between the liquid crystal display panel 10 and the cover substrate 30.
- the liquid crystal display device includes an agent layer 21, a backlight unit (not shown) disposed on the back side of the liquid crystal display panel 10, and a casing (not shown) that holds such components. That is, the display device 100 has a structure in which the liquid crystal display panel 10 and the cover substrate 30 are bonded together by the adhesive layer 21.
- the liquid crystal display panel 10 is an active matrix liquid crystal display panel in which pixels are arranged in a matrix, and includes a TFT array substrate 11, a color filter substrate (CF substrate) 12, and a sealing material (a sealing material for bonding both substrates). (Not shown).
- the TFT array substrate 11 and the CF substrate 12 are disposed to face each other, and are bonded together with a sealing material so as to maintain a predetermined gap.
- the empty panel thus formed is filled with a liquid crystal material (not shown). Therefore, the liquid crystal display panel 10 has a structure in which the liquid crystal layer is sandwiched between the TFT array substrate 11 and the CF substrate 12.
- the sealing material is a member for sealing the liquid crystal layer between the TFT array substrate 11 and the CF substrate 12, and is disposed in a region other than the display region where image display is performed, that is, a region outside the display. Moreover, it does not specifically limit as a material of a sealing material and a liquid crystal layer, What is necessary is just to select suitably.
- the TFT array substrate 11 has a thin film transistor (TFT) as a switching element, a pixel electrode, a data wiring, a scanning wiring, etc. as a constituent element of the display element of the liquid crystal display panel 10 on the liquid crystal layer side of the colorless and transparent insulating substrate.
- TFT thin film transistor
- An alignment film or the like is provided.
- the TFT array substrate 11 has a protruding portion 11a protruding from the CF substrate 12, and a terminal (not shown) is provided on the protruding portion, and a driver An FPC (Flexible Printed Circuit) board 14 on which 37 and the like are mounted is connected.
- FPC Flexible Printed Circuit
- the CF substrate 12 is provided with members such as a black matrix (BM), red, blue and green color filters, a common electrode, and an alignment film on the liquid crystal layer side of the colorless and transparent insulating substrate.
- BM black matrix
- red, blue and green color filters red, blue and green color filters
- common electrode common electrode
- alignment film on the liquid crystal layer side of the colorless and transparent insulating substrate.
- the material of the insulating substrate constituting the TFT array substrate 11 and the CF substrate 12 is not particularly limited, but glass, resin (plastic), etc. are preferable. These materials are preferable in that they are excellent in translucency and workability.
- Polarizing plates 13a and 13b are provided on the main surface opposite to the liquid crystal layer, respectively.
- Polarizers 13a and 13b are made of a protective layer in which a polarizer formed from a polyvinyl alcohol (PVA) film adsorbed with an iodine complex or a dichroic dye is formed from a cellulose polymer such as triacetyl cellulose (TAC). It has a sandwiched configuration.
- a viewing angle compensation film such as a retardation plate may be disposed between the TFT array substrate 11 and / or the CF substrate 12 and the polarizing plate.
- the adhesive layer 21 is provided on substantially the entire area where the liquid crystal display panel 10 and the cover substrate 30 face each other. Thereby, the vibration resistance and impact resistance of the display device 100 can be improved. Further, the adhesive layer 21 is a colorless and transparent layer in which the adhesive is cured, so that the observer can visually recognize the image displayed on the liquid crystal display panel 10 more clearly.
- the adhesive may be a thermosetting resin and / or a photocurable resin.
- the haze of the adhesive layer 21 is preferably 3% or less (more preferably 1% or less).
- the refractive index of the adhesive layer 21 is aligned with the refractive index of the material (glass, resin, etc.) of the cover substrate 30 and the refractive index of the protective layer of the polarizing plate 13a.
- the refractive index of the protective layer of the adhesive layer 21, the cover substrate 30, and the polarizing plate 13a is set to about 1.48 to 1.52.
- the distance between the liquid crystal display panel 10 and the cover substrate 30, that is, the thickness of the adhesive layer 21 is set to 50 ⁇ m or more (more preferably 100 ⁇ m or more).
- the adhesive layer 21 can effectively function as a buffer layer that relieves pressure and impact. Therefore, it is possible to prevent the pressure generated by a human finger from the cover substrate 30 side or the impact generated when an object falls on the cover substrate 30 from being directly transmitted to the liquid crystal display panel 10.
- the adhesive layer 21 is set so that the storage elastic modulus at 23 ° C. is 1.0 ⁇ 10 3 to 1.0 ⁇ 10 6 Pa.
- the adhesive contains a resin
- the internal stress can be effectively absorbed by the elasticity of the adhesive layer 21 itself. Accordingly, the display quality of the display device 100 can thereby be improved.
- the cover substrate 30 is a substrate for protecting the liquid crystal display panel 10 from dust and impact, and is provided so as to cover at least the display area. Details of the cover substrate 30 will be described with reference to FIG.
- the cover substrate 30 includes a window portion 32 that is a light-transmitting portion formed corresponding to the display area, and a black edge portion 31 that is a light-shielding portion provided around the window portion.
- the window part 32 and the black edge part 31 are comprised by the integral member.
- the window part 32 consists of transparent members, such as glass and resin, and the black edge part 31 colors this transparent member.
- the cover substrate 30 has design properties, and the design properties of the display device 100 can be further improved, and terminals, wirings, and the like arranged on the outer edge of the liquid crystal display panel 10 by the black edge portion 31 are provided.
- the part which should be hidden can be made hard to be visually recognized effectively.
- At least one through hole 35 is formed at a position facing the end portion where the driver 37 of the liquid crystal display panel 10 is provided.
- three through holes 35 are formed.
- the display device 100 including the cover substrate 30 is filled with resin from the through hole 35, and the resin is cured to cure the resin member 36. Is formed.
- the resin member 36 is formed by filling the gap between the protruding portion 11 a of the TFT array substrate 11 and the cover substrate 30 to form the resin member 36, and the entire surface of the driver 37 is covered with the resin member 36. .
- the entire surface of the driver 37 is covered with the resin member 36 as described above, even if the display device 100 is dropped or the like, the driver 37 is protected by the resin member 36, so that driver cracks can be reduced.
- FIG. 4A to 4D are schematic cross-sectional views illustrating each manufacturing process of the display device according to the first embodiment.
- FIG. 4A is a schematic cross-sectional view showing the cover substrate 30 in which the through holes 35 are formed by the through hole forming step.
- the cover substrate 30 has a window portion 32 and a black edge portion 31.
- the material of the cover substrate 30 is not particularly limited as long as it has a certain degree of strength and can be transparent, but glass, tempered glass, resin, etc. can be applied, and the ease of forming the through-hole 35 is improved. In consideration, glass or resin is preferable.
- a method of forming the black edge portion 31 is not particularly limited, but a method of printing black ink on the main surface of the cover substrate 30 on the adhesive layer 21 side is preferable.
- the cover substrate 30 may be provided with an edge other than black, or may be provided with an edge made of a plurality of colors.
- the through hole 35 is formed in the cover substrate 30 having the above-described configuration at a position facing the end portion where the driver 37 of the liquid crystal display panel 10 is provided.
- FIG. 4B shows a state where the cover substrate 30 in which the through holes 35 are formed is attached to the liquid crystal display panel 10 via the adhesive layer 21.
- the liquid crystal display panel 10 is a liquid crystal display panel 10 manufactured by a general method.
- the liquid crystal mode is not particularly limited, and various modes such as a TN (Twisted Nematic) mode, an IPS (In Plane Switching) mode, and a VATN (Vertical Alignment Twisted Nematic) mode can be applied.
- the liquid crystal display panel 10 may be one obtained by orientation division.
- the liquid crystal display panel 10 may be any of a transmission type, a reflection type, and a semi-transmission type (reflection / transmission type).
- the arrangement relationship of the polarization axes of the polarizing plates 13a and 13b constituting the liquid crystal display panel 10 is set in accordance with the liquid crystal mode.
- the polarizing plates 13a and 13b are arranged in crossed Nicols or parallel Nicols. Then, by connecting the FPC board 14 to the liquid crystal display panel 10, a liquid crystal display module is manufactured.
- the adhesive layer 21 is formed by applying an adhesive at a predetermined position and curing it.
- the adhesive may be applied to the polarizing plate 13a or the cover substrate 30 formed on the main surface of the CF substrate 12 of the liquid crystal display panel 10, or may be applied to both the polarizing plate 13a and the cover substrate 30.
- an adhesive having a thickness of about 50 to 200 ⁇ m is applied to the polarizing plate 13a of the liquid crystal display panel 10 using a nozzle such as a slit coater.
- the liquid crystal display panel 10 is pressurized by pressurizing the cover substrate 30 with a pressurizing unit. And the space
- substrate 30 is controlled to a desired value.
- a pressurization pressure is not specifically limited, What is necessary is just to be about 50 kPa, for example.
- the cover substrate 30 is moved in the horizontal direction by a position adjusting means such as a chuck, and the liquid crystal display panel 10 and the cover substrate 30 are aligned. Then, the cover substrate 30 is fixed to the liquid crystal display panel 10 by holding the liquid crystal display panel 10 and the cover substrate 30 at appropriate positions for about 10 minutes until the curing of the adhesive is completed.
- FIG. 4C is a schematic cross-sectional view showing a state where the resin 36 a is injected from the through hole 35 of the cover substrate 30 in the resin injection step.
- the molten resin 36a is injected using a jig such as a dispenser.
- the viscosity of the resin 36a in the molten state is 3 Pa ⁇ s.
- the injected resin 36 a covers at least the surface of the driver 37 facing the cover substrate 30.
- the resin 36 a covers the entire surface of the driver 37.
- FIG. 4C the space between the cover substrate 30 and the liquid crystal display panel 10 is enlarged for the sake of convenience, but since it is actually a minute space, resin is injected from the through hole 35. Even so, the resin is injected without flowing out of the liquid crystal display panel 10.
- FIG. 4D shows a state in which the resin member 36 is formed by curing the resin 36 a in the resin member forming step.
- the resin 36a is cured by heating. Thereby, the resin member 36 is formed, and the display device 100 of the present invention is formed.
- the elastic modulus of the resin member 36 is 1 ⁇ 10 6 Pa, and the elastic modulus was measured based on the method described in JIS-K7113.
- the display device 100 is obtained by combining the liquid crystal display module in which the cover substrate 30 is attached to the liquid crystal display panel 10 and the backlight unit, the housing, and the like.
- a structure of a backlight unit what is necessary is just to have general structures, such as a light source, a reflecting plate, and optical sheets.
- the backlight unit may be a direct type or an edge light type.
- the resin member 36 is formed between the driver 37 and the cover substrate 30, cracks in the driver 37 can be reduced. As a result, the reliability and productivity of the display device 100 can be improved.
- the following drop test was conducted using the display device 100 configured as described above.
- (Drop test) In an atmosphere of normal temperature (25 ° C.), the display device 100 was freely dropped from a height of 50 cm and examined for the presence of driver cracks. This operation was performed for five display devices 100. And the thing which did not generate
- the height of dropping the display device 100 was changed to 60 cm and 70 cm, and a test similar to the above was performed.
- a test similar to the above was performed using the conventional display device shown in FIG. 5 in which the resin member 36 is not provided. The obtained measurement results are shown in Table 1.
- the display device 100 did not cause driver cracking even when dropped from any height of 50 cm, 60 cm, and 70 cm.
- driver cracks did not occur when dropped from a height of 50 cm, but two drivers out of five when dropped from a height of 60 cm. Cracks occurred, and when falling from a height of 70 cm, driver cracks occurred for all five.
- the display device 100 according to the embodiment of the present invention can suppress the occurrence of driver cracking due to dropping or the like, and is excellent in impact resistance. Further, unlike a conventional display device, since a bezel or the like for protecting the driver 37 is not required, the display device can be further reduced in thickness and size.
- thermosetting resin is used as the resin forming the resin member 36, but the present invention is not limited to this.
- a photocurable resin an ultraviolet curable resin is preferable, and specifically, an acrylic optical elastic resin (SVR) proposed by Sony Chemical & Information Device, Kyoritsu Kagaku, etc. is preferably used. it can.
- SVR acrylic optical elastic resin
- the resin that forms the resin member 36 is injected from the through hole 35 formed in the cover substrate 30, but the present invention is not limited to this.
- the resin member 36 may be provided in advance on the upper portion of the driver 37 or the like.
- the resin injection from the side of the driver 37 may be difficult because the gap between the substrate and the driver 37 becomes smaller as the display device becomes thinner and smaller, and the resin member 36 is previously attached to the driver 37. It may be difficult to form on the top of the substrate. Therefore, the resin member 36 cannot be easily formed as in the manufacturing method of the present invention described above.
- the active matrix type liquid crystal display panel has been described as an example of the liquid crystal display panel 10, but the present invention is not limited to this, and various liquid crystal display panels 10 can be used.
- the display device 100 according to the present embodiment may include an organic EL panel, a PDP, or an FED panel as a display panel instead of the liquid crystal display panel 10. That is, the display device 100 may be an organic EL display, a PDP, or an FED, but is preferably a liquid crystal display device or an organic EL display. Thereby, the display apparatus 100 can be used suitably as a portable terminal.
- the display panel of the display device 100 is not particularly limited as long as it is a display panel in which a display region is configured by pixels arranged in a matrix. Therefore, the driving method of the liquid crystal display panel 10 described above may be a simple matrix type.
- a display element including an electrode, an organic thin film containing a light emitting material, or the like is used instead of a display element using liquid crystal.
- a display panel may be manufactured.
- the display device 100 when PDP is applied to the display panel of the display device 100, the display device 100 includes a display element including an electrode, a dielectric, a rare gas, a phosphor, and the like instead of the display element using liquid crystal.
- a display panel may be manufactured.
- the display panel of the display device 100 is formed by using a display element composed of a microchip, a gate electrode, a phosphor, or the like instead of the display element using liquid crystal. What is necessary is just to produce.
- the adhesive layer 21 is formed of an adhesive.
- the present invention is not limited to this, and a resin member is also formed for a display device in which the adhesive layer 21 is formed of a double-sided tape or the like. It is possible.
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Abstract
Description
以下に本発明を詳述する。
本発明の表示装置の構成としては、このような構成要素を必須として形成されるものである限り、その他の構成要素を含んでいても含んでいなくてもよく、特に限定されるものではない。
本発明の効果をより確実かつ充分に発揮する観点からは、上記樹脂部材は、上記ドライバの全面を覆うことが好ましい。これにより、表示装置の落下等による衝撃をより一層緩和してドライバ割れの発生を抑制できる。
図1は、本発明の実施形態1における表示装置の断面模式図であり、図1(a)は、表示装置の全体図を示し、図1(b)は、図1(a)において破線で囲まれた領域の拡大図を示す。図2は、本発明の実施形態1におけるカバー基板の平面模式図である。図3は、本発明の実施形態1における表示装置の平面模式図である。
(落下試験)
常温(25℃)の雰囲気下で、表示装置100を50cmの高さから自由落下させてドライバ割れの有無を調べた。この動作を5個の表示装置100について行った。そして、落下後にドライバ割れが発生しなかったものを○、ドライバ割れが発生したものを×として評価した。また、表示装置100を落下させる高さを60cm、70cmと変更して、上記と同様の試験を行った。更に比較実施形態として、樹脂部材36が設けられていない、上記図5に示した従来の表示装置を用いて、上記と同様の試験を行った。
得られた測定結果を表1に示す。
また本実施形態の表示装置100は、液晶表示パネル10に代えて、表示パネルとして、有機ELパネル、PDP又はFEDパネルを備えてもよい。すなわち、表示装置100は、有機ELディスプレイであってもよいし、PDPであってもよいし、FEDであってもよいが、なかでも液晶表示装置又は有機ELディスプレイであることが好ましい。これにより、表示装置100を携帯端末として好適に利用することができる。
11 TFTアレイ基板
11a 張出部
12 CF基板
13a、13b 偏光板
14 FPC基板
21 接着剤層(硬化後の接着剤)
22 接着剤層
30 カバー基板
31 黒縁部(遮光部分)
32 窓部(透光部分)
35 注入口
36 樹脂部材
36a 樹脂(未硬化)
37 ドライバ
40 ノズル
70 ベゼル
100、200 表示装置
Claims (9)
- 表示パネルと、
該表示パネルを駆動するためのドライバと、
該表示パネルの表示面側に配置された基板と、
該表示パネル及び該基板を貼り合わせる接着剤層とを備えた表示装置であって、
該ドライバは、該表示パネルの端部において該基板との間に設けられ、
該ドライバと該基板との間には、衝撃を緩衝するための樹脂部材が設けられていることを特徴とする表示装置。 - 前記基板は、前記表示パネルの前記ドライバが設けられた端部と対向する位置に少なくとも1つの貫通孔が形成されていることを特徴とする請求項1記載の表示装置。
- 前記樹脂部材は、前記ドライバの全面を覆うことを特徴とする請求項1記載の表示装置。
- 前記樹脂部材は、弾性率が1×106Pa以下であることを特徴とする請求項1記載の表示装置。
- 前記基板は、カバー基板であることを特徴とする請求項1記載の表示装置。
- 前記表示パネルは、液晶表示パネル又は有機エレクトロルミネセンス表示パネルであることを特徴とする請求項1記載の表示装置。
- 請求項1記載の表示装置の製造方法であって、
該製造方法は、
前記基板において、前記表示パネルの前記ドライバが設けられた端部と対向する位置に貫通孔を形成する貫通孔形成工程と、
該貫通孔から樹脂を注入して少なくとも該ドライバの該基板との対向面を覆う樹脂注入工程と、
該樹脂を硬化して樹脂部材を形成する樹脂部材形成工程とを含むことを特徴とする表示装置の製造方法。 - 前記樹脂として熱硬化性樹脂を用い、
前記樹脂部材形成工程では、該樹脂を加熱して硬化することを特徴とする請求項7記載の表示装置の製造方法。 - 前記樹脂は、粘度が1~4Pa・sであり、硬化後の弾性率が1×106Pa以下であることを特徴とする請求項7記載の表示装置の製造方法。
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US13/122,974 US20110199348A1 (en) | 2008-10-17 | 2009-07-08 | Display device and manufacturing method thereof |
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Also Published As
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JPWO2010044291A1 (ja) | 2012-03-15 |
CN102177538A (zh) | 2011-09-07 |
US20110199348A1 (en) | 2011-08-18 |
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