WO2007132586A1 - 表示パネルの製造方法、表示パネルの製造装置、及び表示パネル - Google Patents
表示パネルの製造方法、表示パネルの製造装置、及び表示パネル Download PDFInfo
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- WO2007132586A1 WO2007132586A1 PCT/JP2007/054718 JP2007054718W WO2007132586A1 WO 2007132586 A1 WO2007132586 A1 WO 2007132586A1 JP 2007054718 W JP2007054718 W JP 2007054718W WO 2007132586 A1 WO2007132586 A1 WO 2007132586A1
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- alignment film
- display panel
- film
- repair
- manufacturing
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
-
- 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
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/69—Arrangements or methods for testing or calibrating a device
Definitions
- the present invention relates to a display panel manufacturing method, a display panel manufacturing apparatus, and a display panel.
- a liquid crystal panel which is a main component of a liquid crystal display device, has a structure in which a liquid crystal is sandwiched between a pair of glass substrates. On the inner surface side of one glass substrate, TFTs and pixel electrodes as active elements are arranged. A color filter, a counter electrode, and the like are provided on the inner surface side of the other glass substrate. An alignment film for regulating the alignment state of the liquid crystal molecules is formed on the surfaces of both glass substrates in contact with the liquid crystal.
- Patent Document 1 As an example of a liquid crystal panel provided with an alignment film, one described in Patent Document 1 below is known.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-106997
- the present invention has been completed based on the above-described circumstances, and an object thereof is to reduce manufacturing costs.
- the method for producing a display panel of the present invention includes the step of manufacturing the alignment film in the process of manufacturing a display panel having a configuration in which a liquid crystal is sandwiched between a pair of substrates opposed to each other and an alignment film is formed on opposite surfaces of both substrates.
- An inspection process for inspecting the presence or absence of a film defect part, a position detection process for detecting the position of the film defect part, and repairing the film defect part by attaching an alignment film repair agent to at least a part of the film defect part I went through the repair process.
- the display panel manufacturing apparatus of the present invention is a display panel manufacturing apparatus having a configuration in which liquid crystal is sandwiched between a pair of substrates facing each other and an alignment film is formed on the opposing surfaces of both substrates. And an inspection means for inspecting the presence or absence of a film defect portion of the alignment film, a position detection means for detecting the position of the film defect portion, and an alignment film repair agent attached to at least a part of the film defect portion to form a film It was set as the structure provided with the repair agent adhesion means which repairs a defect
- the display panel of the present invention includes a pair of light-transmitting substrates facing each other, a liquid crystal sandwiched between both substrates, an alignment film formed on opposing surfaces of both substrates, and an alignment film And a repaired part in which an alignment film repairing agent is attached to at least a part of the film defect generated in the above.
- the film defect portion is detected in the inspection process, the position of the film defect portion is subsequently detected in the position detection process. Thereafter, in the repair process, the film defect portion is repaired by attaching an alignment film repair agent to at least a part of the film defect portion.
- the yield can be improved as compared with the conventional case where the alignment film in which the film defect portion is generated is re-formed.
- the alignment film repair agent is added.
- Adhering transfer means force A stamp method for transferring an alignment film repair agent to the film defect portion is used.
- the repair agent attaching means in the display panel manufacturing apparatus includes a transfer unit that transfers the alignment film repair agent to the film defect portion. This makes it easier to control the thickness of the repaired part in the repair process than when using a method of dropping a droplet of the alignment film repair agent on the film defect portion, for example.
- the alignment film repair agent is transferred by pressing a transfer head having the alignment film repair agent attached thereto against the film defect portion.
- the transfer means in the display panel manufacturing apparatus includes a transfer head to which the alignment film repair agent is attached and pressed against the film defect portion. This makes it easy to control the thickness of the repaired portion by adjusting the time and pressure for pressing the transfer head against the film defect portion. Further, when the film defect portion is locally generated, the repair becomes easier as compared with the case where the alignment film repair agent is transferred by a transfer roller, for example.
- the alignment film repairing agent used in the method for manufacturing the display panel a material obtained by dissolving an alignment film material in a solvent, and after repairing the transfer head in the alignment film repairing agent is used. Immerse in and wait.
- the alignment film repair agent formed by dissolving the alignment film material in a solvent is stored, and the drying prevention unit is configured to accommodate the transfer head waiting after repair. It is set as the structure provided with. This can prevent the alignment film repair agent from drying on the surface of the transfer head after repair.
- the transfer head made of a flexible porous material is used. Further, the transfer head in the display panel manufacturing apparatus is configured to have a flexible porous material force. This makes it easier to control the thickness of the repaired part. Even when there is a step near the film defect portion, the alignment film repair agent can be reliably attached to the film defect portion by deforming the flexible transfer head.
- a surface modification step for facilitating adhesion of the alignment film repair agent to the film defect portion is performed.
- the display panel manufacturing apparatus includes a surface modifying unit that modifies the surface of the film defect portion so that the alignment film repair agent easily adheres to the film defect portion. As a result, the alignment film repair agent easily adheres to the film defect portion in the repair process, so that the repair can be reliably performed.
- the film defect portion is irradiated with ultraviolet light.
- the surface modification means in the display panel manufacturing apparatus includes an ultraviolet light irradiation unit that irradiates the film defect portion with ultraviolet light.
- an ultraviolet light irradiation unit that irradiates the film defect portion with ultraviolet light.
- the ultraviolet light irradiation unit is 146 ⁇ ! The ultraviolet light having a wavelength of up to 365 nm is irradiated. Thereby, it is possible to improve the surface of the film defect portion more suitably.
- a step portion for regulating the alignment state of the liquid crystal is formed, and the alignment film is formed along the step portion.
- the configuration As a result, in the case where the stepped portion is formed on the surface of the substrate, the laying area of the alignment film on the substrate tends to be large, and thus the film defect portion tends to be easily formed.
- the alignment film repair agent By attaching the alignment film repair agent to form the repaired part, the film defect part can be repaired, so that the yield improvement effect can be enhanced.
- the thickness of the repaired portion of the display panel is set to 50 nm to 200 nm! / The configuration. Thereby, a favorable display performance can be obtained.
- FIG. 1 is a cross-sectional view of a liquid crystal display device according to an embodiment of the present invention.
- FIG. 2 is an enlarged plan view of the array substrate.
- FIG. 3 is an enlarged cross-sectional view of a liquid crystal panel.
- FIG. 4 is a schematic side view of the inspection and repair device.
- FIG. 5 is a block diagram of the inspection / repair device.
- FIG. 6 is a view showing a container for accommodating a transfer head.
- FIG. 7 is a cross-sectional view showing a state in which foreign matter has adhered to the substrate.
- FIG. 8 is a sectional view showing a state in which excimer UV light is irradiated to the pinhole of the CF substrate.
- FIG. 9 is a cross-sectional view showing a state where the transfer head is positioned in the pinhole.
- FIG. 10 is a cross-sectional view showing a state in which the transfer head is pressed against the pinhole.
- FIG. 11 is a cross-sectional view showing a state in which the alignment film repair agent is attached to the pinhole.
- FIG. 12 is a cross-sectional view showing a state where the transfer head is pressed against the pinhole, which is smaller than the transfer head.
- FIG. 13 is a cross-sectional view showing a state in which an alignment film repairing agent is attached to pinholes and alignment films that are smaller than the transfer head.
- FIG. 14 is a cross-sectional view showing a state in which excimer UV light is irradiated to the pinholes of the array substrate.
- FIG. 15 is a cross-sectional view showing a state where the transfer head is positioned in the pinhole.
- FIG. 16 is a cross-sectional view showing a state where the transfer head is pressed against the pinhole.
- FIG. 17 is a cross-sectional view showing a state in which the alignment film repair agent is attached to the pinhole.
- Transfer head Transfer means (transfer device), Repair agent attachment means (Repair agent attachment device) 50 ... Alignment film repair agent
- FIGS. An embodiment of the present invention will be described with reference to FIGS.
- the liquid crystal panel 11 constituting the liquid crystal display device 10 is illustrated.
- the lower side shown in FIG. 1 the lower side shown in FIG. 1
- the liquid crystal display device 10 roughly includes a liquid crystal panel 11 for displaying an image, and a backlight 12 that is an external light source disposed on the back side (rear side) of the liquid crystal panel 11. Are combined with each other.
- the liquid crystal panel 11 is held in a state of being sandwiched between a backlight 12 on the back side and a bezel 13 having a substantially frame shape arranged on the front side (front side).
- the knock light 12 includes a case 14 having a substantially box shape that opens toward the front side (the liquid crystal panel 11 side), and a plurality of linear light sources accommodated in the case 14 in parallel with each other.
- 15 for example, a cold cathode tube
- optical sheets 16 for example, a diffusion plate, a diffusion sheet, a lens sheet, and a brightness enhancement sheet in order from the back side
- the optical sheet 16 group includes a substantially frame-like frame 17 for holding the optical sheet 16 group between the optical sheet 16 and the case 14.
- Each optical sheet 16 planarizes the light emitted from each linear light source 15 It has functions such as conversion.
- the liquid crystal panel 11 is roughly sandwiched between a pair of transparent (translucent) glass substrates 18 and 19 and both substrates 18 and 19, and the optical characteristics change with the application of an electric field.
- Liquid crystal 20 as a substance.
- the substrates 18 and 19 face each other and are bonded together by a spacer (not shown) with a predetermined gap (gap) therebetween, and the liquid crystal 20 sandwiched between them is sealed by the sealant 21.
- a pair of front and back polarizing plates 22 and 23 are attached to the outer surface sides of both substrates 18 and 19, respectively.
- Both substrates 18, 19 have a CF substrate 18 on the front side and an array substrate 19 on the back side.
- a large number of switching elements 24 for example, TFTs
- pixel electrodes 25 are arranged side by side on the inner surface side of the array substrate 19 (the liquid crystal 20 side and the surface facing the CF substrate 18).
- a grid-like source wiring 26 and a gate wiring 27 are disposed so as to surround the switching element 24 and the pixel electrode 25.
- the source wiring 26 and the gate wiring 27 are connected to the source electrode and the gate electrode of the switching element 24, respectively, and the pixel electrode 25 is connected to the drain electrode of the switching element 24.
- Insulating layers 28 and 29 are laminated between the pixel electrode 25 and the array substrate 19 and the wirings 26 and 27 as shown in FIG.
- the pixel electrode 25 is made of, for example, ITO (Indium-tin-oxide) and is formed in an elongated rectangular shape along the extending direction of the source wiring 26 as shown in FIG.
- An alignment film 30 for aligning the liquid crystal 20 is provided on the inner surface side of the pixel electrode 25 and the outer insulating layer 29 (between the pixel electrode 25 and insulating layer 29 and the liquid crystal 20).
- the alignment film 30 is made of a so-called vertical alignment type material (for example, polyimide) that aligns liquid crystal molecules vertically with respect to the surface of the alignment film 30 in a state where no voltage is applied to the liquid crystal 20. .
- the thickness of the alignment film 30 is, for example, about 100 nm to 200 nm.
- the pixel electrode 25 and the insulating layer 29 are used as a base of the alignment film 30. In a liquid crystal panel employing another laminated structure, a layer different from the above may be the base.
- the pixel electrode 25 (the surface of the array substrate 19) is provided with slits 31 (grooves, openings, stepped portions) so that the surface of the alignment film 30 formed along the pixel electrode 25 is formed. Is a step Has occurred.
- the slit 31 is formed in a groove shape having a predetermined width, and is formed at each of the center position in the longitudinal direction of the pixel electrode 25, the vicinity of both end positions in the longitudinal direction, and an intermediate position thereof.
- the slit 31 at the middle position is V-shaped in plan view, and the slit 31 at the center position is arranged on the side edge of the pixel electrode 25 and has a triangular shape in plan view, and the slits 31 on both ends are respectively It forms a straight line almost parallel to the slit 31 on the center side.
- the slits 31 are arranged at almost equal intervals.
- the alignment state can be regulated so that the liquid crystal molecules are inclined with respect to the vertical direction shown in FIG. 3 (the direction perpendicular to the plane directions of both substrates 18 and 19) by the step of the alignment film 30 generated by each slit 31. This eliminates the need for rubbing treatment for the alignment film 30 that has been performed in the past. Note that the depth of the slit 31 is set to reach the insulating layer 29.
- a source terminal portion and a gate terminal portion respectively formed at the ends of the source wiring 26 and the gate wiring 27 are arranged at the end portion of the array substrate 19, and SOF (Syste One end of a thin film driver (electronic component) such as m On Film) is crimped and connected via an ACF (anisotropic conductive film), and the other end of this SOF is connected to an external circuit via the ACF.
- SOF Syste One end of a thin film driver (electronic component) such as m On Film) is crimped and connected via an ACF (anisotropic conductive film), and the other end of this SOF is connected to an external circuit via the ACF.
- ACF anisotropic conductive film
- a color filter 32 is provided at a position corresponding to each pixel electrode 25. Many are arranged side by side.
- the color filter 32 has a function of allowing light of a predetermined wavelength to be transmitted but absorbing light of other wavelengths.
- the color filter 32 selectively transmits light having a wavelength corresponding to R (red), selectively transmits light having a wavelength corresponding to G (green), and supports B (blue). Three colors are set, one that selectively transmits light of the wavelength to be transmitted.
- the color filters 32 are arranged so that the colors of the adjacent color filters 32 are different from each other, for example, arranged in the order of R, G, B along the extending direction of the gate wiring 27 shown in FIG. And
- a light blocking layer 33 black matrix that blocks light from the adjacent color filter 32 side is disposed so that color mixing is prevented. It has been.
- the light shielding layer 33 is formed in a lattice shape surrounding each color filter 32. Further, on the inner surface of the color filter 32, like the pixel electrode 25, for example, a pair made of ITO is used. A counter electrode 34 is formed.
- ribs 35 projections, protrusions, stepped portions
- the rib 35 protrudes toward the array substrate 19 facing the inner surface force of the counter electrode 34, and is constituted by an elongated protrusion having a predetermined width.
- the ribs 35 are formed in a V shape in plan view, and are arranged side by side at approximately the middle positions of the adjacent slits 31 on the array substrate 19 side.
- Each rib 35 is formed such that its axial direction is substantially parallel to the extending direction of each slit 31.
- An alignment film 36 for aligning the liquid crystal 20 is formed on the inner surface side of the counter electrode 34 and the rib 35 (between the counter electrode 34 and the rib 35 and the liquid crystal 20). Steps are formed on the surface of the alignment film 36 by the ribs 35 protruding from the counter electrode 34, and the liquid crystal molecules are perpendicular to the vertical direction shown in FIG.
- the orientation state can be regulated so as to be inclined with respect to the direction in which it is made. This eliminates the need for the rubbing treatment for the alignment film 36 that has been performed in the past.
- the alignment film 36 makes the liquid crystal molecules perpendicular to the surface of the alignment film 36 in a state where no voltage is applied to the liquid crystal 20, similarly to the alignment film 30 on the array substrate 19 side. It is made of a so-called vertical alignment type material (for example, polyimide). Further, the film thickness of the alignment film 36 is, for example, ⁇ ! About 200nm.
- the counter electrode 34 and the rib 35 are used as the base of the alignment film 36. In a liquid crystal panel employing another laminated structure, a layer different from the above may be the base.
- defects may occur in the alignment films 30 and 36 during the manufacturing process.
- Defects include foreign matter defects in which foreign matter X adheres to alignment films 30 and 36, and pinhole defects in which pinholes H (film defect portions) are locally formed in alignment films 30 and 36.
- the presence or absence of defects and the type of defects are inspected. If a defect is found as a result, the position of the defect is detected and the defect is detected. I am trying to repair.
- an inspection / repair device 40 having an inspection function for inspecting the presence / absence of a defect, a position detection function for detecting the position of the defect, and a repair function for repairing the defect will be described.
- the inspection / repair device 40 is roughly composed of an inspection unit 41 and a repair unit 42. This house, As shown in FIGS. 4 and 5, the inspection unit 41 is installed in a conveyor 43 (conveying means or conveying device) that conveys the CF substrate 18 or the array substrate 19 that has undergone the film formation process, and a drive unit of the conveyor 43. And a rotary encoder 44 (driving state detecting means or driving state detecting device of the conveying means) for detecting the driving state of the driving unit and a line sensor 45 (imaging means or imaging device) for imaging the surfaces of the conveyed substrates 18 and 19. Imaging device), and a defect detection circuit 46 for processing signals output from the rotary encoder 44 and the line sensor 45.
- a conveyor 43 conveying means or conveying device
- a rotary encoder 44 driving state detecting means or driving state detecting device of the conveying means
- line sensor 45 imaging means or imaging device
- the repair unit 42 receives the defect position information output from the defect detection circuit 46, a drive circuit 47, and a UV irradiation head that repairs the defect based on the signal output from the drive circuit 47.
- 48 ultraviolet light irradiation section, surface modifying means or surface modifying apparatus
- a transfer head 49 transfer means or transferring apparatus.
- the inspection unit 41 will be described in detail.
- the conveyor 43 can transport the substrates 18 and 19 along the long side direction at a predetermined speed and in a horizontal position.
- the rotary encoder 44 can output a pulse signal based on the driving state of the driving unit of the conveyor 43 to the defect detection circuit 46.
- the substrates 18 and 19 may be transported along the short side direction.
- the line sensor 45 is provided with a large number of light receiving elements arranged in a straight line, and the direction in which the light receiving elements are arranged is orthogonal to the conveyance direction (main scanning direction) of the substrates 18 and 19 by the conveyor 43. And set in a direction along the horizontal direction. The direction in which the light receiving elements are arranged is the sub-scanning direction.
- the line sensor 45 can image the surface states of the substrates 18 and 19, and can output the light reception signals of the respective light receiving elements to the defect detection circuit 46.
- the defect detection circuit 46 Based on the light reception signal from 45, the presence / absence / type of the defect can be detected. As for the presence / absence of defects, the defect detection circuit 46 compares the surface state of adjacent pixels based on the light reception signal from the line sensor 45, and the like. The pixel is classified into a pixel having a pinhole defect. On the other hand, regarding the position of the defect, the position of the defect in the main scanning direction is detected by the pulse signal from the rotary encoder 44, and the position in the sub-scanning direction is detected by the light reception signal from the line sensor 45. Thus, the position information of the two defects (X direction and Y direction) on the substrates 18 and 19 is obtained. If a foreign substance defect is detected, a part of the alignment films 30 and 36 is removed together with the foreign substance X through a process of removing the foreign substance X, so that a pinhole H (film defect part) is formed. And then speak.
- the drive circuit 47 can move the UV irradiation head 48 and the transfer head 49 in the X, ⁇ , and Z directions based on the defect position information output from the defect detection circuit 46.
- the UV irradiation head 48 is moved to the formation position of the pinhole H in the substrates 18 and 19 based on the signal from the drive circuit 47.
- the UV irradiation head 48 includes a Xe2 excimer lamp that can irradiate excimer UV light (vacuum ultraviolet light) having a center wavelength of 172 nm as a light source. This excimer UV light adheres to the surfaces of the substrates 18 and 19 where pinholes H are generated (pixel electrode 25 and insulating layer 29 in the case of array substrate 19 and counter electrode 34 and rib 35 in the case of CF substrate 18). Organic substances can be decomposed and removed, and so-called dry cleaning can be performed.
- the light source used for the UV irradiation head 48 is, for example, a mercury lamp (center wavelength: 180 nm to 400 nm), a KrF excimer laser (wavelength: 248 nm), an Ar F excimer laser (wavelength: 193 nm), a Kr2 excimer lamp (center wavelength). : 146 nm) can be used.
- the light source used for this UV irradiation head 48 should be a light source other than the above (light source emitting ultraviolet light other than excimer UV light) that preferably emits ultraviolet light with a wavelength (center wavelength) of 146 nm to 365 nm. Of course it is possible.
- a light source that generates quasi-monochromatic light with a short center wavelength (wavelength of 200 nm or less). If this type of light source is used, the energy conversion efficiency is high due to the heat of the irradiated part. Damage can be suppressed.
- the transfer head 49 is moved to the position where the pinholes H are formed on the substrates 18 and 19 based on a signal from the drive circuit 47.
- the alignment head repair agent 50 is attached to the transfer head 49 and the alignment layer repair agent 50 is transferred to the pinhole H by pressing the transfer head 49 against the pinhole H. ( Figures 10 and 16).
- the transfer head 49 is made of a porous material having flexibility, and can absorb a predetermined amount of the alignment film repair agent 50 and can be elastically deformed.
- Alignment film repair agent 50 An alignment film material (for example, polyimide) is melted. Further, since the support shaft 49a that supports the transfer head 49 is made of, for example, glass, the alignment film repair agent 50 is difficult to be transferred from the transfer head 49 to the support shaft 49a.
- the transfer head 49 described above is placed in a container 51 (drying prevention means or dry prevention device) in which the alignment film repair agent 50 is stored, as shown in FIG. It waits in a contained state.
- a container 51 drying prevention means or dry prevention device
- the alignment film repair agent 50 is always supplied to the transfer head 49, the surface force of the transfer head 49 and the solvent of the alignment film repair agent 50 volatilize during the standby state, and the surface is dried. Can be prevented.
- the present embodiment has the above-described structure, and the operation thereof will be described next.
- the substrates 18 and 19 that have completed the process of forming the alignment films 30 and 3 6 are transferred to the inspection / repair device 40.
- the inspection process including the position detection process
- the surface state is imaged by the line sensor 45 while the substrates 18 and 19 are conveyed by the conveyor 43 as shown in FIG.
- a pulse signal based on the drive state and a light reception signal of the line sensor 45 are input to the defect detection circuit 46 from a rotary encoder 44 installed in the drive unit of the conveyor 43.
- the defect detection circuit 46 detects the presence / absence / type of a defect (foreign particle defect or pinhole defect) based on both signals. If no defect is found, the boards 18 and 19 are not transferred to the repair process, but are transferred to the next manufacturing process. If a defect is found, if the type is a foreign object defect, the boards 18 and 19 are transported to the foreign substance removal process, and if a defect is a pinhole defect, the boards 18 and 19 are sent to the repair process. And carry.
- the foreign object X is removed using a removal tool such as a dollar.
- the alignment films 30 and 36 are partially removed together with the foreign matter X removed at this time.
- a pinhole H is formed at the place where the foreign matter X has been removed.
- the substrates 18 and 19 from which the foreign matter X has been removed are transported to the repair process described below.
- the pinhole H formed in the alignment films 30 and 36 is repaired.
- a pinhole H having a form as shown in FIG. 8 is formed in the alignment film 36 on the CF substrate 18, and the base of the alignment film 36 exposed by the pinhole H (the counter electrode 34 in FIG. 8).
- the UV irradiation head 48 moved by the drive circuit 47 is positioned with respect to the pinhole H, and excimer UV light is irradiated from the UV irradiation head 48 toward the pinhole H for a predetermined time.
- This excimer UV light decomposes and removes organic substances adhering to the surface of the base exposed by the pinhole H. This improves the adhesion (wetting) of the base to the alignment film repair agent 50.
- the transfer head 49 moved by the drive circuit 47 is positioned with respect to the cleaned pinhole H. From this state, the transfer head 49 is pressed against the pinhole H for a predetermined time as shown in FIG. Thereafter, by raising the transfer head 49, the alignment film repair agent 50 of the transfer head 49 is transferred over almost the entire area of the pinhole H as shown in FIG. At this time, the alignment film repair agent 50 is easily attached to the pinhole H by dry cleaning performed in advance.
- the film thickness of the repaired part 52 can also be controlled by adjusting the concentration of the alignment film repair agent 50.
- the transfer head 49 is accommodated in a container 51 shown in FIG.
- the transfer head 49 when the transfer head 49 is pressed against the pinhole H, the transfer head 49 is pressed against the alignment film 36 around the pinhole H. At this time, the transfer head 49 is elastically deformed along a step formed between the pinhole H and the alignment film 36, so that the transfer head 49 is brought into contact with the pinhole H and the alignment film 36 with almost no gap.
- a repair location 52 is formed up to the pinhole H and the alignment film 36 around it as shown in FIG. In this manner, the alignment film repair agent 50 may be laminated on the alignment film 36. After that, it is possible to remove only the alignment film repair agent 50 placed on the alignment film 36 and add a process of forming the repaired portion 52 flat.
- a pinhole H having a form as shown in FIG. 14 is formed on the alignment film 30 in the array substrate 19, and the base of the alignment film 30 exposed by the pinhole H (in FIG. 14, the pixel electrode 25 and the insulating layer 29) will be described.
- the transfer head 49 is positioned with respect to the pinhole H, and the transfer head 49 is pressed against the pinhole H for a predetermined time as shown in FIG. Rub.
- the transfer head 49 is made of a flexible porous material, the transfer head 49 is elastically deformed in accordance with the stepped shape of the base so that the transfer head 49 is in close contact with the pinhole H with almost no gap.
- the alignment film repair agent 50 is transferred over almost the entire area of the pinhole H as shown in FIG.
- the pressing time of the transfer head 49 and pressure * the alignment film depends on the concentration of the alignment film repair agent 50. It can be controlled to be equal to 30. If the size of the pinhole H is smaller than that of the transfer head 49, it can be repaired in the same manner as the alignment film 36 on the CF substrate 18 side.
- the thickness of the repaired portion 52 is not necessarily equal to the force that is most desirable to be equal to that of the alignment films 30 and 36. Even in such a case, it is desirable that the thickness of the repaired part 52 is 200 nm or less regardless of the thickness of the alignment films 30 and 36.
- the thickness of the alignment films 30, 36 and the repair location 52 affects the voltage value shared by the liquid crystal layer when a voltage is applied between the pixel electrode 25 and the counter electrode 34. For example, the thickness of the repair location 52 If the thickness is larger than 200 nm, the voltage shared by the liquid crystal layer with respect to the pixel having the repaired portion 52 is insufficient, and display failure may occur.
- the film thickness of the repair location 52 is set to 200 nm or less as in the present embodiment, a sufficient voltage can be applied to the liquid crystal layer, so that good display performance can be obtained.
- the thickness of the repaired portion 52 is 50 nm or more regardless of the thickness of the alignment films 30 and 36.
- the voltage assigned to the liquid crystal layer is prevented from becoming excessive when the voltage is applied as described above, and to sufficiently exert the alignment regulating force on the liquid crystal molecules, thereby enhancing the alignment stability of the liquid crystal molecules. Therefore, good display performance can be obtained. This is particularly effective when the vertical alignment type alignment films 30 and 36 having a large pretilt angle are used as in this embodiment.
- the liquid crystal panel 11 Is manufactured.
- the repaired part 52 having a film thickness equivalent to that of the alignment films 30 and 36 is formed in the pinhole H of the alignment films 30 and 36, good display performance can be obtained.
- the size and shape of the pinhole H and the position where the pinhole H is generated on the substrates 18 and 19 can be other than those shown.
- the alignment films 30 and 36 are inspected for the presence or absence of the pinhole H, the position of the pinhole H is detected, and then the alignment film is repaired in the pinhole H. Since the pinhole H is repaired by adhering the agent 50, the yield can be improved as compared with the case where the alignment film in which the pinhole is generated is formed again as in the prior art. Thereby, the manufacturing cost can be reduced.
- a stamp method is used in which the alignment film repair agent 50 is transferred to the pinhole H from the transfer head 49 to which the alignment film repair agent 50 is adhered. Therefore, in the repair process, for example, the alignment film Compared to the case where a droplet of a repair agent is dropped into a pinhole, the film thickness at the repair location 52 can be easily controlled.
- the alignment film repair agent 50 is transferred by pressing the transfer head 49 to which the alignment film repair agent 50 is attached to the pinhole H.
- the transfer head 49 By adjusting the time and pressure with which the head 49 is pressed, the thickness of the repaired part 52 can be easily controlled.
- repair is easier than when the alignment film repair agent is transferred by a transfer roller.
- the alignment film repairing agent 50 is prepared by dissolving an alignment film material in a solvent, and after repair, the transfer head 49 is immersed in the alignment film repairing agent 50 in the container 51 to stand by. Thus, after the repair, the alignment film repair agent 50 can be prevented from drying on the surface of the transfer head 49.
- the transfer head 49 having a flexible porous material force is used, the control of the film thickness at the repair location 52 becomes easier. Even if there is a step near the pinhole H, the alignment film repair agent 50 is surely obtained by the deformation of the flexible transfer head 49. Can be attached to the pinhole H.
- the excimer UV light (ultraviolet light) is irradiated to the pinhole H by the UV irradiation head 48, so that the surface modification can be suitably performed. Further, for example, the processing time can be shortened as compared with the case where the surface is modified by the wet method.
- the wavelength of light emitted from the UV irradiation head 48 is 146 ⁇ ! Since the thickness is set to ⁇ 365 nm, the surface modification can be suitably performed in a single layer.
- the alignment films 30 and 36 of the liquid crystal panel 11 have a function of aligning liquid crystal molecules substantially perpendicularly to the surfaces of the alignment films 30 and 36 in a state where no voltage is applied to the liquid crystal 20. Therefore, although the adhesion of alignment films 30, 36 to substrates 18 and 19 is low, pinholes H are likely to be formed during manufacturing, but repairing is performed by attaching alignment film repair agent 50 to pinholes H. Since the pinhole H can be repaired by forming the portion 52, the yield improvement effect is increasing.
- Ribs 35 and slits 31 for regulating the alignment state of the liquid crystal 20 are formed on the surfaces of the substrates 18 and 19 in the liquid crystal panel 11.
- the alignment films 30 and 36 extend along the ribs 35 and the slits 31.
- the laying area of the alignment films 30 and 36 on the substrates 18 and 19 tends to be large. Therefore, the pinhole H tends to be easily formed. Since the pinhole H can be repaired by forming the repaired part 52 by attaching the metal, the effect of improving the yield is high.
- the film thickness of the repair location 52 is controlled to be 50 nm to 200 nm, a good display quality can be obtained.
- a rotary encoder may be installed in the drive unit that drives the line sensor, and a pulse signal from the rotary encoder may be output to the defect detection circuit.
- a foreign matter removing unit may be provided in the inspection / repair device so that the work for removing the foreign matter can be automated when a foreign matter defect is found.
- the line sensor may be omitted, and for example, an operator may detect a pinhole with a microscope or the like. Further, inspection using a line sensor and inspection using a microscope may be used in combination.
- wet cleaning may be performed instead of dry cleaning.
- a UV irradiation head may be fixed, and the irradiated light may be reflected by a movable mirror to irradiate a desired pinhole.
- the wavelength of light emitted from the UV irradiation head may be any wavelength other than 146 nm to 365 nm (wavelength of 146 nm or less or wavelength of 365 nm or more). It is included in the present invention.
- an alignment film repair agent may be attached to the pinhole by a transfer roller instead of the transfer head.
- other types of alignment film materials such as TN mode, ECB mode, horizontal alignment mode, etc., are used for the liquid crystal panel using the vertical alignment type alignment film material.
- the present invention can also be applied to those.
- the force exemplified above for the liquid crystal panel provided with ribs and slits which is a structure for regulating the alignment state of the liquid crystal.
- the present invention is also applicable to a liquid crystal panel that is not installed.
- the present invention can be applied even if the alignment film has a film thickness other than 100 nm to 200 nm (thickness of 100 nm or less or 200 nm or more).
- the film thickness of the repaired portion may be a film thickness other than 50 nm to 200 nm (a film thickness of 50 nm or less or a film thickness of 200 nm or more), and such a film is also included in the present invention.
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07738203A EP2023185B1 (en) | 2006-05-16 | 2007-03-09 | Process for manufacturing display panel, display panel manufacturing apparatus and display panel |
| HK09106498.5A HK1128772B (en) | 2006-05-16 | 2007-03-09 | Process for manufacturing display panel and display panel manufacturing apparatus |
| JP2008515448A JP4260219B2 (ja) | 2006-05-16 | 2007-03-09 | 表示パネルの製造方法、表示パネルの製造装置、及び表示パネル |
| HK09106157.7A HK1127131B (en) | 2006-05-16 | 2007-03-09 | Process for manufacturing display panel, display panel manufacturing apparatus and display panel |
| CN2007800118035A CN101416099B (zh) | 2006-05-16 | 2007-03-09 | 显示面板的制造方法和显示面板的制造装置 |
| US12/234,086 US7880844B2 (en) | 2006-05-16 | 2008-09-19 | Display panel manufacturing method, display panel manufacturing apparatus, and display panel |
| US12/805,495 US8023097B2 (en) | 2006-05-16 | 2010-08-03 | Display panel manufacturing method, display panel manufacturing apparatus, and display panel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-136899 | 2006-05-16 | ||
| JP2006136899 | 2006-05-16 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/234,086 Continuation US7880844B2 (en) | 2006-05-16 | 2008-09-19 | Display panel manufacturing method, display panel manufacturing apparatus, and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007132586A1 true WO2007132586A1 (ja) | 2007-11-22 |
Family
ID=38693688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/054718 Ceased WO2007132586A1 (ja) | 2006-05-16 | 2007-03-09 | 表示パネルの製造方法、表示パネルの製造装置、及び表示パネル |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US7880844B2 (ja) |
| EP (1) | EP2023185B1 (ja) |
| JP (1) | JP4260219B2 (ja) |
| KR (2) | KR100949641B1 (ja) |
| CN (3) | CN101416099B (ja) |
| WO (1) | WO2007132586A1 (ja) |
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| WO2010140443A1 (ja) | 2009-06-04 | 2010-12-09 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| JP2011070161A (ja) * | 2009-08-28 | 2011-04-07 | Jsr Corp | 液晶配向剤、液晶配向膜、液晶表示素子、化合物及びこの化合物の製造方法 |
| WO2011125982A1 (ja) * | 2010-04-07 | 2011-10-13 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| WO2011125983A1 (ja) * | 2010-04-07 | 2011-10-13 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| CN101846819B (zh) * | 2009-03-27 | 2012-05-30 | 比亚迪股份有限公司 | 液晶显示器制造中丝印网痕的检测方法 |
| WO2012086158A1 (ja) * | 2010-12-21 | 2012-06-28 | シャープ株式会社 | 膜欠損修正方法及びそれを用いた液晶表示パネルの製造方法 |
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| CN102253506B (zh) * | 2010-05-21 | 2019-05-14 | 京东方科技集团股份有限公司 | 液晶显示基板的制造方法及检测修补设备 |
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| CN103524046A (zh) * | 2013-09-29 | 2014-01-22 | 南京中电熊猫液晶显示科技有限公司 | 一种配向膜在线修补设备及其在线修复方法 |
| KR20150109003A (ko) * | 2014-03-18 | 2015-10-01 | 삼성디스플레이 주식회사 | 액정 표시 장치 및 배향막 리페어 방법 |
| US10446728B2 (en) * | 2014-10-31 | 2019-10-15 | eLux, Inc. | Pick-and remove system and method for emissive display repair |
| US10410604B2 (en) * | 2015-09-03 | 2019-09-10 | Synthro Inc. | Systems and techniques for aggregation, display, and sharing of data |
| US11249348B2 (en) | 2017-09-08 | 2022-02-15 | Boe Technology Group Co., Ltd. | Needle for repairing alignment layer, alignment layer repairing apparatus, and method for repairing alignment layer |
| CN107577089A (zh) * | 2017-09-18 | 2018-01-12 | 惠科股份有限公司 | 一种显示面板的制程及制程装置 |
| US20190378768A1 (en) * | 2018-06-12 | 2019-12-12 | Sharp Kabushiki Kaisha | Display panel producing system and method of producing display panel |
| CN110034035B (zh) * | 2019-03-06 | 2021-06-15 | 重庆慧聚成江信息技术合伙企业(有限合伙) | 一种晶圆生产集质检与修复一体的光刻胶涂敷检测装置 |
| CN109976007A (zh) * | 2019-04-16 | 2019-07-05 | 合肥工业大学 | 一种取向膜修复装置及其修复方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846819B (zh) * | 2009-03-27 | 2012-05-30 | 比亚迪股份有限公司 | 液晶显示器制造中丝印网痕的检测方法 |
| WO2010140443A1 (ja) | 2009-06-04 | 2010-12-09 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| JP5328912B2 (ja) * | 2009-06-04 | 2013-10-30 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| US8773634B2 (en) | 2009-06-04 | 2014-07-08 | Sharp Kabushiki Kaisha | Method for producing liquid crystal panel, liquid crystal panel, and repair apparatus |
| JP2011070161A (ja) * | 2009-08-28 | 2011-04-07 | Jsr Corp | 液晶配向剤、液晶配向膜、液晶表示素子、化合物及びこの化合物の製造方法 |
| WO2011125982A1 (ja) * | 2010-04-07 | 2011-10-13 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| WO2011125983A1 (ja) * | 2010-04-07 | 2011-10-13 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| JP5619143B2 (ja) * | 2010-04-07 | 2014-11-05 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| JP5718902B2 (ja) * | 2010-04-07 | 2015-05-13 | シャープ株式会社 | 液晶パネルの製造方法、液晶パネルおよび修復装置 |
| WO2012086158A1 (ja) * | 2010-12-21 | 2012-06-28 | シャープ株式会社 | 膜欠損修正方法及びそれを用いた液晶表示パネルの製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US7880844B2 (en) | 2011-02-01 |
| US8023097B2 (en) | 2011-09-20 |
| KR20090130146A (ko) | 2009-12-17 |
| CN101806965A (zh) | 2010-08-18 |
| KR20080103530A (ko) | 2008-11-27 |
| CN101416099A (zh) | 2009-04-22 |
| HK1127131A1 (en) | 2009-09-18 |
| EP2023185B1 (en) | 2012-08-15 |
| EP2023185A4 (en) | 2011-06-15 |
| CN101916018A (zh) | 2010-12-15 |
| HK1128772A1 (en) | 2009-11-06 |
| US20100294417A1 (en) | 2010-11-25 |
| US20090021680A1 (en) | 2009-01-22 |
| JP4260219B2 (ja) | 2009-04-30 |
| JPWO2007132586A1 (ja) | 2009-09-24 |
| EP2023185A1 (en) | 2009-02-11 |
| CN101416099B (zh) | 2010-09-29 |
| KR100948734B1 (ko) | 2010-03-22 |
| KR100949641B1 (ko) | 2010-03-26 |
| CN101916018B (zh) | 2013-03-27 |
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