WO2008035421A1 - Panneau d'affichage à cristaux liquides et procédé de production de ce panneau - Google Patents

Panneau d'affichage à cristaux liquides et procédé de production de ce panneau Download PDF

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Publication number
WO2008035421A1
WO2008035421A1 PCT/JP2006/318716 JP2006318716W WO2008035421A1 WO 2008035421 A1 WO2008035421 A1 WO 2008035421A1 JP 2006318716 W JP2006318716 W JP 2006318716W WO 2008035421 A1 WO2008035421 A1 WO 2008035421A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
substrate
crystal display
display panel
slit
Prior art date
Application number
PCT/JP2006/318716
Other languages
English (en)
Japanese (ja)
Inventor
Yoshihisa Kurosaki
Junji Tomita
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Priority to JP2008535239A priority Critical patent/JP5131196B2/ja
Priority to PCT/JP2006/318716 priority patent/WO2008035421A1/fr
Publication of WO2008035421A1 publication Critical patent/WO2008035421A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1341—Filling or closing of cells
    • 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
    • G02F1/133351—Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of 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
    • G02F1/133—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

Definitions

  • Liquid crystal display panel and manufacturing method thereof Liquid crystal display panel and manufacturing method thereof
  • the present invention relates to a liquid crystal display panel in which liquid crystal is sealed between a pair of opposing substrates, and a method for manufacturing the same.
  • liquid crystal display elements using liquid crystals have deeply penetrated into daily life.
  • TN Transmission Nematic
  • STN Super Twisted Nematic
  • TSTN Triple Super Twisted Nematic
  • the liquid crystal display element has a pair of substrates each provided with an electrode and a liquid crystal sealed between the pair of substrates.
  • a glass substrate As a substrate, a glass substrate is generally used.
  • a liquid crystal display element using a film substrate (plastic substrate) formed of a transparent special resin can be realized.
  • a liquid crystal display element using a plastic substrate can be made thinner and lighter than a liquid crystal display element using a glass substrate, and has sufficient flexibility, so it has high durability. High strength against bending! /.
  • a liquid crystal display element is manufactured by bonding a pair of substrates each having an electrode, injecting liquid crystal between the pair of substrates to produce a liquid crystal display panel, and processing the liquid crystal display panel. Is done.
  • a sealing agent is applied to one substrate, the other substrate is opposed to one substrate, both substrates are pressurized from both sides, and the sealing agent is cured.
  • the pair of substrates is pressurized by physical pressing from both sides, sealing in a vacuum pack, or the like.
  • Patent Document 1 Japanese Patent No. 3077404
  • Patent Document 2 Japanese Patent Laid-Open No. 2002-287157
  • Patent Document 3 Japanese Patent No. 2511341
  • Patent Document 4 Japanese Patent Laid-Open No. 05-265014
  • Patent Document 5 Japanese Patent Application Laid-Open No. 07-318957
  • Patent Document 6 Japanese Patent Laid-Open No. 08-201747
  • An object of the present invention is to provide a liquid crystal display panel that can be mass-produced with a high production yield and that can provide high display quality, and a method for manufacturing the same.
  • the object is to form a first terminal portion for each of a plurality of panel regions on the first substrate, and to form a first on a portion facing the first terminal portion of the second substrate bonded to the first substrate.
  • Forming a slit forming an opening in a region other than the plurality of panel regions of the first or second substrate, and surrounding the first slit or the portion facing the first slit without a break;
  • a second seal part that seamlessly surrounds the opening or a portion that faces the opening and the plurality of panel regions, and a third seal part that surrounds the outer periphery of each of the plurality of panel regions.
  • the first substrate and the second substrate are opposed via the first to third seal portions so that the first terminal portion and the first slit are opposed to each other. And reducing the pressure between the first and second substrates through the opening.
  • the first and second substrates are bonded together, liquid crystal is injected into each panel region between the first and second substrates and sealed, and the first and second substrates are divided into each panel region. thing This is achieved by a method for manufacturing a liquid crystal display panel.
  • the object is to form first and second substrates opposed to each other, liquid crystal sealed between the first and second substrates, and an outer peripheral portion between the first and second substrates.
  • a liquid crystal display panel comprising: a seal portion that seals the liquid crystal; and a first projecting seal portion that branches from the seal portion and projects to the substrate end surfaces of the first and second substrates.
  • liquid crystal display panel that can be mass-produced at a high production yield and has a high display quality.
  • FIG. 1 is a flowchart showing a manufacturing process of a liquid crystal display panel 1 according to a first embodiment of the present invention.
  • FIG. 2 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 2).
  • FIG. 3 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 3)
  • FIG. 4 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 2)
  • FIG. 5 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 1)
  • FIG. 6 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 1)
  • FIG. 7 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 1)
  • FIG. 8 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 1)
  • FIG. 9 shows a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the present invention (part 1)
  • FIG. 10 is a diagram (No. 9) showing a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the invention.
  • FIG. 11 is a diagram (No. 10) showing a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the invention.
  • FIG. 12 is a view (No. 11) showing a manufacturing step of the liquid crystal display panel 1 according to the first embodiment of the invention.
  • FIG. 13 is a view (No. 12) showing a manufacturing process of the liquid crystal display panel 1 according to the first embodiment of the invention.
  • FIG. 14 is a diagram showing a liquid crystal display panel 1 according to the first embodiment of the present invention.
  • FIG. 15 is a diagram showing manufacturing steps of the liquid crystal display panel 101 according to the second embodiment of the present invention.
  • FIG. 16 is a diagram showing a liquid crystal display panel 101 according to a second embodiment of the present invention. Explanation of symbols
  • a liquid crystal display panel and a manufacturing method thereof according to the first embodiment of the present invention will be described with reference to FIGS.
  • a manufacturing method of a liquid crystal display panel which is a premise of the present embodiment will be described.
  • the following technologies are proposed.
  • an opening is formed in one or both of the pair of substrates before the substrate bonding step.
  • the opening is formed outside a region (panel region) to be a liquid crystal display panel.
  • a sealant is applied to one substrate, and a seal portion surrounding the panel region and the opening is formed on the one substrate.
  • the pair of substrates are opposed to each other through the seal portion, and the two substrates are aligned.
  • the substrates are sealed.
  • the pressure between the pair of substrates is reduced through the opening, for example, by vacuum suction.
  • firing a pair of substrates thus, the bonding of the substrates is completed.
  • the liquid crystal display panel has electrode terminal portions on one or both substrates.
  • As one method of exposing the terminal portion there is a method of cutting and removing a portion of the substrate facing the terminal portion after bonding a pair of substrates.
  • Patent Document 1 discloses a method for manufacturing a liquid crystal display device that solves the above-described problems.
  • a slit is formed in a portion facing the terminal portion of the substrate facing the terminal portion.
  • FIG. 1 is a flowchart showing the manufacturing process of the liquid crystal display panel according to the present embodiment.
  • 2 to 13 are views showing a manufacturing process of the liquid crystal display panel according to the present embodiment.
  • a multi-sided substrate (first substrate) 12 ′ having a plurality of panel regions 14 is prepared.
  • the substrate 12 ′ for example, a plastic substrate such as a polycarbonate (PC) film substrate or a polyethylene terephthalate (PET) film substrate, or a glass substrate is used.
  • the substrate 12 ′ has a rectangular planar shape.
  • the thickness of the substrate 12 ′ is, for example, 0.2 mm.
  • the plurality of panel regions 14 are arranged in a matrix of 3 rows in the long side direction (left and right direction in FIG.
  • Each panel region 14 has, for example, a rectangular shape having a long side of 100 mm and a short side of 8 Omm.
  • the short side direction of the substrate 12 ′ and the long side direction of the panel region 14 are the same direction, and the long side direction of the substrate 12 ′ and the short side direction of the panel region 14 are the same direction.
  • a plurality of scan electrodes 17 are formed for each of the plurality of panel regions 14 on the substrate 12 ′ (step Sl (a) in FIG. 1; patterning step). Thereby, the lower substrate 12 is manufactured.
  • the plurality of scanning electrodes 17 in the same panel region 14 extend in the long side direction of the panel region 14 in parallel with each other.
  • the scanning electrode 17 is formed in a strip shape.
  • the scan electrode 17 is made of, for example, indium tin oxide (ITO).
  • One end portion (upper end portion in FIG. 2) of each scanning electrode 17 becomes a first electrode terminal 17a.
  • a plurality of first electrode terminals 17a in the same panel region 14 constitute a first terminal portion 61 (enclosed by a rectangular frame in FIG. 2). Accordingly, each of the plurality of panel regions 14 has one first terminal portion 61.
  • a predetermined gap is formed between adjacent panel regions 14.
  • a second slit 67 is formed for each of the plurality of panel regions 14 of the lower substrate 12.
  • the second slit 67 is formed in a portion facing the terminal portion (second terminal portion) on the upper substrate side when the lower substrate 12 and an upper substrate described later are bonded together. Moreover, you may also form the outer periphery of the said part.
  • the second slit 67 extends in the long side direction of the panel region 14.
  • the plurality of second slits 67 are formed at a time, for example, by punching.
  • three second slits 67 of three panel regions 14 belonging to the same row are formed separately from each other, and slits are also formed between the second slits 67 adjacent to each other in the force train direction.
  • the three second slits 67 may be formed as one integral second slit 67.
  • one second slit 67 faces the three second terminal portions on the upper substrate side when the lower substrate 12 and the upper substrate are bonded.
  • an internal film such as an alignment film (not shown) for controlling the alignment of liquid crystal molecules is formed on the lower substrate 12 as needed (step S3 (a) in FIG. 1; internal film) Forming step).
  • the first to fourth seal portions 71, 73, 75, 77 may be formed by screen printing a sealing agent on the lower substrate 12.
  • the sealant epoxy thermosetting resin, acrylic ultraviolet curable resin, or the like is used.
  • the first, third, and fourth seal portions 71, 75, and 77 are integrally formed for each of the plurality of panel regions 14.
  • the first seal portion 71 surrounds the first terminal portion 61 and its periphery without a break.
  • the second seal portion 73 is formed on the outer peripheral portion of the lower substrate 12 and has a rectangular frame shape. The second seal portion 73 surrounds the plurality of panel regions 14 without a break.
  • the third seal portion 75 surrounds each outer peripheral portion of the plurality of panel regions 14 and surrounds the plurality of scan electrodes 17 except for the first terminal portion 61.
  • a portion surrounded by the third seal portion 75 is a display portion of the liquid crystal display panel 1.
  • the third seal portion 75 has an injection port 75a for injecting liquid crystal.
  • the first seal portion 71 and the third seal portion 75 partially overlap and are arranged adjacent to each other in the vertical direction in FIG.
  • the fourth seal portion 77 surrounds the second slit 67 without a break.
  • the third seal portion 75 and the fourth seal portion 77 partially overlap and are arranged adjacent to each other on the left and right in FIG.
  • a multi-sided substrate (second substrate) 10 ′ having a plurality of panel regions 14 similar to the panel region 14 on the lower substrate 12 side is prepared.
  • the substrate 10 ′ is formed of the same material as the substrate 12 ′, for example, and has substantially the same shape, size, and thickness as the substrate 12 ′.
  • a plurality of data electrodes 19 are formed for each of a plurality of panel regions 14 on the substrate 10 ′ (in FIG. 1, step Sl (b); patterning step).
  • the upper substrate 10 is formed.
  • the plurality of data electrodes 19 in the same panel region 14 extend in the short side direction of the panel region 14 in parallel with each other.
  • the data electrode 19 is formed in a strip shape.
  • the data electrode 19 is made of, for example, ITO.
  • One end of each data electrode 19 (the left end in FIG. 5) serves as the second electrode terminal 19a.
  • a plurality of second electrode terminals 19a in the same panel region 14 constitute a second terminal portion 63. Accordingly, each of the plurality of panel regions 14 has one second terminal portion 63.
  • a predetermined gap is formed between adjacent panel regions 14.
  • the first slit 65 is formed for each of the plurality of panel regions 14 of the upper substrate 10 (in FIG. 1, step S2 (b); slit forming step).
  • the first slit 65 is formed in a portion facing the first terminal portion 61 when the upper substrate 10 and the lower substrate 12 are bonded together. Moreover, you may also form the outer periphery of the said part.
  • the first slit 65 extends in the short side direction of the panel region 14.
  • the plurality of first slits 65 are formed at once, for example, by punching.
  • first slits 65 in five panel regions 14 belonging to the same row are formed separately from each other, and slits are also formed between first slits 65 adjacent in the power running direction. Then, the five first slits 65 may be formed as one integral first slit 65. When the first slits 65 are formed in this way, one first slit 65 faces the five first terminal portions 61 when the upper substrate 10 and the lower substrate 12 are bonded together.
  • An opening 13 is formed at the center lower portion in FIG.
  • the opening 13 is formed in a region surrounded by the second seal portion 73 without a break when the upper substrate 10 and the lower substrate 12 are bonded together.
  • the opening 13 has a circular shape with a diameter of 4 mm, for example.
  • the opening 13 may be formed at a different location on the upper substrate 10 as long as it is an area other than the plurality of panel areas 14. Further, the opening 13 may be formed in the lower substrate 12 instead of the upper substrate 10.
  • an inner film such as an alignment film (not shown) for controlling the alignment of liquid crystal molecules is formed on the upper substrate 10 as necessary (step S3 (b) in FIG. 1; inner film formation). Process).
  • a spacer is sprayed on the upper substrate 10 (in FIG. 1, step S4 (b); spacer spraying step).
  • the spacer is sprayed to keep the distance (cell gap) between the upper and lower substrates 10 and 12 uniform.
  • the spacer has, for example, a spherical shape of 5. ⁇ ⁇ ⁇ .
  • the process of forming the first and second slits 65 and 67 is performed at an arbitrary stage before the substrate alignment process (step S5 in FIG. 1). Can do.
  • the first and second slits 65 and 67 may be formed before the scan electrode 17 and the data electrode 19 are formed (steps S I (a) and SI (b)).
  • the first and second slits 65 and 67 may be formed after the inner film formation (steps S3 (a) and S3 (b)).
  • the first and second seal portions 71, 73, 75, 77 may be formed by applying a sealant (step S4 (a)), and then the first and second slits 65, 67 may be formed. .
  • the sealing agent application (step S4 (a)) and the spacer spraying (step S4 (b)) may be performed on either the upper substrate 10 or the lower substrate 12.
  • a spacer may be spread on the lower substrate 12 instead of the upper substrate 10.
  • the first to fourth seal portions 71, 73, 75, 77 may be formed on the upper substrate 10 instead of on the lower substrate 12.
  • the first seal portion 71 surrounds the first slit 65 without a break.
  • the fourth seal portion 77 is a portion (the second terminal portion 63 and the portion facing the second slit 67) when the upper substrate 10 and the lower substrate 12 are bonded together. Surround the surrounding area).
  • FIG. 7 is a plan view illustrating the combined substrate 20 and the upper substrate 10 side force.
  • the upper substrate 10 is arranged on the front side
  • the lower substrate 12 is arranged on the back side.
  • hidden lines are indicated by broken lines.
  • the first terminal portion 61 and the first slit 65 are opposed to each other in the plurality of panel regions 14, and the second terminal portion 63 and the second Make sure that the slit 67 faces each other.
  • the first slit 65 faces all of the plurality of first electrode terminals 17a.
  • the second slit 67 faces all of the plurality of second electrode terminals 19a.
  • the scanning electrode 17 excluding the first terminal portion 61 exposed through the first slit 65 and the data electrode excluding the second terminal portion 63 exposed through the second slit 67 are shown. Illustration of 19 is omitted.
  • the first seal portion 71 surrounds the first slit 65 without break, and the fourth seal portion 77 surrounds the second slit 67 without break.
  • the second seal portion 73 seamlessly surrounds the plurality of panel regions 14 and the opening 13. In the state in which the laminated substrate 20 is manufactured, the upper substrate 10 is merely positioned and temporarily placed on the lower substrate 12, and the upper substrate 10 and the lower substrate 12 are not completely bonded and fixed.
  • thermosetting resin used as the sealant
  • the entire laminated substrate 20 is heated using a thermostatic bath (not shown), and an ultraviolet curable resin is used as the sealant.
  • the entire laminated substrate 20 is irradiated with ultraviolet rays from the outside to harden the first to fourth seal portions 71, 73, 75, 77 (in FIG. 1, step S6; Hard key process).
  • FIG. 8 (a) the upper substrate 10 is turned up and the end portion of the laminated substrate 20 where the opening 13 is formed is placed on the holding plate 22.
  • FIG. 8 (b) the end portion of the laminated substrate 20 where the opening 13 is formed is sandwiched between two holding plates 22 and 24.
  • FIG. 8B shows a state in which the end portion of the laminated substrate 20 is sandwiched between the two holding plates 22 and 24.
  • the holding plate 24 is provided with a tube 24a for vacuum suction.
  • the tube 24a is connected to a vacuum pump (not shown).
  • Silicone rubbers 23 and 25 are provided on the outer peripheral portions of the surfaces of the holding plates 22 and 24 facing each other.
  • FIG. 9 is a plan view illustrating the laminated substrate 20 during vacuum suction from the upper substrate 10 side.
  • the flow of air between the upper and lower substrates 10 and 12 during vacuum suction is schematically shown by white arrows.
  • the holding plates 22 and 24 are not shown.
  • FIG. 10 shows a cross section taken along line AA in FIG. In Fig. 10, the air flow during vacuum suction is shown schematically with relatively small white arrows.
  • the upper and lower substrates 10 and 12 face each other at a predetermined interval (cell gap) via the first to fourth seal portions 71, 73, 75, 77 and the spacer 16. is doing.
  • the upper and lower substrates 10 and 12 are surrounded by the second seal portion 73 without a break.
  • the first slit 65 is surrounded by the first seal portion 71 without a break.
  • the second slit 67 is surrounded by the fourth seal portion 77 without any breaks.
  • the sealed state between the upper and lower substrates 10 and 12 is obtained by vacuum suction through the space between the holding plates 22 and 24 and the opening 13.
  • the part (in Fig. 10, space 81) is decompressed.
  • both surfaces of the laminated substrate 20 are pressurized by atmospheric pressure, and the upper and lower substrates 10 and 12 are bonded and fixed.
  • the laminated substrate 20 is fired.
  • the upper and lower substrates 10 and 12 are uniformly pressurized by atmospheric pressure. Therefore, problems such as cell gap non-uniformity and damage to the upper and lower substrates 10 and 12 are not caused. Therefore, the upper and lower substrates 10 and 12 can be bonded and fixed satisfactorily.
  • FIG. 12 shows the three laminated substrates 20 after cutting. As shown in FIG. 12, each laminated substrate 20 after cutting has five panel regions 14. The inlet 75a of each panel region 14 is exposed at the end face of the laminated substrate 20.
  • liquid crystal injection process for each panel region 14, liquid crystal is injected between the upper and lower substrates 10 and 12 surrounded by the third seal portion 75 by, for example, a dip vacuum injection method (in FIG. 1, step S 9; liquid crystal injection) D)
  • a dip vacuum injection method in FIG. 1, step S 9; liquid crystal injection
  • D liquid crystal injection
  • the alignment substrate 20 is placed in a vacuum chamber (not shown).
  • the vacuum chamber is depressurized to make a vacuum.
  • vacuum check While maintaining the inside of the chamber in a vacuum
  • the inlet 75a of the alignment substrate 20 is immersed in the liquid crystal.
  • release the vacuum in the vacuum chamber As a result, liquid crystal is injected between the upper and lower substrates 10 and 12.
  • FIG. 1 dip vacuum injection method
  • a sealing agent 79 is formed at the inlet 75a, and the inlet 75a is sealed with the sealing agent 79 (step S9 in FIG. 1; liquid crystal sealing step).
  • the liquid crystal injected between the upper and lower substrates 10 and 12 surrounded by the third seal portion 75 is sealed between the upper and lower substrates 10 and 12.
  • FIG. 13 shows the positions of the cutting lines L2, L3, and L4.
  • the cutting line L2 is parallel to the long side direction of the laminated substrate 20, overlaps with the first slits 65 of the plurality of panel regions 14 when viewed in the normal direction of the substrate surface of the laminated substrate 20, and does not overlap with the first terminal portion 61. It is a straight line.
  • the cutting lines L3 and L4 are provided for each panel region 14 (not shown in FIG. 13) and are straight lines parallel to the short side direction of the laminated substrate 20.
  • Each cutting line L3 is a straight line passing through the vicinity of the left side of the third seal portion 75 in FIG.
  • Each cutting line L4 is a straight line that overlaps the second slit 67 and does not overlap the second terminal portion 63 when viewed in the normal direction of the substrate surface of the laminated substrate 20.
  • first slit 65 is surrounded by first seal portion 71 without a break
  • second slit 67 is surrounded by the fourth seal portion 77 without any breaks. Therefore, by sandwiching the end portions of the upper and lower substrates 10 and 12 where the openings 13 are formed between the holding plates 22 and 24, the first seal is provided between the upper and lower substrates 10 and 12 surrounded by the second seal portion 73. Except for the portion surrounded by the portion 71 or the fourth seal portion 77, the holding plates 22, 24 and the first, second and fourth seal portions 71, 73, 77 are sealed.
  • the display quality and the manufacturing yield of the liquid crystal display panel can be improved even when multi-paneling is performed.
  • the holding plates 22 and 24 can be reduced in size. Therefore, the liquid crystal display panel 1 can be manufactured at a low cost. Further, since the second seal portion 73 is formed on the outer peripheral portion of the lower substrate 12, a large number of panel regions 14 can be formed in the upper and lower substrates 10 and 12. Therefore, the liquid crystal display panel 1 can be manufactured at a low cost. Further, since the first slit 65 faces all of the plurality of first electrode terminals 17a and exposes all of the first electrode terminals 17a, the connection between the first electrode terminal 17a and the outside becomes easy. Similarly, since the second slit 67 faces all of the plurality of second electrode terminals 19a and exposes all of the second electrode terminals 19a, the connection between the second electrode terminal 19a and the outside becomes easy.
  • FIG. 14 is a plan view illustrating the liquid crystal display panel 1 manufactured by the method of manufacturing the liquid crystal display panel 1 according to the present embodiment from the upper substrate 10 side.
  • the liquid crystal display panel 1 has an upper substrate (second substrate) 10 and a lower substrate (first substrate) 12 arranged to face each other.
  • a third seal portion (seal portion) 75 is formed on the outer peripheral portion between the upper and lower substrates 10 and 12.
  • the third seal portion 75 has an injection port 75a for injecting liquid crystal.
  • the injection port 75a is sealed with a sealant 79.
  • a liquid crystal (not shown) is sealed between the upper and lower substrates 10 and 12 surrounded by the third seal portion 75 and the sealant 79.
  • a plurality of scanning electrodes 17 are formed on the lower substrate 12.
  • a first terminal 61 is formed at one end of the plurality of scanning electrodes 17 and outside the third seal portion 75 (upper side in FIG. 14).
  • a cut portion (first cut portion) 65a is formed in the portion of the upper substrate 10 facing the first terminal portion 61.
  • the cut portion 65a is a part (or all) of the first slit 65 formed in the slit forming step.
  • the cut portion 65a exposes the first terminal portion 61.
  • a plurality of data electrodes 19 are formed on the upper substrate 10.
  • a second terminal portion 63 is formed at one end of the plurality of data electrodes 19 and outside the third seal portion 75 (right side in FIG. 14).
  • a notch (second notch) 67a is formed in the portion of the lower substrate 12 facing the second terminal portion 63.
  • the cut portion 67a is a part (or all) of the second slit 67 formed in the slit forming step.
  • the cut portion 67a exposes the second terminal portion 63.
  • the liquid crystal display panel 1 includes a first projecting seal portion 71a and a second projecting seal portion 77a that are branched from the third seal portion 75 and project to the substrate end surfaces of the upper and lower substrates 10 and 12. It has a feature in that it has.
  • the first projecting seal portion 71a is a part of the first seal portion 71 formed in the sealant application process.
  • the first protruding seal portion 71a is formed such that two corners on the upper side in FIG. 14 of the third seal portion 75 also protrude toward the first terminal portion 61 side.
  • the second projecting seal portion 77a is a part of the fourth seal portion 77 formed in the sealant application process.
  • the second projecting seal portion 77a is formed to project from the two corners on the right side in FIG. 14 to the second terminal portion 63 side.
  • the upper substrate 10 has the protruding portion 10a protruding to the first terminal portion 61 side at the two corners on the upper side in FIG. 14 is also characterized in that the lower substrate 12 is provided with a protruding portion 12a protruding to the second terminal portion 63 side at two corners on the right side in FIG.
  • the protruding portion 10a is formed in the vicinity of the first protruding seal portion 71a.
  • the protruding portion 12a is formed in the vicinity of the second protruding seal portion 77a.
  • a conventional liquid crystal display panel using plastic substrates as the upper and lower substrates 10 and 12 can be reduced in thickness and weight, and can be bent with sufficient flexibility. There is a problem that corners are easily peeled off.
  • the first and second projecting seal portions 71a and 77a and the projecting portions 10a and 12a are formed in the vicinity of the corner portion of the third seal portion 75. Is reinforced. Therefore, the corner portion of the third seal portion 75 is peeled. Accordingly, it is possible to realize a liquid crystal display panel 1 that can be reduced in thickness and weight, has sufficient flexibility, and has high strength. For this reason, the liquid crystal display panel 1 according to the present embodiment is suitable as a display element for electronic paper that is thin, lightweight, and requires high flexibility.
  • a liquid crystal display panel according to a second embodiment of the present invention and a method for manufacturing the same will be described with reference to FIGS.
  • the manufacturing method will be described with reference to FIGS.
  • the manufacturing method of the liquid crystal display panel according to the present embodiment is the same as the manufacturing method of the liquid crystal display panel 1 according to the first embodiment, except for the sealing agent application step (step S4 (a) in FIG. 1). .
  • steps S4 (a) in FIG. 1). the sealing agent application step.
  • components having the same functions and operations as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 15 is a plan view illustrating the aligned substrate 20 at the end of the substrate alignment step (step S 5 in FIG. 1) from the upper substrate 10 side.
  • the liquid crystal display panel manufacturing method according to the present embodiment is different from the liquid crystal display panel 1 manufacturing method according to the first embodiment in that the first and second slits in the same panel region 14 are the same. It is characterized in that the first seal portion 71 is formed so as to surround the 65 and 67 without a break. Accordingly, the first and second slits 65 and 67 in the same panel region 14 are surrounded by one first seal portion 71 without any break.
  • the scan electrode 17 and the first terminal portion 61 are formed for each of the plurality of panel regions 14 on the substrate 12 ′ by a manufacturing method similar to the manufacturing method of the liquid crystal display panel 1 according to the first embodiment.
  • the substrate 12 is manufactured, the second slit 67 is formed for each of the plurality of panel regions 14 of the lower substrate 12, and an internal film is formed on the lower substrate 12 (in FIG. 1, steps SI (a) to S3 (a) ).
  • the second slit 67 is formed in a portion facing the second terminal portion 63 when the upper substrate 10 and the lower substrate 12 are bonded together.
  • a sealant is applied onto the lower substrate 12 to form first to third seal portions 71, 73, 75 on the lower substrate 12 (in FIG. 1, step S4 (a); seal Agent coating process).
  • the first seal portion 71 surrounds the portion facing the first slit 65 (the first terminal portion 61 and its surroundings) and the second slit 67 when the upper substrate 10 and the lower substrate 12 are bonded together.
  • the shapes of the second and third seal portions are the same as those in the manufacturing method of the liquid crystal display panel 1 according to the first embodiment.
  • fourth seal portion 77 is not formed.
  • the data electrode 19 and the second terminal portion 63 are provided for each of the plurality of panel regions 14 on the substrate 10 ′ by a manufacturing method similar to the manufacturing method of the liquid crystal display panel 1 according to the first embodiment.
  • the upper substrate 10 is formed to form a first slit 65 for each of the plurality of panel regions 14 of the upper substrate 10.
  • an inner film and a spacer are formed on the upper substrate 10 (steps Sl (b) to S4 (b) in FIG. 1).
  • the first slit 65 is formed in a portion facing the first terminal portion 61 when the upper substrate 10 and the lower substrate 12 are bonded together.
  • step S5 to S11 in FIG. 1 The manufacturing process of the liquid crystal display panel using the upper and lower substrates 10 and 12 (steps S5 to S11 in FIG. 1) is the same as the manufacturing method of the liquid crystal display panel 1 according to the first embodiment, and thus the description thereof is omitted. To do. As a result, a plurality (15 in this embodiment) of liquid crystal display panels 101 each having the first and second terminal portions 61 and 63 are completed (step SI 1 in FIG. 1; single panel completed). Thereafter, peripheral circuits and the like are provided to complete the liquid crystal display element.
  • first and second slits 65 and 67 in the same panel region 14 are surrounded by one first seal portion 71 without a break. Therefore, by sandwiching the ends where the openings 13 of the upper and lower substrates 10 and 12 are formed between the holding plates 22 and 24, the first seal portion is provided between the upper and lower substrates 10 and 12 surrounded by the second seal portion 73. Except for the portion surrounded by 71, the holding plates 22 and 24 and the first and second seal portions 71 and 73 are hermetically sealed. Therefore, it is possible to realize a manufacturing method that combines multiple chamfering and pasting by decompression. Therefore, the display quality and manufacturing yield of the liquid crystal display panel can be improved by the liquid crystal display panel manufacturing method according to the present embodiment, even if multiple layouts are performed.
  • first and second slits 65 and 67 in the same panel region 14 are surrounded by one first seal portion 71 without a break.
  • the formation of the fourth seal portion 77 is not necessary, and the shape of the seal portion can be simplified. Therefore, the liquid crystal display panel 101 can be manufactured at low cost.
  • FIG. 16 is a plan view illustrating the liquid crystal display panel 101 manufactured by the method of manufacturing the liquid crystal display panel 101 according to the present embodiment from the upper substrate 10 side.
  • the liquid crystal display panel 101 according to the present embodiment is different from the liquid crystal display panel 1 in that first and second projecting seal portions 71b and 71c are formed instead of the first and second projecting seal portions 71a and 77a. It has a feature in that.
  • the first and second projecting seal portions 71b and 71c are formed so as to branch from the third seal portion 75 and project to the substrate end surfaces of the upper and lower substrates 10 and 12.
  • First and second protruding seals 71b, 71c Is a part of the first seal portion 71 formed in the sealant application step.
  • the first protruding seal portion 71b is formed so that the force in the vicinity of the upper left corner in FIG. 14 of the third seal portion 75 also protrudes to the left side of the liquid crystal display panel 101.
  • the second projecting seal portion 71c is formed so as to project toward the second terminal portion 63 side of the third seal portion 75 at the lower right corner portion in FIG.
  • the configuration of the liquid crystal display panel 101 excluding the first and second projecting seal portions 71b and 71c is the same as that of the liquid crystal display panel 1 according to the first embodiment.
  • the liquid crystal display panel 101 according to the present embodiment can obtain the same effects as the liquid crystal display panel 1 according to the first embodiment.
  • a noisy matrix liquid crystal display panel and a manufacturing method thereof have been described as examples.
  • the present invention can also be applied to an active matrix type liquid crystal display panel provided with the above switching elements and a method for manufacturing the same.
  • the scanning electrode 17 and the data electrode 19 are formed on the same substrate (for example, the lower substrate 12), and the common electrode is formed on the other substrate (for example, the upper substrate 10).
  • the first and second terminal portions 61 and 63 are formed on the same substrate.
  • the manufacturing method of the active matrix type liquid crystal display panel to which the manufacturing method of the liquid crystal display panel 1 according to the first embodiment is applied differs from the manufacturing method of the liquid crystal display panel 1 in the following points.
  • the gate bus line and the first terminal portion 61 at one end thereof are formed for each of the plurality of panel regions 14 on the lower substrate 12.
  • a drain bus line that intersects the gate bus line via an insulating film and a second terminal portion 63 at one end thereof are formed.
  • a switching element and a pixel electrode are formed at each intersection of both bus lines.
  • a second slit 67 is formed for each of the plurality of panel regions 14 of the upper substrate 10.
  • the second slit 67 is formed in a portion facing the second terminal portion 63 when the upper substrate 10 and the lower substrate 12 are bonded together.
  • the fourth seal portion 77 is placed on the lower substrate so as to surround the portion facing the second slit 67 (the second terminal portion 63 and its peripheral portion) without a break.
  • a common electrode is formed for each panel area 14 on the upper substrate 10. To do. The common electrode is formed on almost the entire surface of each panel region 14.
  • the data electrode 19 and the second terminal portion 63 are formed on the lower substrate 12 with respect to the liquid crystal display panel 1, and a notch (second The difference is that the cut portion 67a is formed in the upper substrate 10. Further, the data electrode 19 faces the scanning electrode 17 through an insulating film. An area defined by the scanning electrode 17 and the data electrode 19 is one pixel. On the lower substrate 12, a switching element and a pixel electrode are formed for each pixel. A common electrode is formed on the upper substrate 10.
  • the manufacturing method of the active matrix type liquid crystal display panel to which the manufacturing method of the liquid crystal display panel 101 according to the second embodiment is applied differs from the manufacturing method of the liquid crystal display panel 101 in the following points.
  • a gate bus line and a first terminal portion 61 at one end thereof are formed for each of a plurality of panel regions 14 on the lower substrate 12.
  • a drain bus line intersecting with the gate bus line via an insulating film and a second terminal portion 63 at one end thereof are formed.
  • a switching element and a pixel electrode are formed at each intersection of both bus lines.
  • a second slit 67 is formed for each of the plurality of panel regions 14 of the upper substrate 10.
  • the second slit 67 is formed in a portion facing the second terminal portion 63 when the upper substrate 10 and the lower substrate 12 are bonded together.
  • the portions facing the first and second slits 65 and 67 are surrounded without a break.
  • the first seal portion 71 is formed on the lower substrate 12.
  • a common electrode is formed for each panel region 14 on the upper substrate 10. The common electrode is formed on almost the entire surface of each panel region 14.
  • the bonding method using reduced pressure (step S7 in FIG. 1) is not limited to the method described in the above embodiment.
  • PCTZJP2006Z304343 by the applicant of the present application, another method is proposed. The method will be briefly described. In this method, instead of forming the opening 13, a through-hole penetrating the upper and lower substrates 10 and 12 is formed in, for example, an end portion of the laminated substrate 20 after the upper and lower substrates 10 and 12 are bonded. Before bonding the upper and lower substrates 10 and 12, the opening 13 is formed at the same position of the upper and lower substrates 10 and 12, and the upper and lower substrates 13 and 12 are aligned with each other.
  • the substrates 10 and 12 may be aligned to form a through hole.
  • the plurality of laminated substrates 20 are arranged so that the through holes of the respective laminated substrates 20 overlap each other when viewed in the normal direction of the substrate surface of the laminated substrate 20.
  • pipes having openings formed on the side surfaces are inserted into the plurality of through holes.
  • one end of the pipe is closed, and the inside of the plurality of laminated substrates 20 is vacuum-sucked from the other end of the noise through the opening of the pipe and the plurality of through holes.
  • the pressure inside the plurality of laminated substrates 20 is reduced simultaneously. According to this method, the inside of the plurality of laminated substrates 20 can be depressurized simultaneously.
  • the manufacturing method of the liquid crystal display panel according to the present invention can improve the display quality and manufacturing yield of the liquid crystal display panel even if multiple processes are performed. Further, the liquid crystal display panel according to the present invention can be reduced in thickness and weight, has sufficient flexibility, and has high strength.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

La présente invention se rapporte à un panneau d'affichage à cristaux liquides comportant un cristal liquide qui est tenu de façon étanche entre une paire de substrats opposés l'un à l'autre. L'invention se rapporte également à un procédé de production de ce panneau. En particulier, cette invention se rapporte à panneau d'affichage à cristaux liquide adapté à la production en masse avec une importante capacité de production, tout en garantissant une qualité d'affichage élevée, ainsi qu'à un procédé de production de ce panneau. Un agent d'étanchéité est appliqué sur le substrat inférieur (12) en utilisant un dispositif de distribution pour former, de ce fait, la première jusqu'à la quatrième partie étanche (71, 73, 75, 77) sur le substrat inférieur (12). Lorsque les substrats supérieur et inférieur (10, 12) sont rapprochés, la première fente (65) est entourée sans discontinuité par la première partie étanche (71) et la seconde fente (67) est entourée sans discontinuité par la quatrième partie étanche (77).
PCT/JP2006/318716 2006-09-21 2006-09-21 Panneau d'affichage à cristaux liquides et procédé de production de ce panneau WO2008035421A1 (fr)

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JP2008535239A JP5131196B2 (ja) 2006-09-21 2006-09-21 液晶表示パネル及びその製造方法
PCT/JP2006/318716 WO2008035421A1 (fr) 2006-09-21 2006-09-21 Panneau d'affichage à cristaux liquides et procédé de production de ce panneau

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