Source: http://www.google.com/patents/US7256860?dq=5726663
Timestamp: 2016-08-31 07:14:50
Document Index: 310984560

Matched Legal Cases: ['Application No. 11', 'art 300', 'art 300', 'arts 121', 'art 300', 'art 300', 'art 300', 'art 300', 'art 300', 'art 300']

Patent US7256860 - Apparatus and method for manufacturing liquid crystal display device using ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn apparatus for manufacturing a liquid crystal display includes a unitary vacuum processing chamber having a substrate entrance, a loader part to load first and second substrates through the substrate entrance, one of the first and second substrates having a liquid crystal material disposed thereupon,...http://www.google.com/patents/US7256860?utm_source=gb-gplus-sharePatent US7256860 - Apparatus and method for manufacturing liquid crystal display device using unitary vacuum processing chamberAdvanced Patent SearchPublication numberUS7256860 B2Publication typeGrantApplication numberUS 10/843,554Publication dateAug 14, 2007Filing dateMay 12, 2004Priority dateFeb 6, 2002Fee statusPaidAlso published asCN1241051C, CN1437048A, DE10227826A1, DE10227826B4, US6829032, US7369210, US20030147038, US20040207799, US20050011609Publication number10843554, 843554, US 7256860 B2, US 7256860B2, US-B2-7256860, US7256860 B2, US7256860B2InventorsSang Seok Lee, Sang Ho ParkOriginal AssigneeLg.Philips Lcd Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (83), Non-Patent Citations (1), Referenced by (10), Classifications (11), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetApparatus and method for manufacturing liquid crystal display device using unitary vacuum processing chamber
US 7256860 B2Abstract
An apparatus for manufacturing a liquid crystal display includes a unitary vacuum processing chamber having a substrate entrance, a loader part to load first and second substrates through the substrate entrance, one of the first and second substrates having a liquid crystal material disposed thereupon, upper and lower stages disposed within the vacuum processing chamber for affixing the first and second substrates, a stage moving system for providing relative movement between the upper and lower stages, and a vacuum generating system for evacuating an interior of the vacuum processing chamber.
loading first and second substrates through a substrate entrance of a unitary vacuum processing chamber using first and second arms, one of the first and second substrates having a liquid crystal material disposed thereupon;
providing relative movement between upper and lower stages;
evacuating an interior of the vacuum processing chamber; and
bonding the first and second substrates together with the liquid crystal material disposed therebetween,
wherein the first arm places one of the first and second substrates onto a surface of the lower stage and the second arm places the other of the first and second substrates onto a surface of the upper stage, and
wherein one of said arms crosses over the other of said arms in placing its respective substrate.
2. The method according to claim 1, wherein the step of loading first and second substrates includes:
carrying the second substrate and affixing the second substrate to the upper stage;
carrying the first substrate having a liquid crystal material; and
affixing the first substrate to the lower stage.
3. The method according to claim 1, wherein the step of loading the first and second substrates includes enabling at least one electrostatic chuck or supplying a vacuum force to a plurality of vacuum holes provided on the surfaces of the upper and lower stages.
4. The method according to claim 3, wherein the enabling at least one electrostatic chuck includes energizing at least one pair of electrostatic plates.
5. The method according to claim 3, wherein the plurality of vacuum holes are formed along a circumference of the at least one electrostatic chuck.
6. The method according to claim 1, wherein the step of providing relative movement includes moving the upper stage by a drive motor provided at an exterior of the vacuum processing chamber, and a rotating the lower stage.
7. The method according to claim 1, further includes the step of verifying an alignment state between the first and second substrates by an alignment, system provided at one of an exterior and interior of the vacuum processing chamber before the step of bonding the first and second substrates.
8. The method according to claim 1, wherein the step of loading first and second substrates includes sequentially loading the one of the first and second substrates onto the surface of the upper stage by the second arm, and loading the other for the first and second substrates upon which the liquid crystal material is disposed onto the surface of the lower stage by the first arm.
9. The method according to claim 1, wherein the step of loading the first and second substrates includes sequentially loading the second substrate onto the surface of the upper stage by the second arm, and loading the first substrate upon which the liquid crystal material and a sealant are disposed onto the surface of the lower stage by the first arm.
10. A method for manufacturing a liquid crystal display device, comprising the steps of:
loading first and second substrates through a substrate entrance of a unitary vacuum processing chamber, one of the first and second substrates having a liquid crystal material disposed thereupon;
providing relative movement between upper and lower stages within the unitary vacuum processing chamber; and
wherein a first arm placing one of the first and second substrates onto a surface of the lower stage crosses over a second arm placing the other of the first and second substrates onto a surface of the upper stage.
11. The method according to claim 10, wherein the step of loading the first and second substrates includes enabling at least one electrostatic chuck or supplying a vacuum force to a plurality of vacuum holes provided on the surfaces of the upper and lower stages.
12. The method according to claim 10, wherein the step of providing relative movement includes moving the upper stage by a drive motor provided at an exterior of the vacuum processing chamber, and a rotating the lower stage.
13. The method according to claim 10, further includes the step of certifying an alignment state between the first and second substrates by an alignment system provided at one of an exterior and interior of the vacuum processing chamber before the step of bonding the first and second substrates.
14. The method according to claim 10, wherein the step of loading first and second substrates includes loading one of the first and second substrates onto the surface of the upper stage by the second arm, and holding the other of the first and second substrate upon which the liquid crystal material is disposed onto the surface of the lower stage by the first arm.
15. The method according to claim 10, wherein the step of loading the first and second substrates includes loading the second substrate onto the surface of the upper stage by the second arm, and loading the first substrate includes upon which the liquid crystal material and a sealant are disposed onto the surface of the lower stage by the first arm.
This is a divisional of application Ser. No. 10/126,963, filed on Apr. 22, 2002 now U.S. Pat. No. 6,829,032.
The present invention claims the benefit of the Korean Patent Application No. P2002-06640 filed on Feb. 6, 2002, which is hereby incorporated by reference.
The present invention relates to a manufacturing apparatus and method, and more particularly, to an apparatus and method for manufacturing a liquid crystal display device suitable for a large-sized liquid crystal display.
In general, recent developments in the information communication field have increased demand for various types of displays devices. In response to this demand, various flat panel type displays such as liquid crystal display (LCD), plasma display panel (PDP), electro-luminescent display (ELD), and vacuum fluorescent display (VFD) have been developed to replace conventional cathode ray tube (CRT) devices. In particular, LCD devices have been used because of their high resolution, light weight, thin profile, and low power consumption. In addition, LCD devices have been implemented in mobile devices such as monitors for notebook computers. Furthermore, LCD devices have been developed for monitors of computer and television to receive and display broadcasting signals.
Accordingly, efforts to improve image quality of LCD devices contrast with the benefits of high resolution, light weight, thin profile, and low power consumption. In order to incorporate LCD devices as a general image display, image quality such as fineness, brightness, large-sized area, for example, must be realized.
A plurality of gate lines are formed along one direction at fixed intervals on the first glass substrate (TFT array substrate), and a plurality of data lines are formed along a second direction perpendicular to one direction of the plurality of gate lines, thereby defining a plurality of pixel regions. Then, a plurality of pixel electrodes are formed in a matrix arrangement at the pixel regions, and a plurality of thin film transistors (TFT) are formed at the pixel regions. Accordingly, the plurality of thin film transistors are switched by signals transmitted along the gate lines and transfer signals transmitted along the data lines to each pixel electrode. In order to prevent light leakage, black matrix films are formed on the second glass substrate (color filter substrate) except at regions of the second glass substrate that correspond to the pixel regions of the first glass substrate.
A process for manufacturing an LCD device using a TFT substrate and a color filter substrate will be described with reference to a manufacturing apparatus according to the related art.
The process for manufacturing an LCD device according to the related art includes steps of forming a sealant pattern on one of a first and second substrate to form an injection inlet, bonding the first and second substrates to each other within a vacuum processing chamber, and injecting liquid crystal material through the injection inlet in the other vacuum chamber. In another process of manufacturing an LCD device according to the prior art, a liquid crystal dropping method, which is disclosed in Japanese Patent Application No. 11-089612 and 11-172903, includes steps of dropping liquid crystal material on a first substrate, arranging a second substrate over the first substrate, and moving the first and second substrates, thereby bonding the first and second substrates to each other. Compared to the liquid crystal injection method, the liquid crystal dropping method is advantageous in that various steps such as, formation of a liquid crystal material injection inlet, injection of the liquid crystal material, and sealing of the injection inlet are unnecessary since the liquid crystal material is predisposed on the first substrate.
FIGS. 1 and 2 show cross sectional views of a substrate bonding device using the liquid crystal dropping method according to the prior art. In FIG. 1, the substrate bonding device includes a frame 10, an upper stage 21, a lower stage 22, a sealant dispensor (not shown), a liquid crystal material dispensor 30, a processing chamber includes an upper chamber unit 31 and a lower chamber unit 32, a chamber moving system 40, and a stage moving system 50. The chamber moving system 40 includes a driving motor driven to selectively move the lower chamber unit 32 to a location at which the bonding process is carried out, or to a location at which outflow of the sealant occurs and dropping of the liquid crystal material. The stage moving system 50 includes another driving motor driven to selectively move the upper stage 21 along a vertical direction perpendicular to the upper and lower stages 21 and 22.
A process of manufacturing an LCD device using the substrate bonding apparatus according to the prior art follows. In FIG. 1 First, a second substrate 52 is placed upon the upper stage 21, and a first substrate 51 is placed upon the lower state 22. Then, the lower chamber unit 32 having the lower stage 22 is moved to a processing location (S1) by the chamber moving system 40 for sealant dispensing and liquid crystal material dispensing. In FIG. 2 Subsequently, the lower chamber unit 32 is moved to a processing location (S2) for substrate bonding by the chamber moving system 40. Thereafter, the upper and lower chamber units 31 and 32 are assembled together by the chamber moving system 40 to form a vacuum tight seal, and a pressure in the chamber is reduced by a vacuum generating system (not shown). Once a sufficient pressure is attained, the upper stage 21 is moved downwardly by the stage moving system 50 to fasten the second substrate 52 to the first substrate 51, and a continuous pressurization of the chamber completes the manufacture of the LCD device.
Unfortunately, the substrate bonding apparatus according to the prior art is disadvantageous. First, the substrate bonding apparatus according the prior art fails to dispense sealant and liquid crystal material on a substrate on which thin film transistors and a color filter are formed. Second, an overall size of the bonding apparatus fails to allow for other processing, thereby making it difficult in designing a layout for a manufacturing process of a liquid crystal display device. Third, due to performing multiple processes using a lower chamber unit, processing time is greatly increased, thereby decreasing overall productivity. According to the prior art, the amount of time to dispense the sealant on the first substrate, to dispense the liquid crystal material on the second substrate, and to bond the first and second substrates, results in significant amounts of time in which all of the manufacturing processes are sequentially performed and completed. Fourth, if a vacuum tight connection between the upper and lower chamber units is not attained, airflow will occur between the upper and lower chamber units, thereby resulting in a poor bond between the first and second substrates. Accordingly, additional components for assuring a vacuum tight seal between the upper and lower chamber units is required. Finally, alignment of the first and second substrates during bonding is difficult because of horizontal movement of the lower chamber unit, thereby increasing overall processing time.
Accordingly, the present invention is directed to an apparatus and method for bonding a liquid crystal display device, a method for using the apparatus, and a device produced by the method that substantially obviates one or more of the problems due to limitations and disadvantages of the prior art.
An object of the present invention is to provide an apparatus and method for a manufacturing a large-sized liquid crystal display device having a moving range and a direction of each stage for an alignment of the substrates.
Another object of the present invention is provide a liquid crystal display device made by the apparatus and method for manufacturing a large-sized liquid crystal display device.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, an apparatus for manufacturing a liquid crystal display device includes a unitary vacuum processing chamber having a substrate entrance, a loader part to carry and affix first and second substrates through the substrate entrance, one of the first and second substrates having a liquid crystal material disposed thereupon, upper and lower stages disposed within the vacuum processing chamber for affixing the first and second substrates, a stage moving system for providing relative movement between the upper and lower stages, and a vacuum generating system for evacuating an interior of the vacuum processing chamber.
In another aspect, a method for manufacturing a liquid crystal display device includes loading first and second substrates through a substrate entrance of a unitary vacuum processing chamber, one of the first and second substrates having a liquid crystal material disposed thereupon, providing relative movement between the upper and lower stages, evacuating an interior of the vacuum processing chamber, and bonding the first and second substrates together with the liquid crystal material disposed therebetween.
In another aspect, a liquid crystal display device manufactured by a method including loading first and second substrates through a substrate entrance of a unitary vacuum processing chamber, one of the first and second substrates having a liquid crystal material disposed thereupon, providing relative movement between the upper and lower stages, evacuating an interior of the vacuum processing chamber, and bonding the first and second substrates together with the liquid crystal material disposed therebetween.
FIG. 1 shows a cross sectional view of a substrate bonding device prior to sealing of upper and lower chamber units according to the prior art;
FIG. 2 shows a cross section view of the substrate bonding device during substrate bonding according to the prior art;
FIG. 3 shows an exemplary apparatus for manufacturing a liquid crystal display device during a loading process according to the present invention;
FIG. 4 shows the exemplary apparatus for manufacturing a liquid crystal display device during a vacuum process according to the present invention;
FIG. 5 shows the exemplary apparatus for manufacturing a liquid crystal display device during a location alignment process between substrates according to the present invention;
FIG. 6 shows the exemplary apparatus for manufacturing a liquid crystal display device during a bonding process of the substrates according to the present invention;
FIG. 7 shows the exemplary apparatus for manufacturing a liquid crystal display device during a further bonding process according to the present invention; and
FIG. 8 shows the exemplary apparatus for manufacturing a liquid crystal display device during an unloading process according to the present invention.
FIG. 3 shows an exemplary apparatus for manufacturing a liquid crystal display device during a loading process according to the present invention. In FIG. 3, the apparatus may include a vacuum processing chamber 110, an upper stage 121, a lower stage 122, an upper stage moving axis 131, a lower stage rotational axis 132, an upper stage driving motor 133, a lower stage driving motor 134, a vacuum generating system 200, and a loader part 300.
The vacuum processing chamber 110 may be connected to the vacuum generating system 200 by an air outlet 112 via an air outlet valve 112 a for reducing a pressure of an interior of the vacuum processing chamber 110. The vacuum processing chamber may include a vent pipe 113 for increasing the pressure of the interior of the vacuum processing chamber 110 via introduction of air or gas through a vent pipe valve 113 a. Accordingly, the vacuum processing chamber may include a vacuum processing chamber entrance 111 to allow for introduction and extraction of a first substrate 510 and a second substrate 520 by the loader part 300.
The upper and lower stages parts 121 and 122 may be provided at upper and lower portions of the vacuum processing chamber 110, respectively. The upper and lower stages 121 and 122 may include an electrostatic chuck (ESC) 121 a and 122 a provided at a opposing surfaces of the upper and lower stages 121 and 122, respectively. Accordingly, the upper electrostatic chuck 121 a electrostatically attaches the substrate 520 to the upper stage 121, and the lower electrostatic chuck 122 a electrostatically attaches the substrate 510 to the lower stage 122. In addition, the upper stage 121 may include a plurality of vacuum holes 121 b formed through the upper stage 121, thereby attaching the substrate 520 to the upper stage 121 by forming a vacuum within the plurality of vacuum holes 121 b. The upper and lower electrostatic chucks 121 a and 122 a may be provided with at least one pair of electrostatic plates having different polarities to apply serial power having different polarities. Alternatively, the upper and lower electrostatic chucks 121 a and 122 a may be provided with electrostatic plates simultaneously having two identical polarities.
The plurality of the vacuum holes 121 b may be formed in a center portion and along a circumference of the upper electrostatic chuck 121 a, and may be connected to a single or multiple pipes 121 c to transmit a vacuum force generated by a vacuum pump 123 connected to the upper stage 121. Alternatively, even though the upper electrostatic chuck 121 a and the plurality of vacuum holes 121 b may be formed to have a shape similar to the upper stage 121, it may preferable to arrange the upper electrostatic chuck 121 a and the plurality of vacuum holes 121 b based upon a geometry of the substrate 520 or upon a geometry of a region upon which liquid crystal material is disposed.
The upper stage moving axis 131 drives the upper stage 121, the lower stage rotational axis 132 drives the lower stage 122, and the upper and lower stage driving motors 133 and 134 drive the upper and lower stages 121 and 122, respectively, at inner and outer sides of the vacuum processing chamber 110. A driving system 135 may be provided driving the lower stage 122 during an alignment process for aligning the first and second substrates 510 and 520.
The vacuum generating system 200 may transmit a suction force to generate a vacuum state inside the vacuum processing chamber 110, and may include a suction pump driven to generate a general vacuum force. In addition, the vacuum generating system 200 may be interconnected to the air outlet 112 of the vacuum processing chamber 110.
The loader part 300 may be a mechanical device separate from the vacuum processing chamber 110, and may be provided at the outer side of the vacuum processing chamber 110. The loader part 300 may receive one of the first substrate 510 and the second substrate 520 upon which at least the liquid crystal material is disposed. In addition, the first substrate 510 may include both the liquid crystal material and the sealant. Moreover, the first substrate 510 may include one of a TFT array substrate and a color filter (C/F) substrate, and the second substrate 520 may include another one of the TFT array substrate and the C/F substrate. Then, the loader part 300 may selectively load both of the first and second substrates 510 and 520 into the vacuum processing chamber 110. The loader part 300 may include a first arm 310 to carry the first substrate 510 upon which at least the liquid crystal material is disposed, and a second arm 320 to carry the second substrate 520. During the loading of the first and second substrates 510 and 520, the first arm 310 may be placed over the second arm 320.
An alignment system 600 may be further included to certify an alignment state of the first and second substrates 510 and 520. The alignment system 600 may be provided to at least one of the inner and outer sides of the vacuum processing chamber 110. Since movement of the lower stage 122 may be limited, an alignment state between the first and second substrates 510 and 520 may be accurately and quickly achieved.
Hereinafter, a bonding process of the first and second substrates 510 and 520 using the apparatus for manufacturing a liquid crystal display device according to the present invention will now be explained.
In FIG. 3, the loader part 300 receives one of the first substrate 510 and the second substrate 520 upon which at least a liquid crystal material is disposed at the first arm 310, and an other of the first substrate 510 and the second substrate 520 at the second arm 320. The second arm 320 loads the substrate 520 onto a lower surface of the upper stage 121, and the first arm 310 loads the substrate 510 upon which at least the liquid crystal material is disposed onto an upper surface of the lower stage 122. The substrate 520 may be loaded onto the lower surface of the upper stage 122 before the substrate 510 upon which at least the liquid crystal material is disposed in order to prevent any particles from being deposited upon the substrate 510. During the loading process of the substrate 510, the partilces can fall on the substrate 510 on which a liquid crystal material is disposed.
The second arm 320 carries the substrate 520 under the upper stage, and then a vacuum pump 123 is enabled to transmit a vacuum force to each of the plurality of vacuum holes 121 b at the upper stage 121. The first arm 310 carries the substrate 510 above the lower stage 122 to affix the substrate 520 to the upper stage 121 from the second arm 320 and a vacuum pump (not shown) is enabled to transmit a vacuum force to each of the plurality of vacuum holes (not shown) at the lower stage 122 to affix the substrate 510 to the lower stage 122 from the first arm 310.
After the loading of the substrates 510 and 520 is completed, shielding door 114 disposed at the vacuum processing chamber entrance 111 is enabled, thereby sealing the vacuum processing chamber entrance 111.
FIG. 4 shows the exemplary apparatus for manufacturing a liquid crystal display device during a vacuum process according to the present invention. In FIG. 4, the vacuum generating system 200 is enabled, and the air outlet valve 112 a is opened, thereby evacuating the interior of the vacuum processing chamber 110. Once the interior of the vacuum processing chamber 110 is successfully evacuated to a desired pressure, the vacuum generating system 200 may be disabled, and the air outlet valve 112 a may be closed. Accordingly, power may be applied to the upper and lower electrostatic chucks 121 a and 122 a, thereby affixing the substrates 510 and 520 to the upper and lower stages 121 and 122 by an electrostatic force.
FIG. 5 shows the exemplary apparatus for manufacturing a liquid crystal display device during a location alignment process between substrates according to the present invention. In FIG. 5, the upper stage driving motor 133 moves the upper stage 121 toward the lower stage 122, so that the upper stage 121 is placed adjacent to the lower stage 122. Then, the alignment system 600 certifies the alignment state of the first and second substrates 510 and 520 that are attached to the upper and lower stages 121 and 122, respectively. The alignment system 600 transmits a control signal to the upper stage moving axis 131 and to the lower stage rotational axis 132, thereby aligning the first and second substrates 510 and 520.
FIG. 6 shows the exemplary apparatus for manufacturing a liquid crystal display device during a bonding process of the substrates according to the present invention. In FIG. 6, the upper stage moving axis 131 is driven in response to a drive signal received from the alignment system 600, and performs a first bonding process to bodn the substrates 510 and 520. However, the first bonding process may not necessarily completely bond the substrates 510 and 520. The first bonding process loosely bonds the substrates 510 and 520 such that air is not to be introduced between the bonded substrates when the pressure of the vacuum processing chamber is increased to atmospheric pressure.
FIG. 7 shows the exemplary apparatus for manufacturing a liquid crystal display device during a further bonding process according to the present invention. In FIG. 7, the vent pipe valve 113 a is enabled, thereby allowing the pressure of the interior of the vacuum processing chamber 110 to reach atmospheric pressure. Accordingly, the bonded substrates are further compressed due to the pressure difference between the evacuated interior between the bonded substrates and the atmospheric pressure of the vacuum processing chamber 110.
According to this, more complete bonding process is performed, and if the bonding process is completed, the shielding door 114 of the vacuum processing chamber 110 is operative, so that the entrance 111 closed by the shielding door is opened.
FIG. 8 shows the exemplary apparatus for manufacturing a liquid crystal display device during an unloading process according to the present invention. In FIG. 8, unloading of the bonded substrates is performed by the second arm 320 of the loader part 300.
It will be apparent to those skilled in the art than various modifications and variations can be made in the apparatus and method for manufacturing a liquid crystal display device of the present invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3978580Sep 27, 1974Sep 7, 1976Hughes Aircraft CompanyMethod of fabricating a liquid crystal displayUS4094058Jul 23, 1976Jun 13, 1978Omron Tateisi Electronics Co.Method of manufacture of liquid crystal displaysUS4653864Feb 26, 1986Mar 31, 1987Ovonic Imaging Systems, Inc.Liquid crystal matrix display having improved spacers and method of making sameUS4691995Jul 15, 1986Sep 8, 1987Semiconductor Energy Laboratory Co., Ltd.Liquid crystal filling deviceUS4775225May 14, 1986Oct 4, 1988Canon Kabushiki KaishaLiquid crystal device having pillar spacers with small base periphery width in direction perpendicular to orientation treatmentUS5247377Jul 24, 1989Sep 21, 1993Rohm Gmbh Chemische FabrikProcess for producing anisotropic liquid crystal layers on a substrateUS5263888Feb 11, 1993Nov 23, 1993Matsushita Electric Industrial Co., Ltd.Method of manufacture of liquid crystal display panelUS5379139Jul 6, 1992Jan 3, 1995Semiconductor Energy Laboratory Co., Ltd.Liquid crystal device and method for manufacturing same with spacers formed by photolithographyUS5406989Oct 12, 1993Apr 18, 1995Ayumi Industry Co., Ltd.Method and dispenser for filling liquid crystal into LCD cellUS5499128Mar 15, 1994Mar 12, 1996Kabushiki Kaisha ToshibaLiquid crystal display device with acrylic polymer spacers and method of manufacturing the sameUS5507323Nov 22, 1994Apr 16, 1996Fujitsu LimitedMethod and dispenser for filling liquid crystal into LCD cellUS5511591Apr 10, 1995Apr 30, 1996Fujitsu LimitedMethod and dispenser for filling liquid crystal into LCD cellUS5539545May 17, 1994Jul 23, 1996Semiconductor Energy Laboratory Co., Ltd.Method of making LCD in which resin columns are cured and the liquid crystal is reorientedUS5548429Jun 14, 1994Aug 20, 1996Canon Kabushiki KaishaProcess for producing liquid crystal device whereby curing the sealant takes place after pre-baking the substratesUS5642214Jul 5, 1994Jun 24, 1997Sharp Kabushiki KaishaOptical modulating element and electronic apparatus using itUS5680189Jun 7, 1995Oct 21, 1997Semiconductor Energy Laboratory Co., Ltd.LCD columnar spacers made of a hydrophilic resin and LCD orientation film having a certain surface tension or alignment capabilityUS5742370Feb 26, 1997Apr 21, 1998Korea Institute Of Science And TechnologyFabrication method for liquid crystal alignment layer by magnetic field treatmentUS5757451Sep 9, 1996May 26, 1998Kabushiki Kaisha ToshibaLiquid crystal display device spacers formed from stacked color layersUS5852484May 27, 1997Dec 22, 1998Matsushita Electric Industrial Co., Ltd.Liquid crystal display panel and method and device for manufacturing the sameUS5854664Sep 25, 1995Dec 29, 1998Matsushita Electric Industrial Co., Ltd.Liquid crystal display panel and method and device for manufacturing the sameUS5861932Mar 30, 1998Jan 19, 1999Denso CorporationLiquid crystal cell and its manufacturing methodUS5875922Oct 10, 1997Mar 2, 1999Nordson CorporationApparatus for dispensing an adhesiveUS5952676Jun 6, 1997Sep 14, 1999Semiconductor Energy Laboratory Co., Ltd.Liquid crystal device and method for manufacturing same with spacers formed by photolithographyUS5956112Oct 1, 1996Sep 21, 1999Sharp Kabushiki KaishaLiquid crystal display device and method for manufacturing the sameUS6001203Dec 10, 1997Dec 14, 1999Matsushita Electric Industrial Co., Ltd.Production process of liquid crystal display panel, seal material for liquid crystal cell and liquid crystal displayUS6011609Oct 2, 1997Jan 4, 2000Samsung Electronics Co., Ltd.Method of manufacturing LCD by dropping liquid crystals on a substrate and then pressing the substratesUS6016178Mar 14, 1997Jan 18, 2000Sony CorporationReflective guest-host liquid-crystal display deviceUS6016181Oct 21, 1997Jan 18, 2000Sharp Kabushiki KaishaLiquid crystal device having column spacers with portion on each of the spacers for reflecting or absorbing visible light and method for fabricating the sameUS6055035May 11, 1998Apr 25, 2000International Business Machines CorporationMethod and apparatus for filling liquid crystal display (LCD) panelsUS6163357Sep 26, 1997Dec 19, 2000Kabushiki Kaisha ToshibaLiquid crystal display device having the driving circuit disposed in the seal area, with different spacer density in driving circuit area than display areaUS6205368Mar 30, 1998Mar 20, 2001Daihen CorporationWork transport control methodUS6219126Nov 20, 1998Apr 17, 2001International Business Machines CorporationPanel assembly for liquid crystal displays having a barrier fillet and an adhesive fillet in the peripheryUS6226067Sep 30, 1998May 1, 2001Minolta Co., Ltd.Liquid crystal device having spacers and manufacturing method thereofUS6236445Feb 22, 1996May 22, 2001Hughes Electronics CorporationMethod for making topographic projectionsUS6304306Apr 20, 1998Oct 16, 2001Sharp Kabushiki KaishaLiquid crystal display device and method for producing the sameUS6304311Nov 11, 1999Oct 16, 2001Matsushita Electric Industrial Co., Ltd.Method of manufacturing liquid crystal display deviceUS6337730Jun 1, 1999Jan 8, 2002Denso CorporationNon-uniformly-rigid barrier wall spacers used to correct problems caused by thermal contraction of smectic liquid crystal materialUS6414733Feb 7, 2000Jul 2, 2002Dai Nippon Printing Co., Ltd.Color liquid crystal display with a shielding member being arranged between sealing member and display zoneUS6829032 *Apr 22, 2002Dec 7, 2004Lg. Philips Lcd Co., Ltd.Apparatus and method for manufacturing liquid crystal device using unitary vacuum processing chamberUS20010021000Feb 1, 2001Sep 13, 2001Norihiko EgamiApparatus and method for manufacturing liquid crystal displayUS20020008838Jul 19, 2001Jan 24, 2002Nec CorporationApparatus and method of manufacturing liquid crystal displayUS20050011609 *Aug 13, 2004Jan 20, 2005Lg. Philips Lcd Co., Ltd.Apparatus and method for manufacturing liquid crystal display deviceCN1234524AJan 13, 1999Nov 10, 1999松下电器产业株式会社Method for producing liquid crystal display deviceEP1003066A1Nov 9, 1999May 24, 2000Matsushita Electric Industrial Co., Ltd.Method of manufacturing liquid crystal display devicesJPH039549A Title not availableJPH0536425A Title not availableJPH0536426A Title not availableJPH0559546A Title not availableJPH0618829A Title not availableJPH0651256A Title not availableJPH0664229A Title not availableJPH05107533A Title not availableJPH05127179A Title not availableJPH05154923A Title not availableJPH05265011A Title not availableJPH05281557A Title not availableJPH05281562A Title not availableJPH06148657A Title not availableJPH06160871A Title not availableJPH06194637A Title not availableJPH06235925A Title not availableJPS617822A Title not availableJPS5165056A Title not availableJPS5165656A Title not availableJPS5738414A Title not availableJPS5788428A Title not availableJPS5827126A Title not availableJPS5957221A Title not availableJPS6155625A Title not availableJPS6254225A Title not availableJPS6254228A Title not availableJPS6254229A Title not availableJPS6289025A Title not availableJPS6290622A Title not availableJPS59195222A Title not availableJPS60111221A Title not availableJPS60164723A Title not availableJPS60217343A Title not availableJPS62205319A Title not availableJPS63109413A Title not availableJPS63110425A Title not availableJPS63128315A Title not availableJPS63311233A Title not available* Cited by examinerNon-Patent CitationsReference1 *Machine translation of JP 2001-264782.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7369210 *Aug 13, 2004May 6, 2008Lg.Philips Lcd Co., Ltd.Apparatus and method for manufacturing liquid crystal display device using unitary vacuum processing chamberUS7466391 *Jul 26, 2005Dec 16, 2008Sharp Kabushiki KaishaMethod and apparatus for fabricating liquid crystal display device and substrate base material for liquid crystal display deviceUS7486375 *Sep 22, 2005Feb 3, 2009Samsung Electronics Co., Ltd.Device for cooling LCD panel and heat treatment apparatus having the sameUS7839477 *Jun 30, 2006Nov 23, 2010Lg Display Co., Ltd.Substrate bonding apparatus for liquid crystal display panelUS8194226Jun 5, 2012Samsung Electronics Co., Ltd.Device for cooling LCD panel and heat treatment apparatus having the sameUS20050011609 *Aug 13, 2004Jan 20, 2005Lg. Philips Lcd Co., Ltd.Apparatus and method for manufacturing liquid crystal display deviceUS20060021671 *Jul 26, 2005Feb 2, 2006Sharp Kabushiki KaishaMethod and apparatus for fabricating liquid crystal display device and substrate base material for liquid crystal display deviceUS20060072082 *Sep 22, 2005Apr 6, 2006Youn-Ho LeeDevice for cooling LCD panel and heat treatment apparatus having the sameUS20070151673 *Jun 30, 2006Jul 5, 2007Lg.Philips Lcd Co., Ltd.Substrate bonding apparatus for liquid crystal display panelUS20090115956 *Dec 29, 2008May 7, 2009Samsung Electronics Co., Ltd.Device for cooling lcd panel and heat treatment apparatus having the same* Cited by examinerClassifications U.S. Classification349/187, 349/190, 349/189International ClassificationG02F1/13, G02F1/1339, G02F1/1341Cooperative ClassificationB32B2457/202, B32B2457/20, B32B2309/68, G02F1/1341European ClassificationG02F1/1341Legal EventsDateCodeEventDescriptionOct 17, 2008ASAssignmentOwner name: LG DISPLAY CO., LTD., KOREA, REPUBLIC OFFree format text: CHANGE OF NAME;ASSIGNOR:LG.PHILIPS LCD CO., LTD.;REEL/FRAME:021754/0230Effective date: 20080304Owner name: LG DISPLAY CO., LTD.,KOREA, REPUBLIC OFFree format text: CHANGE OF NAME;ASSIGNOR:LG.PHILIPS LCD CO., LTD.;REEL/FRAME:021754/0230Effective date: 20080304Dec 27, 2010FPAYFee paymentYear of fee payment: 4Feb 4, 2015FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services