US20050117107A1 - In-line system and a method for manufacturing a liquid crystal display - Google Patents
In-line system and a method for manufacturing a liquid crystal display Download PDFInfo
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- US20050117107A1 US20050117107A1 US11/028,642 US2864205A US2005117107A1 US 20050117107 A1 US20050117107 A1 US 20050117107A1 US 2864205 A US2864205 A US 2864205A US 2005117107 A1 US2005117107 A1 US 2005117107A1
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 138
- 239000000565 sealant Substances 0.000 claims abstract description 53
- 125000006850 spacer group Chemical group 0.000 claims abstract description 32
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 24
- 238000000151 deposition Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims description 26
- 239000000463 material Substances 0.000 abstract description 49
- 239000011521 glass Substances 0.000 abstract description 11
- 230000006835 compression Effects 0.000 description 30
- 238000007906 compression Methods 0.000 description 30
- 210000004027 cell Anatomy 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
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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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13392—Gaskets; Spacers; Sealing of cells spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
-
- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1341—Filling or closing of cells
Definitions
- the present invention relates to a system and method for manufacturing liquid crystal displays.
- a liquid crystal display is structured having liquid crystal material injected between two substrates.
- the two substrates have electrodes formed on an inner surface thereof and are joined using a sealant.
- a plurality of spacers are provided between the substrates to maintain a predetermined cell gap.
- the liquid crystal material sandwiched between the substrates is dielectrically anisotropic such that, when a voltage of a different potential is applied to electrodes of the substrates to form an electric field, the alignment of liquid crystal molecules of the liquid crystal material is varied. Accordingly, the transmittance of incident light is controlled to enable the display of images.
- orientation layers for orienting the liquid crystal molecules of the liquid crystal material are first provided on the substrates, and an orientation process is performed. Next, spacers are dispersed on one of the substrates, then the sealant is applied to outer edges of the substrates. The sealant is provided with a hole through which the liquid crystal material is to be injected. Following this step, the substrates are aligned then attached through a hot press process. Next, liquid crystal material is injected through the hole of the sealant, after which the hole is sealed.
- a plurality of liquid crystal cells are formed from a single mother glass.
- the mother glass is divided into 4, 6 or 8 liquid crystal cells (but not yet cut into these divisions), after which the process is continued on the individual liquid crystal cells.
- a serious drawback of the conventional LCD manufacturing process is that it is time-consuming.
- the injection of the liquid crystal material must be performed when the space between the substrates is kept vacuum. Both keeping vacuum while maintaining the cell gap, , and injecting the liquid crystal material through the small injection hole require substantial amounts of time.
- the time required for each individual process may vary according to, for example, the drive method used for a particular LCD, and since there occurs a switch during production from processes performed on the mother glass to those performed on the individual liquid crystal cells, it becomes difficult to provide production equipment for the specific processes in an in-line configuration or to automate manufacture. This substantially limits the productivity improvement.
- the spacers become re-positioned by the forces generated from the flow of the liquid crystal material, thereby making it difficult to obtain a uniform cell gap.
- the present invention has been made in an effort to solve the above problems.
- the in-line system comprises a spacer-dispersing unit for dispersing spacers on one of two substrates of a mother glass, the mother glass having at least one liquid crystal cell region; a sealant-applying unit for depositing a sealant on one of the two substrates; a liquid crystal depositing unit for depositing liquid crystal material on the substrate on which the sealant is deposited; and a substrate-attaching unit for receiving the two substrates from the sealant-applying unit or the liquid crystal depositing unit, then conjoining the substrates in a vacuum state to complete a liquid crystal display panel.
- the method for manufacturing a liquid crystal display panel is also provided.
- FIG. 1 is a plan view of a liquid crystal panel produced using an in-line system according to a preferred embodiment of the present invention
- FIG. 2 is a sectional view taken along line II-II′ of FIG. 1 ;
- FIG. 3 is a schematic block diagram of an in-line system for manufacturing liquid crystal displays according to a preferred embodiment of the present invention
- FIGS. 4A and 4B are sectional views of a spacer according to a preferred embodiment of the present invention.
- FIGS. 5A and 5B are plan views of a substrate for showing the formation of a sealant when manufacturing a liquid crystal display according to a preferred embodiment of the present invention
- FIGS. 6A, 6B and 6 C are sectional views showing the sequential steps involved in hardening a sealant when manufacturing a liquid crystal display according to a preferred embodiment of the present invention
- FIGS. 7A and 7B are views for describing the deposition of liquid crystal material when manufacturing a liquid crystal display according to a preferred embodiment of the present invention.
- FIGS. 8A, 8B , 8 C, 9 A, and 9 B are views for describing the adhesion of a substrate on a pressure plate when manufacturing a liquid crystal display according to a preferred embodiment of the present invention
- FIGS. 10, 11 and 12 are views showing a structure of a substrate-attaching unit in an in-line system according to different embodiments of the present invention.
- FIGS. 13A, 13B , 13 C, 13 D, 13 E and 13 F are plan views of a compression plate in a substrate-attaching unit according to a preferred embodiment of the present invention.
- FIG. 14 is a schematic view of an in-line system having a plurality of substrate-attaching units according to another embodiment of the present invention.
- FIG. 1 shows a plan view of a liquid crystal panel produced using an in-line system according to a preferred embodiment of the present invention
- FIG. 2 shows a sectional view taken along line II-II′ of FIG. 1 .
- a liquid crystal panel 100 which is made from a single mother glass that has undergone liquid crystal injection and substrate-attachment processes, includes a plurality of liquid crystal cells. For example, four liquid crystal cell regions 111 , 121 , 131 and 141 are formed in the liquid crystal panel 100 .
- the liquid crystal panel 100 includes insulation substrates 110 and 120 opposing each other and a liquid crystal layer 130 , which is formed of liquid crystal material injected between the substrates 110 and 120 .
- Spherical spacers 140 are mixed in with the liquid crystal layer 130 .
- the spacers 140 maintain a predetermined cell gap between the substrates 110 and 120 such that the substrates 110 and 120 are substantially parallel.
- a sealant 150 is formed around edges of each liquid crystal cell such that the liquid crystal layer 130 is sealed between the substrates 110 and 120 . Spacers may also be mixed in with the sealant 150 .
- the liquid crystal layer 130 is injected before the liquid crystal panel 100 is divided into liquid crystal cells.
- the liquid crystal cells are divided along cut lines a and b, and only after completing both liquid crystal injection and substrate-attachment processes.
- Wiring for transmitting electrical signals such as scanning signals and image signals may be formed on the substrates 110 and 120 of the liquid crystal panel 100 .
- the wirings intersect to define pixel regions.
- Thin film transistors are formed as switching devices for controlling image signals.
- Pixel electrodes and a common electrode are laid to form an electric field to drive liquid crystal molecules of the liquid crystal material.
- an RGB color filter is formed for displaying images.
- FIG. 3 shows a schematic block diagram of an in-line system for manufacturing liquid crystal displays according to a preferred embodiment of the present invention.
- an in-line system for manufacturing liquid crystal displays includes a first loading unit 1000 , a spacer-dispersing unit 2000 , a sealant-applying unit 3000 , a sealant heat-treating unit 4000 , a liquid crystal depositing unit 5000 having a liquid crystal depositer 5100 , a substrate-combination unit 6000 , a second loading unit 7000 , a substrate-attaching unit 8000 , and an unloading unit 9000 .
- in-line conveying units 1110 , 1120 , 1130 , 1140 , 1150 , 1170 and 1180 for conveying the substrates 110 and 120 from one process to the next.
- the second loading unit 7000 is connected to the substrate-combination unit 6000 through an in-line conveying unit 1160 . Since the substrates 110 and 120 are attached at the substrate-attaching unit 8000 in a vacuum state between the substrates 110 and 120 , the in-line conveying units 1170 and 1180 may include vacuum chamber connecting means.
- the substrate 110 which is loaded on the first loading unit 1000 , is transported to the spacer-dispersing unit 2000 via the in-line conveying unit 1110 .
- the spacers 140 are dispersed at a predetermined density on an inner face of the substrate 110 at the spacer-dispersing unit 2000 .
- the spacers 140 be spherical or cylindrical and have a diameter that is 10-30% greater than the desired cell gap between the substrates 110 and 120 .
- external shocks or vibrations during manufacture or the flow of the liquid crystal material may displace the spacers 140 from their intended positions. This results in a non-uniform cell gap between the substrates 110 and 120 . Accordingly, it is preferable that the spacers 140 are adhered to the substrate 110 after being dispersed.
- the spacers 140 are coated with an adhesive 142 , which is made from an epoxy group polymer.
- adhesive 142 which is made from an epoxy group polymer.
- infrared rays are irradiated onto the substrate 100 and the spacers 140 dispersed thereon such that the adhesive 142 on an upper portion of the spacers 140 melts down to fully surround a lower portion of the spacers 140 , as shown in FIG. 4B .
- the spacers 140 are fixed to their positions on the substrate 110 .
- the substrate 110 is transported from the spacer-dispersing unit 2000 to the sealant-applying unit 3000 via the in-line conveying unit 1120 .
- the sealant 150 is deposited on the substrate 110 at the sealant-applying unit 3000 .
- the sealant 150 is formed in a closed configuration, that is, the sealant 150 does not include a liquid crystal injection hole as in the prior art.
- the sealant 150 may formed of a heat-hardening material or an infrared ray-hardening material, and may include spacers for better maintaining the cell gap between the substrates 110 and 120 .
- a buffer region(s) is formed in the sealant 150 such that liquid crystal material fully fills display portions and any excess liquid crystal material flows into the buffer region(s).
- at least one buffer region 151 is formed in the sealant 150 .
- buffer regions 152 which allow the inflow of excess liquid crystal material, are formed around a circumference of the display region c. It is preferable that the amount of liquid crystal material deposited during a subsequent liquid crystal depositing process is in excess of an amount needed to fill the display region c and less than a volume defined by the sealant 150 .
- the substrate 110 is transported from the sealant-applying unit 3000 to the sealant heat-treating unit 4000 by the in-line conveying unit 1130 .
- a reaction prevention layer is formed on a surface of the sealant 150 through an exposure or heat-treating process such that no reaction takes place between the liquid crystal layer 130 and the sealant 150 .
- an infrared ray-hardening material is used for the sealant 150 .
- the sealant 150 is divided into a portion 155 that is hardened and is comprised of the reaction prevention layer, and a portion 157 that has not been hardened.
- the reaction prevention layer of the portion 155 on the surface of the sealant 150 is pressed by the conjoining of the substrates 110 and 120 . Further, during a second hardening process with reference to FIG. 6C , infrared rays are irradiated onto the substrates 110 and 120 such that the sealant 150 is fully hardened, thereby completing the attachment of the substrates 110 and 120 .
- the substrate 110 is transported to the liquid crystal depositing unit 5000 from the sealant heat-treating unit 4000 via the in-line conveying unit 1140 .
- the liquid crystal depositer 5100 predetermined amounts of the liquid crystal material are deposited such that the liquid crystal layer 130 is formed to correspond to the sizes of the liquid crystal cell regions 111 , 121 , 131 and 141 .
- the liquid crystal depositer 5100 may be a syringe-type device such that liquid crystal material 132 is provided in specific areas, that is, in the liquid crystal cell regions 111 , 121 , 131 and 141 .
- the liquid crystal depositer 5100 may also be a spray-type device, which includes a jig 5110 and a nozzle 5120 connected to the jig 5110 , which is able to provide the liquid crystal material 132 over an entire surface of the liquid crystal cell regions 111 , 121 , 131 and 141 as shown in FIG. 7B .
- the syringe-type liquid crystal depositor device is advantageous when the liquid crystal panel 100 of the mother glass is produced into a single liquid crystal cell. With this configuration, it is preferable that the substrate 110 is rotated at approximately 30-60 rpm to reduce the time required to deposit the liquid crystal material 132 .
- the spray-type liquid crystal depositor has an advantage in adjusting the liquid crystal material 132 deposition. That is, the number of nozzles 5120 as well as an application length (d) may be controlled such that the spray-type liquid crystal depositor can be used for various sizes of liquid crystal cells.
- liquid crystal material is injected using a liquid crystal injection hole by keeping each of the liquid crystal cells vacuum.
- the manufacturing time is substantially.
- the time for supplying the liquid crystal material 132 to the substrate 110 can be fixed regardless of liquid crystal cell size and characteristics of the liquid crystal material 132 , since because the liquid crystal material 132 is deposited or dispersed.
- the substrate 110 is transported to the substrate-combination unit 6000 via the in-line conveying unit 1150 .
- the substrate 120 loaded on the second loading unit 7000 is transported to the substrate-combination unit 6000 through the in-line conveying unit 1160 .
- the substrate-attaching unit 8000 includes a first compression plate 8100 and a second compression plate 8200 , as shown in FIG. 3 .
- the substrates 110 and 120 are mounted to the compression plates 8100 and 8200 , respectively, such that they are aligned in parallel.
- the compression plates 8100 and 8200 apply a uniform force toward each other such that the substrates 110 and 120 are pressed together. As a result of this force, the spacers 140 (see FIG.
- the liquid crystal material deposited on the substrate 110 is spread over the entire area of the liquid crystal cell regions 111 , 121 , 131 and 141 (see FIG. 1 ) to form the liquid crystal layer 130 (see FIG. 2 ).
- an exposure unit (not shown) is used to irradiate infrared rays onto the substrates 110 and 120 for a second hardening process such that the sealant 150 is fully hardened.
- the substrates 110 and 120 are conjoined as shown in FIG. 6 . It is preferable that the substrates 110 and 120 be precisely aligned either during the process of compressing the substrates 110 and 120 or when performing the second hardening process. Also, it is preferable that an air pressurization method be used in order to apply an even pressure to the substrates 1 10 and 120 .
- a point vacuum adhesion method or a planar vacuum adhesion method may be used.
- a point vacuum adhesion method is used, with reference to FIGS. 8A, 8B and 8 C, pipes 8110 mounted to the first and second compression plates 8100 and 8200 at areas corresponding to corner portions of the substrates 110 and 120 are pressed against the substrates 110 and 120 , then a vacuum is formed in an inside area 8111 of the pipes 8110 . Accordingly, the substrates 110 and 120 are attached to the 8100 and 8200 as long as the vacuum is maintained.
- center portions 112 and 122 respectively of the substrates 110 and 120 may become deformed as shown in FIG. 8B , making it difficult to align the substrates 110 and 120 precisely.
- a vacuum hole be formed in the compression plates 8100 and 8200 as shown in FIG. 8C to keep the space between the compression plates 8100 and 8200 and the substrates 110 and 120 vacuum by pumping the air out therebetween.
- a planar suction mechanism 8220 is provided on the compression plates 8100 and 8200 .
- the planar suction mechanism 8220 includes a plurality of openings 8221 , which can be formed in a variety of shapes over the entire area of the planar suction mechanism 8220 . After contacting the planar suction mechanism 8220 to the substrates 110 and 120 , air is drawn inwardly through the openings 8221 to adhere the substrates 110 and 120 to the compression plates 8100 and 8200 .
- the planar vacuum adhesion method is preferred over the point vacuum adhesion method for a variety of reasons.
- the substrates 110 and 120 are supported over an entire area. It can be easily applied to a variety of sizes of substrates. It can prevent substrate deformation problems. Also it can attach the substrates 110 and 120 more rigidly to the compression plates 8100 and 8200 .
- the conjoined substrates 110 and 120 i.e., the completed liquid crystal panel 100
- the unloading unit 9000 from the substrate-attaching unit 8000 through the in-line conveying unit 1180 .
- the liquid crystal panel 100 is transported to a cutting unit (not shown) where the liquid crystal panel 100 is cut into portions corresponding to the liquid crystal cells 111 , 121 , 131 and 141 .
- a vacuum must be formed in order to attach the substrates 110 and 120 to one another.
- the time required for forming the vacuum is greater than that needed to disperse the spacers 140 , deposit the sealant 150 or liquid crystal material, or in the actual conjoining of the substrates 110 and 120 .
- Overall productivity is reduced as a result.
- a plurality of vacuum chambers may be used.
- a method may be used that can minimize the occasions wherea vacuum must be formed. This will be described in detail with reference to the drawings.
- FIGS. 10, 11 and 12 are views showing a structure of a substrate-attaching unit in an in-line system according to different embodiments of the present invention. Like reference numerals will be used for elements identical to those of the above embodiment.
- a substrate-attaching unit 8000 includes first, second, third and fourth vacuum chambers 8300 , 8400 , 8500 and 8600 ; connecting units 8010 , 8020 and 8030 , which interconnect the vacuum chambers 8300 , 8400 , 8500 and 8600 ; a substrate-attaching vacuum chamber 8700 ; and a connecting unit 8040 connecting the substrate-attaching vacuum chamber 8700 to the fourth vacuum chamber 8600 .
- the substrates 110 and 120 are moved in sequence through the first, second, third and fourth vacuum chambers 8300 , 8400 , 8500 and 8600 , which generate an increasingly higher vacuum, such that the substrates 110 and 120 arrive at the substrate-attaching vacuum chamber 8700 in a desired vacuum state.
- the substrates 110 and 120 are aligned and conjoined in the substrate-attaching vacuum chamber 8700 using the methods described previously.
- the vacuum chamber is not any more a bottleneck of the entire process in the in-line system, allowing the substrates 110 and 120 to keep moving through the system. This improves the productivity dramatically.
- this structure can provide more prcise control because the number of vacuum chambers can be manipulated to correspond to a unit of time at each vacuum chamber that matches the time used in the other processes of the in-line system.
- a substrate-attaching unit 8000 includes, like the previous embodiment, first, second, third and fourth vacuum chambers 8300 , 8400 , 8500 and 8600 ; and a substrate-attaching vacuum chamber 8700 .
- the first, second, third and fourth vacuum chambers 8300 , 8400 , 8500 and 8600 are provided in parallel and are connected to the substrate-combination unit 6000 via the connecting units 1171 , 1172 , 1173 and 1174 , respectively, and to the substrate-attaching vacuum chamber 8700 via the connecting units 1191 , 1192 , 1193 and 1194 , respectively.
- a desired vacuum state is formed in each of the vacuum chambers 8300 , 8400 , 8500 and 8600 , and the substrates 110 and 120 are supplied to the vacuum chambers 8300 , 8400 , 8500 and 8600 from the substrate-combination unit 6000 in sequence, then they are also supplied in sequence to the substrate-attaching vacuum chamber 8700 . Accordingly, sufficient time is provided for each of the vacuum chambers 8300 , 8400 , 8500 and 8600 to provide the desired vacuum state, thereby preventing any back-up in the in-line system. In this embodiment also, the number of vacuum chambers may be adjusted as needed.
- a substrate-attaching unit 8000 can be structured to perform a variety of processes on the substrates 110 and 120 . That is, the substrate-attaching unit 8000 includes first and second compression plates 8100 and 8200 , which have at least one vacuum hole 8900 , and a support tube 8800 provided between the compression plates 8100 and 8200 , and which seals the space therebetween.
- the substrates 110 and 120 are first attached to the inner faces of the compression plates 8100 and 8200 using the methods described with reference to FIGS. 8A, 8B , 8 C or 9 A and 9 B, then air between the compression plates 8100 and 8200 is exhausted through the vacuum hole 8900 until a vacuum of 0.1 Torr or less is formed between the compression plates 8100 and 8200 .
- the air within the support tube 8800 is slowly exhausted to decrease the interval between the compression plates 8100 and 8200 until the desired cell gap between the substrates 110 and 120 is obtained.
- Infrared rays are then irradiated onto the substrates 110 and 120 to harden the sealant 150 , thereby completing the liquid crystal panel 100 of FIG. 1 .
- a plurality of vacuum holes 8900 be provided in specific areas of the first and second compression plates 8100 and 8200 , and the air is pupmped out in sequence from the vacuum holes 8900 to create the vacuum state.
- the vacuum holes 8900 may be formed at corners of the compression plates 8100 and 8200 as shown in FIG. 13A , at center portions of side edges of the compression plates 8100 and 8200 as shown in FIG.
- the vacuum holes 8900 may be formed as slits along sides of the compression plates 8100 and 8200 as shown in FIG. 13D , as slits around corners of the compression plates 8100 and 8200 as shown in FIG. 13E , or as slits both along the sides and the corners of the compression plates 8100 and 8200 with predetermined distances therebetween as shown in FIG. 13F .
- the vacuum holes 8900 be used in a sequence that is suitable for the viscosity of the liquid crystal material 132 .
- the vacuum holes 8900 described in the various shapes and positions above can be provided in both or only one of the compression plates 8100 and 8200 .
- the majority of the processes are performed on one of the substrates 110 and 120 , after which the substrates 110 and 120 are attached together. That is, the spacers are dispersed, the sealant is formed, and the liquid crystal material is deposited on only the substrate 110 . However, it is possible to disperse the spacers on one substrate then form the sealant and deposit the liquid crystal material on the other substrate. If this alternative method is used, the spacer-dispersing unit 2000 of FIG. 3 is connected between the second loading unit 7000 and the substrate-combination unit 6000 through in-line conveying units.
- the in-line system described above is designed with a single substrate-attaching unit 8000 having vacuum chambers. However, it is possible to provide a plurality of substrate-attaching units. This will be described in detail with reference to FIG. 14 .
- FIG. 14 shows a schematic view of an in-line system having a plurality of substrate-attaching units according to another embodiment of the present invention.
- the in-line system includes (a) a substrate-combination unit 6100 that is provided with the first substrate 110 , on which are deposited the sealant 150 and the liquid crystal material 132 , and the second substrate 120 , on which the spacers 140 are dispersed; and (b) a plurality of substrate-attaching units 8001 , 8002 and 8003 , which are each provided with a pair of substrates 110 and 120 for assembly from the substrate-combination unit 6100 .
- the number of substrate-attaching units can be adjusted as needed. With this configuration, the in-line system can keep operating without delays due to the relatively slow processes involved in the substrate-attaching units.
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Abstract
Disclosed is an in-line system and a method for manufacturing a liquid crystal display. The system includes a spacer-dispersing unit for dispersing spacers on one of two substrates of a mother glass, the mother glass having at least one liquid crystal cell; a sealant-applying unit for depositing a sealant on one of the two substrates; a liquid crystal depositing unit for depositing liquid crystal material on the substrate on which the sealant is deposited; and a substrate-attaching unit for receiving the two substrates from the sealant-applying unit or the liquid crystal depositing unit, then conjoining the substrates in a vacuum state. The method includes the steps of dispersing spacers on one of two substrates of a mother glass, the mother glass having at least one liquid crystal cell; depositing sealant on one of the two substrates; depositing liquid crystal material on the substrate where the sealant is deposited; and conjoining the substrates in a vacuum state to complete the manufacture of a liquid crystal panel.
Description
- (a) Field of the Invention
- The present invention relates to a system and method for manufacturing liquid crystal displays.
- (b) Description of the Related Art
- A liquid crystal display (LCD) is structured having liquid crystal material injected between two substrates. The two substrates have electrodes formed on an inner surface thereof and are joined using a sealant. A plurality of spacers are provided between the substrates to maintain a predetermined cell gap. The liquid crystal material sandwiched between the substrates is dielectrically anisotropic such that, when a voltage of a different potential is applied to electrodes of the substrates to form an electric field, the alignment of liquid crystal molecules of the liquid crystal material is varied. Accordingly, the transmittance of incident light is controlled to enable the display of images.
- To manufacture the LCD, orientation layers for orienting the liquid crystal molecules of the liquid crystal material are first provided on the substrates, and an orientation process is performed. Next, spacers are dispersed on one of the substrates, then the sealant is applied to outer edges of the substrates. The sealant is provided with a hole through which the liquid crystal material is to be injected. Following this step, the substrates are aligned then attached through a hot press process. Next, liquid crystal material is injected through the hole of the sealant, after which the hole is sealed.
- In the LCD manufacturing process, a plurality of liquid crystal cells, each for producing a single LCD, are formed from a single mother glass. Before the injection of the liquid crystal material, the mother glass is divided into 4, 6 or 8 liquid crystal cells (but not yet cut into these divisions), after which the process is continued on the individual liquid crystal cells.
- A serious drawback of the conventional LCD manufacturing process is that it is time-consuming. In particular, the injection of the liquid crystal material must be performed when the space between the substrates is kept vacuum. Both keeping vacuum while maintaining the cell gap, , and injecting the liquid crystal material through the small injection hole require substantial amounts of time. Further, since the time required for each individual process may vary according to, for example, the drive method used for a particular LCD, and since there occurs a switch during production from processes performed on the mother glass to those performed on the individual liquid crystal cells, it becomes difficult to provide production equipment for the specific processes in an in-line configuration or to automate manufacture. This substantially limits the productivity improvement. Also, while injecting the liquid crystal material, the spacers become re-positioned by the forces generated from the flow of the liquid crystal material, thereby making it difficult to obtain a uniform cell gap.
- The present invention has been made in an effort to solve the above problems.
- It is an object of the present invention to provide an in-line system for manufacturing a liquid crystal display and a method for manufacturing liquid crystal displays.
- It is another object of the present invention to simplify a method for manufacturing a liquid crystal display, and to minimize manufacturing costs and reduce the time required for manufacturing.
- The in-line system comprises a spacer-dispersing unit for dispersing spacers on one of two substrates of a mother glass, the mother glass having at least one liquid crystal cell region; a sealant-applying unit for depositing a sealant on one of the two substrates; a liquid crystal depositing unit for depositing liquid crystal material on the substrate on which the sealant is deposited; and a substrate-attaching unit for receiving the two substrates from the sealant-applying unit or the liquid crystal depositing unit, then conjoining the substrates in a vacuum state to complete a liquid crystal display panel.
- The method for manufacturing a liquid crystal display panel is also provided.
- The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention, and, together with the description, serve to explain the principles of the invention, where:
-
FIG. 1 is a plan view of a liquid crystal panel produced using an in-line system according to a preferred embodiment of the present invention; -
FIG. 2 is a sectional view taken along line II-II′ ofFIG. 1 ; -
FIG. 3 is a schematic block diagram of an in-line system for manufacturing liquid crystal displays according to a preferred embodiment of the present invention; -
FIGS. 4A and 4B are sectional views of a spacer according to a preferred embodiment of the present invention; -
FIGS. 5A and 5B are plan views of a substrate for showing the formation of a sealant when manufacturing a liquid crystal display according to a preferred embodiment of the present invention; -
FIGS. 6A, 6B and 6C are sectional views showing the sequential steps involved in hardening a sealant when manufacturing a liquid crystal display according to a preferred embodiment of the present invention; -
FIGS. 7A and 7B are views for describing the deposition of liquid crystal material when manufacturing a liquid crystal display according to a preferred embodiment of the present invention; -
FIGS. 8A, 8B , 8C, 9A, and 9B are views for describing the adhesion of a substrate on a pressure plate when manufacturing a liquid crystal display according to a preferred embodiment of the present invention; -
FIGS. 10, 11 and 12 are views showing a structure of a substrate-attaching unit in an in-line system according to different embodiments of the present invention; -
FIGS. 13A, 13B , 13C, 13D, 13E and 13F are plan views of a compression plate in a substrate-attaching unit according to a preferred embodiment of the present invention; and -
FIG. 14 is a schematic view of an in-line system having a plurality of substrate-attaching units according to another embodiment of the present invention. - Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
-
FIG. 1 shows a plan view of a liquid crystal panel produced using an in-line system according to a preferred embodiment of the present invention, andFIG. 2 shows a sectional view taken along line II-II′ ofFIG. 1 . - A
liquid crystal panel 100, which is made from a single mother glass that has undergone liquid crystal injection and substrate-attachment processes, includes a plurality of liquid crystal cells. For example, four liquidcrystal cell regions liquid crystal panel 100. Theliquid crystal panel 100 includesinsulation substrates liquid crystal layer 130, which is formed of liquid crystal material injected between thesubstrates Spherical spacers 140 are mixed in with theliquid crystal layer 130. Thespacers 140 maintain a predetermined cell gap between thesubstrates substrates sealant 150 is formed around edges of each liquid crystal cell such that theliquid crystal layer 130 is sealed between thesubstrates sealant 150. - As described above, the
liquid crystal layer 130 is injected before theliquid crystal panel 100 is divided into liquid crystal cells. The liquid crystal cells are divided along cut lines a and b, and only after completing both liquid crystal injection and substrate-attachment processes. - Wiring for transmitting electrical signals such as scanning signals and image signals may be formed on the
substrates liquid crystal panel 100. The wirings intersect to define pixel regions. Thin film transistors are formed as switching devices for controlling image signals. Pixel electrodes and a common electrode are laid to form an electric field to drive liquid crystal molecules of the liquid crystal material. And an RGB color filter is formed for displaying images. -
FIG. 3 shows a schematic block diagram of an in-line system for manufacturing liquid crystal displays according to a preferred embodiment of the present invention. - As shown in the drawing, an in-line system for manufacturing liquid crystal displays according to a preferred embodiment of the present invention includes a
first loading unit 1000, a spacer-dispersingunit 2000, a sealant-applyingunit 3000, a sealant heat-treatingunit 4000, a liquidcrystal depositing unit 5000 having aliquid crystal depositer 5100, a substrate-combination unit 6000, asecond loading unit 7000, a substrate-attachingunit 8000, and anunloading unit 9000. Provided between thefirst loading unit 1000, the spacer-dispersingunit 2000, the sealant-applyingunit 3000, the sealant heat-treatingunit 4000, the liquidcrystal depositing unit 5000, the substrate-combination unit 6000, the substrate-attachingunit 8000, and theunloading unit 9000 are in-line conveying units substrates second loading unit 7000 is connected to the substrate-combination unit 6000 through an in-line conveying unit 1160. Since thesubstrates unit 8000 in a vacuum state between thesubstrates line conveying units - Manufacturing a liquid crystal display using the in-line system above will now be described.
- First, the
substrate 110, which is loaded on thefirst loading unit 1000, is transported to the spacer-dispersingunit 2000 via the in-line conveying unit 1110. Thespacers 140 are dispersed at a predetermined density on an inner face of thesubstrate 110 at the spacer-dispersingunit 2000. At this time, it is preferable that thespacers 140 be spherical or cylindrical and have a diameter that is 10-30% greater than the desired cell gap between thesubstrates spacers 140 are simply dispersed without securing them to thesubstrate 110, external shocks or vibrations during manufacture or the flow of the liquid crystal material may displace thespacers 140 from their intended positions. This results in a non-uniform cell gap between thesubstrates spacers 140 are adhered to thesubstrate 110 after being dispersed. - With reference to
FIG. 4A , according to the present invention, thespacers 140 are coated with an adhesive 142, which is made from an epoxy group polymer. Next, infrared rays are irradiated onto thesubstrate 100 and thespacers 140 dispersed thereon such that the adhesive 142 on an upper portion of thespacers 140 melts down to fully surround a lower portion of thespacers 140, as shown inFIG. 4B . Accordingly, thespacers 140 are fixed to their positions on thesubstrate 110. Instead of dispersing thespacers 140 in this manner, it is possible to form thespacers 140 through a photolithography process. This may also include the formation of thespacers 140 in the sealant. Such an alternative process is particularly advantageous for large substrates. - Following the above, the
substrate 110 is transported from the spacer-dispersingunit 2000 to the sealant-applyingunit 3000 via the in-line conveying unit 1120. Thesealant 150 is deposited on thesubstrate 110 at the sealant-applyingunit 3000. Thesealant 150 is formed in a closed configuration, that is, thesealant 150 does not include a liquid crystal injection hole as in the prior art. Also, thesealant 150 may formed of a heat-hardening material or an infrared ray-hardening material, and may include spacers for better maintaining the cell gap between thesubstrates - Since there is no liquid crystal injection hole formed in the
sealant 150, the amount of liquid crystal material provided between the substrates is difficult to control. Too much liquid crystal material leads to damage to thesealant 150, while an insufficient amount of liquid crystal material results in areas that are not fully filled with the liquid crystal material. To solve this problem, it is preferable that a buffer region(s) is formed in thesealant 150 such that liquid crystal material fully fills display portions and any excess liquid crystal material flows into the buffer region(s). With reference toFIG. 5A , at least onebuffer region 151 is formed in thesealant 150. When the amount of liquid crystal material provided to thesubstrate 110 surpasses that needed to fill a display region c, the excess liquid crystal material flows into thebuffer region 151. As another example, with reference toFIG. 5B ,buffer regions 152, which allow the inflow of excess liquid crystal material, are formed around a circumference of the display region c. It is preferable that the amount of liquid crystal material deposited during a subsequent liquid crystal depositing process is in excess of an amount needed to fill the display region c and less than a volume defined by thesealant 150. - Next, the
substrate 110 is transported from the sealant-applyingunit 3000 to the sealant heat-treatingunit 4000 by the in-line conveying unit 1130. It is preferable that a reaction prevention layer is formed on a surface of thesealant 150 through an exposure or heat-treating process such that no reaction takes place between theliquid crystal layer 130 and thesealant 150. For this purpose, it is preferable that an infrared ray-hardening material is used for thesealant 150. During a first hardening process, thesealant 150, with reference toFIG. 6A , is divided into aportion 155 that is hardened and is comprised of the reaction prevention layer, and aportion 157 that has not been hardened. - During an initial stage of a substrate-attachment process, which is to be performed at a later point in the production process, with reference to
FIG. 6B , the reaction prevention layer of theportion 155 on the surface of thesealant 150 is pressed by the conjoining of thesubstrates FIG. 6C , infrared rays are irradiated onto thesubstrates sealant 150 is fully hardened, thereby completing the attachment of thesubstrates - Before the attachment of the
substrates substrate 110 is transported to the liquidcrystal depositing unit 5000 from the sealant heat-treatingunit 4000 via the in-line conveying unit 1140. Next, using theliquid crystal depositer 5100, predetermined amounts of the liquid crystal material are deposited such that theliquid crystal layer 130 is formed to correspond to the sizes of the liquidcrystal cell regions FIG. 7A , theliquid crystal depositer 5100 may be a syringe-type device such thatliquid crystal material 132 is provided in specific areas, that is, in the liquidcrystal cell regions liquid crystal depositer 5100 may also be a spray-type device, which includes ajig 5110 and anozzle 5120 connected to thejig 5110, which is able to provide theliquid crystal material 132 over an entire surface of the liquidcrystal cell regions FIG. 7B . - The syringe-type liquid crystal depositor device is advantageous when the
liquid crystal panel 100 of the mother glass is produced into a single liquid crystal cell. With this configuration, it is preferable that thesubstrate 110 is rotated at approximately 30-60 rpm to reduce the time required to deposit theliquid crystal material 132. However, the spray-type liquid crystal depositor has an advantage in adjusting theliquid crystal material 132 deposition. That is, the number ofnozzles 5120 as well as an application length (d) may be controlled such that the spray-type liquid crystal depositor can be used for various sizes of liquid crystal cells. - In the prior art, liquid crystal material is injected using a liquid crystal injection hole by keeping each of the liquid crystal cells vacuum. However, in the present invention, since the
liquid crystal material 132 is either dispersed or deposited while thesubstrate 110 is being rotated, the manufacturing time is substantially. Further, various time periods for liquid crystal injection in the prior art as the size of the liquid crystal cells, or the characteristics of the liquid crystal material change, which is typical depending on the drive method of the liquid crystal molecules. significantly deters overall control of the production. In the present invention, on the other hand, the time for supplying theliquid crystal material 132 to thesubstrate 110 can be fixed regardless of liquid crystal cell size and characteristics of theliquid crystal material 132, since because theliquid crystal material 132 is deposited or dispersed. - Following the processes performed in the liquid
crystal depositing unit 5000, thesubstrate 110 is transported to the substrate-combination unit 6000 via the in-line conveying unit 1150. At the same time, thesubstrate 120 loaded on thesecond loading unit 7000 is transported to the substrate-combination unit 6000 through the in-line conveying unit 1160. - Next, the two
substrates unit 8000, which is a vacuum chamber, via the in-line conveying unit 1170. Thesubstrates unit 8000, thereby completing theliquid crystal panel 100. The substrate-attachingunit 8000 includes afirst compression plate 8100 and asecond compression plate 8200, as shown inFIG. 3 . Thesubstrates compression plates compression plates substrates FIG. 2 ) dispersed on the substrate 110 (and provided in thesealant 150 in some cases) are deformed. Also resulting from the compression force, the liquid crystal material deposited on thesubstrate 110 is spread over the entire area of the liquidcrystal cell regions FIG. 1 ) to form the liquid crystal layer 130 (seeFIG. 2 ). - Subsequently, after a force is applied by the
compression plates substrates substrates sealant 150 is fully hardened. Accordingly, thesubstrates FIG. 6 . It is preferable that thesubstrates substrates - In order to mount the
substrates second compression plates FIGS. 8A, 8B and 8C,pipes 8110 mounted to the first andsecond compression plates substrates substrates inside area 8111 of thepipes 8110. Accordingly, thesubstrates - When the substrates are attached, center portions 112 and 122 respectively of the
substrates FIG. 8B , making it difficult to align thesubstrates compression plates FIG. 8C to keep the space between thecompression plates substrates - If a planar vacuum adhesion method is used, with reference to
FIGS. 9A and 9B , aplanar suction mechanism 8220 is provided on thecompression plates planar suction mechanism 8220 includes a plurality ofopenings 8221, which can be formed in a variety of shapes over the entire area of theplanar suction mechanism 8220. After contacting theplanar suction mechanism 8220 to thesubstrates openings 8221 to adhere thesubstrates compression plates substrates substrates compression plates - After the above step, the
conjoined substrates 110 and 120 (i.e., the completed liquid crystal panel 100) are transported to theunloading unit 9000 from the substrate-attachingunit 8000 through the in-line conveying unit 1180. Next, theliquid crystal panel 100 is transported to a cutting unit (not shown) where theliquid crystal panel 100 is cut into portions corresponding to theliquid crystal cells - In the manufacturing method of the present invention described above, a vacuum must be formed in order to attach the
substrates spacers 140, deposit thesealant 150 or liquid crystal material, or in the actual conjoining of thesubstrates -
FIGS. 10, 11 and 12 are views showing a structure of a substrate-attaching unit in an in-line system according to different embodiments of the present invention. Like reference numerals will be used for elements identical to those of the above embodiment. - First, with reference to
FIG. 10 , a substrate-attachingunit 8000 according to another embodiment includes first, second, third andfourth vacuum chambers units vacuum chambers vacuum chamber 8700; and a connectingunit 8040 connecting the substrate-attachingvacuum chamber 8700 to thefourth vacuum chamber 8600. - With this structure, the
substrates fourth vacuum chambers substrates vacuum chamber 8700 in a desired vacuum state. Thesubstrates vacuum chamber 8700 using the methods described previously. As a result, the vacuum chamber is not any more a bottleneck of the entire process in the in-line system, allowing thesubstrates - According to yet another embodiment, with reference to
FIG. 11 , a substrate-attachingunit 8000 includes, like the previous embodiment, first, second, third andfourth vacuum chambers vacuum chamber 8700. However, the first, second, third andfourth vacuum chambers combination unit 6000 via the connectingunits vacuum chamber 8700 via the connectingunits - With this structure, a desired vacuum state is formed in each of the
vacuum chambers substrates vacuum chambers combination unit 6000 in sequence, then they are also supplied in sequence to the substrate-attachingvacuum chamber 8700. Accordingly, sufficient time is provided for each of thevacuum chambers - Referring now to
FIG. 12 , a substrate-attachingunit 8000 can be structured to perform a variety of processes on thesubstrates unit 8000 includes first andsecond compression plates vacuum hole 8900, and asupport tube 8800 provided between thecompression plates - With this configuration, the
substrates compression plates FIGS. 8A, 8B , 8C or 9A and 9B, then air between thecompression plates vacuum hole 8900 until a vacuum of 0.1 Torr or less is formed between thecompression plates support tube 8800 is slowly exhausted to decrease the interval between thecompression plates substrates substrates sealant 150, thereby completing theliquid crystal panel 100 ofFIG. 1 . - During the formation of a vacuum between the
compression plates vacuum hole 8900, if theliquid crystal material 132 gathers at edges of thesubstrate 110, an uneven cell gap between thesubstrates vacuum holes 8900 be provided in specific areas of the first andsecond compression plates compression plates FIG. 13A , at center portions of side edges of thecompression plates FIG. 13B , or both at the corners and in center portions of the side edges of thecompression plates FIG. 13C . In addition, the vacuum holes 8900 may be formed as slits along sides of thecompression plates FIG. 13D , as slits around corners of thecompression plates FIG. 13E , or as slits both along the sides and the corners of thecompression plates FIG. 13F . - When exhausting air through the vacuum holes 8900 to form the vacuum between the
compression plates liquid crystal material 132. The vacuum holes 8900 described in the various shapes and positions above can be provided in both or only one of thecompression plates - In the in-line system and manufacturing method of an LCD using the in-line system described above, the majority of the processes are performed on one of the
substrates substrates substrate 110. However, it is possible to disperse the spacers on one substrate then form the sealant and deposit the liquid crystal material on the other substrate. If this alternative method is used, the spacer-dispersingunit 2000 ofFIG. 3 is connected between thesecond loading unit 7000 and the substrate-combination unit 6000 through in-line conveying units. - Further, the in-line system described above is designed with a single substrate-attaching
unit 8000 having vacuum chambers. However, it is possible to provide a plurality of substrate-attaching units. This will be described in detail with reference toFIG. 14 . -
FIG. 14 shows a schematic view of an in-line system having a plurality of substrate-attaching units according to another embodiment of the present invention. - As shown in the drawing, the in-line system includes (a) a substrate-
combination unit 6100 that is provided with thefirst substrate 110, on which are deposited thesealant 150 and theliquid crystal material 132, and thesecond substrate 120, on which thespacers 140 are dispersed; and (b) a plurality of substrate-attachingunits substrates combination unit 6100. The number of substrate-attaching units can be adjusted as needed. With this configuration, the in-line system can keep operating without delays due to the relatively slow processes involved in the substrate-attaching units. - Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that many variations and/or modifications of the basic inventive concepts herein taught which may appear to those skilled in the present art will still fall within the spirit and scope of the present invention, as defined in the appended claims.
Claims (11)
1-55. (canceled)
56. A method for manufacturing liquid crystal displays, comprising steps of:
forming a spacer on a first substrate or a second substrate;
depositing a sealant on the first substrate;
exposing the sealant to an ultraviolet ray to partially harden the sealant;
depositing liquid crystal on the first substrate;
conjoining the first substrate and the second substrate in a vacuum state; and
fully hardening the sealant.
57. The method of claim 56 , wherein the ultraviolet ray exposed to the sealant forms a reaction-prevention layer on a surface portion of the sealant.
58. The method of claim 56 , wherein the steps of forming the spacer, depositing the sealant, depositing the liquid crystal, conjoining the first substrate and the second substrate, and fully hardening the sealant are performed as in-line processes.
59. The method of claim 58 , the spacer is formed on the first substrate.
60. The method of claim 56 , wherein the first substrate and the second substrate are conjoined while gradually forming the vacuum.
61. The method of claim 56 , wherein the step of conjoining the first substrate and the second substrate includes steps of:
aligning the first substrate and the second substrate; and
applying a predetermined force to the first substrate and the second substrate toward each other such that the substrates are attached by the sealant.
62. The method of claim 56 , wherein the step of conjoining the first substrate and the second substrate comprises steps of:
aligning the first substrate and the second substrate;
forming a vacuum state between the first substrate and the second substrate;
reducing a space between the first substrate and the second substrate by controlling the vacuum state; and
applying a predetermined force to the first substrate and the second substrate toward each other such that the substrates are attached by the sealant.
63. The method of claim 56 , wherein the liquid crystal is deposited over an entire surface of a liquid crystal cell of the first substrate, the liquid crystal cell being surrounded by the sealant.
64. The method of claim 56 , wherein the sealant is deposited in a closed loop.
65. The method of claim 56 , further comprising a step of forming a buffer region to hold an excessive portion of the liquid crystal.
Priority Applications (1)
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US11/028,642 US20050117107A1 (en) | 2000-04-20 | 2005-01-05 | In-line system and a method for manufacturing a liquid crystal display |
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KR2000-21079 | 2000-04-20 | ||
US09/838,385 US6657701B2 (en) | 2000-04-20 | 2001-04-20 | In-line system and a method for manufacturing a liquid crystal display with special vacuum/force control |
US10/602,053 US20040012755A1 (en) | 2000-04-20 | 2003-06-24 | In-line system and a method for manufacturing a liquid crystal display |
US11/028,642 US20050117107A1 (en) | 2000-04-20 | 2005-01-05 | In-line system and a method for manufacturing a liquid crystal display |
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US11/028,642 Abandoned US20050117107A1 (en) | 2000-04-20 | 2005-01-05 | In-line system and a method for manufacturing a liquid crystal display |
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US10/602,053 Abandoned US20040012755A1 (en) | 2000-04-20 | 2003-06-24 | In-line system and a method for manufacturing a liquid crystal display |
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US10/878,395 Abandoned US20040233380A1 (en) | 2000-04-20 | 2004-06-29 | In-line system and a method for manufacturing a liquid crystal display |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110274848A1 (en) * | 2009-01-06 | 2011-11-10 | Sharp Kabushiki Kaisha | Ejection device and droplet disposition method |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4598641B2 (en) * | 2000-11-30 | 2010-12-15 | 富士通株式会社 | Bonded substrate manufacturing system |
JP3742000B2 (en) | 2000-11-30 | 2006-02-01 | 富士通株式会社 | Press machine |
TW500949B (en) * | 2000-12-26 | 2002-09-01 | Quanta Display Inc | Device and flow for in-line operation of liquid crystal display |
KR100490048B1 (en) * | 2001-06-19 | 2005-05-17 | 삼성전자주식회사 | In-line system for manufacturing liquid crystal display and method of manufacturing liquid crystal display using the same |
KR100816341B1 (en) * | 2001-11-09 | 2008-03-24 | 삼성전자주식회사 | System for manufacturing liquid crystal display and method for manufacturing the display |
US6784970B2 (en) * | 2002-02-27 | 2004-08-31 | Lg.Philips Lcd Co., Ltd. | Method of fabricating LCD |
KR100606966B1 (en) * | 2002-03-06 | 2006-08-01 | 엘지.필립스 엘시디 주식회사 | Production line of Liquid Crystal Display Device |
KR100652050B1 (en) * | 2002-03-20 | 2006-11-30 | 엘지.필립스 엘시디 주식회사 | Liquid Crystal Display Device and Method of manufacturing the same |
KR100698040B1 (en) * | 2002-06-14 | 2007-03-23 | 엘지.필립스 엘시디 주식회사 | Portable jig |
KR100841630B1 (en) | 2002-08-22 | 2008-06-27 | 엘지디스플레이 주식회사 | Full in-line structure of liquid crystal display device and fabricating method using thereof |
KR100895306B1 (en) * | 2002-11-14 | 2009-05-07 | 삼성전자주식회사 | A panel for a liquid crystal display |
KR100720449B1 (en) * | 2002-11-18 | 2007-05-22 | 엘지.필립스 엘시디 주식회사 | manufacturing of liquid crystal display |
KR100920347B1 (en) * | 2002-12-04 | 2009-10-07 | 삼성전자주식회사 | Manufacturing method of liquid crystal display |
JP3994915B2 (en) * | 2003-05-22 | 2007-10-24 | セイコーエプソン株式会社 | Electro-optical panel manufacturing method, electro-optical panel manufacturing program, electro-optical panel manufacturing apparatus, and electronic apparatus manufacturing method |
JP4190472B2 (en) * | 2004-07-28 | 2008-12-03 | シャープ株式会社 | Manufacturing method and manufacturing apparatus of liquid crystal display element |
WO2006019032A1 (en) * | 2004-08-17 | 2006-02-23 | Matsushita Electric Industrial Co., Ltd. | Plasma display panel and method for manufacturing same |
KR20060029530A (en) * | 2004-10-02 | 2006-04-06 | 삼성전자주식회사 | In-situ apparatus for heat-treating of a liquid crystal panel, and cooling device employed to the in-situ apparatus |
TWI327236B (en) * | 2004-11-29 | 2010-07-11 | Au Optronics Corp | Spacer and liquid crystal display panel employing thereof |
JP2006171722A (en) * | 2004-11-30 | 2006-06-29 | Barco Nv | Color display, multi-display system, adjustment device, and method for setting and/or adjusting the color display |
KR20070023958A (en) * | 2005-08-25 | 2007-03-02 | 삼성전자주식회사 | Cutting system and cutting method for liquid crystal display panel |
US20070199904A1 (en) * | 2006-02-27 | 2007-08-30 | Jonathan Thompson | Methods for treatment of organic matter in liquid |
KR101284943B1 (en) * | 2006-06-30 | 2013-07-10 | 엘지디스플레이 주식회사 | Method for fabricating mold |
JP2008158237A (en) | 2006-12-22 | 2008-07-10 | Lg Display Co Ltd | Manufacturing method of liquid crystal display device |
KR20110106082A (en) * | 2010-03-22 | 2011-09-28 | 삼성모바일디스플레이주식회사 | Liquid crystal display device and the manufacturing method thereof |
KR101270699B1 (en) * | 2010-06-22 | 2013-06-03 | 엘지디스플레이 주식회사 | Apparatus for Manufacturing Liquid Crystal Diplay Panel |
CN105629528A (en) * | 2016-01-08 | 2016-06-01 | 武汉华星光电技术有限公司 | Display device and assembling method thereof |
KR101896781B1 (en) * | 2016-10-14 | 2018-09-07 | 현대자동차주식회사 | Liquid crystal-based film type smart window and the method for same |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4647157A (en) * | 1984-12-04 | 1987-03-03 | Polaroid Corporation | Fluoroelastomeric sealants for liquid crystal cells |
US4838656A (en) * | 1980-10-06 | 1989-06-13 | Andus Corporation | Transparent electrode fabrication |
US5128784A (en) * | 1989-03-23 | 1992-07-07 | Seiko Epson Corporation | Active matrix liquid crystal display device and method for production thereof |
US5461502A (en) * | 1994-04-06 | 1995-10-24 | Beldex Corporation | Method and apparatus for feeding liquid crystal with a rotatable support means |
US5490004A (en) * | 1994-05-02 | 1996-02-06 | Hughes Jvc Tech Corp | Photoconductivity reduction in cadmium telluride films for light blocking applications using nitrogen incorporation |
US5978065A (en) * | 1996-11-08 | 1999-11-02 | Sony Corporation | Liquid crystal device and manufacturing method and apparatus therefor |
US6055035A (en) * | 1998-05-11 | 2000-04-25 | International Business Machines Corporation | Method and apparatus for filling liquid crystal display (LCD) panels |
US6219126B1 (en) * | 1998-11-20 | 2001-04-17 | International Business Machines Corporation | Panel assembly for liquid crystal displays having a barrier fillet and an adhesive fillet in the periphery |
US6222603B1 (en) * | 1998-01-13 | 2001-04-24 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing liquid crystal display device with a double seal |
US6680759B2 (en) * | 2000-06-14 | 2004-01-20 | Fujitsu Hitachi Plasma Display Limited | Electrode structure of display panel and electrode forming method using dummy electrode |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2394293A (en) * | 1940-11-08 | 1946-02-05 | Deem Arden Garrell | Means for effecting material and heat transfer |
JPS56114928A (en) * | 1980-02-18 | 1981-09-09 | Seiko Instr & Electronics Ltd | Orientation processing method for liquid-crystal panel |
JPH04271320A (en) | 1991-02-27 | 1992-09-28 | Ii & S:Kk | Apparatus for producing liquid crystal display |
JP3159504B2 (en) * | 1992-02-20 | 2001-04-23 | 松下電器産業株式会社 | Liquid crystal panel manufacturing method |
JPH05307160A (en) | 1992-04-30 | 1993-11-19 | Ricoh Co Ltd | Apparatus and method for production of liquid crystal display element |
JPH07181507A (en) * | 1993-12-21 | 1995-07-21 | Canon Inc | Liquid crystal display device and information transmission device having the liquid crystal display device |
JPH08211351A (en) | 1995-02-03 | 1996-08-20 | Hitachi Ltd | Liquid crystal display panel and production thereof |
US5898041A (en) * | 1995-03-01 | 1999-04-27 | Matsushita Electric Industrial Co., Ltd. | Production process of liquid crystal display panel, seal material for liquid crystal cell and liquid crystal display |
JP3059360B2 (en) * | 1995-06-28 | 2000-07-04 | シャープ株式会社 | Liquid crystal panel manufacturing method and manufacturing press device |
JP3088960B2 (en) | 1996-10-22 | 2000-09-18 | 松下電器産業株式会社 | Manufacturing method of liquid crystal display element |
US5888679A (en) * | 1997-03-27 | 1999-03-30 | Canon Kabushiki Kaisha | Production process of color filter, color filter produced thereby and liquid crystal display device using such color filter |
JPH10301122A (en) | 1997-04-25 | 1998-11-13 | Matsushita Electric Ind Co Ltd | Method of manufacturing liquid crystal display element |
JPH11109388A (en) | 1997-10-03 | 1999-04-23 | Hitachi Ltd | Production of liquid crystal display device |
KR100487258B1 (en) * | 1998-01-23 | 2005-07-11 | 엘지.필립스 엘시디 주식회사 | Automation System for Large Area Liquid Crystal Display and Its Implementation Method |
KR20010064330A (en) * | 1999-12-29 | 2001-07-09 | 구본준, 론 위라하디락사 | Method Of Fabricating Liquid Crystal Display Device |
KR100816341B1 (en) | 2001-11-09 | 2008-03-24 | 삼성전자주식회사 | System for manufacturing liquid crystal display and method for manufacturing the display |
CN100456088C (en) | 2002-02-05 | 2009-01-28 | 乐金显示有限公司 | LCD adhesion machine and method for producing LCD with the same adhering machine |
KR100847816B1 (en) | 2002-03-25 | 2008-07-23 | 엘지디스플레이 주식회사 | Vacuum bonding device for liquid crystal display |
KR100720422B1 (en) | 2002-11-15 | 2007-05-22 | 엘지.필립스 엘시디 주식회사 | Apparatus for manufacturing liquid crystal display device and method for manufacturing liquid crystal display devide using the same |
-
2000
- 2000-04-20 KR KR1020000021079A patent/KR100656906B1/en active IP Right Grant
-
2001
- 2001-04-17 JP JP2001118140A patent/JP4854127B2/en not_active Expired - Lifetime
- 2001-04-20 US US09/838,385 patent/US6657701B2/en not_active Expired - Lifetime
-
2003
- 2003-06-24 US US10/602,053 patent/US20040012755A1/en not_active Abandoned
- 2003-06-24 US US10/602,054 patent/US8582074B2/en active Active
-
2004
- 2004-06-29 US US10/878,395 patent/US20040233380A1/en not_active Abandoned
-
2005
- 2005-01-05 US US11/028,642 patent/US20050117107A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4838656A (en) * | 1980-10-06 | 1989-06-13 | Andus Corporation | Transparent electrode fabrication |
US4647157A (en) * | 1984-12-04 | 1987-03-03 | Polaroid Corporation | Fluoroelastomeric sealants for liquid crystal cells |
US5128784A (en) * | 1989-03-23 | 1992-07-07 | Seiko Epson Corporation | Active matrix liquid crystal display device and method for production thereof |
USRE35416E (en) * | 1989-03-23 | 1996-12-31 | Seiko Epson Corporation | Active matrix liquid crystal display device and method for production thereof |
US5461502A (en) * | 1994-04-06 | 1995-10-24 | Beldex Corporation | Method and apparatus for feeding liquid crystal with a rotatable support means |
US5490004A (en) * | 1994-05-02 | 1996-02-06 | Hughes Jvc Tech Corp | Photoconductivity reduction in cadmium telluride films for light blocking applications using nitrogen incorporation |
US5978065A (en) * | 1996-11-08 | 1999-11-02 | Sony Corporation | Liquid crystal device and manufacturing method and apparatus therefor |
US6222603B1 (en) * | 1998-01-13 | 2001-04-24 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing liquid crystal display device with a double seal |
US6055035A (en) * | 1998-05-11 | 2000-04-25 | International Business Machines Corporation | Method and apparatus for filling liquid crystal display (LCD) panels |
US6219126B1 (en) * | 1998-11-20 | 2001-04-17 | International Business Machines Corporation | Panel assembly for liquid crystal displays having a barrier fillet and an adhesive fillet in the periphery |
US6680759B2 (en) * | 2000-06-14 | 2004-01-20 | Fujitsu Hitachi Plasma Display Limited | Electrode structure of display panel and electrode forming method using dummy electrode |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110274848A1 (en) * | 2009-01-06 | 2011-11-10 | Sharp Kabushiki Kaisha | Ejection device and droplet disposition method |
US8794180B2 (en) * | 2009-01-06 | 2014-08-05 | Sharp Kabushiki Kaisha | Ejection device and droplet disposition method |
Also Published As
Publication number | Publication date |
---|---|
US20040012755A1 (en) | 2004-01-22 |
US6657701B2 (en) | 2003-12-02 |
JP4854127B2 (en) | 2012-01-18 |
KR100656906B1 (en) | 2006-12-15 |
KR20010097212A (en) | 2001-11-08 |
US20020154266A1 (en) | 2002-10-24 |
US8582074B2 (en) | 2013-11-12 |
JP2001356313A (en) | 2001-12-26 |
US20040233380A1 (en) | 2004-11-25 |
US20040100609A1 (en) | 2004-05-27 |
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