TWI298413B - - Google Patents

Description

0) 0) 1298413 A (Description of the invention should be stated: the technical field, prior art, content, embodiment and drawing of the invention) TECHNICAL FIELD The present invention relates to a device for combining display panels and using the same A method of manufacturing a display device, in particular, a device for mutually combining two panels of a display and a method for manufacturing a display device using the same. Prior Art In general, a display device (particularly a liquid crystal display) includes a second panel having electrodes and a liquid crystal material injected between the two panels. Further, the periphery of the two panels is printed, and when the liquid crystal material is sealed, the two are sealed to each other by a sealant. A spacer is diffused between the two panels to support it. In the liquid crystal display, an electric field is applied to the liquid crystal material injected between the two panels, and dielectric anisotropy is provided by the electrodes. By controlling the intensity of the electric field, the transmission of light through the panel is controlled to display the desired image. Further, the two panels are printed on the periphery of the two panels, and the two panels are combined with each other by a sealant when sealing the liquid crystal material. In a method of fabricating a liquid crystal display, an alignment film for aligning liquid crystal molecules of a liquid crystal material is applied over the two panels and aligned according to the alignment film. The spacer is spread around one of the panels, and a sealant having a liquid crystal injection hole is printed around the panel. The two panels are aligned and adhered to each other by a hot press. The liquid crystal material is injected between the two panels by the liquid crystal, and the liquid crystal injection hole is sealed to form a 1298413

The hole is injected into the liquid crystal cell. In the crucible method, the distance between the two panels becomes a key factor in determining the driving characteristics of the display device and its color display characteristics. Therefore, it is important to develop a technique for uniformly maintaining the distance between the two panels in a constant manner. The distance between the two panels in a liquid crystal display is usually 3 to 5 micrometers, and there are tolerances of 0.2 to 3 micrometers. In the case where the distance between the two panels is extremely small, or in the case of manufacturing a small liquid crystal display, the tolerance is preferably limited to 0.1 micron. ...: In some hot presses, a compression plate is attached to each panel, and while the two panels are pressurized, they are heated to adhere to each other. The machine can tolerate tens of micrometers (pm) of error. To compensate for this error, the hot press is made such that a sheet having a pad adheres to one side of the pressure plate to contact the panel. However, in order to improve the productivity of the current method of manufacturing a liquid crystal display in which a plurality of unit panel fittings (referred to as "liquid crystal cells" are composed of a mother glass), it is necessary to increase the size of the mother glass, but when When the size of the mother glass increases, the error associated with the hot press becomes more serious. Therefore, in the presence of 塾-based sheets, the possible errors in compensation can be limited. SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for combining display panels that can control the distance between panels in a precise manner and to provide a method of fabricating a display device using the device. 1298413

(3) This and other objects can be attained by a display panel assembly and a method of manufacturing a display device using the same, wherein an atmospheric difference is created to pressurize the panel to complete the liquid crystal panel assembly. Specifically, the display panel assembly includes a chamber having an airtight space and the first and second platforms are mounted within the chamber to support the display panels while being parallel to each other. A vacuum unit is mounted outside the chamber to evacuate the chamber with a pump to bring the chamber to a vacuum. A gas supply unit is installed outside the chamber to input air into the chamber. The vacuum unit can control the degree of vacuum of the chamber to be in the range of 1 Torr to 1 Torr. 5 Torr. The gas supply unit controls the gas pressure of the chamber within a range of 36 Torr to 2 ATM. The air introduced into the chamber by the air supply unit is heated. The display panel assembly may further comprise a thermal hardening unit for heating the first and second platforms, or an ultraviolet hardening unit mounted in the chamber to illuminate the ultraviolet light. The display panel assembly device may further include: a first support installed at a bottom inner wall of the chamber to support the first platform; and a top inner wall installed at the top of the chamber to support the second platform a second support; a position sensing unit mounted in the room to sense the position of the display panel and mounted on the outdoor portion to support an alignment platform of the second platform in the chamber when the panel is carried. In the method of manufacturing a display device having two panels using the display panel assembly, a spacer is formed on one of the two panels. A sealant is formed on one of the two panels. The two panels are moved to a panel combination 1298413

(4) In the room. The chamber is evacuated to a vacuum. The space enclosed by the two panels and the sealant is sealed by tightly adhering the two panels under vacuum. Air is introduced into the chamber, and the panels are pressurized by air pressure to cause the panels to adhere to each other. In the step of forming the sealant, a first sealant having a liquid crystal injection hole may be formed, and a second sealant may be formed around the first sealant, which has a closed curve shape. The method of the method may further comprise: aligning the two panels with each other and hardening the sealant. The sealant is composed of a thermosetting material or an ultraviolet curable material, and is hardened by using a thermosetting unit or an ultraviolet irradiation unit attached to the inside or the outside of the chamber. There may be a supporting resin formed on the outside of the sealant on one of the two panels to fix the position of the two panels. In the vacuum state forming step, the vacuum degree of the chamber reaches 10 to 10 E·5 Torr. The pressure is input to the chamber so that the pressure of the air adhering to the panels is controlled within a range of 360 Torr to 2 ATM. Embodiments Hereinafter, a device for combining display panels according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The method of fabricating a display device using the device allows a person skilled in the art to readily implement various embodiments. First, the structure of a liquid crystal panel assembly manufactured using the display panel assembly will be described. 1 is a plan view showing a liquid crystal panel assembly manufactured by using a liquid crystal panel assembly device according to a preferred embodiment of the present invention 1298413

(5) For example, Fig. 2 is a cross-sectional view of the liquid crystal panel assembly taken along the line of Fig. 2; The structure of the liquid crystal panel assembly after the panel assembly process is completed is illustrated in the drawing. As shown in FIGS. 1 and 2, a mother glass-based liquid crystal panel assembly 1 has two face-to-face panels 110 and 12, and spacers 15 disposed between the two panels 11 and 120. The two panels can be spaced apart from each other by a predetermined distance. The liquid crystal panel assembly 100 has a plurality of liquid crystal cells. For example, as shown in Fig. 1, the liquid crystal panel assembly 1 has four liquid crystal cell regions A, B, C, and D. The liquid crystal material (not shown) to be injected between the two panels 11 〇 and ι 2 在 in the liquid crystal injection process is sealed by a first sealant 13 ,, and the first sealant is formed on the second panel 11 〇 And 12 〇 around, and each liquid crystal cell has a liquid crystal injection hole 131. A sealant 14 is formed around the first sealant 130 and has a closed curve shape, so that the space enclosed by the two panels 110 and 12〇 and the second sealant ι4〇 is in the panel assembly process. Vacuum state. The first or second encapsulant 13 〇 or 14 〇 may comprise spacers that support the two panels 11 〇 and 12 以 in a parallel manner. In the method of manufacturing a liquid crystal display according to a preferred embodiment of the present invention, the liquid crystal panel assembly 1 is divided into a plurality of units along a broken line a after the panel assembly process is completed. A plurality of signal lines </ RTI> for carrying electrical signals (e.g., scanning signals or image signals) are formed at the panels 110 and 120 of the liquid crystal panel assembly, while &quot;Hai and other lines cross each other&apos; to define a pixel area. Switching circuit to control image k旒, pixel film transistor and common electrode for forming electric field to drive liquid crystal molecules, and red, green and blue color filter for displaying image 1298413

Further formed at the panels 110 and 120. The structure of the display panel assembly used in the process of manufacturing a liquid crystal display will be described in detail below. Figure 3 is a block diagram of a display panel assembly apparatus in accordance with a preferred embodiment of the present invention. As shown in FIG. 3, the display panel assembly includes: a chamber 23〇 having an airtight space; first and second platforms 210 and 220 installed in the chamber 230 and facing each other to support the panel 11 ( ) with 12 baht. The first and second platforms 210 and 220 parallel the positions of the two panels 11〇 and 12〇. A vacuum pump 270 is located outside the chamber 230 so that the internal space of the chamber 230 can be vacuumed by suction. A gas supply unit 280 is also located outside of the chamber 23 to introduce air into the chamber 230. The vacuum pump 270 can control the degree of vacuum of the chamber 230 in the range of 10 to 10E - 5 Torr during the panel assembly process. Preferably, the air supply unit 28 is capable of controlling the air pressure of the chamber 230 within a range of 36 to 2 ATM during the panel assembly process. Further, the display panel device includes: a first support Mo, The system is mounted on the bottom inner wall of the chamber 230 for supporting the first platform 21A, and a second support 260 is mounted on the top inner wall of the chamber 23〇 for supporting the second platform 220. The position sensor 250 is mounted in the chamber 230 to sense the position of the panels 110 and 120 such that the two panels 11 and 12 are aligned with each other. An alignment platform 240 is located outside the chamber 230 for the second support The second platform 220 in the 260 floor room 230. The alignment platform 240 can control the second platform 220 to control the position of the upper panel 12〇, so that the second panel-12-1298413

(7) 110 and 120 are aligned with each other. As shown in Fig. 3, the second support 26'' is preferably tubular so that the second platform 220 can be moved in various directions by the alignment platform 240 while maintaining the vacuum or air pressure of the chamber 230. A method of manufacturing a liquid crystal display using the display panel assembly will be described in detail below. 4A to 4D sequentially illustrate the steps of combining panels in the manufacture of a liquid crystal display. First, in the method of manufacturing a liquid crystal display of the present invention, an alignment film is applied to each of the panels 110 and 120 (as shown in FIG. 1) so that liquid crystal molecules of the liquid crystal material are aligned in a predetermined direction and rubbed by friction. Or light irradiation for alignment. A spacer 150 (shown in Figure 1) is sprayed onto one of the panels 11A and 12A such that they are spaced apart by a predetermined distance. A first encapsulant 130 having a liquid crystal injection hole 13 i (shown in FIG. 1 ) is printed around the panel 11 , and a second encapsulant 140 (shown in FIG. 1 ) is attached to the first encapsulant 13 . Print around. The second encapsulant 140 has a closed curve shape such that the space enclosed by the two panels u 〇 and 120 and the second encapsulant 14 处于 is in a vacuum state in a subsequent panel assembly procedure. The first and second sealant systems 13A and 140 are composed of a thermosetting material or an ultraviolet curable material. Then, as shown in FIG. 4A, the lower and upper panels 11〇 and 12〇 are moved into the chamber 230 (shown in FIG. 3) and installed on the first and second platforms 21 and 220 (as shown in FIG. 3 3)). The chamber 23 is evacuated by a vacuum pump 270 (shown in Figure 1) to be in a vacuum state. The vacuum of the chamber 230 is maintained at 1 Torr to 10E-5 Torr. As shown in FIG. 4B, the alignment keys of the two panels 11〇 and 120 are detected by a 1298413

The device 250 (shown in Figure 3) senses while maintaining the chamber 230 in a vacuum state. The upper panel 120 is provided in an horizontal and vertical arrow direction using an alignment platform 240 (shown in Figure 1) such that the two panels 11 and 12 are aligned with one another. As shown in FIG. 4C, when the chamber 230 is maintained in a vacuum state, the second platform 22 is oriented toward the first platform 210 such that the upper panel 120 abuts the lower panel 11 〇 while contacting the second sealant 140. . In this way, the space enclosed by the two panels u 〇 and 120 and the second sealant 140 can be sealed. When the space enclosed by the second panel 11 〇 and 120 and the second sealant 140 is sealed, the pressing of the upper panel 12 并 does not form a distance between the units, but is caused by the second sealant 14 The lower panel 11 is in contact with the lower panel 11 〇. Therefore, the pressurization of the upper panel 12A is preferably 0.5 ATM or less. As shown in Fig. 4D, air is introduced into the chamber 230 by the air supply unit 280 (shown in Fig. 3), thereby breaking the vacuum state of the chamber 230. Preferably, the air supply unit 280' is controlled to maintain the internal pressure of the chamber 230 within a range of 360 Torr to 2 ATM. The air supply is performed after the second platform 220 is separated from the upper panel 120 or prior to separation. At this time, the space surrounded by the two panels 11〇 and 12〇 and the second sealant 14〇 is maintained in a vacuum state, and in the region other than the space in the chamber 23〇, the pressure system is maintained at 360 Torr to 2 within the scope of ATM. Therefore, the space enclosed by the two panels 110 and 120 and the second sealant 140 has an atmospheric difference from the inner region of the chamber 230 other than the space. For this reason, after receiving the pressure of 360 Torr to 2 ATM from the outside, the two panels ι 10 and 120 can be uniformly pressurized to make the distance between them reach the desired size, thereby making them adhere to each other. Then, as shown in FIG. 1, the first and second sealants 13〇 and 14〇 are tied into -14-1298413

(9) Heat treatment or irradiation with ultraviolet rays for hardening. The two panels 110 and 12 are combined to form a liquid crystal panel assembly 100. In the case where the first and second sealants i 30 and 140 are composed of a thermosetting material, the two panels 110 and 12 are adhered to each other by moving them to the outside of the chamber 230, and It is heated to 50 to 200 degrees Celsius using a separate thermosetting unit such as a furnace or a hot plate. Alternatively, a separate thermal hardening unit can be installed in chamber 230 to allow panels 110 and 120 to adhere to one another. In addition, in the case where the first and second sealants 130 and 140 are composed of a thermosetting material, the air heated to 5 〇 to 2 〇〇 Celsius is supplied by a gas supply unit 280 (see FIG. 3). The input) is input into the chamber 230 to break the vacuum state in the chamber 230 (except for the space enclosed by the two panels 110 and 12 and the second sealant ι4 。). Therefore, the hot air entering the chamber 230 adheres the two panels 11 and 12 to each other by the air pressure, so that the distance between the panels 110 and 12 is the desired size. The first and second encapsulants 13A and 140 are thermally hardened to complete the liquid crystal panel assembly 1 (as shown in Fig. 1). The air supply unit 280 may include an air heater for supplying heated air. Further, in the case where the first and second sealants 13 and HO are both composed of a thermosetting material, the panels 110 and 120 are heated by the first and second stages 21A and 220. . Therefore, the panels 11 and 120 are adhered to each other by air pressure so that the distance between them reaches a desired size. The first and second encapsulants 130 and 140 are thermally hardened to complete the liquid crystal panel assembly 100 (shown in Figure 1). The display panel assembly of the present invention may include a thermal hardening unit for the first and second platforms 21 -15 - 1298413

(10) and 220 are heated. Further, in the step of breaking the vacuum state of the chamber 230, in the step of adhering the panels 110 and 120 by air pressure, in order to prevent the two panels 11 and 12 from deviating from each other, as shown in FIG. 5, the supporting resin 17 may be separately used. The outer periphery of the second sealant 140 is formed, and the support resin has an ultraviolet curing material. The support resin 170 is formed at one of the panels 110 and 120 before the panels 110 and 120 are moved into the chamber 230. At this time, as described above, after the two panels 110 and 120 are aligned and fixed to an appropriate position by using the supporting resin 170, the panels 110 and 12 and the second sealant 14 can be sealed. Space, at the same time, the panels 11〇 and 12〇 are adhered to each other. The display panel assembly of the present invention may further include an ultraviolet irradiation unit that is mounted in the chamber 230. The supporting resin no can be hardened by ultraviolet rays, and thereby the two panels 110 and 120 are fixed, which prevents the two panels 110 and 120 from being aligned with each other due to the deviation in one step, which is: breaking the vacuum state The panels 110 and 120 are adhered to each other by air pressure, the liquid crystal panel assembly 100 is moved from the inside of the chamber 230 to the outside thereof, or the panels 110 and 120 are combined with each other by hardening the first sealant 130. Further, the second sealant 140 is composed of an ultraviolet curable material. At this time, as described above, the second encapsulant 14 硬化 can be hardened by ultraviolet rays, and thereby sealing the space enclosed by the panels 110 and 120 and the second encapsulant 140 while aligning the two panels 110 and 120, and fixed in place, then the two panels 110 and 120 are adhered to each other. The display panel assembly of the present invention may further include an ultraviolet irradiation unit that is mounted in the chamber 230. In this way, as described above, in making the two panels ι1〇 1298413

In the step of combining (9) and 120 with each other, it is possible to prevent the two panels 11 and 12 from being combined with each other due to the deviation. Meanwhile, after the liquid crystal panel assembly 100 is completed by combining the two panels 11A and 12A with each other, the second encapsulant 140 can be hardened by irradiating ultraviolet rays while hardening the first seal by heating. Agent 130. At the same time, the first and second sealants 13A and 140 may be composed of an ultraviolet ray-irradiating material. In this case, the second encapsulant 14〇 is locally hardened by ultraviolet irradiation, and thereby the two panels [1〇 and 12〇 are aligned with each other and fixed in an appropriate position, and then the panels can be sealed. 11 〇 and 12 〇 and the space enclosed by the second sealant 140, while the two panels 110 and 120 are adhered to each other by atmospheric difference. Finally, by first irradiating the ultraviolet rays, the first and second encapsulants 13 and 14 are hardened by τ, and they are adhered to each other, thereby completing a liquid crystal panel 1 (shown in FIG. The display panel assembly of the present invention may further include an ultraviolet irradiation unit that is mounted in the chamber 230. In this case, in the step of combining the two panels 110 and 120, the two panels 11 and 12 are prevented from being aligned with each other due to the deviation. Therefore, in the display panel assembly of the present invention, the display panels are combined with each other using the air pressure generated by the difference in the atmosphere, so that the distance between the panels such as ? can be accurately controlled to have an allowable error of U micrometers or less. Although the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood by those skilled in the art that the invention can be modified and substituted without departing from the spirit of the invention as set forth in the scope of the π patent attached to Fan threat. Of course (12) (12) 1298413

And the present invention and its accompanying numerous advantages can be fully understood in conjunction with the drawings and with reference to the above detailed description. The same reference numerals in the drawings denote the (four) or similar components, and wherein: FIG. 1 is a plan view showing a liquid crystal panel assembly manufactured using a liquid crystal panel assembly, which is a comparison according to the present invention. 2 is a cross-sectional view of a liquid crystal panel assembly taken along line Π-Π' of FIG. 1, and FIG. 3 is a schematic structural view of a liquid crystal panel assembly apparatus according to a preferred embodiment of the present invention. 4A to 4D are diagrams illustrating a step of combining two display panels with each other in a method of manufacturing a liquid crystal display, and a plan view of FIG. 5 illustrating a comparison according to the present invention, in accordance with a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a method of manufacturing a liquid crystal display, a position of a supporting resin formed on one side of a board. Schematic representation symbol 100 liquid crystal panel fitting 110 panel 120 panel 130 first sealant 131 liquid crystal injection hole -18-1298413 (13) 140 second sealant 150 spacer 170 branch resin 210 first platform 220 second platform 230 Room 240 alignment platform 250 position sensor 260 second support 270 vacuum pump 280 gas supply unit 290 first support A, B, C, D liquid crystal cell area

-19-

Claims (1)

1298413 Let η plastic i mu Scope of Patent Application 1. A method for manufacturing a display device, the method comprising the steps of: forming a support on one of two display panels; providing a spacer on one of the two display panels; Forming a first sealant on one of the two display panels and forming a second sealant around the first sealant, having a closed loop shape; on one of the two display panels Forming a supporting resin on the outside of the first sealing agent and the second sealing agent to fix the positions of the two display panels; moving the two display panels to a panel combination room by using the first and second platforms, the first The first platform and the second platform respectively install the two display panels to evacuate the chamber; when aligning the two display panels, sensing the positions of the two display panels; moving one of the platforms toward another platform by moving under vacuum Until the other of the two display panels contacts the second sealant to seal a space enclosed by the two display panels and the first sealant and the second sealant; input air into the chamber while Pressurizing the two display panels by air pressure to adhere the two display panels to each other; and hardening the first sealant and the second sealant. -20- 1298413 2·If you apply for the first item of patent scope, you can only go to the top, and the first sealant and the first sealant contain a thermosetting material or a UV hardening material, and the first one is The sealant and the second sealant are hardened using a thermal hardener or an ultraviolet irradiation unit installed inside or outside the chamber. 3. The method of claim 1, wherein the vacuum degree of the chamber is 10 to 1 〇Ε·5 τ 当 when the chamber is in a vacuum state. 4. The method of claim 1, wherein the air pressure input to the chamber is controlled within a range of 3 6 〇 T rr to 2 当 when the two panels are adhered. Φ -21- 1298413 Lu, (1), the designated representative country of this case is: 3rd picture ring Lujing gij Μ Μ face ^ ..... (2), the representative symbol of the representative figure is a simple description: 柒, this case If there is a chemical formula, read the chemical formula 110 that reveals the most uninvented features. Panel 120 Panel 210 First platform 220 Second platform 230 Room 240 Alignment platform 250 Position sensor 260 Second support 270 Vacuum pump 280 Air supply unit 290 a support