JP5147639B2 - Liquid crystal display panel and manufacturing method thereof - Google Patents

Description

  The present invention relates to a liquid crystal display panel and a method for manufacturing the same.

In a manufacturing process of a liquid crystal display panel, a large pair of glass substrates are fixed with a sealing material with a plurality of sealing materials surrounding a plurality of liquid crystal enclosing regions corresponding to the plurality of cells, respectively, and then fixed to each cell. It is known to cut. Moreover, in order to expose the terminal formed in one glass substrate from the other glass substrate, the other glass substrate was cut | disconnected. Cutting is performed by enlarging cracks (scribe lines) formed by the scribe process. A wiring board is electrically connected to the exposed terminal. In addition, a liquid crystal panel having a thin glass substrate has been developed for use in a curved display. In this case, a thin glass substrate must be cut. The selection technical literatures related to the above technology include the following.
JP 2008-39866 A

  In recent years, it has been studied to use a resin substrate instead of a glass substrate, but the resin substrate cannot be cut by a scribe process. Therefore, since the wiring terminals cannot be exposed, the wiring board cannot be electrically connected. An object of the present invention is to easily electrically connect a wiring board to a terminal.

  (1) In the method for manufacturing a liquid crystal display panel according to the present invention, a second substrate made of a material containing resin so as to cover the terminal with a gap formed in the first substrate on which wiring and terminals are formed. Placing the liquid crystal between the first and second substrates, avoiding the terminal, and bending the second substrate to expose the terminal from the portion covering the terminal Electrically connecting a wiring board to the exposed terminal; and overlapping the portion of the second board covering the terminal on the wiring board between the first and second boards. And a step of sandwiching the wiring board. According to the present invention, the wiring board can be easily electrically connected to the terminal by bending the second board.

  (2) In the method of manufacturing a liquid crystal display panel described in (1), after the step of exposing the terminals and before the step of sandwiching the wiring board, the gap between the first and second substrates. The method may further include providing an adhesive in a region adjacent to the wiring board.

  (3) In the method of manufacturing a liquid crystal display panel described in (1) or (2), the second substrate has an inner groove on a surface facing the first substrate, and the second substrate is In the step of bending, the second substrate may be bent along the inner groove.

  (4) In the method for manufacturing a liquid crystal display panel according to any one of (1) to (3), the second substrate has an outer groove on a surface facing away from the first substrate. Then, in the step of bending the second substrate, the second substrate is bent in a first direction and the wiring substrate is electrically connected, and the wiring substrate is connected to the outer groove at the tip. The portion covering the terminal of the second substrate is disposed along the outer groove in the step of placing the portion covering the terminal of the second substrate on the wiring substrate. It may be characterized by bending in a second direction opposite to the first direction.

  (5) A liquid crystal display panel according to the present invention has a first substrate having a first end region, and having a terminal in the first end region, and a second covering the first end region. A second substrate made of a resin-containing material and spaced from the first substrate, adjacent to the first and second end regions, and A sealing material that partitions the space between the first and second substrates and fixes the first and second substrates, a liquid crystal sealed in the space partitioned by the sealing material, and the terminal A wiring board that is electrically connected and sandwiched between the first and second end regions, wherein the second end region bends oppositely to each other. And the first bent portion is closer to the seal material than the second bent portion, and the second bent portion is connected to the first substrate. Characterized in that it bends in the direction away al.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a liquid crystal display panel according to an embodiment of the present invention. 2 is a cross-sectional view of the liquid crystal display panel shown in FIG. 1 taken along the line II-II.

  The liquid crystal display panel according to the embodiment of the present invention includes a first substrate 10 and a second substrate 12. The first substrate 10 is formed with wirings 14 and terminals 16 electrically connected to the wirings 14, and further, transistors and electrodes (not shown) are formed, and an alignment film is formed on the surface facing the second substrate 12. (Not shown) is formed. A color filter and an alignment film (not shown) are formed on the second substrate 12.

  The driving method of the liquid crystal display panel may be any method such as an IPS (In Plane Switching) method, a TN (Twisted Nematic) method, or a VA (Virtical Alignment) method, and an electrode corresponding to the method is formed.

  The first substrate 10 has a first end region 18 and terminals 16 in the first end region 18. The first substrate 10 is made of glass or resin or a material containing resin. The second substrate 12 is made of a material containing resin (for example, only resin). The second substrate 12 has flexibility and can be bent or curved. The second substrate 12 is disposed with a gap from the first substrate 10, and has a second end region 20 that covers the first end region 18.

  Adjacent to the first end region 18 and the second end region 20, a sealing material (for example, a thermosetting epoxy adhesive) 22 divides the space between the first substrate 10 and the second substrate 12. The first substrate 10 and the second substrate 12 are fixed by partitioning. Liquid crystal 24 is sealed in the space defined by the sealing material 22.

  A wiring substrate 26 (for example, a flexible wiring substrate) is sandwiched between the first end region 18 and the second end region 20. A wiring pattern 28 of the wiring board 26 is electrically connected to the terminal 16.

  Since the wiring substrate 26 is interposed between the first substrate 10 and the second substrate 12, the second end region 20 includes the first bent portion 30 and the second bent portion 32 that are bent opposite to each other. Have. The first bent portion 30 and the second bent portion 32 draw an S shape. The first bent portion 30 is closer to the sealing material 22 than the second bent portion 32. The first bent portion 30 bends in the direction in which the second bent portion 32 is separated from the first substrate 10. Specifically, the first bent portion 30 bends so that the distance from the first substrate 10 increases as it advances from the sealing material 22 to the tip. On the contrary, the second bent portion 32 bends so that the distance from the first substrate 10 decreases as it advances from the second bent portion 32 to the tip.

  An adhesive 34 is provided in a region between the first substrate 10 and the second substrate 12 (the first end region 18 and the second end region 20) and adjacent to the wiring substrate 26. . The adhesive 34 fixes the first substrate 10 and the second substrate 12, and fixes the first substrate 10, the second substrate 12, and the wiring substrate 26.

  Other details of the liquid crystal display panel according to the present embodiment correspond to the contents of a known liquid crystal display panel.

  3 and 4 are diagrams for explaining a method of manufacturing a liquid crystal display panel according to the embodiment of the present invention.

  In the method for manufacturing a liquid crystal display panel according to the present embodiment, a first substrate 10 and a second substrate 12 are prepared. The second substrate 12 is made of a material containing resin. The second substrate 12 is disposed on the first substrate 10 so as to cover the terminals 16 with a gap. Further, the sealing material 22 is arranged avoiding the region where the terminals 16 are formed, and the liquid crystal 24 is sealed between the first substrate 10 and the second substrate 12 in the region sealed with the sealing material 22. To do.

  As shown in FIG. 3, for example, the second substrate 12 is bent by adsorbing the outer surface of the second substrate 12 using an adsorber (not shown). Then, the terminal 16 is exposed from the portion covering the terminal 16. The second substrate 12 may be bent about 90 °. In order to prevent the second substrate 12 from being peeled off from the sealing material 22, this step may be performed by sandwiching a portion of the first substrate 10 and the second substrate 12 facing the sealing material 22 with the tool 100. . The wiring pattern 28 of the wiring board 26 is electrically connected to the exposed terminal 16.

  As shown in FIG. 4, an adhesive 34 is provided in a region between the first substrate 10 and the second substrate 12 and adjacent to the wiring substrate 26. The first substrate 10 and the second substrate 12 are fixed by the adhesive 34, and the first and second substrates 10 and 12 and the wiring substrate 26 are fixed.

  Since internal stress is generated in the second substrate 12 by bending, when the bending action is released, the shape of the second substrate 12 returns in a direction to reduce the internal stress. In this way, the portion of the second substrate 12 that covers the terminal 16 is overlapped with the wiring substrate 26, and the wiring substrate 26 is sandwiched between the first substrate 10 and the second substrate 12.

  The electrical connection between the terminals 16 and the wiring pattern 28 of the wiring board 26 may be performed after the wiring board 26 is sandwiched between the first board 10 and the second board 12. In that case, heat and pressure are applied between the terminal 16 and the wiring pattern 28 via at least one of the first substrate 10 and the second substrate 12. For example, a thermocompression bonding head (not shown) may be pressed against at least one of the first substrate 10 or the second substrate 12. The first substrate 10 and the second substrate 12 have heat resistance that can withstand thermocompression bonding.

  According to the present embodiment, the wiring board 26 can be easily electrically connected to the terminals 16 by a simple process of bending the second board 12. The other details correspond to the contents of a well-known method for manufacturing a liquid crystal display panel, and the contents described for the liquid crystal display panel.

(Modification)
FIG. 5 is a cross-sectional view showing a modification of the liquid crystal display panel according to the embodiment of the present invention. In this example, the second substrate 12 has an inner groove 36 on the surface facing the first substrate 10. The second substrate 12 has an outer groove 38 on the surface facing away from the first substrate 10.

  The inner groove 36 or the outer groove 38 can be formed by a laser. By adjusting the focus of the laser, the inner groove 36 or the outer groove 38 can be formed by laser irradiation from the opposite surface. For example, after the second substrate 12 is attached to the first substrate 10, the laser is focused on the surface of the second substrate 12 facing the first substrate 10, and the first substrate of the second substrate 12. The inner groove 36 can be formed by irradiating a laser beam from the surface facing away from 10.

  In the step of electrically connecting the wiring board 26, the wiring board 26 is disposed so that the front end faces the outer groove 38. Specifically, the wiring board 26 is disposed so that the tip thereof overlaps the projection surface of the outer groove 38. In the step of bending the second substrate 12, the second substrate 12 is bent along the inner groove 36. In the step of bending the second substrate 12, the second substrate 12 is bent in the first direction. In the step of overlapping the portion covering the terminal 16 of the second substrate 12 on the wiring substrate 26, the portion covering the terminal 16 of the second substrate 12 along the outer groove 38 is opposite to the first direction. Bend in the direction.

  According to this example, the second groove 12 is easily bent by the inner groove 36 and the outer groove 38. The details of the liquid crystal display panel correspond to the other details, and the description of the method of manufacturing the liquid crystal display panel also applies to the manufacturing method.

  The present invention is not limited to the embodiment described above, and various modifications are possible. For example, the configuration described in the embodiment can be replaced with a substantially the same configuration, a configuration that exhibits the same operational effects, or a configuration that can achieve the same purpose.

It is a perspective view which shows the liquid crystal display panel which concerns on embodiment of this invention. It is the II-II sectional view taken on the line of the liquid crystal display panel shown in FIG. It is a figure explaining the manufacturing method of the liquid crystal display panel which concerns on embodiment of this invention. It is a figure explaining the manufacturing method of the liquid crystal display panel which concerns on embodiment of this invention. It is sectional drawing which shows the modification of the liquid crystal display panel which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 1st board | substrate, 12 2nd board | substrate, 14 wiring, 16 terminal, 18 1st edge part area | region, 20 2nd edge part area | region, 22 sealing material, 24 liquid crystal, 26 wiring board, 28 wiring pattern, 30 First bend, 32 Second bend, 34 Adhesive, 36 Inner groove, 38 Outer groove, 100 Tools.

Claims (7)

A second substrate made of a resin-containing material is disposed on the first substrate on which the wiring and the terminals are formed so as to cover the terminals with a gap therebetween, and the first and second substrates are avoided by avoiding the terminals. Encapsulating liquid crystal between two substrates;
Bending the second substrate to expose the terminal from a portion covering the terminal;
Electrically connecting a wiring board to the exposed terminal;
Stacking the portion covering the terminal of the second substrate on the wiring substrate and sandwiching the wiring substrate between the first and second substrates;
Only including,
The second substrate has an inner groove on a surface facing the first substrate,
A method of manufacturing a liquid crystal display panel, wherein the second substrate is bent along the inner groove in the step of bending the second substrate . In the manufacturing method of the liquid crystal display panel described in Claim 1,
After the step of exposing the terminals and before the step of sandwiching the wiring board, further providing an adhesive in a region between the first and second boards and adjacent to the wiring board A method for producing a liquid crystal display panel, comprising: In the manufacturing method of the liquid crystal display panel described in Claim 1 or 2 ,
The second substrate has an outer groove on a surface facing away from the first substrate,
Bending the second substrate in a first direction in the step of bending the second substrate;
In the step of electrically connecting the wiring board, the wiring board is disposed so that the tip faces the outer groove,
In the step of overlapping the portion covering the terminal of the second substrate on the wiring substrate, the portion covering the terminal of the second substrate is opposite to the first direction along the outer groove. A method of manufacturing a liquid crystal display panel, wherein the liquid crystal display panel is bent in a second direction. A second substrate made of a resin-containing material is disposed on the first substrate on which the wiring and the terminals are formed so as to cover the terminals with a gap therebetween, and the first and second substrates are avoided by avoiding the terminals. Encapsulating liquid crystal between two substrates;
Bending the second substrate to expose the terminal from a portion covering the terminal;
Electrically connecting a wiring board to the exposed terminal;
Stacking the portion covering the terminal of the second substrate on the wiring substrate and sandwiching the wiring substrate between the first and second substrates;
Including
The second substrate has an outer groove on a surface facing away from the first substrate,
Bending the second substrate in a first direction in the step of bending the second substrate;
In the step of electrically connecting the wiring board, the wiring board is disposed so that the tip faces the outer groove,
In the step of overlapping the portion covering the terminal of the second substrate on the wiring substrate, the portion covering the terminal of the second substrate is opposite to the first direction along the outer groove. A method of manufacturing a liquid crystal display panel, wherein the liquid crystal display panel is bent in a second direction. A first substrate having a first end region and having a terminal in the first end region;
A second substrate made of a resin-containing material, having a second end region covering the first end region, and arranged with a gap from the first substrate;
A sealant that partitions the space between the first and second substrates and fixes the first and second substrates adjacent to the first and second end regions;
Liquid crystal sealed in the space partitioned by the sealing material;
A wiring board electrically connected to the terminal and sandwiched between the first and second end regions;
Including
The second end region has first and second bent portions that are bent opposite to each other.
The first bent portion is closer to the sealing material than the second bent portion, and the first substrate of the second substrate is in a direction to separate the second bent portion from the first substrate. A liquid crystal display panel that is bent along an inner groove formed on a surface facing the surface . The liquid crystal display panel according to claim 5,
The second bent portion is in a direction opposite to a direction in which the first bent portion is bent along an outer groove formed on a surface of the second substrate facing away from the first substrate. Bent to
The liquid crystal display panel, wherein the wiring substrate is disposed so that a tip thereof faces the outer groove. A first substrate having a first end region and having a terminal in the first end region;
A second substrate made of a resin-containing material, having a second end region covering the first end region, and arranged with a gap from the first substrate;
A sealant that partitions the space between the first and second substrates and fixes the first and second substrates adjacent to the first and second end regions;
Liquid crystal sealed in the space partitioned by the sealing material;
A wiring board electrically connected to the terminal and sandwiched between the first and second end regions;
Including
The second end region has first and second bent portions that are bent opposite to each other.
The first bent portion is closer to the sealing material than the second bent portion, and is bent in a first direction separating the second bent portion from the first substrate;
The second bent portion is bent in a second direction opposite to the first direction along an outer groove formed on a surface of the second substrate facing away from the first substrate. And
The liquid crystal display panel , wherein the wiring substrate is disposed so that a tip thereof faces the outer groove .

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