JP3323018B2 - Liquid crystal display panel manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display panel in which the number of steps is reduced to reduce the manufacturing cost.

[0002]

2. Description of the Related Art A liquid crystal display panel having a connection means for electrically transferring a transparent electrode provided on one transparent substrate to another transparent substrate has been proposed in Japanese Patent Application Laid-Open No. Sho 52-20047. This technology is used for chip-on-glass (CHIP)
-ON-GLASS (hereinafter abbreviated as COG) has been proposed and applied to a liquid crystal display panel using a mounting technique of a system.

FIG. 3 is a plan view of the liquid crystal display panel 1 of the COG system, and FIG. 4 is a sectional view taken along the line XX of FIG. According to the drawing, a scanning side substrate 4 having transparent electrodes 2 and 3 formed on its inner surface and a signal side substrate 5 are arranged to face each other, and an alignment film (not shown) is provided on each transparent electrode 2 and 3. Is provided. The substrates 4 and 5 are fixed with a sealant 6 interposed therebetween, and a spacer 7 is used to keep the distance between the substrates constant. The liquid crystal 8 is sealed between the two substrates. The transparent electrode 2 of the scanning side substrate 4 is electrically connected to the transparent electrode 3 of the signal side substrate 5 through an Ag paste 9 provided by a printing method at the end. 1
0 is a driving IC, and 11 is an input cable.

[0004]

However, when manufacturing the liquid crystal display panel 1 having the above-described structure, a step of screen-printing the sealant 6 on the signal-side substrate 5 and a step of printing the Ag paste 9 on the scanning-side substrate 4 are performed. Is required, and the production cost is high because of the two steps, and a satisfactory low cost has not yet been achieved.

Accordingly, the present invention has been completed in view of the above circumstances, and an object of the present invention is to provide a method of manufacturing a liquid crystal display panel in which the number of steps is reduced and the manufacturing cost is reduced.

[0006]

The method of manufacturing a liquid crystal display panel according to the present invention comprises the following steps A to E in order. Step A: A square or rectangular display area is provided by forming a transparent electrode pattern on one transparent substrate and the other transparent substrate. Step B: An adhesive resin containing a resin spherical body made conductive along the periphery of the display area on one of the transparent substrates by screen printing is applied to the filament to provide a seal member, and at the same time, one side of the display area To form an electrical transfer member. Step C: A plurality of spherical spacers having a diameter smaller than that of the resin spherical body are sprayed on one of the transparent substrate and the other transparent substrate. Step D: bonding one transparent substrate and the other transparent substrate through the above-mentioned sealing member, and conducting each of the transparent electrode patterns on the one transparent substrate and the other transparent substrate individually through the above-mentioned electric transfer member. Let me know. Step E: A liquid crystal material is sealed in the space of the display area of the bonded transparent substrate.

[0007]

In the method of manufacturing a liquid crystal display panel according to the present invention, in the step B, the adhesive resin containing the resin spherical body whose surface is made conductive along the periphery of the display region on one of the transparent substrates is striated. At the same time as providing the sealing member by applying to the inside along one side of the display area to form the electric transfer member, so that the electric transfer member is not separately applied as in the related art, The sealing member and the electric transfer member can be simultaneously formed by one process, and as a result, the number of processes can be reduced and the manufacturing cost can be reduced.

[0008]

FIG. 1 is a plan view of a COG type liquid crystal display panel 12 according to a manufacturing method of the present invention, and FIG.
It is sectional drawing by a Y sectional line. The same parts as those of the conventional liquid crystal display panel 1 are denoted by the same reference numerals.

Referring to FIG. 1, a scanning side substrate 4 having ITO transparent electrodes 2 and 3 formed on its inner surface and a signal side substrate 5 are arranged to face each other. A resin alignment film (not shown) is provided. The two substrates 4 and 5 are fixed via a sealant 13, and furthermore, a spacer 7 is used to keep the substrate interval constant. The liquid crystal 8 is sealed between the two substrates. 10 is a driving IC, and 11 is an input cable.

The spacer 7 is a resin spherical body having a diameter of 6.5 μm. On the other hand, the sealing agent 13 is a resin spherical body (for example, a cross-linked divinylbenzene polymer) whose surface is made conductive with, for example, Ni. %, The diameter of the resin spherical body is larger than the diameter of the spacer 7, and is about 7.0 μm. That is, the spacers 7 having a smaller diameter than the diameter of the resin spherical body are sprayed. Since the resin contains a conductive resin spherical body, the resin can be used as the electric transfer member 14. Transparent electrode 2 of scanning side substrate 4
At the end, electrical continuity is achieved with the transparent electrode 3 of the signal-side substrate 5 through the electrical transfer member 14. The sealant 13 used was a resin containing a resin spherical body whose surface was made conductive with, for example, Ni. However, instead of this surface conductive resin spherical body, the entire resin had conductivity. A resin spherical body or a conductive resin spherical body containing many fine metal particles may be used.

A method for manufacturing the liquid crystal display panel 12 having the above configuration will be described in detail. The method of manufacturing the liquid crystal display panel 12 includes the following steps A to E in order.

Step A: A square or rectangular display area is provided by forming transparent electrode patterns of the transparent electrodes 2 and 3 on the scanning side substrate 4 and the signal side substrate 5, respectively.

Step B: Along the periphery of the display area on the signal-side substrate 5, the adhesive resin is applied to the filaments to provide the sealant 13 as the seal member, and at the same time, along one side of the display area. Then, the electric transfer member 14 is formed by coating the inside.

Step C: scanning side substrate 4 or signal side substrate 5
A plurality of spacers 7 having a smaller diameter than the diameter of the resin spherical body are sprayed on one of the substrates.

D step: scanning side substrate 4 or signal side substrate 5
Are bonded together via the sealant 13. At this time, the transparent electrode patterns of the scanning side substrate 4 and the signal side substrate 5 are individually set to be conductive through the electric transfer member 14.

Step E: A liquid crystal 8 is sealed in the space of the display area of the bonded substrate.

Thus, according to the above-mentioned manufacturing method, in the step B, the sealant 13 and the electric transfer member 14 can be simultaneously screen-printed, whereby the number of steps can be reduced as compared with the related art.

The present invention is not limited to the above embodiment, and various changes and improvements can be made without departing from the scope of the present invention.

[0019]

According to the present invention, the seal member and the electric transfer member can be formed simultaneously by a single process without separately applying an electric transfer member as in the prior art. The manufacturing cost can be reduced, and as a result, an inexpensive liquid crystal display panel can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a liquid crystal display panel according to an embodiment.

FIG. 2 is a schematic sectional view of a liquid crystal display panel according to an embodiment.

FIG. 1 is a schematic plan view of a conventional liquid crystal display panel.

FIG. 2 is a schematic sectional view of a conventional liquid crystal display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 12 Liquid crystal display panel 2, 3 Transparent electrode 4 Scanning substrate 5 Signal side substrate 7 Spacer 8 Liquid crystal 13 Sealant 14 Electrical transfer member

Claims (1)

(57) [Claims] 1. A method for manufacturing a liquid crystal display panel comprising the following steps A to E in order. Step A: A square or rectangular display area is provided by forming a transparent electrode pattern on one transparent substrate and the other transparent substrate. Step B: an adhesive resin containing a resin spherical body made conductive along the periphery of the display area on the one transparent substrate by screen printing is applied to the striated wire to provide a seal member, and at the same time, the display area Is applied to the inside along one side to form an electrical transfer member. Step C: A plurality of spherical spacers having a diameter smaller than the diameter of the resin spherical body are dispersed on one of the transparent substrate and the other transparent substrate. Step D: bonding the one transparent substrate and the other transparent substrate via the seal member, and individually passing the transparent electrode patterns on the one transparent substrate and the other transparent substrate through the electric transfer member Make it conductive. Step E: A liquid crystal material is sealed in the space of the display area of the bonded transparent substrate.