JPH0882803A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: To make it possible to position both of driving side terminals and anisotropic conductive film with positioning key marks arranged on both sides of the signal line terminals of a liquid crystal display element. CONSTITUTION: This liquid crystal display device is formed by connecting the signal line terminals 5 connected to the signal lines 3 and the driving side terminals 7 on a driving circuit side of the liquid crystal display element 1 by the anisotropic conductive film 10. A pair of the positioning key marks 4 having the shape to allow positioning of the driving side terminals 7 and the anisotropic conductive film 10 are arranged on both sides of the signal line terminals 5. Both of the driving side terminals 7 and the anisotropic conductive film 10 are positioned by a pair of such positioning key marks 4 according to this constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used for a thin display device such as a liquid crystal color television.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing the overall structure of a conventional liquid crystal display device.

FIG. 4 is a plan view showing a state in which a TCP (tape carrier package) 2 of a liquid crystal display device is connected. FIG. 5 shows both ends of the signal line terminal of the liquid crystal display device and the TCP.
It is the top view which expanded both ends of 2.

Conventionally, in the liquid crystal display device, the signal line terminal 5 connected to the signal line 3 of the liquid crystal display element 1 and the drive side terminal 7 on the drive IC 8 side are connected by the anisotropic conductive film 10. In such a liquid crystal display device, the signal line terminal 5
In order to position the drive-side terminal 7 and the pair of positioning key marks 9 arranged on both sides of the signal line terminal 5, a key facing the pair of positioning key marks 9 is provided in the TCP 2 having the drive-side terminal 7. The mark 6 is arranged. In FIG. 1, 11 is a driver substrate.

When connecting the TCP 2, first, the anisotropic conductive film 10 is deposited on the signal line terminals 5 of the liquid crystal display element 1, and then the corresponding positioning key mark 9 is used as shown in FIG. Precise pressure bonding with high precision alignment. And
Although not shown, main pressure bonding is performed by pressing and heating with a heater chip to melt and soften the anisotropic conductive film 10 to electrically and mechanically connect the corresponding signal line terminal 5 and drive side terminal 7 to each other. Connecting.

[0006]

However, in the above-mentioned conventional structure, the signal line terminal 5 and the driving side terminal 7, and the anisotropic conductive film 10 and the signal line terminal 5 can be positioned only individually, and therefore, they are dedicated to each. There is a problem that a positioning pattern must be provided.

Further, the positioning of the anisotropic conductive film 10 is
Although not shown, positioning by patterns provided on both ends of the liquid crystal display element 1 or a method based on the outer shape of the liquid crystal display element 1 is often used.

If the drive IC 8 malfunctions due to static electricity or the like, there is a repair work in which the TCP 2 having the drive side terminal 7 is partially removed and then reconnected. Most of this work is generally done manually, and the anisotropic conductive film 10 may be temporarily fixed to the TCP 2 side.
In the case of temporarily fixing 0, the workability was poor because there was no partial positioning key mark. Furthermore, it has been difficult to quantitatively confirm the amount of displacement.

In order to solve the above problems, the present invention provides a liquid crystal display device capable of positioning both the drive side terminal and the anisotropic conductive film with a pair of positioning key marks arranged on both sides of the signal line terminal of the liquid crystal display element. The purpose is to provide.

[0010]

To achieve this object, in the present invention, a signal line terminal connected to a signal line of a liquid crystal display element and a drive side terminal on a drive circuit side are anisotropic conductive films. In the liquid crystal display device connected by, a pair of positioning key marks having a shape capable of positioning the driving side terminal and the anisotropic conductive film are arranged on both sides of the signal line terminal. Further, the positioning key mark has a shape extending outward from the TCP having the drive side terminal. Further, it is made of a metal film and is formed of an opaque electrode.

[0011]

With this structure, both the drive side terminal and the anisotropic conductive film can be positioned by the pair of positioning key marks. After the positioning, visual confirmation of the position can be facilitated quantitatively. Furthermore, a T having a driving side terminal
When CP is partially removed and then reconnected, it is a positioning key mark in which the pattern is extended to the same position as the width of the anisotropic conductive film, so it is easy to manually replace the anisotropic conductive film. Can be positioned.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to the drawings. In FIGS. 1 and 2, the same parts as those shown in FIGS. 3 to 5 are designated by the same reference numerals.

FIG. 1 is a plan view in which a signal line terminal 5 connected to a signal line 3 and a driving side terminal 7 of a liquid crystal display element 1 according to an embodiment of the present invention are positioned.

The pair of positioning key marks 4 arranged on both sides of the signal line terminal 5 are formed to have the same width as the anisotropic conductive film 10. The actual width of use is generally 2 mm and 2.5 mm. Further, the positioning key mark 4 is TCP
It is configured by forming a substantially C-shaped pattern extending from 2 to the outside at two positions at both ends with a pattern width of 0.2 mm. When the anisotropic conductive film 10 is positioned and after positioning, it is positioned and confirmed in the width direction. It has a shape that allows The amount of deviation after deposition can be quantitatively grasped from this pattern width. At this time, the tolerance is ± 0.2 mm. Then, the signal line terminal 5 connected to the signal line 3 of the liquid crystal display element 1 and the driving side terminal 7 of the TCP 2 are positioned by using the inner portion of the positioning key mark 4. In addition, TCP
When 2 is partially removed and then reconnected, the anisotropic conductive film 10 can be partially reattached by hand, and the amount of deviation in the width direction after the anisotropic conductive film 10 is attached can be visually checked. Can be easily and quantitatively grasped.

The composite positioning key mark 4 is C
Since it is made of a metal film of r, AL, Ti or the like and is formed of an opaque electrode, it improves the monitor state by a camera or the like as compared with the positioning key mark 4 mainly composed of the ITO electrode conventionally used. It becomes possible.

In the case of this opaque electrode, not only reflected light but also transmitted light can be used as illumination when a CCD camera is used, so that a high contrast can be obtained and a good image can be obtained.

[0017]

As described above, according to the present invention, in order to position the signal line terminal and the driving side terminal, the pair of composite positioning key marks arranged on both sides of the signal line terminal are provided with the driving side terminal and the anisotropy. Since the conductive film has a shape capable of being positioned, workability can be significantly improved in accuracy confirmation after connection and reconnection after TCP is partially removed, and misalignment can be quantitatively determined. .

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of a main part of a liquid crystal display device according to an embodiment of the present invention.

FIG. 3 is an overall perspective view of a conventional liquid crystal display device.

FIG. 4 is a plan view of a connection electrode portion of a conventional liquid crystal display device.

FIG. 5 is a partially enlarged view of a connection electrode portion of a conventional liquid crystal display device.

[Explanation of symbols]

 1 liquid crystal display element 2 TCP 3 signal line 4 positioning key mark 5 signal line terminal 6 key mark 7 drive side terminal 8 drive IC 10 anisotropic conductive film

Claims (3)

[Claims] 1. A signal line terminal connected to a signal line of a liquid crystal display element and a drive side terminal on a drive circuit side are connected by an anisotropic conductive film, and the signal line terminal and the drive side terminal are positioned. Therefore, a pair of positioning key marks having a shape capable of positioning the driving side terminal and the anisotropic conductive film are arranged on both sides of the signal line terminal. 2. The liquid crystal display device according to claim 1, wherein the positioning key mark has a shape extending outward from a tape carrier package portion having the drive side terminal. 3. The positioning key mark is made of Cr, AL, T.
The liquid crystal display device according to claim 1, which is made of a metal film such as i and is opaque.