JP3013801B2 - Liquid crystal display device assembling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a COF semiconductor device (chip-on-flexible printed circuit,
Hereinafter referred to as COF. The present invention relates to a method for assembling a liquid crystal display device using the above method.

[0002]

2. Description of the Related Art Conventionally, when aligning an output terminal of a COF with an input terminal of a liquid crystal display device in a liquid crystal display device using a COF, as shown in FIG. There is no reference pattern to align both terminals. To align both terminals, the horizontal alignment is controlled by the amount of overlap between the two terminals, and the vertical alignment is the COF The distance between a certain reference portion and the glass edge of the liquid crystal display element has been managed.

[0003]

In the prior art, (1) when the alignment position between the COF output terminal and the input terminal of the liquid crystal display element is changed due to a model change or the like, the vertical alignment amount is particularly reduced. Must be changed. (2) On the glass edge basis, there is a large variation in the absolute position and a large individual variation in the product. (3) There is a problem that it is difficult to define the absolute position, and it is not possible to automate the alignment between the COF and the liquid crystal display element. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above problems and to provide a method of assembling a liquid crystal display device using a COF that can be easily and automatically assembled.

(2) Absolute position variation is large on a glass edge basis, and product solid variation is large. (3) It is difficult to define the absolute position, and it is not possible to automate the alignment between the COF and the liquid crystal display element. Had the problem of saying. Accordingly, it is an object of the present invention to solve the above problems and to provide a liquid crystal display device using a COF that can be easily and automatically assembled.

[0005]

According to the present invention, there is provided a method for assembling a liquid crystal display device, comprising: a liquid crystal display element having an input terminal on which a first alignment pattern is formed; and an output device on which a second alignment pattern is formed. A method of assembling a liquid crystal display device comprising a semiconductor device having terminals, wherein the first alignment pattern formed on the input terminal itself and the second alignment pattern formed on the output terminal itself. And positioning the input terminal and the output terminal. Further, the input terminal and the output terminal are automatically aligned. Further, the relative position of the output terminal with respect to the input terminal is calculated by recognizing the first alignment pattern and the second alignment pattern, and the liquid crystal display element and the semiconductor device are calculated based on the calculation result. Is performed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] FIGS. 1A to 1C are plan views showing one embodiment of a liquid crystal display device of the present invention. FIG. 1A is an input terminal of a liquid crystal display element (hereinafter referred to as LCD) 1. L on the outermost of 3
This shows a state in which the CD alignment pattern 5 is graduated. FIG. 1B shows a state in which a COF alignment pattern 6 is provided at the outermost part of the output terminal 4 of the COF 2. FIG. 1C shows the LC shown in FIG.
1 shows a state where the input terminal 3 of D1 and the output terminal 4 of COF2 shown in FIG. 1B are aligned using the LCD alignment pattern 5 and the COF alignment pattern 6. By using the alignment patterns (5 and 6), the alignment accuracy between the input terminal 3 of the LCD 1 and the output terminal 4 of the COF 2 is improved by 10 times or more in the horizontal, vertical and rotational directions. In addition, LCD1 and C
Even if the alignment position of the OF2 changes, the LCD alignment pattern 5 is scaled, so that the position where the COF alignment pattern 6 is aligned is changed only by changing the scale of the LCD alignment pattern 5. The alignment of the LCD 1 and the COF 2 can be performed with the alignment accuracy.

FIGS. 2 (a) to 2 (f) are views showing another embodiment of the portion A of FIG. 1 (a), that is, the shape of the LCD alignment pattern 5, which is the same as the embodiment of FIG. 1 (a). Good results were obtained.

FIGS. 3 (a) to 3 (f) are views showing another embodiment of the shape of the COF alignment pattern 6, ie, B in FIG. 1 (b), which is the same as the embodiment of FIG. 1 (b). Good results were obtained.

Embodiment 2 FIGS. 4A and 4B are plan views showing another embodiment of the liquid crystal display device of the present invention. FIG. 4A shows that the LCD alignment pattern 5 is provided outside the input terminal 3 of the LCD 1. FIG. 4B shows that the COF alignment pattern 6 is provided in a part of the output terminal 4 of the COF 2. LCD alignment pattern 5 and C
When the OF alignment pattern 6 is used, the relative position of the output terminal 4 of the COF 2 with respect to the position of the input terminal 3 of the LCD 1 can be determined by separating the LCD alignment pattern 5 and the COF alignment pattern 6 by a COF alignment machine having absolute coordinates. Is obtained by calculation by recognizing the pattern. Therefore, the position of the LCD 1 and the COF 2 can be aligned based on the calculation result, and the alignment of the LCD 1 and the COF 2 can be fully automated. Further, even if the alignment position of the LCD 1 and the COF 2 changes due to a difference in product specifications, etc., all products can be handled only by changing the alignment data of the COF alignment machine. Also in this embodiment, the alignment accuracy of the LCD 1 and the COF 2 equal to or higher than that of the first embodiment can be realized.

FIGS. 5 (a) to 5 (g) are diagrams showing an embodiment in which the pattern shape of the portion C in FIG. 4 (a), that is, the LCD alignment pattern 5, is changed. Good results were obtained in the same manner as in Example 1.

FIGS. 6 (a) to 6 (d) are views showing one embodiment in which the D portion of FIG. 4 (b), that is, the pattern shape of the COF alignment pattern 6 is changed, and FIG. 4 (b) Good results were obtained in the same manner as in Example 1.

[0012]

As described above, in the method of assembling the liquid crystal display device according to the present invention, the alignment pattern is formed on the input terminal itself of the liquid crystal display element and the output terminal itself of the semiconductor device, respectively. In addition, there is an effect that alignment of the semiconductor device can be easily and accurately performed, and full automation can be performed. Thus, a high-density and low-cost liquid crystal display device can be provided.

[Brief description of the drawings]

FIGS. 1A to 1C are views showing one embodiment of a liquid crystal display device of the present invention.

2 (a) to 2 (f) are views showing another embodiment of the portion A in FIG. 1 (a).

3 (a) to 3 (f) are views showing another embodiment of a portion B in FIG. 1 (b).

4A and 4B are diagrams showing another embodiment of the liquid crystal display device of the present invention.

5 (a) to 5 (g) are views showing another embodiment of the portion C in FIG. 4 (a).

6 (a) to 6 (d) are views showing another embodiment of a portion D in FIG. 4 (b).

FIG. 7 is a diagram showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Liquid product display element 2 ... COF 3 ... Input terminal 4 ... Output terminal 5 ... LCD alignment pattern 6 ... COF alignment pattern 7 ... COF reference pattern 8 ... Glass edge

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/1345

Claims (3)

(57) [Claims] 1. A method for assembling a liquid crystal display device comprising: a liquid crystal display element having an input terminal on which a first alignment pattern is formed; and a semiconductor device having an output terminal on which a second alignment pattern is formed. By aligning the first alignment pattern formed on the input terminal itself and the second alignment pattern formed on the output terminal itself, the input terminal and the output terminal A method for assembling a liquid crystal display device, comprising: 2. The method according to claim 1, wherein the input terminal and the output terminal are automatically aligned. 3. A relative position of the output terminal with respect to the input terminal is calculated by recognizing the first alignment pattern and the second alignment pattern,
3. The method according to claim 1, wherein the alignment between the liquid crystal display element and the semiconductor device is performed based on the calculation result.