KR19990025717U - T, P, P with test mark - Google Patents

Abstract

The present invention relates to a liquid crystal display module, and more particularly, to a TPC used for electrical connection between a liquid crystal panel and a printed circuit board. The T, C, and P with test marks of the present invention are provided with a first hole on each side edge of the portion bonded to the printed circuit board, and the first hole has a predetermined hole for checking the alignment with the printed circuit board. It is provided with an alignment mark of the form, and in the center of the alignment mark is provided with a second hole for checking the adhesion state with the printed circuit board.

Description

T, P, P with test mark

The present invention relates to a liquid crystal display module, and more particularly, to a tape carrier package (TCP) used for electrical connection between a liquid crystal panel and a printed circuit board.

In general, a liquid crystal display module includes a liquid crystal panel in which a lower substrate in which pixels are arranged in a matrix and an upper substrate in which a color filter is bonded to each other with a liquid crystal interposed therebetween, and a driving voltage for each pixel arranged in the matrix. And a printed circuit board (PCB) for applying a driving signal to the drive IC.

In the above, as a technology for electrically connecting the liquid crystal panel and the drive IC, a flat drive IC package is mounted on the conductive film, and the TCP technology for connecting the conductive film and the liquid crystal panel, and the drive IC includes the liquid crystal panel There is a technology such as a chip on glass (COG) that directly bonds with the driving pins exposed on the image.

1 is a diagram illustrating a liquid crystal display module according to the related art using TCP as described above. As shown, the liquid crystal display module has a liquid crystal panel 1 in which upper and lower substrates 1a and 1b are bonded to each other with a liquid crystal (not shown) interposed therebetween and a PCB 2 provided with a circuit pattern by a predetermined distance. The liquid crystal panel 1 and the PCB 2 are spaced apart, and are electrically connected by a TCP 3 mounted with a drive IC (not shown).

Here, as is well known, the lower substrate 1a is larger than the upper substrate 1b, and a driving pin for receiving a driving signal applied from the PCB to the extra space left after being bonded to the upper substrate 1b (not shown). Not exposed). The PCB 2 is provided with electrode terminals (not shown) for applying a driving signal to each of the driving pins of the liquid crystal panel 1. In addition, the TCP (3) equipped with the drive IC is arranged with a plurality of leads (not shown) connected to the drive IC and extending to the edge portion thereof.

Therefore, the leads provided in the TCP 3 are electrically connected to the driving pins of the liquid crystal panel 1 and the electrode terminals of the PCB 2, respectively. Accordingly, the driving signal applied from the PCB 2 is the TCP ( It is applied to the liquid crystal panel 1 through the leads provided in 3).

Although not shown, an anisotropically conductive film (ACF) is mainly used to electrically connect the lead of the TCP and the electrode terminal of the PCB, and the ACF is a plurality of conductive resins in the adhesive resin. The ball is dispersed, transparent and has the property of conducting only in the vertical direction.

However, the above-described conventional liquid crystal display module has a problem in that the characteristics of the liquid crystal display module are deteriorated and defective due to misalignment because it is difficult to check the alignment between them after the connection between the TCP and the PCB.

In addition, after connecting the leads of the TCP and the electrode terminals of the PCB by using the ACF, in order to check the adhesion state between them, after irradiating a predetermined light on the bonding portion between the TCP and the PCB, the color of the reflected light is determined. Since the adhesion state between them is checked, it is very difficult to check the adhesion state between the TCP and the PCB.

Accordingly, the present invention has been made to solve the above problems, to provide a TCP provided with a test mark that can easily check the alignment and adhesion state between the TCP and the PCB, an object thereof.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a liquid crystal display module in which TPC is used in the prior art.

2 and 3 are views for explaining the T, C, P with a test mark according to the present invention.

(Explanation of symbols for the main parts of the drawing)

10: first hole 20: second alignment mark

30: second hole 50: test mark

100 T / P

In order to achieve the above object, the present invention is provided with the alignment marks of a predetermined form on the PCB portion bonded to the TCP, each side edge of the TCP portion bonded to the PCB to check the alignment state with the PCB A first hole is provided, and an alignment mark having the same shape and size as the alignment mark provided in the PCB is provided in the first hole. A second hole for checking the adhesion state between the TCP and the PCB is provided at the center of the alignment mark provided in the first hole.

In the above, after attaching the TCP on the PCB under the intervening of the ACF, the degree of overlap between the alignment mark provided on the PCB and the alignment mark provided on the PCB through the first hole provided in the TCP, The degree of alignment can be checked, and the adhesion between the TCP and the PCB can be checked by observing the degree of distortion of the conductive balls dispersed in the ACF through the second hole.

According to the present invention, by providing a test mark for checking the alignment and adhesion state of the PCB to the TCP portion bonded to the PCB, it is possible to prevent the degradation of the characteristics of the liquid crystal display module due to misalignment and poor adhesion between the TCP and the PCB. Can be.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 is a view showing a TCP provided with a test mark according to the present invention, Figure 2 is a view showing the position of the test mark, Figure 3 is a view for explaining the test mark of the present invention.

First, as shown in Figure 2, the TCP 100 of the present invention is provided with a test mark 50 for checking the alignment and adhesion state with the PCB on each side edge of the portion bonded to the PCB (not shown) do. Here, the PCB is provided with alignment marks (hereinafter referred to as “first marks”) of the “+” shape on the upper surface thereof, and the PCB and the TCP have the same alignment mark as that of the PCB and the test mark provided in the TCP. Attached to be placed.

As illustrated in FIG. 2, the test mark 50 may include a first hole 10 having a predetermined size and an alignment mark having a “+” shape provided in the first hole 10 (hereinafter, referred to as a second mark). And a second hole 30 provided at the center of the second mark 20. Here, the first hole 10 and the second mark 20 are provided to check the alignment with the PCB. The second hole 30 is provided to check the adhesion state with the PCB, in particular, the second mark 10 is provided in the same shape and size as the first mark of the "+" shape provided on the PCB board. do.

Therefore, after attaching the PCB with the test mark of the present invention and the PCB with the first marks under the interposition of the ACF, since the ACF is transparent, the first mark and the TCP provided on the PCB are provided through the first hole. The degree of overlap between the provided second marks can be viewed with the naked eye, whereby the alignment between the TCP and the PCB can be easily checked.

In addition, when attaching the TCP on the PCB under the interposition of the ACF, a predetermined pressure is applied to the TCP. The conductive ball dispersed in the ACF is crushed according to the applied pressure due to the pressure. When the degree of distortion of the microscope is observed through the second hole provided in the center of the first mark, it is possible to easily check the adhesive state between the TCP and the PCB according to the degree of distortion of the conductive ball.

As described above, the TCP provided with the test mark of the present invention can easily check the alignment and adhesion state between the TCP and the PCB by using the test mark provided on the TCP after attachment with the PCB, so that the misalignment between the TCP and the PCB And deterioration of characteristics of the liquid crystal display module due to a poor connection and occurrence of a defect can be prevented.

Meanwhile, although specific embodiments of the present invention have been described and illustrated, modifications and variations can be made by those skilled in the art. Therefore, hereinafter, the scope of the utility model registration request can be understood to include all modifications and variations as long as they fall within the true spirit and scope of the present invention.

Claims (2)

T, C and P which electrically connect the liquid crystal panel and the printed circuit board, The T, C and P are provided with a first hole having a predetermined size on each side edge of the portion bonded to the printed circuit board, an alignment mark provided in the first hole, and a second hole provided in the center of the alignment mark. T. C. with a test mark, characterized in that it comprises a. The T.P. with a test mark according to claim 1, wherein the alignment mark is in the form of "+".