KR200258083Y1 - Apparatus for liquid crystal display - Google Patents

Abstract

The present invention relates to a liquid crystal display device, wherein a horizontal pad portion and a vertical pad portion are formed in each of the upper side edge portion and the right side edge portion of a panel, wherein the horizontal pad portion or the vertical pad portion has at least two areas. At least one alignment mark is located, at least one alignment mark is located in an area where the horizontal pad portion and the vertical pad portion overlap, and at least one alignment mark is located in the horizontal pad portion or at the distal end of the vertical pad portion. Is located apart from the outermost edge of the panel by a predetermined distance or more, by placing the alignment mark at a low risk of breakage can reduce the defects caused by the breakage of the alignment mark, thereby improving the yield It can be.

Description

Liquid Crystal Display {APPARATUS FOR LIQUID CRYSTAL DISPLAY}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of improving the yield by changing the position of the alignment mark on the substrate pad portion or by planting a preliminary mark.

A liquid crystal display device, which is a kind of flat panel display device, is a display device that realizes an image by changing an optical anisotropy of a liquid crystal by applying an electric field to a liquid phase and a solid phase intermediate material called liquid crystal, and has a lower power consumption than a conventional cathode ray tube (CRT). It is widely used because it is easy to thin in weight, large in size and high in size.

Such a liquid crystal display device is formed by sealing a liquid crystal in a space between the lower substrate to which the electrode is connected to the switching element and the upper substrate on which the color filter layer is formed. Since the panel of the liquid crystal display device does not emit light by itself, it is used in the form of a module having a backlight on the bottom of the lower substrate.

The module of the conventional liquid crystal display device is manufactured through the following manufacturing process.

A manufacturing process for a conventional liquid crystal display device first forms a plurality of unit cells on which an electrode pattern, an alignment film, and the like are formed on one substrate, and then based on an alignment mark formed at corners of the unit cells. Each unit cell is cut to form a lower substrate.

Subsequently, the upper substrate on which the color filter layer and the alignment layer and the like are formed is separated into unit cells, the lower and upper substrates are bonded together, the liquid crystal is injected into the unit cells, and then sealed to form a panel of the liquid crystal display device.

Then, the panel is mounted on the module holder, and the edge of the panel is fixed through the guide hole formed in the predetermined portion of the module holder by a jig, and the printed circuit board (PCB) is aligned on the panel. Each contact terminal is connected using a zebra, and a backlight device is inserted between the panel and the printed circuit board to complete the module of the liquid crystal display device.

Subsequently, the image recognition system recognizes the alignment mark to align the panel of the liquid crystal display and the printed circuit board.

However, the conventional liquid crystal display has the following problems.

The alignment mark used to finely align the panel in the conventional liquid crystal display device, as shown in FIG. 1, the pad portion 120 on the panel 100 in which the black matrix 110 surrounds the active region 110. This alignment mark 130 is also used in the following processes: EDGE GRINDING, POLARIZER ATTACHING, CLEANING, and PANEL TESTER. However, since the alignment mark 130 is located at the corner of the pad unit 120 which is the most vulnerable to breakage of the liquid crystal panel 100, the alignment mark 130 has a high risk of damage, and the degree of damage is not severe. And the alignment mark 130 is no longer used in a subsequent process there is a problem that the yield falls.

Thus, the liquid crystal display device according to the present invention is devised to solve the problems of the prior art, the object of the present invention is to prevent the failure of the alignment mark by changing the position of the alignment mark on the substrate pad portion or through the preliminary mark. An object of the present invention is to provide a liquid crystal display device capable of improving yield.

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

2 is a plan view of a panel of a liquid crystal display according to Embodiment 1 of the present invention;

3 and 4 are plan views of the panel of the liquid crystal display according to the second embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

200,300; Panels 220,320; Pad part

230; Alignment mark 330; Bon mark

340; Preliminary mark 350; Double mark

The liquid crystal display device according to the present invention for achieving the above object is a horizontal pad portion and vertical pad portion formed on the upper side and the right side of the side of the panel, respectively, the horizontal pad portion or vertical pad portion At least two alignment marks are located in the area, at least one alignment mark is located in an area where the horizontal pad portion and the vertical pad portion overlap, and at least one alignment mark is located in the end area of the horizontal pad portion or the vertical pad portion. The alignment mark may be positioned to be spaced apart from the outermost edge of the panel by a predetermined distance or more.

In addition, the liquid crystal display device according to the present invention, at least one alignment mark of the alignment mark is a double mark consisting of the main mark and the preliminary mark, the preliminary mark of the double mark is a predetermined limit distance from the outermost edge of the panel. It is characterized by being spaced apart from the above.

Hereinafter, a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

2 is an enlarged plan view of a panel edge portion of a liquid crystal display according to Embodiment 1 of the present invention, and FIGS. 3 and 4 are enlarged plan views of a panel edge portion of a liquid crystal display according to Embodiment 2 of the present invention.

In the liquid crystal display according to the first exemplary embodiment of the present invention, as illustrated in FIG. 2, horizontal pad portions 220a and vertical pad portions 220c are formed on the upper side and right side portions of the panel 200, respectively. In the liquid crystal display device, at least two alignment marks 230 are positioned in an area of the horizontal pad portion 220a or the vertical pad portion 220b, and the horizontal pad portion 220a and the vertical pad portion ( At least one alignment mark 230 is positioned in an area 220c where 220b overlaps. In addition, at least one alignment mark (not shown) is also located in an end region of the horizontal pad portion 220a or the vertical pad portion 220b, and the alignment mark 230 is the closest outer edge of the panel 200. It is located more than a certain distance L1 or L2 from the. 2 shows only one alignment mark 230 for convenience.

Here, the alignment mark 230 is spaced apart from the nearest outer edge of the panel 200 by L1 or L2, which is a predetermined limit distance. In this case, the predetermined limit distance is preferably about 1.5 mm or more to prevent breakage of the alignment mark 230.

As such, the position of the alignment mark 230 is positioned on the panel 200 to a portion having a low risk of damage, so that the edge portion of the panel 200 is broken to prevent external damage of the alignment mark 230. Can be. In addition, it is possible to prevent damage to the alignment mark 230 or inability to recognize the image recognition system due to peeling of the glass flakes in the panel 200.

On the other hand, the liquid crystal display device according to the second embodiment of the present invention further defines the alignment mark of the first embodiment, in order to prevent damage to the main mark, the alignment mark, which is a double mark composed of the main mark and the preliminary mark, is located on the panel. . In the second embodiment of the present invention, as shown in FIG. 3, a double mark 350, that is, at least one pair of the main mark 330 and a preliminary mark (A) on one pad portion 320 of the panel 300 ( 340 is disposed. For convenience, only one double mark 350 disposed on one side of one pad part 320 is shown in the drawing.

Here, in the double mark 350 composed of the main mark 330 and the preliminary mark 340, the preliminary mark 340 is a predetermined limit distance L3 or L4 from the outermost edge of the panel 300. Are spaced apart. It has already been mentioned that the predetermined limit distance is preferably about 1.5 mm or more.

Here, the main mark 330 and the preliminary mark 340 are located together in the same pad portion 320, for example, in the area of the horizontal pad portion 320a, as shown in FIG. As shown in Fig. 4B, the vertical pad portion 320b may be located together. In addition, the main mark 330 is located on the horizontal pad portion 320a and the preliminary mark 340 may be located on the vertical pad portion 320b, or vice versa.

As such, since the main mark 330 and the preliminary mark 340 may be located in the same pad part or in different pad parts, the same pad part, for example, the horizontal pad part 320a or the vertical pad part 320b may be used as a whole. The number of the main marks 330 and the number of the preliminary marks 340 are at least three or more in total. In detail, at least two main marks 330 and one preliminary mark 340 may be located, and more than one main mark 330 may be located.

Meanwhile, since the dual mark 350 may have a different use in a subsequent process, both the main mark 330 and the preliminary mark 340 may be used for the same purpose, and may be used for different purposes.

Here, each mark 330, 340 is recognized by the image recognition system, the pattern to be recognized does not depend on the appearance of the mark but a certain pattern that can be recognized by the image recognition system. Accordingly, as shown in FIGS. 4A and 4B, at least three main marks 330 and preliminary marks positioned on the same pad portion, that is, the horizontal pad portion 320a or the vertical pad portion 320b. Although 340 is used for the same purpose, the recognition pattern may be different.

Various embodiments without departing from the spirit and principle of the present invention can be easily implemented as well as self-explanatory to those skilled in the art. Accordingly, the utility model registration claims attached to the present application are not limited to those already described above, and the utility model registration claims below include all new matters inherent in the present invention, and also in the art to which the present invention belongs. Includes all features that are treated equally by those with knowledge of

As described above, the liquid crystal display according to the present invention has the following effects.

In the present invention, by placing the alignment mark at a low risk of breakage, it is possible to reduce defects caused by the damage of the alignment mark. In addition, by planting the preliminary alignment mark on the pad portion, even if the alignment mark is broken, the subsequent process can be continued with the preliminary mark, thereby improving the yield.

Claims (10)

In a liquid crystal display device in which a horizontal pad portion and a vertical pad portion are formed on each of the upper side edge portion and the right side edge portion of the panel, At least two alignment marks are positioned in the horizontal pad portion or the vertical pad portion, and at least one alignment mark is positioned in an area where the horizontal pad portion and the vertical pad portion overlap, and the horizontal pad portion or the vertical pad portion is distal end region. At least one alignment mark is located within the liquid crystal display device, characterized in that the alignment mark is spaced apart from the nearest outer side of the panel by a predetermined distance or more. The method of claim 1, The alignment mark is a liquid crystal display, characterized in that located at least 1.5 mm away from the outermost edge of the panel. The method of claim 1, At least one of the alignment marks is a double mark consisting of a main mark and a preliminary mark, the preliminary mark of the double mark is a liquid crystal display, characterized in that spaced apart a predetermined limit distance from the outermost edge of the panel. Device. The method of claim 3, wherein The preliminary mark is positioned at a distance of 1.5 mm or more from the outermost edge of the panel. The method of claim 3, wherein Wherein the main mark and the preliminary mark are located in the same pad portion area of the panel or in different pad portion areas, respectively. The method of claim 5, The main mark and the preliminary mark located in the same pad area of the panel are used for the same purpose or for different purposes. The method of claim 6, The main mark and the preliminary mark used for the same use are the same recognition pattern or different recognition patterns, respectively. The method of claim 5, And at least three main marks and preliminary marks in the same pad area of the panel in total. The method of claim 8, The main mark and the preliminary mark are used for the same purpose, or each liquid crystal display device, characterized in that used for different purposes. The method of claim 9, The main mark and the preliminary mark used for the same use are the same recognition pattern or different recognition patterns, respectively.