KR100642856B1 - Liquid crystal display - Google Patents

Abstract

The present invention discloses a liquid crystal display device in which light leakage from a pad fan-out part is prevented. In the liquid crystal display device according to the present invention, a liquid crystal panel in which a plurality of gate bus lines and data bus lines are formed, and a liquid crystal panel in which a color filter substrate including a resin black matrix and a color filter are actually bonded under the liquid crystal layer are backlight units. A liquid crystal having a pad fan-out portion assembled to a bezel in a state of being seated in a mold frame of a liquid crystal panel, wherein a pad fan-out unit is connected to the outside of the display area of the liquid crystal panel, including a drive IC to connect the drive IC and the bus lines of the display area with metal wiring. In the display device, a light blocking metal pattern completely covering each of the areas is provided in each area between adjacent metal wires of the pad fan-out part in an area corresponding to an edge of the black matrix forming area. .

Description

Liquid crystal display

1 is a cross-sectional view of main parts of a conventional liquid crystal display.

2 is a plan view of a conventional liquid crystal panel.

3 is a plan view showing a conventional pad fan-out portion.

4 is a sectional view of principal parts of a liquid crystal display according to the present invention;

5 is a plan view illustrating a pad fan-out part in the liquid crystal display according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: lower glass substrate 2: bus line

3: metallization 4: drive IC

5 gate insulating film 6,14 polarizer

11: upper glass substrate 12: black matrix

13 color filter 20 liquid crystal molecules

22: real 30: liquid crystal panel

32: light guide plate 40: mold frame

50: bezel 60: light blocking metal pattern

A: Fan-out

The present invention relates to a liquid crystal display device, and more particularly, to a structure in which light leakage is prevented from occurring in a pad fan-out portion outside the display area.

Liquid crystal display (Liquid Crystal Display) is one of the image display mechanism, there is an advantage that can realize a lightweight, thin and low power consumption compared to the typical image display mechanism CRT (Cathode Ray Tube).

In particular, it is well known that a lot of research / development has been performed on the thin film transistor liquid crystal display device in which each pixel is individually driven by the thin film transistor, and thus the display performance is remarkably improved. The PC and monitor market is in the spotlight, and the TV market is expected to erode in the future.

Such a liquid crystal display device includes a liquid crystal panel as a display component, a backlight unit as a light source, and a driving circuit board for driving the liquid crystal panel. The liquid crystal panel includes a backlight unit. It is assembled with the backlight unit by a bezel, which is a kind of metal sash, which is seated in a mold frame, and the driving circuit board is rotated to the rear surface of the backlight unit by a flexible film connected to the liquid crystal panel.

FIG. 1 is a cross-sectional view of a main part of a conventional liquid crystal display device. As shown in FIG. 1, an array substrate and a color filter substrate manufactured by individual processes are bonded to each other under a liquid crystal layer, and the liquid crystal panel 30 includes a light guide plate 32. It is seated in the mold frame 40 of the backlight unit, and is assembled with the backlight unit by the bezel 50.

In FIG. 1, reference numeral 1 denotes a lower glass substrate, 2 a bus line, 4 a drive IC, 6 a lower polarizer, 11 an upper glass substrate, 12 a black matrix (hereinafter referred to as BM), and 13 a color filter. 14 denotes an upper polarizer plate, 20 denotes a liquid crystal molecule, 22 denotes a real substance, and A denotes a pad fan out.

Meanwhile, in the liquid crystal panel 30, each end of the gate and the data bus line, that is, the pad, is electrically connected to the corresponding gate and source drive IC. To this end, as illustrated in FIG. A pad fan out portion A is provided for electrical connection between the gate and data bus lines (not shown) and the drive IC (4).

However, the above-described conventional liquid crystal display device is increasing the brightness of the backlight unit in accordance with the demand of high brightness products as its application fields are diversified, and in addition to the resin of BM material suitable for eco-friendliness and low cost As shown in FIG. 3, in the resin BM, some light leaks from the pad fan-out part A to the region R between the metal wires 3. It causes light leakage and degrades the screen quality, which causes the defect rate to increase.                         

In particular, the pad fan-out portion A is not covered by the bezel 50 used to assemble the liquid crystal panel 30 and the backlight unit, as shown in FIG. It is a serious cause of product failure.

Accordingly, an object of the present invention is to provide a liquid crystal display device in which light leakage from a pad fan-out part is prevented.

In order to achieve the above object, the present invention provides a liquid crystal panel in which an array substrate on which a plurality of gate bus lines and data bus lines are formed, and a color filter substrate including a resin black matrix and a color filter are actually bonded under the liquid crystal layer. The pad fan-out unit is assembled to the bezel while seated in the mold frame of the backlight unit. The pad fan-out unit includes a drive IC to connect the drive IC and the bus lines of the display area to the outside of the display area by a metal wiring. In the liquid crystal display device provided, a light blocking metal pattern completely covering each of the areas is provided in each area between adjacent metal wires of the pad fan-out part in an area corresponding to an edge of the black matrix forming area. A liquid crystal display device is provided.

Here, the light blocking metal pattern is installed together in the formation of the data bus line in the gate bus line region, and in the formation of the gate bus line in the data bus line region. The light blocking metal pattern is provided under a gate bus line, a data bus line, and an insulating film, preferably, a gate insulating film.

The substance is preferably made of a thermosetting material.

(Example)

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

First, describing the technical principle of the present invention, the present invention forms a light blocking metal pattern that additionally covers an area between the metal wires between the metal wires of the pad fan-out part. At this time, in forming the light blocking metal pattern, the light blocking metal pattern is formed between the metal wires of the pad fan-out part in the data pad area in the gate pad area, and conversely, the gate bus in the data pad area. The light blocking metal pattern is formed in a region between the metal wires of the fan-out part when the line is formed.

In addition, an insulating film, preferably a gate insulating film, is interposed between the metal wiring and the light blocking metal pattern in order to prevent an electrical short between the metal wirings and the light blocking metal pattern.

In this way, even if the resin BM is applied and the brightness of the backlight unit is increased, light leakage at the pad fan-out part can be prevented by the metal wiring and the light blocking metal pattern, and thus the product reliability of the liquid crystal display device. Can be secured.

In detail, FIGS. 4 and 5 are views for explaining a liquid crystal display device according to the present invention. 1 and 3 are denoted by the same reference numerals.

4 is a cross-sectional view of main parts of a liquid crystal display according to the present invention. As shown in the drawing, the liquid crystal display device according to the present invention includes a mold frame of a backlight unit including a light guide plate 32 of a liquid crystal panel 30 as a display component. 40) has a structure assembled by the bezel 50 in a state seated in.

The liquid crystal panel 30 has a structure in which an array substrate and a color filter substrate manufactured by separate processes are bonded by an actual material 22 through an intervening liquid crystal layer composed of a plurality of liquid crystal molecules 20. 1) and polarizing plates 6 and 14 are attached to each of the outer surfaces of the upper glass substrate 11. The bus line 2 is formed on the lower glass substrate 1 of the array substrate, and the BM 12 and the color filter 13 are formed on the upper glass substrate 11 of the color filter substrate.

In addition, a drive IC 4 is provided outside the display area of the array substrate, and the drive IC is connected to pads (not shown) of the display area through the pad fan-out part A. FIG.

In particular, a light blocking metal pattern 60 is formed in the pad fan-out portion A with an insulating film, that is, a gate insulating film 5 interposed therebetween. The light blocking metal pattern 60 is formed together when the bus line 2 is formed, and the light blocking metal pattern 60 is adjacent to the pad fan-out part A in an area corresponding to an edge portion of the BM 12 forming area. It is formed to cover the area between the metal wires (3), respectively.

FIG. 5 is a plan view illustrating a pad fan-out part in the liquid crystal display according to the present invention, and as shown, between the metal wires 3 between the metal wires 3 in the pad fan-out part. The light blocking metal pattern 60 is formed so as to completely cover the area.

The light blocking metal pattern is formed together when forming a metal wiring, that is, a bus line. For example, the light blocking metal pattern is formed together when forming a data bus line in a gate pad area, and is formed together before forming a gate bus line in a data pad area. .

In this way, the present invention is a resin applied to the BM material in the pad fan-out portion outside the display area, and the light leakage as the brightness of the backlight unit is increased can be completely blocked by the light blocking metal pattern with the metal wiring. Therefore, the present invention can provide a liquid crystal display device without light leakage in the pad fan-out part.

Meanwhile, in the conventional liquid crystal display device, a material for bonding the array substrate and the color filter substrate may be UV curable material or a thermosetting material. However, the liquid crystal display device of the present invention may have a BM on top of the material. In connection with the presence of a light blocking metal pattern at the bottom, a thermosetting material is preferably applied.

As mentioned above, although specific embodiments of the present invention have been described and illustrated, modifications and variations can be made by those skilled in the art. Accordingly, the following claims are to be understood as including all modifications and variations as long as they fall within the true spirit and scope of the present invention.

As described above, the present invention further forms a light blocking metal pattern between the metal wires in the pad fan-out part, thereby applying the resin BM and increasing the brightness of the backlight unit. It is possible to prevent light leakage from the negative, thereby fundamentally solving the light leakage problem to ensure the reliability of the liquid crystal display device.                     

In addition, conventionally, a separate means such as attaching a light shielding tape should be used to prevent light leakage at the pad fan-out part. However, the present invention does not require a separate light shielding means such as a light shielding tape, thereby providing a competitive advantage of the product. Can increase.

Claims (5)

An array substrate with a plurality of gate bus lines and data bus lines, and a resin panel having a resin black matrix and a color filter, and a liquid crystal panel in which a liquid crystal panel is actually bonded under the liquid crystal layer is seated in a mold frame of a backlight unit. And a pad fan-out unit, which includes a drive IC, which connects the drive IC and the bus lines of the display area with a metal wiring, to the outside of the display area of the liquid crystal panel. In the liquid crystal display device, And a light blocking metal pattern completely covering each of the areas in each of the areas between adjacent metal wires of the pad fan-out part in an area corresponding to an edge of the black matrix forming area. The liquid crystal display device according to claim 1, wherein the light blocking metal pattern is provided together at the time of forming the data bus line in the gate bus line region and at the time of forming the gate bus line in the data bus line region. The liquid crystal display device according to claim 1, wherein the light blocking metal pattern is provided under a gate bus line, a data bus line, and an insulating layer. 4. The liquid crystal display device according to claim 3, wherein the insulating film is a gate insulating film. delete

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