KR101255699B1 - Liquid crystal display of fringe field switching mode - Google Patents

Abstract

The present invention is to remove or minimize the black matrix on the source / drain bus line to increase the aperture ratio and to improve the bonding process, and comprises a color filter substrate and a plurality of pixel regions, each pixel region is flat ) A common electrode, a plurality of slit-shaped pixel electrodes facing the common electrode, and a metal electrode formed to be positioned between the common electrode and the source / drain bus line in a lower region of the common electrode, each pixel region The present invention provides a liquid crystal display of a fringe field switching mode including an array substrate on which source / drain bus lines are disposed, and a liquid crystal layer filled between the color filter substrate and the array substrate.

LCD, FFS, Black Matrix

Description

Liquid crystal display of fringe field switching mode

1 is a cross-sectional view schematically illustrating a liquid crystal display of a conventional fringe field switching mode.

2 is a plan view schematically illustrating a liquid crystal display of a conventional fringe field switching mode.

3 is a schematic cross-sectional view of a liquid crystal display device in a fringe field switching mode according to an embodiment of the present invention.

4 is a plan view schematically illustrating a liquid crystal display of a fringe field switching mode according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS (S)

100: backlight unit 210: array substrate

211: metal electrode 220: color filter substrate

230: liquid crystal layer BM: black matrix

pixel: pixel electrode Vcom: common electrode

S / D: Source / Drain Bus Line

The present invention relates to a liquid crystal display device of the fringe field switching mode, and more particularly to a liquid crystal display device of the fringe field switching mode in which the aperture ratio is increased.

In the liquid crystal display device, a liquid crystal material having an anisotropic dielectric constant is injected between the upper transparent insulating substrate and the lower transparent insulating substrate, and the molecular arrangement of the liquid crystal material is changed by adjusting the intensity of the electric field formed in the liquid crystal material. A display device expresses a desired image by adjusting the amount of light transmitted through a transparent insulating substrate. As a liquid crystal display device, a thin film transistor liquid crystal display device (TFT LCD) using a thin film transistor (TFT) as a switching element is mainly used.

The liquid crystal display of the fringe field switching mode (FFS) has been proposed to improve the aperture ratio and transmittance of an inplane switching (IPS) liquid crystal display.

1 is a cross-sectional view schematically showing a liquid crystal display of a conventional fringe field switching mode, and FIG. 2 is a plan view schematically showing a liquid crystal display of a conventional fringe field switching mode.

1 and 2, the liquid crystal display of the fringe field switching mode includes an array substrate 21, a color filter substrate 22 having a black matrix BM, and a liquid crystal layer 23 between two substrates. The back surface unit 10 is disposed.

The array substrate 21 has a plurality of flat electrode Vcom and a rod-shaped pixel electrode pixel, which are a kind of island pattern structure, formed in each pixel area so as to be spaced apart from each other. . Source / drain bus lines S / D are disposed between the pixel regions.

The slit-shaped pixel electrode has a structure in which it overlaps with the common electrode Vcom in the state where the insulator is interposed. Therefore, since the transverse electric field is formed at several 수 intervals unlike the transverse electric field type liquid crystal display device, the transverse electric field is strong, the liquid crystal molecules on the electrode can be arranged by the transverse electric field, and the white luminance can be increased to increase the aperture ratio. .

However, the liquid crystal display of the conventional fringe field switching mode, as shown in Figure 2, in order to prevent light leakage occurring between the width of the source / drain bus line (S / D) and the common electrode (Vcom). Since the black matrix BM is formed in this manner, the black matrix BM has a problem that the aperture ratio is greatly reduced.

Accordingly, an aspect of the present invention is to provide a fringe field switching mode liquid crystal display device capable of increasing or increasing the aperture ratio by removing or minimizing the black matrix on the source / drain bus line.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to an aspect of the present invention, a liquid crystal display device of a fringe field switching mode includes a color filter substrate having a black matrix, and a plurality of pixel regions, wherein each pixel region is flat. A common electrode having a shape of a), a pixel electrode having a plurality of slits facing the common electrode, and a metal electrode formed to be positioned between the common electrode and the source / drain bus line in a lower region of the common electrode, And an array substrate on which source / drain bus lines are disposed between the pixel regions, and a liquid crystal layer filled between the color filter substrate and the array substrate.

Specific details of other embodiments are included in the detailed description and the drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.

Hereinafter, an inspection apparatus for a liquid crystal display panel according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view schematically showing a liquid crystal display of the fringe field switching mode according to an embodiment of the present invention, and FIG. 4 is a plan view schematically showing the liquid crystal display of the fringe field switching mode according to an embodiment of the present invention. to be.

3 and 4, the liquid crystal display of the fringe field switching mode according to the exemplary embodiment of the present invention includes an array substrate 210, a color filter substrate 220 having a black matrix (BM), and two substrates. The liquid crystal layer 230 filled therebetween is configured to include a backlight unit 100 that emits light.

The array substrate 210 is composed of a plurality of pixel areas.

Each pixel region includes a flat common electrode Vcom, a plurality of slit pixel electrodes facing the common electrode Vcom, and a common electrode (Vcom) in a lower region of the common electrode Vcom. Vcom) and a metal electrode 211 formed to be positioned between the source / drain bus line S / D. Source / drain bus lines S / D are disposed between each pixel area.

The metal electrode 211 is formed in a corresponding area to prevent light leakage between the source / drain bus line S / D and the common electrode Vcom.

One embodiment of the present invention can be modified into various forms of preferred embodiments as follows.

First, a pattern is interposed between the metal electrodes 211 to minimize the influence of the source / drain bus lines S / D.

Second, when two adjacent metal electrodes 211 are connected to each other to secure an overlay margin.

Third, the source / drain bus line S / D is spaced apart from the metal electrode 211 to minimize the influence of the source / drain bus line S / D on the metal electrode 211, and black between them. This is the case covered by the matrix BM.

Here, when the top view is viewed from the top, the two metal electrodes 211 and the source / drain bus lines (S / D) having the source / drain bus lines S / D positioned at both sides of the black matrix BM may be provided. A certain gap is generated between S / D), and the width of the black matrix BM becomes small. In this case, since the width of the black matrix BM is smaller than that of the conventional technique, the right and left bonding processability may be improved as compared with the conventional technique.

Fourth, the metal electrode 211 is floated to minimize the influence of the source / drain bus lines S / D.

In the related art, the black matrix BM covers the upper portion of the region, and thus, it is inevitable that the aperture ratio decreases.

However, according to preferred embodiments of the present invention, by placing the metal electrode 211 between the source / drain bus line S / D and the common electrode Vcom, the area of the black matrix BM is extended to expand the aperture ratio. It is possible to prevent the light leakage by blocking the light leakage area without reducing the.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

The liquid crystal display of the fringe field switching mode according to the preferred embodiment of the present invention as described above may remove or minimize the black matrix on the source / drain bus line to increase the aperture ratio and improve the bonding processability.

Claims (1)

A color filter substrate having a black matrix; A plurality of pixel regions, a source / drain bus line is disposed between each pixel region, each pixel region having a flat common electrode and a plurality of slits facing the common electrode A pixel electrode, a metal electrode formed in a lower region of the common electrode between the common electrode and the source / drain bus line, wherein the metal electrode is electrically connected to the common electrode, and the metal electrode and the source The drain bus line may include: an array substrate overlapping each other to prevent light leakage between the metal electrode and the source / drain bus line; And And a liquid crystal layer filled between the color filter substrate and the array substrate.

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