KR19980076677A - Large area liquid crystal display and manufacturing method - Google Patents

Abstract

The present invention relates to a manufacturing method and a structure of a large area liquid crystal display device, which prevents the connecting portion of the large area liquid crystal display from being observed by the eyes, maintains the luminance distribution uniformly, and improves the aperture ratio. There is a purpose.

In the large-area liquid crystal display of the present invention, a width of the black matrix of d3 having a width smaller than d2 is formed between the width of the black matrix of d2 and the black matrix of d2 based on the width of the black matrix of the attaching portion. do.

In addition, the widths of the color filters 130 formed on the widths d2 and d3 of the black matrix 135 respectively have two types of widths, and the color filters 130 alternately on the widths d2 and d3 of the black matrix alternately. To be deployed.

By constructing the color filter and the black matrix as described above, the aperture ratio is improved, the bonding portion of the substrate is not easily observed, and the luminance distribution is kept uniform over the entire surface of the substrate.

Description

Large area liquid crystal display and manufacturing method

Liquid crystal display devices are widely used in information and communication fields such as TVs, game devices, computers, and the like.

The liquid crystal display device is thin, light, and can be driven with low power consumption, and has high characteristics of realizing high quality.

In particular, a method of increasing the quality of the liquid crystal display device has been developed such that the liquid crystal display device can be used in a large TV, a guide display device, a computer having a large screen, or the like installed in a museum, a train station, an airport, or the like.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a large liquid crystal display, and relates to a large screen by joining a plurality of small liquid crystal panels.

The liquid crystal display having the large screen includes a structure published by LCD Corporation of Japan in 1995 in the LCD INTERNATIONAL.

1, 2, and 3 show a liquid crystal display device having the large screen as an example.

FIG. 1 is a plan view of a liquid crystal display having a large screen by constituting the liquid crystal panels 1a and 1b and then connecting the liquid crystal panels 1a and 1b to each other.

FIG. 2 is an enlarged view of FIG. 1 and illustrates a pattern form of a color filter 30 formed in a matrix and a black matrix 35 formed in a boundary region of the color filter.

3 is a cross-sectional view taken along line III-III of FIG. 1.

A liquid crystal display device having the large screen will be described in more detail with reference to FIGS. 1 to 3.

The transparent substrate 10 having the color filters 30 and the black matrix 35 formed on the matrix, and the transparent substrate 20 formed with the pixel electrodes 8 formed on the matrix in a pattern shape similar to the color filter and the switching element 15 in contact with the pixel electrodes are separated from the spacers 50 and the seal 60. The liquid crystal panels 1a and 1b are formed by bonding the liquid crystal panels 40 to each other by using the light source and the like, and injecting and sealing the liquid crystals 40 into the bonded spaces.

Cutting or grinding the surfaces to be pasted of the liquid crystal panels 1a and 1b for precise processing;

Bonding the processed surfaces constitutes a liquid crystal display device having a large screen.

The widths W1, W2, and W3 of the black matrix 35 of the liquid crystal display having the large screen are formed almost uniformly at about 440 mu m.

Then, the width of the seal printed on the substrate is formed to about 150 mu m in the area of the black matrix.

However, the conventional liquid crystal display device having a large screen has a problem of small aperture ratio.

Although the aperture ratio is generally influenced by the area occupied by the black matrix, when the aperture ratio is low, it is difficult to realize a high quality liquid crystal display device.

In the conventional liquid crystal display having a large screen, the ratio of the area occupied by the black matrix is high and the aperture ratio is low. The reason for this will be described with reference to FIG.

Since the seal 60 of the liquid crystal panel and the portion to which the liquid crystal panel is joined in FIG. 4 is composed of two lines, the width D1 of the boundary region of the color filter 30 of the portion to be bonded is the width D2 of the boundary region of the color filter 30 of the other portion. Wider.

Therefore, in the structure of FIG. 4, the width of the black matrix shielding the portion D1 should be formed wider than the width of the black matrix shielding the portion D2.

In the large-area liquid crystal display having the black matrix pattern as shown in FIG. 4, since the edge portion of the large area is wider than that of the other portion, this portion is clearly observed and the image quality of the liquid crystal display is deteriorated.

In order to prevent the bonded edge portion of the liquid crystal panel from being observed by the eyes as described above, the conventional large-area liquid crystal display device determines the pattern width of the black matrix consistently with the width W1 of the bonded edge portion as shown in FIG. 2. .

Therefore, in the liquid crystal display having the large screen of the related art, the area in which the color filter is shielded by the black matrix 35 increases, and the aperture ratio decreases accordingly.

The present invention is to form a liquid crystal display device having a large screen by pasting the liquid crystal panel, to form a color filter of at least two types in order to increase the aperture ratio while maintaining the conventional uniform luminance distribution, so as to have a constant period To place.

In addition, the width of the black matrix formed at the boundary of the color filter is formed in at least two kinds of sizes, and is arranged to have a constant period.

More specifically, the width of the black matrix formed at the boundary of the color filter based on the width of the black matrix formed at the boundary where the liquid crystal panel is joined is not determined uniformly, and the reference width is between the widths of the reference black matrix. Allow smaller black matrices to be formed.

That is, the black matrix is formed such that the width of the reference black matrix and the width of the smaller black matrix are alternately arranged.

Therefore, the area of the color filter increases as the area of the black matrix becomes smaller, thereby increasing the aperture ratio of the liquid crystal display device, and the optical seam is not easily observed by the bonding portion of the substrate, and the luminance distribution is uniform in all parts of the substrate. The quality of the screen is improved.

As can be seen from the above description, an object of the present invention is to provide a method for manufacturing a large-area liquid crystal display device in which the luminance distribution is uniform, the bonding of the substrate is not observed, and the aperture ratio is improved.

It is another object of the present invention to provide a large-area liquid crystal display device having a uniform luminance distribution, no bonding portion of the substrate, and improved aperture ratio.

1 is a plan view of a conventional large area liquid crystal display device;

2 is a partially enlarged view of FIG. 1;

3 is a cross-sectional view of FIG. 1,

4 is a plan view for explaining a pattern of a conventional black matrix,

5, 6, 8, 9, and 10 are cross-sectional views for explaining an embodiment of the present invention.

7A to 7C are plan views illustrating patterns of color filters and black matrices in an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1a, 1b, 400: liquid crystal panel 8, 108: pixel electrode

10, 20, 100, 200: transparent substrate 15, 115: TFT

30, 130: color filter 35, 135: black matrix

40, 140: liquid crystal 50, 150: spacer

60, 160: Seal

In the large-area liquid crystal display of the present invention, a color filter having at least two kinds of sizes is disposed on the first substrate to have a predetermined period, and the width of the black matrix formed at the boundary of the color filter has at least two kinds of sizes. , It is arranged to have a constant period.

The pixel substrate is formed on the second substrate.

The first substrate and the second substrate are bonded to face each other to form a liquid crystal panel, and a plurality of the liquid crystal panels are joined together.

In particular, the width of the black matrix formed on both sides of the bonded boundary of the liquid crystal panel is 400 μm or less, and the width of the black matrix formed on the boundary of the color filter is 400 μm or less based on the width of the black matrix formed on both sides of the boundary line. do.

The pattern formation method of the black matrix, etc. will be described in detail in the embodiment.

EXAMPLE

An embodiment of the present invention will be described with reference to FIGS. 5 to 10.

First, as shown in FIG. 5, a TFT 115 used as a switching element or the like and a pixel electrode 108 connected to the TFT are formed in a predetermined pattern shape (a matrix pattern similar to a color filter formed on the transparent substrate 100).

Subsequently, as shown in FIG. 6, a matrix-like black matrix 135 is formed on the transparent substrate 100, and a color filter 130 bordering on the black matrix 135 is formed.

As shown in FIG. 7A (the top view of FIG. 6), the black matrix has a width of 200 μm in consideration of the printing error of the seal when printing a seal having a width of 150 μm thereafter. The d2 region is formed to have a width of 400 µm based on the black matrix width (2 x d1) of the bonding portion when the substrate is bonded to each other, and the d3 region is formed to have a width of about 200 µm.

The d3 region may be formed to have a size smaller than 400 μm, and may be formed to have a minimum width capable of forming a pattern.

That is, the width of the black matrix of d2 formed on the basis of the width of the black matrix of the joining portion and the width of the black matrix of d3 formed of the width smaller than d2 are alternately arranged to have periodicity.

The widths of the color filters 130 respectively formed on the widths d2 and d3 of the black matrix 135 have two kinds of sizes, and the color filters 130 having the two kinds of sizes have the widths d2 and d3 of the black matrix. It becomes a structure arrange | positioned alternately so that it may have periodicity as a boundary.

Therefore, the width of the black matrix is not uniformly formed on the basis of the width of the black matrix of the joining of the substrate as in the prior art, and the area of the color filter is widened because the narrow portion is formed between the substrates. The splice of is not easily observed by the eye due to the visual characteristics and the luminance distribution is kept uniform.

7B and 7C are structures illustrating other pattern shapes of the color filter, and may be manufactured in various pattern forms.

Area C of FIGS. 6 and 7A to 7C is a part for cutting and removing the liquid crystal panel before bonding the substrates together to form a liquid crystal panel.

Subsequently, the seal 160 is printed on the substrate on which the color filter 130 and the black matrix 135 are formed, and the substrate is configured to have the structure of FIG. 8 by dispersing a spacer 150 that maintains the cell gap when the substrate is bonded.

The seal 160 is printed with a width of about 150 μm, and in particular the seal printed on the side to which the substrate is bonded is allowed to print in the d1 area.

After the above process, the substrates of FIGS. 5 and 8 are bonded together, the liquid crystals 140 are injected, and the liquid crystal injection holes are sealed to form the liquid crystal panel 400 having the structure of FIG. 9.

When a plurality of liquid crystal panel 400 is configured, the C region of the liquid crystal panel 400 is precisely cut and removed, and the liquid crystal panel 400 is connected to each other to form a large area liquid crystal display having the structure of FIG. 10.

In the conventional large-area liquid crystal display, as shown in FIG. 2, the width of the black matrix of other parts is adjusted in accordance with the width W1 of the black matrix formed at the boundary of the liquid crystal panel so that the seam of the seam is not observed. Form uniformly.

When the black matrix is formed as described above, the opening ratio decreases due to an increase in the area of the black matrix.

The present invention is a d3 having a width smaller than d2 between the width d2 and d2 of the black matrix formed on the basis of the width (2 × d1) of the black matrix of the connecting portion in order to improve the problem that the opening ratio is lowered Allows the width of the black matrix to be formed.

The widths of the color filters respectively formed on the basis of the width of the black matrix have two kinds of sizes, and the two types of color filters 130 are alternately arranged on the basis of the widths d2 and d3 of the black matrix. do.

By constructing the color filter and the black matrix as described above, there is an effect that the area of the color filter is increased by that much;

In addition, there is an effect that the luminance distribution is uniformly maintained over the entire surface of the substrate without being easily observed by the seam of the substrate by the optical illusion.

Claims (7)

A color filter having at least two kinds of sizes is arranged and formed to have a predetermined period, and the structure of the black matrix formed at the boundary of the color filter has at least two kinds of sizes and is arranged to have a predetermined period. And a first substrate and a second substrate including a pixel electrode are joined to face each other to form a liquid crystal panel, and a plurality of liquid crystal panels are joined to each other. The method of claim 1, And a black matrix formed on both sides of the boundary line to which the liquid crystal panel is connected, and a seal is formed on the black matrix formed on both sides of the boundary line with a predetermined width. The method of claim 1, A large area liquid crystal display device, wherein the width of the black matrix formed on both sides of the boundary line to which the liquid crystal panel is attached is 400 μm or less. The method of claim 1, A large area liquid crystal display device, wherein the width of the black matrix formed at the boundary of the color filter is 400 μm or less. A first substrate including a color filter and a black matrix, The second substrate including the pixel electrode is bonded to face each other to form a liquid crystal panel, In the manufacturing method of a large-area liquid crystal display device formed by the liquid crystal panel is pasted, The color filter of the second substrate has at least two kinds of sizes and is formed by being arranged at regular intervals, A method of manufacturing a large area liquid crystal display device, characterized in that the width of the black matrix formed at the boundary of the color filter is at least two types and is arranged at regular intervals. The method of claim 5, And a width of the black matrix of the boundary portion to which the liquid crystal panel is attached is 400 μm or less. The method of claim 5, A method of manufacturing a large area liquid crystal display device, characterized in that the width of the black matrix formed at the boundary of the color filter is formed to 400㎛ or less.