JPH1172778A - Liquid crystal panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stable product which obviates the peeling of electrode terminal part by enhancing the adhesion property of the electrode terminal parts for executing electrical connection to the transparent electrode layer of color filters. SOLUTION: This liquid crystal panel has a second glass substrate 4 disposed to face the pixel electrode side of a first glass substrate 1 having the pixel electrodes 2 formed to a matrix form via a layer 3 of liquid crystals, the color filters 5 without over-coating formed on the surface of the second glass substrate 4 facing the liquid crystal layer 3 and sealing layers 6 for holding the spacing between the first glass substrate 1 and the second glass substrate 4 at a prescribed spacing. A black matrix layer 52 having the good adhesion property to the second glass substrate 4 is formed on the second glass substrate 4 corresponding to the electrode terminal parts 54 projected outward from the sealing layers 6 in order to execute the electrical connection of the color filters 5 to the transparent electrode layer 52 and the electrode terminal parts 54 are formed on this black matrix layer 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel with a color filter, and more particularly to an improvement in a color filter.

[0002]

2. Description of the Related Art A conventional liquid crystal panel with a color filter will be described with reference to FIGS. FIG. 3 is a plan view of the liquid crystal panel, and FIG. 4 is an enlarged sectional view taken along line BB of FIG. In the figure, a liquid crystal panel with a color filter
A first glass substrate (opposite substrate) 31 and a TFT for display formed in a matrix on the inner surface of the first glass substrate 31
(A thin film transistor) and a first
A second glass substrate 34 facing the pixel electrode 32 side of the glass substrate 31 via a liquid crystal layer 33, and a color filter 35 without overcoat formed on a surface of the second glass substrate 34 facing the liquid crystal layer 33. And the first glass substrate 31
And a seal layer 36 for maintaining a predetermined interval between the second glass substrates 34.

A color filter 35 is formed on an inner surface of a second glass substrate 34 by RGB layers 35 formed in a matrix.
1 and the adjacent space of each RGB layer 351 and RG
Acrylic resin-based (including pigment) black matrix layer 352 formed to fill the outer periphery of B layer 351
And an RGB layer 3 including the black matrix layer 352
51, a transparent electrode layer 35 of ITO, SnO ₂ or the like covering the entire surface
Further, on the square portion of the color filter 35, an electrode terminal portion 354 for electrical connection to the transparent electrode layer 353 is protruded outward through the seal layer 36, and the second glass substrate 34 is formed. Formed directly on top.

[0004]

However, in the above-described conventional liquid crystal panel, the electrode terminal portion 354 for electrical connection to the transparent electrode layer 353 projects outward from the outer peripheral black matrix layer 352. The electrode terminal portion 354 is formed on the second glass substrate 34 in the
And the second glass substrate 34 made of elementary glass are inferior in adhesion to other resin layers. As a result, the transparent electrode layer 3 is not assembled when assembling the liquid crystal display cell or during the process.
The 53 electrode terminal portions 354 were peeled off, causing a failure of the liquid crystal panel and causing a failure to be used as a product.

The present invention has been made in view of the above points, and enhances the adhesion of an electrode terminal portion for electrically connecting a color filter to a transparent electrode layer so that the electrode terminal portion does not peel off. It is an object to provide a liquid crystal panel capable of obtaining a stable product.

[0006]

In order to achieve the above object, the present invention provides a first glass substrate, pixel electrodes formed in a matrix on an inner surface of the first glass substrate, and a first glass substrate. A second glass substrate opposed to the pixel electrode via a liquid crystal layer, a color filter without overcoat formed on a surface of the second glass substrate opposed to the liquid crystal layer, the first glass substrate and the second glass substrate; A sealing layer for holding a predetermined distance between the glass substrates, wherein the color filter comprises an RGB layer formed in a matrix on the inner surface of the second glass substrate;
In a liquid crystal panel composed of a black matrix layer formed around the outer periphery of the B layer and a transparent electrode layer covering the entire surface of the RGB layer including the black matrix layer, an electrical connection between the color filter and the transparent electrode layer is provided. Forming a black matrix layer having good adhesion to the second glass substrate on the second glass substrate corresponding to the electrode terminal portion protruding outward from the seal layer to perform connection; The electrode terminal portion is formed thereon.
Therefore, in the liquid crystal panel of the present invention, since the electrode terminal portion of the transparent electrode layer of the color filter is formed via the black matrix layer having good adhesion to the glass substrate, the adhesion of the electrode terminal portion to the glass substrate is improved. And the electrode terminal portions can be prevented from peeling off at the time of assembling the liquid crystal display cell or during the process, and a stable liquid crystal panel free from failure can be provided.

In the present invention, if the black matrix layer is formed of a resin black matrix layer, the formation of the matrix film is facilitated, and the upper area of the black matrix layer portion for forming the electrode terminal portion is increased. When the area is larger than the lower area, the formation of the electrode terminal portion on the black matrix layer becomes easy, and the adhesion to the glass substrate becomes more reliable.

[0008]

FIG. 1 is a schematic plan view of a liquid crystal panel showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along line AA of FIG. An embodiment of the present invention will be described.

1 and 2, a liquid crystal panel includes a first glass substrate (opposite substrate) 1 and the first glass substrate 1.
A pixel electrode 2 including a display TFT (thin film transistor) formed in a matrix on the inner surface of the substrate, and a second glass substrate 4 opposed to the pixel electrode 2 side of the first glass substrate 1 via a liquid crystal layer 3. A color filter 5 without an overcoat formed on a surface of the second glass substrate 4 facing the liquid crystal layer 3, a predetermined distance between the first glass substrate 2 and the second glass substrate 4, And a sealing layer 6 for sealing the layer 3.

The color filter 5 includes an RGB layer 51 formed in a matrix on the inner surface of the second glass substrate 4,
The space adjacent to the RGB layers 51 and the RGB layers 51
And an acrylic resin-based (including pigment) black matrix layer 52 formed so as to fill the outer periphery of the black matrix layer 52 and the RGB layer 51 including the black matrix layer 52.
A transparent electrode layer (common electrode for the pixel electrode 2) 53 of TO, SnO ₂ or the like.
Are provided with an electrode terminal portion 54 protruding outward through the seal layer 6 in order to electrically connect to the transparent electrode layer 53. The specific shape of the protruding electrode terminal portion 54 is not limited to a square portion, and the number of shapes can be appropriately set according to the purpose. Further, on the second glass substrate 4 corresponding to the electrode terminal portion 54, the black matrix layer 52 having good adhesion to the second glass substrate 4 is formed to extend to the position of the electrode terminal portion 54, An electrode terminal portion 54 is formed on the black matrix layer 52. The electrode terminal portion 54 is formed integrally when the transparent electrode layer 53 is formed on the entire surface of the color filter 5 by a sputtering method. In addition, the upper area of the black matrix layer 52 forming the electrode terminal portion 54 is formed. Is larger than the lower area of the electrode terminal portion 54.

According to the liquid crystal panel of this embodiment, the electrode terminal portions of the transparent electrode layer of the color filter are formed via the black matrix layer having good adhesion to the glass substrate. Adhesion with the glass substrate becomes stronger, when assembling the liquid crystal display cell or
An electrode terminal portion does not peel off during the process, and a stable liquid crystal panel free from failure can be provided. Also, by forming the black matrix layer with a resin black matrix layer, the formation of the matrix film becomes easy, and further, the upper area of the black matrix layer section forming the electrode terminal section is made larger than the lower area of the electrode terminal section. In addition, it is possible to easily form the electrode terminal portion on the black matrix layer, and it is possible to increase the adhesion to the glass substrate more reliably.

[0012]

As is apparent from the above description, according to the present invention, in the liquid crystal panel, the electrode terminals of the transparent electrode layer of the color filter are formed via the black matrix layer having good adhesion to the glass substrate. As a result, the adhesion of the electrode terminals to the glass substrate is strengthened, and the electrode terminals can be prevented from peeling off during the assembly of the liquid crystal display cell or during the process, and a stable liquid crystal panel without any failure Can be provided. Further, according to the present invention, by forming the black matrix layer with the resin black matrix layer, the formation of the matrix film is facilitated, and the upper area of the black matrix layer forming the electrode terminal is reduced by the lower area of the electrode terminal. By making the size larger, it is possible to easily form the electrode terminal portion on the black matrix layer, and it is possible to more reliably maintain the close contact with the glass substrate.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a liquid crystal panel showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional explanatory view taken along line AA of FIG. 1;

FIG. 3 is a schematic plan view of a conventional liquid crystal panel.

FIG. 4 is an enlarged sectional explanatory view taken along line BB in FIG. 3;

[Explanation of symbols]

 1: First glass substrate 2: Pixel electrode 3: Liquid crystal layer 4: Second glass substrate 5: Color filter 51: RGB layer 52: Black matrix layer 53: Transparent electrode layer 54: Electrode terminal 6: Seal layer

Claims (3)

[Claims] A first glass substrate; a pixel electrode formed in a matrix on an inner surface of the first glass substrate;
A second glass substrate facing the pixel electrode side of the glass substrate via a liquid crystal layer, a color filter without overcoat formed on a surface of the second glass substrate facing the liquid crystal layer, and the first glass substrate And a seal layer for holding a predetermined distance between the second glass substrates, wherein the color filters are formed in a matrix on an inner surface of the second glass substrate, and an adjacent space between the RGB layers is provided. And RG
In a liquid crystal panel including a black matrix layer formed around the outer periphery of the B layer and a transparent electrode layer covering the entire surface of the RGB layer including the black matrix layer, an electrical connection between the color filter and the transparent electrode layer is provided. Forming a black matrix layer having good adhesion to the second glass substrate on the second glass substrate corresponding to the electrode terminal portion protruding outward from the seal layer to perform connection; A liquid crystal panel having the electrode terminal portion formed thereon. 2. The liquid crystal panel according to claim 1, wherein the black matrix layer is a resin black matrix layer. 3. The liquid crystal panel according to claim 1, wherein the upper area of the black matrix layer forming the electrode terminal is larger than the lower area of the electrode terminal.