JPH0618931A - Color liquid crystal display panel - Google Patents

Abstract

PURPOSE:To prevent the generation of electrostatic hazards by providing transparent conductive films to the surface of polarizing plates and connecting these films to the circuit ground. CONSTITUTION:A glass substrate 21 formed with a common electrode 23 on the surfaces of color filters 22 and a glass substrate 28 formed with a-SiTFTs and pixel electrodes 27 are combined by interposing liquid crystals 33 therebetween. The surfaces of the respective glass substrates have the polarizing plates 19, 30 formed with the transparent conductive films 18, 31. The color liquid crystal display is embodied by driving the a-SiTFTs to impress electric fields to the liquid crystal molecules of the liquid crystals 33 for each of the picture elements and controlling the transmitted light of a back light. As a result, the static electricity is allowed to escape to the circuit ground by the transparent conductive films 18, 31, by which the electrostatic hazards are prevented. Then, the static electricity generated on the liquid crystal display surface is allowed to escape completely to the ground by forming the transparent conductive films and meshes on the outer surfaces of the polarizing plates and connecting the films to the circuit ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display panel, and more particularly to a polarizing plate antistatic structure.

[0002]

2. Description of the Related Art Conventionally, this type of liquid crystal display panel has a structure shown in FIGS. That is, the common electrode 8 is formed on the surface of the color filter 7 provided on the glass substrate 6, and the color filter side substrate 2 on which the alignment film 9 is formed on the surface of the common electrode 8 and the amorphous silicon provided on the glass substrate 13 ( The liquid crystal 17 is enclosed between a thin film transistor (hereinafter referred to as a-Si) (hereinafter referred to as TFT) and the TFT-side substrate 1 having the alignment film 11 formed on the surface of the pixel electrode 12, and the glass substrate 6 and the glass substrate 1 are sealed.
Polarizing plates 4 and 15 are provided on the outer surface of 3. a-SiTF
A color liquid crystal display is realized by driving T12, applying an electric field to the liquid crystal molecules of the liquid crystal 17 for each pixel, and controlling the amount of transmitted light of the backlight.

[0003]

The above-mentioned conventional polarizing plate for liquid crystal display has a drawback that static electricity is generated due to friction on the surface of the liquid crystal display panel due to the friction of the surface of the synthetic resin, so that electrostatic damage occurs in the liquid crystal display panel. . About 10% may occur as electrostatic trouble.

[0004]

According to the present invention, in a color liquid crystal display panel provided with a polarizing plate, a transparent conductive film is provided on a polarizing plate surface of a synthetic resin which easily generates static electricity and is easily charged, and is connected to a circuit ground. It is characterized by a structure that allows static electricity to escape to the circuit ground.

[0005]

The present invention will be described below with reference to the drawings. 1 is a sectional view of a liquid crystal display according to a first embodiment of the present invention. In the liquid crystal display of this embodiment, the liquid crystal 33 is interposed between the glass substrate 21 having the common electrode 23 formed on the surface of the color filter 22 and the glass substrate 28 having the a-SiTFT and the pixel electrode 27, and each combination is prepared. This structure has polarizing plates 19 and 30 in which transparent conductive films 18 and 31 are formed on the surface of a glass substrate. And a-
A color liquid crystal display is realized by driving the SiTFT and applying an electric field to the liquid crystal molecules of the liquid crystal 33 for each pixel to control the amount of transmitted light of the backlight.

According to this embodiment, the transparent conductive films 18, 31
Can discharge static electricity to the circuit ground to prevent electrostatic damage. In the figure, 20 and 29 are transparent conductive films, 24 and 26 are alignment films, and 25 is a seal.

FIG. 2 is a sectional view of the second embodiment of the present invention. In this embodiment, the transparent conductive meshes 34 and 35 are used to let static electricity escape to the circuit ground to prevent electrostatic damage, and other parts are the same as in the first embodiment.
Since the transparent conductive meshes 34 and 35 are used in this embodiment, there is an advantage that the light transmittance can be increased by 1% or more as compared with the transparent conductive film, and the display of the color liquid crystal display can be brightened.

[0008]

As described above, according to the present invention, by forming a transparent conductive film or mesh on the outer surface of a polarizing plate and connecting these to a circuit ground, all static electricity generated on the liquid crystal display surface is released to the ground. As a result, static electricity is conventionally 1 to 10 kv on the display surface.
What had occurred was improved to 0.1 kv or less, and even if it was 10% or more as an electrostatic trouble, it was improved to 1% or less.

[Brief description of drawings]

FIG. 1 is a sectional view of a liquid crystal display panel according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a liquid crystal display panel according to a second embodiment of the present invention.

3A is a schematic view of a conventional liquid crystal 2 display panel, and FIG. 3B is a sectional view of a conventional liquid crystal display panel.

[Explanation of symbols]

 1 TFT side substrate 2 Color filter side substrate 4, 15, 19, 30 Polarizing plate 5, 14, 18, 20, 29, 31 Transparent conductive film 6, 13, 21, 28 Glass substrate 7, 22 Color filter 8, 23 Common Electrode 9,11,24,26 Alignment film 10,25, Seal 12,27 a-SiTFT and pixel electrode 17,33 Liquid crystal 34,35 Transparent conductive mesh

Claims (1)

[Claims] 1. A color liquid crystal display panel in which liquid crystal is sealed between a glass substrate having a common electrode formed on the surface of a color filter and a glass substrate having an a-SiTFT and a pixel electrode provided on the outside of the glass substrate. A color liquid crystal display panel characterized in that a transparent conductive film is provided on each outer surface of a polarizing plate and is connected to a circuit ground.