KR0171294B1 - Black matrix structure for color cathode tube - Google Patents

Abstract

The present invention relates to the structure of the black matrix (BM) layer of the color-brown tube, and in particular, the BM layer is formed on the outer surface of the panel, so that the light formed on the screen surface becomes relatively clear, and the contrast is improved. Since the surface resistance is reduced to facilitate the elimination of electrostatic charges, there is no need to coat a separate electrostatic scavenger to reduce manufacturing costs. The R and G phosphors and B phosphors, which form and face the electron beam, are fixed. In the panel structure formed on the inner side at intervals, the black matrix layer and the surface treatment film are doubled on the outer side of the panel to improve the contrast.

Description

Color matrix of black matrix layer

1 is a fluorescent surface structure diagram of a conventional color brown tube.

2 is a projection light distribution distribution by a conventional color brown tube.

3 is a fluorescent surface structure diagram of a color brown tube of the present invention.

4 is a projection light distribution distribution diagram according to the present invention.

* Explanation of symbols for main parts of the drawings

101: shadow mask 102: frame

104: panel 106: electron gun

107: Funnel 108,109,110: R, G, B phosphor

111: black matrix 112: surface treatment film

The present invention relates to the structure of the black matrix (hereinafter referred to as BM) of the color brown tube, and in particular, by forming the BM layer of the color brown tube on the outer surface of the panel to improve contrast and to easily eliminate the electrostatic charge on the panel surface.

As shown in FIG. 1, the conventional color-brown tube includes a panel 4 having a shadow mask frame assembly in which the shadow mask 1 is coupled to the frame 2, and an electron gun 6 on the neck portion 5; ) Is a sealed funnel (7) is configured to be sealed, the inside is a vacuum.

In addition, a fluorescent surface 3 is formed on an inner surface of the panel 4. The fluorescent surface includes a black matrix layer 11, an R phosphor layer 12, a G phosphor layer 13, and a B phosphor layer 14. And a double surface treatment film (8, 9) is formed on the outer surface of the panel (4).

The purpose of the BM layer 11 is to improve production yield and contrast by improving the purity margin, which is a range in which a landing error of the electron beam does not cause a landing error due to a change in tube manufacturing phase or operating conditions.

However, in order to obtain more improved contrast for improving the quality of the product, the method of using panel glass with low light transmittance or using a pigment attached around the phosphor core is applied, but there are problems of increasing technical difficulties and manufacturing cost. have.

The surface treatment film is coated with an anti-reflection film 9 to prevent external reflection of the glass expression because an image reflected from the outside of the panel by screen outside light interferes with the user's vision. The electrostatic charge accumulated in the panel surface by the applied high pressure and accumulated for a certain period of time causes problems such as electric check and dust adhesion of the user. This panel surface reduces the static electricity caused by lowering the resistance. In order to facilitate the coating the conductive antistatic film (10).

Referring to the operation of the conventional CRT, the electron beam from the electron gun 6 on the funnel side of the CRT is subjected to constant velocity motion toward the panel 4 and then through the shadow mask 1 to the fluorescent surface 3 by the incident electron beam. The phosphor pixels 12, 13, 14 of R, G, and B formed in (3) are excited to emit light.

The generated light is projected to the front of the screen through the panel 4, the surface treated antistatic film 8 and the antireflective film 9, wherein the projected light is the panel 4 and the surface treated film 8,9. The light formed on the front surface of the screen by the refraction and reflection of the light while passing therethrough is faded like the projection light distribution A shown in FIG. 2, so that the contrast deteriorates, and R on the fluorescent surface 3 The BM layer 11 formed between the phosphor pixels G, B improves the purity margin due to the landing error of the incident electron beam.

The antistatic film 8 formed on the outer surface of the panel 4 lowers the surface resistance of the outer surface of the panel to facilitate erasing of static charges, and the antireflective film 9 prevents external light reflection of the outer surface of the panel.

However, in the conventional color receiver, the contrast is improved by the BM (11) layer formed between the phosphor pixels in the fluorescent surface 3, but the contrast is required to further improve the quality of the product, and is generated by the phosphor excitation of the incident electron beam. As the light passes through the panel 4 and the surface treatment film, the projection light formed on the entire surface of the screen by the refraction and reflection of the light is blurred, causing a problem of poor contrast.

In addition, since the conductive antistatic film is coated to facilitate the static elimination of the outer surface of the panel 4, there is a problem in that the manufacturing process difficulty and the manufacturing cost of the product increases.

In view of this, the present invention forms a double black matrix layer and a surface treatment film on the outside of the panel to improve the contrast, thereby making the light formed on the screen surface relatively clear, and improving the surface resistance of the outside of the panel. The purpose is to facilitate the elimination of static charges by lowering.

The present invention will be described in detail with reference to FIGS. 3 and 4.

First of all, the panel 104 having the shadow mask frame assembly in which the shadow mask 101 is coupled to the frame 102 and the funnel 107 in which the electron gun 106 is enclosed in the neck portion 105 are described. In the cathode ray tube structure in which the fluorescent surface through which the electron beam is transmitted is formed inside the panel 104, and the R phosphor 108, the G phosphor 109, and the B phosphor 110 are formed at regular intervals, the panel 104 ), The black matrix layer 111 and the surface treatment film 112 were formed in duplicate so as to improve the contrast.

In the figure, reference numeral 113 denotes a deflection yoke.

Each of the phosphor pixel diameters is 150 to 200 μm, the thickness of the pixels is 100 to 300 μm, and the interval between each pixel is formed to be about 0 to 50 μm, and the size of the dot diameter of the BM layer is 100 to 200 μm. Is 80-160 micrometers, and the space | interval between each dot is formed about 50-150 micrometers.

Thus, since the BM layer 111 formed on the outer surface of the panel 104 is symmetrically formed on the phosphor pixels of the fluorescent surface, the same purity margin as in the conventional CRT formed on the inner surface of the panel 104 can be obtained. Since the light generated by the excitation of the phosphor pixels on the fluorescent surface passes through the panel 104 and absorbs the light dispersed by reflection and refraction, the light on the screen surface is relatively clear so that the contrast can be improved. do.

In addition, since the BM layer 111 has a good conductivity, the BM layer 111 facilitates erasing of the electrostatic charges (ELECTRO STATIC CHARGE) induced on the plate surface by the high pressure applied inside the CRT.

Referring to the operation of the color-brown tube according to the present invention.

The electron beam from the electron gun 106 on the funnel 107 side of the CRT is subjected to constant motion toward the panel 104 to reach the fluorescent surface via the shadow mask 101. Each of R, G, and B formed on the fluorescent surface by the incident electron beam Phosphor pixels 108, 109 and 110 are excited to emit light. The generated light is projected to the front of the screen through the panel 104, the BM layer 111 formed on the panel outer surface, and the surface treatment film 112.

At this time, the projection light passes through the panel 104 and is dispersed by the refraction and reflection effects of the light. The scattered light is absorbed by the BM layer 111 formed on the outer surface of the panel 104 to distribute the light distribution B of FIG. 4. The light formed on the front of the screen is relatively clear, and the contrast is improved.

In addition, even if the BM layer 111 is formed on the outer surface of the panel 107, the same purity margin as in the inner surface of the panel 104 can be obtained, and the surface resistance of the outer surface of the panel 104 can be lowered to facilitate the elimination of static charges. will be.

As described above, the present invention improves contrast because the BM layer is formed on the outer surface of the panel, and the light formed on the screen surface becomes relatively clear, and lowers the surface resistance of the outer surface of the panel, thereby eliminating electrostatic charge. It is an invention that can reduce the manufacturing cost because it does not need to coat a separate electrostatic eliminating film because it facilitates.

Claims (3)

In a panel structure in which R, G, and B phosphors, which are fluorescent surfaces through which an electron beam is transmitted, are formed at an inner side at predetermined intervals, a black matrix layer and a surface treatment layer are formed on the outer side of the panel so as to improve contrast. Black matrix layer structure of color CRT. The black matrix layer structure of a color brown tube according to claim 1, wherein the black matrix layer is configured such that light generated by phosphor excitation of an electron beam is transmitted to a portion free of the black matrix layer. According to claim 1, wherein the thickness of the black matrix layer is 80 ~ 160㎛, the dot (DOT) diameter or stripe (STRIPE) width of the portion without the black matrix layer is 100 ~ 200㎛, the interval between the dots or stripes Black matrix layer structure of a color-brown tube, characterized in that composed of 50 ~ 150㎛.