KR20000009402A - Image display panel having transparent antistatic film of conductive organic polymer, manufacturing method thereof and coating solution thereof - Google Patents

Abstract

PURPOSE: An image display panel having transparent antistatic film of conductive organic polymer, manufacturing method thereof and coating solution thereof is provided to enhance solution stability and storage characteristic. CONSTITUTION: The present invention discloses an image display panel having transparent antistatic film of conductive organic polymer comprising: an antistatic film(2) formed on its outer surface. The antistatic film(2) is transparent and consisted of organic polymer having electric conductive feature. And, the organic polymer contains polyethylenedioxythiophene which polystyrenesulphonate is doped in. Further, the antistatic film(2) has reflection prevention function in itself or is coated by non-reflection film.

Description

An image display face plate having a transparent antistatic film of conductive organic polymer, a manufacturing method thereof, and a coating solution thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display face plate on which a transparent antistatic film of conductive organic polymer is formed, a method for manufacturing the same, and a coating solution thereof. Specifically, the antistatic property of the outer surface of the face plate of the panel is improved, and the reflection of external light as necessary is improved. An image display face plate coated with a conductive organic polymer film suitable for preventing, in particular, an image display face plate on which a transparent antistatic film of conductive organic polymer is formed on the outer surface of the screen panel of a cathode ray tube using a conductive organic polymer and a method of manufacturing the same. And a coating solution thereof.

Regarding anti-static The widespread use of explosion-proof cathode ray tubes in recent years has eliminated the need for front protective glass, such as television sets or monitors, and as a result, the front portion of the cathode ray tube is exposed, so that a person directly touches the front portion (panel) of the cathode ray tube. It causes a problem of being strongly impacted by the high voltage static electricity charged on the panel surface when in contact. Furthermore, the charged (electrically charged) panel surface absorbs air dust and the like, which accumulates and pollutes the panel surface, causing a problem that it is difficult to see an image formed on the panel.

Taking the cathode ray tube as an example, the cause of charging is as follows.

A thin, uniform aluminum film is vacuum deposited on the phosphor attached to the inner wall of the faceplate of the glass panel of the cathode ray tube. When the power source for the cathode ray tube is turned on / off, a high anode voltage is applied to the aluminum film. Electric charges are generated on the outer wall of the panel due to the high voltage on the inner aluminum film, that is, by electrostatic induction.

Of tin oxide in the alcoholic solution of the conventional method, an alkoxysilane [Si (OR) _4, R is an alkyl group; a cathode ray tube front such as television surface, and a variety of video display devices to provide anti-static properties to the surface of the image display panel, After applying a suspension obtained by mixing at least one of indium oxide and antimony oxide, a method of forming an antistatic film on an outer surface by heat-treating the applied panel at a relatively low temperature is widely used. (Patent No. 2713)

However, this method has a lot of problems in manufacturing cost because the price of the metal oxide is quite high.

In addition, the metal oxide is present in the dispersed state in the alcohol solution, depending on the environment there is also a problem that occurs due to precipitation between particles.

The present invention is applied to a solution obtained by dissolving an organic conductive organic polymer in an aqueous solution, and then heat-treated the coated panel at a relatively low temperature to form an antistatic film on the outer surface of the conductive organic polymer by applying a film having an antistatic function An object of the present invention is to provide an image display face plate having a transparent antistatic film, a method of manufacturing the same, and a coating solution thereof.

1 is a side view showing an image display face tube formed with a transparent antistatic film of an organic conductive polymer according to the present invention;

Figure 2 is a graph showing the results of the electrical conductivity and film strength according to the concentration of the organic conductive polymer solution of the present invention.

<Description of Major Symbols Used in Drawings>

1: CRT 2: Antistatic film

3: anti-reflective coating 4: explosion-proof reinforcement band

In order to achieve the above object, the image display face plate according to an embodiment of the present invention is characterized in that the antistatic film is a film of organic polymer having a transparent and electrically conductive.

The present invention also provides a conductive organic polymer solution prepared by dissolving a conductive organic polymer in pure water and adding a silane coupling agent to enhance adhesion, and then adding a cosolvent in consideration of the evaporation rate. The present invention provides a method for manufacturing an image display face plate having a transparent antistatic film of conductive organic polymer, which is prepared by coating the outer surface of the image display face plate.

As an example, the conductive organic polymer solution is applied to the outer surface of the panel by spin coating, spray coating, dip coating, or a combination of these coatings, and is formed by heating the resulting coating film at about 180 ° C.

The conductive organic polymer of the antistatic film may contain polyethylene dioxythiophene doped with polystyrene sulphonate, and the antistatic film of the organic polymer has an antireflection function by itself. An antireflective coating may be formed on or above it.

In addition, the conductive organic polymer solution preferably contains 5 to 85% of a co-solvent in consideration of the evaporation rate, gamma-glycidoxy propyl trimethoxysilane, gamma-glycidoxy propyl. Γ-Glycidoxy propyl methyl diethoxy silane, gamma-glycidoxy propyl triethoxy silane, beta- (3,4-epoxycyclohexyl) ethyltrimethock It contains 0.1-5% of at least one silane coupling agent in seed silane (β- (3,4-Epoxycyclohexyl) ethyltrimethoxy silane).

An embodiment is described below with reference to FIG. 1.

The antistatic film 2 is formed in the panel surface of the CRT1. The grounded explosion-proof reinforcing band 4 is brought into contact with the antistatic film 23 to bring the entire surface of the film to zero potential.

The antistatic film 2 according to the embodiment of the present invention is formed by the following method.

That is, polyethylene dioxythiophene (PEDT / PSS) doped with polystyrene sulphonate (PEDT / PSS) was prepared by using a 1.3% solids aqueous solution, and the solution was 5% (solids 0.065%) to 50%. The electrical conductivity and the film strength characteristics were examined by varying the content to (solid content 0.65%).

As a crosslinking agent (silane coupling agent), gamma-glycidoxy propyl trimethoxysilane, gamma-glycidoxy propyl methyl diethoxy silane, and gamma-glycidoxy Γ-Glycidoxy propyl triethoxy silane, beta- (3,4-epoxycyclohexyl) ethyltrimethoxy silane (β- (3,4-Epoxycyclohexyl) ethyltrimethoxy silane) 1.5% was used, and in consideration of the evaporation rate of the solution, isopropanol (IPA) and enmethyltupyrrolidone (NMP) were selected and added.

Next, the conductive solution is dropped on the panel of the CRT 1 rotating at 130 rpm with the panel surface placed thereon to form a thin and uniform antistatic coating film. This spin coating is completed in about 1 minute 30 seconds. Thereafter, the antistatic coating film is heated and dried at 80 ° C., and then alkoxysilane [Si (OR) ₄ ] is spray applied onto the antistatic film to form an antireflective coating film. Finally, the coating film is baked at 180 ° C. for 30 minutes to complete the formation of the antistatic film 2 and the antireflective film 3.

As a result, there was a change in the film strength and electrical conductivity according to the concentration of PEDT / PSS and the results are shown in FIG. In FIG. 2, the solid content concentration in the PEDT / PSS solution showed a conductivity (surface resistance) of 10 ¹¹ Ω / □ at 0.065%, so that the antistatic effect could not be expected at the following concentration. In addition, at 0.65% or more, there is no increase in conductivity, but rather the film strength is lowered, thereby decreasing practicality.

In addition, the addition amount of the crosslinking agent (silane coupling agent) also improved in terms of film strength at 1.5% or more, but showed a tendency to rapidly decrease the conductive properties.

Result:

1.Surface Resistance: 5.4 × 10 ⁴ Ω / □

2. Membrane strength: 3H

According to the constitution of the image display face plate and the method of manufacturing the transparent antistatic film of the conductive organic polymer according to the embodiments of the present invention described above and the result, by using a conductive organic polymer on the image display face plate In this way, the production cost is low, and because it is not an inorganic suspension, precipitation does not occur, and it is easy to store using pure water as a dispersion medium, and also has excellent solution stability / storability. have.

Claims (10)

In the image display face plate in which the antistatic film 2 is formed on the outer surface, An image display surface plate having a transparent antistatic film of conductive organic polymer, wherein the antistatic film (2) is a transparent and electrically conductive film of organic polymer. 2. The transparent charging of the conductive organic polymer according to claim 1, wherein the conductive organic polymer of the antistatic layer 2 contains polyethylenedioxythiophene doped with polystyrenesulphonate. An image display face plate on which a protective film is formed. The image display face plate according to claim 1 or 2, wherein the antistatic film (2) of the organic polymer has an antireflection function on its own or a non-reflective coating is formed thereon. . In the manufacturing method of the image display surface plate for forming the antistatic film 2 on the outer surface of the image display surface plate, Prepared by dissolving a conductive organic polymer in pure water, adding a silane coupling agent to enhance adhesion, and then applying a conductive organic polymer solution prepared by adding a co-solvent in consideration of the evaporation rate to the outer surface of the image display panel. A method of manufacturing an image display face plate having a transparent antistatic film of conductive organic polymer, characterized in that the formed. 5. The conductive organic polymer solution according to claim 4, wherein the conductive organic polymer solution is applied to the outer surface of the face plate of the panel 2 by spin coating, spray coating, dip coating, or a combination of these coatings, and the resulting coating film is heated at about 180 캜. And a transparent antistatic film of conductive organic polymer is formed. The image of claim 4 or 5, wherein the conductive organic polymer solution contains 0.13 to 0.65% of a polystyrene sulfonate-doped polyethylenedioxythiophene as a solid content. Manufacturing method of display faceplate. The method for manufacturing an image display face plate according to claim 4 or 5, wherein the conductive organic polymer solution contains 5 to 85% of a cosolvent. The method of claim 4 or 5, wherein the conductive organic polymer solution is gamma-glycidoxy propyl trimethoxysilane (γ-Glycidoxypropyltrimethoxysilane), gamma-glycidoxy propyl methyl diethoxy silane (γ-Glycidoxypropylmethyldiethoxysilane), At least one of glycidoxy seed propyl triethoxy silane (γ-Glycidoxypropyltriethoxysilane) and beta- (3,4-epoxycyclohexyl) ethyltrimethoxy silane (β- (3,4-Epoxycyclohexyl) ethyltrimethoxysilane) 0.1 to 5% of a silane coupling agent is contained, The manufacturing method of the image display face plate characterized by the above-mentioned. In the antistatic film coating solution of the image display faceplate for applying to the outer surface of the image display faceplate to form the antistatic film 2, A conductive organic polymer solution for applying an antistatic film to an image display panel, which is prepared by dissolving a conductive organic polymer in pure water, adding a silane coupling agent to enhance adhesion, and then adding a cosolvent in consideration of the evaporation rate. 10. The method according to claim 9, wherein the conductive organic polymer solution contains 0.13 to 0.65% of polystyrene sulfonate-doped polyethylenedioxythiophene as a solid, 5 to 85% of a cosolvent, and gamma-glycidoxy seed profile tree. Γ-Glycidoxypropyltrimethoxysilane, gamma-glycidoxy propyl methyl diethoxy silane (gamma-glycidoxypropyltriethoxysilane), gamma-glycidoxypropyltriethoxysilane, beta- (3,4- Epoxycyclohexyl) Ethyltrimethoxysilane (β- (3,4-Epoxycyclohexyl) ethyltrimethoxysilane) at least one of the silane coupling agent containing 0.1 to 5%, characterized in that the conductive film coating conductive film Organic polymer solution.