JPH0393136A - Crt panel - Google Patents

Abstract

PURPOSE:To improve antistatic property and antireflective property and prevent attachment of dust, a fingerprint, etc., by forming a pattern film where a translucent electric conductor portion is installed together with a translucent dielectric portion on the outermost surface of optical multilayer film. CONSTITUTION:The CRT panel is constituted of an optical multilayer film 7 made up of medium refractivity film 2, high refractivity film 3 and low refractivity film 4 on a glass substrate 1 and a pattern film 8 where a translucent electric conductor body portion 5 communicating to the end face from the center on the surface of the optical multilayer 7 is formed like stripes in the silicone film of a translucent dielectric portion 6. In the pattern film 8 formed on the outermost surface, a linear translucent electric conductor portion 5 with a width d and the band-like translucent dielectric portion 6 with a width e are formed like stripes. The translucent electric conductor body is formed of ITO (SnO2-In2O3 at 10wt.%) film and the translucent dielectric portion 6 is formed of dimethyl polysiloxane film 8. It is thereby possible to have antireflective property, antistatic property and antifouling property and also to be used as a panel-face switch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a CRT panel that covers the screen of a CRT used as a display device for computers and the like.

[Prior Art] Conventionally, methods of coating with an optical multilayer film or roughening the surface have been known as methods of increasing anti-fJJ spinning properties on the surface of a CRT panel. It is also known to provide electrical conductivity to the outer surface of the panel to prevent charging, in order to prevent discomfort when touching the panel surface due to charge-up and to prevent dust from adhering to the panel surface. For example, there is a disclosure of a conductive anti-fouling film attached transparent plate having an antistatic function by forming two specific low refractive index dielectric films on a transparent substrate via a metal film (Japanese Patent Laid-Open No. 64-79041). Publication>
. However, a CRT panel that has good antireflection and antistatic properties is not yet known.

Furthermore, in recent years, CRT panels having panel surface switches in which switch functions are formed on the panel surface have also been known.

[Problems to be Solved by the Invention] When using an optical multilayer film in a CRT panel, the film material constituting the outermost surface layer is used to prevent image distortion due to refraction and to prevent light reflection on the surface. In order to prevent the display from becoming difficult to see, the material must have a refractive index lower than that of the glass substrate.

However, no material with low refractive index and electrical conductivity is known.

Another method is to roughen the outermost surface of the CRT panel and then coat it with a conductive material, but the roughening of the surface can only improve antireflection by about 2 to 3% at most. Furthermore, there is a problem in that the reflectance may be as high as 3% or more depending on the conductive material to be coated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a CRT panel that has antireflection properties, antistatic properties, and antifouling properties, and can also be used as a panel surface switch.

[Means for Solving the Problems] The CRT panel of the present invention is a CRT panel consisting of a glass substrate and an optical multilayer film formed on the surface of the glass substrate, and the outermost surface of the optical multilayer film has a stripe. A pattern film consisting of a linear light-transmitting conductor portion continuous in a shape or a mesh shape and a light-transmitting dielectric portion formed in a portion where the light-transmitting conductor portion is not formed. Features.

The CRT panel is an image display tube that produces images by directing electron beams onto a fluorescent screen and is used as a display device for televisions and computers. The optical multilayer film prevents diffused reflection on the surface in order to make the displayed image easier to see. Usually, films with different refractive indexes are stacked to form a multilayer film.

The patterned film formed on the outermost surface of the optical multilayer film is transparent and has a linear pattern in which the light-transmitting conductor part having electrical conductivity is continuous in a stripe or mesh shape. is formed. As for the linear pattern shape,
For example, conductive paths are formed in the form of linear, string-like, grid-like, or hexagonal-like voids that communicate from the center of the CRT panel to the ends.

This light-transmitting conductor part is surrounded by a light-transmitting dielectric part to increase the conductivity of the surface of the insulation panel and impart antistatic properties.
It can be used as a switch circuit for panel switches. This light-transmitting conductor portion is made of a metal, metal alloy, or metal oxide having a low specific resistance and is light-transmitting.

For example, ITO, It tin oxide, ALI thin film, etc. can be used. Note that when the shape of the transparent conductor part is a hexagonal shell, it is preferable that a dielectric part be formed inside the hexagonal shell in order to improve insulation and translucency.

Further, since the transparency of this light-transmitting conductor is slightly lower than that of the light-transmitting dielectric portion, it is preferable to reduce the occupied area in order to improve transparency.

Since the path of the light-transmitting conductor portion is continuously drawn out to the end face, the electrostatic potential on the surface can be lowered and charging can be effectively prevented.

The light-transmitting dielectric part is a silicone film that has water repellency and stain resistance, prevents dust and fingerprints from adhering to the surface, and also has antireflection properties, transparency, and insulating properties. This light-transmitting conductor part is made of a silicone film such as siloxane-based dimethylborisiloxane, phenylmethylborisiloxane, fluorinated alkylmethylborisiloxane, or cyanoalkylmethylborisiloxane. A pattern or shape is created by filling in the unformed parts. By making the film thickness of this light-transmitting dielectric part thinner than that of the light-transmitting conductor part, it is possible to form irregularities on the panel surface to make it rough, and to increase conductivity. It is preferable because it can further improve the preventive properties, antistatic properties, and antifouling properties. It is preferable that the difference in film thickness between the light-transmitting dielectric portion and the light-transmitting conductor portion be at least twice as large in order to enhance the above-mentioned prevention effect.

This pattern film is made by first forming a silicone film of a transparent dielectric part on the entire surface of the optical multilayer film, then etching it to form a predetermined pattern, and forming a transparent conductor part on the pattern. Alternatively, conversely, the silicone film can be formed by forming the pattern of the light-transmitting conductor part and then applying the silicone film.

[Function] This CRT panel has a patterned film in which a light-transmitting conductor portion and a light-transmitting dielectric portion are provided side by side on the outermost surface.

This light-transmitting conductor part uses conductivity to remove static electricity that accumulates on the surface of the CRT panel to the outside, and the light-transmitting dielectric part improves the transparency of the surface of the CRT panel and prevents fouling due to the characteristics of the silicone film. To make the display on the panel easier to read by imparting anti-fouling properties and antifouling properties. A panel surface switch can be formed by roughly utilizing the conductivity of the transparent conductor portion.

[Example] This will be explained in detail below using examples.

As shown in the cross-sectional schematic diagram of FIG.
I3, an optical multilayer film 7 consisting of a low refractive index film 4, and a transparent conductor portion 5 on the surface of the optical multilayer film 7 that communicates from the center to the end surface.
The pattern film 8 is formed in a stripe shape in the silicone film of the light-transmitting dielectric part 6.

The optical multilayer film 7 includes an alumina film 2 with a medium refractive index (n=1.65) with a film thickness of 83 nm and a film thickness of 110 nm from the glass substrate 1 side.
titanium oxide film 3 with a high refractive index of nm (n=2.50>
It consists of a silicon dioxide film 4 with a film thickness B of 5 nm and a low refractive index (n=1.45).

The above optical multilayer film 7 was formed using an ion plating apparatus to a film thickness calculated based on the formula 550/4n (n is the refractive index of the material). However, the titanium oxide film 3 was formed with a film thickness of 550/2n. The thickness of the silicon dioxide film 4 was obtained by subtracting 10 nm from the thickness of the silicone film 6.

The pattern film 8 formed on the outermost surface has a linear (width d) translucent conductor portion 5 and a band-shaped (width e) translucent conductor portion 5, as shown in the partially enlarged schematic perspective view of FIG. The dielectric portion 6 is formed in a stripe shape.

The transparent conductor portion 5 has a film thickness of 34 nm and a line width d of 0.1II.
II ITO (10 wt% Sn02-IrlzOx)
In Ill, the transparent dielectric portion 6 has a film thickness of 10 nm and a strip width e.
is formed of a 0.9 m dimethylpolysiloxane film 8.

To form the patterned film 8, first use an ion plating device at an oxygen partial pressure of 4. OX10-2Pa, high frequency power 30
An ITO film was formed on the entire surface of the optical multilayer film 7 under conditions of 0 W and a DC voltage of 500 V. This ITO film was subjected to plasma etching into the striped pattern shown in Fig. 2 (argon introduction pressure 3.Ox10-' Pa, high frequency power 300 W). Fig. 3 shows a schematic cross-sectional view of the ITO film.
After etching the TO film into a predetermined pattern, an n-hexane solution containing 5% by weight of boridimethylsiloxane was applied to the surface. After coating, it was dried at 60 to 70°C for 20 minutes, and then baked at 300°C for 20 minutes to form a silicone film of the transparent dielectric portion 6. This silicone film adhered to the silicon dioxide film 4, which was a low refractive index film, and had good adhesion.

This silicone film was acid-etched to remove the silicone film on the transparent conductor portion 5, thereby producing the CRT panel shown in FIG.

(Example 2) This CRT panel has the same configuration as in Example 1, except that the pattern shape of the pattern skin 1119 on the outermost surface is a hexagonal mesh. A partially enlarged schematic diagram is shown.

This pattern skin 1119 was obtained by first applying the dimethylbolysiloxane solution of Example 1 to the entire upper surface of the optical multilayer WA7 and baking it to form a silicone film of the light-transmitting dielectric portion 6. The film thickness of this silicone film was set to IQ nm. Next, the silicone was removed by acid etching to form a hexagonal pattern shown in FIG. Width of silicone film <a
> is 0.9Nn, and the line width (b) of the transparent conductor portion 5 is 0.9Nn.
It was set at 1%.

A schematic cross-sectional view is shown in FIG.

Subsequently, ITo was deposited to a thickness of 34 nm using an ion plating device to form a transparent conductor portion 5.

When the surface of this ITO film was lightly wiped with gauze containing isopropyl alcohol, the ITO layered on the silicone film was removed and a patterned film 8 having a hexagonal pattern as shown in Fig. 4 was formed. .

This ITO film had good adhesion to the silicon dioxide film 4.

(Example 3) In this case as well, a C.I.C. This is an RT panel. That is, the sixth
Electrodes are placed in the shape of f, g or h, i on the pane of the one block pattern shown in the figure, and the switch is activated by measuring the change in capacitance on the panel surface and detecting whether it is touched by a finger. We have created a panel surface switch that allows you to

This pattern film 10 is shown in FIG. 7 as shown in FIG. As shown in the enlarged schematic diagram of part q, the transparent conductor is formed into a stripe shape with a tortoise-shell-shaped void, and the end part is a comb-like pattern shape that does not communicate with both ends. The structure is such that no electrodes are formed.

The pattern film 10 was manufactured by first coating the entire surface of the optical multilayer film 7 with a silicone film in the same manner as in Example 2, and then etching to form the i-tooth-shaped pattern shown in FIG. Thereafter, the same treatment as in Example 2 was performed to form the pattern film 10. This CRT panel exhibited operability sufficient to be used as a surface switch.

(Evaluation Results) In Example 1, when the line width d of the transparent conductor part 5 and the width e of the transparent dielectric part 6 were changed, the spectrophotometer (optical path diameter 1
Table 1 shows the measurement results of anti-sword rate and transmittance using 0φm>.

While the reflectance of the surface of a CRT panel is about 8% for ordinary glass, it was less than 2% in this example, and the antireflection properties were significantly improved. Furthermore, the transmittance was 85% or more, and the transparency was hardly decreased.

Furthermore, regarding the relationship between surface potential and time difference, as shown in the graph of Figure 8, the potential drop time is short. ! Improved anti-static effect. Note that when the width d of the light-transmitting conductor portion 5 is widened and the width e of the light-transmitting dielectric portion 6 is narrowed, the reflectance and transmittance decrease slightly as shown in 2 of Table 1. This is because the transparent conductor portion 5 has a thick film thickness and has a refractive index different from that of the outermost surface of the optical multilayer film, so that its transmittance is lower than that of the transparent dielectric portion 6. This suggests that there is a limit to increasing the line width d of the transparent conductor portion 5.

Regarding the CRT panel of Example 2, the relationship between the reflection rate, transmittance, and surface potential versus time was similarly measured. The results are shown in Table 2 and Figure 8. Although the fouling rate and transmittance are slightly lower than those in Example 1, they are not at a level that poses a particular problem in use. Further, the rate of decrease in surface potential was the same as in Example 1.

Furthermore, the difference in film thickness between the silicone film 6 and the transparent conductor portion 5 makes the surface uneven and rough, further improving the antireflection effect. Since the film thickness of the transparent conductor part 5 is larger than that of the transparent dielectric part 6 and it protrudes from the surface, the effect of removing static electricity can be enhanced.

[Effects] As described above, in the CRT panel of the present invention, a pattern film in which a light-transmitting conductor portion and a light-transmitting dielectric portion are provided is formed on the outermost surface of the optical multilayer film. This pattern film improves antistatic properties and antireflection properties, prevents the adhesion of dust, fingerprints, etc., and eliminates the discomfort caused by surface scratches when touched.

In other words, the light-transmitting conductor part dissipates the surface potential and improves antistatic properties, and the siloxane film on the light-transmitting dielectric part enhances anti-reflection and antifouling properties, making it possible to exhibit both functions at the same time. can. Furthermore, a panel surface switch can also be formed using the transparent conductor portion.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of the CRT panel of Example 1,
FIG. 2 is a partially enlarged schematic diagram of the pattern film, FIG. 3 is a cross-sectional schematic diagram showing the state in which the transparent conductor portion of Example 1 is formed, and FIG. 4 is the pattern film of Example 2. FIG. 5 is a schematic cross-sectional view showing a state in which the transparent dielectric portion of Example 2 is formed, and FIG. 6 is a schematic cross-sectional view of Example 3.
FIG. 7 is a partially enlarged schematic diagram of the transparent conductor portion of FIG. 6, and FIG. 8 is a graph showing the relationship between the surface potential of the panel surface and time. 1...Glass substrate 5...Transparent conductor part 6...
・Transparent dielectric part 7...optical multilayer film 8, 9, 10・
・Pattern film

Claims (1)

[Claims] (1) A CRT panel consisting of a glass substrate and an optical multilayer film formed on the surface of the glass substrate, in which the outermost surface of the optical multilayer film has a linear transmissive property continuous in a stripe or mesh pattern. A CRT panel characterized by having a patterned film consisting of a conductive portion and a transparent dielectric portion formed in a portion where the transparent conductive portion is not formed.