KR100922501B1 - Color CRT - Google Patents

Abstract

The present invention is a flat color cathode ray tube comprising a panel having a screen on the inner surface and a funnel mounted to the rear of the panel; At least one antistatic conductive film and an anti-reflective coating film on the outer surface of the panel, the single layer or multilayer coating film is a material having a maximum absorption peak (Peak) at 480nm ~ 500nm and 600nm ~ 620nm Characterized in that configured.

Therefore, according to the present invention, in the manufacture of a planar cathode ray tube using a clear panel, a conductive film forming composition capable of forming a conductive film on its outer surface to control transmittance and improving contrast characteristics, and a cathode ray tube using the same to provide.

Description

Color cathode ray tube {Color CRT}

1 is a schematic view of a typical flat color cathode ray tube.

2 is a cross-sectional view showing a multilayer coating film of a general flat panel.

Figure 3 is a graph showing the emission spectrum when the panel outer surface according to the prior art is a single layer or multilayer coating film.

Figure 4 is a graph showing the emission spectrum of B, G, R according to the prior art.

5 is a graph showing the emission spectrum of the B, G, R according to the present invention and the absorption spectrum by the conductor coating film.

*** Explanation of symbols for the main parts of the drawing ***

1: Panel 10: Coating film

14: antistatic film 15: antireflective film

16: diffuse reflection

The present invention is to control the transmittance by adjusting the carbon black or titanium black and the pigments of blue, green and red to the coating composition applied to the outer surface of the panel in the color cathode ray tube, the contrast (Contrast) The present invention relates to a flat color cathode ray tube with improved characteristics.

As shown in FIG. 1, a typical flat CRT is coated with fluorescent surfaces 4 of R, G, and B on the inner side, and a panel 1 on which the explosion-proof means is fixed on the front side, and fused to the rear end of the panel. A funnel (2), an electron gun (11) inserted into the neck portion of the funnel to emit an electron beam (6), a deflection yoke (5) for deflecting the electron beam (6), and a constant distance inside the panel A shadow mask (3) having a plurality of holes formed therethrough so as to pass through the electron beam (6), a frame (7) fixedly supporting the shadow mask so as to maintain a constant distance from the inner surface of the panel, and the frame and A spring (8) for connecting and supporting the panel, an inner shield (9) for shielding the cathode ray tube to be less influenced by external geomagnetism, and a reinforcing band (12) installed around the side of the panel to prevent external impact. do.

In addition, there is a magnet 13 for correcting the trajectory of the electron beam 6 so as to strike the predetermined phosphor accurately, thereby preventing poor color purity. In addition, on the outer surface of the panel 1, an outer surface of the panel 1 includes an antistatic film formed of a material having good conductivity and an antireflection film formed of a material having a different refractive index on the outer surface of the panel 1. Apply.

Looking at the operation of the cathode ray tube having the configuration as described above, when a voltage is first supplied to the stem pin, heat is applied to the cathode, electrons are emitted from the cathode to which the heat is applied. The emitted electrons are focused or accelerated by the sixth electrode at the first electrode.

The electron beam 6 formed by the focused or accelerated emitted electrons is deflected by the deflection yoke 5 and evenly scanned throughout the entire panel 1, and the electron beam 6 is provided with a shadow mask provided in front of the panel 1. It passes through 3) and collides with the phosphor 4 coated on the panel 1 to emit light.

In general, the planar cathode ray tube used for the monitor should prevent the electromagnetic waves and minimize the reflection of the external light from the outside of the front part because the user sees the screen at a close distance.

Therefore, conventionally, as shown in FIG. 2, three coating films 10 formed of an antistatic film 14, an antireflection film 15, and a diffuse reflection film 16 are formed on an outer surface of the panel 1.

That is, the antistatic film 14 constitutes an anti-static layer including an electric conductor for preventing electromagnetic waves and antistatic, and the antireflective film 15 for antireflection is It consists of an anti-reflection (hereinafter referred to as AR) layer.

In general, although the AS layer 14 and the AR layer 15 alone have antireflection and electromagnetic wave prevention effects, an antireflection film (Anti-Glare, hereinafter referred to as AG) 16 can be added to increase the antireflection effect.

Therefore, conventionally, a single layer coloring coating film having only an AS function may be composed of one conductive film, a protective film, and a spray film, and in the case of a coloring coating film having an AR function, a multilayer film.

On the other hand, in the outer surface coating of a planar cathode ray tube using clear glass, a single layer or a multilayer film is used a colored coating film for contrast compensation or to obtain a desired transmittance, and pigments are generally used for desired coloring. .

Therefore, in the coating film, ITO, ATO, Au, Ag, PD, or Ru is added to 0.009% to 3.5% of the total content as a single component or a mixture to form a conductive film, and to achieve a transmittance of 60% to 70%. As a pigment, carbon black is used by mixing 0.1% to 30% with respect to the metal ITO, ATO, Au, Ag, Pd, or Ru.

However, as shown in FIG. 3, it can be seen that the conventional cathode ray tube has a very adverse effect on contrast when the coating for coloring is applied.

In other words, graph 1 and graph 2 are graphs of the single-layer conductive film coloring coating of a cathode ray tube for general monitors. In the graph 1, two peaks are formed, but they do not absorb light having a wavelength of 480 nm. In addition, the luminance is disadvantageous by absorbing light in the 550 nm wavelength band.

In addition, when graph 2 does not absorb wavelengths of 470 nm and 700 nm, there is also a disadvantage in contrast.

3 and 4 are graphs of multilayer conductive film coloring coatings of a cathode ray tube for a general cathode ray tube, and a multilayer film coating having an AR function exhibits an ordinary transmittance characteristic curve. It has a more adverse effect.

Accordingly, an object of the present invention is to solve the above-described problems, and the external coating (silicon alkoxide coating film) absorbs a wavelength band gap that avoids the maximum emission wavelength of the phosphor forming the light emitting screen. It provides cathode ray tubes that minimize losses and allow maximum absorption of external light.

In addition, the external coating absorbs the light in the wavelength portion that overlaps each wavelength other than the maximum emission wavelength of the red, green, and blue phosphors to provide a cathode ray tube in contrast. There is a purpose.

The present invention for achieving the above object is a flat color cathode ray tube comprising a panel having a screen on the inner surface and a funnel mounted to the rear of the panel; At least one antistatic conductive film and an anti-reflective coating film on the outer surface of the panel, the single layer or multilayer coating film is a material having a maximum absorption peak (Peak) at 480nm ~ 500nm and 600nm ~ 620nm The single layer or multilayer coating layer is a mixed dopant composed of at least one of ITO, ATO, Au, Ag, Pd, or Ru, and the single layer or multilayer coating layer is carbon black or titanium black ( Titan Black), and the mixed conductor includes one or more of Viridian, Chrome Oxide Green, Cobalt Green, or Terrebel Belt, Green pigment containing 0.01% to 20% of carbon black or titanium black, and at least one of cobalt blue, ultramarine cerulean blue, or manganese blue And a blue pigment containing 0.01% to 25% of carbon black or titanium black, and at least one of vermilion or red iron oxide, and at least one carbon black or titanium black. A color cathode ray tube containing red pigment containing 0.01% to 35% is provided.

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Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.                     

In the present invention, the maximum absorption of the light having a wavelength of 545 nm may be absorbed to improve the contrast of the screen, but in this case, the luminance of the phosphor applied to the inside of the screen shown in FIG. G: 545 nm, B: 450 nm, and R: 625 to 710 nm) avoids absorption and absorbs only the overlapping wavelength bands of green (G), blue (B) and red (R), thereby reducing contrast without losing luminance. To improve.

Accordingly, at least one antistatic conductive film and an antireflective coating film may be formed on the outer surface of the panel, and the single layer or the multilayer coating film may be 480 nm to 500 nm (ⓐ) and 600 nm to 620 as shown in FIG. 4. Characterized by having a maximum absorption peak (Peak) at ㎚ (ⓑ).

By the above configuration, the wavelength overlapped between the wavelength bands of the green (G) and blue (B) phosphors is absorbed at 480 nm to 500 nm (ⓐ), and the portion overlapping the wavelength range of the red phosphor is 600 nm to 620. The contrast was improved by absorbing at nm (ⓑ).

In addition, the single layer or multilayer coating film is a mixed dopant composed of at least one of ITO, ATO, Au, Ag, Pd, or Ru, the single layer or multilayer coating film is carbon black (Tibon Black) or titanium black (Titan Black) ), And is formed so as to contain 0.1% to 35% of the mixed conductor.

First, the outer colored coating film should absorb the external light but not block or absorb the light from the inside, so that the maximum contrast can be realized while showing the maximum brightness. The carbon black or titanium black is used because it must use a blocking or absorbing pigment.

In addition, when comparing Fig. 4 and Fig. 5, Fig. 4 shows the emission spectrum of the red (R), green (G), blue (B) phosphor of the conventional cathode ray tube, preferably shown in Fig. As such, it should be absorbed at the portion ⓐ between the blue (B) phosphor emission peak and the green (G) phosphor emission peak, and absorbed at the portion ⓑ between the red (R) phosphor emission peak. It should be, the first absorption peak (Peak) has an absorption wavelength of 480nm ~ 510nm, the rest is transmitted with a transmittance of 40 ~ 70%.

In addition, the second absorption peak (Peak) has an absorption wavelength of 610nm, the remainder is also transmitted with a transmittance of 40% to 70%.

In addition, a blue pigment and a green (G) pigment are mixed and superimposed to implement the first absorption peak, and a green (G) pigment is applied to the green (G) pigment to implement the second absorption peak. R) The peaks of the pigments should overlap.

Accordingly, as the green (G) pigment, it includes one or more of Viridian, chromium oxide green, cobalt green, or terre belt, and carbon black ) Or 0.01% to 20% of titanium black.

Also, as a blue pigment, at least one of cobalt blue, ultramarine cerulean blue, or manganese blue, and includes carbon black or titanium 0.01% to 25% of black (Titan Black), the red pigment includes at least one or more of Vermilion (Red Iron Oxide), carbon black (Carbon Black) or 0.01% to 35% of titanium black.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the present invention is made by containing carbon black (carbon black) and titanium black (Titan Black) and blue, green, red pigments in a single or multilayer coating film applied to the outer surface of the color cathode ray tube, B), green (G) and red (R) phosphors emit light, which has the effect of further improving contrast characteristics.

Claims (5)

A flat color cathode ray tube comprising a panel having a screen on an inner surface and a funnel mounted to a rear surface of the panel; At least one antistatic conductive film and an anti-reflective coating film on the outer surface of the panel, the single layer or multilayer coating film is a material having a maximum absorption peak (Peak) at 480nm ~ 500nm and 600nm ~ 620nm The single layer or multilayer coating layer is a mixed dopant composed of at least one of ITO, ATO, Au, Ag, Pd, or Ru, and the single layer or multilayer coating layer is carbon black or titanium black ( Titan Black) The mixed conductor, It contains one or more of Viridian, Chrome Oxide Green, Cobalt Green, or Terrebel, and contains 0.01% to 20% of the carbon black or titanium black. With green pigment, A blue pigment containing at least one or more of cobalt blue, ultramarine cerulean blue, or manganese blue, and containing 0.01% to 25% of carbon black or titanium black. Wow, A color cathode ray tube containing at least one of Vermilion or Red Iron Oxide, and containing red pigment containing 0.01% to 35% of the carbon black or titanium black. delete delete delete delete

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