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Method for manufacturing colour cathode-ray tube fluorescent screen

A technology of cathode ray tube and manufacturing method, which is applied in cold cathode manufacturing, cathode ray tube/electron beam tube, tube/lamp screen manufacturing, etc., can solve the problem that the white brightness does not meet the practical level, the luminous color brightness of phosphors declines, etc. question

Inactive Publication Date: 2003-07-02
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such residues of pigments in one hue lead to a decrease in the brightness of the emitted phosphor color of the other two shades, and in this case, white brightness may drop below a level that is not practical

Method used

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  • Method for manufacturing colour cathode-ray tube fluorescent screen
  • Method for manufacturing colour cathode-ray tube fluorescent screen
  • Method for manufacturing colour cathode-ray tube fluorescent screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Embodiments of the present invention will be described below with reference to the drawings.

[0019] figure 1 (A), (B), and (C) represent the spectral transmittances of the pigments for blue, green, and red optical filters. Line A represents the relationship between wavelength and transmittance of pigments of various colors, and line B represents the characteristic curves of phosphors of various colors. From these graphs, it can be seen that the difference between the peak transmittance of the green pigment and the transmittance at the emission peak wavelengths (near 450nm and around 630nm) of the blue and red phosphors is the same as the difference between the peak transmittance of the blue pigment and the green and red phosphors. The difference between the transmittance of the emission peak wavelength (near 550nm, near 630nm) of the red phosphor, and the transmittance between the peak transmittance of the red pigment and the emission peak wavelength (near 450nm, nea...

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PUM

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Abstract

In manufacturing a phosphor screen of a color picture tube, a cured resist layer used in a photolithography process for a black matrix pattern may remain on a hole portion of the black matrix pattern formed on the inner surface of a glass panel without being removed completely in the washing process. In such a case, the pigment of a first optical filter layer remains adhered to the surface of the remained resist layer. This adhered pigment degrades substantially the brightness of luminescent colors of the other two phosphors. Therefore, among the three color optical filter layers, the green optical filter layer, which has the minimum difference between a peak transmittance and a transmittance in other wavelength regions, is formed first. Accordingly, a level of an adverse effect of the remained green pigment on the emission of the blue and red phosphors can be suppressed to minimum.

Description

technical field [0001] The invention relates to a manufacturing method of a color cathode ray tube fluorescent screen with an optical filter film fluorescent screen. Background technique [0002] At present, most color cathode ray tubes have an optical filter film layer between the glass panel and the phosphor layer for the purpose of improving the brightness and contrast of the fluorescent screen. This kind of fluorescent screen with optical filter film is formed on the inner surface of the glass panel that has been treated with black matrix or black stripes. The dot-shaped or strip-shaped optical filter film layer that only transmits red, green, and blue wavelengths respectively, It is composed of phosphor layers emitting red, green and blue light formed on the optical filter film layer. [0003] Using photolithography technology, the red, blue and green color filter films are sequentially formed on the inner surface of the glass panel forming the black matrix pattern, th...

Claims

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Application Information

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IPC IPC(8): H01J9/22H01J9/227
CPCH01J9/227H01J29/32H01J2329/326
Inventor 小池教雄田中肇
Owner KK TOSHIBA