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Cathode-ray tube

A cathode ray tube and color technology, applied in the direction of cathode ray tube/electron beam tube, cathode ray/electron beam tube coating, cathode ray/electron beam tube shell/container, etc., can solve the problem of liquid sinking and liquid outflow , uneven coating and other problems

Inactive Publication Date: 2003-09-24
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the area where the deflection yoke is installed, the section of the inner wall is narrowed, so problems such as uneven coating of the graphite coating liquid in the tube inside the neck, liquid outflow, or liquid sinking tend to occur.
[0013] In particular, in the case disclosed in Japanese Utility Model Publication Sho 44-29152/1969, wherein the opening shape of the inner wall of the deflection yoke installation area is formed such that all sides or all sides other than the four sides constituting the outline of the opening are The portion is provided with ridge

Method used

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  • Cathode-ray tube
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Examples

Experimental program
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Example Embodiment

[0021] The embodiments of the present invention are described below with reference to the drawings.

[0022] figure 1 It is a cross-sectional view of the color cathode ray tube of this embodiment taken along the reference line of the deflection system installation area. in figure 1 In this, reference number 20 represents the shape of the outer wall of the deflection system installation area (the contour line of the outer wall of the pyramid in the section perpendicular to the tube axis), and reference number 21 represents the shape of the inner wall (the inner wall of the same pyramid on the same section Contour). The cross-sectional shape of the cathode ray tube of this example is approximately rectangular with respect to its outer wall and inner wall, and the outer wall shape is formed by a shape 20 whose central part slightly protrudes to the outside with respect to the tube axis (in this shape, the four sides constituting the contour line Outer protrusion: This shape is cal...

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PUM

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Abstract

A cathode ray tube, in a direction perpendicular to the tube axis within a range extending 35 mm toward the panel portion side and 20 mm toward the neck portion side from a reference line provided in the deflection yoke mounting area of ​​the cone portion The shape 20 of the wall opening and the shape 21 of the inner wall opening are respectively formed into an approximately rectangular shape and an approximately pincushion shape, and the shape 21 of the inner wall opening of the deflection yoke installation area of ​​the cone portion in the direction perpendicular to the tube axis has a curvature radius Rc at each corner , if the direction toward the tube axis is +, the first straight line 22V and 22H connecting the adjacent bottoms of the corners and the second straight line that is in contact with the center point of the inner wall between the adjacent corner parts and arranged parallel to the first straight line The distance between 23V and 23H is set to a maximum of 2.0mm.

Description

technical field [0001] The present invention relates to a color cathode ray tube, and more particularly to a color cathode ray tube which facilitates reliable internal graphite coating operations and reduces power consumption of the deflection yoke. Background technique [0002] In general, a cathode ray tube used as an image display device is composed of a vacuum envelope, a neck for placing an electron gun, and a funnel portion, wherein the vacuum envelope is formed by connecting the panel portion, and the panel portion is formed by Phosphor powder is coated on the inner surface to form a fluorescent screen, and the cone part presents a cone shape whose diameter gradually decreases from the screen plate part to the neck. [0003] In a color cathode ray tube, a color fluorescent screen coated with various (usually three colors) phosphors is provided on the inner surface of the panel portion, and a shadow mask used as a color selection electrode is arranged adjacent to the f...

Claims

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Application Information

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IPC IPC(8): H01J29/86
CPCH01J29/861H01J2229/8609H01J2229/88
Inventor 能势寿司
Owner HITACHI LTD