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Color cathode-ray tube

A cathode ray tube and color technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrical components, etc., can solve problems such as small curvature, reduced support strength of curved surface, and deterioration of color purity

Inactive Publication Date: 2002-07-24
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires a shadow mask for a color cathode ray tube having a panel whose active area is flat to have a smaller curvature, thus resulting in a reduced supporting strength of the curved surface of the active area of ​​the shadow mask
In general, when a shadow mask for a color cathode ray tube is subjected to an impact of a predetermined intensity or more, it is locally deformed, resulting in deterioration of color purity

Method used

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  • Color cathode-ray tube
  • Color cathode-ray tube
  • Color cathode-ray tube

Examples

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Embodiment Construction

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to examples shown in the accompanying drawings.

[0026] image 3 shows the structure of the shadow mask according to the present invention. The shadow mask has an effective area 100 in which a plurality of through holes through which electron beams pass are formed, and a non-active area 200 surrounding the active area. In the non-active area 200, two half-etched lines according to the present invention are arranged in a rectangle surrounding the active area 100. The radius of curvature R of the half-etched line is preferably 0.8-3 mm at the corners of the shadow mask. When the radius of curvature is too large, the effective area may be deformed at the time of shadow mask molding. On the other hand, when the radius of curvature of the rectangular half-etched line is too small, the preparation of the half-etched line according to the etching process is difficult to c...

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Abstract

There is provided a color cathode-ray tube comprising a panel having a fluorescent plane formed on the inner face thereof, and a shadow mask arranged at the inner side of the panel having a predetermined distance therefrom, in which the shadow mask has an effective area in which electron beam passage holes are formed and a non- effective area surrounding the effective area, and at least one half etching line is formed at the non-effective portion of the shadow mask. Accordingly, shocks due to vibration of the cathode-ray tube are absorbed not to transmit to the shadow mask, improving the curved surface supporting strength of the shadow mask.

Description

technical field [0001] The present invention relates to a color cathode ray tube, and more particularly to a color cathode ray tube in which a semi-etched line is formed around an effective area of ​​a shadow mask in order to increase the support strength of the curved surface of the shadow mask so that the shadow mask can withstand impact. Background technique [0002] Refer below figure 1 A conventional color cathode ray tube is explained. A conventional color cathode ray tube is constructed by combining a front glass called a panel 1 and a rear glass called a funnel 2 with each other using fritted glass. The cathode ray tube includes: a phosphor surface 4 that emits light formed on the inner surface of a panel; an electron gun 14 serving as a source of electron beams 6 that cause the phosphor surface 4 to emit light; a shadow mask for selecting colors to allow predetermined phosphors to emit light 3; and the frame 7 supporting the shadow mask 3. The spring 8 that combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J29/07
CPCH01J2229/0772H01J29/07
Inventor 赵显植
Owner LG ELECTRONICS INC