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Colour CRT shadow-mask support

A technology of cathode ray tube and support frame, which is applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrical components, etc., can solve the problems of increasing the weight of the shadow mask support frame and reducing the vibration characteristics, etc.

Inactive Publication Date: 2003-12-24
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weight of the shadow mask support frame 5 increases, thereby reducing the characteristic vibration characteristics

Method used

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  • Colour CRT shadow-mask support
  • Colour CRT shadow-mask support
  • Colour CRT shadow-mask support

Examples

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Embodiment Construction

[0043] Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings.

[0044] A shadow mask support frame for a color CRT of the present invention will be described with reference to FIGS. 5 to 8. FIG.

[0045] The shadow mask supporting frame 7 of the present invention includes: two main frames 71 with equilateral triangle cavity parts and two sub-frames 72 with square solid parts. The main frames 71 are arranged in parallel and have ribs 711, on which the shadow masks 4 extending along the vertical sides of the equilateral triangle will be mounted. The sub-frame 72 includes: end portions 721 respectively fixed to respective end portions of the main frame 71; support portions 722 internally extending a predetermined length at an obtuse angle with the end portions 721; and internally at an obtuse angle with the support portions 722. The central portion 723 is extended by a predetermined leng...

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PUM

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Abstract

A shadow mask support frame for a color CRT is disclosed, in which a coupling portion between a main frame and a sub frame, and a shape of the sub frame are improved to increase the frequency of unique oscillation, thereby reducing a howling phenomenon occurring in a shadow mask. The shadow mask support frame for a color CRT includes: two main frames having hollow sections; two sub frames having solid sections, end portions respectively fixed into respective end portions of the main frames, a support portion inwardly extended with a predetermined length at an obtuse angle to the end portions, and a central portion inwardly extended with a predetermined length at an obtuse angle to the support portion; and a bracket mounted between respective end portions of the main frames and the sub frames, for reinforcing fixing portions of the main frames and the sub frames.

Description

technical field [0001] The invention relates to a shadow mask support frame of a color cathode ray tube (CRT), in particular to a shadow mask support frame supported by tension. Background technique [0002] Usually, a shadow mask supporting frame of a color CRT supports the shadow mask, thereby preventing the shadow mask from vibrating due to external impact or sound waves, and the shadow mask plays a role of selectively passing electron beams. The shadow mask supporting frame also supports the shadow mask to maintain a predetermined interval from the phosphor screen so that electron beams passing through electron beam passage holes of the shadow mask land on predetermined phosphors. [0003] figure 1 Is a partially exploded side view of a prior art color CRT incorporating a shadow mask support frame. refer to figure 1 , the color CRT of this prior art comprises: flat board 1, on this flat board 1, be coated with dot-type fluorescent screen 2 of R, G, B color; Have the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/02H01J29/07
CPCH01J29/073H01J29/02
Inventor 金相基
Owner LG ELECTRONICS INC
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