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Shadow mask of color cathode-ray tube

A cathode ray tube, color technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrical components, etc.

Inactive Publication Date: 2005-11-30
LG PHILIPS DISPLAY KOREA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these existing structures for shadow masks have limitations in reducing springback and cannot sufficiently prevent the reduction in strength of the shadow mask.

Method used

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  • Shadow mask of color cathode-ray tube
  • Shadow mask of color cathode-ray tube
  • Shadow mask of color cathode-ray tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

[0046] In the preferred embodiment of the present invention, the front sectional view of the shadow mask of the present invention is similar to the front sectional view of the existing shadow mask shown in FIG. 2 because only the slits in the skirt 130 are modified.

[0047] Figure 4 is a side cross-sectional view of the long side and the short side of the shadow mask of the preferred embodiment of the present invention.

[0048] Such as Figure 4 As shown, a shadow mask according to a preferred embodiment of the present invention will be described below.

[0049] exist Figure 4 In the side sectional view, a longer section with a specified thickness and a slightly curved surface indicates the shape of the shadow mask surface. One of a plurality of protrusions 410 recessed into the center of the shadow mask skirt (130 in FIG. 2) in an arcuate s...

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PUM

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Abstract

Disclosed herein is a shadow mask for a color cathode ray tube, and more particularly to a shadow mask for a color cathode ray tube having a modified shape and arrangement of slit and embossments of a skirt portion of the shadow mask. The present invention provides a color cathode ray tube including a generally rectangular shadow mask having a curved apertured portion having a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with said apertured portion and a skirt portion being bent back from a periphery of said curved imperforate portion; said skirt portion being provided with a plurality of tilted slits and a plurality of embossments. In addition, the present invention provides a color cathode ray tube including a generally rectangular shadow mask having a curved apertured portion having a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with said apertured portion and a skirt portion being bent back from a periphery of said curved imperforate portion; said skirt portion being provided with a plurality of tilted slits with bridge and a plurality of embossments.

Description

technical field [0001] The present invention relates to a shadow mask for a color cathode ray tube, and more particularly, to a shadow mask for a color cathode ray tube having an improved shape and arrangement of slits and protrusions on the skirt of the shadow mask. Background technique [0002] As the main component for realizing images in image display devices such as television receivers or computer monitors, a color cathode ray tube (CRT) is a device that realizes color images by bombarding the inside of a fluorescent screen with an electron beam controlled by an image signal. Fluorescent substances containing R, G, and B coated on the inner side of the panel as the front part of the CRT emit light to realize color images. [0003] Fig. 1 is a partial sectional view showing the structure of a conventional color cathode ray tube. [0004] As shown in FIG. 1 , a color cathode ray tube generally includes: a panel 1 having a roughly rectangular shape at the front of the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/07
CPCH01J2229/0772H01J29/07
Inventor 姜秀东
Owner LG PHILIPS DISPLAY KOREA CO LTD