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Color cathode ray tube

A cathode ray tube, color technology, applied in the direction of cathode ray tube/electron beam tube, cathode ray/electron beam tube shell/container, discharge tube, etc., can solve the weakening of curved surface strength, expensive cathode ray tube, destroying color Cathode ray tube, etc.

Inactive Publication Date: 2006-03-01
LG PHILIPS DISPLAY KOREA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] On the other hand, even if a shadow mask made of INVAR material is used to suppress doming, the strength of the curved surface of the shadow mask 5 is weakened due to the flatness of the shadow mask.
Color cathode ray tubes are easily damaged due to external impact
So it is not surprising that CRTs including shadow masks made of expensive INVAR materials are very expensive

Method used

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  • Color cathode ray tube
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Examples

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Embodiment Construction

[0040] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0041] image 3 is a front view of a shadow mask according to an embodiment of the present invention. Such as image 3As shown, the front surface of the shadow mask 15 has a plurality of oblong holes 151 . These holes 151 may be formed using chemical etching. A plurality of holes 151 are arranged at intervals of a predetermined distance from each other in horizontal and vertical directions. The vertically adjacent holes 151 are connected to each other by the connecting portion B. As shown in FIG. The hole 151 is a passage through which electron beams pass, and extends in the vertical direction.

[0042] Such as image 3 As shown, in the structure of the shadow mask 15 according to the present invention, the size and shape of the holes through which the electron beams pass satisfy the following relationship:

[0043] ...

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Abstract

The present invention provides A color cathode ray tube comprising: a panel having a flat outer surface and an inner surface that has a predetermined curvature; and a shadow mask, wherein B2 / P2<=B3 / P3 where B1 is a length of a bridge as a distance between holes in a vertical direction at a center portion of the shadow mask; B2 is a length of a bridge as a distance between holes in a vertical direction at four corner portions of the shadow mask; B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof; P1 is a vertical pitch of the holes at the center portion of the shadow mask; P2 is a vertical pitch of the holes at the four corner portions of the shadow mask; and P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.

Description

[0001] This application is a divisional application of the patent application filed on March 28, 2003 with the application number 03108408.7 and the title of invention being "color cathode ray tube". technical field [0002] The present invention relates to a color cathode ray tube, in particular to a shadow mask made of aluminum killed steel (AK) for a color cathode ray tube, which can improve the brightness and brightness uniformity of the corner, reduce the doming effect and increase the curvature The surface maintains strength and reduces product cost. Background technique [0003] Generally speaking, a cathode ray tube is a display device that converts electrical signals into electron beams and scans the fluorescent screen with the electron beams to generate visible light to display images. Because the performance-price ratio of the cathode ray tube is very good, it has been widely used. [0004] Figure 1 schematically shows the structure of an ordinary color cathode r...

Claims

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Application Information

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IPC IPC(8): H01J29/07H01J29/86
CPCH01J29/07H01J2229/075H01J2229/0794
Inventor 朴镇兑裴济允
Owner LG PHILIPS DISPLAY KOREA CO LTD
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