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Color cathode ray tube

A cathode ray tube and shadow mask 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 problem of poor mechanical processability and deterioration of drop characteristics , reduce the increase in manufacturing costs and other issues

Inactive Publication Date: 2005-02-09
LG PHILIPS DISPLAY KOREA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the cost is high and the machinability is poor, so an annealing temperature higher than 900° C. is required, and the metal mold must be heated when forming the shadow mask.
[0013] Also, compared with the shadow mask of AK material (AK shadow mask), the Invar shadow mask has low structural strength, and makes the drop characteristics deteriorate so that the wedge ratio of the panel (thickness of the corner of the panel to the middle thickness ratio) is set to 220% or more than 220%, and the shadow mask curvature is set to be similar to a spherical shape, that is: similar to a single curvature radius R in the conventional technique
Therefore, it is not possible to achieve an optimum curvature of the panels that are light, reduce manufacturing costs and increase structural strength

Method used

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

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Embodiment Construction

[0028] Following the examples illustrated in the drawings, preferred embodiments of the present invention will now be described in detail.

[0029] Hereinafter, a color cathode ray tube according to the present invention will be explained in more detail.

[0030] figure 2 is a longitudinal sectional view illustrating a color cathode ray tube according to the present invention, and image 3 is a perspective view illustrating an effective surface of a panel in a color cathode ray tube according to the present invention.

[0031] as in figure 2 with 3 As shown in , in the color cathode ray tube of the present invention, in forming the inner curvature of the panel, the curvature of the panel increases from the central portion of the panel 10 toward the peripheral portion of the effective surface.

[0032] In the case where the inner curvature of the panel is increased from the middle portion of the panel 10 toward the peripheral portion of the active surface (hereinafter ref...

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Abstract

A color cathode ray tube is provided in which an inner radius of curvature is designed as 0.3<=(Rxe / Rxc)<=0.5, to obtain a structural intensity of a panel mask corresponding to the inner curvature of the cathode ray tube panel to decrease partial doming and increase a drop characteristic.

Description

technical field [0001] The present invention relates to a color cathode ray tube, and more particularly to a color cathode ray tube capable of obtaining structural strength corresponding to a shadow mask of a panel, reducing local protrusions, and enhancing drop characteristics by setting the curvature of the panel This is realized by gradually increasing the size from the middle part of the panel to the peripheral part. Background technique [0002] Generally, color cathode ray tubes are used to display images, and are classified into curved type cathode ray tubes and flat type cathode ray tubes according to the shape of the panel. [0003] Curved surface type cathode ray tubes have several problems, such as image distortion, eye fatigue due to reflection of light, etc., and therefore, demand is reduced, while flat type cathode ray tubes have the ability to realize image without distortion, reflection of outside light The advantages of being minimized and maximizing the vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J29/02H01J29/07H01J29/86H01J31/00
CPCH01J29/861H01J2229/862H01J29/02
Inventor 金秉哲
Owner LG PHILIPS DISPLAY KOREA CO LTD