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Shadow mask for color teletron

A picture tube and tension technology, which is applied in the field of color picture tubes, can solve the problems of severe shadow mask bulging, uneven screen brightness, and low see-through around the shadow mask.

Inactive Publication Date: 2006-04-19
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods are not recommended, because the perspective ratio of the peripheral part of the shadow mask becomes low, and the brightness of the screen is not uniform
In addition, with the above-mentioned shadow mask, when the shadow mask is heated by electron beams, the doming phenomenon of the shadow mask becomes serious.
Also, the doming phenomenon is likely to occur in the peripheral portion of the shadow mask
With this type of tension mask, when using an inexpensive steel frame, the mask including the bridge portion of the mask is stretched horizontally, which creates a wrinkle-shaped color dropout on the screen

Method used

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  • Shadow mask for color teletron
  • Shadow mask for color teletron
  • Shadow mask for color teletron

Examples

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Embodiment Construction

[0028] Figure 4 It is a color picture tube equipped with a shadow mask according to a preferred embodiment of the present invention. As shown in the figure, the color picture tube 60 includes a screen 62 covered with a fluorescent film 61 of a predetermined pattern on the inside, and a tensioned shadow mask 70 installed on the inside of the screen 62. The tensioned shadow mask 70 has been tensioned, so that the three electron beams It can hit the fluorescent layer of the fluorescent film 61 precisely, and also includes a frame 63 supported by the screen 62 to support the tensioned shadow mask 70, so that tension can be applied to the tensioned shadow mask 70. The screen 62 is integrated with a funnel 66 forming a seal, the funnel 66 having a neck 64 in which the electron gun 65 is housed. A deflection yoke 67 for deflecting the electron beam emitted from the electron gun 65 and causing it to strike the phosphor layer precisely is mounted on the neck 64 and the tapered portion...

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PUM

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Abstract

A tension mask for a color picture tube includes a plurality of strips separated a predetermined distance from each other and parallel to each other, and a plurality of real bridges for connecting the neighboring strips and forming slots through which electron beams pass, the number of the real bridges gradually decreasing from the central portion of the tension mask to the peripheral portion thereof.

Description

technical field [0001] The present invention relates to a kind of color display tube, more specifically, relates to a kind of shadow mask installed near the inner fluorescent film of the screen and plays the role of color separation. Background technique [0002] In a typical color picture tube used in a computer monitor or television, an electron gun fires three beams of electrons, which pass through the electron beam passage holes of a shadow mask that acts as a color separation, and then hit the surface of the screen The red, green and blue fluorescent substances on the fluorescent film excite these fluorescent substances to form an image. [0003] In the above-mentioned color picture tube for forming images, the shadow mask that plays a role in color separation is divided into two types, one is a dot-type shadow mask used for computer monitors, and the other is a slot-type (or long-hole) type used for television sets. slit type) shadow mask. Considering the landing poi...

Claims

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Application Information

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IPC IPC(8): H01J29/07H01J29/06
CPCH01J2229/075H01J29/076
Inventor 裵哲汉有元望
Owner SAMSUNG SDI CO LTD