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Colour displaying tube

A color picture tube, in-line technology, applied in the field of color picture tube, can solve the problems of deflection power and geometric distortion increase, electron beam defocus, length shortening, etc., and achieve high display quality, good display effect, thin thickness effect

Inactive Publication Date: 2006-05-24
CAIHONG GRP ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the deflection angle is further increased, the electron beam will be seriously defocused during scanning, and the sharpness of the edge of the image will be greatly reduced when the spot size becomes larger, and the deflection power and geometric distortion will increase. Although some technical countermeasures have been taken, its Image quality, such as color purity, brightness uniformity, white field uniformity and distortion, etc. are still inferior to traditional picture tubes, so it will face great technical difficulties to further increase the deflection angle and shorten the overall length
Furthermore, the structure of the traditional picture tube limits its length to be further shortened

Method used

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Embodiment Construction

[0019] refer to figure 1 As shown, the present invention includes a fluorescent screen 1 and a cone 2 configured therewith. A shadow mask 7 and a frame assembly 6 are installed inside the fluorescent screen 1, and an internal magnetic shield 8 is also connected to the frame assembly 6. A deflection yoke 5 is installed outside, and the cross section of the deflection yoke 5 is elliptical or rectangular. Two electron gun groups 3, 4 are horizontally arranged in the tail end of the cone, and the angle between the two electron gun groups 3, 4 is 50°. °~60°.

[0020] The subguns of electron gun groups 3 and 4 are placed horizontally or vertically, that is, the three subguns R, G, and B of each electron gun group are distributed horizontally or vertically.

[0021] refer to figure 2 As shown, the section of the deflection yoke 5 is oval or rectangular.

[0022] Referring to Fig. 3 (a) (b), taking a 76cm (32″) ultra-thin color picture tube as an example, the inclination angle of ...

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Abstract

The color-television tube includes fluorescent screen and matched cone. Shadow mask and frame subassembly are installed inside fluorescent screen. The frame subassembly is connected to inner magnetic shade. Deflection coil is installed outside the cone. Section of the deflection coil is ellipse or rectangle. Two sets of electron gun are setup inside tail end of cone horizontally. Included angle between two sets of electron gun is about 50 ¿C 60 degrees. R, G, B three sub guns of each set of electron gun are arranged in horizontally or vertically. When sub guns are arranged in horizontally, phosphor strips in three colors are arranged vertically. When sub guns are arranged in vertically, phosphor strips in three colors are arranged horizontally. Two sets of electron gun are adopted in the invention so as to make maximum deflection range of electron beam reach to 150 ¿C 160 degrees. Comparing with prior art, the invention provides shorter color-television tube and better display effect.

Description

technical field [0001] The invention relates to a color picture tube, in particular to a color picture tube used in color television image display. Background technique [0002] As a display device, the color picture tube has very mature technology and manufacturing process. The displayed image quality is the best among various display devices so far, and the cost performance is the most advantageous. Therefore, it has been widely used in many fields. The biggest defect of this product is that length is long at present, and volume is big, and will occupy larger space. In recent years, flat-panel display devices such as liquid crystal display and plasma have made great achievements. Their strong market promotion and cost reduction trend have posed severe challenges to color picture tubes, making their defects more prominent. Therefore, thinning will be the key to the life cycle of color picture tubes. Continuation of key technologies. One of the effective ways to shorten th...

Claims

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Application Information

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IPC IPC(8): H01J29/70H01J29/06H01J29/18H01J29/50H01J31/20
Inventor 张渭川
Owner CAIHONG GRP ELECTRONICS CO LTD