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Colour display tube provided with colour selection electrode

A color picture tube and color selection technology, which is applied in the field of color picture tubes, can solve problems such as shadow mask deformation, image quality deterioration, picture tube color change, etc., and achieve the effect of improving position stability

Inactive Publication Date: 2002-12-04
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These positioning errors cause discoloration of the picture tube, resulting in poor image quality on the color picture tube
[0005] The disadvantage of the existing color picture tube is that when the shadow mask is made of Invar, which is a nickel-iron alloy material, the shadow mask will be deformed during the manufacturing process of the color picture tube

Method used

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  • Colour display tube provided with colour selection electrode
  • Colour display tube provided with colour selection electrode
  • Colour display tube provided with colour selection electrode

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] figure 1 The illustrated color picture tube 1 includes a evacuated glass bulb 2 with a display window 3 and a cone 4 and a neck 5. A screen 6 may be provided on the inner side of the display window 3, and the screen 6 has patterns such as lines or dots that emit fluorescent materials of different colors (for example, red, green and blue). The fluorescent material pattern is excited by three electron beams 7, 8 and 9 generated by the electron gun 10. On the path of the electron beams reaching the screen, the electron beams 7, 8 and 9 are deflected by the deflection unit 11 to ensure that the electron beams 7, 8 and 9 scan the screen 6 systematically.

[0025] The electrons pass through the color selection electrode 12 before hitting the screen 6. The color selection electrode 12 includes a shadow mask 13, which is a truly effective color selection component, which intersects with the electron beam so that the electrons only hit the fluorescent material of the appropriate c...

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PUM

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Abstract

In the manufacturing process of the color picture tube (1), the display window (3) and the cone portion (4) are assembled together through heat treatment in a furnace. Since the color picture tube (1) has an invar shadow mask, the partition (15) is also made of invar, and the corner part (16) is made of iron in order to have sufficient hardness, so the heat treatment causes deformation of the color selection electrode (12). Invar and iron have different coefficients of thermal expansion, causing the solder joints (22) connecting the partition plate (15) and the corner piece (16) to break. In order to overcome this shortcoming, the present invention proposes to provide slots (23) or indentations (24) on the separator (15), so that no stress is generated between the solder joints (22) when the color selection electrode (12) is heated.

Description

Technical field [0001] The present invention relates to a color picture tube (color display tube) having a color selection electrode, the color selection electrode having a frame including a corner part and a partition connected to the corner part. [0002] The present invention also relates to a color selection electrode used in such a color display device and a separator used in the color selection electrode. Background technique [0003] The color picture tube described in the opening paragraph of this article is disclosed in US Patent No. 5,003,218. The color picture tube described in this specification is provided with a color selection electrode with a frame, and the frame is composed of 4 partitions and 4 corner parts, and the corner parts are hung in the corners of the display window. [0004] The color picture tube disclosed in US5003218 is provided with color selection electrodes to ensure that the electron beams from the three electron guns installed in the neck of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J29/07
CPCH01J29/073H01J2229/0722H01J29/02
Inventor T·C·A·亨斯W·M·M·范德斯特恩J·温特斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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