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Colour kinescope

A picture tube and color technology, applied in the field of color picture tubes, can solve problems such as difficult to prevent mis-landing, low luminance, asymmetrical movement, etc.

Inactive Publication Date: 2006-08-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] As a result, even if INVAR material (INVAR is a trademark) with a low expansion rate is used in the shadow mask, it is difficult to prevent mislanding caused by thermal expansion on a scale greater than this, resulting in an edge relative to the Y axis when the entire shadow mask is domed. Phenomenon of asymmetric movement in left and right directions
In addition, due to the occurrence of this mis-landing, the luminance of the display screen with low luminous efficiency of the phosphor is reduced, and the uniformity of white in the display screen is also a problem.
[0013] Although (Japanese Unexamined Patent Publication No. 10-321153) proposes to reduce mislanding by adopting a structure in which the solder joints of the shadow mask and the frame are deviated from the central axis of the shadow mask, the reduction effect is limited to the vicinity of the solder joints, and it is impossible to perform this on the entire surface of the phosphor screen. compensate

Method used

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  • Colour kinescope
  • Colour kinescope
  • Colour kinescope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] figure 2 It is a cross-sectional view of the color picture tube 2 of the first embodiment taken along a vertical plane including the tube axis (Z axis).

[0044] The color picture tube 2 consists of a glass panel 4 that forms a fluorescent screen (not shown) that regularly and correctly coats three-color fluorescent dots on the inner surface, and a funnel portion 6 that forms a part of the vacuum tube container together with the glass panel 4. The electron gun 8 in the neck portion of the funnel 6, the shadow mask 10, and the frame 12 holding the shadow mask 10 are constituted.

[0045] The shadow mask 10 is provided at a position close to the phosphor screen as between the electron gun 10 and the phosphor screen. The shadow mask 10 has a plurality of through holes (not shown) arranged regularly to realize the color selection of the three electron beams emitted from the electron gun 8 . The shadow mask 10 is composed of a spherical (or planar) front portion 9 and a s...

Embodiment 2

[0084] The color picture tube of embodiment 2 except being arranged on the panel pin position of glass panel long side portion, the support spring material embedded in this panel pin and the assembly position (frame) of the horizontal axis (X axis) direction of this support spring The welding position in) is different, and the structure of embodiment 1 is basically the same. Therefore, common parts are assigned the same symbols and descriptions are omitted, and different parts are described.

[0085] Figure 10 It is the upper part of the front view obtained by cutting the color picture tube 52 of the second embodiment in a plane perpendicular to the tube axis and removing the front part of the glass panel 4.

[0086] In the second embodiment, the center of the panel pin 54 is located on the Y axis, which is different from the first embodiment. That is, the positions of the panel pins 54 are the same as those in the conventional color picture tube. What is different from th...

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PUM

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Abstract

A color picture tube includes: a glass panel having a substantially rectangular-frame skirt; a rectangular frame holding a shadow mask; and a support spring elastically supporting the frame inside the skirt and fixed to a first position at inside surface of a long side of the skirt and to a second position at the facing outside surface of the frame. The first and second positions are away in horizontal axis direction perpendicular to tube axis and substantially parallel to the long side. The second position is more away from vertical axis perpendicular to tube axis and horizontal axis than the first position. Materials for the support spring and frame are selected so that, in horizontal axis direction, thermal expansion amount of the support spring between the first and second positions is substantially same as that of the frame between the second position and vertical axis when the tube is operated.

Description

technical field [0001] The present invention relates to a color display tube used in a television or a computer monitor, and more particularly to a fixing portion for fixing a frame holding a shadow mask to a glass panel. Background technique [0002] figure 1 It is a front view showing a state in which a conventional general color picture tube is cut in a plane perpendicular to the tube axis and the front surface of the glass panel is removed. [0003] like figure 1 As shown, the frame 106 of the shadow mask 104 is held by three support springs 108 , 110 , 112 elastically supported inside the skirt 102 , which is substantially rectangular and extends from the front of the glass panel 100 (not shown). Hereinafter, in this specification, an axis perpendicular to the tube axis and substantially parallel to the long side of the skirt portion is defined as the horizontal axis (X axis), and an axis perpendicular to both the tube axis and the horizontal axis is defined as Set t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/07H01J29/02H01J31/20
CPCH01J29/073H01J2229/0711
Inventor 江头英明
Owner PANASONIC CORP
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