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Cathode ray tube having an improved electron gun

A cathode ray tube and electron gun technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, circuit, etc.

Inactive Publication Date: 2007-07-11
MERIDIAN SOLAR & DISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0049] In such a case, the focused electron beam becomes asymmetrical on both sides, and one side (either left or right) is iris or the image is haloed, thus causing coma with poor resolution

Method used

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  • Cathode ray tube having an improved electron gun
  • Cathode ray tube having an improved electron gun
  • Cathode ray tube having an improved electron gun

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Embodiment Construction

[0077] Referring to the accompanying drawings, the following detailed description will describe a cathode ray tube according to a preferred embodiment of the present invention.

[0078] The cathode ray tube of the present invention comprises: a panel having a fluorescent screen formed on the inner surface, a funnel-shaped device connected to the panel, an electron gun for emitting electrons, a deflection yoke for deflecting in the horizontal and vertical directions electron beam, and a shadow mask with electron beam color selection.

[0079] Preferably, the outer surface of the panel is substantially planar and the inner surface has a prescribed curvature. Also, the funnel-shaped device has a coil mounting portion on which the deflection yoke is mounted, and the shape of the coil mounting portion gradually changes from circular to non-circular in a direction from the neck side to the panel side.

[0080] In this type of cathode ray tube, the electrodes of the coaxial electron...

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Abstract

A cathode ray tube has a low focus degradation, optimum focus characteristic and improved resolution by optimizing a relation between a horizontal inside diameter of a rim portion, which is a common opening portion of main lens forming electrodes for focusing electron beams onto a screen, and a horizontal distance between outside end of one outer electron beam passing hole to outside end of the other outer electron beam passing hole of a correction electrode.

Description

technical field [0001] The present invention relates to cathode ray tubes, and in particular to a cathode ray tube with low focus degradation, optimized focus characteristics and improved resolution by optimizing the horizontal inner diameter at the edge portion and a The relationship between the outer ends of the outer electron beam passing holes to the outer ends of the other outer electron beam passing holes realizes that the edge portion is a common opening portion of the main lens constituting the electrodes for focusing the electron beams onto the screen. Background technique [0002] FIG. 1 illustrates a related art cathode ray tube. [0003] As shown in the figure, a cathode ray tube generally includes: a phosphor screen 1 coated with R, G and B phosphors on the inner surface, a face plate 3 connected to a shadow mask 2 having a color selection function, and a face plate 3 connected to the face plate 3 connected funnels 4 thus together form a vacuum envelope in whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/48H01J31/12H01J29/50
CPCH01J29/503H01J29/48
Inventor 金闰镇李宰豪
Owner MERIDIAN SOLAR & DISPLAY
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