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Cathode ray tube

A technology of cathode ray tube and tube neck, applied in the field of electrode structure of side-heated cathode structure

Inactive Publication Date: 2006-09-13
HITACHI DISPLAYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In addition, in general, heaters of the 3-electron gun type used in cathode ray tubes and the like often use heaters with heater ratings of 6.3V-300mA (per 1 electron gun: 1 heater 0.63W), It cannot be said that sufficient energy saving has been achieved

Method used

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  • Cathode ray tube
  • Cathode ray tube
  • Cathode ray tube

Examples

Experimental program
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Embodiment Construction

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings of examples.

[0030] figure 1 It is a schematic sectional view showing a schematic structure of a shadow mask type color cathode ray tube illustrating an embodiment of the cathode ray tube of the present invention. In this figure, 1 is a panel portion, 2 is a cone portion, 3 is a neck portion, 4 is a phosphor surface formed by coating a phosphor on the inner surface of the panel portion 1, and 5 is a shade as a color selection electrode. Cover, 6 is a magnetic shield that shields the external magnetic field (earth magnetism), 7 is a deflection yoke, 8 is an external magnetic correction device, 9 is an electron gun equipped with a side-heated cathode that emits 3 electron beams, and 10 is representative of 3 electron beams. 1 and carry out the indicated electron beam.

[0031] In such a configuration, the three electron beams 10 emitted from the el...

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PUM

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Abstract

The indirectly heated cathode structure includes a base metal having a thermal electron emitting material layer, a cylindrical sleeve holding the base metal at one end portion thereof and housing a heating heater in the inside thereof, an support having a large-diameter portion and g a small-diameter portion, and a cathode disc having a large-diameter portion at the leg-portion-side of the heating heater and having a small-diameter portion at the heater-main-portion side of the heating heater, wherein an outer surface of another end portion of the sleeve and an inner surface of the small-diameter portion of the support are fixed to each other, and an outer surface of the large-diameter portion of the support and an inner surface of the small-diameter portion of the cathode disc are fixed to each other.

Description

technical field [0001] The present invention relates to a cathode ray tube equipped with an electron gun having a side-heated cathode structure, and particularly relates to an electrode structure of the side-heated cathode structure. Background technique [0002] Cathode ray tubes, which can be used in television picture tubes, display tubes, etc., are widely used as display devices for various information processing devices because of their fine image reproducibility. [0003] This kind of cathode ray tube is constituted by having a vacuum envelope, and the vacuum envelope is composed of the following: a panel part, which forms a fluorescent surface formed by coating a phosphor on the inner surface; , the control electrode, the electron beam generating part composed of the accelerating electrode, the electron beam generated by the electron beam is focused and accelerated, and it is emitted to the fluorescent surface. The electron gun has multiple electrodes; and the cone pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/04H01J29/48H01J1/20
CPCH01J1/20H01J29/04
Inventor 铃木行男小泉幸生小宫寿文
Owner HITACHI DISPLAYS