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An electron gun of color picture tube

A technology for a picture tube and an electron gun, which is applied in the field of electron guns, can solve the problems of complex processing technology, difficult quality assurance and high cost, and achieve the effects of improving focusing performance and improving convergence characteristics.

Inactive Publication Date: 2010-02-10
CAIHONG GRP ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the electron gun with this structure has better performance, the processing technology is complicated, the cost is high, and the quality in the processing process is difficult to guarantee.

Method used

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  • An electron gun of color picture tube
  • An electron gun of color picture tube
  • An electron gun of color picture tube

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Referring to accompanying drawing, the electron gun that is applicable to 29 inches of large-screen flat color picture tubes of the present invention consists of G1 electrode 1, G2 electrode 2, G3 electrode 3, G4 electrode 4, G5A electrode 5a, G5B electrode 5b, G6 electrode 6, The glass rod support 7, the cathode 8 and the hot wire 9 are composed. After heating the cathode 8 through the heating wire 9, the cathode 8 emits electrons, and the three beams of electrons pass through the electric field formed by the electrodes G1-G6, focus and converge on the fluorescent screen. The glass rod support 7 fixes the G1-G6 electrodes, the cathode 8 and the hot wire 9 .

[0014] The shape of the G1 electrode hole 11 is changed from a circle to a rectangle, and the G2 electrode hole 12 is a circular hole with a horizontal groove around the circular hole, and the horizontal groove opens to the G1 electrode 1 . The contact surface of cathode 8 and G2 electrode hole 12 remains circula...

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Abstract

The invention discloses an electron gun of a pure flat color picture tube which is applicable to a 29-inch large screen, which is composed of a G1 electrode 1, a G2 electrode 2, a G3 electrode 3, a G4electrode 4, a G5A electrode 5a, a G5B electrode 5b, a G6 electrode 6, a glass bar support 7, a cathode 8 and a hot wire 9. The current is switched on of the hot wire 9 to carry out the heating of the cathode 8, the cathode 8 emits the electrons, and three beams of electrons are focused and converged on a fluorescent screen by an electric field which is formed by G1 to G6 electrodes. The glass bar support 7 fixes the G1 to G6 electrodes, the cathode 8 and the hot wire 9. A quadrupole lens is formed by changing the shapes of electrode holes, so as to improve the focus and convergence performances of the electron gun, reduce the number of parts of the electron gun and lower the cost of the product.

Description

technical field [0001] The invention relates to an electron gun for a color display tube, in particular to an electron gun for a large-screen picture tube, which is suitable for a 29-inch large-screen flat-screen color picture tube. Background technique [0002] Generally, the electron gun used in a 29-inch large-screen picture tube has a high cost due to its complex structure and many parts used. The traditional electron gun used for a 29-inch large-screen picture tube is composed of multiple metal electrodes. After each electrode is applied with a different voltage, an electromagnetic field with a lens effect is formed between the electrodes, which is called an "electronic lens". Each electronic lens is based on The different functions are divided into "pre-focus lens" and "main focus lens". Currently used for 74cm flat (hereinafter referred to as 74cmPF) thick tube neck electron gun (see figure 1 ), consisting of 8 electrodes: G1 electrode, G2 electrode, G3 electrode, G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/48
Inventor 陈延红李刚杨柯颖
Owner CAIHONG GRP ELECTRONICS CO LTD
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