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Large screen glass cone for colour cathode ray tube

A cathode ray, wide-screen technology, applied in the direction of cathode ray/electron beam tube shell/container, glass forming, glass manufacturing equipment, etc., can solve the problem of long diagonal axis, reduce leakage, reduce magnetic field leakage Effect

Inactive Publication Date: 2011-02-16
HENAN ANCAI HI-TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the funnel meeting this condition reduces the deflection power of the deflection yoke and reduces the magnetic field leakage to a certain extent, the length of the rectangular cross section of the deflection yoke part (yoke part) satisfying the condition of 0.6<ΔHV / L<0.71 Axis H, short axis V and diagonal axis L approximately satisfy the Pythagorean theorem in mathematics, which will inevitably cause the length of the diagonal axis to be too long

Method used

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  • Large screen glass cone for colour cathode ray tube
  • Large screen glass cone for colour cathode ray tube
  • Large screen glass cone for colour cathode ray tube

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Experimental program
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Embodiment Construction

[0027] In the wide-screen funnel for cathode ray tubes of the present invention, when the aspect ratio of the screen (the ratio of the length of the major axis to the length of the minor axis) is 1.6 to 2, the structure of the deflection yoke part is further optimized to make the funnel for cathode ray tubes The wide-screen funnel can reduce the deflection power of the deflection yoke and minimize the leakage of the magnetic field lines, especially the magnetic field leakage in the direction of the diagonal axis, while meeting the requirements of high brightness and high frequency.

[0028] A preferred embodiment of the wide-screen funnel for a cathode ray tube of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] refer to Figure 2 to Figure 5 As shown, the wide-screen funnel 20 for a cathode ray tube of the present invention includes a neck 7 , a funnel 8 and a rectangular deflection yoke portion 21 . Wherein, the i...

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Abstract

The invention discloses a wide-screen glass cone for color cathode ray tube (CRT), comprising a cone and a tube neck, characterized in that the cone and tube neck are interconnected through rectangular deflecting coil, where the inner and outer sides of cross section of the rectangular deflecting coil meet the relational expressions (L+S) / D>=1.4 and (1.6=<L / S<=2), in which, L, S and D stand for long-axis length, short-axis length and diagonal length of inner or outer surface of cross section of the rectangular deflecting coil, respectively. The invention also discloses a CRT and glass cone producing mould.

Description

technical field [0001] The invention relates to a cathode ray tube technology, in particular to a cathode ray tube, its wide-screen funnel, and a mold for producing the funnel. Background technique [0002] refer to figure 1 As shown, the existing color cathode ray tube includes a glass screen 1 and a funnel 2 packaged together with the glass screen 1, and the inside of the entire sealed cathode ray tube is evacuated into a vacuum state. The inner surface of the glass screen 1 is coated with fluorescent materials in red, green and blue colors. The funnel 2 includes a funnel 8 , a deflection yoke part 3 and a tube neck 7 , and the funnel 8 and the tube neck 7 are connected through the deflection yoke part 3 . A shadow mask, a frame, and an inner shielding plate are arranged inside the funnel 2, an electron gun is arranged on the neck 7, and a deflection yoke is arranged outside the deflection coil part 3. The above-mentioned structure plus the glass screen 1 and the funnel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/86H01J9/24C03B23/217
Inventor 任清海邵玉杰
Owner HENAN ANCAI HI-TECH