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TV set high-voltage stabilizing method and corresponding system

A stabilizing method and a stabilizing system technology, which is applied in the direction of TV system scanning details, TV, electrical components, etc., can solve the problem of unstable output voltage of high-voltage packs, and achieve the effect of eliminating deformation and stabilizing anode high voltage

Inactive Publication Date: 2007-01-10
KONKA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a TV high voltage stabilization method and a corresponding system to solve the problem of unstable output voltage of the existing TV high voltage package

Method used

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  • TV set high-voltage stabilizing method and corresponding system
  • TV set high-voltage stabilizing method and corresponding system
  • TV set high-voltage stabilizing method and corresponding system

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Embodiment Construction

[0027] Such as figure 2 Shown is the schematic circuit diagram of the TV high voltage stabilization system of the present invention. The high voltage stabilization function is mainly composed of a compensation power transformer T2, a switch tube V3, and an output voltage regulator tube V2.

[0028] figure 2 The middle V3 is a switching tube, which forms a switching power supply with the compensation power transformer T2, that is, the compensation switching power supply, which has a compensation effect on the high voltage output of the high voltage package. The secondary of the compensation switching power supply transformer T2 is equivalent to the output of the compensation switching power supply. The compensation switching power supply adopts a forward type, that is, when the switching tube V3 is turned on, the secondary of the compensation transformer T2 has an output, and its output voltage range is mainly determined by The voltage at both ends of the energy storage capa...

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Abstract

The method includes following steps: (1) detecting change of anode current of display tube; (2) when anode current increases, the method inputs an offset voltage, and superposes the offset voltage to a voltage generated by horizontal flyback output transformer in high voltage of TV set in order to balance out generated voltage drop caused by increment of anode current. The invention also discloses system corresponding to the method. The invention makes high voltage of anode output from display tube stable relatively so as to eliminate distortion of image output from TV set.

Description

technical field [0001] The invention relates to the field of picture tube televisions, in particular to a television high-voltage stabilization method and a corresponding system. Background technique [0002] Existing CRT (picture tube) television broadcasts TV programs, especially when playing still images, the image picture will usually become larger in the place where the image is particularly bright on the screen, and the image picture will become smaller in the darker place of the image; particularly serious , when there are two pictures with large brightness changes before and after in the TV program, the TV image will shake. This is caused by the unstable output high voltage of the high-voltage package (line flyback high-voltage output transformer) in the TV. When the output current increases, the output voltage drops, causing serious image distortion. [0003] In current CRT TV sets, the anode high voltage (25KV~30KV) of the picture tube is all provided by the line ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N3/185
Inventor 陶显芳
Owner KONKA GROUP