Circuit for improving high-pressure line scanning output power of TV set

Abstract

The invention discloses a circuit for increasing the output power of high-voltage horizontal scanning of a cathode ray tube television set. The circuit comprises a horizontal scanning drive signal amplifier, a horizontal driving transformer, a horizontal scanning power amplifier and a horizontal flyback transformer. The horizontal scanning driving signal amplifier is connected in parallel with a RC damping circuit, its collector is connected to the primary coil of the horizontal drive transformer, the two secondary coils of the horizontal drive transformer are respectively connected to the two bases of the horizontal scanning power amplifier, and the horizontal scanning power amplifier is respectively connected to the damping diode and the horizontal reverse stroke The resonant capacitor is connected in parallel, and the horizontal scanning deflection coil and the S correction capacitor are connected in parallel with the horizontal scanning power amplifier after being connected in series, and a collector of the horizontal scanning power amplifier is connected with the primary coil of the horizontal flyback transformer, and the horizontal flyback transformer is composed of initial, The secondary coil is composed of a CR circuit, and the horizontal scanning power amplifier is composed of two high-voltage transistors or field effect transistors connected in series, so that the output power of horizontal scanning can be increased by increasing the working voltage of the horizontal scanning input power.

Description

technical field [0001] The invention relates to an image processing technology of a cathode ray tube (CRT) television, in particular to a circuit for increasing the output power of high-voltage horizontal scanning of the cathode ray tube television. Background technique [0002] CRT TVs appearing on the market are gradually developing towards ultra-thin, large-screen, progressive scanning, high-definition, etc. Therefore, the technical performance of the scanning circuit is also improved accordingly. [0003] For ultra-thin TV sets, due to the shortening of the picture tube, the corresponding scanning deflection angle needs to be increased, so that the line and field scanning deflection power also needs to be increased; [0004] For progressive scan or high-definition televisions, due to the increase in the number of line scan lines, the line scan frequency needs to be increased, and the corresponding line scan deflection power should also be increased. [0005] In order to...

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Problems solved by technology

[0028] The purpose of the present invention is to provide a circuit for improving the output power of high-voltage horizontal scanning of cathode ray tube TV sets, so as to solve the problems encountered in existing ultra-thin, high-definition, progressive scanning TV sets equipped with small inductance deflection coil picture tubes and solutions Difficulty in adjusting line scan linear compensation circuit

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