Degaussing circuit and television

Abstract

The present invention is suitable for the field of television, and provides a degaussing circuit and a television. The degaussing circuit comprises the following components: a degaussing time adjusting module, a voltage regulating filtering module, a voltage adjusting module, a switching tube, a relay, a degaussing resistor and a degaussing coil. The relay comprises a first coil and a first switch. The input end of degaussing time adjusting module is connected with a standby voltage. The output end is connected with the control end of switching tube. The control end of switching tube is respectively connected with the voltage adjusting module and the voltage regulating filtering module. The output end of switching tube is connected with a first coil. One end of the first switch is connected with an alternating current power through the degaussing resistor. The other end of the first switch is connected with the alternating current power through the degaussing coil. When the first switch is closed, the degaussing resistor, the degaussing coil and the alternating current power form a degaussing loop. The degaussing circuit provided by the invention adopts the voltage adjusting module so that the switching tube does not conduct when the switching tube is opened after standby. The magnetizing phenomenon which is generated in television opening after standby is settled.

Description

technical field [0001] The invention belongs to the field of television sets, in particular to a degaussing circuit and a television set. Background technique [0002] Televisions have brought new audio-visual enjoyment to people's lives, but the shadow mask of color TV cathode ray tubes (CathodeRay Tube, CRT) is easily magnetized by external strong magnetic fields, which will affect the color purity and convergence performance of color TVs, resulting in annoying The color spots on the screen will affect the audio-visual effect. [0003] The existing traditional degaussing circuit is composed of a degaussing coil set on the explosion-proof belt of the CRT in series with a direct-heating step-type positive temperature coefficient (Positive Temperative Coefficient, PTC) degaussing thermistor. The initial current of -p eliminates the residual magnetism on the iron parts around the CRT; in order to prolong the service life of the degaussing resistor, the degaussing circuit of t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a degaussing circuit, aiming to solve the problem that the relay switching circuit is disturbed or the performance of the switching components deteriorates, which will cause the magnetic phenomenon on the TV when the existing degaussing circuit is turned on after standby

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