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Device for demagnetizing clor TV set through automatic switchover and preventing overcurrent impulsion when turning on TV set

A color TV and startup technology, applied in the field of TV, to achieve the effect of improving product performance, improving reliability, and reducing costs

Inactive Publication Date: 2004-10-27
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Achieving the beneficial effect of energy saving

Method used

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  • Device for demagnetizing clor TV set through automatic switchover and preventing overcurrent impulsion when turning on TV set
  • Device for demagnetizing clor TV set through automatic switchover and preventing overcurrent impulsion when turning on TV set
  • Device for demagnetizing clor TV set through automatic switchover and preventing overcurrent impulsion when turning on TV set

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Embodiment Construction

[0007] The best way to realize this innovation will be described in detail below in conjunction with the accompanying drawings, and the previous description will not be repeated. The pure self-inductance choke coils L1 and L2 without (power frequency) mutual inductance are connected in series on the incoming line of the color TV grid, which can replace the current limiting resistor R20 to reduce the impact of overcurrent when starting up, and can also suppress the symmetry of bidirectional transmission along the power line. Interference and asymmetrical interference and harmonic interference effects, in order to alleviate the impact of overcurrent when starting up, improve the reliability of the color TV's direct rectification capacitor filter and normal degaussing resistor from the power grid, and add high-efficiency and energy-saving performance. For this reason: this innovation adds single-pole double-throw position switch relay KB and related circuits. (Example in Figure 1...

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Abstract

Single-pole double-throw switch relay is utilized to put auto degaussing loop and current limiting circuit though when reset is executed at time of starting up or power breakdown. After operation, the device sets up shorting current limiting resistor and cuts off degaussing loop. Advantages of the invention are: reducing power consumption at stand by raising reliability etc. ratio between performance.

Description

Technical field [0001] The invention mainly relates to the field of television technology. Background technique [0002] In the existing technology, if the standby power consumption of a color TV is less than 3W, the scheme of separating the standby power supply from the main power supply was adopted in the past, so the cost is expensive. Now it is common to use a normal working switch regulated power supply and a standby power supply function scheme, which can reduce costs. However, in the prior art color TV switching power supply and standby power supply function, the standby power consumption of the whole machine is relatively large, generally greater than 5W. The reason for the large standby power consumption of color TV sets is that color TV sets are equipped with automatic degaussing circuits. Among them, although the three-terminal degaussing resistor has a better degaussing effect than the two-terminal degaussing resistor. But when the power grid is higher than 23...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/63
Inventor 戴俊
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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