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Circuit for eliminating excessive voltage and current during starting power-on of signal functional module

A function module, signal elimination technology, applied in the field of TV, can solve the problems of abnormal module operation, excessive voltage and current, device damage, etc., to achieve the effect of less material and cost

Active Publication Date: 2017-08-11
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention overcomes the problem that the voltage feedback stabilization circuit in the prior art is likely to cause abnormal operation of the module or damage to the device, and provides a signal elimination function module that eliminates the situation that the power supply voltage and current temporarily exceed the standard when the power supply voltage and current of each independently working function module are turned on. Start the circuit whose voltage and current exceed the standard when it is powered on

Method used

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  • Circuit for eliminating excessive voltage and current during starting power-on of signal functional module
  • Circuit for eliminating excessive voltage and current during starting power-on of signal functional module
  • Circuit for eliminating excessive voltage and current during starting power-on of signal functional module

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Embodiment Construction

[0014] The present invention will be further elaborated below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown in the figure, a circuit that eliminates the voltage and current exceeding the standard when the signal function module starts to power on, it includes a main chip, a switch signal control circuit and a power supply switch drive circuit, and the main chip, switch signal control circuit and power supply switch drive circuit are sequentially electrical connection; the switch signal control circuit is composed of a first resistor R1, a second resistor R2, a first capacitor C1 and a triode Q1, one end of the first resistor R1 is electrically connected to the switch control pin of the main chip, so The other end of the first resistor R1 is electrically connected to one end of the second resistor R2, one end of the first capacitor C1, and the base of the triode Q1 respectively, the other end of the resistor R2 is grounded, and the other end ...

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Abstract

The invention discloses a circuit for eliminating excessive voltage and current during starting power-on of a signal functional module. The circuit is characterized by comprising a main chip, a switching signal control circuit and a power supply switch drive circuit, which are electrically connected in sequence. The circuit realizes gradual improvement of power supply voltage and current for a functional module of a liquid crystal television or a display, solves the problem of excessive voltage and current caused by instantaneous power-on of the functional module, and fulfills the purpose of avoiding abnormal work of the module or device damage caused by power-on starting.

Description

technical field [0001] The invention relates to the technical field of televisions, in particular to a circuit for eliminating excessive voltage and current when a signal function module is powered on. Background technique [0002] At present, the functions of LCD TVs or monitors are becoming more and more complex, and more and more functional modules are used inside, such as wireless communication, 3D processing, TCON processing, MEMC processing, etc.; each of the above modules has power supply voltage and current. Stability requirements, and although the current power supply module has a voltage feedback stabilization circuit, the voltage and current of the above functional modules will still exceed the standard for a short time when the above functional modules are powered on. When the module exceeds the tolerance range, it is very likely to cause the module to work Abnormal or device damage. Contents of the invention [0003] The invention overcomes the problem that t...

Claims

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Application Information

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IPC IPC(8): H04N5/63H04N21/443H03K17/284H03K17/687
CPCH03K17/284H03K17/687H04N5/63H04N21/443
Inventor 李建方连惠
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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