Method, device, circuit and liquid crystal television for realizing standby of a display device

Abstract

The embodiment of the invention provides a display device standby realizing circuit, method and device and a liquid crystal television. The problem that a display device is not able to start a standby state is solved, wherein the problem is caused due to the fact that when the existing display device receives a standby signal and if powering an external load is still carried out, a circuit which powers the external load in a main circuit of a power supply board of the display device does not switch off, and after the external load no longer needs power supply, the part of circuit cannot switch off. The circuit comprises a voltage output circuit which is used for outputting a voltage signal to a first comparison circuit according to current output by a first power supply, and the first comparison circuit which is used for comparing voltage received from the voltage output circuit with first preset voltage set by a setting circuit, instructing a motherboard to switch off the first power supply, and instructing the motherboard to use a second power supply to carry out power supply when the voltage received from the voltage output circuit is less than the first preset voltage, so that the display device is standby.

Description

technical field [0001] The invention relates to the technical field of display devices, in particular to a method, device, circuit and liquid crystal television for realizing standby of a display device. Background technique [0002] For all LCD TVs, the standby function must be implemented. The domestic standard requires that the standby power of the LCD TV is less than 0.5W under the mains test. The current solution is to add a standby MCU separately on the main control board. When the standby MCU When the remote control standby light signal is detected, a control signal is sent to turn off the output of the main board and the output of the main circuit of the power board to realize the standby power requirement. [0003] The main circuit of the power supply board of the LCD TV provides two outputs, one output supplies power to the LED light bar in the LCD TV under normal working conditions, and the other output supplies power to the motherboard and speakers of the LCD TV ...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a circuit, method, device, and LCD TV for realizing standby of a display device, so as to solve the problem of power supply of the display device if the existing display device is still supplying power to an external load when receiving a standby signal. The circuit that supplies power to the external load in the main circuit of the board will not be closed, and this part of the circuit cannot be closed after the external load no longer needs power supply, which will cause the problem that the display device cannot enter the standby state

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