Power supply circuit

A technology of power supply circuit and power supply circuit, applied in static indicators, instruments, etc., can solve the problems of small interference and large power supply circuit interference, and achieve the effect of small noise interference and short lead wires

Inactive Publication Date: 2008-05-07
INNOCOM TECH SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problem of large power supply circuit interference in the prior art, it is necessary to provide a power supply circuit with little interference

Method used

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Examples

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Embodiment Construction

[0017] Please refer to image 3 , which is a schematic structural diagram of a preferred embodiment of the power supply circuit of the present invention. The power supply circuit 3 includes an interface board 30 and a power supply circuit 31, the interface board 30 includes a first DC-to-DC conversion circuit 32, and the interface board 30 is provided with a plurality of interfaces (not shown), the multiple An interface is used to transmit control signals to the drive circuit 38 of the liquid crystal display device using the power supply circuit 3, the power supply circuit 31 includes an AC to DC conversion circuit 37, a second DC to DC conversion circuit 35 and an inverter 33 .

[0018] The AC-to-DC conversion circuit 37 of the power supply circuit 31 is used to convert the AC voltage provided by the external power supply network into a 12V DC voltage, and provide the 12V DC voltage to the first DC-to-DC conversion circuit 32, the second DC to DC conversion circuit 35 and t...

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PUM

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Abstract

The invention discloses a power supply circuit, comprising a interface board and a power supply circuit; wherein, the interface comprises a switching circuit from a first direct current to a direct current; the power supply circuit comprises a switching circuit from an alternating current (AC) to a direct current and an inverter; in addition, the power supply circuit also comprises a switching circuit from a second direct circuit to a direct circuit; the switching circuit from the alternating circuit (AC) the direct circuit provides DC voltage for the switching circuit from the first direct current to the direct current, the switching circuit from the second direct current to the direct circuit and the inverter; the switching circuit from the second direct circuit to the direct circuit provides the needed working voltage for a main control chip of the inverter.

Description

technical field [0001] The present invention relates to a power supply circuit, in particular to a power supply circuit for a liquid crystal display device. Background technique [0002] Liquid crystal display devices have been widely used in the fields of mobile phones, personal digital assistants, notebook computers, personal computers, and televisions due to their low radiation, small size, and low power consumption. In the power supply circuit of the liquid crystal display device, the power supply circuit is used to provide various stable working voltages required by each working module of the liquid crystal display device, and the interface board (Interface Board) is used to transmit control to the drive circuit of the liquid crystal display device. Signal. [0003] Please refer to figure 1 , which is a structural schematic diagram of a prior art power supply circuit. The power supply circuit 1 includes a power supply circuit 11 and an interface board 10, the power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/36
Inventor 乐昆周通
Owner INNOCOM TECH SHENZHEN
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