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Charge pump circuit and gate turn-on voltage generation circuit

A charge pump and circuit technology, applied in the direction of conversion equipment without intermediate conversion to AC, to achieve the effect of reducing power consumption

Active Publication Date: 2018-01-26
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and proposes a charge pump circuit and a gate turn-on voltage generation circuit, which can not only reduce power consumption at low load, but also avoid There will be no problems with insufficient drive capacity

Method used

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  • Charge pump circuit and gate turn-on voltage generation circuit
  • Charge pump circuit and gate turn-on voltage generation circuit

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Embodiment 1

[0026] figure 2 The functional block diagram of the charge pump circuit provided for the embodiment of the present invention; image 3 A specific circuit diagram of the charge pump circuit provided by the embodiment of the present invention. Please also refer to figure 2 and image 3 , the embodiment of the present invention provides a charge pump circuit, including a load monitoring module 10, a voltage conversion module 11, an input module 12, an output module 13, a first level input terminal DD and a second level input terminal AVDD, the first level input terminal Terminal DD is used to input the first level V DD , the second level input terminal AVDD is used to input the second level V AVDD . Wherein, the first level input terminal DD and the second level input terminal AVDD are respectively connected to the input module 12 .

[0027] The load monitoring module 10 is connected to the output terminal of the output module 13 and the input terminal of the input module...

Embodiment 2

[0050] An embodiment of the present invention provides a gate turn-on voltage generating circuit, including a charge pump circuit, and the charge pump circuit adopts the above-mentioned embodiment 1 to provide a charge pump circuit.

[0051]Since the present invention adopts the charge pump circuit provided by the above-mentioned embodiment 1, it can not only reduce the power consumption at low load, but also avoid the problem of insufficient driving capability at high load.

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Abstract

The invention provides a charge pump circuit which comprises a load monitoring module, a voltage conversion module, an input module, an output module and multiple ways of level input ends. The level input ends are connected with the input module separately; the load monitoring module is connected with the output end of the output module and the input end of the input module and used for monitoring a load of the output end of the output module, generating a control signal according to the load and sending the control signal to the input end of the input module; the output end of the input module is connected with the input end of the voltage conversion module, and the input module is used for selecting and outputting a level input by one way of the level input ends according to the control signal; the output end of the voltage conversion module is connected with the input end of the output module, and the voltage conversion module is used for converting and outputting the level output by the input module; the output module is used for processing and outputting the level output by the voltage conversion module. The charge pump circuit can reduce power consumption at a low load and cannot generate the insufficient driving capacity problem at a high load.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a charge pump circuit and a gate opening voltage generation circuit. Background technique [0002] A power management chip of a thin film transistor liquid crystal display (ie, TFT-LCD) mainly includes modules such as a boost circuit, a step-down circuit, a positive charge pump circuit, and a negative charge pump circuit. Compared with other switching power supplies, the charge pump circuit is small in size and simple in structure, and is often used for TFT gate driving. The positive charge pump circuit is mainly used to provide the TFT gate turn-on voltage. [0003] figure 1 For an existing charge pump circuit diagram, see the figure 1 , the charge pump circuit passes the input voltage terminal V in , four diodes, four capacitors and the square wave control signal input end SW form a triple charge pump boost, the output voltage V1=V in +2V sw -4V ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
CPCH02M3/07
Inventor 张剑
Owner BOE TECH GRP CO LTD