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Charge pump device and control method thereof

A charge pump and control terminal technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problems of high cost, high integration difficulty, large area, etc.

Active Publication Date: 2017-07-18
GALAXYCORE SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problems of high cost and high integration difficulty caused by the large area of ​​the existing charge pump device

Method used

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  • Charge pump device and control method thereof
  • Charge pump device and control method thereof
  • Charge pump device and control method thereof

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Embodiment Construction

[0069] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0070] like figure 2 As shown, the embodiment of the present invention provides a charge pump device, including: a first-stage charge pump circuit 1 and a second-stage charge pump circuit 2 .

[0071] The first-stage charge pump circuit 1 is adapted to output the first-stage voltage VOUT1 according to the input voltage VIN, the voltage value of the first-stage voltage VOUT1 is Vout1=m*Vin, and Vin is the value of the first-stage charge pump circuit 1 The voltage value of the input voltage VIN. The second-stage charge pump circuit 2 is adapted to generate a second-stage first voltage VOUT21 and a second-stage second voltage VOUT22 according to the first-stage voltage VOUT1, and the voltage value of the second-stage first voltage Vout21=( ...

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Abstract

Provided are a charge pump device and a control method of the charge pump device. The charge pump device comprises a first-stage charge pump circuit and a second-stage charge pump circuit. The first-stage charge pump circuit is suitable for outputting a first-stage voltage according to input voltages, according to the voltage value Vout1 of the first-stage voltage, Vout1= m*Vin, and Vin is the voltage value of the input voltage of the first-stage charge pump circuit. The second-stage charge pump circuit is suitable for generating a second-stage first voltage and a second-stage second voltage according to the first-stage voltage, according to the voltage value Vout21 of the second-stage first voltage, Vout21=(p+m)*Vin, according to the voltage value Vout22 of the second-stage second voltage, Vout22=(q-m)*Vin, and m, q and p are arbitrary numbers.

Description

technical field [0001] The invention relates to a charge pump device and a control method thereof. Background technique [0002] With the increasing demand for handheld electronic devices such as mobile phones and tablet computers, people's requirements for image display are also increasing, from traditional black and white screens to high-definition high-resolution displays such as color retina screens. Therefore, these display requirements and the development of technology undoubtedly pose a challenge to the design of liquid crystal display (Liquid Crystal Display, LCD) and its driving circuit device used in handheld terminals with high performance and low cost. [0003] As the core unit circuit of the LCD driver chip, the charge pump can provide the positive and negative voltage multipliers required to drive the display panel. [0004] Such as figure 1 As shown, taking the generation of +3 times and -2 times the voltage as an example, the positive and negative voltages ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
CPCH02M3/07
Inventor 张科王富中
Owner GALAXYCORE SHANGHAI
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