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Charge pump and operating method thereof

A technology of charge pump and capacitor, which is applied in the direction of conversion equipment, instruments, static indicators, etc. without intermediate conversion to AC. It can solve the problems that the output voltage cannot be provided, the charge pump cannot achieve charge transfer, etc., and achieve the best charge transfer effect.

Active Publication Date: 2018-08-10
RAYDIUM SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional charge pump can provide the output voltage VOUT equal to (-1 / 2) times of the input voltage VIN to the load capacitor CLOAD through the operation of the capacitors C1~C2 and the switches SW1~SW7, the traditional charge pump still cannot provide the output voltage equal to The output voltage VOUT is (-2 / 3) times of the input voltage VIN, so the traditional charge pump still cannot achieve the best charge transfer, which needs to be improved urgently

Method used

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  • Charge pump and operating method thereof
  • Charge pump and operating method thereof
  • Charge pump and operating method thereof

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Embodiment Construction

[0063] A specific embodiment according to the present invention is a charge pump. In this embodiment, the charge pump can be applied in a source driver of an OLED display panel (such as an AMOLED display panel) to receive an input voltage and provide an output voltage to a load capacitor, but not limited thereto.

[0064] Please refer to figure 2 , figure 2 A schematic circuit diagram of the charge pump in this embodiment. Such as figure 2 As shown, the charge pump in this embodiment is composed of 10 switches and 3 capacitors, which include a first capacitor C1, a second capacitor C2, a third capacitor C3, a first switch SW1, a second switch SW2, The third switch SW3 , the fourth switch SW4 , the fifth switch SW5 , the sixth switch SW6 , the seventh switch SW7 , the eighth switch SW8 , the ninth switch SW9 and the tenth switch SW10 .

[0065] The first switch SW1 and the second switch SW2 are connected in series between the input voltage VIN and the ground terminal GND...

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Abstract

A charge pump and operating method thereof are disclosed. The charge pump includes a first capacitor to a third capacitor and a first switch to a tenth switch. The charge pump is used to receive an input voltage and provide an output voltage to a load capacitor. When the charge pump is operated in a first mode, the charge pump controls the second capacitor failure, the output voltage and the inputvoltage have opposite electricity and the output voltage is (-1 / 2) times the input voltage. When the charge pump is operated in a second mode, the charge pump controls the second capacitor failure, the output voltage and the input voltage have opposite electricity and the output voltage is (-2 / 3) times the input voltage.

Description

technical field [0001] The present invention is related to the display panel, in particular to a charge pump applied to the organic light emitting diode display panel and its operation method. Background technique [0002] The source driver of a traditional organic light emitting diode display panel (such as an AMOLED display panel) usually has a built-in charge pump. A charge pump is a DC-DC converter that uses a capacitor as an energy storage element, and is mostly used to generate an output voltage greater than the input voltage, or to generate a negative output voltage. [0003] Such as figure 1 As shown, a conventional charge pump may include capacitors C1 - C2 and switches SW1 - SW7 . Although the traditional charge pump can provide the output voltage VOUT equal to (-1 / 2) times of the input voltage VIN to the load capacitor CLOAD through the operation of the capacitors C1~C2 and the switches SW1~SW7, the traditional charge pump still cannot provide the output voltage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07
CPCH02M3/07G09G3/3208G09G2330/02G09G2330/023G09G2330/028
Inventor 陈利杰钱宣浩洪志任
Owner RAYDIUM SEMICON