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D.C voltage converter

A DC voltage and converter technology, applied in the field of DC voltage converters, can solve the problems of increasing system cost and power consumption

Active Publication Date: 2008-10-01
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the liquid crystal display using the DC voltage converter disclosed in US Patent No. 6,509,894 must use an additional 5V DC voltage source, which increases system cost and power consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Please refer to Figure 3A, which represents a circuit diagram of a DC voltage converter for generating a three-times amplified output voltage according to the first embodiment of the present invention. The DC voltage converter 300 includes a first voltage generating unit 310 , a second voltage generating unit 320 , a first storage unit 330 , a second storage unit 340 , a first selection switch 350 and a second selection switch 360 . The DC voltage converter 300 utilizes the clock signal CLK of the shift register (not shown in the figure) of the display panel (not shown in the figure) and the input voltage VDD of the display panel to obtain the output voltage Vo1.

[0043] The first voltage generating unit 310 receives the clock signal CLK, and outputs the control voltage Vc1. The first storage unit 330 receives the clock signal CLK1 and outputs a storage voltage Vs1. Under the control of the control voltage Vc1, the first selection switch 350 outputs the storage volt...

Embodiment 2

[0060] Please refer to Figure 4A , which represents a circuit diagram of a DC voltage converter for generating negative twice the output voltage according to a second embodiment of the present invention. The DC voltage converter 400 includes a third voltage generating unit 410 , a fourth voltage generating unit 420 , a third storage unit 430 , a fourth storage unit 440 , a third selection switch 450 and a fourth selection switch 460 . The DC voltage converter 400 utilizes the clock signal CLK of the shift register (not shown in the figure) of the display panel (not shown in the figure) and the input voltage VDD of the display panel to obtain the DC voltage Vo2.

[0061] The third voltage generation unit 410 receives the clock signal CLK and outputs the control voltage Vc3. The third storage unit 430 receives the clock signal CLK3 and outputs a storage voltage Vs3. Under the control of the control voltage Vc3, the third selection switch 450 outputs the stored voltage Vs3 as ...

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Abstract

DC voltage converter converts an input voltage to first output voltage. Input voltage is inputted to first and second switch modules. The first switch module is controlled by first signal. One end of first capacitance receives the first signal, and other end connected to the first switch module outputs to first control voltage. Second switch module is controlled by first control voltage. One end of the second capacitance receives second signal, and other end connected to second switch module electrically outputs first storage voltage. Based on level of first control voltage, the first selection switch outputs first storage voltage as first output voltage in selection. First signal and second signal are converted to first and second electrical levels at different time alternately.

Description

technical field [0001] The present invention relates to a DC voltage converter, and in particular to a DC voltage converter capable of generating triple-amplified and negatively-doubled output voltages. Background technique [0002] DC voltage converter (DC-DC Converter) is a circuit that converts the input DC voltage value output into another DC voltage value. This circuit can amplify the input DC voltage and convert the input DC voltage to a negative voltage output. , has the advantages of low voltage input and low power consumption, and has been widely used in various electronic products. [0003] For low-temperature polysilicon liquid crystal displays, because of the technology that can integrate circuits on glass substrates, if the DC voltage converter is integrated on the panel, it can also achieve reduced peripheral area, low-voltage power supply, and single DC voltage source input. , low cost and can be applied to the advantages of portable electronic products. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/06
Inventor 张忆婷
Owner AU OPTRONICS CORP