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Liquid crystal display device module and voltage generating circuit thereof

A technology for voltage generating circuits and liquid crystal display devices, which is applied in electrical components, electronic switches, static indicators, etc., and can solve problems such as large circuit area, large volume of inductance and diodes, and the influence of inductance.

Inactive Publication Date: 2009-11-11
INNOLUX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the pulse width modulation chip in the boost circuit 150 generates the second voltage V2 with the nature of the implied frequency signal through the switching action, it will affect the inductance, thereby causing the problem of Electromagnetic Interference (EMI)
In addition, inductors and diodes usually have large volumes, occupying a large amount of circuit area, and the price of pulse width modulation chips is relatively high, making the cost high

Method used

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  • Liquid crystal display device module and voltage generating circuit thereof
  • Liquid crystal display device module and voltage generating circuit thereof
  • Liquid crystal display device module and voltage generating circuit thereof

Examples

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Embodiment Construction

[0013] The invention provides a liquid crystal display device module and its voltage generating circuit. The integrated power supply device of the voltage generating circuit provides two voltages, and uses a simple circuit structure to provide a high-voltage potential voltage to the pump circuit.

[0014] refer to figure 2 , which shows a block diagram of a liquid crystal display device module according to a preferred embodiment of the present invention. The liquid crystal display device module 200 includes a liquid crystal panel 210 , a gate driving unit 220 , a source driving unit 230 , a microprocessor control unit 240 and a voltage generating circuit 250 . The liquid crystal panel 210 has a plurality of pixels (not shown in the figure), which are driven by the gate driving unit 220 and the source driving unit 230 . The microprocessor control unit 240 is used to generate the clock signal CLK, and the high voltage level of the clock signal CLK is about 3.3 volts.

[0015] ...

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Abstract

The invention relates to a voltage generating circuit for supplying a plurality of voltage to a liquid crystal display device. The voltage generating circuit comprises an integrated power supply device, a switching control circuit and a pump circuit, wherein the integrated power supply device is used for generating first voltage and second voltage, and the second voltage is higher than the first voltage; the switching control circuit is coupled with the integrated power supply device and outputs the second voltage or ground voltage according to a frequency signal; and the pump circuit is coupled to the switching control circuit and supplies third voltage to the liquid crystal display device according to the second voltage.

Description

technical field [0001] The invention relates to a liquid crystal display device module and its voltage generating circuit, and in particular to a liquid crystal display device module and its voltage generating circuit which can reduce costs. Background technique [0002] Referring to FIG. 1 , it illustrates a block diagram of a conventional liquid crystal display device module. The liquid crystal display device module 100 includes a liquid crystal panel 110, a gate driver unit 120, a source driver unit 130, an integrated power supply device (LCD Integrated Power Supply, LIPS) 140, a boost circuit 150, a first pump circuit 160 and a second pump circuit. circuit 170. The liquid crystal panel 110 includes a plurality of pixels (not shown in the figure), the gate driving unit 120 is used for enabling the pixels, and the source driving unit 130 is used for driving the pixels. [0003] The integrated power supply device 140 is used to generate a first voltage V1, such as 5 volts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36H03K17/687
Inventor 张亨菖汤宪忠
Owner INNOLUX CORP
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