LCD and its driving circuit

A liquid crystal display and driving circuit technology, applied in static indicators, lamp circuit layout, instruments, etc., can solve the problems of poor screen display quality and easy to generate boot noise, so as to ensure the screen display quality and avoid boot noise. Effect

Inactive Publication Date: 2008-04-02
INNOCOM TECH (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problem that the liquid crystal display drive circuit in the prior art is prone to generate startup noise, it is necessary to provide a liquid crystal display driver circuit that can avoid the startup noise
[0011] In order to solve the problem in the prior art that the display quality of the picture is not good because the driving circuit of the liquid crystal display is prone to generate noise when starting up, it is also necessary to provide a liquid crystal display with better quality of picture display

Method used

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  • LCD and its driving circuit

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Embodiment Construction

[0019] Please refer to FIG. 3 , which is a schematic diagram of the circuit structure of the first embodiment of the liquid crystal display of the present invention. The liquid crystal display 3 includes a liquid crystal display driving circuit 30 , a display panel 31 and a backlight module 32 . The backlight module 32 provides planar light for the display panel 31 . The LCD drive circuit 30 provides working voltage for the display panel 31 and the backlight module 32 , and converts video signals and synchronization signals from external circuits into working signals required by the LCD 3 . The working signal usually includes converted video signal, synchronous signal, clock signal and so on.

[0020] The LCD driving circuit 30 includes a power supply circuit 34 , a driving integrated circuit 35 , a scan driving circuit 36 ​​and a data driving circuit 37 . The power supply circuit 34 provides working voltages of +5V and +12V for the driving integrated circuit 35 . The drivi...

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Abstract

The invention relates to an LCD drive circuit and an LCD, wherein, the LCD drive circuit comprises a feed circuit, a backlight control circuit and a counter, wherein, the feed circuit provides working voltage for the LCD drive circuit; the backlight control circuit controls whether the working voltage of the feed circuit is transferred to a backlight module of the LCD; the counter records the number of the pulses input by an external circuit and comprising a default, and when the number of the pulses recorded by the counter reaches the default, the counter produces a trigger signal to conduct the backlight control circuit which controls the working voltage of the feed circuit to be transferred to the backlight module of the LCD. The LCD drive circuit can avoid starting-up noise.

Description

technical field [0001] The invention relates to a liquid crystal display drive circuit and a liquid crystal display using the liquid crystal display drive circuit. Background technique [0002] Liquid crystal displays have been widely used in electronic devices such as personal computers due to their advantages of thinness, high brightness, and low radiation. When using a liquid crystal display, it is necessary to turn on the backlight source and provide a working signal to drive the liquid crystal display. However, at the moment of power-on, the transmitted working signal is unstable, which will interfere with the liquid crystal display, resulting in undesirable phenomena such as power-on noise. [0003] FIG. 1 is a schematic diagram of a circuit structure of a prior art liquid crystal display. The liquid crystal display 1 includes a liquid crystal display driving circuit 10 , a display panel 11 and a backlight module 12 . The backlight module 12 provides planar light fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G09G3/34G02F1/133H05B37/02
CPCG09G2330/026G09G3/3648G09G2320/02G09G2330/02G09G3/3406
Inventor 符占伟
Owner INNOCOM TECH (SHENZHEN) CO LTD
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