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Integrated source driver and liquid crystal display thereof

A source driver, liquid crystal display technology, applied to static indicators, instruments, etc., can solve the problem of high hardware consumption

Active Publication Date: 2014-05-21
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, if the known external reference voltage generator 12 and the known source driver 10 are directly integrated into the integrated source driver, since the number of reference voltages required by the source driver 10 is large, if the adjustment range of the reference voltage is still the same as the known External reference voltage generator 12 rail-to-rail adjustment range is the same, and maintain high adjustment resolution, the hardware consumption will be quite large

Method used

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  • Integrated source driver and liquid crystal display thereof
  • Integrated source driver and liquid crystal display thereof
  • Integrated source driver and liquid crystal display thereof

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Embodiment Construction

[0051] Please refer to figure 2 , figure 2 It is a schematic diagram of an integrated source driver 20 according to an embodiment of the present invention. Such as figure 2 As shown, the integrated source driver 20 includes a reference voltage generation circuit 202, a positive polarity reference voltage selection circuit 204, a negative polarity reference voltage selection circuit 206, a positive polarity voltage buffer PVB 1 ~PVB m , Negative voltage buffer NVB 1 ~NVB m and a source driving circuit 208 .

[0052] In short, the reference voltage generation circuit 202 provides a positive polarity adjustable voltage range PAVR between a power supply voltage VS and a ground level GND. 1 ~PAVR m , Negative polarity adjustable voltage range NAVR 1 ~NAVR m The reference voltage selection circuits 204, 206, the reference voltage selection circuits 204, 206 respectively include a digital to analog converter (digital to analog converter, DAC) PDAC 1 ~PDAC m 、NDAC 1 ~ND...

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Abstract

The invention discloses an integrated source driver applied to a liquid crystal display. The integrated source driver comprises a reference voltage generating circuit, for providing a plurality of adjustable voltage ranges between a power supply voltage and a grounding level; a reference voltage selecting circuit, including a plurality of digital to analogue converters, for respectively selecting in the plurality of adjustable voltage ranges to generate a plurality of internal reference voltages according to a control signal, wherein the plurality of adjustable voltage ranges are decreased progressively.

Description

technical field [0001] The present invention relates to an integrated source driver and its liquid crystal display, in particular to a device that can integrate external reference voltage devices and limit the adjustable voltage range of each internal reference voltage generated to save hardware consumption or increase voltage Adjustable resolution integrated source driver and its liquid crystal display. Background technique [0002] Due to the low price and high quality of liquid crystal displays, liquid crystal displays have been widely used in information products such as notebook computers (notebooks), personal digital assistants (PDAs), mobile phones, and clocks. [0003] A liquid crystal display is mainly composed of a single or multiple source drivers, a single or multiple gate drivers and a panel. The source driver and the gate driver are respectively used to control the criss-crossing data lines (data lines) and scan lines (scan lines) in the panel, and a thin film...

Claims

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Application Information

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IPC IPC(8): G09G3/36
Inventor 曾柏瑜苏嘉伟方柏翔杨舜勋李信宏
Owner NOVATEK MICROELECTRONICS CORP