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Source driver and operation method and driving circuit thereof

A technology of source driver and drive circuit, which is applied to instruments, static indicators, etc., can solve the problems of increased power consumption of liquid crystal displays, and achieve the effect of reducing static power consumption

Active Publication Date: 2016-05-11
NOVATEK MICROELECTRONICS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the above, when the power consumption of the source driver increases, the overall power consumption of the LCD will also increase

Method used

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  • Source driver and operation method and driving circuit thereof
  • Source driver and operation method and driving circuit thereof
  • Source driver and operation method and driving circuit thereof

Examples

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Embodiment Construction

[0088] figure 1 It is a schematic diagram of a display system according to an embodiment of the present invention. Please refer to figure 1 , in this embodiment, the display 100 includes a display panel 110 and a driving circuit 111 for driving the display panel 110 , wherein the driving circuit 111 includes, for example, a timing controller 120 and a source driver 130 . The timing controller is used for receiving an image signal Simage to provide display data DP1 to the source driver 130 .

[0089] The source driver 130 includes, for example, a digital control circuit 131 , a reference voltage driving circuit 133 , a digital-to-analog converter 135 , a gamma voltage generating circuit 137 and a first voltage buffer BF1 . The gamma voltage generating circuit 137 receives the internal reference voltage VRI to provide a first grayscale reference voltage VGR1 corresponding to a first display grayscale (eg, one of grayscale values ​​0˜255). The digital control circuit 131 recei...

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Abstract

The invention provides a source driver and an operation method and a driving circuit thereof. The source driver comprises a gamma voltage generation circuit, a first voltage buffer and a reference voltage driving circuit. The gamma voltage generation circuit receives an internal reference voltage to provide a first grayscale reference voltage corresponding to a first display grayscale. The first voltage buffer is used for receiving the first grayscale reference voltage to provide a driving voltage. The reference voltage driving circuit is coupled to the gamma voltage generation circuit and the first voltage buffer, and is used for accelerating the rise or fall of the first grayscale reference voltage. According to the source driver and the operation method and the driving circuit thereof provided by the embodiments of the invention, the reference voltage driving circuit accelerates the rise or fall of the first grayscale reference voltage when the first grayscale reference voltage is in a transient state. Therefore, the static power consumption of the source driver can be reduced without affecting the operation of the source driver.

Description

technical field [0001] The invention relates to a driver, in particular to a source driver, its operation method and its driving circuit. Background technique [0002] In recent years, consumer electronic products have been continuously introduced, and Liquid Crystal Displays (Liquid Crystal Displays), which have the characteristics of light weight, short size, no space, no radiation, low power consumption, no high heat generation, long service life, and soft pictures, are widely used. as the screen output interface. In the liquid crystal display, the image data required by the liquid crystal display panel is provided through the source driver, and the multiple data channels of the source driver adjust the output driving voltage according to the corresponding image data. [0003] According to the above, when the power consumption of the source driver increases, the overall power consumption of the LCD will also increase. Therefore, how to reduce the power consumption of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 洪国哲陈季廷
Owner NOVATEK MICROELECTRONICS CORP
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