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Source driver

A source driver and drive circuit technology, applied in instruments, static indicators, etc., can solve problems such as affecting the quality of liquid crystal images and long inversion time

Inactive Publication Date: 2013-01-23
NOVATEK MICROELECTRONICS CORP
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Problems solved by technology

However, the inversion time of the row polarity inversion mode is too long, which will easily affect the image quality of the LCD

Method used

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Embodiment Construction

[0034] The main power consumption of the source driver lies in the operation power consumption of frequently inverting the polarity, among which the dot inversion mode consumes the most power, and the column inversion mode is the opposite of the polarity inversion mode. Power-saving polarity inversion mode. In consideration of both image quality and energy consumption, in this embodiment, multiple channel groups of the source driver are respectively dynamically operated in the dot inversion mode and the row inversion mode according to the liquid crystal transmittance versus voltage characteristic curve. By dynamically switching the polarity inversion mode, the source driver can select an appropriate gray scale for row inversion, so as to achieve a balance point of saving power without significantly affecting the screen display.

[0035] figure 1 is a functional block diagram illustrating an embodiment of a channel group in the source driver 100 . Please refer to figure 1 , ...

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Abstract

The invention provides a source driver, consisting of a channel drive circuit, a polarity control circuit and a boundary judging unit, to the source driver aims at avoiding the picture anomaly caused by the polarity control circuit and special input data, such as the input data of a forward read continuous (FRC) algorithm. The source driver uses the boundary judging unit of the source driver to prevent the situation of picture anomaly.

Description

technical field [0001] The invention relates to a display device, and in particular to a source driver capable of dynamically switching between various liquid crystal polarity inversion modes. Background technique [0002] Due to the characteristic relationship of the liquid crystal itself, it is necessary to frequently reverse the polarity of the liquid crystal when driving the liquid crystal. According to different energy consumption requirements, many different polarity inversion modes of liquid crystals have also been developed. For example, a column inversion mode or a dot inversion mode, etc. The main power consumption of the source driver lies in the operation power consumption of frequently inverting the polarity, among which the dot polarity inversion mode consumes the most power, and the row polarity inversion mode is the relatively power-saving pole in the polarity inversion mode. Sex reversal mode. However, the inversion time of the row polarity inversion mode...

Claims

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Application Information

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IPC IPC(8): G09G3/20G09G3/36
Inventor 杨舜勋
Owner NOVATEK MICROELECTRONICS CORP
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