Patent ID: 8830155
Filing Date: 2014-09-09
Classification: G09G

Abstract:
1. A source driver for driving a display panel to display an image data in an adaptive column inversion, wherein the display panel comprises a plurality of pixels spatially arranged in a matrix form and a plurality of data lines, each data line being associated with pixels of a corresponding pixel column, wherein the image data is decomposed into a number of frames, and wherein each frame of the image data is mapped onto the pixel matrix with grey levels such that a grey level associated with a pixel is corresponding to a shade of grey of the frame to be displayed at the pixel, comprising: (a) a data processing unit adapted for determining the grey levels of the image data mapped onto the pixel matrix; (b) a MUX coupled to the data processing unit and adapted for receiving a frame polarity control signal, FramePOL, and a pixel polarity control signal, XPOL, and outputting a polarity control signal, POL, that is corresponding one of FramePOL and XPOL according to the determined grey levels of the image data; (c) a switch module coupled to the MUX and controlled by the polarity control signal POL; (d) a first digital-to-analog converter with a positive polarity (PDAC) adapted for receiving a first digital signal associated with the image data and converting the first digital signal into a first analog signal; (e) a second digital-to-analog converter with a negative polarity (NDAC) adapted for receiving a second digital signal associated with the image data and converting the second digital signal into a second analog signal; (f) a first operational amplifier coupled to the PDAC and the NDAC through the switch module and adapted for receiving one of the first analog signal from the PDAC and the second analog signal from the NDAC and outputting a first data signal to an odd data line of the plurality of data line; and (g) a second operational amplifier coupled to the PDAC and the NDAC through the switch module and adapted for receiving other of the first analog signal from the PDAC and the second analog signal from the NDAC and outputting a second data signal to an even data line of the plurality of data line, wherein when the determined grey levels are greater than Lm or less than Ln, the polarity control signal POL is the frame polarity control signal FramePOL, and otherwise the polarity control signal POL is the pixel polarity control signal XPOL, and wherein 0 <Ln <Lm <Lmax, and Lmax =(2 n −1) being a maximal grey level of n bits; and wherein when the determined grey levels are greater than Lm or less than Ln, pixels of the pixel matrix associated with the determined grey levels are driven with a column inversion, and other pixels of the pixel matrix are driven with one of a dot inversion and a 2-line inversion.