Patent ID: 8044911
Filing Date: 2011-10-25
Classification: G09G

Abstract:
1. A source driving circuit comprising: a source driver circuit that receives display data and generates a source driving voltage corresponding to the received display data; an intermediate voltage generator that generates an intermediate source driving voltage; and a switching control unit that receives a plurality of control signals for selectively applying the source driving voltage and the intermediate source driving voltage to data lines of a display as a driving voltage and controls an order of transition to final levels of a common electrode voltage and the driving voltage such that the driving voltage transits to the final level prior to the common electrode voltage when the driving voltage transits to a lowest grayscale reference voltage and the common electrode voltage transits to a high common voltage or when the driving voltage transits to a highest grayscale reference voltage and the common electrode voltage transits to a low common voltage, the common electrode voltage being applied to a common electrode of a liquid crystal capacitor coupled to the data line of the display, wherein the switching control unit comprises: a panel type selector that outputs a panel select signal based on a data pattern bit of the display data and a panel type signal of the plurality of control signals; a first switching signal controller that controls a timing for applying the intermediate source driving voltage to the data lines based on the panel select signal and first and second control signals of the plurality of control signals; a second switching signal controller that controls a timing for applying the source driving voltage to the data lines based on the panel select signal and third and fourth control signals of the plurality of control signals; a first switch that selectively connects the intermediate source driving voltage to the data lines in response to an output signal of the first switching signal controller; and a second switch that selectively connects the source driving voltage to the data lines in response to an output signal front the first switching signal controller.