Patent ID: 7292217
Filing Date: 2007-11-06
Classification: G09G

Abstract:
1. A source driver for driving sources of a plurality of thin film transistors, the source driver comprising: a shift register, for receiving digital image data; a latch, coupled to the shift register, for receiving digital image data from the shift register; a first level shifter with a positive polarity and a second level shift with a negative polarity, coupled to the latch, for receiving digital image data from the latch and for shifting a voltage level of digital image data; and a first analog circuit with a positive polarity and a second analog circuit with a negative polarity, coupled to the first level shifter with the positive polarity and the second level shifter with the negative polarity respectively, for receiving the digital image data, converting the digital image data to a corresponding analog image data, and outputting the analog image data to the plurality of sources of the thin film transistors; wherein a power supply voltage level and a middle voltage level between the power supply voltage level and a ground voltage level are provided to the first level shifter with the positive polarity and the first analog circuit with the positive polarity; and the middle voltage level and the ground voltage level are provided to the second level shifter with the negative polarity and the second analog circuit with the negative polarity.