Patent ID: 6525710
Filing Date: 2003-02-25
Classification: G09G

Abstract:
A source driver of a liquid crystal display for applying video signals to n data lines of the liquid crystal display which includes first and second plates and liquid crystal sealed in between the plates, wherein each data line is associated with two columns of pixels, comprising:a shift register which shifts a horizontal synchronous signal pulse and then outputs a latch clock; a first sampling latch having n channels, which samples and latches digital video signals corresponding to the odd-numbered pixel columns among 2n pixel columns according to the latch clock output from the shift register; a second sampling latch having n channels, which samples and latches digital video signals corresponding to the even-numbered pixel columns among the 2n pixel columns according to the latch clock output from the shift register; a holding latch which receives and latches the data stored in the first sampling latch according to a first load signal and which receives and latches the data stored in the second sampling latch according to a second load signal; a D/A converter which converts the digital video signals corresponding to the odd-numbered pixel columns or the digital video signals corresponding to the even-numbered pixel columns stored in the holding latch into analog data signals; and an amplifier which amplifies the analog video signals corresponding to the odd-numbered pixel columns or the analog video signals corresponding to the even-numbered pixel columns supplied from the D/A converter.