Patent ID: 7884794
Filing Date: 2011-02-08
Classification: G09G

Abstract:
1. A data line driver for driving data lines of a display apparatus, comprising: a data register adapted to latch video data in synchronization with latch signals of a shift register and to latch definite non-video gradation data in synchronization with a definite non-video gradation start signal from an external controller via a data bus; a data latch circuit adapted to latch the video data and the definite non-video gradation data at different timings to generate digital output signals of said data latch circuit into analog signals; a digital/analog converter adapted to convert the digital output signals of said data latch circuit into analog signals; an output buffer adapted to apply the analog signals of said digital/analog converter to said data lines; and a selector connected to said data bus and a definite non-video gradation data latch circuit, said selector adapted to select the video data or the definite non-video gradation data in accordance with a definite non-video gradation data enable signal.