US Patent 7499056 Display device and display control circuit

In forward scanning, a timing control unit outputs the display data in the same sequence as the input display data. In backward scanning, on the other hand, the timing control unit inverts the output sequence of the display data for one line (for one horizontal cycle). Upon input of a scan direction control signal indicating backward scanning, the timing control unit executes sequence change processing by using line memory. The display data in which the sequence of the pixel data is reversed is outputted together with the control signals. It is able to select whether to output data in an inverted sequence or in a normal sequence according to the scan direction control signal.