Liquid crystal display device

摘要

In a liquid crystal display device that performs two-line inversion driving, a difference of a write period of a substantial video signal between a pair of pixel rows scanned with the same polarity is compensated. An input signal pre-processing circuit 42 receives display data DATA and an original data enable signal DTMG, generates and inputs a data enable signal DTMG_R and display data DATA_R to a driver control signal generation block 40. DTMG_R is reduced in the active period, and an interval of the active period between a (2n−1)-th row and a 2n-th row is set to be larger than an interval of the active period between the 2n-th row and a (2n+1)-th row. The input signal pre-processing circuit 42 reads out DATA of each row from a buffer as DATA_R in an active period of DTMG_R.

主权项

1. A liquid crystal display device, comprising:
a plurality of pixels which is arranged in a matrix; a plurality of video signal lines which is provided in correspondence with a plurality of pixel columns, and supplies video signals to the pixels; a plurality of scanning signal lines which is provided in correspondence with a plurality of pixel rows, and is supplied in turn with scanning signals for selecting a scanning row to which the video signals are supplied among the pixel rows; a video signal line driver circuit into which the display data corresponding to one of the pixel rows is written, and which generates the video signal on the basis of the display data and outputs the video signals to the plurality of video signal lines in parallel when an output timing signal is input to the video signal line driver circuit; and a display control circuit that receives the display data from an external by serial transmission, outputs the display data and the output timing signal to the video signal line driver circuit, and performs line inversion driving of the pixels every two rows, wherein the display control circuit writes the display data into the video signal line driver circuit on at least a preceding scanning row of a pair of the pixel rows which are adjacent to each other and supplied with the video signals of the same polarity, at a speed higher than a transmission speed from the external, and sets an output period of the video signals on the preceding scanning row to be longer than an output period of the video signals on a following pixel row of the preceding scanning row, the output period for each of the pixel rows being determined according to a cycle of the output timing signal.