Patent ID: 8570263

Claim:
An electronic equipment comprising: a display device including a plurality of pixels over a substrate; an LED backlight; a D/A converter circuit; and a circuit which converts m-bit digital video data into n-bit digital video data, wherein the m and the n are integers equal to or larger than 2 and satisfy m>n, wherein n-bit information out of the m-bit digital video data is used for a voltage gray scale method and (m−n)-bit information is used for a time ratio gray scale method, wherein each of a voltage level for the voltage gray scale method is designated as (VH−VL)/2 n , where VH is the highest voltage level of voltages inputted to the D/A converter circuit, and VL is the lowest voltage level of voltages inputted to the D/A converter circuit, and wherein one frame period includes 2 m-n subframe periods.