Patent ID: 9449564
Filing Date: 2016-09-20
CPC Classification: G09G

Claim Text:
1. A controller for adjusting a signal outputted to a hold-type image display panel, comprising: a video signal converting part having a double-speed drive conversion function which divides one frame of a video signal to a plurality of sub-frames, a color conversion function which converts a video signal of three primary colors to a video signal of four or more colors including the three primary colors and a compound color, and a gradation comparing function which compares a value representing a video signal of the three primary colors excluding the compound color from the video signal of the four or more colors, with a value representing a video signal of the compound color from the video signal of the four or more colors; and a sub-frame converting part which converts, the video signal converted by the video signal converting part, to a signal having a plurality of different gradations whose average luminance value becomes equivalent to luminance of the video signal converted by the color converting part, and takes each of the plurality of gradations as each of gradations of the plurality of sub-frames, wherein the video signal converting part comprises: wherein the color conversion function comprises: