US Patent 11232764 Display driver and display device

A first latch retrieves a pixel data piece for each one horizontal scanning period of a video data signal and holds the pixel data piece as a first pixel data piece. A second latch retrieves the first pixel data piece from the first latch at a timing when the retrieval by the first latch is completed and holds the first pixel data piece as a second pixel data piece. An interpolation data generating unit obtains the first pixel data piece and the second pixel data piece and generates an interpolation data piece. A third latch alternately performs a retrieval of the second pixel data piece and a retrieval of the interpolation data piece, and sequentially outputs the retrieved data piece as a third pixel data piece. A gradation voltage output unit outputs the gradation voltage signal based on the third pixel data piece.