Patent ID: 8462180

Claim:
An apparatus for displaying an input picture of a sequence of input pictures with increased bit depth on a display device during a video frame made up of a number of N consecutive sub-frames, with N≧2, comprising an active matrix comprising a plurality of light emitting cells, encoding means for encoding the video data of each pixel of the input picture to be displayed and delivering a number of N k-bit sub-frame data, with k≧8, each sub-frame data being displayed during a sub-frame, and a driving unit for selecting row by row the cells of said active matrix and converting, sub-frame by sub-frame, the sub-frame data delivered by said encoding means into signals to be applied to selected cells of the matrix, wherein the driving unit further comprises: a sub-frame driving unit in communication with said encoding means; and a reference signaling unit in communication with said sub-frame driving unit and being configured to provide different reference signal sets used in a data driver which is in communication with said sub-frame driving unit for providing a change of the set of reference signals at each sub-frame of the video frame controlled by the sub-frame driving unit to display said input pictures with said encoding means converting said input pictures with increased bit depth into k-bit sub-frame data generating, with the sets of reference signals, the picture with increased bit depth so that at least one of the number of the N sub-frame data generated for a pixel is different from the video data of said pixel.