Method and apparatus for driving a display device with variable reference driving signals

摘要

A method and an apparatus capable of increasing the video depths depending on the video content of each line in order to provide a maximum of color gradation for each given scene shall be proposed. For this purpose there is disclosed an apparatus for driving a display device including input means for receiving a digital value as video level for each pixel or cell of a line of the display device, reference signaling means for providing at least one reference driving signal and driving means for generating a driving signal on the basis of the digital value and the at least one reference driving signal. The apparatus further includes adjusting means for adjusting the at least one reference driving signal in dependence of the digital values of at least a part of the line.

主权项

1. Method for driving a display device with at least one variable reference driving signal for displaying video level with variable video depth, comprising:
providing a digital value as video level for each pixel or cell of a line of said display device, providing at least one reference driving signal and generating a driving signal on the basis of said digital value and said at least one reference driving signal, adjusting said at least one reference driving signal dependent on a change of digital values of video levels of at least a part of said line representing a range of video levels by a transformation of said range of video levels of said line to a maximum number of available video levels for displaying video levels with variable video depth to perform a picture line-dependent alteration of a number of gradations by adjusting said at least one reference driving signal to the video levels in said at least part of said line and a number of video levels corresponding to said range of video levels for displaying video level with variable video depth and original luminance on the display device.