Overdrive device

摘要

An overdrive device includes a training unit, an analysis unit and a Contrast adjustment unit. The training unit establishes a luminance difference look-up table (LUT) having an R2 number of luminance differences. Each of the R2 number of luminance differences represents a luminance difference between a measured display luminance value and a target luminance value of a display device when each of first and second viewing angle images correspond to any value of a grayscale range R. With respect to first and second viewing angle input image data, for pixel data therein corresponding to a same pixel position, the analysis unit looks up the luminance difference LUT to obtain a looked-up luminance difference, and accordingly calculates a luminance difference index. The contrast adjustment unit partially adjusts the grayscale of the second viewing angle image according to the luminance value index to obtain headroom for an overdrive operation.

主权项

1. An overdrive device, applied to an active shutter three-dimensional (3D) system, for respectively display a first viewing angle image and a second viewing angle image in first and second viewing angle display periods which are adjacent and sequentially triggered, the first and second viewing angle images having a grayscale range R, R being a natural number greater than 1, the overdrive device comprising:
a training unit, for establishing a luminance difference look-up table (LUT) having an R2 number of luminance differences, each of the R2 number of luminance differences representing a luminance difference between a measured display luminance value and a target luminance value of the display device when the first viewing angle image corresponds to a value in the grayscale range R and the second viewing angle image corresponds to a value in the grayscale range R; an analysis unit, for sequentially receiving first viewing angle input image data and second viewing angle input image data, looking up the luminance difference LUT according to first pixel data and second pixel data corresponding to a same pixel position in the first viewing angle input image data and the second viewing angle input image data to correspondingly obtain a looked-up luminance difference, and generating a luminance difference index for each pixel position according to the looked-up luminance difference; a contrast adjustment unit, for performing a conversion in response to the luminance difference index corresponding to each pixel position to obtain a luminance difference adjustment gain, and accordingly adjusting a grayscale of the second pixel data to obtain corrected pixel data; and an overdrive unit, for providing an overdrive voltage for driving the display device according to the corrected pixel data.