DUAL DISPLAY DEVICE

摘要

The invention relates to a dual display device (DD2) for displaying an input image (I) . The dual display device comprises a first display (Dl) and a second display (D2) . The first display is arranged for modulating an image from the second display. The dual display device further comprises a processor (Pr2) which comprises an image splitter (Sp) which splits the input image into an illumination image (Ii) and a reflection image (Ir) according to a retinex algorithm. The reflection image is displayed on the first display and the illumination image is displayed on the second display. Due to the series arrangement of the two displays the input image I is substantially recreated. The illumination image typically is a spatially low-resolution image derived from the input image. A benefit when using the illumination image at the second display is that the smoothed light intensity values of the illumination image lead to a lower average light intensity and thus to a lower power consumption compared to the prior art solution. Additional benefits when using the retinex algorithm for splitting the images are that parallax errors in dual display devices are reduced and that an improved usage of the dynamic range of the dual display device is obtained.