| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high quality LCD display which has public mode and private mode capability, in which the public mode has a substantially unaltered display performance (brightness, contrast, resolution etc), and the private mode has a strong privacy effect with minimal degradation to the on-axis image quality. <P>SOLUTION: A display device comprises a display controller 1 that determines a signal voltage to be applied to a liquid crystal display panel 2 for each image element in dependence upon an image data value 7 and a secondary data value 8 for the element, having a predetermined mapping between the image data value and the signal voltage. The secondary data values 8 vary across the whole image to introduce luminance variations as a result of the mapping. The panel 2 has a non-linear off axis luminance to on-axis luminance relationship, so that at least some of the luminance variations introduced off-axis do not balance locally through spatial averaging to an off axis viewer 4. <P>COPYRIGHT: (C)2013,JPO&INPIT |
