| 摘要 |
PROBLEM TO BE SOLVED: To provide a visual field-controlled liquid crystal display device capable of being obtained inexpensively. SOLUTION: A surface light source 8 for selectively radiating first illumination light having such intensity distribution that the intensity of front light emitted in a direction of a normal of a liquid crystal display element 1 is higher than that of oblique light emitted at angles to the normal in one direction and its opposite direction, a second illumination light having such intensity distribution that the intensity of the oblique light is higher than that of the front light, is disposed on the side opposite to the observation side of the liquid crystal display element 1, and a display image data signal corresponding to a video signal and a selected data signal obtained by selecting one of the display image data signal and a fixed image data signal corresponding to a fixed image of a preliminarily registered pattern are alternately applied to each pixel of the liquid crystal display element 1 by a driving means 22, and the first illumination light is caused to be radiated from the surface light source 8 synchronously with application of the display image data signal, and the second illumination light is caused to be radiated from the surface light source 8 synchronously with application of the selected data signal. COPYRIGHT: (C)2007,JPO&INPIT
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