VIEWING ANGLE CONTROL ELEMENT AND IMAGE DISPLAY DEVICE USING SAME

摘要

PROBLEM TO BE SOLVED: To prevent lowering of picture quality caused by lowering of luminance of an image display element in a wide viewing angle display time while realizing both wide viewing angle display and narrow viewing angle display. SOLUTION: Because the viewing angle control element is provided with a light transmitting region 23 placed opposite to a pixel and having a transmittance T1 and a light shielding region 24 which switches between a transmittance T2 and a transmittance T3 being lower than T1 and T2 in accordance with a signal from the outside, the viewing angle control element does not widen the viewing angle by displaying with its primary luminance or luminance close to it in the narrow viewing angle display time and displaying via diffusion etc. in the wide viewing angle display time, but displays with its primary luminance or luminance close to it in the wide viewing angle display time and narrows the viewing angle via transmission suppression in the narrow viewing angle display time. COPYRIGHT: (C)2005,JPO&NCIPI