Abstract
Problem in the front-projection displays is that the screen contrast ratio decreases in bright ambient light. To overcome this problem, we have proposed a special screen, whose diffusing property shows typical top-hat characteristics. The screen can diffuse incident light from the projector in lower angle range to viewing angle range and can diffuse ambient light to angle range out of viewing. In this paper, we have optimized the incident angle range from the projector and the viewing angle range for typical ambient light, in order to practice these performances. Also, we have realized the special screen with the above mentioned diffusing property and have achieved high quality front-projection display with high contrast ratio, even in brightly lit room.
