A method of reducing number of pixels on display device for super-multiview display

摘要

Super multi-view display provides smooth motion parallax without special glasses, and it is expected that the observer is free from the visual fatigue caused by the accommodation-vergence conflict. However, there is a problem that a huge number of pixels are required on a display device such as liquid crystal display panel because high-density rays are required for good quality images and each ray needs corresponding pixel. In this paper, we propose a new three-dimensional display based on lenticular method to reduce the required number of pixels. The rays are shot out to only around observer's pupils. To do this, the lenticular lens of which viewing zone angle is narrowed is used and the lenticular lens is illuminated by parallel light made by cylindrical lenses and LEDs to suppress sidelobes. The direction of the parallel light is changed to follow the observer's eye. We designed the optics system and confirmed the availability of the proposed method by computer simulation. Moreover, we constructed a prototype display and demonstrated. As a result, the parallax pitch and the viewing zone nearly equaled to designed values when the display was observed from the front, but these values were increased with the increasing viewing angle. The result of analysis, the reason why the parallax pitch and the viewing zone were expanded is thought as the curvature of field of the lenticular lens.