Yasuo Funazou

Multiview image integration system for glassless 3D display

We have developed a multi-view image integration system, which combines seven parallax video images into a single video image so that it fits the parallax barrier. The apertures of this barrier are not stripes but tiny rectangles that are arranged in the shape of stairs. Commodity hardware is used to satisfy a specification which requires that the resolution of each parallax video image is SXGA(1645×800 pixel resolution), the resulting integrated image is QUXGA-W(3840×2400 pixel resolution), and the frame rate is fifteen frames per second. The point is that the system can provide with QUXGA-W video image, which corresponds to 27MB, at 15fps, that is about 2Gbps. Using the integration system and a Liquid Crystal Display with the parallax barrier, we can enjoy an immersive live video image which supports seven viewpoints without special glasses. In addition, since the system can superimpose the CG images of the relevant seven viewpoints into the live video images, it is possible to communicate with remote users by sharing a virtual object.

15.1: A New LC Rear‐Projection Display Based on the “Color‐Grating Method”

We have developed a rear-projection display with a novel color separation system, so called the Color Grating Method, comprised of the diffraction grating and the single-LC panel. This method realizes the higher brightness and well chromaticity compared with the conventional optical engine using single-LC with color filter. Further, we developed a new polarization converter system, using a prism array that consists of several small prisms. A prism array combines both orthogonal polarized light, therefore our optical engine can efficiently utilize a luminosity of a light source. The LC rear-projection display based on these technologies realized the lower costs and light weight, a slim body and good performance.

P‐160: A Quiet LCD Projector with a Novel Cooling System Using Ionized Airflow

We have developed the quiet LCD projector using the novel silent cooling system using ionized airflow. In the LCD projector, there are two big noise sources. One is the exhaust fan for the lamp, and the other is the intake blower for the LCD panels. To reduce the noise of exhaust fan for the lamp, we adopt the novel cooling system, which uses the negative corona discharge with needle electrodes and mesh electrodes. To reduce the noise of the intake blower for the LCD panels, we adopt the wire grid polarizer near the lamp. The wire grid polarizer reduces the amount of airflow for the LCD panels and the polarizers, and realized the lower voltage of intake blower for the LCD. Using the following methods, the noise of the prototype is 26dB.

Development of a new LC rear-projection display with an aspherical mirror projection system

We have developed a new projection system that consists of an aspherical mirror projection system. This system realizes the small depth that cannot be achieved with the conventional rear projection lens. Furthermore, we have developed a new screen that realizes high brightness, good uniformity within the whole image area, a wide viewing angle, and reduction of the ghost image by obtaining the ideal conditions between each blaze angle of the Fresnel screen and the projected rays onto the screen.