Ryuhei Amano

High‐efficiency optical system for ultra‐short‐throw‐distance projector based on multi‐laser light source

— A novel laser-light-source projector having the three outstanding features of high brightness, ultra-short throw distance, and high color reproduction has been developed.These features have recently come to be required in the high-end projector market. The technologies for the laser-light-source projectors fully utilize the advantages of lasers, such as high luminance, small etendue, and high color purity. By integrating a triple-rod illumination system with a multi-laser light source and an ultra-wide-angle projection system, the developed high-efficiency optical system has achieved a brightness of 7000 lm and a throw ratio of 0.28 with an image size of 100–150 in. Another new technology, laser color processing (LCP), has offered vivid color reproduction which has a color gamut that is up to 180% wider than the BT.709 standard without appearing unnaturally colored. Furthermore, a speckle suppression effect produced by the multi-laser light source has been demonstrated. In this paper, an overview of these newly developed technologies that are used in the novel laser-light-source projector is presented, and solutions to the issues of speckle noise and safety are presented.

Ultra-short Throw Distance Front Projector with Mirror-Lens Hybrid Projection Optical System

We have developed an ultra-short throw distance front projector with a newly developed mirror-lens hybrid projection optical system, which is composed of a projection lens and a concave aspherical mirror. This projector using the novel projection optical system has the worlds shortest projection distance of 0.5 m at 78Q Our new LP-XL50 front projector has already been released in the market.

65.3: Distinguished Paper: High Efficiency Optical System for Ultra-Short Throw Distance Projector Based on Multi-laser Light Source

We have developed a high-efficiency optical system that uses multiple lasers as a light source. This optical system enables us to produce a novel laser projector with a high brightness and an ultra-short throw distance. By utilizing the advantages of a laser, we have achieved a brightness of 7,000 lm and a throw ratio of 0.28 with an image size of 100–150 inches.