Reducing Speckle in Laser Displays with Moving Screen System
Muneharu Kuwata,Tomohiro Sasagawa,Kuniko Kojima,Atsushi Michimori,Hiroaki Sugiura,Yoshihito Hirano,Endo Takao +6 more
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TLDR
The principle and the basic experimental results of a method to reduce speckle in laser displays with a moving screen system were described and it reducedSpeckle on laser projection displays.Abstract:
The laser display can be a very high quality one because of its excellent properties such as a wide color gamut and low power consumption. It is essential, however, to reduce the speckle related to the essence of lasers. We describe the principle and the basic experimental results of a method to reduce speckle in laser displays with a moving screen system. The relationship among the screen gain, radius of screen rotation, linear velocity and speckle was quantitatively evaluated and it reduced speckle on laser projection displays.read more
Citations
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Efficient speckle reduction for a laser illuminating on a micro-vibrated paper screen
TL;DR: An efficient speckle reduction method for laser illumination using a micro-vibrated paper screen along the projection direction is demonstrated, suitable for compact and portable laser illumination equipment, image display, signal sensing devices, and so forth.
Journal ArticleDOI
Investigation of speckle suppression beyond human eye sensitivity by using a passive multimode fiber and a multimode fiber bundle.
A. S. Lapchuk,Zichun Le,Yanyu Guo,Yanxin Dai,Zongshen Liu,Qiyong Xu,Zhiyi Lu,A. A. Kryuchyn,Ivan V. Gorbov +8 more
TL;DR: The results shown that the efficiency of speckle suppression was limited because only the radial direction of the objective lens aperture was used.
Journal ArticleDOI
Understanding the exposure-time effect on speckle contrast measurement for laser projection with rotating diffuser
Koji Suzuki,Shigeo Kubota +1 more
TL;DR: In this article, a high-speed measurement method was developed to measure speckle contrast over a wide range of exposure time without adjusting the brightness of laser displays using an intentionally slow-rotating diffused plate.
Journal ArticleDOI
Reliability of prototype microcapsule diffuser for speckle noise reduction in laser displays
Satoru Okagaki,Kondo Jun,Kuniko Kojima,Yuzo Nakano,Akihisa Miyata,Kazuki Kubo,Yasuhiro Yoshida +6 more
TL;DR: In this paper, a microcapsule diffuser of the transparent type is proposed to reduce the speckle noise generated on a laser display, which contains light diffusion particles that are electrically charged.
Journal ArticleDOI
Theory of speckle suppression in a laser projector based on a long multimode fiber
TL;DR: In this paper, the authors analyzed the speckle suppression efficiency of a multimode fiber in a practical laser projector, and developed a theoretical model to estimate the suppression coefficient as a linear function of the square root of the ratio of the numerical aperture of the objective lens and the eye.
References
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Journal ArticleDOI
A practical laser projector with new illumination optics for reduction of speckle noise
TL;DR: In this paper, the authors developed illumination optics for image projection systems, which realized uniform illumination and suppression of speckle and diffraction noises by using a diffuser and integrator optics.
Journal ArticleDOI
A 65-in. slim (255-mm depth) laser TV with wide-angle projection optical system
Muneharu Kuwata,Hiroaki Sugiura,Tomohiro Sasagawa,Atsushi Michimori,Eiich Toide,Takayuki Yanagisawa,Syuhei Yamamoto,Yoshihito Hirano,Masahiro Usui,Shigenori Teramatsu,Jun Someya +10 more
TL;DR: In this article, a high-definition laser TV that employs a newly developed laser light source and a super-wide-angle projection optical system has been developed, which achieved an extremely wide color gamut, and, in addition, a compact optical engine was optimized to the laser source and contributed to the achievement of the stylish design of a large screen of 65 in.
Journal ArticleDOI
63.5L: Late-News Paper: Planar-Waveguide Green Laser for Laser TV
Yoshihito Hirano,Takayuki Yanagisawa,Syuhei Yamamoto,Yasuharu Koyata,Makoto Okano,Tsuneo Hamaguchi,Akira Nakamura,Tetsuya Yagi,Hiroaki Sugiura +8 more
TL;DR: In this article, a planar-waveguide configuration was used to improve the performance of a green laser light source for a light source of laser TV, which achieved a green peak power of 11.4-W with the corresponding electrical efficiency of 21% with temperature insensitive features.