Journal ArticleDOI
Illumination system with compound parabolic retro-reflector for single LCOS panel projection display
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TLDR
In this paper, a new illumination system with ultra high performance (UHP) lamp is proposed for projection display, where a polarization converter system was used to increase the light efficiency of the projection display system.Abstract:
In this paper, a new illumination system with ultra high performance (UHP) lamp is proposed for projection display. Parabolic reflector (PR) and compound parabolic retro-reflector (CPR) were jointly used to collect and collimate the light generated from UHP lamp. A polarization converter system (PCS) was used to increase the light efficiency of the projection display system. A beam transformer between PCS and 2f imaging systems was directly used to make the illumination meet the requirement of projection display system. With the consideration of the loss of reflection, the light efficiency in this projection display system was estimated to be 15.6%.read more
Citations
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Journal ArticleDOI
Design of an elliptic spot illumination system in LED-based color filter-liquid-crystal-on-silicon pico projectors for mobile embedded projection.
Enguo Chen,Feihong Yu +1 more
TL;DR: An elliptic spot illumination system for a color filter-liquid-crystal-on-silicon (CF-LCoS) pico projector employing a specifically designed free-form lens and a cylindrical lens to improve on previous designs in terms of optical efficiency while yielding an ultracompact and low-cost optical architecture is presented.
Design and optimization of tapered light pipes
TL;DR: In this article, a lensed tapered light pipe is described that change the area and angle of light with minimal loss of brightness and provide a very uniform output intensity profile at the output.
Journal ArticleDOI
Synchronized parameter optimization of the double freeform lenses illumination system used for the CF-LCoS pico-projectors
Enguo Chen,Peng Liu,Feihong Yu +2 more
TL;DR: Analytical result indicates that the design method represents substantial improvement and practical significance over traditional CF-LCoS projection system, which could offer outstanding performance with both portability and low cost.
Journal ArticleDOI
The set of all possible pair of stigmatic mirrors
TL;DR: In this article , closed-form equations that express a pair of mirrors such that it forms a stigmatic optical system are presented, which are general enough to express the set of all possible pairs of stigmatic mirrors.
Etendue efficient illuminator with a retro-reflecting aperture
TL;DR: In this paper, the etendue efficient illuminator having retro-reflecting aperture with a slit is proposed, which allows to increase light efficiency of the projection system which has an et endue much smaller than the arc lamp used typically as the light source.
References
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Proceedings ArticleDOI
Design and optimization of tapered light pipes
TL;DR: A lensed tapered light pipe is described that change the area and angle of light with minimal loss of brightness and provide a very uniform output intensity profile at the output.
Proceedings ArticleDOI
Beam shape transforming devices in high-efficiency projection systems
TL;DR: In this article, the trade-offs between uniformity, efficiency, etendue, and compactness of beam-shape transformers are investigated in high-efficiency projectors to match round source beams to rectangular LCD targets.
LED projection displays
TL;DR: The prototype of a rear projection system has been developed by using red, green and blue (RGB) LEDs and three LCD panels and the projection engine was very small comparing to the original engine which uses an arc source.
Design and optimization of tapered light pipes
TL;DR: In this article, a lensed tapered light pipe is described that change the area and angle of light with minimal loss of brightness and provide a very uniform output intensity profile at the output.
Proceedings ArticleDOI
Metal halide lighting systems and optics for high-efficiency compact LCD projectors
TL;DR: In this article, the authors provide a theoretical framework for understanding these aberrations and the magnitude of their effect, and also present results showing the efficiency, uniformity, and other performance gains which are possible when these light beam distortions are corrected.
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