Analytical light source illuminance in liquid crystal projection TV

Kuang-Vu Chen; San-Ming Chen; Zu-Deh Hao

doi:10.1117/12.205912

7 April 1995 Analytical light source illuminance in liquid crystal projection TV

Kuang-Vu Chen, San-Ming Chen, Zu-Deh Hao

Proceedings Volume 2407, Projection Displays; (1995) https://doi.org/10.1117/12.205912
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

Illumination is one of the key factors of LCD projection TV. It is important to design a light source that provides uniform illuminance and high intensity light beams parallel to optical axis direction. There are various kinds of light sources that correspond to different light radiation distributions. It is necessary to use a back reflector in the light source system, to confine the light radiation into a solid angle and to conserve the highest illuminance efficiency. In this paper, we compare four different kinds of reflector curves that are simple Cartesian surface, compound Cartesian surface, multiple facet surface, and complex surface. The light source used in this work is a metal halide lamp. The lengths of lamp arc as well as the lamp tube shape are playing an important role in the design of the reflector curve for final illuminance performance. Our results provide a selection rule of reflector configurations toward a desired illumination distribution.

Citation Download Citation

Kuang-Vu Chen, San-Ming Chen, and Zu-Deh Hao "Analytical light source illuminance in liquid crystal projection TV", Proc. SPIE 2407, Projection Displays, (7 April 1995); https://doi.org/10.1117/12.205912

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