High-efficiency metal halide lighting systems for compact LCD projectors

Charles N. Stewart; Douglas M. Rutan; Daniel J. Savage

doi:10.1117/12.273883

8 May 1997 High-efficiency metal halide lighting systems for compact LCD projectors

Charles N. Stewart, Douglas M. Rutan, Daniel J. Savage

Proceedings Volume 3013, Projection Displays III; (1997) https://doi.org/10.1117/12.273883
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

Abstract

Compact LCD projectors require a high efficiency light source that has the smallest possible spatial extent. The objective of the lamp design must be to preserve the system etendue to ensure excellent screen illuminance. We present the results of the development of projection lighting systems that produce 1,500 to 3,000 lumens, have luminous efficacious of >= 1m/W and source sizes of <EQ 1.2 mm. Results of statistically designed experiments on the lamp design parameters and design parameters of the lamp/ballast systems essential for rapid start, restart, and long life will be discussed. These design studies result in compact efficient systems. 3D luminance results - both model and experiment - will be discussed. The result of our studies is a better understanding of the factors impacting long life, high efficiency, metal halide lamps with very small source sizes. We have identified a series of designs for lamp/ballast systems that give the user an option of performance sets. We will describe recent work on the design and characterization of a long life 50 Watt, 1.2 m arc gap metal halide lighting system that produces 3,200 lumens. A theoretical characterization of the optical efficiency of an arbitrary projection optical system through discussion of the arc efficiency and the system etendue will be presented.

Citation Download Citation

Charles N. Stewart, Douglas M. Rutan, and Daniel J. Savage "High-efficiency metal halide lighting systems for compact LCD projectors", Proc. SPIE 3013, Projection Displays III, (8 May 1997); https://doi.org/10.1117/12.273883

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available