Dual paraboloid reflector technology development and the commercialization for projection display

Kenneth Li

doi:10.1117/12.717482

5 February 2007 Dual paraboloid reflector technology development and the commercialization for projection display

Kenneth Li

Proceedings Volume 6489, Projection Displays XII; 648902 (2007) https://doi.org/10.1117/12.717482
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

One major issue in microdisplay-based projection television has always been the need for more light. Without sufficient amount of light, the screen gain is usually the final parameter that is adjusted to produce acceptable on-axis brightness. As a result, one major disadvantage of rear projection television (RPTV) is narrow viewing angle when compared with other display technologies. Traditional reflector systems, including elliptical and parabolic reflectors, perform well in most cases, but are inefficient for smaller etendue values corresponding to smaller image panels. The common remedy is to make lamps with shorter and shorter arcs to increase the coupling efficiency, but the corresponding lifetime of the lamps are reduced and most of the time, these short arc lamps can only operate at low power, thus limiting the total output of the illuminating system. The Dual Paraboloid reflector (DPR) technology allows the use of higher power lamps while maintaining long life, thus allows wider viewing angles to be achieved. In addition, low power lamps when used with the DPR system allows such a long life operation that lamp replacement is not needed, allowing the RPTV to compete effectively with LCDTV and PDP systems. These advantages are also applicable to front projectors with long life lamps that lower ownership costs.

Citation Download Citation

Kenneth Li "Dual paraboloid reflector technology development and the commercialization for projection display", Proc. SPIE 6489, Projection Displays XII, 648902 (5 February 2007); https://doi.org/10.1117/12.717482

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