Uniform LED illuminator for miniature displays

Vladimir Medvedev; David G. Pelka; William A. Parkyn

doi:10.1117/12.327957

20 October 1998 Uniform LED illuminator for miniature displays

Vladimir Medvedev, David G. Pelka, William A. Parkyn

Proceedings Volume 3428, Illumination and Source Engineering; (1998) https://doi.org/10.1117/12.327957
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

The Total Internally Reflecting (TIR) lens is a faceted structure composed of prismatic elements that collect a source's light over a much larger angular range than a conventional Fresnel lens. It has been successfully applied to the efficient collimation of light from incandescent and fluorescent lamps, and from light-emitting diodes (LEDs). A novel LED-powered collimating backlight is presented here, for uniformly illuminating 0.25'-diagonal miniature liquid- crystal displays, which are a burgeoning market for pagers, cellular phones, digital cameras, camcorders, and virtual- reality displays. The backlight lens consists of a central dual-asphere refracting section and an outer TIR section, properly curved with a curved exit face.

Citation Download Citation

Vladimir Medvedev, David G. Pelka, and William A. Parkyn "Uniform LED illuminator for miniature displays", Proc. SPIE 3428, Illumination and Source Engineering, (20 October 1998); https://doi.org/10.1117/12.327957

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