Computer modeling of LED light pipe systems for uniform display illumination

John Felix Van Derlofske

doi:10.1117/12.450035

5 December 2001 Computer modeling of LED light pipe systems for uniform display illumination

John Felix Van Derlofske

Proceedings Volume 4445, Solid State Lighting and Displays; (2001) https://doi.org/10.1117/12.450035
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Computer modeling of distributive light pipe systems using light emitting diode (LED) sources to produce uniform illumination for liquid crystal displays (LCDs) is presented. Due to their small size, lower power consumption, and lower heat generation, LEDs are a natural source choice for display illumination. However, to be useful in display applications, LEDs must be made to produce uniform illumination over the display area. The conversion of an LED's output flux distribution to one that is uniform over a given area can be accomplished with plastic, injection-molded light pipes. Illustrative examples of LED light pipe display systems are presented. These systems compare output coupling surface geometry for two LED input coupling scenarios; direct and indirect input coupling. Computer modeling via commercial software packages is used to optimize and analyze system designs. It is critical in these simulations to have accurate source models. Therefore close attention is paid to the LED source model. The final simulation results are presented and uniformity and total light output is compared. The implications of these results for display applications are discussed.

Citation Download Citation

John Felix Van Derlofske "Computer modeling of LED light pipe systems for uniform display illumination", Proc. SPIE 4445, Solid State Lighting and Displays, (5 December 2001); https://doi.org/10.1117/12.450035

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