Dot-pattern design of a light guide in an edge-lit backlight using a regional partition approach

Jee-Gong Chang; Yu-Bin Fang

doi:10.1117/1.2721423

1 April 2007 Dot-pattern design of a light guide in an edge-lit backlight using a regional partition approach

Jee-Gong Chang, Yu-Bin Fang

Author Affiliations +

Optical Engineering, Vol. 46, Issue 4, 043002 (April 2007). https://doi.org/10.1117/1.2721423

Abstract

This paper employs a regional partition approach to establish the optimal distribution of the diffuser dots in the light guide of an edge-lit backlight. The proposed approach commences by dividing the light guide into a number of partitions and assigning an equal radius to every dot. An iterative optimization procedure is then performed in which the illuminance in each partition is calculated and the dot radius in each partition progressively adjusted until uniform luminance is obtained over the entire light-guide surface. To simplify the geometry construction process and improve the efficiency of the optimization procedure, a simple optical model is proposed for the diffuser dots and the bare surface of the light guide, and an analytical procedure is implemented to take account of the diffuser-film and brightness-enhancement-film effects. The simulation results confirm the ability of the proposed approach to accurately reflect the fine regulation of the dot radius required to obtain uniform luminance for typical light-emitting diode configurations used in practical backlight modules.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Jee-Gong Chang and Yu-Bin Fang "Dot-pattern design of a light guide in an edge-lit backlight using a regional partition approach," Optical Engineering 46(4), 043002 (1 April 2007). https://doi.org/10.1117/1.2721423

Published: 1 April 2007

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