Generation of diffuser dot patterns for light guides using fuzzy scheme strategy

Heng Zhao; Suping Fang; Qing Yang; Bo Shang

doi:10.1117/1.3269688

1 December 2009 Generation of diffuser dot patterns for light guides using fuzzy scheme strategy

Heng Zhao, Suping Fang, Qing Yang, Bo Shang

Author Affiliations +

Optical Engineering, Vol. 48, Issue 12, 124001 (December 2009). https://doi.org/10.1117/1.3269688

Abstract

We propose a fuzzy scheme strategy for the generation of the diffuser dot patterns in the light guide of an edge-lit backlight. The fuzzy scheme strategy is based on fuzzy logic and rules, which are closely related to the physical luminance properties of the light guide. During the process of generating diffuser dot patterns, two inputs are the dot radius and the distance from dots to a light source, and one output is the luminance of the light guide panel. This strategy converts the linguistic strategy based on expert knowledge the optimal dot-generation strategy. Furthermore, this study includes the discussion of fuzzification and defuzzification strategies, the derivation of fuzzy logic rules, and the analysis of fuzzy reasoning mechanisms. Experiment results reveal that the proposed strategy can achieve an even luminance condition by establishing dot patterns. Compared to conventional methods, the fuzzy scheme strategy has two advantages. It effectively integrates the dot generation scheme into the subsequent optical design phase to make dot patterns more efficient and easy to control. Moreover, optimized dot patterns realize sufficient luminance uniformity.

©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Heng Zhao, Suping Fang, Qing Yang, and Bo Shang "Generation of diffuser dot patterns for light guides using fuzzy scheme strategy," Optical Engineering 48(12), 124001 (1 December 2009). https://doi.org/10.1117/1.3269688

Published: 1 December 2009

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