[KSCI] Korea Science Citation Index Service

Design and Analysis of Diffractive Grating Imprinted Light-guide Plate for LCD Illumination

Choi, Hwan-Young (MEMS Lab., Samsung Advanced Institute of Technology)
Park, Young-Pil (Department of Mechanical Engineering, Yonsei University)

Publication Information

Journal of Information Display / v.5, no.1, 2004 , pp. 7-15 More about this Journal

Abstract

A highly simplified backlight unit mainly composed of diffractive grating in sub-micron order imprinted light-guide plate (LGP) is proposed for edge-lit backlight unit. Optical characteristics of the imprinted LGP are examined by RCWA and the performance is verified through Monte Carlo simulation. Results show that the diffraction efficiency, luminous flux and its uniformity over the area are significantly affected by the angle of incident ray. Consequently couples of design considerations are additionally proposed to enhance luminous flux. In terms of peak luminance and out-coupling luminous flux, the experimental results are agreed well with the performance simulation. Finally, compared with optical characteristics of conventional backlight unit, we could conclude that the proposed simplified backlight unit made of diffractive grating imprinted light-guide plate is a good substitute for the conventional backlight unit.

Keywords

backlight; light-guide plate; diffractive grating; luminance enhancement; out-coupling flux; illumination; liquid crystal display;

Citations & Related Records

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