Edge-Lighting Light Guide Plate Based on Micro-Prism for Liquid Crystal Display

Author

Yan, Jin-Ren ; Wang, Qiong-Hua ; Li, Da-Hai ; Zhang, Jian-De

Author_Institution

Key Lab. of Fundamental Synthetic Vision Graphics & Image for Nat. Defense, Sichuan Univ., Chengdu, China

Volume

5

Issue

9

fYear

2009

Firstpage

355

Lastpage

357

Abstract

We designed an edge-lighting light guide plate (LGP) based on a micro-prism structure for liquid crystal display. Its top and bottom surfaces have micro-prisms, and a layer of high reflection film is coated on the bottom surface. The principle of the LGP was analyzed. The optical simulation tool ASAP was used to calculate the apex angle and height of the micro-prism on the top of the LGP, the apex angle of the micro-prism on the bottom of the LGP and the emitting angle dependent luminous flux of the LGP. By adjusting the width of micro-prisms on the bottom, the LGP achieved uniform luminance. A 12-in LGP based on a micro-prism structure as an example was designed. The results proved that the LGP based on a micro-prism structure is thin and simple with uniform luminance and high efficiency.

Keywords

liquid crystal displays; micro-optics; optical design techniques; optical prisms; apex angle; edge-lighting light guide plate; liquid crystal display; micro-prism structure; Costs; Light sources; Lighting; Liquid crystal displays; Mie scattering; Optical films; Optical polymers; Optical reflection; Optical scattering; Optical sensors; Light guide plate; liquid crystal display (LCD); micro-prism;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2009.2024625

Filename

5196835