Tandem Light-Guides With Micro-Line-Prism Arrays for Field-Sequential-Color Scanning Backlight Module

Author

Tien, Chung-Hao ; Lu, Yen-Hsing ; Yao, Yuan-Jung

Author_Institution

Dept. of Photonics & Display Inst., Nat. Chiao Tung Univ., Hsinchu

Volume

4

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

147

Lastpage

152

Abstract

An optically partitioned backlight system consisting of tandem wedge-shaped light-guides (LGs) with micro-line-prism arrays was developed for scanning field-sequential-color (FSC) liquid crystal display (LCD) in large size. The unit of wedge-shaped LG combined with a light-emitting diode (LED) light-bar was designed and fabricated to collimate the extraction light within a narrow angular extent. Based on the edge lighting approach, the volume of backlight system can be reduced down to 25 mm without sacrifice of the optical behavior. As a result, 2750 nits average luminance subject to 50% duty cycle and 83% uniformity can be achieved. The leakages into the consecutive adjacent blocks were well suppressed to 11.86%.

Keywords

light emitting diodes; liquid crystal displays; micro-optics; optical arrays; FSC; LCD; LED light-bar; edge lighting approach; field-sequential-color scanning backlight module; light-emitting diode; liquid crystal display; micro-line-prism arrays; optically partitioned backlight system; scanning field-sequential-color; tandem wedge-shaped light-guides; Field-sequential-color (FSC) liquid crystal display (LCD); micro-line-prism arrays; scanning backlight; tandem light-guides (LGs);

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2008.917090

Filename

4476071