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19.3: Optimized LCD Backlight for Outdoor and High Brightness Applications
Author(s) -
Blanchard Randall
Publication year - 2001
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1831854
Subject(s) - backlight , liquid crystal display , brightness , luminance , optics , fluorescent lamp , computer graphics (images) , materials science , computer science , optoelectronics , physics
A high intensity backlight for use with large LCD panels has been developed. It supports the performance and environmental requirements of a display intended for outdoor applications. It uses an inductively coupled electrodeless fluorescent lamp. The backlight lamp has a lifetime of 100,000 hours with instant starting at −40°C and a stable light output over a 70°C temperature span. The backlight design has been optimized for luminance uniformity and efficiency within a display depth of 6″. A wide format 22″ LCD display with this backlight technology provides an image brightness of 1,200 cd/m 2 from a single 150‐watt lamp.