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18.1: Adaptive Dimming Technique with Optically Isolated Lamp Groups
Author(s) -
Shiga T.,
Kuwahara S.,
Takeo N.,
Mikoshiba S.
Publication year - 2005
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 - 10.1889/1.2036617
Subject(s) - backlight , optics , ranging , light guide , computer science , power (physics) , sample (material) , materials science , physics , optoelectronics , light source , telecommunications , liquid crystal display , quantum mechanics , thermodynamics
Abstract An adaptive dimming technique is examined for an LCTV in which horizontally aligned eight parallel backlight lamps are provided. The lamps are optically isolated one another and can be dimmed independently depending on the TV signal. The optical isolations are found to be especially effective to relatively dark pictures having few bright spots. The backlight power for the sample pictures with APL ranging from 0.8% to 40% can be reduced to 20% − 65% by adopting the dimming technique.