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LP‐2: High Performance LCD Backlighting using High Intensity Red, Green and Blue Light Emitting Diodes
Author(s) -
Harbers Gerard,
Hoelen Christoph
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 - 10.1889/1.1831960
Subject(s) - backlight , gamut , liquid crystal display , rgb color model , brightness , light emitting diode , materials science , optics , optoelectronics , diode , cathode ray tube , cold cathode , computer science , cathode , physics , computer vision , electrical engineering , engineering
By using red, green, and blue (RGB) light emitting diodes (LEDs) instead of cold cathode fluorescent lamps in edge lit LCD backlights brightness and color performance (gamut) of LCD displays can be improved considerably. However: the design of an RGB‐LED backlight and electronic control need special attention: the colors of the separate LEDs need to be mixed well to obtain a good spatial color uniformity while a good balance between the red, green and blue levels has to be maintained to stabilize the white point. Additional features of an RGB‐LED backlight solution are: dynamic white point control (tune color point of backlight to LCD and/or displayed material), large dimming range, long lifetime, ruggedness, and the absence of mercury.