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44.2: A Novel Direct‐LED‐Backlight Unit Using Grooved Hexagonal Light‐Guide Plate
Author(s) -
Lu YenHsing,
Tien ChungHao
Publication year - 2006
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 - 10.1889/1.2433280
Subject(s) - backlight , materials science , light emitting diode , optics , hexagonal crystal system , light guide , groove (engineering) , cold cathode , optoelectronics , fluorescent lamp , cathode , liquid crystal display , light source , electrical engineering , engineering , physics , chemistry , metallurgy , crystallography
A novel large size backlight unit (BLU) which consists of modulized hexagonal light guide plate (LGP) based on micro‐groove structures of polymethyl methacrylate (PMMA) material with a side emitting light emitting diode (LED) was developed. The grooved features expand the angular distribution from LED toward the exiting surface of the LGP. Therefore, the BLU with the optimum based angle of grooves can be thinner in volume, and can reduce the half number of LEDs (from 96 to 42) to yield the competitive uniformity of 81% compared with those of commercial Cold Cathode Fluorescent Lamp (CCFL) backlight and conventional LED backlight.