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P‐109: Lens Array Design for Collimated LED Backlight in Helmet‐Mounted Display
Author(s) -
Qibin Feng,
Qigong Li,
Xiaojun Zhang,
Dejun Li,
Zuchuan Shi,
Guoqiang Lv
Publication year - 2017
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 - 10.1002/sdtp.11972
Subject(s) - backlight , collimated light , diffuser (optics) , optics , planar , lens (geology) , full width at half maximum , luminance , enhanced data rates for gsm evolution , computer science , liquid crystal display , physics , light source , computer graphics (images) , computer vision , laser
It is better for LED backlight in helmet‐mounted display to provide collimated light to achieve high efficiency. The paper presents a simple design method for planar lightsource. The edge light theory is exploited to make the planar lightsource become a virtual spot lightsource. The practical test results show that the central luminance of the backlight with the lens array has 320% increase than the backlight without the lens array. FWHM decreases from 39° with 2 diffuser fdms to 12° with 1 diffuser film and the lens array.