P‐109: Lens Array Design for Collimated LED Backlight in Helmet‐Mounted Display

P‐109: Lens Array Design for Collimated LED Backlight in Helmet‐Mounted Display

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 r...

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Veröffentlicht in:SID International Symposium Digest of technical papers 2017-05, Vol.48 (1), p.1670-1672
Hauptverfasser: Qibin, Feng, Qigong, Li, Xiaojun, Zhang, Dejun, Li, Zuchuan, Shi, Guoqiang, Lv
Format: Artikel
Sprache:eng
Schlagworte:
Collimation
Defense industry
Diffusers
Efficiency
LCD
LED backlight
lens array
Lenses
Light emitting diodes
Luminance
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Zusammenfassung: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.
ISSN:0097-966X
2168-0159
DOI:10.1002/sdtp.11972