P‐109: Lens Array Design for Collimated LED Backlight in Helmet‐Mounted Display. Issue 1 (May 2017)

• Record Type: Journal Article
• Authors: Qibin, Feng; Qigong, Li; Xiaojun, Zhang; Dejun, Li; Zuchuan, Shi; Guoqiang, Lv
• Is Part Of: Digest of technical papers. Volume 48:Issue 1(2017)
• Page Start: 1670
• Page End: 1672
• Publication Date: 2017-05
• Subjects: LED backlight -- LCD -- lens array; Information display systems -- Congresses; 621.3815422
• DOI: 10.1002/sdtp.11972
• Languages: English
• ISSNs: 0097-966X

Abstract

Abstract : 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.