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Light trapping for outside laser-display light harvesting
Author(s): Yu Ping Zhang; Guanjun Wang; Kaian Wang; Wen Song; Liang Chen; Cheng Jiao; Dao Zhang; Jidong Yang; Yu Chen; Jianli Li
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Paper Abstract

Luminance is a key factor for outside displays because of background light interference. Many methods have been used to enhance the luminance of backlit display systems. The key to enhancing the luminance of a backlit system is to increase the light coupling between the light guided plate (LGP) and the light source. In this paper, we present an effective method to enhance light trapping and boost light harvesting by introducing cross-grooved textures on the side surface of the LGP. Elevated light coupling between the line laser and the LGP with a cross-grooved texture has been observed in both 3 mm and 4 mm thick LGPs, respectively. A light trapping mechanism has been proposed in which greater interaction surface area between the LGP and line laser source and an elongated light traveling channel contribute to overall light trapping. As a result, reduced reflection loss boosts light harvesting. A nearly 100% luminance efficiency enhancement has been achieved using this simple technique.

Paper Details

Date Published: 19 February 2018
PDF: 14 pages
Proc. SPIE 10556, Advances in Display Technologies VIII, 105560K (19 February 2018); doi: 10.1117/12.2286874
Show Author Affiliations
Yu Ping Zhang, The 55th Research Institute of China Electronics Technology Group Corp. (China)
Guanjun Wang, The 55th Research Institute of China Electronics Technology Group Corp. (China)
Kaian Wang, The 55th Research Institute of China Electronics Technology Group Corp. (China)
Wen Song, The 55th Research Institute of China Electronics Technology Group Corp. (China)
Liang Chen, The 55th Research Institute of China Electronics Technology Group Corp. (China)
Cheng Jiao, The 55th Research Institute of China Electronics Technology Group Corp. (China)
Dao Zhang, The 55th Research Institute of China Electronics Technology Group Corp. (China)
Jidong Yang, Nanjing Covision Inc. (China)
Yu Chen, Nanjing Covision Inc. (China)
Jianli Li, Nanjing Institute of Advanced Laser Technology (China)


Published in SPIE Proceedings Vol. 10556:
Advances in Display Technologies VIII
Liang-Chy Chien; Tae-Hoon Yoon; Qiong-Hua Wang, Editor(s)

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