19 February 2018 Light trapping for outside laser-display light harvesting
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Proceedings Volume 10556, Advances in Display Technologies VIII; 105560K (2018) https://doi.org/10.1117/12.2286874
Event: SPIE OPTO, 2018, San Francisco, California, United States
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.
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Yu Ping Zhang, Yu Ping Zhang, Guanjun Wang, Guanjun Wang, Kaian Wang, Kaian Wang, Wen Song, Wen Song, Liang Chen, Liang Chen, Cheng Jiao, Cheng Jiao, Dao Zhang, Dao Zhang, Jidong Yang, Jidong Yang, Yu Chen, Yu Chen, Jianli Li, Jianli Li, } "Light trapping for outside laser-display light harvesting", Proc. SPIE 10556, Advances in Display Technologies VIII, 105560K (19 February 2018); doi: 10.1117/12.2286874; https://doi.org/10.1117/12.2286874
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