55.2: The Optical Design and Optimization of Light Guide Film for Ultra Thin 1.9ʺ TFT LCD Display Panel

2009 ◽  
Vol 40 (1) ◽  
pp. 823 ◽  
Author(s):  
Fu-Chen Fan ◽  
Chin-Yen Chen ◽  
Hsu-Sheng Hsu ◽  
Chih-Wei Chen
Keyword(s):  
Light Guide ◽  
Optical Design ◽  
Design And Optimization ◽  
Lcd Display

Optical design of light guide prisms with surface roughness for automotive tail lights

2020 ◽  
Vol 234 (9) ◽  
pp. 2393-2401
Author(s):  
Elif Güney ◽  
Mürsel Alper ◽  
Mürşide Hacıismailoğlu
Keyword(s):  
Surface Roughness ◽  
Light Guide ◽  
Optical Design ◽  
Luminous Intensity ◽  
Legal Requirements ◽  
Design Software ◽  
Simulation Results ◽  
Light Guides ◽  
Illuminance Uniformity

This study presents the optical design of light guide prisms for automotive tail light applications to obtain the optimum luminous intensity and the illuminance uniformity. The design was achieved using optical design software, SPEOS. By considering the axial luminous intensity and legal requirements, the optimum prism angles of light guides were determined by simulations. After determining the prism angles, the effect of different surface roughness on the luminous intensity and the illuminance uniformity was investigated. The light guides designed by considering data from the simulation were manufactured as prototypes and their photometrical measurements were made. These measurements were compared to the simulation results. It was observed that simulation and prototype results are well in agreement with each other. Furthermore, it was found that as the surface roughness increases both the luminous intensity decreases and the illumination becomes more uniform.

Development of a Light Guide Film with Optimal Design and Roll to Roll Microfabrication Technology

2013 ◽  
Vol 284-287 ◽  
pp. 2729-2734
Author(s):  
Min Wen Wang ◽  
Wei Chuang Lin ◽  
Ming Hsiao Lee
Keyword(s):  
Neural Network ◽  
Stainless Steel ◽  
Light Guide ◽  
Liquid Crystal Display ◽  
Optical Design ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Optical Quality ◽  
Optical Simulation ◽  
Roll To Roll

Neural network optimal optical design and Roll to Roll (R2R) microfabrication has been integrated in the development of a light guide film (LGF) for liquid crystal display application in this study. TracePro software was used for optical simulation work for the light guide film. Back-propagation neural network (BPNN) was applied to establish a light guide film optical quality predictor. Combined with genetic algorithms (GA), global optimization of the optical quality was achieved. The optimal pattern radii of different zones range from 40 μm to 210 μm were first transferred to an 80 μm thick stainless steel sheet through lithograpgy and etching process. The patterned sheet was then wrapped around the stainless steel roller for R2R fabrication of the patterns on a 188 μm thick PET substrate with UV resin. When operated with imprinting pressure of 0.61 MPa and substrate speed of 0.251 m/min, the LGF measurement results showed that the replication rate is around 98% while the luminace uniformity reaches 74.9%.

Optical design and optimization for back-contact perovskite solar cells

Solar Energy ◽  
2020 ◽  
Vol 201 ◽  
pp. 84-91 ◽  
Author(s):  
Weichuang Yang ◽  
Zhenhai Yang ◽  
Chunhui Shou ◽  
Jiang Sheng ◽  
Baojie Yan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Optical Design ◽  
Perovskite Solar Cells ◽  
Back Contact ◽  
Design And Optimization
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