Browsing by Author "Chen, Bo-Tsuen"

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Design of a Novel Integrated Light Guiding Plate without the Reflective Sheet for Backlight Module Application
(2012-01-01)
Hu, Ya-Wen
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Chen, Bo-Tsuen
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Pan, Jui-Wen
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光電系統研究所
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生醫電子轉譯研究中心
We design a backlight system, which consists of a novel light guide plate (LGP) and one diffuser. Comparing with a conventional backlight module, the on-axis luminance can be improved up to 6.1-times and the half-luminance angle decreased to 10 degrees in the vertical direction, and decreased to 6 degrees in the horizontal direction.
Dual-view angle backlight module design
(2015-10-01)
Chen, Bo-Tsuen
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Pan, Jui-Wen
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光電系統研究所
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生醫電子轉譯研究中心
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Institute of Photonic System
We propose a bilayer light guide plate (BLGP) with specially designed microstructures and two light source modules to achieve an adjustable viewing angle backlight for ecofriendly displays. The dual viewing angle backlight module has a thin, simple structure and a high optical efficiency. Comparison with the conventional edge-lit backlight module shows an improvement in the on-axis luminance of the narrow viewing angle mode of 4.3 times and a decrease in the half-luminance angle of 7 degrees in the horizontal direction. When using the wide viewing angle mode, there is an improvement in the on-axis luminance of 1.8 times and an improvement in the half-luminance angle of 54 degrees in the horizontal direction. The uniformity of illuminance can reach 80% in each mode. The backlight optical sheet number is reduced from 5 to 1. (C) 2015 Optical Society of America
High-efficiency directional backlight design for an automotive display
(2018-06-01)
Chen, Bo-Tsuen
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Pan, Jui-Wen
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光電系統研究所
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Institute of Photonic System
We propose a high-efficiency directional backlight module (DBM) for automotive display applications. The DBM is composed of light sources, a light guide plate (LGP), and an optically patterned plate (OPP). The LGP has a collimator on the input surface that serves to control the angle of the light emitted to be in the horizontal direction. The OPP has an inverse prism to adjust the light emission angle in the vertical direction. The DBM has a simple structure and high optical efficiency. Compared with conventional backlight systems, the DBM has higher optical efficiency and a suitable viewing angle. This is an improvement in normalized on-axis luminous intensity of 2.6 times and a twofold improvement in optical efficiency. The viewing angles are 100 degrees in the horizontal direction and 35 degrees in the vertical direction. The angle of the half-luminous intensity is 72 degrees in the horizontal direction and 20 degrees in the vertical direction. The uniformity of the illuminance reaches 82%. The DBM is suitable for use in the center information displays of automobiles. (C) 2018 Optical Society of America