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18 September 2007 Diffuser array for a light-emitting diode backlight system
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A novel light-emitting diode backlight module applied in liquid crystal displays is demonstrated. With microgrooves on the bottom surface and diffusive dots on the upper surface of the light guide plate (LGP), most of the incident backlight is utilized effectively and the dispersion of light is decreased obviously. The design procedure of optimization for the backlight module is accomplished by the TracePro optical simulation software. Relationship between the dimensions of microgrooves and diffusive dots are investigated and discussed in detail. By using the structure of microgrooves and diffusive dots on the LGP, the incident light satisfies the total internal reflection conditions and reflects from the bottom surface then spread by the diffusive dots. Compared to the conventional backlight devices, the light uniformity and light intensity for the LGP are improved by our design.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yeu-Jent Hu, Jiunn-Chyi Lee, Yi-Ping Wang, Ya-Fen Wu, and Lih-Gen Sheu "Diffuser array for a light-emitting diode backlight system", Proc. SPIE 6670, Nonimaging Optics and Efficient Illumination Systems IV, 66700Q (18 September 2007);

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