Direct Design of Thin and High-Quality Direct-Lit LED Backlight Systems

IEEE Photonics Journal

Jun She¹  Ping Zeng²  Min Wang³  Yingli Liu⁴  Yaoguang Ma⁴  Zhanghao Ding⁴  Zhenrong Zheng⁴  Rengmao Wu⁵ 

[1] CECEP Latticelighting Co., Ltd., Nanchang, China;D Institute Co., Ltd., Nanchang, China;;Nanchang Opto-Electric R&State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China;Yejia Optical Technology (Guangdong) Corporation, Dongguan, China;

关键词: Backlight system;    Illumination design;    LED array;    Non-zero étendue;   

DOI  :  10.1109/JPHOT.2021.3068746

来源: DOAJ

【 摘 要 】

The direct-lit LED backlight is a key component in large-area LCD displays. The existing methods which rely on point source assumption and irradiance feedback are less effective in compact designs in near field, and designing thin and high-quality back-lit LED backlights still remains a challenging issue. In this paper, we develop a direct method for designing thin and high-quality back-lit LED backlight systems. The étendue of LED light sources is considered in the numerical calculation of the lens profiles without cumbersome Monte Carlo ray tracing, which allows us to obtain compact LED lighting modules and achieve accurate control of the near-field irradiance distribution of the backlight system. Two examples are presented to demonstrate the elegance of this method in designing thin and high-quality back-lit LED backlights.

【 授权许可】

Unknown