固态体积式真三维立体显示发光二极管投影光源  

LED-based projection light source for solid-state volumetric true-3D display

作　　者：冯奇斌[1] 杨光磊[2] 井长龙[2] 吕国强[1] 

机构地区：[1]合肥工业大学光电技术研究院特种显示技术教育部重点实验室特种显示技术国家工程实验室现代显示技术省部共建国家重点实验室,安徽合肥230009 [2]合肥工业大学仪器科学与光电工程学院,安徽合肥230009

出　　处：《光学精密工程》2014年第5期1113-1119,共7页Optics and Precision Engineering

基　　金：国家863高技术研究发展计划资助项目(No.2012AA011901);广东省战略性新兴产业核心技术攻关项目(No.2011A010801003)

摘　　要：针对固态体积式真三维立体显示对高亮度和色温可调的要求,设计了采用大功率、单芯片发光二极管(LED)的投影光源。理论计算了投影光源的亮度,结合液晶光阀对不同波长透过率的影响,对理论设计结果进行了修正。考虑寿命、散热等影响因素,提出了采用大功率红绿蓝LED加白光LED的投影光源方案。针对选取的LED发光特性,采用混合集光方法设计了准直器,并进行了仿真和实际测试。测试结果表明:采用准直器后,LED的发散角从±75°减小为±20°。搭建了真三维显示系统样机,测试其屏前亮度达到149cd/m2,且无闪烁,立体感强,但存在视角较小的问题。实验显示,设计的投影光源满足固态体积式真三维立体显示的要求。According to the needs of solid-state volumetric true-3Ddisplay for high brightness and adjustable color temperatures,aprojection light source with high power and single chip Light Emitting Diodes（LEDs）was designed.The brightness of the projection light source was computed theoretically.The results were then corrected according to the spectrum curve of a Liquid Crystal（LC）shutter. With the considerations of life and heat dissipation,the projection light source with high-power RGB LEDs and a white LED was put forward.Based on the optical characteristics of the chosen LEDs,the refraction-and-reflection mixed method was applied to the design of collimating lens.Both simulation and practical test were performed on the projection light source.The experimental results show thatthe divergence angle of the LED has been reduced from ±75°to ±20°after applying the collimating lens.A 3Ddisplay prototype was developed.The practical luminance on the LC shutter close to observers reaches 149cd/m2.The prototype presents the merits of no perceived flickers and strong 3D feeling,as well as the shortcoming of a smaller viewing angle.The proposed light source satisfies the requirements of solid-state volumetric true-3Ddisplay.

关 键 词：真三维立体显示 固态体积式显示 发光二极管 投影光源 

分 类 号：TN27[电子电信—物理电子学] TH741.5[机械工程—光学工程]