1 福州大学 平板显示技术国家地方联合工程实验室，福建 福州350002
2 福州大学 电子科学与技术博士后科研流动站，福建 福州350002
为实现液晶显示中背光源的色域扩展和白平衡，本文基于CIE1931色度学系统，研究了光致发光量子点背光源的混色理论，采用高斯函数拟合光谱曲线，构建了量子点背光源的光谱函数模型，提出了量子点光谱与色坐标之间的互转换方法，最终实现背光源的白平衡。首先，在保持光谱有效信息的基础上，将复杂光谱数据拟合为拟定参数的高斯函数叠加; 然后，根据CIE1931XYZ系统的色坐标求解光谱分布函数及其高斯参数。实验以色温为5 560 K、6 500 K和10 000 K的量子点背光源作为基准进行了白平衡的理论验证，得到了光谱分布函数并评价了量子点背光源的白平衡颜色特性，验证了其光谱和色坐标之间准确而高效的互转换，简化了光谱曲线的基本函数形式和数值计算量，实现了数据压缩，对实现量子点背光源的白平衡实验提供了必要的技术依据和理论指导。
量子点 液晶背光 光谱 色坐标 色域 quantum dot LCD backlight light spectrum color coordinates color gamut
Author Affiliations
Abstract
1 National and Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, China
2 Postdoctoral Research Station of Electronic Science and Technology, Fuzhou University, Fuzhou 350002, China
3 3D Visualization and Imaging System Lab, College of Optical Sciences, University of Arizona, Arizona 85721, USA
An effective design method of freeform micro lens array is presented for shaping varied laser beams into prescribed rectangular illumination. The variable separation mapping is applied to design concave freeform surfaces for constructing a freeform lens array. Several dedicated examples show that the designed freeform optical lens array can achieve a prescribed rectangular illumination pattern, especially without considering the initial states of incident laser beams. Both high collection efficiency and good spatial uniformity can be available simultaneously. Tolerance analysis is also performed to demonstrate that this optical device can well avoid fabricating difficulty in actual applications.
光电子快报（英文版）
2016, 12(4): 253
