量子点背光液晶显示技术的亥姆霍兹-科尔劳施效应  

Illustrating the Helmholtz-Kohlrausch effect of quantum dots enhanced LCD through a comparative study

作　　者：季洪雷 程尚君 李鹏飞 张彦 葛子义[1,2] 钟海政 JI Hong-lei;CHENG Shang-jun;LI Peng-fei;ZHANG Yan;GE Zi-yi;ZHONG Hai-zheng(Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201;University of Chinese Academy of Sciences,Beijing 100049;School of Materials Science&Engineering,Beijing Institute of Technology,Beijing 100081;R&D Center,TCL Electronics Co.,Ltd.,Shenzhen 518000,China;Ningbo Excite Technology Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所,宁波315201 [2]中国科学院大学,北京100049 [3]北京理工大学材料学院,北京100081 [4]TCL电子有限公司研发中心,深圳518000 [5]宁波激智科技股份有限公司,宁波315000

出　　处：《中国光学》2022年第1期132-143,共12页Chinese Optics

基　　金：国家重点研发计划(No.2017YFB0404600)。

摘　　要：亥姆霍兹-科尔劳施效应(简称H-K效应)指的是人眼对色光的感知亮度随着色纯度的增加而提升的现象。量子点背光技术可显著提升液晶显示的色域和视觉感知亮度,已经在众多显示产品中开始应用。本论文通过观看者亮度感知实验,对比了YAG荧光粉白光LED背光电视(YAG电视)和量子点背光电视(量子点电视)的H-K效应差异,根据Kaiser模型与Nayatani模型分析纯色实验的测试结果,并通过彩色实验探究了显示器的色域对感知亮度与主观偏好的影响。实验结果表明:量子点电视具有更为显著的H-K效应,视觉感知亮度明显高于传统YAG电视;在同样的感知亮度下,量子点电视的纯色R、G的物理亮度仅为YAG电视的75%、86%;鲜艳彩色画面的物理亮度为YAG电视的74%~88%;在相同感知亮度下,高色域的量子点电视更受欢迎,并且喜好趋势将随着亮度的增加而增加。上述结果对于健康显示的发展具有重要指导意义。Helmholtz-Kohlrausch effect(H-K effect)describes the influence of color purity on the perceived brightness of a colored object.Quantum dots(QD)based backlights can enhance the color quality of Liquid Crystal Display(LCD)with improved perceived brightness due to the well-known H-K effect.However,the H-K effect of QD embedded TVs(also known as QLED TV)has not been fully demonstrated.In this paper,we investigated the H-K effect of QLED TVs through a comparative study between QLED backlights and YAG-LED backlights.By comparing the viewers’experimental results with the Kaiser and Nayatani model,we demonstrate that a QLED TV shows significant H-K effect.To achieve the same perceived brightness with YAG-LED TV,the physical brightness of QLED TV was greatly decreased to 75%for pure red,86%for pure green,and 74%-88%for bright colorful images.Moreover,QLED TVs are strongly preferred over YAG-LED TVs even when both QLED TV and YAG-LED TV show the same perceived brightness.The results imply the bright future of QLED TVs toward healthly displays.

关 键 词：量子点电视 H-K效应 感知亮度 显示 色彩 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术] TH691.9[自动化与计算机技术—计算机科学与技术]