量子点背光液晶显示技术的亥姆霍兹-科尔劳施效应

季洪雷; 程尚君; 李鹏飞; 张彦; 葛子义; 钟海政

doi:10.37188/CO.2021-0058

量子点背光液晶显示技术的亥姆霍兹-科尔劳施效应

季洪雷^{1, 2, 4,},
程尚君^3,,
李鹏飞^4, ,,
张彦⁵,
葛子义^{1, 2},
钟海政^3, ,

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

详细信息

中图分类号: TP394.1; TH691.9
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出版历程
- 收稿日期: 2021-03-17
- 修回日期: 2021-04-27
- 录用日期: 2021-05-28
- 网络出版日期: 2021-05-28
- 刊出日期: 2022-01-19

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

doi: 10.37188/CO.2021-0058

JI Hong-lei^{1, 2, 4
,},
CHENG Shang-jun^3
,,
LI Peng-fei^{4
, ,},
ZHANG Yan⁵,
GE Zi-yi^{1, 2},
ZHONG Hai-zheng^{3
, ,}

1.
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201
2.
University of Chinese Academy of Sciences, Beijing 100049
3.
School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081
4.
R & D Center, TCL Electronics Co., Ltd., Shenzhen 518000, China
5.
Ningbo Excite Technology Co., Ltd., Ningbo 315000, China

Funds: Supported by National Key R&D Program (No. 2017YFB0404600)

More Information

Author Bio:
Ji Hong-lei (1980—), male, born in Baicheng City, Jilin province. He obtained his Master degree in 2007 from Changchun University of Science and Technology. He is senior engineer and now working at TCL Electronics R&D Center. His project is focused on the research of new materials and technologies for display technology. E-mail: jihl@tcl.com

Cheng Shang-jun (1997—), male, born in Yining, XinJiang Province, he obtained his Bachelor′s degree in 2019 from Beijing Institute of Technology (BIT). His project is focused on the research of perovskite quantum dot based composites for photonic and optoelectronic applications. E-mail: 3120191108@bit.edu.cn

Li Peng-fei (1994—), male, born in Handan City, Hebei Province. He obtained his Master degree in 2019 from Harbin Institute of Technology. He is now a electronic R&D engineer at TCL. He mainly engaged in the research of visual perception. E-mail: pengfei7.li@tcl.com

Zhong Hai-zheng (1981—), male, born in Qinghe City, Hebei Province. He obtained his Bachelor′s degree in 2003 from Jilin University, and then undertook his Ph.D. studies at the Institute of Chemistry, Chinese Academy of Sciences (ICCAS) with Prof. Yongfang Li from 2003 to 2008. His current research interests are in the area of colloidal quantum dots for photonics and optoelectronics. E-mail: hzzhong@bit.edu.cn

Corresponding author: pengfei7.li@tcl.com; hzzhong@bit.edu.cn

摘要

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。
- 量子点电视 /
- H-K效应 /
- 感知亮度 /
- 显示 /
- 色彩
Abstract: 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.
- QLED TV /
- Helmholtz-Kohlrausch effect /
- perceived brightness /
- display /
- colority

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图 1 （a）纯色实验测试示意图；（b）彩色实验测试示意图

Figure 1. (a)Schematic diagram for the solid color experiment; (b) schematic diagram for the multicolor experiment

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图 2 量子点电视与YAG电视的（a）白光光谱及（b）色域图

Figure 2. (a)White light spectrum and (b) color gamut of QLED TV and YAG-LED TV

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图 3 纯色实验QD/YAG的理论值与实测值对比

Figure 3. Comparison of theoretical calculation results and measured values of brightness ratio (QD/YAG) in solid color experiment

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图 4 彩色实验不同图片QD/YAG实测值对比曲线

Figure 4. The curves of QD/YAG of different pictures in multicolor experiment

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图 5 相同感知亮度下的主观喜好比例

Figure 5. Preferential ratio under the same perceived brightness

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表 1 Key parameters of test environment

Table 1. Key parameters of test environment

Experimental environment	Parameters
Viewing distance	2 m
Viewer position	Horizontal midline
Ambient light	Illuminance	105~156 lx
Ambient light	Color temperature	5500 K
Source channel	HDMI
Luminance	200~500 nit

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