Reflective high-efficiency color filters for wide color gamut LCD

LU Wen-xin; ZHAO Yun-lu; YIN Shi-wen; ZHOU Zi-han; MA Hong-mei; SUN Yu-bao

doi:10.37188/CJLCD.2023-0266

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Reflective high-efficiency color filters for wide color gamut LCD

Device Physics and Device Preparation | 更新时间：2024-07-28

- Reflective high-efficiency color filters for wide color gamut LCD
- Chinese Journal of Liquid Crystals and Displays Vol. 38, Issue 12, Pages: 1653-1663(2023)
- 作者机构：
  
  河北工业大学应用物理系，天津 300401
- 作者简介：
- 基金信息：
  
  Natural Science Foundation of Hebei Province of China(F202202017)
- DOI：10.37188/CJLCD.2023-0266
  CLC： TN141.9;O484.4
- Received：14 August 2023，
  
  Revised：22 September 2023，
  
  Published：05 December 2023
- 稿件说明：
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LU Wen-xin, ZHAO Yun-lu, YIN Shi-wen, et al. Reflective high-efficiency color filters for wide color gamut LCD[J]. Chinese journal of liquid crystals and displays, 2023, 38(12): 1653-1663.
DOI：

LU Wen-xin, ZHAO Yun-lu, YIN Shi-wen, et al. Reflective high-efficiency color filters for wide color gamut LCD[J]. Chinese journal of liquid crystals and displays, 2023, 38(12): 1653-1663. DOI： 10.37188/CJLCD.2023-0266.

摘要

为了提高宽色域液晶显示器的光效率，本文提出了一种反射式彩色滤光片。首先计算了反射式彩色滤光片的光效率增强效果，然后设计了基于低中高折射率介质的多层堆叠结构（［ABCCBA］

）的彩色滤光片，在使用带有黄色荧光粉的白光二极管（YAG-LED）和量子点（QD）背光单元时，光效率分别从17.4%提升到32.9%，从18.5%提高到58.9%，同时该结构的色域提高到了120.7% NTSC和131.2% NTSC。考虑背光模组中散射膜的作用，计算了入射光角度在20°以内时，带有YAG-LED和QD背光的LCD光效率依然分别大于32%和56%，色域基本不变。这些结果在宽色域液晶显示器中具有重要的潜在应用前景。

Abstract

In order to improve the light efficiency of wide color gamut liquid crystal displays （LCD）， this paper proposed a reflective color filter. First， the enhancement effect of the light efficiency of the reflective color filter was calculated. Then， a multi-layer stack structure （［ABCCBA］

） of the color filter was designed based on low， medium， and high refractive index materials. Using white light emission diode backlight unit with yellow phosphor （YAG-LED） and quantum dot （QD） backlight unit， the light efficiency was increased from 17.4% to 32.9% and from 18.5% to 58.9%， respectively. At the same time， the color gamut of this structure also improved to 120.7% NTSC and 131.2% NTSC. Considering the role of the scattering film in the backlight module， the light efficiency of LCD with YAG-LED and QD backlight unit is still greater than 32% and 56% respectively when the incident light angle is within 20°. The color gamut remains essentially unchanged. These results hold significant potential for applications in wide color gamut LCD.

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references

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