Chinese Journal of Liquid Crystals and Displays, Volume. 38, Issue 3, 291(2023)

Research progress of quantum dot light conversion films for backlight in liquid crystal displays

Shi-rong YU, Yong-yin KANG*, Hai-lin WANG, and Wei ZHU
Author Affiliations
  • Najing Research Institute,Najing Technology Corporation Ltd.,Hangzhou 310052,China
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    Figures & Tables(20)
    Schematic diagram of working principle of Q-LCF in LCD
    Spectral comparison of normal BLU and Q-LCF BLU
    Schematic of position of Q-LCF in LCD module
    Structure diagram of typical Q-LCF
    Design and development process of Q-LCF matches
    Spectra of OC
    Spectra of backlight and fluorescence-emission
    Test results of Q-LCF under accelerated aging condition
    Scheme of the correlation of photophysical processes with photochemical reactions of semiconductor nanocrystals under a H2O or/and O2 atmosphere[25]
    Scheme of CdSe@ZnSe alloyed QDs[33]
    Solubility of CdSe QD-ligands[39]
    Stability of siloxane-encapsulated QDs[44]
    Photostabilities of(a)MAPB-QD and(b)MAPB-QDs/SiO2 powders,and their films with different RH values under illumination with a 470 nm LED light[45].
    (a)Diagram of the integrated prism sheet on QD film with bridge patterns in a BLU system;(b)Absorption and emission spectra of QD 530 nm and QD 615 nm with an emission spectrum of blue LED[46].
    (a)Schematic of the preparation of QD/OS hybrid films;(b)Schematic illustration for the synthesis of thiol-containing polymeric OS ligands(TMP371)[47].
    • Table 1. Corresponding relationship between different quantum dot wavelengths and gamut coverage

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      Table 1. Corresponding relationship between different quantum dot wavelengths and gamut coverage

      色域DCI-P3随量子点波长(半峰宽25 nm)的变化/%
      波长组合/nm520525530535540545
      61574.6280.2285.4390.1992.7690.82
      62077.3583.2088.6893.7196.6993.26
      62579.0884.9290.2494.8196.9693.73
      63080.0485.8990.9495.1597.0194.08
      63580.6586.3291.2795.2396.9994.29
    • Table 2. Correspondence between wavelength of different quantum dots and optical conversion efficiency

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      Table 2. Correspondence between wavelength of different quantum dots and optical conversion efficiency

      光效随量子点波长(半峰宽25 nm)的变化/%
      波长组合/nm520525530535540545
      615105.08108.47111.28113.56115.32116.70
      620101.28104.73107.66110.13112.15113.84
      62596.52100.00103.03105.69107.99110.06
      63090.8594.3197.43100.27102.89105.38
      63584.3787.7490.9193.9296.8499.75
    • Table 3. Test results of key characteristic optical parameter of Q-LCF

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      Table 3. Test results of key characteristic optical parameter of Q-LCF

      光学参数/nm激发光谱峰发射光谱峰1发射光谱峰2
      峰值波长450536622
      半峰宽182726
    • Table 4. Measurement results of color coordinate and luminance of optical of Q-LCF

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      Table 4. Measurement results of color coordinate and luminance of optical of Q-LCF

      样品号色坐标 X色坐标 Y亮度/(cd·m-2
      s-10.259 70.238 11 808
      s-20.260 10.2391 813
      s-30.259 70.238 31 813
      s-40.260 10.2391 817
      s-50.259 90.238 61 818
      s-60.259 60.238 21 817
      s-70.260.238 91 818
      s-80.260 10.2391 820
      s-90.260 10.2391 817
      最小值0.259 60.238 11 808
      最大值0.260 10.2391 820
      平均值0.259 90.238 71 816
      均匀度99.3%
    • Table 5. Measurement results of optical conversion efficiency,photon absorption rate,transmittance and haze

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      Table 5. Measurement results of optical conversion efficiency,photon absorption rate,transmittance and haze

      样本号光转换效率/%光子吸收率/%透过率/%雾度/%
      s-156.174.157.292.6
      s-256.674.157.392.4
      s-355.973.858.092.9
      s-456.374.157.192.1
      s-556.574.157.292.8
      s-656.373.857.092.7
      s-756.374.157.192.1
      s-856.874.057.792.6
      s-956.274.057.592.8
      最小值55.973.857.092.1
      最大值56.874.158.092.9
      平均值56.374.057.392.6
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    Shi-rong YU, Yong-yin KANG, Hai-lin WANG, Wei ZHU. Research progress of quantum dot light conversion films for backlight in liquid crystal displays[J]. Chinese Journal of Liquid Crystals and Displays, 2023, 38(3): 291

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    Paper Information

    Category: Research Articles

    Received: Oct. 31, 2022

    Accepted: --

    Published Online: Apr. 3, 2023

    The Author Email: Yong-yin KANG (332758417@qq.com)

    DOI:10.37188/CJLCD.2022-0365

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