Chinese Journal of Liquid Crystals and Displays, Volume. 40, Issue 7, 976(2025)

Verification and stacking design of OLED flexible screen impression improvement

Qihe LE1、*, Feng GUO2, Chen MIAO1, and Meilin CHEN1
Author Affiliations
  • 1College of Mechanical Engineering and Automation,Huaqiao University,Xiamen 361021,China
  • 2Shanghai Jike Blue New Energy Technology Co. Ltd.,Shanghai 200232,China
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    Figures & Tables(13)
    Schematic diagram of impression.(a)FPC edge pulling;(b)Device stress.
    Schematic diagram of the mechanism of impression caused by FPC edge pulling
    Slice analysis of the impression
    Schematic diagram of the mechanism of imprint caused by force on FPC devices(blue area represents the stress concentration area of the device)
    Comparison of the old and new equipment.(a)Old equipment;(b)New equipment.
    Influence of different materials,layers and foam on impressions.
    Influence of different material thicknesses and NFC stacking material hardness on impressions
    Stacking design of old version flexible screen
    Optimized flexible screen stacking design
    • Table 1. Verification scheme 1

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      Table 1. Verification scheme 1

      序号方 案说 明对比原方案优点
      1复合泡棉的PI改为PET换用更硬的PETPET较硬,挺性更好
      2PET放在泡棉下面交换叠层结构PET较硬,挺性更好靠近屏体,分散屏体受力
      3泡棉换成岩谷产品(复合PI)手机项目用泡棉手机项目泡棉型号验证良好(印痕问题反馈较少)
      4泡棉换成冉聚产品(复合PI)国产泡棉验证手机项目验证良好,同步对比国产泡棉抗印痕能力
      5NFC加大到泡棉等大设计增加挺性(IC处除外)背面平整性更好,减少断差
    • Table 2. Comparison 1 of average test data

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      Table 2. Comparison 1 of average test data

      序号方 案平均值/N与基准条件的差距/%
      1复合泡棉的PI改为PET1.359-
      2PET放在泡棉下面1.4778.68
      3泡棉换成岩谷产品(复合PI)1.257-7.51
      4泡棉换成冉聚产品(复合PI)1.190-12.44
      5NFC加大到泡棉等大设计0.777-42.83
    • Table 3. Verification scheme 2

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      Table 3. Verification scheme 2

      序号方 案说 明对比原方案优点
      6复合泡棉+PI改为0.18 mmPET增加挺性PET加厚,进一步增强抗印痕能力
      7NFC基材加厚基材厚度由12.5 μm→25.4 μm增加NFC基材硬度,增强抗印痕能力
      8NFC基材油墨改为覆盖膜(聚酰亚胺(PI)材质,厚度50 μm)增加挺性NFC厂商建议,覆盖膜比油墨抗压力强
      9NFC基材加厚+油墨改为覆盖膜方案7+方案8叠加两项增强,进一步增加抗印痕能力
    • Table 4. Comparison 2 of average test data

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      Table 4. Comparison 2 of average test data

      序号方 案平均值/N与基准条件的差距/%
      6复合泡棉+PI改为0.18 mmPET2.24164.90
      7NFC基材加厚2.42478.37
      8NFC基材油墨改为覆盖膜1.80532.82
      9NFC基材加厚+油墨改为覆盖膜3.112128.99
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    Qihe LE, Feng GUO, Chen MIAO, Meilin CHEN. Verification and stacking design of OLED flexible screen impression improvement[J]. Chinese Journal of Liquid Crystals and Displays, 2025, 40(7): 976

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    Paper Information

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    Received: Feb. 27, 2025

    Accepted: --

    Published Online: Aug. 11, 2025

    The Author Email: Qihe LE (leqihe@hqu.edu.cn)

    DOI:10.37188/CJLCD.2025-0047

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