P‐125: A Novel Method to Increase the Transmittance of Full Display with Camera

Xu, Chuan X.; Yao, Qi; He, Wei; Shu, Shi; Yuan, Guang C.

doi:10.1002/sdtp.16824

Symp Digest of Tech Papers

2023

DOI: 10.1002/sdtp.16824

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P‐125: A Novel Method to Increase the Transmittance of Full Display with Camera

Chuan X. Xu,

Qi Yao,

Wei He

et al.

Abstract: A novel PI substrate structure was developed for FDC to improve the transmittance, that is, the first layer of double‐layer PI is patterned. The crystalline state of polysilicon and evaporation shadow of this structure have proved that the structure is feasible. This structure can avoid the warping of single‐layer PI, and achieve the same transmittance as single‐layer PI.

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2024

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Cited by 2 publications

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Thermally Stable and Transparent Polyimide Derived from Side‐Group‐Regulated Spirobifluorene Unit for Substrate Application

Fang,

Lu,

Xiao

et al. 2024

Macromol. Rapid Commun.

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Advancements in flexible electronic technology, especially the progress in foldable displays and under‐display cameras (UDC), have created an urgent demand for high‐performance colorless polyimide (CPI). However, current CPIs lack sufficient heat resistance for substrate applications. In this work, four kinds of rigid spirobifluorene diamines are designed, and the corresponding polyimides are prepared by their condensation with 5,5′‐(perfluoropropane‐2,2‐diyl) bis(isobenzofuran‐1,3‐dione) (6FDA) or 9,9‐bis(3,4‐dicarboxyphenyl) fluorene dianhydride (BPAF). The rigid and conjugated spirobifluorene units endow the polyimides with higher glass transition temperature (Tg) ranging from 356 to 468 °C. Their optical properties are regulated by small side groups and spirobifluorene structure with a periodically twisted molecular conformation. Consequently, a series of CPIs with an average transmittance ranging from 75% to 88% and a yellowness index (YI) as low as 2.48 are obtained. Among these, 27SPFTFA‐BPAF presents excellent comprehensive performance, with a Tg of 422 °C, a 5 wt.% loss temperature (Td5) of 562 °C, a YI of 3.53, and a tensile strength (δmax) of 140 MPa, respectively. The mechanism underlying the structure‐property relationship is investigated by experimental comparison and theoretical calculation, and the proposed method provides a pathway for designing highly rigid conjugated CPIs with excellent thermal stability and transparency for photoelectric engineering.

show abstract

Thermally Stable and Transparent Polyimide Derived from Side‐Group‐Regulated Spirobifluorene Unit for Substrate Application

Fang,

Lu,

Xiao

et al. 2024

Macromol. Rapid Commun.

View full text Add to dashboard Cite

show abstract

54‐4: Innovative Research on Full Display Technology for Face Recognition

Wang,

Zhang,

Yan

et al. 2024

Symp Digest of Tech Papers

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This paper mainly introduces related research of the full screen technology for face recognition under OLED screen. By analyzing and studying the influence of infrared light irradiation on OLED screen, especially the influence of infrared light irradiation on TFT, the relevant mechanism analysis is completed, and the corresponding optimization solution is proposed, so as to realize face recognition under the screen, achieve the perfect technical combination of full screen and infrared face recognition, and realize true full screen display.

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P‐125: A Novel Method to Increase the Transmittance of Full Display with Camera

Cited by 2 publications

References 12 publications

Thermally Stable and Transparent Polyimide Derived from Side‐Group‐Regulated Spirobifluorene Unit for Substrate Application

Thermally Stable and Transparent Polyimide Derived from Side‐Group‐Regulated Spirobifluorene Unit for Substrate Application

54‐4: Innovative Research on Full Display Technology for Face Recognition

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