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Proceedings Paper

Antireflection and self-cleaning film with moth-eye-like structure for mobile flexible displays (Conference Presentation)
Author(s): Guanjun Tan; Yi-Hsin Lan; Mao-Kuo Wei; Lung-Han Peng; I-Chun Cheng; Shin-Tson Wu; Jiun-Haw Lee

Paper Abstract

Ambient contrast ratio (A-CR) is a critically important characteristic for mobile displays. For transmissive and emissive displays (such as liquid crystal display, light-emitting diode, and organic light-emitting diode), A-CR decreases dramatically as the ambient light increases, which degrades the image quality, especially for outdoor applications. Moth-eye-like structure greatly reduces the surface reflection and improves A-CR. For a touch panel display, the surface should be robust enough to resist possible mechanical scratches and to self-clean possible contaminations from fingerprints and dusts. In this paper, we demonstrate the moth-eye-like structure fabricated on a hard-coating layer with additional surface treatment for self-cleaning property upon the flexible film. By laminating the film unto a display device, the luminous reflectance is reduced to ~0.23%, which improves the A-CR by ~4X under the sun. Note that although the surface reflection is reduced, the haze remains negligible, implying that the image quality is not blurred. The nanostructure was fabricated on the hard-coating layer which is typically used as the protective film of the mobile display and hence it is anti-scratched. Typically, nanostructure exhibits hydrophobic and olephobic properties. With suitable surface treatment by amphiphilic molecules, such characteristics are further improved with excellent self-cleaning properties. Besides, our nanostructured hard-coating film can be fabricated on different flexible films, such as TAC and PET, which means this broadband antireflection film can be used for flexible displays.

Paper Details

Date Published: 14 March 2018
Proc. SPIE 10556, Advances in Display Technologies VIII, 1055608 (14 March 2018);
Show Author Affiliations
Guanjun Tan, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Yi-Hsin Lan, National Taiwan Univ. (Taiwan)
Mao-Kuo Wei, National Dong Hwa Univ. (Taiwan)
Lung-Han Peng, National Taiwan Univ. (Taiwan)
I-Chun Cheng, National Taiwan Univ. (Taiwan)
Shin-Tson Wu, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Jiun-Haw Lee, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 10556:
Advances in Display Technologies VIII
Liang-Chy Chien; Tae-Hoon Yoon; Qiong-Hua Wang, Editor(s)

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