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Design and Pareto solution analysis of novel alignment-free ultra-thin multi-layered diffuser film applied for mini-LED backlighting and general lighting applications.

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Title: Design and Pareto solution analysis of novel alignment-free ultra-thin multi-layered diffuser film applied for mini-LED backlighting and general lighting applications.
Authors: Nishikawa, Marii1,2 (AUTHOR) Nishikawa-M8@mail.dnp.co.jp, Taniguchi, Yukio1 (AUTHOR), Goto, Masahiro1 (AUTHOR), Ohyagi, Yasuyuki1 (AUTHOR), Kanai, Yoshihiro1 (AUTHOR), Sekido, Masayuki1 (AUTHOR), Yamamoto, Hirotsugu2 (AUTHOR)
Source: Optical Review. Feb2026, Vol. 33 Issue 1, p142-154. 13p.
Subjects: Multilayered thin films, Diffractive optical elements, Lighting, Luminous flux, Optical films, Pareto analysis, Energy consumption of lighting
Abstract: Design of a novel, alignment-free, ultra-thin multi-layered diffuser film for mini-LED backlight unit and other LED general lighting applications is presented. The ultra-thin diffuser film is inserted between the blue mini-LED array and the QD film for the backlight application. The diffuser film consists of two optical elements, a diffractive layer (DOE or a microprism-array) faced on the mini-LED side and a dielectric multi-layer stack faced on the QD film side. The diffractive layer optimally adjusts the incident angle of the lights emitted out of the mini-LED and the dielectric multi-layer stack acts as an angle-selective filter. The innovative combination of the two optical elements realizes distinct improvement of lighting efficiency and illuminance uniformity without alignment of the diffuser film with the mini-LED array. We also demonstrate the optimal design of the diffuser film using Pareto solution analysis. This method is flexibly applicable to optimally designing not only mini-LED backlight units but also various general lighting applications. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Design of a novel, alignment-free, ultra-thin multi-layered diffuser film for mini-LED backlight unit and other LED general lighting applications is presented. The ultra-thin diffuser film is inserted between the blue mini-LED array and the QD film for the backlight application. The diffuser film consists of two optical elements, a diffractive layer (DOE or a microprism-array) faced on the mini-LED side and a dielectric multi-layer stack faced on the QD film side. The diffractive layer optimally adjusts the incident angle of the lights emitted out of the mini-LED and the dielectric multi-layer stack acts as an angle-selective filter. The innovative combination of the two optical elements realizes distinct improvement of lighting efficiency and illuminance uniformity without alignment of the diffuser film with the mini-LED array. We also demonstrate the optimal design of the diffuser film using Pareto solution analysis. This method is flexibly applicable to optimally designing not only mini-LED backlight units but also various general lighting applications. [ABSTRACT FROM AUTHOR]
ISSN:13406000
DOI:10.1007/s10043-025-01026-2