Design and Pareto solution analysis of novel alignment-free ultra-thin multi-layered diffuser film applied for mini-LED backlighting and general lighting applications
Year: 2026
Type: article
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.
Source: Optical Review
Authors: Marii Nishikawa, Yukio Taniguchi, Masahiro Goto, Yasuyuki Ohyagi, Yoshihiro Kanai, Masayuki Sekido, Hirotsugu Yamamoto
Institutions: Dai Nippon Printing (Japan), Utsunomiya University
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,290
OpenAlex ID: W7124769303