Integration of prism sheet on quantum dot film with bridge patterns to enhance luminance of LED backlight unit

Se Eun Kim, Jae Yong Lee, Min Ho Shin, Hyo Jun Kim, Young Joo Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An integrated prism sheet on quantum dot (QD) film with bridge patterns has been proposed to increase the optical efficiency of an LED backlight unit. The bridge patterns were designed, such that they not only extract the light trapped in a QD film but also change the optical path effectively toward the vertical direction. We verified our design concept and geometrical parameters by optical simulation, and fabricated the integrated optical sheet using a lithography and UV imprinting process. The simulation results show the luminance enhancement of 33.6% after applying the bridge patterns while keeping the same Commission Internationale de l'Éclairage (CIE) after careful controlling the concentration of QDs. The enhancement of luminance toward the vertical directionwas also confirmed experimentally after the fabrication of an integrated prism sheet on a QD enhancement film.

Original languageEnglish
Article number7831450
Pages (from-to)1153-1160
Number of pages8
JournalIEEE Transactions on Electron Devices
Volume64
Issue number3
DOIs
Publication statusPublished - 2017 Mar

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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