Open AccessHighly efficient full-color display based on blue LED backlight and electrochromic light-valve coupled with front-emitting phosphors
Author(s) -
Jeong Rok Oh,
Hoo Keun Park,
Ji Hye Oh,
Taejoon Kouh,
Young Rag
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.016022
Subject(s) - backlight , liquid crystal display , phosphor , shutter , optoelectronics , materials science , optics , electrochromism , blue light , prussian blue , display device , light emitting diode , computer science , electrode , physics , quantum mechanics , electrochemistry , operating system
We report a novel full-color display based on the generation of full-color by blue light approach, so called color-by-blue display. This newly proposed color-by-blue light-valve display combines a blue backlight excitation source, a blue light-valve shutter, and front-emitting phosphor pixels. Careful evaluation shows that the detailed display characteristics as well as excellent cycling durability under a low operation voltage of 3 V easily satisfy the requirements for the current display application. Also, we would like to emphasize that the proposed method shows a conversion efficiency of 20%, surpassing the value (≈5%) seen in the typical liquid crystal displays. Although the switching response reported here is slower than in a commercial display module due to the solution-phase electrochromic nature of the shutter used, a response time close to that of a liquid crystal display is highly feasible, as we suggest.