Open AccessProjection screen reflectance control for high contrast display using photochromic compounds and UV LEDs
Author(s) -
Daisuke Iwai,
Satoshi Takeda,
Naoto Hino,
Kosuke Sato
Publication year - 2014
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.22.013492
Subject(s) - optics , projection (relational algebra) , projector , contrast (vision) , photochromism , visible spectrum , light emitting diode , contrast ratio , materials science , reflection (computer programming) , diffuse reflection , optoelectronics , sunlight , light reflection , computer science , physics , nanotechnology , algorithm , programming language
This paper presents the first proof-of-concept implementation and the principle that realizes a projection display whose contrast does not decrease even with existing inter-reflection of projection light or environmental light. We propose the use of photochromic compounds (PhC) to control reflectance of a projection surface. PhC changes color chemically when exposed to UV light. A PhC is applied to a surface to control its reflectance by radiating UV light from a UV-LED array. An image is projected from a visible projector onto the surface to boost the contrast. The proof-of-concept experiment shows that the prototype system achieves approximately three times higher contrast than a projection-only system under natural light.