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5‐2: A Novel Diffractive Backlight Concept for Mobile Displays
Author(s) -
Kimmel Jyrki,
Levola Tapani,
Saarikko Pasi,
Bergquist Johan
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785221
Subject(s) - backlight , liquid crystal display , computer science , power (physics) , grating , pixel , diffraction grating , computer graphics (images) , optics , computer vision , physics , quantum mechanics , operating system
Power efficiency demands on mobile communication device displays have become severe with the emergence of full video capable phones and mobile telephony services such as the third‐generation networks (3G). One way of reducing the power dissipation of a mobile liquid‐crystal display (LCD) is to efficiently distribute and outcouple the light available in the backlight unit (BLU) to direct the light in a spectrum‐specific fashion through the respective color pixels. This paper describes a diffractive optics approach to realize a novel backlight unit. A model grating structure was fabricated and the outcoupled distribution of light was studied. The results verify that the new BLU concept based on an array of spectrum‐specific gratings is possible.