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Proceedings Paper

ePaper
Author(s): Dhananjay V. Gadre; Vasudev Lal; Sulochana Dhar; Anshul Kumar
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Paper Abstract

LEDs can be used as light emitters as well as detectors. It is known that like any PN junction, an LED too can be modeled as a capacitor in parallel with a light dependent current source [4]. 'ePaper' exploits this property of LEDs. 'ePaper' is an LED based graphic tablet which allows a user to write or sketch on an inexpensive hand held device. Multiple pages can be saved on the device which can be scrolled through and uploaded to a computer as bitmaps. ePaper is designed to be scalable to any desired dimension.

Paper Details

Date Published: 25 February 2008
PDF: 7 pages
Proc. SPIE 6910, Light-Emitting Diodes: Research, Manufacturing, and Applications XII, 69100W (25 February 2008); doi: 10.1117/12.763222
Show Author Affiliations
Dhananjay V. Gadre, Univ. of Delhi (India)
Vasudev Lal, Univ. of Delhi (India)
Sulochana Dhar, Univ. of Delhi (India)
Anshul Kumar, Indian Institute of Technology, Delhi (India)


Published in SPIE Proceedings Vol. 6910:
Light-Emitting Diodes: Research, Manufacturing, and Applications XII
Klaus P. Streubel; Heonsu Jeon, Editor(s)

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