Title :
LED-based micro display for an intraocular vision aid (IOVA)
Author :
Puttjer, D. ; Pramassing, F. ; Buss, Rich ; Jager, D.
Author_Institution :
ZHO-Dept. of Optoelectronics, Gerhard Mercator Univ., Duisburg, Germany
Abstract :
A micro display for an intraocular vision aid (IOVA) projecting an image of the environment onto the retina is presented. The display comprises an image of an array made out of single LED pixels. It is connected to a CMOS driver circuit using a flip-chip technique. Since micro lenses have to be integrated into the substrate material for proper image projection onto the retina the generated light has to pass the substrate. Thus, only semiconductors with adequate large band gap energies are suitable. This paper discusses the principle of GaAsP material systems for an LED-based micro display applied to an implantable vision aid.
Keywords :
CMOS analogue integrated circuits; III-V semiconductors; LED displays; driver circuits; eye; flip-chip devices; gallium arsenide; handicapped aids; integrated optoelectronics; microdisplays; microlenses; sensory aids; vision defects; CMOS driver circuit; GaAsP material systems; IOVA; LED-based micro display; array image; artificial vision; blindness; environment; flip-chip technique; generated light; image; image projection; implantable vision aid; intraocular vision aid; large band gap energies; micro lenses; opaque cornea; retina; semiconductors; single LED pixels; substrate material; Displays; Driver circuits; Lenses; Light emitting diodes; Optical materials; Photonic band gap; Pixel; Retina; Semiconductor materials; Substrates;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1019568
