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Proceedings Paper

Foveated display by laser scanning
Author(s): R. Gabai; G. Yearim; M. Yehiel; G. Cahana; A. Baram; M. Naftali
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Paper Abstract

This work presents a novel approach for generating a foveated image with a scanning laser. Foveated image is desired especially in near-eye displays such as AR/VR displays. No display system as of today could provide an image with a sufficiently high field of view while maintaining a retina level resolution around the desired fixation point. When projecting a foveated rasterized image one has to manipulate the density of pixels within a line and the density of the lines. Also, different pixels density usually creates different light intensity.

Usually, obtaining a foveated image is carried by super-imposing of at least two images, a low-resolution wide field of view with a high-resolution narrow field of view. This is normally done by combing two or more light sources or combing two display panels optically. In the presented work, a single light source is being used to project a foveated image. The system is based on a MEMS scanning mirror with a dedicated controller. Precise motion control of the mirror along with the presented method allows manipulating the location of each pixel. A pixel location is a timed light pulse synchronized with the mirror orientation. The algorithm times the pixels achieving a dense area of pixels around the desired fixation point and sparse area of pixels elsewhere. The pixels locations may vary for each frame. Moreover, compensation to the different light intensities within the frame is applied. The presented algorithm allows projecting a foveated image by a laser scanning without the tangle of sophisticated hardware.

Paper Details

Date Published: 28 February 2020
PDF: 7 pages
Proc. SPIE 11293, MOEMS and Miniaturized Systems XIX, 112930G (28 February 2020); doi: 10.1117/12.2544755
Show Author Affiliations
R. Gabai, Maradin Ltd. (Israel)
G. Yearim, Maradin Ltd. (Israel)
M. Yehiel, Maradin Ltd. (Israel)
G. Cahana, Maradin Ltd. (Israel)
A. Baram, Maradin Ltd. (Israel)
M. Naftali, Maradin Ltd. (Israel)

Published in SPIE Proceedings Vol. 11293:
MOEMS and Miniaturized Systems XIX
Wibool Piyawattanametha; Yong-Hwa Park; Hans Zappe, Editor(s)

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