Telegraphy – Systems – Simplex-reversing periodic
Patent
1975-09-04
1976-11-23
Griffin, Robert L.
Telegraphy
Systems
Simplex-reversing periodic
178 6, 178 68, 178DIG2, 178DIG32, H04M 310
Patent
active
039938654
ABSTRACT:
A hand-held scanning device is moved across a line of print and generates a two-dimensional scan of the print. A line array of photodiodes performs the scan in one direction and the movement across the paper generates strobe pulses each of which allows one scan of the array to be passed to a store from which a domestic T.V. set can be fed to provide an enlarged display. It may be used as a reading aid for partially sighted people or as an input device for an OCR machine.
In the case of a reading aid using a T.V.-type raster display, the store is organized to allow new array scans to be written in at a variable rate dependent on hand motion while the contents of the store are read out repetitively and non-destructively at a constant line-by-line rate suitable for the T.V. raster.
REFERENCES:
patent: 3346692 (1967-10-01), Garfield
patent: 3541248 (1970-11-01), Young
J. C. Bliss, "Optical-to-Tactile Image Conversion for the Blind," 3-1970, pp. 58-65, IEEE. Trans. on Man-Machine Systems.
J. S. Brugler, "A Reading Eye for the Blind," Feb. 1971, pp. 18-22, Optical Spectra.
J. C. Tachzer, "Visual Word Reading," 3-70, pp. 44-53, IEEE Trans. on Man-Machine Systems.
Browne Arthur
Witts Francis John
Coles Edward L.
Griffin Robert L.
McGlynn Daniel R.
Trifari Frank R.
U.S. Philips Corporation
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