Patent
1975-08-11
1976-10-19
Griffin, Donald A.
G03B 1704
Patent
active
039874591
ABSTRACT:
A solid state electro optical symbol emitting and symbol recognition device employing a source of collimated and parallel light for projecting an image, a symbol matrix of photographic film containing the symbols such as alphanumeric font that is to be projected, displayed or recognized by comparing it to a symbol of established equivalence, a liquid crystal symbol gate under the control of a central processor, a symbol display unit capable of receiving a symbol and projecting it to a multiplicity of positions on its output side and to a recognition unit, a second liquid crystal symbol gate under the control of a central processor and an output medium such as a xerographic printer, a light sensitive printing plate or a display screen. In addition the device may contain a recognition unit capable of comparing a symbol emitted by the device as previously described with a symbol emitted from its symbol matrix to establish their congruency and consequently the identity of the symbol read.
REFERENCES:
patent: 2699101 (1955-01-01), Ferguson et al.
patent: 3074328 (1963-01-01), Rossetto et al.
patent: 3499112 (1970-03-01), Heilmeier et al.
patent: 3710698 (1973-01-01), Sinnott et al.
patent: 3824604 (1974-07-01), Stein
patent: 3836917 (1974-09-01), Mee
I.B.M. Technical Disclosure Bulletin Character Checker, Cobb, vol. 11 No. 10, 3/1969, pp. 1357 & 1358.
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