Optical input with electrical readout memory mosaic

Details Optical input with electrical readout memory mosaic Optical input with electrical readout memory mosaic

1983-07-28

1986-03-11

Popek, Joseph A.

Static information storage and retrieval

Radiant energy

Semiconductive

365215, G11C 1134

Patent

active

045758204

ABSTRACT:
A large scale integrated circuit device such as a random access memory or a read only memory has its top cover removed and information is read into the device in the form of radiation which is selectively applied to the exposed surface of the device. The radiation is of suitable frequency and intensity as to be capable of placing any of the individual devices within the array to a given logic state. The entire device is electrically read out in the normal fashion. The radiation may be modulated in any desired manner and can, for example, be modulated by a transparency containing the desired input information. Gray shades are obtained by employing a plurality of large scale integrated devices which are identical to one another and which receive the same radiation distribution with a different attenuation for each of the devices. The electrical readout process can then compare the state of respective identical devices within each array to determine gray shades.

REFERENCES:
patent: 3925767 (1975-12-01), Witteles et al.
patent: 4362805 (1982-12-01), Landsman

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