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Photologic EXCLUSIVE OR Block

IP.com Disclosure Number: IPCOM000098158D
Original Publication Date: 1960-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Low, PR: AUTHOR

Abstract

Electroluminescent output lamp 1 and photoconductors 2, 3, 4 and 5 combine in an H configuration to perform the EXCLUSIVE OR logical function in response to optical inputs from electroluminescent lamps 6 and 7. Switches 8 and 9 control the input lamps; A.C. generator 10 provides power. The upper drawing is a semischematic, exploded view showing the electrical and optical relationships. The lower drawing illustrates the actual construction.

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Photologic EXCLUSIVE OR Block

Electroluminescent output lamp 1 and photoconductors 2, 3, 4 and 5 combine in an H configuration to perform the EXCLUSIVE OR logical function in response to optical inputs from electroluminescent lamps 6 and 7. Switches 8 and 9 control the input lamps; A.C. generator 10 provides power. The upper drawing is a semischematic, exploded view showing the electrical and optical relationships. The lower drawing illustrates the actual construction.

Output lamp 1, which includes electroluminescent phosphor layer 11, transparent electrode 12 and reflective electrode 13, provides an optical output whenever substantial electrical potential appears across its electrodes. Glass plates 14 provide structural support for the electrodes and photoconductors and for conductors 15 and 16; transparent insulative sealer 17 completes the block. Input lamp 6 illuminates photoconductors 2,and 4; input lamp 7 illuminates photoconductors 3 and 5. Photoconductors 4 and 5 are transparent or dimensioned to prevent masking of photoconductors 2 and 3.

Electrode 12 is at an intermediate point in the resistance divider which extends from ground through generator 10, conductor 15, photoconductor 2, transparent electrode 12, photoconductor 3 back to ground. Electrode 13 is at a similarly intermediate point in the oppositely oriented resistance divider extending from ground through generator 10, conductor 16, transparent photoconductor 5, reflective electrode 13, transparent photoconductor...