Electronic clock

Details Electronic clock Electronic clock

1975-03-18

1977-05-31

Jackmon, E. S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307 38, 315169R, 340324M, G04B 1930, H02J 100, H05B 3700, G08B 2300

Patent

active

040261026

ABSTRACT:
A numerical display unit formed by light emitting diode segments, is directly driven by the field effect transistors associated with an integrated timer circuit chip. A DC driving current is supplied to common electrodes of the transistors while the light emitting diodes are interconnected in a corresponding common electrode arrangement so that the same driving current is conducted through each of the transistors and associated light emitting diodes.

REFERENCES:
patent: 3388292 (1968-06-01), Burns
patent: 3443151 (1969-05-01), Myers et al.
patent: 3630015 (1971-12-01), Lehovel
patent: 3655442 (1972-05-01), Brooks
patent: 3666960 (1972-05-01), Dawson
patent: 3672155 (1972-06-01), Bergey et al.
patent: 3755679 (1973-08-01), Otsuka
patent: 3755697 (1973-08-01), Miller
patent: 3759031 (1973-09-01), McCullough et al.
patent: 3813533 (1974-05-01), Cone et al.
patent: 3823551 (1974-07-01), Riehl
patent: 3878406 (1975-04-01), Beneking
Schlig, Mos Current Driver for Light Emitting Diodes, IBM Technical Disclosure Bulletin, vol. 15, No. 2, 1972, pp. 498, 499.

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