Drive circuit with constant current

Details Drive circuit with constant current Drive circuit with constant current

1975-10-28

1977-08-30

Smith, Jr., David

Electrical transmission or interconnection systems

Miscellaneous systems

For particular load device

315169TV, H02V 902

Patent

active

040456838

ABSTRACT:
A constant current drive circuit that can be driven directly from the output of a shift register which can find use, for example, in maintaining a constant current through a controlled device such as one or more light emitting diodes (LEDs) to ensure uniform brightness throughout a display surface that includes a plurality of LEDs.

REFERENCES:
patent: 3740570 (1973-06-01), Kaelin et al.
patent: 3754181 (1973-08-01), Kreitz et al.
patent: 3770890 (1973-11-01), Winkler
patent: 3821596 (1974-06-01), Leuck
patent: 3886465 (1975-05-01), Mattfeld
"Monolithic ICS Drive Plasma Displays," Electronic Engineering, Jan. 1974, p. 15.

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