Current-supplying integrated circuit

Details Current-supplying integrated circuit Current-supplying integrated circuit

1992-02-18

1994-05-03

Brier, Jeffery

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

358296, 346107R, 345 82, G09G 300

Patent

active

053091515

ABSTRACT:
A current supplying integrated circuit which has multi-output for controlling current supply from a current source to a plurality of elements to be driven, such as LEDs, and comprises a plurality of switching devices for controllably supplying the current from the source to the corresponding elements to be driven wherein each of the switching devices has N unit switching elements arranged to be connected in parallel to each other to form a current synthesizing circuit. The unit switching elements have substantially the same current capacity. Each of the elements to be driven, such as LEDs, is supplied with a current whose intensity can be varied by N degrees by the synthesizing circuit. By varying the current intensity supplied to each of the elements, the unevenness in properties among them can be avoided or suppressed in an effective and simplified manner.

REFERENCES:
patent: 3947840 (1976-03-01), Craford et al.
patent: 4607248 (1986-08-01), Botka et al.
patent: 4897639 (1990-01-01), Kanayama
patent: 4962375 (1990-10-01), Hirane et al.

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