Electrical display elements for displaying multiple different co

Details Electrical display elements for displaying multiple different co Electrical display elements for displaying multiple different co

1994-07-06

1997-09-09

Powell, Mark R.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

G08B 538

Patent

active

056661290

ABSTRACT:
A pair of electrical display elements, LEDs, is driven by a three-state buffer driver circuit. The LEDs have associated current-limiting resistors. The driver circuit applies different selected voltage levels at different selected predetermined frequencies to the LEDs. By having two predetermined frequencies to a pair of LEDs, there can be exhibited at least five different display conditions from the pair of LEDs.

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