Array of leds with active pull down shadow canceling circuitry

Details Array of leds with active pull down shadow canceling circuitry Array of leds with active pull down shadow canceling circuitry

1996-11-12

1999-07-13

Mengistu, Amare

Computer graphics processing and selective visual display system

Plural physical display element control system

Segmented display elements

345 45, 345 46, 345 76, 345 82, G09G 306

Patent

active

059233087

ABSTRACT:
An array of OEDs is arranged in rows and columns with a plurality of row buses and a plurality of column buses. Each of the OEDs has a first terminal coupled to an associated row bus and a second terminal coupled to an associated column bus. A switching circuit is connected to a shadow canceling row bus of the plurality of row buses. The switching circuit is constructed to receive a shadow canceling signal on a terminal thereof and to connect the shadow canceling row bus to a pull down potential in response to the shadow canceling signal, whereby all of the OEDs in the array, other than those associated with the shadow canceling row bus, are coupled to the pull down potential and discharged.

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patent: 5684365 (1997-11-01), Tang et al.
patent: 5688551 (1997-11-01), Littman et al.

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