Circuit for driving light emitting element and...

Details Circuit for driving light emitting element and... Circuit for driving light emitting element and...

2004-09-03

2008-09-23

Liang, Regina (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S082000

Reexamination Certificate

active

07427970

ABSTRACT:
A current-control-type light emitting display in which a reverse current can be supplied to a light emitting element without requiring a negative power supply and without being passed through a forward drive section. A first electrode of the light emitting element is connected via a first switching device to a second power supply line set to 0 V, and is connected to a drive section via a second switching device. A second electrode of the light emitting element is connected to a third power supply line selectively connected to a voltage source from which an arbitrary positive voltage is supplied or another voltage source from which 0 V is supplied. A reverse current is supplied to the light emitting device by setting the potential on the first electrode of the light emitting element equal to the potential on the second power supply line and by setting the potential on the second electrode equal to the potential on the third power supply line from which an arbitrary positive voltage is supplied.

REFERENCES:
patent: 7176857 (2007-02-01), Osame et al.
patent: 2002-169509 (2002-06-01), None
patent: 2003-122304 (2003-04-01), None

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