Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2005-07-19
2005-07-19
Liang, Regina (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S082000, C345S204000, C315S169300
Reexamination Certificate
active
06919868
ABSTRACT:
A driver circuit comprises a p-channel transistor and an n-channel transistor connected as a complementary pair of transistors to provide analog control of the drive current for a current driven clement, preferably an organic electroluminescent element (OEL element). The transistors, being of opposite channel, compensate, for any variation in threshold voltage ΔVTand therefore provide a drive current to the OEL element which is relatively independent of ΔVT. The complementary pair of transistors can be applied to either voltage driving or current driving pixel driver circuits.
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Liang Regina
Oliff & Berridg,e PLC
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