Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-01-07
1999-08-31
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
G09G 322
Patent
active
059459689
ABSTRACT:
A current controlled matrix addressable display includes a charging transistor, a driving transistor and a switching transistor that control current flow to a light-emitting assembly. The control circuit is driven by a row signal, a column signal and a clocking signal. The column signal is a combination of an image component and a pulsed charging component. The image component establishes a gate voltage that is trapped at the gate of the charging transistor by the switching transistor in response to the row signal. The clocking signal and the charging component form pulse pairs that transfer charge from a column line to a common node and then from the common node to the light-emitting assembly. The intensity of light is controlled by the voltage difference between the image component and the voltage of the clocking signal. Additionally, the intensity of emitted light can be controlled by controlling the number of pulse pairs in a return interval during which the pulse pairs arrive.
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Frenel Vanel
Hjerpe Richard A.
Micro)n Technology, Inc.
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