Electroluminescent display devices
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United States of America Patent
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Jun 30, 2009
Grant Date -
Mar 30, 2006
app pub date -
Sep 15, 2003
filing date -
Oct 8, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An active matrix electroluminescent display device has a current sampling resistor within each pixel in series with the display element. A feedback signal represents the voltage drop across the current sampling resistor and the pixel drive signals are modified in dependence on the feedback signal to control the current driven through the display element. In this way, threshold compensation is provided, whilst enabling a single voltage-driven drive transistor to be employed.
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