Method of driving a light emitting device
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United States of America Patent
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Nov 4, 2008
Grant Date -
Oct 30, 2003
app pub date -
Apr 30, 2003
filing date -
Apr 30, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is characterized in that a transistor with its L/W set to 10 or larger is employed, and that |V.sub.DS| of the transistor is set equal to or larger than 1 V and equal to or less than |V.sub.GS-V.sub.th|. The transistor is used as a resistor so that the resistance of a light emitting element can be held by the transistor. This slows down an increase in internal resistance of the light emitting element and the resultant current value reduction. Accordingly, a change with time in light emission luminance is reduced and the reliability is improved.
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