Image display device with element driving device for matrix drive of multiple active elements
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United States of America Patent
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-
Jul 18, 2000
Grant Date -
N/A
app pub date -
Mar 25, 1999
filing date -
Mar 31, 1998
priority date (Note) -
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Abstract
An image display device has multiple active elements arranged therein, such as an organic EL (Electro-Luminescence) element to matrix-drives these active elements. In the image display device, when a switching element is turned on with a control signal applied to a control electrode, a control current on a signal electrode is converted to a control voltage by a second transistor, held in a holding capacitor, and applied to a gate electrode of a first transistor. Thus, the signal electrode is applied with the control current, not with a control voltage, for controlling the operation of the active element. A drive voltage to be applied to a power supply electrode is converted to a drive current and supplied to the active element.
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