| 摘要 |
The invention provides a method that enables the organic light emitting diodes in a displayer to show multiple gray levels. The method is using power supply circuits, which are electrically connected to each data line in the displayer, to control each switch in the power supply circuits so as to provide a composite current to its connected data line in order to drive each organic light emitting diode. At this time, the organic light emitting diodes will show multiple gray levels due to different current values.
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