Driving apparatus and method for light emitting diode display

A driving apparatus for a light emitting device, which has an adjustable input reference voltage, the driving apparatus comprising:

• a driving transistor, having a gate connected to a first node;
• the light emitting device, serially connected to the driving transistor at a second node, so as to constitute a light emitting path, wherein, the light emitting path is connected in between a system high voltage and a system low voltage, such that when the driving transistor is activated, the system high voltage drives the light emitting device to make it emit the light;
• a maintain capacitor, connected to the first node and to the system high voltage, a first transistor, having a gate connected to a scanning line, a source connected to a data line, and a drain connected to a third node;
• a second transistor, having a gate connected to the scanning line, a source connected to the third node, and a drain connected to the first node;
• a third transistor, having a gate connected to the second node, a source connected to an adjustable reference voltage, and a drain connected to the third node.