IMAGE DISPLAY APPARATUS
Active matrix circuitry includes a light emission selection element is disposed between a source electrode of a driver element and an anode of a light emitting element. By turning the light emission selection element off, an electric current of the driver element can be turned off, whereby the threshold voltage of the driver element can be stored in the driver characteristics storage capacitor.
1 . An active matrix apparatus comprising:
a driver element having a drain electrode connected to a positive power source line;
a light emission selection element having a drain electrode connected to a source electrode of the driver element and a gate electrode connected to a light emission control line;
a light emitting element having an anode electrode connected to a source electrode of the light emission selection element and a cathode electrode connected to a negative power source line, the light emitting element capable of emitting light when an electric current is directed therethrough;
a signal selection element having a drain electrode or a source electrode connected to a signal line which transmits a brightness signal and a gate electrode connected to a scan line;
a driver characteristics storage capacitor having a first electrode connected to a gate electrode of the driver element and a second electrode connected to the source electrode or the drain electrode of the signal selection element; and
a first switching element having one of a drain electrode or a source electrode thereof connected to the drain electrode of the driver element, the other of the source electrode or the drain electrode thereof connected to the gate electrode of the drive element, and a gate electrode connected to a reset line.
2 . An active matrix apparatus according to claim 1 , comprising:
a brightness voltage storage capacitor having a first electrode connected to the positive power source line and a second electrode connected to the second electrode of the driver characteristics storage capacitor; and
a second switching element having one of a source electrode or a drain electrode connected to the second electrode of the brightness voltage storage capacitor, the other of the drain electrode or the source electrode connected to the source electrode of the driver element, and a gate electrode connected to the reset line.
3 . An active matrix apparatus according to claim 1 , wherein the source electrode of the driver element is connected to the second electrode of the driver characteristics storage capacitor.
4 . An active matrix apparatus according to claim 1 , wherein:
in a state where the first switching element is turned on by the reset line and the light emission selection element is turned off, a threshold voltage of the driver element is generated at the second electrode of the driver characteristics storage capacitor.
5 . An active matrix apparatus according to claim 4 , wherein
the scan line and the reset line are driven with an identical waveform.
6 . An active matrix apparatus according to claim 1 , wherein the driver element is a thin film transistor.
7 . An active matrix apparatus according to claim 6 , wherein:
the thin film transistor is an amorphous silicon transistor.
8 . An active matrix apparatus according to claim 1 , wherein:
one or more light emission selection elements are connected to the source electrode of the driver element,
the light emitting element is connected to each of the one or more light emission selection elements, and
an electric current flowing in the driver element is supplied to the one or more light emitting elements.
9 . An active matrix apparatus according to claim 1 , wherein the one or more light emission selection elements are connected to different light emission control lines, respectively, and are turned on at different times.
10 . An active matrix apparatus according to claim 1 , wherein the light emitting element is an organic electroluminescence element.