Pixel circuit for a current-driven light emitting element
Pixel circuit 210 includes a current programming circuit 240 and voltage programming transistors 251 and 252 . In order to set the tone of the light emission from the organic EL element 220 , the first and second voltage programming transistors 251 and 252 are set to the OFF and ON state, respectively, and voltage programming is carried out using a voltage signal Vout. Next, the states of the first and second voltage programming transistors 251 and 252 are switched, and current programming is carried out using a current signal Iout.
1. An electronic device comprising:
a plurality of scanning lines;
a plurality of data lines;
a plurality of electronic circuits disposed at intersections of the plurality of scanning lines and the plurality of data lines, each of the plurality of electronic circuits including a light emission element, a driving transistor that controls a driving current level of a driving current that is supplied to the light emission element, and a capacitor coupled to a gate of the driving transistor, the driving current level of the driving current passing through the driving transistor and the light emission element being determined by a charge stored in the capacitor;
a current generating circuit that generates a current signal supplied to the plurality of electronic circuits;
a voltage generating circuit that generates a voltage signal, the voltage signal being not supplied to the current generating circuit but supplied to the plurality of data lines; and
the plurality of data lines being precharged by the voltage signal having a plurality of voltage signal levels, each of the plurality of voltage signal levels corresponding to a light emission level of the light emission element.
2. The electronic device according to claim 1 ,
the plurality of electronic circuits being precharged by the voltage signal.
3. The electronic device according to claim 1 , each of the plurality of data lines comprising:
a first sub-data line; and
a second sub-data line,
the current signal being supplied to each one of the electronic circuits through the first sub-data line, and
the voltage signal being supplied to each one of the electronic circuits through the second sub-data line.
4. The electronic device according to claim 1 , wherein each of the plurality of scanning lines comprises a plurality of sub-scanning lines.
5. The electronic device according to claim 1 , wherein each of the plurality of scanning lines comprises three sub-scanning lines.
6. An electronic device, comprising:
a plurality of scanning lines;
a plurality of data lines;
a plurality of electronic circuits disposed at intersections of the plurality of scanning lines and the plurality of data lines, each of the plurality of electronic circuits including a light emission element, a driving transistor that controls a driving current level of a driving current that is supplied to the light emission element, and a capacitor coupled to a gate of the driving transistor, the driving current level of the driving current passing through the driving transistor and the light emission element being determined by a charge stored in the capacitor;
a current generating circuit that generates a current signal supplied to the plurality of electronic circuits;
a voltage generating circuit that generates voltage signals that have a plurality of voltage signal levels, the voltage signals being not supplied to the current generating circuit but supplied to the plurality of data lines; and
precharge operations of at least one of the plurality of data lines and the electronic circuit being performed by the voltage signals having the plurality of voltage signal levels, each of the plurality of voltage signal levels corresponding to a light emission level of the light emission element.
7. The electronic device according to claim 6 ,
the light emission element being set to a state according to each of the plurality of light emission levels, and each of the plurality of signal levels corresponding to a region of the plurality of light emission levels.
8. The electronic device according to claim 6 ,
wherein a conduction state of the driving transistor is set according to the current signal.
9. The electronic circuit according to claim 8 ,
wherein the current signal is supplied to the driving transistor, and the current signal flows through the driving transistor.
10. An electronic apparatus comprising an electronic device, the electronic device comprising:
a plurality of scanning lines;
a plurality of data lines;
a plurality of electronic circuits disposed at intersections of the plurality of scanning lines and the plurality of data lines, each of the plurality of electronic circuits including a light emission element, a driving transistor that controls a driving current level of a driving current that is supplied to the light emission element, and a capacitor coupled to a gate of the driving transistor, the driving current level of the driving current passing through the driving transistor and the light emission element being determined by a charge stored in the capacitor;
a current generating circuit that generates a current signal supplied to the plurality of electronic circuits;
a voltage generating circuit that generates voltage signals that have a plurality of voltage signal levels, the voltage signals being not supplied to the current generating circuit but supplied to the plurality of data lines; and
precharge operations of at least one of the plurality of data lines and the electronic circuit being performed by the voltage signals having a plurality of voltage signal levels, each of the plurality of voltage signal levels corresponding to a light emission level of the light emission element.