Display device for decreasing capacitance voltage dependence
A plurality of pixel circuits included in a display device each includes: a drive transistor; a capacitor connected to a gate electrode and a source electrode of the drive transistor; a light-emitting element which is driven by the drive transistor; a write transistor having a gate electrode connected to a write control line for transmitting a write signal, one of a drain electrode and a source electrode connected to a data line for transmitting a data voltage corresponding to luminance, and the other of the drain electrode and the source electrode connected to the gate electrode of the drive transistor; and a compensation transistor having a gate electrode connected to the data line, and at least one of a drain electrode and a source electrode connected to the write control line, the compensation transistor being of same conductivity type as the write transistor.
1. A display device comprising a display unit including a plurality of pixel circuits,
wherein each of the plurality of pixel circuits includes:
a drive transistor having a gate electrode and a source electrode;
a capacitor connected to the gate electrode and the source electrode of the drive transistor;
a light-emitting element which is driven by the drive transistor;
a write transistor having a gate electrode connected to a write control line for transmitting a write signal, a drain electrode connected to a data line for transmitting a data voltage corresponding to luminance, and a source electrode connected to the gate electrode of the drive transistor; and
a compensation transistor having a gate electrode that is directly connected to the data line, and a pair of a drain electrode and a source electrode that are connected to the write control line, the compensation transistor being of same conductivity type as the write transistor.
2. The display device according to claim 1 ,
wherein the write transistor and the compensation transistor are metal-oxide semiconductor field-effect transistors having same channel length, same channel width, and same gate insulating film thickness.
3. The display device according to claim 1 ,
wherein the write transistor and the compensation transistor are metal-oxide semiconductor field-effect transistors having same gate electrode material, same gate insulating film material, and same channel semiconductor layer material.
4. The display device according to claim 1 ,
wherein a characteristic of a parasitic capacitance of the write transistor with respect to gate-source voltage and a characteristic of a parasitic capacitance of the compensation transistor with respect to the gate-source voltage are mutually the same.
5. A display device comprising a display unit including a plurality of pixel circuits,
wherein each of the plurality of pixel circuits includes:
a drive transistor having a gate electrode and a source electrode;
a capacitor connected to the gate electrode and the source electrode of the drive transistor;
a light-emitting element which is driven by the drive transistor;
a write transistor having a gate electrode connected to a write control line for transmitting a write signal, a source electrode connected to a data line for transmitting a data voltage corresponding to luminance, and a drain electrode connected to the gate electrode of the drive transistor; and
a compensation transistor having a gate electrode that is directly connected to the data line, and a pair of a drain electrode and a source electrode that are connected to the write control line, the compensation transistor being of same conductivity type as the write transistor.
6. The display device according to claim 5 ,
wherein the write transistor and the compensation transistor are metal-oxide semiconductor field-effect transistors having same channel length, same channel width, and same gate insulating film thickness.
7. The display device according to claim 5 ,
wherein the write transistor and the compensation transistor are metal-oxide semiconductor field-effect transistors having same gate electrode material, same gate insulating film material, and same channel semiconductor layer material.
8. The display device according to claim 5 ,
wherein a characteristic of a parasitic capacitance of the write transistor with respect to gate-source voltage and a characteristic of a parasitic capacitance of the compensation transistor with respect to the gate-source voltage are mutually the same.