Display device, method of driving display device and electronic apparatus
View Patent ↗A display device includes a pixel array unit in which pixels are arranged, each pixel including a light emitting unit, a writing transistor that writes a video signal, a driving transistor that drives the light emitting unit based on the video signal written by the writing transistor, and a switching transistor that applies a fixed potential to one terminal of the light emitting unit, and a driving unit that causes the light emitting unit to enter a light extinction state by writing a voltage causing the driving transistor to enter a non-conduction state to a gate electrode of the driving transistor.
1. A display device comprising:
a pixel array unit in which pixels are arranged, each pixel including a light emitting unit, a writing transistor that writes a video signal, a driving transistor that drives the light emitting unit based on the video signal written by the writing transistor, and a switching transistor that applies a fixed potential to one terminal of the light emitting unit; and
a driving unit that causes the light emitting unit to enter a light extinction state by writing a voltage causing the driving transistor to enter a non-conduction state to a gate electrode of the driving transistor,
wherein the driving unit applies a fixed potential to a source electrode of the driving transistor via the switching transistor in a state in which the voltage causing the driving transistor to enter the non-conduction state is written to the gate electrode of the driving transistor.
2. The display device according to claim 1 ,
wherein each pixel of the pixel array unit has a function of correcting a threshold voltage of the driving transistor.
3. The display device according to claim 2 ,
wherein the voltage causing the driving transistor to enter the non-conduction state is a reference voltage that is used when the threshold voltage is corrected.
4. The display device according to claim 2 ,
wherein the driving unit writes the voltage causing the driving transistor to enter the non-conduction state to a holding capacitor.
5. The display device according to claim 2 ,
wherein, when a threshold voltage of the writing transistor is V th _ WS , the threshold voltage of the driving transistor is V th _ Drv , and the fixed potential applied to a source electrode of the driving transistor is V ss ,
a voltage causing the writing transistor to enter a non-conduction state is set to be lower than (V th _ WS +V th _ Drv +V ss ) and
the driving unit applies the fixed potential to the source electrode of the driving transistor via the switching transistor before writing a reference voltage that is used when the threshold voltage of the driving transistor is corrected to the gate electrode of the driving transistor.
6. The display device according to claim 1 ,
wherein the driving unit writes a voltage lower than the voltage causing the driving transistor to enter the non-conduction state to the gate electrode of the driving transistor when the switching transistor is in a conduction state.
7. The display device according to claim 6 ,
wherein, when a threshold voltage of the driving transistor is V th _ Drv and the fixed potential applied to the source electrode of the driving transistor is V ss ,
the voltage that is written to the gate electrode of the driving transistor in the conduction state of the switching transistor is lower than (V th _ Drv +V ss ).
8. The display device according to claim 7 ,
wherein the voltage that is written to the gate electrode of the driving transistor in the conduction state of the switching transistor is lower than a reference voltage that is used when the threshold voltage of the driving transistor is corrected.
9. The display device according to claim 8 ,
wherein the driving unit writes the reference voltage that is used when the threshold voltage of the driving transistor is corrected and a voltage lower than the reference voltage to the gate electrode of the driving transistor via the writing transistor.
10. A method of driving a display device in which pixels are arranged, each pixel including a light emitting unit, a writing transistor that writes a video signal, a driving transistor that drives the light emitting unit based on the video signal written by the writing transistor, and a switching transistor that applies a fixed potential to one terminal of the light emitting unit, the method comprising:
writing a voltage causing the driving transistor to enter a non-conduction state to a gate electrode of the driving transistor to cause the light emitting unit to enter a light extinction state in driving the display device; and
applying the fixed potential to the source electrode of the driving transistor via the switching transistor in a state in which the voltage causing the driving transistor to enter the non-conduction state is written to the gate electrode of the driving transistor.
11. An electronic apparatus with a display device, the display device comprising:
a pixel array unit in which pixels are arranged, each pixel including a light emitting unit, a writing transistor that writes a video signal, a driving transistor that drives the light emitting unit based on the video signal written by the writing transistor, and a switching transistor that applies a fixed potential to one terminal of the light emitting unit; and
a driving unit that causes the light emitting unit to enter a light extinction state by writing a voltage causing the driving transistor to enter a non-conduction state to a gate electrode of the driving transistor,
wherein the driving unit applies a fixed potential to a source electrode of the driving transistor via the switching transistor in a state in which the voltage causing the driving transistor to enter the non-conduction state is written to the gate electrode of the driving transistor.