Drive circuit and display device

1. A drive circuit comprising:

an input-side inverter circuit and an output-side inverter circuit connected to each other in series and inserted between a high voltage line and a low voltage line,

wherein the output-side inverter circuit includes

a CMOS transistor having a first gate and a second gate, in which a drain is connected to the high voltage line side and a source is connected to an output side of the output-side inverter circuit,

a MOS transistor in which a drain is connected to the low voltage line side and a source is connected to the output side of the output-side inverter circuit, and

a correction circuit to correct a voltage of one or both of the first gate and the second gate of the CMOS transistor;

wherein the correction circuit sets, in one or both of the first gate and second gate of the CMOS transistor, a voltage corresponding to a threshold voltage of the CMOS transistor as an offset;

wherein the correction circuit includes:

a first transistor in which a first of a source or a drain of the first transistor is connected to a first gate side of the CMOS transistor and a second of the source and the drain of the first transistor is connected to the high voltage line side;

a second transistor in which a first of a source or a drain of the second transistor is connected to the first gate side of the CMOS transistor and a second of the source and the drain of the second transistor is connected to the drain side of the CMOS transistor;

a third transistor in which a first of a source or a drain of the third transistor is connected to the drain side of the CMOS transistor and a second of the source and the drain of the third transistor is connected to the low voltage line side; and

a first capacitor in which a first end is connected to the first gate side of the CMOS transistor and a second end is connected to an input side of the input-side inverter circuit, and

the correction circuit sets, in the first gate of the CMOS transistor, a voltage corresponding to the threshold voltage of the CMOS transistor as an offset.

2. A drive circuit comprising:

an input-side inverter circuit and an output-side inverter circuit connected to each other in series and inserted between a high voltage line and a low voltage line,

wherein the output-side inverter circuit includes

a CMOS transistor having a first gate and a second gate, in which a drain is connected to the high voltage line side and a source is connected to an output side of the output-side inverter circuit,

a MOS transistor in which a drain is connected to the low voltage line side and a source is connected to the output side of the output-side inverter circuit, and

a correction circuit to correct a voltage of one or both of the first gate and the second gate of the CMOS transistor;

wherein the correction circuit sets, in one or both of the first gate and second gate of the CMOS transistor, a voltage corresponding to a threshold voltage of the CMOS transistor as an offset; and

wherein the correction circuit includes:

a fourth transistor in which a first of a source or a drain of the fourth transistor is connected to the second gate side of the CMOS transistor and a second of the source and the drain of the fourth transistor is connected to the low voltage line side;

a fifth transistor in which a first of a source or a drain of the fifth transistor is connected to the second gate side of the CMOS transistor and a second of the source and the drain of the fifth transistor is connected to the source side of the CMOS transistor;

a sixth transistor in which a first of a source or a drain of the sixth transistor is connected to the source side of the CMOS transistor and a second of the source and the drain of the sixth transistor is connected to the output side of the output-side inverter circuit; and

a second capacitor in which a first end is connected to the second gate side of the CMOS transistor and a second end is connected to an output side of the input-side inverter circuit.

3. A drive circuit comprising:

an input-side inverter circuit and an output-side inverter circuit connected to each other in series and inserted between a high voltage line and a low voltage line,

wherein the output-side inverter circuit includes

a CMOS transistor having a first gate and a second gate, in which a drain is connected to the high voltage line side and a source is connected to an output side of the output-side inverter circuit,

a MOS transistor in which a drain is connected to the low voltage line side and a source is connected to the output side of the output-side inverter circuit, and

a correction circuit to correct a voltage of one or both of the first gate and the second gate of the CMOS transistor;

wherein the correction circuit sets, in one or both of the first gate and second gate of the CMOS transistor, a voltage corresponding to a threshold voltage of the CMOS transistor as an offset; and

wherein the correction circuit includes:

a fifth transistor in which a first of a source or a drain of the fifth transistor is connected to the second gate side of the CMOS transistor and a second of the source and the drain of the fifth transistor is connected to the source side of the CMOS transistor;

a sixth transistor in which a first of a source or a drain of the sixth transistor is connected to the source side of the CMOS transistor and a second of the source and the drain of the sixth transistor is connected to the output side of the output-side inverter circuit; and

a second capacitor in which a first end is connected to the second gate side of the CMOS transistor and a second end is connected to the output side of the input-side inverter circuit.

4. A display device comprising:

a plurality of pixel circuits arranged in a matrix form; and

a plurality of the driving circuits according to claim 1 ,

wherein each of the pixel circuits includes:

a capacitor;

a switch TFT configured to receive a voltage signal for the capacitor;

a drive TFT responsive to the capacitors; and

a light emitting element responsive to the drive transistor,

and wherein each of the driving circuit is coupled to a corresponding row of the pixel circuits.

5. The display device according to claim 4 , wherein the light emitting element includes an organic EL element.

6. The display device according to claim 4 , wherein an output node of the output-side inverter in each of the driving circuits is connected to a scanning line which is connected to the switch TFT in each of the pixel circuits in the corresponding row.

7. The display device according to claim 4 , wherein each of the pixel circuits are configured to execute a correction operation for correcting a dependence of a driving current for the light emitting element on a characteristic of the drive TFT.

8. The display device according to claim 7 , wherein an output pulse of one of the driving circuits defines duration of the correction operation of a corresponding one of pixel circuits.

9. A display device comprising:

a plurality of pixel circuits arranged in a matrix form; and

a plurality of the driving circuits according to claim 2 ,

wherein each of the pixel circuits includes:

a capacitor;

a switch TFT configured to receive a voltage signal for the capacitor;

a drive TFT responsive to the capacitors; and

a light emitting element responsive to the drive transistor,

and wherein each of the driving circuit is coupled to a corresponding row of the pixel circuits.

10. The display device according to claim 9 , wherein the light emitting element includes an organic EL element.

11. The display device according to claim 9 , wherein an output node of the output-side inverter in each of the driving circuits is connected to a scanning line which is connected to the switch TFT in each of the pixel circuits in the corresponding row.

12. The display device according to claim 9 , wherein each of the pixel circuits are configured to execute a correction operation for correcting a dependence of a driving current for the light emitting element on a characteristic of the drive TFT.

13. The display device according to claim 12 , wherein an output pulse of one of the driving circuits defines duration of the correction operation of a corresponding one of pixel circuits.

14. A display device comprising:

a plurality of pixel circuits arranged in a matrix form; and

a plurality of the driving circuits according to claim 3 ,

wherein each of the pixel circuits includes:

a capacitor;

a switch TFT configured to receive a voltage signal for the capacitor;

a drive TFT responsive to the capacitors; and

a light emitting element responsive to the drive transistor,

and wherein each of the driving circuit is coupled to a corresponding row of the pixel circuits.

15. The display device according to claim 14 , wherein the light emitting element includes an organic EL element.

16. The display device according to claim 14 , wherein an output node of the output-side inverter in each of the driving circuits is connected to a scanning line which is connected to the switch TFT in each of the pixel circuits in the corresponding row.

17. The display device according to claim 14 , wherein each of the pixel circuits are configured to execute a correction operation for correcting a dependence of a driving current for the light emitting element on a characteristic of the drive TFT.

18. The display device according to claim 17 , wherein an output pulse of one of the driving circuits defines duration of the correction operation of a corresponding one of pixel circuits.