EL display panel, electronic apparatus and EL display panel driving method

1. An electronic device including a luminescence display panel configured for active-matrix driving, the luminescence display panel comprising:

(i) a plurality of pixel circuits each including:

a driving transistor configured to control a driving current for a light luminescence device,

a signal holding capacitor configured to output a driving voltage to the gate electrode of the driving transistor,

a coupling capacitor connected to the signal holding capacitor; and

a sampling transistor configured to control an operation to store a signal electric potential in the signal holding capacitor from a signal line;

(ii) a capacitor control line connected to the coupling capacitors of a plurality of the pixel circuits; and

(iii) a peripheral unit configured to control an electric potential of at least the capacitor control line and the signal line,

wherein the peripheral unit being operable to:

change an electric potential of the capacitor control line from a first potential to a second potential after the beginning of a reset period, the reset period being a period in which a reference electric potential is applied to the holding capacitors of the plurality of the pixel circuits, and

change an electric potential of the capacitor control line from the second potential to the first potential after the end of the reset period,

wherein the peripheral unit comprising a vertical unit and a horizontal unit,

the each signal line respectively connected to the plurality of the pixel circuits, is controlled by the horizontal unit, and

the capacitor control line is controlled by the vertical unit

wherein the reference electric potential is provided through the horizontal unit,

wherein the peripheral unit is operable to:

change an electric potential of the capacitor control line from the first potential to the second potential while the reference electric potential is being applied to the plurality of the pixel circuits through the horizontal unit, and

wherein the peripheral unit is configured to execute threshold voltage compensation process, and

after the electric potential of the capacitor control line is changed from the second potential to the first potential, a signal stored in the signal holding capacitor is set to include a signal information and a threshold voltage information of the driving transistor.

2. The electronic device according to claim 1 , wherein the horizontal unit comprising a horizontal selector configured to selectively output the signal electric potential and the reference electric potential, so that the signal electric potential and the reference electric potential are time-divisionally applied to the signal line.

3. The electronic device according to claim 1 , wherein the vertical unit comprises:

a signal-write control line driving section configured to control the each sampling transistor, of the plurality of the pixel circuits through a scan line, and

a pulse voltage source configured to control the capacitor control line.

4. The electronic device according to claim 1 , wherein the threshold-voltage compensation process is executed by extracting a current from the driving transistor and feeding back the extracted current to the signal holding capacitor.

5. The electronic device according to claim 4 , wherein the mobility compensation process is executed by extracting a current from the driving transistor and feeding back the extracted current to the signal holding capacitor while the signal electric potential is being applied to the signal holding capacitor.

6. The electronic device according to claim 1 , wherein the peripheral unit is further configured to execute mobility compensation process, and

after the electric potential of the capacitor control line is changed from the second potential to the first potential, a signal stored in the signal holding capacitor is set to further include a mobility information of the driving transistor.

7. The electronic device according to claim 1 , wherein the light luminescence device comprises an organic electroluminescence element.

8. The electronic device according to claim 1 , wherein the second potential is higher than the first potential.

9. The electronic device according to claim 1 , wherein a thin-film transistor of an N-channel type is employed as the driving transistor.

10. The electronic device according to claim 1 , wherein the electronic device is an electronic apparatus selected from the group consisting of a computer and a TV receiver.

11. A luminescence display panel configured for active-matrix driving, the display panel comprising:

pixel circuits each including at least:

a driving transistor for controlling a driving current for a light luminescence device,

a signal holding capacitor connected to output a driving voltage to the gate electrode of the driving transistor,

a coupling capacitor connected to the signal holding capacitor, and

a sampling transistor for controlling an operation to store a signal electric potential into the signal holding capacitor from a signal line;

a capacitor control line connected to the coupling capacitors of at least a plurality of the pixel circuits; and

a peripheral unit for controlling an electric potential of at least the capacitor control line and the signal line;

the peripheral unit being operable to:

change an electric potential of the capacitor control line from a first potential to a second potential after the beginning of a reset period, the reset period being a period in which a reference electric potential is being applied to the each signal holding capacitor of the plurality of the pixel circuits, and

change an electric potential of the capacitor control line from the second potential to the first potential after the end of reset period, and

wherein the peripheral unit is configured to execute threshold voltage compensation process such that a signal stored in the signal holding capacitor is dependent on both of a signal information provided from the signal line and a threshold voltage information of the driving transistor, after the electric potential of the capacitor control line is changed from the second potential to the first potential.

12. An electronic device comprising the luminescence display panel according to claim 11 .

13. The electronic device according to claim 12 , wherein the electronic device is a mobile phone.

14. The electronic device according to claim 12 , wherein the electronic device is a camera.

15. The electronic device according to claim 12 , wherein the electronic device is a portable computer.

16. An electronic device comprising a luminescence display panel which includes:

(i) a plurality of pixel circuits, each of the pixel circuits including:

a driving transistor configured to control a driving current for a light luminescence device,

a signal holding capacitor configured to provide a driving voltage to the gate electrode of the driving transistor,

a coupling capacitor connected to the signal holding capacitor, and

a sampling transistor configured to control an operation to store a signal electric potential in the signal holding capacitor from a signal line,

(ii) a capacitor control line connected to the coupling capacitors of the pixel circuits; and

(iii) a peripheral circuitry configured to control an electric potential of at least the capacitor control line and the signal line,

wherein the peripheral circuitry being operable to:

change an electric potential of the capacitor control line from a first potential to a second potential after the beginning of a reset period, the reset period being a period in which a reference electric potential is applied to the holding capacitors of the pixel circuits; and

change an electric potential of the capacitor control line from the second potential to the first potential after the end of the reset period,

wherein the peripheral circuitry is configured to execute threshold voltage compensation process, and

wherein the peripheral circuitry is configured to execute threshold voltage compensation process such that a signal stored in the signal holding capacitor is dependent on both of a signal information provided from the signal line and a threshold voltage information of the driving transistor, after the electric potential of the capacitor control line is changed from the second potential to the first potential.

17. The electronic device according to claim 16 ,

wherein the peripheral circuitry comprising a vertical circuitry and a horizontal circuitry,

the each signal line respectively connected to the plurality of the pixel circuits, is controlled by the horizontal circuitry, and

the capacitor control line is controlled by the vertical circuitry.

18. The electronic device according to claim 17 ,

wherein the reference electric potential is provided through the horizontal circuitry.

19. The electronic device according to claim 18 ,

wherein the peripheral circuitry is operable to:

change an electric potential of the capacitor control line from the first potential to the second potential while the reference electric potential is being applied to the plurality of the pixel circuits through the horizontal circuitry.

20. The electronic device according to claim 16 ,

wherein the peripheral circuitry is operable to:

change an electric potential of the capacitor control line from the first potential to the second potential while the reference electric potential is being applied to the plurality of the pixel circuits through the horizontal circuitry.

21. The electronic device according to claim 16 , wherein the threshold voltage compensation process is executed by extracting a current from the driving transistor and feeding back the extracted current to the signal holding capacitor.

22. The electronic device according to claim 16 , wherein the light luminescence device comprises an organic electroluminescence element.

23. The electronic device according to claim 16 , wherein the second potential is higher than the first potential.

24. The electronic device according to claim 16 , wherein the electronic device is an electronic apparatus selected from the group consisting of a computer and a TV receiver.