Image display device

1. An image display device, comprising:

a plurality of pixel circuits;

a power supply line;

a data line for supplying a data signal to each of the plurality of pixel circuits; and

a current path control unit, wherein:

the each of the plurality of pixel circuits comprises:

a light emitting element which emits light at a luminance corresponding to an amount of current;

a drive transistor for controlling a current flowing to the light emitting element;

a storage capacitor provided between the data line and a gate electrode of the drive transistor, for storing a potential difference corresponding to a display gray level; and

a data line connection switch for connecting a first end of the storage capacitor and the data line, where the first end of the storage capacitor is an end directly connected to the gate electrode of the drive transistor; wherein,

before the data line supplies the data signal to each of the plurality of pixel circuits, the data line connection switch included in corresponding one of the plurality of pixel circuits is turned ON by the current path control unit to interrupt a first current path from the power supply line to the first end of the storage capacitor included in the corresponding one of the plurality of pixel circuits.

2. The image display device according to claim 1 , wherein, when the data line connection switch included in each of the plurality of pixel circuits is turned ON, the current path control unit interrupts the first current path and a second current path from the power supply line to the light emitting element included in corresponding one of the plurality of pixel circuits.

3. The image display device according to claim 2 , wherein the current path control unit comprises:

a reset switch provided between the gate electrode and a drain electrode of the drive transistor included in the each of the plurality of pixel circuits; and

a lighting control switch for controlling ON/OFF of the current flowing from the drive transistor to the light emitting element included in the each of the plurality of pixel circuits.

4. The image display device according to claim 3 , further comprising:

at least one reference potential supply line; and

a reference potential supply source for supplying a reference potential, wherein:

the light emitting element included in each of the plurality of pixel circuits is provided between the drain electrode of the drive transistor included in corresponding one of the plurality of pixel circuits and any one of the at least one reference potential supply line; and

the lighting control switch is provided between the any one of the at least one reference potential supply line and the reference potential supply source.

5. The image display device according to claim 4 , further comprising a plurality of potential adjusting circuits, wherein:

the plurality of pixel circuits are divided into a plurality of groups depending on an emission color of the light emitting element included in corresponding one of the plurality of pixel circuits;

the at least one reference potential supply line, the lighting control switch, and one of the plurality of potential adjusting circuits are provided for each of the plurality of groups;

the light emitting element included in the pixel circuit which belongs to one of the plurality of groups is provided between the drain electrode of the drive transistor included in the pixel circuit and the at least one reference potential supply line corresponding to the one of the plurality of groups;

the lighting control switch corresponding to any one of the plurality of groups controls connection between the at least one reference potential supply line and one of the plurality of potential adjusting circuits corresponding to the any one of the plurality of groups; and

the plurality of potential adjusting circuits each supply a potential corresponding to the corresponding one of the plurality of groups.

6. The image display device according to claim 2 , wherein the current path control unit comprises a power supply control switch provided between the power supply line and a source electrode of the drive transistor included in each of the plurality of pixel circuits.

7. The image display device according to claim 6 , wherein:

the current path control unit further comprises:

a reset switch provided between the gate electrode and a drain electrode of the drive transistor included in the each of the plurality of pixel circuits; and

a lighting control switch for controlling ON/OFF of the current flowing from the drain electrode of the drive transistor to the light emitting element included in corresponding one of the plurality of pixel circuits; and

when the data line connection switch is turned ON, the reset switch and the lighting control switch are turned ON.

8. The image display device according to claim 1 , wherein the data line connection switch comprises a field effect transistor and has a gate electrode supplied with a predetermined potential.

9. A driving method for an image display device comprising a power supply line, a data line, and pixel circuits each including a light emitting element which emits light at a luminance corresponding to an amount of current, a storage capacitor, a drive transistor including a gate electrode connected to the data line via the storage capacitor, for controlling a current flowing to the light emitting element based on a potential difference stored in the storage capacitor, a reset switch provided between the gate electrode and a drain electrode of the drive transistor, and a data line connection switch for turning ON/OFF connection between a first end of the storage capacitor on the drive transistor side and the data line, where the first end of the storage capacitor is an end directly connected to the gate electrode of the drive transistor, the driving method comprising:

a precharge step of turning ON the data line connection switch and interrupting a first path of a current flowing from the power supply line to the first end of the storage capacitor and a second path of a current flowing from the power supply line to the light emitting element; and

after the precharge step, a data storing step of inputting, by the data line, a data signal to a second end of the storage capacitor while turning ON the reset switch.

10. The driving method for an image display device according to claim 9 , wherein the precharge step comprises turning ON the data line connection switch and turning OFF the reset switch, and interrupting a path of a current flowing from the drain electrode of the drive transistor to the light emitting element.

11. The driving method for an image display device according to claim 9 , wherein the precharge step comprises turning ON the data line connection switch and interrupting a current path between the power supply line and a source electrode of the drive transistor.

12. The driving method for an image display device according to claim 11 , wherein the precharge step comprises turning ON the data line connection switch and interrupting a current path between the power supply line and a source electrode of the drive transistor, and securing a current path from the light emitting element to the one end of the storage capacitor.

13. The driving method for an image display device according to claim 11 , wherein the precharge step comprises turning ON the data line connection switch and interrupting a current path between the power supply line and a source electrode of the drive transistor, and securing a current path from the light emitting element to the one end of the storage capacitor thereafter.

14. An image display device, comprising:

a plurality of pixel circuits;

a power supply line; and

a data line for supplying a data signal and an emission control signal to the plurality of pixel circuits,

wherein each of the plurality of pixel circuits comprises:

a light emitting element which emits light at a luminance corresponding to an amount of current;

a drive transistor including a source electrode connected to the power supply line;

a storage capacitor including a first end connected to a gate electrode of the drive transistor and a second end connected to the data line;

a data line connection switch including a first end directly connected to the first end of the storage capacitor, and a second end directly connected to the data line;

a reset switch provided between the gate electrode and a drain electrode of the drive transistor; and

a lighting control switch provided between an anode of the light emitting element and the drain electrode of the drive transistor.

15. An image display device, comprising:

a plurality of pixel circuits;

a power supply line; and

a data line for supplying a data signal and an emission control signal to the plurality of pixel circuits,

wherein each of the plurality of pixel circuits comprises:

a light emitting element which emits light at a luminance corresponding to an amount of current;

a drive transistor;

a storage capacitor including a first end connected to a gate electrode of the drive transistor and a second end connected to the data line;

a data line connection switch including a first end directly connected to the first end of the storage capacitor, and a second end directly connected to the data line;

a reset switch provided between the gate electrode and a drain electrode of the drive transistor;

a lighting control switch provided between an anode of the light emitting element and the drain electrode of the drive transistor; and

a current supply switch including a first end connected to the power supply line and a second end connected to a source electrode of the drive transistor.