Electrophoretic display device, method of driving the same, and electronic device

1. An electrophoretic display device configured such that an electrophoretic element is sandwiched between a pair of substrates and including a display section having a plurality of pixels arranged therein, the electrophoretic display device comprising:

a controller for controlling the display section;

scanning lines, data lines, power supply lines and enable lines provided in the display section, the scanning lines, the data lines, the power supply lines and the enable lines being connected to the pixels;

an enable line control circuit having switch circuits provided so as to correspond to a plurality of the enable lines, and a first power supply line and a second power supply line connected to the enable line control circuit; and

in each of the pixels,

a pixel electrode,

a control transistor connected to one of the scanning lines and one of the data lines,

a driving transistor having a gate connected to a drain of the control transistor and having a drain connected to one of the power supply lines,

a storage capacitor connected to the gate and a source of the driving transistor, and

an enable transistor connected between the source of the driving transistor and the pixel electrode, the enable transistor switching electrical connection between the pixel electrode and the driving transistor on the basis of a signal input through one of the enable lines,

wherein the controller performs, when displaying an image on the display section,

an initialization driving operation for initializing a source potential and a gate potential of the driving transistor to have a certain potential relationship,

a threshold voltage correcting operation for correcting a threshold voltage of the driving transistor,

a mobility correcting operation for correcting mobility of the driving transistor, and

an image displaying operation for driving the electrophoretic element,

the controller turns on the enable transistor to correct the plurality of the pixels to a given gradation during the initialization driving operation,

further wherein one of the switch circuits has a first transistor inserted between one of the enable lines and the first power supply line, and a second transistor inserted between the enable line and the second power supply line, and

a gate of the first transistor is connected to a first one of the scanning lines to which the switch circuit belongs, and a gate of the second transistor is connected to a second one of the scanning lines that is different from the first scanning line.

2. The electrophoretic display device according to claim 1 , wherein the controller turns off the enable transistor in periods of the threshold voltage correcting operation and the mobility correcting operation.

3. An electronic device comprising the electrophoretic display device according to claim 1 .

4. The electrophoretic display device according to claim 1 , further comprising:

a third power supply line connected to the enable line control circuit,

wherein the switch circuit has a third transistor inserted between the enable line and the third power supply line, and

a gate of the third transistor is connected to a third one of the scanning lines or another control line, the third scanning line being different from the first and second scanning lines.

5. The electrophoretic display device according to claim 1 ,

wherein the switch circuit has a capacitor having one electrode connected to the enable line.

6. An electrophoretic display device configured such that an electrophoretic element is sandwiched between a pair of substrates and including a display section having a plurality of pixels arranged therein, the electrophoretic display device comprising:

scanning lines, data lines, power supply lines and enable lines provided in the display section, the scanning lines, the data lines, the power supply lines and the enable lines being connected to the pixels;

an enable line control circuit having switch circuits provided so as to correspond to a plurality of the enable lines, and a first power supply line and a second power supply line connected to the enable line control circuit; and

in each of the pixels,

a pixel electrode,

a control transistor connected to one of the scanning lines and one of the data lines,

a driving transistor having a gate connected to a drain of the control transistor and having a drain connected to one of the power supply lines,

a storage capacitor connected to the gate and a source of the driving transistor, and

an enable transistor connected between the source of the driving transistor and the pixel electrode, the enable transistor switching electrical connection between the pixel electrode and the driving transistor on the basis of a signal input through one of the enable lines,

wherein one of the switch circuits has a first transistor inserted between one of the enable lines and the first power supply line, and a second transistor inserted between the enable line and the second power supply line,

a gate of the first transistor is connected to a first one of the scanning lines to which the switch circuit belongs, and

a gate of the second transistor is connected to a second one of the scanning lines that is different from the first scanning line.

7. The electrophoretic display device according to claim 6 , further comprising a third power supply line connected to the enable line control circuit,

wherein the switch circuit has a third transistor inserted between the enable line and the third power supply line, and

a gate of the third transistor is connected to a third one of the scanning lines or another control line, the third scanning line being different from the first and second scanning lines.

8. The electrophoretic display device according to claim 6 , wherein the switch circuit has a capacitor having one electrode connected to the enable line.

9. A method of driving an electrophoretic display device, the electrophoretic display device configured such that an electrophoretic element is sandwiched between a pair of substrates and including a display section having a plurality of pixels arranged therein, the electrophoretic display device including scanning lines, data lines, power supply lines and enable lines provided in the display section, the scanning lines, the data lines, the power supply lines and the enable lines being connected to the pixels; an enable line control circuit having switch circuits provided so as to correspond to a plurality of the enable lines, and a first power supply line and a second power supply line connected to the enable line control circuit, one of the switch circuits has a first transistor inserted between one of the enable lines and the first power supply line, and a second transistor inserted between the enable line and the second power supply line, a gate of the first transistor is connected to a first one of the scanning lines to which the switch circuit belongs, and a gate of the second transistor is connected to a second one of the scanning lines that is different from the first scanning line; and, in each of the pixels, a pixel electrode, a control transistor connected to one of the scanning lines and one of the data lines, a driving transistor having a gate connected to a drain of the control transistor and having a drain connected to one of the power supply lines, a storage capacitor connected to the gate and a source of the driving transistor, and an enable transistor connected between the source of the driving transistor and the pixel electrode, the enable transistor switching electrical connection between the pixel electrode and the driving transistor on the basis of a signal input through one of the enable lines, the method comprising:

displaying an image on the display section, including:

initializing a source potential and a gate potential of the driving transistor to have a certain potential relationship,

correcting a threshold voltage of the driving transistor,

correcting mobility of the driving transistor, and

driving the electrophoretic element,

during the initializing, correcting the plurality of the pixels to a given gradation,

wherein, in the correcting of the plurality of the pixels, the enable transistor is in an on-state,

wherein, in the correcting of the threshold voltage and the correcting of the mobility, the enable transistor is in an off-state.

10. The method according to claim 9 , wherein on-off control of the enable transistor is performed by using a potential of a first one of the scanning lines, the first scanning line being connected to the pixel to which the enable transistor belongs, and a potential of a second one of the scanning lines, the second scanning line being different from the first scanning line.

11. The method according to claim 10 , wherein, after the on-off control has been performed by using the potentials of the first and second scanning lines, on-off control of the enable transistor is performed by using a potential of a third one of the scanning lines, the third scanning line being different from the first and second scanning lines.

12. The method according to claim 9 , a potential supplied to the power supply line is switched in synchronization with an operation of selecting a first one of the scanning lines that is connected to the same one of the pixels as the power supply line, and an operation of selecting a second one of the scanning lines that is subsequent to the first scanning line.