Display apparatus and driving method for display apparatus

1. A display apparatus, comprising:

a display section including a plurality of pixels disposed in a matrix and a plurality of signal lines and a plurality of scanning lines; and

a horizontal driving circuit and a vertical driving circuit configured to drive said signal lines and said scanning lines of said display section to display an image on said display section;

each of said pixels including

a light emitting device,

a signal level storage capacitor,

a writing transistor having a gate to which a wiring signal outputted from said vertical driving circuit is inputted to turn on said writing transistor to set a terminal voltage of said signal level storage capacitor to a signal level of a corresponding one of said signal lines, and

a driving transistor having a gate and a source connected to the opposite terminals of said signal level storage capacitor to drive said light emitting device in response to the voltage across said signal level storage capacitor thereby to cause said light emitting device to emit light;

said horizontal driving circuit and said vertical driving circuit being operable,

within a first period of a no-light emitting period of each of said pixels within which the emission of light of said light emitting device is stopped,

to turn on said writing transistor of the pixel to set a voltage at a first one of the terminals of said signal level storage capacitor to a halftone voltage corresponding to a halftone of said light emitting device through the signal line and turn on said driving transistor to charge a second one of the terminals of said signal level storage capacitor from said driving transistor, and

within a second period of the no-light emitting period following the first period,

to set the potential at the first terminal of said signal level storage capacitor to a fixed voltage, with which said driving transistor is turned off, through the signal line to hold the potential at the second terminal of said signal level storage capacitor to the potential set within the first period, and then

within a third period of the no-light emitting period following the second period,

to set the potential at the first terminal of said signal level storage capacitor to a gradation voltage corresponding to a gradation with which the light emitting device emits light and turn on said driving transistor to charge the second terminal of said signal level storage capacitor from said driving transistor and then turn off said writing transistor.

2. The display apparatus according to claim 1 , wherein said horizontal driving circuit and said vertical driving circuit drive said signal lines time-divisionally.

3. The display apparatus according to claim 2 , wherein the time-divisional driving of said signal lines is a process of

setting the halftone voltage or the fixed voltage simultaneously to the signal level storage capacitors of the pixels of a gradation setting object connected to said signal lines, and

setting said signal lines successively to the gradation voltages of the pixels of the gradating setting object to hold the gradation voltage by capacitance of said signal lines and then setting the gradation voltage held in said signal lines to the signal level storage capacitors of the pixels of the gradation setting object.

4. The display apparatus according to claim 1 , wherein said horizontal driving circuit

connects said signal lines to the fixed voltage or the halftone voltage through respective switch circuits to set the fixed voltage or the halftone voltage to the signal level storage capacitors of the pixels.

5. A driving method for a display apparatus which includes a display section including a plurality of pixels disposed in a matrix and a plurality of signal lines and a plurality of scanning lines, and a horizontal driving circuit and a vertical driving circuit configured to drive the signal lines and the scanning lines of the display section to display an image on the display section, each of the pixels including a light emitting device, a signal level storage capacitor, a writing transistor having a gate to which a wiring signal outputted from the vertical driving circuit is inputted to turn on the writing transistor to set a terminal voltage of the signal level storage capacitor to a signal level of a corresponding one of the signal lines, and a driving transistor having a gate and a source connected to the opposite terminals of the signal level storage capacitor to drive the light emitting device in response to the voltage across the signal level storage capacitor thereby to cause the light emitting device to emit light, said driving method comprising the steps of:

turning on, within a first period of a no-light emitting period of each of the pixels within which the emission of light of the light emitting device is stopped, the writing transistor of the pixel to set a voltage at a first one of the terminals of the signal level storage capacitor to a halftone voltage corresponding to a halftone of the light emitting device through the signal line and turn on the driving transistor to charge a second one of the terminals of the signal level storage capacitor from the driving transistor;

setting, within a second period of the no-light emitting period following the first period, the potential at the first terminal of the signal level storage capacitor to a fixed voltage, with which the driving transistor is turned off, through the signal line to hold the potential at the second terminal of the signal level storage capacitor to the potential set within the first period; and

setting, within a third period of the no-light emitting period following the second period, the potential at the first terminal of the signal level storage capacitor to a gradation voltage corresponding to a gradation with which the light emitting device emits light and turn on the driving transistor to charge the second terminal of the signal level storage capacitor from the driving transistor and then turn off the writing transistor.