Display apparatus, display-apparatus driving method and electronic instrument

A driving method provided for a display apparatus including pixel circuits laid out to form a pixel matrix to serve as pixel circuits each having an electro optical device configured to provide a light emission period and a no-light emission period, a signal writing transistor for writing a video signal, a signal storage capacitor for holding the video signal written by the signal writing transistor, and a device driving transistor for driving said electro optical device in accordance with the video signal held by the signal storage capacitor, the signal storage capacitor having a first terminal connected to a gate terminal of the device driving transistor and a second terminal connected to a current terminal of the device driving transistor, said driving method comprising:

• changing a power-supply electric potential appearing on a power-supply line that is connected to the device driving transistor, a first potential being applied to the power-supply line for providing a driving current flowing through the device driving transistor during the light emission period, a second potential being applied to the power-supply line within the no-light emission period, and a cathode potential being applied to the power-supply line within the no-light emission period, the cathode potential being an electric potential appearing on a cathode electrode of the electro optical device and differing from the second potential, wherein the cathode potential is applied to the power-supply line during a first portion of the no-light emission period, the second potential is applied to the power-supply line during a second portion of the no-light emission period that occurs after the first portion, and the second potential is lower than the cathode potential to apply a reverse bias to the electro optical device.

An electronic device employing a display apparatus comprising:

• a pixel matrix section including pixel circuits laid out to form a pixel matrix to serve as pixel circuits each having
• an electro optical device configured to provide a light emission period and a no-light emission period,
• a signal writing transistor for writing a video signal into a signal storage capacitor,
• the signal storage capacitor for holding the video signal written by the signal writing transistor, and
• a device driving transistor for driving the electro optical device in accordance with the video signal held by the signal storage capacitor, the signal storage capacitor having a first terminal connected to a gate electrode of the device driving transistor and a second electrode connected to a current terminal of the device driving transistor, and
• a power-supply section configured to
• change a power-supply electric potential appearing on a power-supply line that is connected to the device driving transistor, a first potential being applied to the power-supply line for providing a driving current flowing through the device driving transistor during the light emission period, a second potential being applied to the power-supply line within the no-light emission period, and a cathode potential being applied to the power-supply line within the no-light emission period, the cathode potential being an electric potential appearing on a cathode electrode of the electro optical device and differing from the second potential, wherein the cathode potential is applied to the power-supply line during a first portion of the no-light emission period, the second potential is applied to the power-supply line during a second portion of the no-light emission period that occurs after the first portion, and the second potential is lower than the cathode potential to apply a reverse bias to the electro optical device.

A display apparatus comprising:

• pixel matrix means including pixel circuits laid out to form a pixel matrix to serve as pixel circuits each having
• an electro optical device configured to provide a light emission period and a no-light emission period,
• a signal writing transistor for writing a video signal,
• a signal storage capacitor for holding the video signal written by the signal writing transistor, and
• a device driving transistor for driving the electro optical device in accordance with the video signal held by the signal storage capacitor, the signal storage capacitor having a first terminal connected to a gate terminal of the device driving transistor and a second terminal connected to a current terminal of the device driving transistor, and
• power-supply means for changing a power-supply electric potential appearing on a power-supply line that is connected to the device driving transistor, a first potential being applied to the power-supply line for providing a driving current flowing through the device driving transistor during the light emission period, a second potential being applied to the power-supply line within the no-light emission period, and a cathode potential being applied to the power-supply line within the no-light emission period, the cathode potential being an electric potential appearing on a cathode electrode of the electro optical device and differing from the second potential, wherein the cathode potential is applied to the power-supply line during a first portion of the no-light emission period, the second potential is applied to the power-supply line during a second portion of the no-light emission period that occurs after the first portion, and the second potential is lower than the cathode potential to apply a reverse bias to the electro optical device.