Method of driving light-emitting device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsMitsuaki Osame, Aya Anzai, Yu Yamazaki, Tomoyuki Iwabuchi
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Abstract
Degradations in light emitting elements occur with the passage of time. A method of driving a light-emitting device is characterized by including the steps of: supplying a light-emitting element with the current in response to an analog video signal during a sustaining period; and turning switch off thereby to make the light-emitting element nonluminous or making first and the second electrodes identical in potential thereby to make the light-emitting element nonluminous during an off time period.
Claims31
A method of driving a light-emitting device comprising a pixel comprising a first transistor, a second transistor and a light-emitting element, the method comprising steps of:
- inputting an analog video signal to a gate of the second transistor through the first transistor to supply the light-emitting element and the second transistor with a current in accordance with the analog video signal during a first period, and
- inputting a signal to the gate of the second transistor through the first transistor to turn the second transistor off during a second period,
- wherein one frame period comprises the first period and the second period.
A method of driving a light-emitting device comprising a pixel comprising a first transistor, a second transistor and a light-emitting element, and a switch between a power source and the pixel, the method comprising steps of:
- inputting an analog video signal to a gate of the second transistor through the first transistor and supply the light-emitting element and the second transistor with a current in accordance with the analog video signal during a first period;
- and
- turning the switch off during a second period,
- wherein the switch is held on during the first period, and
- wherein one frame period comprises the first period and the second period.
A method of driving a light-emitting device comprising a pixel comprising a first transistor, a second transistor and a light-emitting element, the method comprising steps of:
- making the light-emitting element luminous by inputting an analog video signal to a gate of the second transistor through the first transistor to supply the light-emitting element and the second transistor with a current in accordance with the analog video signal during a first period;
- making the light-emitting element nonluminous during a second period;
- and
- making the light-emitting element luminous in accordance with the analog video signal during a third period,
- wherein one frame period comprises the first period, the second period, and the third period.
A method of driving a light-emitting device comprising a pixel comprising a first transistor, a second transistor and a light-emitting element, the method comprising steps of:
- inputting an analog video signal to a gate of the second transistor through the first transistor to supply the light-emitting element and the second transistor with a current in accordance with the analog video signal during a first period;
- and
- making a first electrode or a second electrode of the light-emitting element electrically floated during a second period after the first period,
- wherein one frame period comprising the first period and the second period.
Dependencies are inferred from the claim text.