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US 8,552,938 B2Granted
Display device and method of driving the same
AssigneeSamsung Display Co., Ltd.
InventorsBaek-Woon Lee, Doo-Hyung Woo, Kyong-Tae Park, Ji-Hye Eom, Seong-Il Park
Life of this patent
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Abstract
A display device and a method of driving the same in which moving image blurring is prevented and a contrast ratio is enhanced by providing a light-emitting element, switching transistors, and a driving transistor with driving signals that include specific voltages at predetermined times, so that the light-emitting element does not emit light for an entire frame and the light output is not influenced by a threshold voltage of the driving transistor.
Claims9
A display device comprising:
- a light-emitting element;
- a first capacitor that is connected between first and second contact points;
- a driving transistor that has an output terminal, an input terminal that is connected to a first voltage, and a control terminal that is connected to a second contact point;
- a first switching transistor that is controlled by a first scanning signal and that is connected between a data voltage and the first contact point;
- a second switching transistor that is controlled by the first scanning signal and that is connected between a second voltage and the first contact point;
- a third switching transistor that is controlled by a second scanning signal and that is connected between the second contact point and the output terminal of the driving transistor;
- a fourth switching transistor that is controlled by a third scanning signal and that is connected between the light-emitting element and the output terminal of the driving transistor;
- and
- a fifth switching transistor that is controlled by a fourth scanning signal and that is connected between the second voltage and the second contact point,
- wherein the first, second, third, and fourth scanning signals consist of a high voltage and a low voltage, and periods in which each of the second and fourth scanning signals is a high voltage do not overlap.
7 more elements
A display device comprising:
- a light-emitting element;
- a first capacitor that is connected between first and second contact points;
- a driving transistor that has an output terminal, an input terminal that is connected to a first voltage, and a control terminal that is connected to a second contact point;
- a first switching transistor that is controlled by a first scanning signal and that is connected between a data voltage and the first contact point;
- a second switching transistor that is controlled by the first scanning signal and that is connected between a second voltage and the first contact point;
- a third switching transistor that is controlled by a second scanning signal and that is connected between the second contact point and the output terminal of the driving transistor;
- a fourth switching transistor that is controlled by a third scanning signal and that is connected between the light-emitting element and the output terminal of the driving transistor;
- and
- a fifth switching transistor that is controlled by a fourth scanning signal and that is connected between the second voltage and the second contact point,
- wherein a period in which the third scanning signal is a high voltage is longer than a period in which the first, second, and fourth scanning signals are a high voltage.
7 more elements
Dependencies are inferred from the claim text.