DISPLAY DEVICE AND METHOD OF DRIVING THE SAME
First Claim
Patent Images
1. 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 the 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 the first scanning signal and that is connected between the second contact point and the output terminal of the driving transistor; and
a fourth switching transistor that is controlled by a second scanning signal and that is connected between the light-emitting element and the output terminal of the driving transistor.
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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.
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Citations
39 Claims
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1. A display device comprising:
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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 the 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 the first scanning signal and that is connected between the second contact point and the output terminal of the driving transistor; and a fourth switching transistor that is controlled by a second scanning signal and that is connected between the light-emitting element and the output terminal of the driving transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of driving a display device including a light-emitting element, a capacitor that is connected between first and second contact points, and a driving transistor that has an input terminal, an output terminal and a control terminal that is connected to the second contact point, the method comprising:
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disconnecting a connection between the output terminal of the driving transistor and the light-emitting element; connecting a data voltage to the first contact point, connecting the second contact point to the output terminal of the driving transistor, and connecting the output terminal of the driving transistor to the light-emitting element; disconnecting a connection between the output terminal of the driving transistor and the light-emitting element, in a state where the data voltage is connected to the first contact point and the second contact point is connected to the output terminal of the driving transistor; and disconnecting a connection between the first contact point and the data voltage, connecting a sustain voltage to the first contact point and connecting the light-emitting element to the output terminal of the driving transistor. - View Dependent Claims (18, 19)
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20. A display device comprising:
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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. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A method of driving a display device including a light-emitting element a capacitor that is connected between first and second contact points, and a driving transistor that has an input terminal, an output terminal, and a control terminal that is connected to the second contact point, the method comprising:
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disconnecting a connection between the output terminal of the driving transistor and the light-emitting element; connecting a sustain voltage to the first and second contact points; disconnecting a sustain voltage that is connected to the first and second contact points, connecting a data voltage to the first contact point, and connecting the second contact point to the output terminal of the driving transistor; disconnecting a connection between the first contact point and the data voltage, disconnecting a connection between the second contact point and the output terminal of the driving transistor, and reconnecting the first contact point and the sustain voltage; and connecting the light-emitting element to the output terminal of the driving transistor so as to emit light. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A method of driving a display device including a light-emitting element, a capacitor that is connected between first and second contact points, and a driving transistor that has an input terminal an output terminal, and a control terminal that is connected to the second contact point, the method comprising:
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disconnecting a connection between the output terminal of the driving transistor and the light-emitting element; connecting a pull-down voltage to the second contact point; disconnecting the pull-down voltage that is connected to the second contact point, connecting a data voltage to the first contact point, and connecting the second contact point to the output terminal of the driving transistor; disconnecting a connection between the first contact point and the data voltage, disconnecting a connection between the second contact point and the output terminal of the driving transistor, and connecting the first contact point and the sustain voltage; and connecting the light-emitting element to the output terminal of the driving transistor so as to emit light. - View Dependent Claims (36, 37, 38, 39)
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Specification