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US 9,792,853 B2Granted
Pixel, driving method of pixel, and display device including pixel
AssigneeSamsung Display Co., Ltd.
InventorJin Jeon
Life of this patent
Estimating the term…
Abstract
A pixel includes a driving transistor connected to an organic light emitting diode. The circuit places the driving transistor in an on-biased state based on first and second scan signals which at least partially overlap during a time when an organic light emitting diode does not emit light. The first and scan signals are received from different scan lines. The scan lines may be adjacent scan lines.
Claims21
A pixel, comprising:
- an organic light emitting diode;
- a switching transistor to switch a data signal based on a first scanning signal;
- a driving transistor to control a driving current to be supplied to the organic light emitting diode based on the data signal;
- a first transistor to transfer an initialization voltage to a gate of the driving transistor depending on a second scanning signal;
- and
- a second transistor to transfer the initialization voltage to the organic light emitting diode depending on the first scanning signal, wherein the first scanning signal is after the second scanning signal and wherein enable periods of the first and second scanning signals at least partially overlap to establish a current path through the switching transistor, the driving transistor, and the first transistor.
3 more elements
A pixel, comprising:
- an organic light emitting diode;
- a switching transistor to switch a data signal based on a first scanning signal;
- a driving transistor to control a driving current to be supplied to the organic light emitting diode based on the data signal;
- a first transistor to transfer an initialization voltage to a gate of the driving transistor depending on a second scanning signal;
- a second transistor to transfer the initialization voltage to the organic light emitting diode depending on the first scanning signal, wherein the first scanning signal is after the second scanning signal and wherein enable periods of the first and second scanning signals at least partially overlap;
- a third transistor having first and second terminals connected between the gate and a drain of the driving transistor, the third transistor to perform a switching operation depending on the first scanning signal;
- and
- a capacitor connected between the gate of the driving transistor and a first power supply voltage.
5 more elements
A display device, comprising:
- a plurality of pixels;
- and
- a plurality of data lines, a plurality of scanning lines, and a plurality of light emitting control lines, wherein each pixel is connected to a corresponding one of the data lines, two scanning lines, and a corresponding one of the light emitting control lines, each pixel including:
- an organic light emitting diode;
- a switching transistor to switch a data signal based on a first scanning signal;
- a driving transistor to control a driving current to be supplied to the organic light emitting diode based on the data signal;
- a first transistor to transfer an initialization voltage to a gate of the driving transistor depending on a second scanning signal;
- and
- a second transistor to transfer the initialization voltage to the organic light emitting diode depending on the first scanning signal, wherein the first scanning signal is after the second scanning signal and wherein at least one enable period of the first scanning signal and at least one enable period of the second scanning signal at least partially overlap to establish a current path through the switching transistor, the driving transistor, and the first transistor.
6 more elements
A method for driving a pixel including a driving transistor that controls a driving current of an organic light emitting diode, the method comprising:
- turning on a first transistor based on a first scanning signal;
- turning on a switching transistor based on a second scanning signal different from the first scanning signal;
- turning on a second transistor connected between a gate and a drain of a driving transistor based on the second scanning signal;
- and
- on-biasing the driving transistor through a signal path which includes the switching transistor, the driving transistor, the second transistor, and the first transistor, the driving transistor on-biased for a period during which the first transistor and the switching transistor are simultaneously turned on.
2 more elements
A method for driving a pixel including a driving transistor that controls a driving current of an organic light emitting diode, the method comprising:
- turning on a first transistor based on a first scanning signal;
- turning on a switching transistor based on a second scanning signal;
- turning on a second transistor connected between a gate and a drain of a driving transistor based on the second scanning signal;
- and
- on-biasing the driving transistor through a signal path which includes the switching transistor, the driving transistor, the second transistor, and the first transistor, the driving transistor on-biased for a period during which the first transistor and the switching transistor are simultaneously turned on, wherein the first scanning signal is enabled earlier than the second scanning signal.
2 more elements
A pixel, comprising:
- a driving transistor;
- and
- a circuit connected to the driving transistor,
- wherein the circuit is to place the driving transistor in an on-biased state based on first and second scan signals which at least partially overlap during a time when an organic light emitting diode connected to the driving transistor does not emit light, wherein the driving transistor is to output current to the organic light emitting diode to emit light, wherein a current path is established through the driving transistor when the first and second scan signals partially overlap, the current path coupled to an initialization voltage, and wherein an overlap period of enable periods of the first and second scan signals is less than an enable period of the first scan signal and an enable period of the second scan signal.
1 more element
Dependencies are inferred from the claim text.