Organic light emitting display device and method for driving the same
AssigneeSamsung Display Co., Ltd.
InventorIn-Soo Wang
Life of this patent
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Abstract
A pixel includes a driving transistor, an organic light emitting diode, a first transistor, and the second transistor. The driving transistor includes a gate electrode coupled to a first node, a first electrode coupled to a second node, and a drain electrode coupled to a third node. The driving transistor controls an amount of drain-source current based on a level of a voltage applied to the first node. The first transistor is coupled between the second node and a data line, and turns on by a scan signal of a scan line. The second transistor is coupled between the first node and an initialization voltage line, and turns on by an initialization signal of an initialization line. The first and second transistors are turned on during a first period.
Claims18
A display device, comprising:
- a display panel including data lines, scan lines, initialization lines, and a plurality of pixels, each pixel including:
- a driving transistor including a gate electrode coupled to a first node, a first electrode coupled to a second node, and a drain electrode coupled to a third node, the driving transistor to control an amount of drain-source current based on a level of a voltage applied to the first node;
- an organic light emitting diode (OLED) to emit light based on the drain-source current;
- a first transistor coupled between the second node and a data line, the first transistor to be turned on by a scan signal of a scan line;
- and
- a second transistor coupled between the first node and an initialization voltage line to supply an initialization voltage, the second transistor to be turned on by an initialization signal of an initialization line, wherein the first and second transistors are to be turned on during a first period.
A method for driving a display device, the method comprising:
- supplying a gate-on voltage to a driving transistor of a pixel by connecting a first electrode of the driving transistor to a data line in a first period and supplying an initialization signal to a transistor by connecting a gate electrode of the transistor to an initialization voltage line in the said first period;
- supplying a data voltage to the gate electrode of the driving transistor in a second period;
- and
- controlling an organic light emitting diode (OLED) to emit light in a third period, wherein the OLED coupled to the driving transistor to emit light based on a drain-source current of the driving transistor.
Dependencies are inferred from the claim text.