Display device including double-gate transistors with reduced deterioration
AssigneeSamsung Display Co., Ltd.
InventorsJi Hun Lim, Yeon Keon Moon, Masataka Kano, Jun Hyung Lim
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Abstract
A display device includes: a plurality of pixels, wherein each of the plurality of pixels includes at least two double-gate transistors including a first gate electrode and a second gate electrode; conduction between source electrodes and drain electrodes of the at least two double-gate transistors is controlled by a voltage applied to the first gate electrode, and electrical connection between the second gate electrode and the first gate electrode of each of the at least two double-gate transistors is determined depending on a polarity of a voltage applied on average to each of the at least two double-gate transistors.
Claims15
A display device comprising:
- a plurality of pixels,
- wherein each of the plurality of pixels includes at least two double-gate transistors, each double-gate transistor including a first gate electrode and a second gate electrode;
- wherein each double-gate transistor is configured to conduct a current between a source electrode thereof and a drain electrode thereof when a voltage is applied to the first gate electrode thereof,
- a type of electrical connection of the second gate electrode of each of the at least two double-gate transistors is selected depending on a polarity of a voltage applied on average to each of the at least two double-gate transistors,
- the type of electrical of the second gate electrode is one of a first electrical connection that is floated or a second electrical connection where the first gate electrode and the second gate electrode are connected, and
- the type of electrical connection of the second gate electrode
- is the first connection when the polarity of the voltage applied on average to each of the at least two double-gate transistors is a positive polarity, and
- is the second connection when the polarity of the voltage applied on average to each of the at least two double-gate transistors is a negative polarity.
A plurality of pixels in a display device comprising:
- at least a first transistor and a second transistor;
- wherein the first transistor and the second transistor are connected in series between a first power supply voltage and an organic light emitting diode (OLED),
- wherein the first transistor is a double-gate transistor and the second transistor is a double-gate transistor,
- a first gate electrode of the first transistor is connected to a light emission control signal line, a first gate electrode of the second transistor is connected to a third transistor and a capacitor,
- an electrical connection between the first gate electrode and the second electrode of each of the at least two double-gate transistors in each pixel depends on a polarity of a voltage applied on average to each of the at least two double-gate transistors, and
- a second gate electrode of the first transistor is floated and a second gate electrode of the second transistor is floated when the polarity of the voltage applied on average to each of the at least two double-gate transistors is a positive polarity.
Dependencies are inferred from the claim text.