Display device and method of driving the same
AssigneeSamsung Display Co., Ltd.
InventorSung Hwan Kim
Life of this patent
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Abstract
A display device may include: a first pixel coupled to a first scan line, a first data line, and a first sensing line; a second pixel coupled to the first scan line, a second data line, and a second sensing line; a first sensing channel corresponding to the first pixel and including a first sampling capacitor; and a second sensing channel corresponding to the second pixel and including a second sampling capacitor. During a first period, the first sensing channel may store a first sampling signal in the first sampling capacitor while the first sensing line is coupled to the first sensing channel, and the second sensing channel may store a second sampling signal in the second sampling capacitor while the second sensing line is disconnected from the second sensing channel.
Claims20
A display device comprising:
- a first pixel comprising a first scanning transistor coupled to a first scan line and a first data line and a first sensing transistor coupled to a first sensing line;
- a second pixel comprising a second scanning transistor coupled to the first scan line and a second data line and a second sensing transistor coupled to a second sensing line;
- and
- a sensor, the sensor comprising:
- a first sensing channel corresponding to the first pixel and including a first sampling capacitor;
- and
- a second sensing channel corresponding to the second pixel and including a second sampling capacitor,
- wherein, during a first period, the first sensing channel stores a first sampling signal in the first sampling capacitor while the first sensing line is coupled to the first sensing channel, and the second sensing channel stores a second sampling signal in the second sampling capacitor while the second sensing line is disconnected from the second sensing channel.
A display device comprising a pixel and a sensing channel,
- wherein the pixel comprises:
- a first transistor including a gate electrode coupled to a first node, a first electrode, and a second electrode coupled to a second node;
- a storage capacitor including a first electrode coupled to the first node, and a second electrode coupled to the second node;
- a second transistor including a gate electrode coupled to a first scan line, a first electrode coupled to a data line, and a second electrode coupled to the first node;
- and
- a third transistor including a gate electrode coupled to a second scan line, a first electrode coupled to the second node, and a second electrode coupled to a sensing line,
- wherein the sensing channel comprises:
- a first switch including a first end coupled to the sensing line, and a second end coupled to a third node;
- a second switch including a first end coupled to the third node, and a second end coupled to an initialization power supply;
- an amplifier including a first input terminal coupled to a reference power supply;
- a third switch including a first end coupled to the third node, and a second end coupled to a second input terminal of the amplifier;
- and
- a sensing capacitor including a first electrode coupled to the second input terminal of the amplifier and a second electrode coupled to an output terminal of the amplifier.
A method of driving a display device, comprising:
- applying a scan signal having a turn-on level to a first scan line coupled to a first pixel and a second pixel;
- storing a first sampling signal in a first sampling capacitor in a first sensing channel which corresponds to the first pixel during a first period while connecting the first sensing channel to the first pixel;
- and
- storing a second sampling signal in a second sampling capacitor in a second sensing channel which corresponds to the second pixel during the first period while disconnecting the second sensing channel from the second pixel.
Dependencies are inferred from the claim text.