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US 2021/0005145 A1Published application
Display device, gate driving circuit, and driving method thereof
AssigneeLG Display Co., Ltd.
InventorsSangJae LEE, SungJoong KIM, Kyuhwan JOO
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Abstract
Embodiments of the present disclosure relate to a display device, a gate driving circuit, and a driving method thereof, and more specifically, to a display device, a gate driving circuit, and a driving method thereof capable of solving problems with insufficient charging time or image abnormalities by controlling supply timing of two gate signals, e.g., scan signals and sense signals.
Claims20
A gate driving circuit comprising:
- a scan clock signal generator configured to receive a first reference scan clock signal and a second reference scan clock signal and configured to generate and output a scan clock signal;
- a sense clock signal generator configured to receive a first reference sense clock signal and a second reference sense clock signal and configured to generate and output a sense clock signal;
- and
- a gate signal outputter configured to output a scan signal having a turn-on level voltage interval, based on the scan clock signal, and configured to output a sense signal having a turn-on level voltage interval, based on the sense clock signal,
- wherein the second reference scan clock signal rises and falls after the first reference scan clock signal rises and falls,
- wherein the second reference sense clock signal rises and falls after the first reference sense clock signal rises and falls,
- wherein a high-level gate voltage interval of the sense clock signal is delayed from a high-level gate voltage interval of the scan clock signal by a predetermined sense shift time, and
- wherein a turn-on level voltage interval of the sense signal is delayed from a turn-on level voltage interval of the scan signal by the sense shift time.
5 more elements
A display device, comprising:
- a display panel comprising a plurality of data lines, a plurality of scan signal lines, a plurality of sense signal lines, a plurality of reference lines, and a plurality of subpixels each comprising an emission element, a driving transistor configured to drive the emission element, a scan transistor configured to control a connection between the data line and a first node of the driving transistor according to a scan signal, a sense transistor configured to control a connection between the reference line and a second node of the driving transistor according to a sense signal, and a capacitor connected between the first node and the second node of the driving transistor;
- a data driving circuit configured to drive the plurality of data lines;
- a first gate driving circuit configured to supply a first scan signal having an interval of a turn-on level voltage to a first scan signal line electrically connected to a gate node of the scan transistor in a first subpixel included in the plurality of subpixels;
- and
- a second gate driving circuit configured to supply a first sense signal having an interval of a turn-on level voltage, which is delayed from the interval of a turn-on level voltage of the first scan signal by a predetermined sense shift time, to a first sense signal line electrically connected to a gate node of the sense transistor in the first subpixel.
2 more elements
A method for driving a display device, the method comprising:
- supplying a first scan signal having an interval of a turn-on level voltage to a first scan signal line connected to a gate node of a scan transistor in a first subpixel among a plurality of subpixels, thereby transmitting an image data voltage supplied to a data line to a first node of a driving transistor in the first subpixel through the scan transistor;
- supplying a first sense signal having an interval of a turn-on level voltage, which is delayed from the interval of a turn-on level voltage of the first scan signal by a predetermined sense shift time, to a first sense signal line electrically connected to a gate node of a sense transistor in the first subpixel, thereby transmitting a reference voltage supplied to a reference line to a second node of the driving transistor through the sense transistor;
- and
- supplying the first scan signal having the interval of a turn-off level voltage to the first scan signal line and supplying the first sense signal having the interval of a turn-off level voltage to the first sense signal line.
1 more element
Dependencies are inferred from the claim text.