Controller, display device and driving method
AssigneeLG Display Co., Ltd.
InventorsSeokhyun HONG, Tae-Wook KIM, Jaeyoon BAE
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Abstract
According to embodiments of the present disclosure, there may be provided a controller, a display device and a driving method. In consideration of that a hysteresis by an image data voltage supplied to a subpixel during an active time may exert an influence on a real-time sensing process, by correcting a reference sensing driving data voltage on the basis of an offset voltage, it is possible to correct the influence of a hysteresis exerted on sensing of the characteristic value of a driving transistor.
Claims18
A display device, comprising:
- a plurality of data lines;
- a plurality of reference voltage lines;
- and
- a plurality of subpixels connected to the plurality of data lines and the plurality of reference voltage lines,
- wherein the plurality of data lines include a first data line which is connected to a first subpixel among the plurality of subpixels, and the plurality of reference voltage lines include a first reference voltage line which is connected to the first subpixel,
- wherein the first subpixel includes a first light emitting element, a first driving transistor, a first scan transistor and a first sensing transistor, a first node of the first driving transistor is electrically connectable to the first data line through the first scan transistor, and a second node of the first driving transistor is electrically connectable to the first reference voltage line through the first sensing transistor,
- wherein an image data voltage is supplied to the first subpixel during an active time, and
- wherein a sensing driving data voltage is supplied to the first subpixel during a blank time different from the active time, and the sensing driving data voltage is variable depending on the image data voltage.
A method for driving a display device, comprising:
- setting a sensing driving data voltage;
- by supplying the sensing driving data voltage to a first node of a driving transistor and supplying a sensing driving reference voltage to a second node of the driving transistor, initializing the first node and the second node of the driving transistor;
- by floating the second node of the driving transistor, changing a voltage of the second node of the driving transistor;
- and
- after a predetermined time elapses from a time point at which a voltage of the second node of the driving transistor is changed, sampling a voltage of the second node of the driving transistor,
- wherein the setting the sensing driving data voltage is performed after an image data voltage is supplied to a first subpixel during an active time, and
- wherein, in the initializing the first node and the second node of the driving transistor, the sensing driving data voltage is variable depending on the image data voltage.
A controller, comprising:
- a control signal output unit configured to output a data control signal to a data driving circuit;
- and
- a data output unit configured to output data to the data driving circuit,
- wherein the data output unit outputs, during an active time, image data to be supplied to a first subpixel among a plurality of subpixels disposed in a display panel, and
- wherein the data output unit outputs, during a blank time different from the active time, sensing driving data to be supplied to the first subpixel, and the sensing driving data is variable based on the image data.
Dependencies are inferred from the claim text.