Back to results
US 2024/0203349 A1Published application
Display device and driving method
AssigneeLG Display Co., Ltd.
InventorsSeokhyun HONG, JungHyeon KIM, Jaeik YOO
Life of this patent
Estimating the term…
Abstract
According to embodiments of the present disclosure, there may be provided a display device and a driving method. During a first type sensing time period during display driving, a voltage difference between a first node and a second node of a driving transistor is set to correspond to a threshold voltage stored in a memory, whereby it is possible to compensate for, in real time period, threshold voltage variations of driving transistors.
Claims16
A display device comprising:
- a plurality of data lines;
- a plurality of reference voltage lines;
- and
- a plurality of subpixels electrically 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 electrically 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 electrically 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, and
- wherein, during a first type sensing time period for the first subpixel, a voltage of the second node of the first driving transistor rises, and, before a voltage of the second node of the first driving transistor rises, a voltage difference between a sensing driving data voltage supplied to the first data line and a sensing driving reference voltage supplied to the first reference voltage line is set to correspond to a threshold voltage of the first driving transistor in the first subpixel identified from threshold voltage-related information stored in a memory.
4 more elements
A method for driving a display device, comprising:
- first step of setting a voltage value of at least one of a sensing driving data voltage and a sensing driving reference voltage;
- second step of, by applying the sensing driving data voltage to a first node of a driving transistor and applying the sensing driving reference voltage to a second node of the driving transistor, initializing the first node and the second node of the driving transistor;
- third step of, by floating the second node of the driving transistor, varying a voltage of the second node of the driving transistor;
- and
- fourth step of sampling a voltage of the second node of the driving transistor after a selected time period elapses from a time point at which a voltage of the second node of the driving transistor is varied,
- wherein, in the first step, a voltage value of at least one of the sensing driving data voltage and the sensing driving reference voltage is set so that a difference between the sensing driving data voltage and the sensing driving reference voltage corresponds to a threshold voltage of the driving transistor.
3 more elements
A display device comprising:
- a first subpixel including a first light emitting element, a first driving transistor, a first scan transistor, and a first storage capacitor;
- and
- a second subpixel including a second light emitting element, a second driving transistor, a second scan transistor, and a second storage capacitor,
- wherein, during a first blank time period, after a voltage difference between a first node and a second node of the first driving transistor of the first subpixel is initialized to a first control value, a voltage of the second node of the first driving transistor rises, and
- wherein, during a second blank time period after the first blank time period, after a voltage difference between a first node and a second node of the second driving transistor of the second subpixel is initialized to a second control value, a voltage of the second node of the second driving transistor does not rise.
2 more elements
A display device comprising:
- a first subpixel including a first light emitting element, a first driving transistor, a first scan transistor and a first storage capacitor;
- and
- a second subpixel including a second light emitting element, a second driving transistor, a second scan transistor, and a second storage capacitor,
- wherein, during a first blank time period, after a voltage difference between a first node and a second node of the first driving transistor of the first subpixel is initialized to a first control value, a voltage of the second node of the first driving transistor rises, and
- wherein, during a second blank time period after the first blank time period, after a voltage difference between a first node and a second node of the second driving transistor of the second subpixel is initialized to a second control value, a voltage of the second node of the second driving transistor rises and the second control value is set to be different from the first control value.
2 more elements
Dependencies are inferred from the claim text.