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US 12,183,232 B2Granted
Display device
AssigneeLG Display Co., Ltd.
InventorSanghyun Park
Life of this patent
Estimating the term…
Abstract
Embodiments relate to a display device comprising a display panel on which a pixel is disposed; a gate driving circuit including a stage circuit that outputs a gate signal to the pixel according to voltages of Q node and QB node; a monitoring transistor connected to at least one of the Q node and QB node of the stage circuit; a power control unit that generates a compensation value according to a monitoring voltage output from the monitoring transistor and provides a driving voltage compensated according to the compensation value to the gate driving circuit; and a timing controller that detects an abnormal state of the monitoring transistor and controls an output of the compensation value.
Claims19
A display device comprising:
- a display panel including a pixel;
- a gate driving circuit including a stage circuit, the stage circuit configured to output a gate signal to the pixel according to voltages of a Q node and a QB node of the stage circuit;
- a monitoring transistor disposed in the display panel and including a gate electrode that is connected to at least one of the Q node and QB node of the stage circuit of the gate driving circuit, the monitoring transistor configured to output a monitoring voltage based on the voltages of the Q node and the Qb node of the stage circuit of the gate driving circuit;
- a power control circuit configured to generate a compensation value that compensates a driving voltage according to the monitoring voltage output from the monitoring transistor, and outputs the driving voltage compensated with the compensation value to the gate driving circuit;
- and
- a timing controller configured to detect an abnormal state of the monitoring transistor based on the compensated driving voltage and controls whether the compensation value is output to compensate the driving voltage.
3 more elements
A display device, comprising:
- a gate driving circuit including a stage circuit, the stage circuit configured to output a gate signal to a pixel according to voltages of a Q node and a QB node of the stage circuit;
- a monitoring transistor disposed in a display panel and including a gate electrode connected to at least one of the Q node and QB node of the stage circuit of the gate driving circuit, the monitoring transistor configured to output a monitoring voltage that is indicative of a deterioration of the gate driving circuit;
- a power control unit configured to receive the monitoring voltage and generate a compensation value corresponding to monitoring voltage that is indicative of the deterioration of the gate driving circuit, and outputs a driving voltage that is compensated with the compensation value to the gate driving circuit;
- a monitoring circuit configured to detect an abnormal state of the monitoring transistor based on the compensation value;
- and
- a timing controller that blocks an output of the compensation value and outputs a driving voltage of a preset level to the gate driving circuit responsive to detection of the monitoring transistor being in the abnormal state by the monitoring circuit.
3 more elements
A display device comprising:
- a display panel including a pixel;
- a gate driving circuit including a stage circuit that is configured to output a gate signal to the pixel according to voltages of a Q node and a QB node of the stage circuit;
- a monitoring transistor included in the display panel and connected to the Q node or the QB node of the stage circuit, the monitoring transistor configured to output a monitoring voltage based on one of a voltage of the Q node or a voltage of the QB node;
- a power control circuit including an amplifier having a first input that receives the monitoring voltage and a second input that receives a reference voltage, the power control circuit configured to output a compensation value based on a difference between the monitoring voltage and the reference voltage, and outputs a driving voltage that is compensated with the compensation value to the gate driving circuit;
- a monitoring circuit including a plurality of resistors connected in series and a switching transistor, the switching transistor including a gate electrode connected to the plurality of resistors, a first electrode connected to a predetermined voltage, and a second electrode that outputs an enable signal that is indicative of an abnormal state of the monitoring transistor responsive to the compensated driving voltage matching a turn-on voltage of the switching transistor;
- and
- a timing controller that is connected to the monitoring circuit and is configured to control the power control circuit to switch from outputting the driving voltage that is compensated with the compensation value to outputting a predefined driving voltage to the gate driving circuit responsive to receiving the enable signal from the monitoring circuit.
4 more elements
Dependencies are inferred from the claim text.