Display device and driving method thereof
AssigneeLG Display Co., Ltd.
InventorsJinsol Choi, Mookyoung Hong
Life of this patent
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Abstract
Aspects relate to a display device and driving method thereof. A display device includes a display panel including a sub-pixel and displaying an image in units of frames, a data driver including a driving circuitry applying data voltage to the sub-pixel during an active time displaying an image within one frame and a sensing circuitry sensing the sub-pixel during the active time, and a timing controller detecting a defect of the display panel based on a sensing result of the sensing circuitry, wherein the frame includes an active time for display the image and a blank time for sensing a characteristic value of the sub-pixel, and the timing controller turns on the sampling switch at least one time during the active time.
Claims18
A display device comprising:
- a display panel including a plurality of sub-pixels, the display panel configured to display an image in units of frames, each of the plurality of sub-pixels including a first transistor connected to be controlled by a scan signal and a second transistor connected to be controlled by a sensing signal;
- a data driver including:
- driving circuitry that, in operation, applies a data voltage to a sub-pixel of the plurality of sub-pixels during an active time of displaying a frame of the units of frames of the image;
- and
- sensing circuitry including a sampling switch controlling a connection between the plurality of sub-pixels and the sensing circuitry and configured to, in operation, sense the sub-pixel during the active time;
- and
- a timing controller that, in operation, detects a defect of the display panel based on comparing a sensing result of the sensing circuitry with a target voltage selected based on a data voltage applied during the active time,
- wherein the active time includes:
- a first period during which the scan signal at a first turn-on level and the sensing signal at a second turn-on level, the data voltage, and a reference display voltage are applied to the sub-pixel;
- a second period, subsequent to the first period, during which the scan signal and the sensing signal remain on respective turn-on levels, application of the reference display voltage is interrupted;
- and
- a third period, subsequent to the second period, during which the scan signal at a first turn-off level and the sensing signal at a second turn-off level are applied to the sub-pixel and the sampling switch is turned on.
A method, comprising:
- providing a display device including a display panel having a plurality of sub-pixels therein;
- applying data voltage to a sub-pixel of the plurality of sub-pixels by driving circuitry of a data driver, the data voltage being applied to the sub-pixel during an active time of one frame of displaying an image;
- sensing an electrical signal output from the sub-pixel by sensing circuitry of the data driver, the electrical signal output being sampled as a sensing voltage by turning on a sampling switch during the active time, the sampling switch being configured to switch a connection between the sub-pixel and the sensing circuitry;
- and
- comparing the sensing voltage with a target voltage selected based on the data voltage applied during the active time.
A display device, comprising:
- a display panel having a plurality of sub-pixels, the display panel configured to display images in units of frames, each frame including an active time followed by a blank time;
- a reference voltage line associated with the sub-pixel;
- a data driver including:
- driving circuitry that, in operation, outputs a data voltage to a data line coupled to the sub-pixel;
- and
- sensing circuitry that, in operation, generates sensing data by sampling an electrical signal on the reference voltage line during a third period in which the reference voltage line is electrically floating;
- a power controller that, in operation, generates a first reference voltage during the active time and generates a second reference voltage during the blank time;
- and
- a timing controller that, in operation, detects a defect of the display panel based on the sensing data.
Dependencies are inferred from the claim text.