Detection method and detection device of display panel
AssigneeBoe Technology Group Co., Ltd.
InventorMingyi Zhu
Life of this patent
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Abstract
A detection method and a detection device of a display pane are provided. The detection method includes: detecting an actual value of an electric signal at a first electrode of a driving transistor in each of pixel units when the display panel reaches target brightness, the electric signal including a current signal and/or a voltage signal; and determining according to the actual value of the electrical signal corresponding to each of the pixel units, whether each of the pixel units is defective. The present disclosure may help an operator determine if each of the pixel units is defective quickly.
Claims18
A detection method of a display panel, the display panel comprising a plurality of pixel units, each of the plurality of pixel units comprising a light emitting diode and a pixel circuit for driving the light emitting diode, the pixel circuit comprising a driving transistor with a first electrode of the driving transistor connected to the light emitting diode, the detection method comprising steps of:
- detecting, by a detector, an actual value of an electric signal at the first electrode of the driving transistor in each of the plurality of pixel units when the display panel reaches target brightness, and
- determining, by an analyzer, according to the actual value of the electrical signal corresponding to each of the plurality of pixel units, whether each of the plurality of pixel units is defective,
- wherein before the step of detecting, by a detector, an actual value of an electric signal at the first electrode of the driving transistor in each of the plurality of pixel units when the display panel reaches target brightness, the detection method further comprises steps of:
- obtaining, by a theoretical data obtaining device, a theoretical data voltage of each of the plurality of pixel units according to the target brightness;
- obtaining, by a threshold obtaining device, a threshold voltage of the driving transistor in each of the plurality of pixel units;
- calculating, by a target data obtaining device, a sum of the threshold voltage of the driving transistor in each of the plurality of pixel units and the theoretical data voltage of the pixel unit, as a target data voltage corresponding to the pixel unit;
- and
- providing, by a data driver, each of the plurality of pixel units with a respective target data voltage so that the display panel reaches the target brightness.
A detection device of a display panel, the display panel comprising a plurality of pixel units, each of the plurality of pixel units comprising a light emitting diode and a pixel circuit for driving the light emitting diode, the pixel circuit comprising a driving transistor with a first electrode of the driving transistor connected to the light emitting diode, the detection device comprising:
- a detector, configured to detect an actual value of an electric signal at the first electrode of the driving transistor in each of the plurality of pixel units when the display panel reaches target brightness, and
- an analyzer, configured to determine, according to the actual value of the electrical signal corresponding to each of the plurality of pixel units, whether each of the plurality of pixel units is defective,
- wherein the detection device further comprises:
- a theoretical data obtaining device, configured to obtain a theoretical data voltage of each of the plurality of pixel units according to the target brightness;
- a threshold obtaining device, configured to obtain a threshold voltage of the driving transistor in each of the plurality of pixel units;
- a target data obtaining device, configured to calculate a sum of the threshold voltage of the driving transistor in each of the plurality of pixel units and the theoretical data voltage of the pixel unit, as a target data voltage of the pixel unit;
- and
- a data driver, configured to provide each of the plurality of pixel units with a respective target data voltage so that the display panel reaches the target brightness.
Dependencies are inferred from the claim text.