Method of determining an aperture ratio, aperture ratio determination device and electronic device designed by the method of determining the aperture ratio

An aperture ratio determination device comprising:

• a current density ratio calculator configured to calculate a current density ratio of a pixel;
• a total stress calculator configured to calculate a total stress of the pixel based on lifetime data of the pixel and the current density ratio of the pixel;
• a threshold voltage variance calculator configured to calculate a threshold voltage variance of a driving transistor included in the pixel;
• and
• an aperture ratio determiner configured to determine an aperture ratio of the pixel based on the threshold voltage variance of the driving transistor and the total stress of the pixel.

An electronic device comprising:

• a processor configured to output an input control signal and input image data;
• a display panel comprising a pixel;
• a scan driver configured to output a scan signal to the pixel;
• a data driver configured to output a data voltage to the pixel;
• a sensing circuit connected to the pixel through a sensing line;
• and
• a driving controller configured to control the scan driver, the data driver, and the sensing circuit, based on the input control signal and the input image data,
• wherein a current density ratio of the pixel is calculated,
• wherein a total stress of the pixel is calculated based on lifetime data of the pixel and the current density ratio of the pixel,
• wherein a threshold voltage variance of a driving transistor included in the pixel is calculated, and
• wherein an aperture ratio of the pixel is determined based on a relationship between the total stress of the pixel and the threshold voltage variance of the driving transistor.