Patent ID: 9715843
Date: 2017-07-25
CPC Classifications: G09G

Claim:
1. A method of estimating an image sticking grade of a display, comprising steps of: displaying a first image in a first frame and a second image in a second frame on the display; switching the display, at at least two sampling times, to display the first image, and then obtaining brightness change factors and image sticking area factors for an image sticking displayed on the display at each sampling time to determine at least two image sticking grades corresponding to each sampling time, wherein an image sticking fading period is set as interval time between two adjacent sampling times to perform an image sticking fading process of the display; determining a change trend of the image sticking grades of the display during the image sticking fading process based on the at least two image sticking grades when the image sticking stops fading; and identifying defects caused in the image sticking during displaying process of the display, wherein if it is shown from the change trend that the image sticking grade of the display is faded too fast, defects resulted by deficiency of alignment stability of liquid crystal of the display are considered; and if it is shown from the change trend that the image sticking grade of the display is faded too slowly, defects caused by too big residual direct current component in the liquid crystal or too low reliability are considered.