Optical detection method of display device

The invention discloses an optical detection method of a display device, which comprises the following steps: the display device displays a first picture, the first picture has a first optical value, and the optical detection device measures the first picture in a first time period to obtain a first detection value; step B, the display device displays a second picture, the second picture has a second optical value, and the optical detection device measures the second picture in a second time period to obtain a second detection value; and the first optical value is larger than the second optical value and the first time period is smaller than the second time period. According to the invention, the problem of inaccurate result caused by oversaturation of a detection value due to too long detection time during detection of a bright-order picture can be avoided, and the problem of no reference due to too small detection value due to too short detection time during detection of a dark-order picture can also be avo