Defect detection method of display device and defect detection apparatus of display device

A defect detection apparatus of a display device, comprising:

• a defect number determining section that measures a feature amount for each partial region of the display device, and counts a number of defects in a partial region which is determined as a defective region based on the measured feature amount of the partial region, and determines whether the number of defects is greater than a first threshold value;
• and
• a defect density determining section that calculates the number of defects existing in a predetermined area when the defect number determining section determines that the number of defects is smaller than the first threshold value, and determines whether the number of defects existing in the predetermined area is greater than a second threshold value.

A defect detection apparatus of a display device, comprising:

• a defect density determining section that measures a feature amount for each partial region of the display device, counts a number of defects in the partial region which is determined as a defective region based on the measured feature amount of the partial region, calculates the number of defects existing in a predetermined area if the number of defects in the partial region of the display device is smaller than a first threshold value, and determines whether the number of defects existing in the predetermined area is greater than a second threshold value.