Patent ID: 9230316
Filing Date: 2016-01-05
CPC Classification: G06T

Claim Text:
1. A defect inspection method for a display panel, comprising: A) obtaining an edge image of a display panel by scanning and capturing an image at an edge side of the display panel according to a preset parameter and obtaining a grayscale value of each pixel of the edge image; B) selecting a specific area in the edge image and obtaining a grayscale value of each pixel in the specific area; C) averaging the grayscale values of all pixels in the specific area to obtain an average grayscale value of all pixels in the specific area; D) executing binarization for the grayscale value of each pixel in the specific area to obtain some boundary lines based on the average grayscale value, wherein the grayscale values of pixels on the boundary lines are different from grayscale values of the other pixels which are not on the boundary lines; E) filtering horizontal and vertical lines of the boundary lines to obtain some remaining boundary lines, wherein, the remaining boundary lines do not include the horizontal lines of the boundary lines and the vertical lines of the boundary lines; and F) fitting a defect specification line for the remaining boundary lines, wherein, if a width of a remaining boundary line is not smaller than a width of the defect specification line, confirming that the remaining boundary line is a defect line.