Patent ID: 8208018

Claim:
A method for measuring brightness uniformity of a panel, the method comprising the steps of: dividing the panel into a plurality of areas; measuring brightness of each area; calculating a value K for each area, where the value K is represented by: K = ∑ n ⁢ [  L k - L n  / L n ] + ∑ m ⁢ [  L k - L m  / 2 ⁢ L m ] m + n , where L k is brightness of the area, L n is brightness of adjacent areas which are perpendicular or parallel to the area, L m is brightness of the adjacent areas which are diagonal with the area, n is the number of the adjacent areas which are perpendicular or parallel to the area, and m is the number of the adjacent areas which are diagonal with the area; and comparing the value K with a predetermined value, wherein when the value K is greater than the predetermined value, it indicates that the brightness difference between the area and the adjacent areas exceeds a uniformity threshold, and when the value K is smaller than the predetermined value, it indicates that the brightness difference between the area and the adjacent areas is below the uniformity threshold.