Patent ID: 8780097
Filing Date: 2014-07-15
Classification: G09G

Abstract:
1. A method for detecting newton ring mura on a display comprising: (a) sensing an image of said display with an image capture device; (b) determining a border boundary of an illuminated portion of said display; (c) spatially filtering said image, that includes sensor noise and grid pattern noise, as defined by said border boundary using a filter that reduces sensor noise and a grid pattern of said display where said filter is not further based upon contemporaneously sensing a reference image, where said filter includes a function that jointly evaluates said sensor noise and said grid pattern noise of said display; (d) processing said spatially filtered image to determine if a region proximate a pixel location is a potential newton ring mura defect; (e) characterizing said potential newton ring mura defects to remove at least one said potential newton ring mura defect.