Patent ID: 7803231

Claim:
A substrate edge part cleaning apparatus comprising: a cleaning head configured to clean an edge part of a substrate for display by wiping the edge part of the substrate while moving rectilinearly; a camera configured to move together with said cleaning head, configured to capture an image of a proximity of an edge of a color filter placed on the substrate, and configured to obtain surface status information of the substrate; an edge detection unit configured to detect a position of two corners of the edge of the color filter, based on the surface status information obtained by said camera; a substrate position recognition unit configured to derive position information of a whole edge of the color filter from the detected position of the two corners of the color filter, and configured to recognize a positional relationship between the edge of the color filter and a location of said cleaning head; and a substrate holding unit configured to adjust a position of the substrate based on (a) the derived position information of the whole edge of the color filter, and (b) the positional relationship between the edge of the color filter and the location of said cleaning head.