Image quality inspection system and image synthesis method

An image quality inspection system that can obtain high resolution images, comprising:

• a camera section (19) with a built-in image element to capture image contrast data of a display panel (10) to be inspected;
• a rotating plate (14) holding optical filters in order to capture the image contrast data through optical filters;
• an optical lens section (13) having a focal adjustment mechanism for forming an image on the camera section (19);
• two plane parallel plates (11, 12) for a X direction and a Y direction which allow an image of the display plate to be moved based on thickness and rotating tilt angles of the plane parallel plates (11, 12);
• a plurality of motors (15, 16, 17) that rotate the rotating plate (14), the plane parallel plates (11, 12) for the X and Y directions;
• a motor control section (18) that controls the plurality of motors (15, 16, 17);
• an A/D conversion section (20) that converts the image contrast data output from the camera section (19) to digital signals;
• an image memory (21) that stores the contrast data converted to the digital signal;
• an image synthesis memory (22) that performs an image fitting process in accordance with image motion controls in the X and Y directions by the plane parallel plates and produces a single image of the image element;
• a CPU control section (23) that controls an image synthesis process in the image synthesis memory and processes the image synthesis data and detects image defects in the display panel.