DEFECT CHECKING METHOD OF A PROTECTION FILM ADHESIVE POLARIZER, ESPECIALLY REGARDING TO CHECKING A DEFECT OF A PROTECTION FILM ADHESIVE POLARIZER BY DISPOSING THE ADHESIVE POLARIZER AND A CHECKING POLARIZER BETWEEN A LIGHT SOURCE AND A CAMERA AND DECIDING WHETHER A BRIGHT PART EXISTS IN DARK IMAGE

摘要

PURPOSE: A defect checking method of a protection film adhesive polarizer is provided to decide that a bright part periodically or continuously detected from a dark image is caused by a defect of a protection film, thereby reducing time for finding a cause of the defect and preventing an inferior product from being produced. CONSTITUTION: A light emitted from a light source(22) is selectively transmitted on a polarized component of a polarized film(11). If a defect is not produced between the polarized film(11) and a checking polarizer(21), a light transmitted on a protection film adhesive polarizer is held back by the checking polarizer(21), so that an image of a camera displays a dark color. If the defect is produced, a polarized direction of a defected part is changed to display a bright part in the dark image.