Patent ID: 7976657

Claim:
A method for continuously manufacturing liquid-crystal display elements by laminating sheets of polarizing composite film each having a predefined length to respective ones of a plurality of liquid-crystal panels, said sheet of polarizing composite film being formed from a continuous web of an optical film laminate having a width corresponding to a long or short side of the liquid-crystal panel, the continuous web of the optical film laminate comprising a polarizing composite film with an adhesive layer and a carrier film releasably laminated to the adhesive layer, the method comprising steps of: continuously feeding a continuous web of an optical film laminate to a slitting position; measuring a feed length of the optical film laminate and calculating a length measurement data based on the feed length; detecting a mark at a position before a position where the mark reaches the slitting position while feeding the optical film laminate, the mark being provided in the optical film laminate for indicating position of defect in the polarizing composite film which is detected in a preliminary inspection; determining positions for forming slit lines on the optical film laminate in a perpendicular direction with respect to the lengthwise direction of the optical film laminate based on the detected mark and the length measurement data, sequentially forming the slit lines at a side opposite to the carrier film to a depth reaching a surface of the carrier film adjacent to the adhesive layer at the slitting position based on the determined positions for forming the slit lines, determining the polarizing composite film sheet defined between two longitudinally adjacent ones of the slit lines is a defective polarizing sheet with the mark or a normal polarizing sheet without the mark, peeling a sheet determined to be the normal polarizing sheet from the carrier film, and feeding liquid-crystal panel to a lamination position so as to be aligned with the normal polarizing sheet and laminating the normal polarizing sheet to said liquid-crystal panel.