Patent ID: 8404334

Claim:
A roll of continuous web of optical film laminate adapted for use in a system for sequentially manufacturing liquid-crystal display elements by laminating optically functional film sheets to respective ones of liquid-crystal panels, the optically functional film sheets formed to have predefined dimensions corresponding respectively to short side and long side dimensions of a liquid-crystal panel having a predefined size, the optical film laminate in said continuous web has a longitudinal direction and a transverse direction which is perpendicular to said longitudinal direction, and comprises at least an optically functional film having an adhesive layer provided thereon and a carrier film releasably laminated on said adhesive layer, wherein said continuous web of optical film laminate in said roll is formed with a plurality of slit lines formed in said optically functional film and extending in said transverse direction throughout the width of said continuous web of optical film at longitudinally spaced positions to define a plurality of rectangular regions each being defined between two longitudinally adjacent slit lines, each of said slit lines being formed at a side opposite to said carrier film to a depth reaching the surface of said carrier film adjacent to said adhesive layer, wherein each of the rectangular regions formed in the optically functional film is either a defect-free region with no defects or a defective region having at least one defect, the defect-free region and the defect-free and defective regions are defined along the longitudinal direction in accordance with a position of a defect existing in the optically functional film and are detected through a preliminary inspection, said defect-free region having a predefined length corresponding to one of said short side or long side dimensions of said liquid-crystal panel, said defective region is defined as a region having a predefined length which is different from the length of said defect-free region, the length of the defective region being defined across said position of the defect, wherein at least one of the rectangular regions in said roll comprises at least one defect and defines said defective region; and said defect-free region defined in said optically functional film by said two longitudinally adjacent slit lines forms a defect-free normal sheet which is to be laminated to the liquid crystal panel.