| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a processing method excellent in the adhesiveness of a sheet material when a plurality of optical sheets are laminated to be compounded with each other and a manufacturing method of an optical sheet for display suitable for a liquid crystal display device or the like. <P>SOLUTION: The manufacturing method of the optical sheet for display in one embodiment includes a lamination process for superposing a plurality of the optical films (112 and 114) one upon another and a joining process for irradiating at least one area of the laminate of the optical films (112 and 114) superposed upon another in the lamination process with a laser beam (117) from at least one side of the laminate to bond the irradiated area and obtaining the composite optical sheet wherein a plurality of the optical sheets are integrated. Further, a mode for adding a process which forms a photothermal conversion layer comprising a light absorbing material between the optical sheets to be welded is also preferable. Furthermore, a mode using an ultrasonic welding method in place of the laser welding method or in combination with it is also possible. <P>COPYRIGHT: (C)2007,JPO&INPIT |
