LIQUID CRYSTAL MASK, LIQUID CRYSTAL LASER MARKER AND MARKING METHOD USING THE SAME

摘要

According to the present invention, no gap occurs in the joint between in the joint between adjacent blocks when a design is marked in several blocks. In a liquid crystal laser marker for making a liquid crystal mask (2) with a plurality of pixels display a design to be marked to work pieces and transmitting a laser beam through the liquid crystal mask to a work piece so that the design will be marked on the work piece, the liquid crystal mask is such that the pixels at all or part of the outermost sides have a size different from the inner pixels. The liquid crystal laser marker further includes a controller (11), when a design is divided into several blocks (1, 1, 1) and one of the blocks is displayed on the liquid crystal mask, which controls the liquid crystal mask such that a marking position of the block currently displayed on the liquid crystal mask overlaps a marking position of a block adjacent to the currently-displayed block by a given length (L1, L2) of a portion where the outermost pixels have a size different from the inner pixels of the liquid crystal mask. A liquid crystal mask the pixels of which have the same size may be used. In this case, the controller controls the liquid crystal mask such that a marking position of a block currently displayed on the liquid crystal mask overlaps a marking position of a block adjacent to the currently-displayed block by a given length (L3, L4) of a portion corresponding to part of the outermost pixels of the liquid crystal mask.