Lens sheet and printer

A printer capable of performing a printing of at least one of a character and an image onto a lens sheet having an external shape of a rectangle or a square defined by four sheet ends in a vertical direction thereto and including a first surface on which a plurality of lenses extending in a direction are arranged in parallel with each other, and a second surface opposite to the first surface, on which the printing is to be performed, the printer comprising:

• a deciding unit, operable to decide whether or not each of the plurality of lenses is inclined to one of the sheet ends;
• a signal generating unit, when the deciding unit decides that each of the plurality of lenses is inclined to the one of the sheet ends, based on a lens signal including a series of signals each of which has a cyclic width corresponding to a width of one of the plurality of lenses and which are successively output, operable to generate a complementary lens signal in which a first signal of the series of signals which is first output and which corresponds to a defective pulse portion is replaced by a signal which has a pulse having no defect and a width of which is the same as a width of a signal of the series of signals that is output subsequent to the first signal;
• and
• a printing unit, operable to perform the printing on the lens sheet based on the complementary lens signal.