PRINTER, AND METHOD FOR CONTROLLING DATA CLOCK IN PRINTER

PROBLEM TO BE SOLVED: To decrease the influence of radiation noises generated from a thermal head, a thermal head controlling part and wiring connecting them. SOLUTION: Data for performing on/off of respective thermal resistors R1-Rn are generated on every respective gradation from the first gradation to the N-th gradation by a thermal head driving data generating part 14 and are outputted as serial data. In a thermal head 40, these serial data are received, and are held at positions corresponding to respective thermal resistors R1-Rn by a shift register 41. Then, the respective thermal resistors R1-Rn are energized by the on/off data held by the shift register 41. This procedure is repeated to the N-th gradation to perform a gradation printing for one line. In addition, when the serial data are stored in the shift register 41, on respective gradations, data locking signals (CLOCK) with different frequencies are used. COPYRIGHT: (C)2007,JPO&INPIT