| 摘要 |
PURPOSE:To obtain a recording with uniform density regardless of an adjacent dot heating by a method wherein a shift register which acts to both directions is employed, while a recording data is shifted by one dot distance to right and left directions, and a preheated driving of a thermal head is performed by heating for each thermal element. CONSTITUTION:As a shift register SR' to store recording data DATA of one line, a form of register which acts to both directions and also EX.OR gate G1', G2'... are provided. A data is stored in a shift register SR' which is shifted leftward by one dot for a dot pattern to be recorded. A strobe signal SB2 is fed to EX.OR gates G1, G2... of L level, and a strobe signal SB of H level is fed to AND gates G1, G2..., thereby a heat generating element is driven corresponding to a blank data, thus the first step preheating is performed. Then, the second step preheating is successively performed in the same manner by a pattern shifted rightward by one dot for a pattern to be recorded. |
