| 摘要 |
<p>PURPOSE:To eliminate the light and shade of a reproduced image or variance in reproduced color by inputting a fetch signal generated on the basis of the input timing of image signal data to a main counter and an address generator and resetting them. CONSTITUTION:The main counter 13 is reset with the fetch signal and the address generator 14 accesses the 1st address of a buffer 15. Consequently, a dither threshold value selected by a threshold generator 11 and the address of the buffer 15 correspond to each other without fail. Further, the address of the buffer 15 and the storage position of a register 3 correspond to each other and transfer timing from the buffer 15 to the register 3 corresponds to an H voltage applied to the common electrodes C1 and C2 of a thermal head. Therefore, a binary image signal after binary coding processing based upon the specific dither threshold is printed whenever the H voltage is applied to specific one of the common electrodes C1 and C2. Therefore, such trouble that the same input image is reproduced to different density is eliminated.</p> |
