| 摘要 |
PURPOSE:To make it possible to enhance printing quality, by operating a heat accumulation state by applying emphasis corresponding to the change of an interval time to heat hystory information with due regard to a circumference while controlling electric energy to each heat generating element on the basis of the operated value and previous recording pulse amplitude. CONSTITUTION:Present, previous and further-previous image informations stored in a first - a third line buffers 20-22 are inputted to a Zi-operator 30 and a weight value corresponding to an interval time due to a Ii-operator 31 is added to image information in a wt. value adding circuit 32 while treated information is converted to heat accumulation state information in consideration of a circumferential heat generating element in a converter circuit 33 and an operator 60 calculates the recording pulse amplitude information Ti of each dot on the converted information and the recording pulse amplitude information Ti-1 of the pre-scanning line. On the other hand, an image signal operator 70 at first outputs the present time image signal as it is from the line buffer 20 as information Vi and, subsequently, information with 0.6mSec or more and, further, information with 0.7mSec or more are extracted up to 1.2mSec on the basis of information Ti to output information V1. By this method, good printing quality free from density irreqularity is obtained. |
