| 摘要 |
<p>PURPOSE:To obtain a recording density in proportion to gradation data with a simple constitution by using a sub-clock to obtain a time interval so that the recording density of the image data can correspond to the gradation data. CONSTITUTION:Delaying lines 312(1)-312(6) are hung to a clock 1 to occur from a printing clock circuit 311, a clock(clock to dislocate for the prescribed time interval respectively from a constant time interval t07) to make the interval into the prescribed time interval t01-t06) is prepared, and a subclock 2 is sent by a logical OR. Occurring time intervals t01-t07 of the sub-clock 2 change the light emitting time of an LED array 26 so as to correspond to the characteristic of the gradation data. Thus, the recording density to change equally approximately in a proportion condition to the gradation data can be obtained. Thus, the recording density corresponding to the gradation data can be obtained by the easy and small constitution.</p> |
