| 摘要 |
<p>PURPOSE:To obtain high-quality printing wherein the center of each dot is on straight line by providing a controller to work in which a way the center points of light emitting time of each light source are all on the same timing. CONSTITUTION:The A-input of a comparison circuit 16 is connected to the output of a luminout time setting register 17, and B-input is also connected to the output of an up-down counter 18. The output QC of the circuit 16 becomes 'H' level and is connected to one input of AND circuit 15. The other input of the circuit 15 is connected to picture element input signal S4, and to make LED element 13 a lighting mode, the signal S4 is made to 'H' and 'AND' of the output QC of the circuit 16 is obtained by the circuit 15. Only when both the inputs are on 'H', a current amplifier 14 on the following stage is made to active state. Light can thus be given off by making the center values of light emitting time equal only for predetermined luminous time.</p> |
