| 摘要 |
PURPOSE:According to the size of electrical signal, transmitting timing to an ink head is delayed. By doing so, ink drip on the printing paper is equally stuck and then printing discrepancy due to the difference of ink injection speed is to be prevented. CONSTITUTION:For example, a video signal Vp1 is transmitted to a delay circuit 12 beforehand and it is compared with minimum signal Vp4. At this time, a syncronizing signal Tp1 being transmitted is delayed by a delaying time d1 through the comparison with the signal Vp1 and then it is output to a switching circuit 13 as a delaying signal Dp1. On the other hand, the signal Vp1 is amplified at an amplification circuit 10 and it is transmitted to an ink head 11 as pulse shaled head transmitting signal Hp1. After that, a maximum ink drip I1 is injected to the printing paper with the speed V1 from the orifice. Then, as the same, an ink drip I2 is injected by a video signal Vp2. At this time, V1 is greater than V2 and ink drip can be stuck in the designated position. |
