| 摘要 |
PURPOSE:To reduce processing time for software and improve the execution of printing speed by performing a thinning-out operation on continuous dot information by using hardware. CONSTITUTION:A dot information signal 10 is entered into a register 1 through a gate circuit 2, and another input signal through the gate circuit 2 is a signal which has passed through a gate circuit 3 with a high-speed printing mode control signal 14. If said signal is in 'active' state, the logic of contents stored in the register 1 is reversed and output, then it is subjected to a logic product arithmetic operation with a signal 10 at the gate circuit 2 and input in the register 1. Output data 11 from the gate circuit 2 contain no dots, if an output from the register 1 indicates contained dots, and also the signal 10 indicates contained dots. On the other hand, the output of the gate circuit 2 contains the same as the signal 10, if the output of the register 1 indicates no contained dots. The register 1 maintains the output of the gate circuit 2 and said output is used as a head drive signal. The operation is performed in accordance with a signal 12, and the signal 10 is temporarily stored by the register 1. At the same time, the signal 10 is compared to a next signal to thin out dots and the thinned-out dots are output as non-continuous dot information. |
