DRIVE CIRCUIT FOR LED HEAD

摘要

PURPOSE:To limit a signal fed from a printing control part only to printing data by adding a shift clock generating circuit for generating a shift clock synchronizing with the printing data in a LED head drive circuit. CONSTITUTION:The printing control part 1 converts the data to be printed into serial data with a preset frequency, adds a start bit of one bit to the top of the data and feeds to the LED drive circuit 2. The shift clock generating circuit 3 detects the start bit of the serial data fed from the printing control part 1, and then generates the shift clock synchronizing with the data. The LED drive circuit 2 drives the LED head 4 by the serial data fed from the printing control part 1 and the shift clock generated in the shift clock generating circuit 3. The shift clock synchronizing with the printing data is outputted from the shift clock generating circuit 3.