Patent ID: 8328316

Claim:
An inkjet printhead used to divide a plurality of heaters into a plurality of blocks, time-divisionally drive the heaters for the respective blocks, and print on a printing medium, the printhead comprising: a serial-parallel converter which receives print data signals and block selection signals serially transferred from a printing apparatus; a latch which latches the block selection signals; a plurality of memories which correspond to the respective heaters and store block numbers for driving the respective heaters according to time-divisional driving; a plurality of comparators which are arranged in correspondence with the respective heaters, receive the block selection signals latched by said latch and the block numbers stored in said plurality of memories, and compare values of the block selection signals and values of the block numbers; and a plurality of drivers which are arranged in correspondence with the respective heaters, and drive the respective heaters in accordance with comparison results of said plurality of comparators.