Patent ID: 7922276

Claim:
An ink jet printhead module adapted for use in a printing apparatus, the ink jet printhead module being capable of receiving a plurality of address signals, a selection signal, and at least one decoding control signal from a printhead drive unit of the printing apparatus, the ink jet printhead module comprising: a decoding circuit, being capable of receiving the selection signal and the decoding control signal and outputting a plurality of chip selection signals; and a plurality of chip control circuits, each of the chip control circuits being capable of receiving the address signals and a corresponding one of the chip selection signals, wherein each of the chip control circuits comprises: a plurality of switching circuits, each of the switching circuits being capable of receiving a corresponding one of the address signals and the corresponding one of chip selection signals and outputting a switching signal; and an ink jetting circuit set, including a plurality of ink jetting circuits, each of the ink jetting circuits being capable of receiving the switching signal from the corresponding switching circuit electrically coupled to the ink jetting circuit and determining whether or not to jet out ink based on the received switching signal, wherein the corresponding one of the address signals and the corresponding one of the chip selection signals have a voltage level of a logic high voltage level and a logic low voltage level, the switching signal is a logic high voltage level and selectively enables the ink jetting circuit when the corresponding one of the address signals and the corresponding one of the chip selection signals are at the logic high voltage level.