Patent ID: 8408680

Claim:
An ink jet chip, adaptive for a printing device, at least comprising: a plurality of ink-jet heating elements; and an ink-jet signal generating circuit, at least including: a counter electrically connected with the printing device, for receiving a counter control signal, having a first counter control signal and a second counter control signal, and a pulse signal outputted from the printing device, and generating a plurality of counter signals corresponding to the counter control signal and the pulse signal; and a decoder electrically connected with the counter, for receiving and decoding the plurality of counter signals, for generating a plurality of address signals, and selecting a corresponding ink-jet heating element basing on the plurality of address signals, wherein the counter is an up/down counting counter, having both functions of counting up and counting down, and the counter switches to the function of counting up when the first counter control signal is in an enabled status and the second counter control signal is in a disabled status, and switches to the function of counting down when the first counter control signal is in a disabled status and the second counter control signal is in an enabled status.