Patent ID: 8172355

Claim:
A liquid discharge head comprising: a plurality of heat elements for generating thermal energy used for discharging the liquid; a plurality of temperature detecting elements connected to each other in parallel to detect a temperature, each of the temperature detecting elements being provided in a position corresponding to one of the heat elements; a plurality of first switching elements, each of the first switching elements being used for connecting a corresponding one of the temperature detecting elements; a temperature detecting circuit used for detecting temperature information from the temperature detecting elements connected by the first switching elements; a plurality of second switching elements, each of the second switching elements being used for connecting a corresponding one of the heat elements; and a control circuit for controlling one of the first switching elements and one of the second switching elements corresponding to one of the heat elements in synchronism with each other, wherein the control circuit includes a first portion for forming a first control signal for controlling the one of the first switching elements using a selected signal and outputting the first control signal to the one of the first switching elements, and a second portion for forming a second control signal for controlling the one of the second switching elements using the selected signal and outputting the second control signal to the one of the second switching elements.