Patent ID: 7365760

Claim:
A recording head for recording an image on a recording material comprising: a head substrate having heat radiation property; an element substrate fixed to said head substrate; plural heating elements formed on said element substrate; at least one driver IC, attached to said element substrate, for driving and heating said heating elements; at least one temperature sensor, attached to said element substrate, for measuring temperature near said heating elements, a heat quantity of each of said heating elements being adjusted in accordance with the measured temperature, wherein said plural heating elements are arranged linearly along a width direction crosswise to a feeding direction of said recording material, said at least one driver IC is a plurality of driver ICs arranged in said width direction, wherein said recording head is a thermal head, and wherein the recording head further comprises a capacitor, said capacitor and said at least one temperature sensor being connected in parallel to said plural heating elements, said temperature being measured by the following steps: charging said capacitor; discharging said capacitor to a predetermined potential through said temperature sensor; and calculating a resistance value of said temperature sensor based on time taken for discharging, said resistance value changing in accordance with temperature.