Patent ID: 6880904

Claim:
An ink jet recording apparatus for executing recording by using a recording head, said recording head having a driver circuit for controlling the driving of said recording head, the ink jet recording apparatus comprising: a system control circuit for determining the status of said ink jet recording apparatus and for controlling said ink jet recording apparatus; an AC/DC converting circuit for converting an input AC voltage into a first DC voltage to then supply the first DC voltage to said recording head; a voltage converting circuit for converting the first DC voltage into a second DC voltage to then supply the second DC voltage to said driver circuit and said system control circuit, and for keeping the second DC voltage higher than a reset voltage of said driver circuit at least until the first DC voltage drops to a guarantee voltage of said recording head; switching means connected to a supply line of the first DC voltage, the supply line connecting the AC/DC converting circuit with said recording head, said switching means disconnecting the connection of the supply line of the first DC voltage on the basis of an OFF signal output when said system control circuit determines a predetermined status; a diode connected in parallel with said switching means in such a manner as to have a cathode thereof connected to a terminal at said AC/DC converting circuit side of said switching means and an anode thereof connected to a terminal at the recording head side of said switching means; and a capacitor connected to the supply line of said first DC voltage between said recording head and said switching means.