Patent ID: 11930576
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 7:
8. The image forming device according to claim 3,
wherein the second voltage conversion circuit comprises a detection signal output terminal configured to output the detection signal,
wherein the detection signal output terminal of the second voltage conversion circuit exhibits high impedance, when the third voltage is equal to or greater than the particular voltage necessary for driving the LED head,
wherein the LED controller board comprises a pull-up resistor, end of the pull-up resistor being electrically connected to the control wiring, an other end of the pull-up resistor being electrically connected to the detection signal output terminal,
wherein the main controller comprises a switching element, one end of the switching element being grounded, an other end of the switching element being electrically connected to the detection signal output terminal,
wherein, in a case where the detection signal output terminal exhibits high impedance:
the Low signal is input to the LED controller when the switching element is in an ON state; and
the High signal is input to the LED controller when the switching element is in an OFF state, and

wherein, in a case where the detection signal is the Low signal, the Low signal is input to the LED controller regardless of whether the switching element is in the ON state or the OFF state.