Image forming system, integrated circuit chip, and image forming apparatus

摘要

An integrated circuit chip configured to be connected to an image forming apparatus having a light source, a photosensitive member, and a light receiver includes a synchronizing signal output circuit, a data output circuit, an OR circuit, a chip-side communicator, first and second wiring lines. The synchronizing signal output circuit is configured to output a synchronizing signal for lighting the light source. The data output circuit is configured to output an image data signal for lighting the light source. The OR circuit is configured to output a lighting signal that is a logical sum of the synchronizing signal and the image data signal. The chip-side communicator is configured to transmit the lighting signal to the image forming apparatus. The first wiring line connects the synchronizing signal output circuit with the OR circuit. The second wiring line connects the data output circuit with the OR circuit.

主权项

1. An image forming system comprising:
an integrated circuit chip; and an image forming apparatus configured to be connected to the integrated circuit chip, the image forming apparatus comprising:
a light source;a motor;a rotating member configured to be rotated by the motor and to reflect a light beam emitted from the light source;a photosensitive member configured to be irradiated by the light beam reflected by the rotating member;a light receiver configured to receive the light beam reflected by the rotating member;a rotation controller configured to control rotation of the motor, by switching a signal for controlling rotation of the motor between a frequency signal having frequency depending on a rotational speed of the motor and an output signal that is outputted in response to reception of the light beam by the light receiver; a first wiring line configured to connect the light receiver with the rotation controller; an apparatus-side communicator configured to transmit the output signal to the integrated circuit; a second wiring line configured to connect the light receiver with the apparatus-side communicator; and a third wiring line configured to connect the apparatus-side communicator with the rotation controller, the integrated circuit chip comprising:
a synchronizing signal output circuit configured to output a synchronizing signal for lighting the light source;a data output circuit configured to output an image data signal for lighting the light source;an OR circuit configured to output, to the light source, a lighting signal that is a logical sum of the synchronizing signal and the image data signal; a chip-side communicator electrically connectable to the apparatus-side communicator, the chip-side communicator being configured to transmit the lighting signal to the image forming apparatus through the apparatus-side communicator; and
an instruction signal output circuit configured to output an instruction signal to the rotation controller in response to input of the output signal; and a fourth wiring line configured to connect the instruction signal output circuit with the chip-side communicator, wherein the rotation controller is arranged outside the integrated circuit chip and inside the image forming apparatus; wherein the instruction signal output circuit is configured to output the instruction signal to the rotation controller through the fourth wiring line, the chip-side communicator, the apparatus-side communicator, and the third wiring line; and wherein, in response to input of the instruction signal in a state where the motor is rotated based on the frequency signal, the rotation controller is configured to switch the signal for controlling rotation of the motor to the output signal that is received from the light receiver through the first wiring line.