Title:
IMAGE FORMING DEVICE
Document Type and Number:
Japanese Patent JPH04323668
Kind Code:
A
Abstract:
PURPOSE: To realize an image forming device in which countermeasure for noise is improved with inexpensive and compact system constitution and consequently the detecting accuracy of original density is improved.
CONSTITUTION: A light receiving sensor S for detecting reflected light from an original, an amplifier 2 which amplifies a weak analog signal being the detection signal of the sensor S to a specified level, an A/D converter 3, and a light receiving sensor unit 1 consisting of a CPU 4, etc., being the center of control are made to one chip to be mounted on a substrate 1a. Communication between the unit 1 and an external control substrate 70 is performed through a digital communication channel 11 and a control signal line 12.
Inventors:
OKANO TOKIYUKI
ONISHI KAZUYUKI
ONISHI KAZUYUKI
Application Number:
JP9225391A
Publication Date:
November 12, 1992
Filing Date:
April 23, 1991
Export Citation:
Assignee:
SHARP KK
International Classes:
G03B27/72; G03G15/00; G03G15/04; G03G15/043; G03G21/00; H04N1/00; H04N1/028; H04N1/40; (IPC1-7): G03B27/72; G03G15/00; G03G15/04; H04N1/40
Attorney, Agent or Firm:
Shusaku Yamamoto