Patent ID: 11902476
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B  G | IPC G  H

Claim 11:
12. A method implementable on an inspection device, the inspection device comprising a reader comprising a light source and a light receiving element, a white reference section, and a memory storing reference data of a white pixel value, the method comprising:
causing the light source to emit light toward the white reference section, and receive a pixel signal output from the reader when the light receiving element receives reflected light from the white reference section, the pixel signal concerning a pixel value according to a light quantity of the reflected light received by the light receiving element;
determining a rate of decrease in the pixel value relative to the reference data, based on the received pixel signal;
when the rate of decrease is equal to or higher than a first threshold, outputting an instruction signal concerning an instruction to clean the reader;
after outputting the instruction signal, again receive a pixel signal output from the cleaned reader when the light receiving element of the cleaned reader receives reflected light from the white reference section to re-determining the rate of decrease in response to receiving input of a completion signal concerning completion of cleaning of the reader; and
updating the reference data using the re-determined rate of decrease.