Patent ID: 7862139
Filing Date: 2011-01-04
Classification: B41J

Abstract:
1. A method of adjusting a level of a detection signal output from an optical sensor in accordance with a state of a target object in a liquid ejecting apparatus, the method comprising: providing the optical sensor so as to include a light emitting element operable to irradiate the detected object and a light receiving element operable to detect a light amount which varies in accordance with the state of the target object; outputting the detection signal from the optical sensor, based on the detected light amount; adjusting an output gain of the light receiving element in a case where it is impossible to cause the level of the detection signal to fall within the prescribed range; and adjusting luminance of the light emitting element based on the detection signal, so that the level of the detection signal falls within a prescribed range, after the output gain of the light receiving element is adjusted.