Patent ID: 7794039
Filing Date: 2010-09-14
Classification: B41J

Abstract:
1. A recording apparatus comprising: a recording head configured to be used in forming an image onto a recording medium; a conveyance roller configured to convey the recording medium; a carriage configured to reciprocate, wherein the recording head is mounted on the carriage; a platen configured to support the recording medium at a position that is opposed to a position of the carriage; and an optical sensor unit that is disposed on the carriage and configured to emit a quantity of light to read patterns recorded on the recording medium with the recording head so as to automatically adjust a registration operation of a recording position, wherein the optical sensor unit includes a light emission portion configured to emit a quantity of light as a light emitting quantity and a light receiving portion configured to receive a quantity of reflected light from at least each of the recording medium and the platen, wherein the optical sensor unit is configured to detect an end portion in a width direction of the recording medium supported by the platen while being moved from a position opposed to the recording medium to a position not opposed to the recording medium, wherein the light emission portion is configured to emit a larger quantity of light when the optical sensor unit is detecting the end portion in the width direction of the recording medium than when reading the patterns recorded on the recording medium, and wherein, when the optical sensor unit is detecting the end portion, the light emitting quantity from the light emission portion is increased to a quantity at which an output of the light receiving portion is saturated by the reflected light received from the recording medium and is not saturated by the reflected light received from the platen.