Patent ID: 8113610
Filing Date: 2012-02-14
Classification: B41J

Abstract:
1. A fluid ejection device, comprising: an ejection module for ejecting a fluid; an optical sensor for detecting an edge of a target based on a variation in an output voltage obtained in response to a light level of a received reflected light which is emitted to the target on a platen under the optical sensor; a carriage module for mounting the ejection module and the optical sensor and moving the ejection module and the optical sensor in a horizontal direction while causing the ejection module to eject the fluid onto the target; a memory module for storing information regarding a design basis range of a mounting position in an up-down direction of a predetermined element member provided within a detection coverage area of the optical sensor; and a determination module for controlling the optical sensor and the carriage module to detect an edge of the element member when an instruction to measure the mounting position of the element member is issued, measuring the mounting position in the up-down direction of the element member based on the output voltage of the optical sensor changing with movement of the carriage module and determining, based on the measured mounting position and the information regarding the design basis range stored on the memory module, whether a mounting position in the up-down direction of the element member falls within the design basis range.