POSITION DETECTION DEVICE, SCALE, LIGHT RECEIVING ELEMENT ARRAY, AND LIQUID DISCHARGING DEVICE PROVIDED WITH POSITION DETECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a position detection device provided with a position detection device and a liquid discharge device provided with the position detection device capable of inhibiting the light to the light receiving element covered by light shielding. SOLUTION: The line pattern 54 is arranged with the light translucent part 54a and the light shielded part 54b for the light emitted from the light emission part 61 are arranged alternately, in the short direction perpendicularly crossing to the longitudinal direction, from one end to the other end of the ratios of widths of translucent parts 54a and the light shielding parts 54b are varied. The light receiving element array 65 is provided opposite to the line pattern 54, and arranged in a longitudinal direction and also provided with the plurality of light receiving elements 66 emitting electric signal corresponding to the light receiving amount. The arranged positions of the light receiving elements 66 are varied corresponding to the positions of the longitudinal direction along the short direction. COPYRIGHT: (C)2007,JPO&INPIT