Optical sensor

摘要

Three light emitting elements and one light receiving element are provided on a surface of a substrate. The light receiving element is disposed within a first triangular region connecting the three light emitting elements. A first rectangle circumscribed around the triangular region is formed. In addition, a second rectangle circumscribed around a second triangle formed when intersections of a virtually set XY plane and optical axes of light beams emitted from the three light emitting elements are perpendicularly projected on the surface of the substrate, is formed. Directions of the light emitted from the three light emitting elements are set such that at least either one of length and breadth dimensions of the second rectangle is larger than a corresponding one of length and breadth dimensions of the first rectangle.

主权项

1. An optical sensor comprising:
a substrate; at least three light emitting elements mounted on a surface of the substrate; and at least one light receiving element located within a region of a first triangle connecting the at least three light emitting elements and mounted on the surface of the substrate, wherein the at least one light receiving element is configured to receive light emitted from the light emitting elements and reflected from a detection object so as to detect a presence and movement of the detection object, and when an X axis and a Y axis parallel to the surface of the substrate and perpendicular to each other are virtually set with respect to the at least three light emitting elements, at least either one of length and breadth dimensions of a first rectangle that has sides substantially parallel to the X axis and the Y axis and is circumscribed around a second triangle formed when intersections of a virtually set XY plane and optical axes of light beams emitted from the at least three light emitting elements are perpendicularly projected on the surface of the substrate is larger than a corresponding one of length and breadth dimensions of a second rectangle that has sides substantially parallel to the X axis and the Y axis and is circumscribed around the first triangle connecting the at least three light emitting elements.