Patent ID: 9383446
Filing Date: 2016-07-05
CPC Classification: G01S

Claim Text:
1. A motion sensor that detects the movement of an object to be detected, comprising: a plurality of first light emitting elements arranged spaced apart in the direction of movement of the object to be detected, which emit lights having mutually different characteristics in the region of movement of the object to be detected; a light receiving element, which receives reflected light that is emitted from the plurality of first light emitting elements and reflected by the object to be detected; a second light emitting element, which emits light towards the light receiving element; a separation member arranged between the plurality of first light emitting elements; and a circuit board, wherein the separation member comprises a light guiding part, which guides light emitted from the second light emitting element so as to directly irradiate the light receiving element, without passing through the region of movement of the object to be detected, and light blocking parts, which extend from the light guiding part, and block light so that light from the plurality of first light emitting elements does not directly irradiate the light receiving element, and the circuit board comprises a detection circuit, which detects the movement of the object to be detected, by way of variations in the amount of light received by the light receiving element.