The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2006
Filed:
Jun. 30, 2003
Masashi Sano, Kyoto, JP;
Masashi Sano, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A reflective sensor detects the presence of a subject at a detecting position. The sensor has a sensor portion and a filter. The sensor portion includes a light-emitting element that emits light at the detecting position and a light-receiving element that receives light reflected from the subject, and generates an electrical signal corresponding to a quantity of received light. The filter is between the sensor portion and the detecting position, is made of a material that transmits light heading to the detecting position from the light-emitting element and light heading to the light-receiving element from the subject, and prevents intrusion of dust. A filter surface facing the sensor portion is tapered and has an inclined plane opposing the light-emitting element, another inclined plane opposing the light-receiving element, and a ridge portion where the inclined planes meet. The ridge portion extends between the light-emitting element and the light-receiving element.
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