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:
May. 10, 2016
Filed:
Oct. 28, 2013
Applicant:
Nxp B.v., Eindhoven, NL;
Inventors:
Aly Aamer Syed, Deurne, NL;
Manvi Agarwal, Eindhoven, NL;
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/17 (2006.01); G01N 21/15 (2006.01); G01N 21/94 (2006.01); G01N 21/53 (2006.01);
U.S. Cl.
CPC ...
G01N 21/17 (2013.01); G01N 21/15 (2013.01); G01N 21/94 (2013.01); G01N 21/53 (2013.01); G01N 2021/157 (2013.01); G01N 2021/945 (2013.01);
Abstract
An environmental sensor is disclosed. The environmental sensor includes a semiconductor substrate including a light sensor, a surface through which ambient light can pass to reach a light sensor and a light source operable to illuminate the surface, whereby at least some of the light from the light source is reflected by the surface onto the light sensor. The environmental sensor is operable to determine the presence of a fouling layer on the surface by comparing measurements of ambient light and reflected light by the at least one light sensor.