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:
Dec. 16, 2014
Filed:
Jun. 09, 2011
Applicants:
David Tio Castro, Heverlee, BE;
Aurelie Humbert, Brussels, BE;
Inventors:
David Tio Castro, Heverlee, BE;
Aurelie Humbert, Brussels, BE;
Assignee:
NXP, B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 31/00 (2006.01); G01J 5/38 (2006.01); G01J 1/42 (2006.01); G01N 17/04 (2006.01);
U.S. Cl.
CPC ...
G01J 5/38 (2013.01); G01J 1/42 (2013.01); G01N 17/043 (2013.01);
Abstract
The light dose received by perishable goods is an important parameter in determining the lifetime of those goods. A light sensor is described having a photosensitive element which changes its material property according to the light dose received. This change can be detected electrically by electrodes in the light sensor. Because the change in material property is permanent, this removes the need for a memory to store a value representing the light dose received by the light sensor.