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:
Jul. 05, 1994
Filed:
Aug. 24, 1993
Applicant:
Inventors:
Hiroshi Kano, Kyoto, JP;
Masakazu Asano, Neyagawa, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
F24F / ; G01B / ;
U.S. Cl.
CPC ...
236 493 ; 236 51 ; 33 / ; 356380 ;
Abstract
A system to be installed within a room for detecting indoor condition data such as the interior area of the room and the number and position of occupants therein comprises an LED array for emitting a spotlight to form a multiplicity of light spots one by one successively as dispersed on the interior surface of the room at approximately equal spacings. The spotlight is projected from the array on the interior surface and concentrated on a one-dimensional PSD upon reflection. The indoor condition data is calculated by using triangulation for the optical system and output currents of the PSD as input signals.