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:
Apr. 24, 2001
Filed:
Feb. 04, 1999
Applicant:
Inventors:
Eric R. Fossum, La Crescenta, CA (US);
Gregory Waligorski, Arcadia, CA (US);
Assignee:
Photobit Corporation, Pasadena, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 5/30 ; G01J 5/60 ;
U.S. Cl.
CPC ...
G01J 5/30 ; G01J 5/60 ;
Abstract
A light-emitting diode array is driven by a digital control. The digital control modulates the pulse width of pulses applied to the light-emitting diode. The intensity of the output is controlled by controlling the width of pulses applied to the light-emitting diode. Since light-emitting diodes have very low inertial energy, this system can be rapidly turned on and turned off. The output is integrated to produce a uniform output.