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. 07, 2015
Filed:
Jun. 07, 2014
Joseph D Laveigne, Buellton, CA (US);
Fouad Kiamilev, Hockessin, DE (US);
Rodney Mcgee, Georgetown, DE (US);
Nicholas Waite, Wilmington, DE (US);
Joseph D LaVeigne, Buellton, CA (US);
Fouad Kiamilev, Hockessin, DE (US);
Rodney McGee, Georgetown, DE (US);
Nicholas Waite, Wilmington, DE (US);
Other;
Abstract
Drive circuit () for LED thermal emitters in pixel elements of an infrared scene projector (IRSP). At least two current sources (Q, Q, Q) provide output currents (I, I, I) which may be summed and provided to a single LED (), or provided independently to two or more LEDs (A,B). The current sources may have different gains (G, G, G), and different turn-on voltages (Voffset). This allows for different resolutions for different ranges of apparent temperatures, such as high resolution in a low range and low resolution in a high range, thereby facilitating a digital implementation of the drive circuit(s).