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. 28, 2020
Filed:
Nov. 07, 2018
Continental Automotive Systems, Inc., Auburn Hills, MI (US);
Irving Morales Rodriguez, Guadalajara, MX;
Antonio Corona Franco, Tlajomulco de Zuniga, MX;
Marcela Fernandez, Zapopan, MX;
Jose Francisco Richardt Osuna, Guadalajara, MX;
Continental Automotive Systems, Inc., Auburn Hills, MI (US);
Abstract
The color generated by two differently-colored LEDs is maintained over time and different temperatures by sensing their combined output color using two phototransistors having different spectral sensitivities the output voltages of which are correlated to a desired output color. As the combined output color changes, the phototransistors' output voltages will change. The currents provided to the LEDs can thereafter be adjusted to maintain the output voltages and thus maintain the combined output color.