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:
Jan. 28, 2020
Filed:
Jun. 14, 2017
Code 3, Inc., St. Louis, MO (US);
Richard Nelson Brower, St. Louis, MO (US);
Code 3, Inc., St. Louis, MO (US);
Abstract
In connection with a ground transportation vehicle light head () powered by a battery-based voltage source () supplying positive () and reference (i.e., ground) () voltages that define a voltage difference () applied across a number of multiple series-connected high-power light-emitting diodes (HP LEDs) () and current regulator circuitry () electrically connected to them, ultra-low dropout circuit techniques are disclosed for increasing a portion of the voltage difference available from the battery-based voltage source to forward bias and thereby maximize the number of the multiple series-connected HP LEDs emitting light by maintaining a low voltage drop () across the current regulator circuitry. By maintaining the low voltage drop and making available from the battery-based voltage source an increased portion of the voltage difference, at least one additional HP LED is capable of being forward biased to thereby maximize the number of multiple series-connected HP LEDs emitting light from the light head.