Company Filing History:
Years Active: 2012-2015
Title: Innovations by John D. Grainger
Introduction
John D. Grainger is a notable inventor based in Fremont, California. He has made significant contributions to the field of LED technology, holding a total of five patents. His work focuses on enhancing the efficiency and safety of LED bulb driver circuits.
Latest Patents
One of Grainger's latest patents is for a power factor control for an LED bulb driver circuit. This innovation involves a light-emitting diode (LED) bulb that features a shell and a base. The driver circuit within the bulb provides current to the LED and includes a power factor control circuit. This circuit has a tracking circuit that produces a signal indicative of the supply line voltage. The switch-mode power supply (SMPS) controller is designed to adjust the frequency of the output signal based on the input pin signal.
Another significant patent by Grainger is a thermal protection circuit for an LED bulb. This invention includes a driver circuit that provides current to the LED and features a thermal protection circuit. The circuit consists of two positive thermal coefficient thermistors connected in series, each with a specific switching temperature. The SMPS controller responds to the thermistors' temperatures, adjusting the output signal's duty cycle accordingly to ensure safe operation.
Career Highlights
John D. Grainger is currently employed at Switch Bulb Company, Inc., where he continues to innovate in the field of LED technology. His work has contributed to advancements in energy efficiency and safety in lighting solutions.
Collaborations
Grainger has collaborated with notable coworkers, including Stanley Canter and Ronald J. Lenk. Their combined expertise has fostered a creative environment that encourages innovation in their projects.
Conclusion
John D. Grainger's contributions to LED technology through his patents demonstrate his commitment to innovation and safety in lighting solutions. His work continues to impact the industry positively.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.