Patent ID: 9305765
Filing Date: 2016-04-05
CPC Classification: H01J,H05B,Y02B

Claim Text:
1. An induction RF fluorescent lamp, comprising: a bulbous vitreous portion of the induction RF fluorescent lamp comprising a vitreous envelope filled with a working gas mixture; a power coupler comprising at least one winding of an electrical conductor for receiving an alternating voltage and current to generate an alternating magnetic field and thereby inducing an alternating electric field within the vitreous envelope; and an electronic ballast providing appropriate voltage and current to the power coupler and operating at a frequency greater than 5 MHz wherein the electronic ballast comprises an EMI filter, an AC-to-DC converter, a DC bus, an input choke inductor and a DC-to-AC inverter comprising one or more inductive components; wherein the input choke inductor is located between the DC bus and the switching transistor of the DC-to-AC inverter and has a value approximately inversely proportional to the product of the square of the operating frequency of the electronic balance and the capacitance of the switching transistor.