Solid state lighting panels with variable voltage boost current sources

Patent metadata

Field	Value
Publication number	US-8941331-B2
Application number	US-201313896977-A
Country	US
Kind code	B2
Filing date	May 17, 2013
Priority date	Nov 18, 2005
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

A lighting system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.

First claim

That which is claimed is:

1. A lighting system, comprising:
at least two strings of solid state lighting devices that are respectively configured to emit at least a first light and a second light, respectively;
at least two current supply circuits coupled to first and second strings of the at least two strings, respectively, each of the current supply circuits configured to supply an on-state drive current to a respective string of the at least two strings of solid state lightin…

Assignees

• Cree Inc

Inventors

• Roberts John K
• Vadas Keith J
• Murugesu Muhinthan

Classifications

• G09G3/3406

  Physics · mapped topic

• G09G2360/145

  Physics · mapped topic

• H05B45/40

  Electricity · mapped topic

• G09G2320/0653

  Physics · mapped topic

• H05B45/22

  Electricity · mapped topic