Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Ballast with inverter startup circuit










Image Number 2 for United States Patent #6856100.

A ballast (20, 20') includes a rectifier circuit (100), a boost converter (200, 200'), an inverter (300), an output circuit (400), and an inverter startup circuit (600). Inverter startup circuit (600) is coupled between boost converter (200) and inverter (300). During operation, inverter startup circuit (600) provides a delay period between startup of boost converter (200) and startup of inverter (300) so that startup of inverter (300) is delayed until at least such time as the DC rail voltage provided by boost converter (200) approaches its steady-state operating level. This ensures that the ballast (20,20') provides an output voltage that is sufficiently high to ignite a lamp (40) in a preferred manner, with little or no glow current and a fast strike time.








 
 
  Recently Added Patents
System and method for customized prompting
Control strategies for a multi-mode drive system
LED drive circuit
Method and arrangement for controlling semiconductor component
Optical receiver and optical transfer apparatus
Flat panel display
Apparatus for merging spatial audio streams
  Randomly Featured Patents
Thermometer
Hydraulic brake system
Heat sink
Snap action slide switch
Miniature x-ray source
Ejector pump with ringshaped nozzle
Methods and apparatus for efficient computation of one-way chains in cryptographic applications
Unified heliostat array
Apparatus and method for encoding halftone images
Method for utilizing at least one storage space sharing scheme to manage storage spaces utilized by video playback operation and related video playback apparatus thereof