Resources Contact Us Home
Electronic ballast with inverter protection and relamping circuits

Image Number 9 for United States Patent #5770925.

An electronic ballast (10) for powering at least one gas discharge lamp (20) comprising an AC-to-DC converter (100), an inverter (200), an output circuit (300), a relamping circuit (400), and an inverter protection circuit (500). Protection circuit (500) shuts down the inverter (200) in response to lamp removal or lamp failure. Following replacement of a failed lamp with an operational lamp, relamping circuit (400) provides restarting of the inverter (200) and ignition of the operational lamp by momentarily disabling the inverter protection circuit (500).

  Recently Added Patents
Visual indicator of online backup
End-of-session authentication
Solid-state imaging apparatus, method of manufacturing solid-state imaging apparatus, and electronic apparatus
Method and apparatus for variable accuracy inter-picture timing specification for digital video encoding
Opioid-ketamine and norketamine codrug combinations for pain management
Wind energy system having a connection protection device
Bird deterrent
  Randomly Featured Patents
Conveyor roller support arrangement
Method and apparatus for minimizing storage of common attachment files in an e-mail communications server
Combination personal data assistant and personal computing system dynamic memory reclamation
Apparatus and method for reducing the power consumption of an electronic device
Optical apparatus
Gas separation system
Method of beam lead bonding
Assembly for an air conditioner cabinet
Atrial defibrillator, lead systems, and method
Level controlled readout system for formatted record recorded on an optical disc