Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Lighting circuit for electric discharge lamp










Image Number 15 for United States Patent #4544862.

A lighting circuit for an electric discharge lamp according to the present invention is constructed in such a way that a switching device is provided at an output terminal of a high frequency inverter which produces a substantially sinusoidal output voltage, and that, by controlling this switching device, an output to the low pressure electric discharge lamp is stopped at the rising part of the abovementioned output voltage in its half cycle, while the output is supplied to the low pressure electric discharge lamp at the voltage level in the vicinity of the maximum instantaneous value thereof. By use of the high frequency inverter of a smaller capacity and less radio noise than those in the conventional device, the operating efficiency of the low pressure electric discharge lamp can be increased.








 
 
  Recently Added Patents
Digital display
Developing device
Mask blank, transfer mask, and film denseness evaluation method
Method and apparatus for controlled reoxygenation
Image forming apparatus acquiring image processing time detected when the acquired time is longer that the previously set time and to correct output image density using generated patch pattern
Touch screen tablet
Dynamic web page construction based on determination of client device location
  Randomly Featured Patents
Methods and compositions for detecting thyroglobulin in a biological sample
Method and system for utilizing smart antennas establishing a backhaul network
Fuel-injection pump for internal combustion engine
Disposable markers adapted for constant width and close proximity tracing
Trash can safety handle
Floppy disc loading apparatus
Compositions for dynamic balancing
Surface acoustic wave device and environmental difference detecting apparatus using the surface acoustic wave device
Fifth wheel hitch system
Method of molding tubular laminate