ELECTRODELESS DISCHARGE LAMP LIGHTING UNIT

Japanese Patent JP3419034

B2

PURPOSE: To enable a start circuit being stable in operation point without being affected by the dispersion of a circuit element by lowering the sharpness of the resonance circuit of a start circuit thereby gentling a resonance curve.
CONSTITUTION: A resistor element 15, which gentles a resonance curve by lowering the sharpness of a parallel resonance circuit 16, is connected in parallel to the said resonance circuit 16. The junction between the third capacitor 9 to serve as a high voltage generation point and a circuit part 16 is connected through an electrode 26 for start to a gas probe 14b to constitute the energy injection point for start of an electrodeless discharge lamp 14. Hereby, each resonance curve of the start current at the time of having changed the capacity Csts of the capacitor 9 and a main current become gentle as compared with a conventional resonance curve. Accordingly, in case of securing a proper start current and a main current, a range wider than a conventional start range can be gotten, and a resonance curve is gentler, so stable operation without being affected by the dispersion of capacitors 9 and 11 or a start coil 10 can be secured.

JPH10144487	DISCHARGE LAMP LIGHTING DEVICE
WO/2006/001219	DISCHARGE LAMP LIGHTING CIRCUIT
JPH11238585	DISCHARGE LAMP LIGHTING DEVICE

Kenji Araki

JP19003593A

June 23, 2003

July 30, 1993

Click for automatic bibliography generation  

Toshiba Lighting & Technology Corporation

H05B41/24; (IPC1-7): H05B41/24

JP4292899A
JP4243003A
JP6393241A
JP521422U

【文献】欧州特許出願公開520716(EP,A1)

Takashi Honda

Previous Patent: PULSE WIDTH CONTROL CIRCUIT AND PULSE WIDTH MEASURING CIRCUIT

Next Patent: PRODUCTION OF PROTEIN HYDROLYZATE