Scott J. Butler - North Oxford MA Walter P. Lapatovich - Marlborough MA Jason R. Bochinski - Springfield OR
Assignee:
GTE Products Corporation - Danvers MA
International Classification:
H05B 4124
US Classification:
315248
Abstract:
An assembly includes an electrodeless discharge lamp disposed between a pair of field applicators, and an integral impedance matching structure for matching the impedance of the lamp and field applicators to the impedance of a power source. The structure includes a Tee junction, a transmission line including a first branch connecting a first output of the Tee junction to one of the field applicators. A second branch of the transmission line connects a second output of the Tee junction to the other field applicator. The difference between electrical lengths of the first and second branches are substantially shorter than a half-wavelength. The assembly is less complex and more compact than prior art which utilizes odd mode excitation via a half-wavelength balun transformer.
Power Balanced Coupling Structure For Electrodeless Discharge Lamp
Scott J. Butler - North Oxford MA Walter P. Lapatovich - Marlborough MA Jason R. Bochinski - Springfield OR
Assignee:
Osram Sylvania Inc. - Danvers MA
International Classification:
H05B 4116
US Classification:
315248
Abstract:
An electrodeless HID lamp formed with a power balanced coupling structure is disclosed. Microwave transmission to the discharge capsule is divided into two channels having an electrical length differential of about a half wave length. A balancing strap line is coupled between the two transmission lines where they deliver power to the field applicators for the discharge capsule. The strap line balances the power delivery between the two ends of the discharge tube.
Method For Deflecting The Arc Of An Electrodeless Hid Lamp
Walter P. Lapatovich - Marlborough MA Scott J. Butler - North Oxford MA Jason R. Bochinski - Springfield OR Harold H. Goss - Pelham NH
Assignee:
Osram Sylvania Inc. - Danvers MA
International Classification:
H05B 3702 G05F 100
US Classification:
315248
Abstract:
The present invention provides a method for using electrodeless high-intensity discharge (HID) lamps for automotive headlamp and similar applications requiring high/low beam operation (first and second beam orientation) of signaling. The HID lamp is excited with a high-frequency radio frequency (rf) signal. Modulation of the radio frequency signal is used to cause the arc of the HID lamp to selectively operate at an acoustic resonance point. At such a point, the arc undergoes a perturbation and is physically displaced from its quiescent position. When the lamp is placed at a focal or light-gathering point of an optical system having forward gain, displacement of the arc away from the focal point causes discernible changes in the far-field output of the optical system.
Electrodeless High Intensity Discharge Lamp Having A Phosphorus Fill
Walter P. Lapatovich - Marlborough MA Scott J. Butler - North Oxford MA Jason R. Bochinski - Springfield OR
Assignee:
Osram Sylvania Inc. - Danvers MA
International Classification:
H01J 1720 H01J 6112 H01J 162 H01J 6304
US Classification:
313572
Abstract:
An electrodeless high intensity discharge lamp including a sealed light-transmissive envelope, a volatilizable chemical fill and an inert gas or nitrogen within the envelope. The chemical fill includes as a primary active component phosphorus or a volatilizable compound of phosphorus. The inert gas or nitrogen is at a pressure of less than 760 torr at ambient temperature, and assists in starting the lamp. Sufficient mercury may be added to the lamp fill to improve resistive heating, but addition of mercury is not required for emission. Sulfur, a sulfur compound, or a metal halide may be added to the fill as a secondary active component. The lamp envelope is coupled to a high frequency power source to produce a light emitting plasma discharge within the envelope.
Electrodeless High Intensity Discharge Lamp Energized By A Rotating Electric Field
Walter P. Lapatovich - Marlborough MA Scott J. Butler - North Oxford MA Jason R. Bochinski - Springfield OR
Assignee:
Osram Sylvania Inc. - Danvers MA
International Classification:
H05B 4124
US Classification:
315 39
Abstract:
An electrodeless high intensity discharge lamp includes a lamp capsule containing a fill material for emitting radiation upon excitation by high frequency electromagnetic energy, a plurality of applicators spaced around a lamp capsule for nonresonant coupling of high frequency energy to the lamp capsule, a high frequency source for supplying high frequency power, and a power splitter and phase shifter for coupling high frequency power from the source to the applicators such that an electric field applied to the lamp capsule rotates at the frequency of the source. The applied high frequency energy is distributed over the lamp capsule so that the tendency for lamp envelope hot spots is reduced. Preferably, four helical couplers are spaced at 90. degree. intervals around the lamp capsule.