Electric lamp and discharge devices: systems – Discharge device load – Plural cathode and/or anode discharge device load
Patent
1983-09-12
1985-07-16
Dixon, Harold
Electric lamp and discharge devices: systems
Discharge device load
Plural cathode and/or anode discharge device load
315165, 315173, 315290, 315350, 315351, H01J 1104
Patent
active
045299145
ABSTRACT:
A high intensity discharge (HID) lamp has an arc tube including a pair of main electrodes and at least one auxiliary electrode or probe, wherein a high frequency (HF) high voltage is applied to the probe for forming a high frequency (HF) ignition discharge for establishing a low frequency (LF) arc discharge between the main electrodes. In this ignition system, the electrodes of the arc tube are arranged so that an LF discharge path and an HF discharge path are positioned in an X- or a Y-configuration in the arc tube for causing easy lamp ignition. Also, to simplify the outer leads, it is desirable to mount the probe on one of the main electrodes by a dielectric member opposite another main electrode thereby to form a shorter gap between the probe and the other main electrodes than that between the main electrodes. The starting device of HID lamps has a high frequency-high voltage (HF-HV) generator, the output of which is applied, directly or indirectly, to the probe. Accordingly, sure ignition and hot-restrike can be achieved by applying through the outer leads a superimposed voltage including the source voltage and the HF-HV.
REFERENCES:
patent: 1877716 (1932-09-01), Claude
patent: 2840761 (1958-06-01), Williams et al.
patent: 3320476 (1967-05-01), Beese
patent: 3758818 (1973-09-01), Kaneda
patent: 4072878 (1978-02-01), Engel et al.
patent: 4079292 (1978-03-01), Kaneda
patent: 4403173 (1983-09-01), Mayer
Dixon Harold
Fasse W. G.
Kane, Jr. D. H.
NEC Home Electronics Ltd.
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