Device for operation of a high pressure discharge lamp

Details Device for operation of a high pressure discharge lamp Device for operation of a high pressure discharge lamp

2006-04-04

2006-04-04

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

C315S291000

Reexamination Certificate

active

07023144

ABSTRACT:
To positionally stabilize the arc spot and to prevent the formation of so-called flicker, a super-high pressure discharge lamp which is filled with greater than or equal to 0.20 mg/mm3of mercury has a feed device which supplies an alternating current with a steady-state operating frequency of from 60 Hz to 1000 Hz and a low frequency of from 5 Hz to 50 Hz. The feed device inserts the alternating current with the low frequency into the alternating current with the steady-state operating frequency with a time interval which has a length equal to at least one half period and at most to five periods, and the time interval being in the range of from 0.1 sec to 120 sec.

REFERENCES:
patent: 4705991 (1987-11-01), Ganser et al.
patent: 6359396 (2002-03-01), Wicklund et al.
patent: 6376998 (2002-04-01), Okamoto et al.
patent: 6713972 (2004-03-01), Nakagawa et al.
patent: 6888321 (2005-05-01), Arimoto et al.

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