Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2000-09-27
2001-11-13
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S308000, C315S360000, C315S362000, C315SDIG007
Reexamination Certificate
active
06316887
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a circuit for controlling an electronic ballast IC to drive a high intensity discharge lamp.
2. Description of the Related Art
The IR2157-1 IC is a ballast IC manufactured by International Rectifier Corporation of El Segundo, Calif., and is described and claimed in U.S. application Ser. No. 09/225,635, filed Jan. 5, 1999, now U.S. Pat. No. 6,211,623 the disclosure of which is herein incorporated by reference. The IR2157-1 IC operates in accordance with a state diagram to switch between various phases including strike, pre-heat, run, overtemperature, etc. External circuitry and selected components are used to set the operating frequency of the lamp and other parameters.
It would be desirable to provide additional external circuitry, which operates in conjunction with the above-mentioned external circuitry, for striking the lamp up to 20 times or until the lamp is lit.
SUMMARY OF THE INVENTION
The present invention achieves the foregoing objective by providing a ballast control circuit for a high intensity discharge lamp which operates in conjunction with an existing ballast IC and serves to strike the lamp up to 20 times or until the lamp is lit.
Other features and advantages of the invention will become apparent when the following description read in conjunction with the accompanying drawings.
REFERENCES:
patent: 5545955 (1996-08-01), Wood
patent: 5563477 (1996-10-01), Ribarich et al.
patent: 6111365 (2000-08-01), Mirskiy et al.
patent: 6150773 (2000-11-01), Ribarich
patent: 6188183 (2001-02-01), Greenwood et al.
patent: 6211623 (2001-04-01), Wilhelm et al.
Marenche Robert
Ribarich Thomas J.
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Philogene Haissa
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