EP0642296A3 - Process for detecting a faulty fluorescent lamp operated by high-frequency. - Google Patents
Process for detecting a faulty fluorescent lamp operated by high-frequency. Download PDFInfo
- Publication number
- EP0642296A3 EP0642296A3 EP94250220A EP94250220A EP0642296A3 EP 0642296 A3 EP0642296 A3 EP 0642296A3 EP 94250220 A EP94250220 A EP 94250220A EP 94250220 A EP94250220 A EP 94250220A EP 0642296 A3 EP0642296 A3 EP 0642296A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- detecting
- frequency
- fluorescent lamp
- lamp operated
- faulty
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/25—Circuit arrangements for protecting against overcurrent
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4330942A DE4330942C2 (en) | 1993-09-08 | 1993-09-08 | Method for detecting a defective fluorescent lamp when operating with a higher frequency voltage |
DE4330942 | 1993-09-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0642296A2 EP0642296A2 (en) | 1995-03-08 |
EP0642296A3 true EP0642296A3 (en) | 1995-07-26 |
Family
ID=6497530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94250220A Withdrawn EP0642296A3 (en) | 1993-09-08 | 1994-09-07 | Process for detecting a faulty fluorescent lamp operated by high-frequency. |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0642296A3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3521602B2 (en) * | 1996-03-06 | 2004-04-19 | 株式会社デンソー | Discharge lamp lighting device |
JP3603643B2 (en) * | 1999-02-15 | 2004-12-22 | 松下電工株式会社 | Discharge lamp lighting device |
WO2001033916A1 (en) * | 1999-11-02 | 2001-05-10 | Mitsubishi Denki Kabushiki Kaisha | Discharge lamp controlling device and discharge lamp controlling method |
EP2765329A1 (en) | 2013-02-11 | 2014-08-13 | Siemens Aktiengesellschaft | Device for the mechanical adjustment of an oscillation behaviour of a machine element |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982001276A1 (en) * | 1980-10-07 | 1982-04-15 | Grubbs C | Solid state ballast with high frequency inverter fault protection |
WO1987007995A1 (en) * | 1986-06-18 | 1987-12-30 | Innovative Controls, Inc. | A high intensity discharge lamp self-adjusting ballast system with current limiters and a current feed-back loop |
US5023516A (en) * | 1988-05-10 | 1991-06-11 | Matsushita Electric Industrial Co., Ltd. | Discharge lamp operation apparatus |
EP0576991A2 (en) * | 1992-06-30 | 1994-01-05 | Sanyo Electric Co., Ltd. | Control apparatus of fluorescent lamp |
GB2269279A (en) * | 1992-08-01 | 1994-02-02 | Coolite Ltd | Fluorescent Tube Starting and Operating Circuit |
-
1994
- 1994-09-07 EP EP94250220A patent/EP0642296A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982001276A1 (en) * | 1980-10-07 | 1982-04-15 | Grubbs C | Solid state ballast with high frequency inverter fault protection |
WO1987007995A1 (en) * | 1986-06-18 | 1987-12-30 | Innovative Controls, Inc. | A high intensity discharge lamp self-adjusting ballast system with current limiters and a current feed-back loop |
US5023516A (en) * | 1988-05-10 | 1991-06-11 | Matsushita Electric Industrial Co., Ltd. | Discharge lamp operation apparatus |
EP0576991A2 (en) * | 1992-06-30 | 1994-01-05 | Sanyo Electric Co., Ltd. | Control apparatus of fluorescent lamp |
GB2269279A (en) * | 1992-08-01 | 1994-02-02 | Coolite Ltd | Fluorescent Tube Starting and Operating Circuit |
Also Published As
Publication number | Publication date |
---|---|
EP0642296A2 (en) | 1995-03-08 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
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PUAL | Search report despatched |
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PUAF | Information related to the publication of a search report (a3 document) modified or deleted |
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D17D | Deferred search report published (deleted) | ||
PUAL | Search report despatched |
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|
17P | Request for examination filed |
Effective date: 19961220 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19990404 |