GB1281358A - Improvements in and relating to electric discharge lamp apparatus - Google Patents
Improvements in and relating to electric discharge lamp apparatusInfo
- Publication number
- GB1281358A GB1281358A GB42575/69A GB4257569A GB1281358A GB 1281358 A GB1281358 A GB 1281358A GB 42575/69 A GB42575/69 A GB 42575/69A GB 4257569 A GB4257569 A GB 4257569A GB 1281358 A GB1281358 A GB 1281358A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thyristor
- ballast
- electrodes
- lamp
- series
- 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.)
- Expired
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
- H05B41/02—Details
- H05B41/04—Starting switches
- H05B41/042—Starting switches using semiconductor devices
- H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
-
- 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
- H05B41/02—Details
- H05B41/04—Starting switches
- H05B41/042—Starting switches using semiconductor devices
- H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
- H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices
-
- 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
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/18—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/05—Starting and operating circuit for fluorescent lamp
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
1281358 Supply circuits for discharge lamps MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 27 Aug 1969 [27 Aug 1968 4 Nov 1968] 42575/69 Heading H2H A circuit for operating a discharge lamp includes a ballast device, a pulse transformer, and a reverse blocking diode thyristor connected across the lamp electrodes. In the circuit of Fig. 1, the lamp 12 has heated electrodes 13, 14 and is connected in series with the ballast 11 across a mains supply 8. The ballast and supply are also connected in series through the electrodes with both windings of a pulse transformer 15 and a reverse blocking diode thyristor 18. In operation, the supply voltage is sufficient to break down the thyristor 18 each cycle to permit a pulse to pass through the heating electrodes. When the electrodes are sufficiently heated, the pulse is able to strike the lamp, after which the lamp running voltage is insufficient to cause the thyristor 18 to break down again. Because the thyristor 18 is of the reverse blocking type, the ballast 11 may saturate to allow increased electrode heating current. In further embodiments, Figs. 3 and 5 (not shown), a diode is connected in series with the thyristor 18. In the embodiment of Fig. 5, saturation of the ballast 11 is brought about by using an additional winding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7451168 | 1968-08-27 | ||
| JP9714668 | 1968-11-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1281358A true GB1281358A (en) | 1972-07-12 |
Family
ID=26415659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB42575/69A Expired GB1281358A (en) | 1968-08-27 | 1969-08-27 | Improvements in and relating to electric discharge lamp apparatus |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3626243A (en) |
| BE (1) | BE738004A (en) |
| DE (1) | DE1943176C3 (en) |
| FR (1) | FR2016451A1 (en) |
| GB (1) | GB1281358A (en) |
| NL (1) | NL6913049A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3824428A (en) * | 1969-07-23 | 1974-07-16 | Lutron Electronics Co | High frequency fluorescent tube lighting circuit and a-c driving circuit therefor |
| US3731142A (en) * | 1971-08-20 | 1973-05-01 | Lutron Electronics Co | High-frequency fluorescent tube lighting circuit with isolating transformer |
| US3866088A (en) * | 1971-11-29 | 1975-02-11 | New Nippon Electric Co | Discharge lamp starter device using a backswing voltage booster and characterized by the absence of a preheating function |
| USRE31486E (en) | 1974-09-30 | 1984-01-03 | Chadwick-Helmuth Company, Inc. | Rapid starting of gas discharge lamps |
| JPS57170496A (en) * | 1981-04-15 | 1982-10-20 | Hitachi Shomei Kk | Device for firing discharge lamp |
| US4572988A (en) * | 1983-08-22 | 1986-02-25 | Industrial Design Associates, (Ida) | High frequency ballast circuit |
| US4777410A (en) * | 1987-06-22 | 1988-10-11 | Innovative Controls, Inc. | Ballast striker circuit |
| US4866347A (en) * | 1987-09-28 | 1989-09-12 | Hubbell Incorporated | Compact fluorescent lamp circuit |
| US4900986A (en) * | 1988-09-06 | 1990-02-13 | General Electric Company | Ballast circuit for starting fluorescent lamps |
| US5111115A (en) * | 1990-02-05 | 1992-05-05 | Electronic & Transformer Engineering Limited | Fluorescent lamp controller |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA466135A (en) * | 1950-06-27 | Cornelis Van Looy Franciscus | Device comprising a gaseous discharge tube | |
| US3476976A (en) * | 1966-04-09 | 1969-11-04 | Matsushita Electric Works Ltd | Starting device for discharge lamp |
-
1969
- 1969-08-21 US US852009A patent/US3626243A/en not_active Expired - Lifetime
- 1969-08-25 DE DE1943176A patent/DE1943176C3/en not_active Expired
- 1969-08-26 FR FR6929222A patent/FR2016451A1/fr not_active Withdrawn
- 1969-08-26 NL NL6913049A patent/NL6913049A/xx unknown
- 1969-08-26 BE BE738004A patent/BE738004A/xx unknown
- 1969-08-27 GB GB42575/69A patent/GB1281358A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL6913049A (en) | 1970-03-03 |
| DE1943176A1 (en) | 1970-09-24 |
| US3626243A (en) | 1971-12-07 |
| DE1943176B2 (en) | 1974-05-09 |
| DE1943176C3 (en) | 1975-01-09 |
| FR2016451A1 (en) | 1970-05-08 |
| BE738004A (en) | 1970-02-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |