GB1276522A - Discharge lamp lighting apparatus - Google Patents

Discharge lamp lighting apparatus

Info

Publication number
GB1276522A
GB1276522A GB36647/69A GB3664769A GB1276522A GB 1276522 A GB1276522 A GB 1276522A GB 36647/69 A GB36647/69 A GB 36647/69A GB 3664769 A GB3664769 A GB 3664769A GB 1276522 A GB1276522 A GB 1276522A
Authority
GB
United Kingdom
Prior art keywords
discharge
lamp
controlled
main
negative electrode
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
Application number
GB36647/69A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1276522A publication Critical patent/GB1276522A/en
Expired legal-status Critical Current

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
    • H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices
    • 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
    • Y10S315/01—Fluorescent lamp circuits with more than two principle electrodes
    • 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
    • Y10S315/04—Dimming circuit for fluorescent lamps
    • 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
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1276522 Control circuits for discharge lamps MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 21 July 1969 [23 July 1968 14 Aug 1968] 36647/69 Heading H2H [Also in Division H4] A discharge lamp has one hot negative electrode and two positive electrodes, an auxiliary discharge being generated between the negative electrode and one of the positive electrodes. A control arrangement operates to apply an intermittent D.C. voltage across the negative electrode and the other positive electrode in order to modulate the light output. In the embodiment shown in Fig. 5, the brilliance of a lamp 31 is controlled by pulse amplitude modulation. An abnormal glow discharge is maintained between the heated cathode 32 and auxiliary anode 34 by a source 45. The main discharge between the cathode 32 and main anode 33 is controlled by a modulator circuit 43, the input for which may be a video signal in a television system. An input pulse is stored in a capacitor 38 and amplified by transistors 35, 36 so that lighting current can flow to the lamp from source 49 through the transistor 36 and a brilliance control resistor 44. The lamp is switched off by applying a gating pulse to a thyristor 39 which then discharges the capacitor 38. Several lamps of different colours may be combined into a unit in a display device and modulated at high frequencies. In an alternative embodiment, Fig. 7 (not shown), the duration of the main discharge is controlled by the height of the input pulse, the arrangement including an R.C. time constant circuit, an amplifier and a Zener diode clipper. In another embodiment, Fig. 3 (not shown), the main discharge is controlled by a series combination of a thyristor and a switching transistor connected across the main electrodes and a D.C. source.
GB36647/69A 1968-07-23 1969-07-21 Discharge lamp lighting apparatus Expired GB1276522A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5206868 1968-07-23
JP5791368 1968-08-14

Publications (1)

Publication Number Publication Date
GB1276522A true GB1276522A (en) 1972-06-01

Family

ID=26392671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36647/69A Expired GB1276522A (en) 1968-07-23 1969-07-21 Discharge lamp lighting apparatus

Country Status (5)

Country Link
US (1) US3611024A (en)
DE (1) DE1937032B2 (en)
FR (1) FR2013527A1 (en)
GB (1) GB1276522A (en)
NL (1) NL6911201A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4555302A (en) * 1984-08-24 1985-11-26 Urbanik John C Method and apparatus for ultrasonic etching of printing plates
US4920300A (en) * 1987-05-12 1990-04-24 Thorn Emi Plc Power supply
GB2230662A (en) * 1989-02-23 1990-10-24 Matsushita Electric Works Ltd DC discharge lamp lighting device

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753040A (en) * 1971-12-10 1973-08-14 Ims Corp Fluorescent lamp strobing circuit
US3936696A (en) * 1973-08-27 1976-02-03 Lutron Electronics Co., Inc. Dimming circuit with saturated semiconductor device
US4158793A (en) * 1977-07-11 1979-06-19 Lewis Gary D Gas discharge lamp control circuit
US4286195A (en) * 1979-07-05 1981-08-25 Vultron, Inc. Dimmer circuit for fluorescent lamps
US4383202A (en) * 1980-12-22 1983-05-10 General Electric Company Flashing florescent lamps
DE3100177A1 (en) * 1981-01-07 1982-08-05 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for igniting and operating a low-pressure discharge lamp from a direct current source
US4654562A (en) * 1984-12-21 1987-03-31 The Gerber Scientific Instrument Co. Flashing lamp unit
US4651060A (en) * 1985-11-13 1987-03-17 Electro Controls Inc. Method and apparatus for dimming fluorescent lights
US4739227A (en) * 1986-09-26 1988-04-19 General Electric Company Fluorescent lamp dimming over large light output range
US5107183A (en) * 1989-10-16 1992-04-21 Minipilo Electric Co., Ltd. Discharging method and small fluorescent lamp using the discharging method
US5068577A (en) * 1990-11-19 1991-11-26 Integrated Systems Engineering, Inc. Constant current drive system for fluorescent tubes
US5150018A (en) * 1991-08-12 1992-09-22 North American Philips Corporation Gas discharge lamp with grid and control circuits therefor
US6072284A (en) * 1998-07-20 2000-06-06 Duro-Test Corporation Three-way compact fluorescent lamp ballast and lamp holder incorporating same
US8570053B1 (en) 2007-07-03 2013-10-29 Cypress Semiconductor Corporation Capacitive field sensor with sigma-delta modulator
US8089289B1 (en) * 2007-07-03 2012-01-03 Cypress Semiconductor Corporation Capacitive field sensor with sigma-delta modulator
US9807841B2 (en) 2012-07-12 2017-10-31 Hubbell Incorporated Circuit for expanding the dimming range of an LED lamp

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899021A (en) * 1928-12-15 1933-02-28 Rca Corp Glow lamp circuit
US2972707A (en) * 1954-10-18 1961-02-21 Electro Voice Image reproducing device
DE1134760B (en) * 1960-01-18 1962-08-16 Patra Patent Treuhand Circuit arrangement for operating high-pressure discharge lamps with rectangular current pulses
US3066241A (en) * 1960-11-18 1962-11-27 Sylvania Electric Prod Apparatus for operating gaseous discharge lamps from a d.c. source
US3265930A (en) * 1962-05-03 1966-08-09 Gen Electric Current level switching apparatus for operating electric discharge lamps
US3263125A (en) * 1963-05-01 1966-07-26 Gen Electric Current limiting circuits and apparatus for operating electric discharge devices and other loads
US3471747A (en) * 1967-02-02 1969-10-07 Gen Motors Corp Starting circuit and solid state running circuit for high pressure arc lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4555302A (en) * 1984-08-24 1985-11-26 Urbanik John C Method and apparatus for ultrasonic etching of printing plates
US4920300A (en) * 1987-05-12 1990-04-24 Thorn Emi Plc Power supply
GB2230662A (en) * 1989-02-23 1990-10-24 Matsushita Electric Works Ltd DC discharge lamp lighting device
GB2230662B (en) * 1989-02-23 1993-10-06 Matsushita Electric Works Ltd Device for lighting a dc discharge lamp

Also Published As

Publication number Publication date
DE1937032B2 (en) 1971-09-09
US3611024A (en) 1971-10-05
DE1937032A1 (en) 1970-02-26
NL6911201A (en) 1970-01-27
FR2013527A1 (en) 1970-04-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years