EP0463387A3 - Power supply for a pre-heating device of a pre-heated display, especially of a fluorescent display - Google Patents

Power supply for a pre-heating device of a pre-heated display, especially of a fluorescent display Download PDF

Info

Publication number
EP0463387A3
EP0463387A3 EP19910108630 EP91108630A EP0463387A3 EP 0463387 A3 EP0463387 A3 EP 0463387A3 EP 19910108630 EP19910108630 EP 19910108630 EP 91108630 A EP91108630 A EP 91108630A EP 0463387 A3 EP0463387 A3 EP 0463387A3
Authority
EP
European Patent Office
Prior art keywords
display
heating device
voltage
power supply
heated
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.)
Granted
Application number
EP19910108630
Other languages
German (de)
Other versions
EP0463387B1 (en
EP0463387A2 (en
Inventor
Klaus Anders
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.)
Eaton GmbH
Original Assignee
Eaton Controls GmbH and Co KG
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 Eaton Controls GmbH and Co KG filed Critical Eaton Controls GmbH and Co KG
Publication of EP0463387A2 publication Critical patent/EP0463387A2/en
Publication of EP0463387A3 publication Critical patent/EP0463387A3/en
Application granted granted Critical
Publication of EP0463387B1 publication Critical patent/EP0463387B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B41/14—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
    • H05B41/20—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 no starting switch
    • H05B41/23—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 no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/232—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 no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
    • H05B41/2325—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 no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps 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
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling

Abstract

A power supply for a heating device (20) of a heated display (10), especially of a fluorescent display, is proposed. A DC voltage source supplies the display voltage for the display and a heating current source for the heating device is constructed as a clock device (21, 19), pulsing the display voltage. In this way, the inherently low heating voltage can be derived from the higher display voltage, it being possible to save expensive, large-volume ballast elements and reduce the power loss. <IMAGE>
EP91108630A 1990-06-29 1991-05-28 Power supply for a pre-heating device of a pre-heated display, especially of a fluorescent display Expired - Lifetime EP0463387B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4020731 1990-06-29
DE4020731A DE4020731A1 (en) 1990-06-29 1990-06-29 POWER SUPPLY DEVICE FOR THE HEATING DEVICE OF A HEATED DISPLAY, IN PARTICULAR A FLUORESCENCE DISPLAY

Publications (3)

Publication Number Publication Date
EP0463387A2 EP0463387A2 (en) 1992-01-02
EP0463387A3 true EP0463387A3 (en) 1993-01-20
EP0463387B1 EP0463387B1 (en) 1995-12-13

Family

ID=6409334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108630A Expired - Lifetime EP0463387B1 (en) 1990-06-29 1991-05-28 Power supply for a pre-heating device of a pre-heated display, especially of a fluorescent display

Country Status (3)

Country Link
EP (1) EP0463387B1 (en)
AT (1) ATE131682T1 (en)
DE (2) DE4020731A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214021A1 (en) * 1992-04-29 1992-09-24 Karl Koehl Vacuum fluorescent display panel under drive circuit control - switching heating current on half cycle basis to avoid interference with control signals
US7728528B2 (en) 2004-11-29 2010-06-01 Century Concept Ltd Electronic ballast with preheating and dimming control

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158794A (en) * 1978-07-14 1979-06-19 P. R. Mallory & Co. Inc. Drive means and method for vacuum fluorescent display systems
US4209729A (en) * 1978-06-21 1980-06-24 Texas Instruments Incorporated On chip vacuum fluorescent display drive
US4488089A (en) * 1982-02-19 1984-12-11 Sharp Kabushiki Kaisha Fluorescent indicator tube driving circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209729A (en) * 1978-06-21 1980-06-24 Texas Instruments Incorporated On chip vacuum fluorescent display drive
US4158794A (en) * 1978-07-14 1979-06-19 P. R. Mallory & Co. Inc. Drive means and method for vacuum fluorescent display systems
US4488089A (en) * 1982-02-19 1984-12-11 Sharp Kabushiki Kaisha Fluorescent indicator tube driving circuit

Also Published As

Publication number Publication date
DE4020731A1 (en) 1992-01-02
ATE131682T1 (en) 1995-12-15
EP0463387B1 (en) 1995-12-13
DE59107056D1 (en) 1996-01-25
EP0463387A2 (en) 1992-01-02

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