GB2478700A - Compact fluorescent lamp operable by different power sources - Google Patents

Compact fluorescent lamp operable by different power sources Download PDF

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Publication number
GB2478700A
GB2478700A GB1004071A GB201004071A GB2478700A GB 2478700 A GB2478700 A GB 2478700A GB 1004071 A GB1004071 A GB 1004071A GB 201004071 A GB201004071 A GB 201004071A GB 2478700 A GB2478700 A GB 2478700A
Authority
GB
United Kingdom
Prior art keywords
circuit assembly
transformer
compact fluorescent
fluorescent lamp
power sources
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Withdrawn
Application number
GB1004071A
Other versions
GB201004071D0 (en
Inventor
Wen-Hsin Chao
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1004071A priority Critical patent/GB2478700A/en
Publication of GB201004071D0 publication Critical patent/GB201004071D0/en
Publication of GB2478700A publication Critical patent/GB2478700A/en
Withdrawn legal-status Critical Current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
    • H05B41/26—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
    • H05B41/2825—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 by means of a bridge converter in the final stage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/026—Fastening of transformers or ballasts
    • 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
    • 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
    • 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
    • H05B41/2821—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 by means of a single-switch converter or a parallel push-pull converter in the final stage
    • 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
    • H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • 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
    • H05B47/29—Circuits providing for substitution of the light source in case of its failure
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

A compact fluorescent lamp (CFL) includes a circuit assembly 2 comprising a rectifier 21, a plurality of capacitors 22, a plurality of ICs 23, a plurality of inductors 24, a transformer 25 for converting AC to DC, a plurality of diodes 26 and a PCB 27. A CFL 1 is electrically connected to the circuit assembly and a shade 4 encloses the CFL. A housing 3 is provided for mounting the circuit assembly 2 therein. The circuit assembly is operable when voltage variation is between 2.5 and 21 V. The lamp can operate from one of three different power sources e.g., DC power supply, electronic transformer, and electrical transformer. The transformer may be by-passed when DC is supplied to the circuit assembly directly.

Description

Title: COMPACT FLUORESCENT LAMP OPERABLE BY DIFFERENT
POWER SOURCES
The invention relates to compact fluorescent lamps and more particularly to such a compact fluorescent lamp being operable in one of three different power sources (e.g., DC power supply, electronic transformer, and electrical transformer).
Halogen lamps are widely used in automobiles, outdoor lighting, indoor lighting, etc. For example, as shown in FIGS. 1 and 2 it is often that at least two halogen lamps I aie installed in a store window for illuminating the display of goods.
Halogen lamps may get hotter than regular incandescent lamps because the heat is concentrated on a smaller envelope surface, and because the surface is closer to an internal tungsten filament. This high temperature is essential to their operation.
However, people in a room lit by halogen lamps may feel a degree of discomfort because of the high temperature. Moreover, they are not energy saving lighting sources.
Thus, the need for improvement still exists.
It is therefore an aim of the invention to provide a compact fluorescent lamp which avoids the disadvantages of the known lamps.
According to the invention, there is provided a compact fluorescent lamp comprising a circuit assembly comprising a rectifier, a plurality of capacitors, a plurality of ICs, a plurality of inductors, a transformer for converting AC to DC, a plurality of diodes, and a PCB; a CFL electrically connected to the circuit assembly; a shade for enclosing the CFL; and a housing for mounting the circuit assembly therein.
Preferably, the lamp can operate in one of three different power sources (e.g., DC power supply, electronic transformer, and electrical transformer).
The invention will now be described in detail, by way of example, with reference to the drawings in which:-FIG. 1 is a perspective view of a conventional halogen lamp; FIG 2 is an environmental view of two halogen lamps illuminating the display of goods in a store window; FIG 3 is a perspective view of a compact fluorescent lamp according to the invention; FIG 4 is an exploded perspective view of the compact fluorescent lamp with the shade and the housing removed; FIG. 5 is a block circuit diagram of the compact fluorescent lamp and a power supply; FIGS. 6 and 7 are perspective views respectively showing assembly of the compact fluorescent lamp and the power supply; and FIG 8 is an environmental view of two compact fluorescent lamps illuminating the display of goods in a store window.
Referring to FIGS. 3 to 8, a compact fluorescent lamp in accordance with the invention comprises the following components as discussed in detail below.
A compact fluorescent light bulb (CFL) 1 is electrically connected to the front end of a circuit assembly 2. Both the CFL 1 and the circuit assembly 2 are enclosed by a front cylindrical shade 4 and a rear cylindrical housing 3 respectively.
The circuit assembly 2 comprises a rectifier 21, two capacitors 22, two ICs (integrated circuits) 23, two inductors 24, a transformer 25 for converting AC (alternating current) to DC (direct current), a plurality of diodes 26, and a printed circuit board (PCB) 27. All the above components of the circuit assembly 2 are electrically connected together.
Electrical connections of the circuit assembly 2 can be explained as follows. As shown in FIG 2, the circuit assembly 2 comprises a rectification unit A, an energy store and transfer unit B, a filter circuit C, a driving circuit D, a feedback circuit E, a pulse-width modulation (PWM) circuit F, a start up and auxiliary power supply circuit G and a slope compensation circuit H. In one preferred embodiment as discussed herein, a DC power supply 5 capable of converting AC into DC is provided. The DC power supply 5 has a socket 51 connected to the base of the housing 3 so that DC can be supplied from the power supply 5 to the circuit assembly 2 via the socket 51. In this case, the transformer 25 is bypassed.
Alternatively, the DC power supply 5 is replaced with an electronic transformer of high operating frequency (e.g., in the range of 18 KHz to 500 KI-Iz) in another preferred embodiment. The electronic transformer is a step-down transformer, i.e. decreasing AC voltage and current values.
Still alternatively, the DC power supply 5 is replaced with an electrical transformer of low operating frequency in still another preferred embodiment. The electrical transformer is a step-down transformer, i.e. decreasing AC voltage and current values.
In the above two cases, the transformer 25 is activated to convert AC to DC with decreased DC voltage and current values.
Advantageously, the circuit assembly 2 can operate normally when voltage variation is in the range of 2.5 to 21 V. In brief, the CFL 1 can illuminate normally in each of the above three power sources (i.e., DC power supply, electronic transformer, and electrical transformer).
While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention as set forth in the claims.
GB1004071A 2010-03-11 2010-03-11 Compact fluorescent lamp operable by different power sources Withdrawn GB2478700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1004071A GB2478700A (en) 2010-03-11 2010-03-11 Compact fluorescent lamp operable by different power sources

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1004071A GB2478700A (en) 2010-03-11 2010-03-11 Compact fluorescent lamp operable by different power sources

Publications (2)

Publication Number Publication Date
GB201004071D0 GB201004071D0 (en) 2010-04-28
GB2478700A true GB2478700A (en) 2011-09-21

Family

ID=42261434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1004071A Withdrawn GB2478700A (en) 2010-03-11 2010-03-11 Compact fluorescent lamp operable by different power sources

Country Status (1)

Country Link
GB (1) GB2478700A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748380A (en) * 1983-09-27 1988-05-31 North American Philips Corporation Compact fluorescent lamp assembly having improved thermal dissipation and RFI suppression
US5734229A (en) * 1995-11-29 1998-03-31 Bavaro; Joseph P. Back-up electrical system for portable table lamps
EP1416517A2 (en) * 2002-10-31 2004-05-06 Murata Manufacturing Co., Ltd. Fluorescent lamp lighting device
US20050116604A1 (en) * 2003-12-02 2005-06-02 Andrzej Bobel Energy efficient compact fluorescent reflector lamp
US20070188103A1 (en) * 2002-10-04 2007-08-16 International Rectifier Corporation Dimmable fluorescent lamp package
GB2466647A (en) * 2008-12-31 2010-07-07 Kaoyi Electronic Co Ltd A fluorescent lamp with detachable ballast and reflective shade

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748380A (en) * 1983-09-27 1988-05-31 North American Philips Corporation Compact fluorescent lamp assembly having improved thermal dissipation and RFI suppression
US5734229A (en) * 1995-11-29 1998-03-31 Bavaro; Joseph P. Back-up electrical system for portable table lamps
US20070188103A1 (en) * 2002-10-04 2007-08-16 International Rectifier Corporation Dimmable fluorescent lamp package
EP1416517A2 (en) * 2002-10-31 2004-05-06 Murata Manufacturing Co., Ltd. Fluorescent lamp lighting device
US20050116604A1 (en) * 2003-12-02 2005-06-02 Andrzej Bobel Energy efficient compact fluorescent reflector lamp
GB2466647A (en) * 2008-12-31 2010-07-07 Kaoyi Electronic Co Ltd A fluorescent lamp with detachable ballast and reflective shade

Also Published As

Publication number Publication date
GB201004071D0 (en) 2010-04-28

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)