EP1615255A2 - Fluorescent lamp - Google Patents

Fluorescent lamp Download PDF

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Publication number
EP1615255A2
EP1615255A2 EP05106230A EP05106230A EP1615255A2 EP 1615255 A2 EP1615255 A2 EP 1615255A2 EP 05106230 A EP05106230 A EP 05106230A EP 05106230 A EP05106230 A EP 05106230A EP 1615255 A2 EP1615255 A2 EP 1615255A2
Authority
EP
European Patent Office
Prior art keywords
tube
lamp
lamp tube
stem cap
wire
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Withdrawn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
EP05106230A
Other languages
German (de)
French (fr)
Other versions
EP1615255A3 (en
Inventor
Onn Fah MASS TECHNOLOGY Foo (H.K.) Ltd.
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.)
Mass Technology HK Ltd
Original Assignee
Mass Technology HK 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 Mass Technology HK Ltd filed Critical Mass Technology HK Ltd
Publication of EP1615255A2 publication Critical patent/EP1615255A2/en
Publication of EP1615255A3 publication Critical patent/EP1615255A3/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/33—Special shape of cross-section, e.g. for producing cool spot
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury

Definitions

  • This present invention relates to a fluorescent lamp and, in particular, a fluorescent lamp using new cold-end technology or an enveloped fluorescent lamp with high surface load.
  • Existing fluorescent lamps are commonly made up of lamp tube 1, cathode 2, wire 3 and stem cap 5 as shown in FIG. 1.
  • this type of fluorescent lamp one end of the wire connected to the cathode is fixed on the stem cap and the other end of the wire is led out from the lamp tube.
  • the whole inner tube of the fluorescent lamp forms a discharge space, such that mercury-vapor pressure is commonly adjusted by partial tube wall at the coldest point; hence, its shortcomings include (1) relatively small adjustment range: it is impossible to have good effect if condition seriously departs from the norm; (2) difficult to make working state adjustment based on the intersectional effect between amalgam and tube wall at the coldest point for the fluorescent lamp using amalgam.
  • the object of the present invention is to provide a fluorescent lamp with optimal capability for adjusting mercury-vapor pressure inside the lamp tube.
  • the fluorescent lamp of the present invention is mainly compact fluorescent lamp or enveloped fluorescent lamp with high surface load.
  • the new cold-end technology is applied to the lamp tube.
  • the present invention includes lamp tube, cathode, stem cap and wire.
  • this fluorescent lamp one end of the wire connected to the cathode is fixed firmly on the stem cap and the other end of the wire is led out from the lamp tube.
  • At least one cavity tube connecting through the lamp tube is disposed on the side of at least one lamp tube.
  • the stem cap and amalgam which is in the stem cap may be disposed in at least one cavity tube; preferably, the stem cap and amalgam are disposed at one end of the cavity tube.
  • the cathode, stem cap and wire may be disposed in at least one cavity tube, and one end of the wire connected to the cathode is fixed on the stem cap and the other end of the wire is led out from the cavity tube; preferably the stem cap is disposed at one end of cavity tube.
  • the cathode, stem cap, amalgam and wire may be disposed in at least one cavity tube, and one end of the wire connected to the cathode is fixed on the stem cap and the other end of the wire is led out from the cavity tube; amalgam is in the stem cap; preferably the stem cap and amalgam are disposed at one end of cavity tube.
  • the structures of the fluorescent lamp of the present invention may be applied on the lamp tubes with different diameters and shapes, such as fluorescent lamps with commonly used diameters of 6-25mm, and with different shapes, such as tubular-type, U-type, H-type, ⁇ -type, Buddha's Hand-shape-type, W-type, and SL-type, etc.
  • the advantages of the present invention includes: (1) the temperature of cavity tube is not influenced directly with electrical arc since there is no discharge through appended cavity tube, thus the real anercury-vapor pressure adjustment with cold-end is made; furthermore, mercury-vapor pressure is decreased greatly on energy saving lamps with high power or lamps in high environmental temperature; (2) by adjusting the length and/or position of cavity tube, mercury-vapor pressure in the lamp tube can be varied efficiently based on the operational condition; (3) if amalgam is required for the lamp tube, the adjustment work becomes easy and efficient by positioning the amalgam at the coldest point; with adding auxiliary cathode selectively, good luminous flux is formed rapidly when the lamp is turned on initially; (4) the effective service life of the lamp tube is lengthened since the harmful materials to luminous flux output produced during lamp operation are collected at cold-end of the cavity tube.
  • a parallel cavity tube 4 is disposed on the side of the lamp tube 1 based on the existing compact fluorescent lamp shown in FIG 1 in the Application Example 1 of the present invention.
  • the cavity tube 4, which is shorter than lamp tube 1 but has same diameter as lamp tube 1, is connected through the lamp tube 1.
  • At least one U-type lamp tube may be applied on lamp tube 1.
  • this Example is similar to Application Example 1, except that stem cap 5 is disposed on one end of the cavity tube 4 connecting to lamp tube 1, and amalgam 6 is disposed in the stem cap 5.
  • this example is similar to Application Example 2, except that cathode 2 (heating filament may be applied) is disposed on the stem cap 5; one end of the wire 3 connected to the cathode 2 (or heating filament) is fixed on the stem cap 5 and the other end of the wire 3 is led out from cavity tube 4 connecting to the lamp tube 1; the stem cap 5 and amalgam 6 which is in the stem cap 5, are disposed at one end of cavity tube 4.
  • cathode 2 heating filament may be applied
  • this Example is similar to Application Example 3, except that there is no amalgam in the stem cap 5.
  • the lamp tube 1 is connected through cavity tube 4 and cathode 2 is disposed on the stem cap.
  • this Example is similar to Application Example 1, except that a W-type lamp tube 9 is applied. Furthermore, the diameter of cavity tube appended on side of the lamp tube is shorter than that of lamp tube.
  • this Example is similar to Application Example 2, except that a SL-type lamp tube 10 is provided.
  • this Example is similar to Application Example 3, except that a 2 ⁇ -type lamp tube 11 is provided.
  • This Example is similar to Application Example 4, except that a H-type or Buddha's Hand-shape-type lamp tube is provided.

Landscapes

  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The present invention relates to a fluorescent lamp using new cold-end technology or an enveloped fluorescent lamp with high surface load. The present invention is comprised of a lamp tube, cathode, stem cap and wire, such that one end of the wire connected to the cathode is fixed on the stem cap and the other end of the wire is led out from the lamp tube. At least one cavity tube connecting through the lamp tube is disposed on side of at least one lamp tube. Advantages of the fluorescent lamp includes: (1) the temperature of cavity tube is not influenced directly with electrical arc since there is no discharge through appended cavity tube, thus mercury-vapor pressure adjustment with cold-end is made possible; furthermore, mercury-vapor pressure is decreased significantly on energy saving lamps with high power or lamps in high environmental temperature; (2) by adjusting the length and/or position of cavity tube, mercury-vapor pressure in the lamp tube can be adjusted efficiently; (3) if amalgam is required for the lamp tube, the adjustment work becomes easy and efficient by positioning the amalgam at the coldest point; with adding auxiliary cathode selectively, good luminous flux is formed rapidly when the lamp is turned on initially; (4) the effective service life of the lamp tube is lengthened since the harmful materials to luminous flux output produced during lamp operation are collected at the cold-end of cavity tube.

Description

    FIELD OF THE INVENTION
  • This present invention relates to a fluorescent lamp and, in particular, a fluorescent lamp using new cold-end technology or an enveloped fluorescent lamp with high surface load.
    • BACKGROUND OF THE INVENTION
  • Existing fluorescent lamps are commonly made up of lamp tube 1, cathode 2, wire 3 and stem cap 5 as shown in FIG. 1. With this type of fluorescent lamp, one end of the wire connected to the cathode is fixed on the stem cap and the other end of the wire is led out from the lamp tube. As a result, the whole inner tube of the fluorescent lamp forms a discharge space, such that mercury-vapor pressure is commonly adjusted by partial tube wall at the coldest point; hence, its shortcomings include (1) relatively small adjustment range: it is impossible to have good effect if condition seriously departs from the norm; (2) difficult to make working state adjustment based on the intersectional effect between amalgam and tube wall at the coldest point for the fluorescent lamp using amalgam.
    • SUMMARY OF THE INVENTION
  • The object of the present invention is to provide a fluorescent lamp with optimal capability for adjusting mercury-vapor pressure inside the lamp tube. The fluorescent lamp of the present invention is mainly compact fluorescent lamp or enveloped fluorescent lamp with high surface load. In order to achieve the foregoing object, the new cold-end technology is applied to the lamp tube.
  • The present invention includes lamp tube, cathode, stem cap and wire. In this fluorescent lamp, one end of the wire connected to the cathode is fixed firmly on the stem cap and the other end of the wire is led out from the lamp tube. At least one cavity tube connecting through the lamp tube is disposed on the side of at least one lamp tube. The stem cap and amalgam which is in the stem cap may be disposed in at least one cavity tube; preferably, the stem cap and amalgam are disposed at one end of the cavity tube. The cathode, stem cap and wire may be disposed in at least one cavity tube, and one end of the wire connected to the cathode is fixed on the stem cap and the other end of the wire is led out from the cavity tube; preferably the stem cap is disposed at one end of cavity tube. The cathode, stem cap, amalgam and wire may be disposed in at least one cavity tube, and one end of the wire connected to the cathode is fixed on the stem cap and the other end of the wire is led out from the cavity tube; amalgam is in the stem cap; preferably the stem cap and amalgam are disposed at one end of cavity tube.
  • The structures of the fluorescent lamp of the present invention may be applied on the lamp tubes with different diameters and shapes, such as fluorescent lamps with commonly used diameters of 6-25mm, and with different shapes, such as tubular-type, U-type, H-type, π-type, Buddha's Hand-shape-type, W-type, and SL-type, etc.
  • The advantages of the present invention includes: (1) the temperature of cavity tube is not influenced directly with electrical arc since there is no discharge through appended cavity tube, thus the real anercury-vapor pressure adjustment with cold-end is made; furthermore, mercury-vapor pressure is decreased greatly on energy saving lamps with high power or lamps in high environmental temperature; (2) by adjusting the length and/or position of cavity tube, mercury-vapor pressure in the lamp tube can be varied efficiently based on the operational condition; (3) if amalgam is required for the lamp tube, the adjustment work becomes easy and efficient by positioning the amalgam at the coldest point; with adding auxiliary cathode selectively, good luminous flux is formed rapidly when the lamp is turned on initially; (4) the effective service life of the lamp tube is lengthened since the harmful materials to luminous flux output produced during lamp operation are collected at cold-end of the cavity tube.
    The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings.
    • BRTEF DESCRIPTION OF THE FIGURES
    • FIG 1 is a schematic view of prior art compact fluorescent lamp.
    • FIG 2 is a schematic view of Example 1 of the present invention.
    • FIG. 3 is a schematic view of Example 2 of the present invention.
    • FIG 4 is a schematic view of Example 3 of the present invention.
    • FIG 5 is a schematic view of Example 4 of the present invention.
    • FIG 6 is a schematic view of W-type lamp tube in Application Example 5 of the present invention.
    • FIG. 7 is a left-side view of FIG. 6.
    • FIG 8 is a top view of FIG 6.
    • FIG. 9 is a schematic view of SL-type lamp tube in Application Example 6 of the present invention.
    • FIG 10 is a left-side view of FIG 9.
    • FIG. 11 is a top view of FIG 9.
    • FIG 12 is a schematic view of 2π-type lamp tube in Application Example 7 of the present invention.
    • FIG 13 is a left-side view of FIG. 12.
    • FIG 14 is a top view of FIG 12.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Application Example 1
  • Referring to FIGS. 1 and 2, a parallel cavity tube 4 is disposed on the side of the lamp tube 1 based on the existing compact fluorescent lamp shown in FIG 1 in the Application Example 1 of the present invention. The cavity tube 4, which is shorter than lamp tube 1 but has same diameter as lamp tube 1, is connected through the lamp tube 1. At least one U-type lamp tube may be applied on lamp tube 1.
    • Application Example 2
  • Referring to FIG. 3, this Example is similar to Application Example 1, except that stem cap 5 is disposed on one end of the cavity tube 4 connecting to lamp tube 1, and amalgam 6 is disposed in the stem cap 5.
    • Application Example 3
  • Referring to FIG 4, this example is similar to Application Example 2, except that cathode 2 (heating filament may be applied) is disposed on the stem cap 5; one end of the wire 3 connected to the cathode 2 (or heating filament) is fixed on the stem cap 5 and the other end of the wire 3 is led out from cavity tube 4 connecting to the lamp tube 1; the stem cap 5 and amalgam 6 which is in the stem cap 5, are disposed at one end of cavity tube 4.
    • Application Example 4
  • Referring to FIG 5, this Example is similar to Application Example 3, except that there is no amalgam in the stem cap 5. The lamp tube 1 is connected through cavity tube 4 and cathode 2 is disposed on the stem cap.
    • Application Example 5
  • Referring to FIGS. 6 to 8, this Example is similar to Application Example 1, except that a W-type lamp tube 9 is applied. Furthermore, the diameter of cavity tube appended on side of the lamp tube is shorter than that of lamp tube.
    • Application Example 6
  • Referring to FIGS. 9 to 11, this Example is similar to Application Example 2, except that a SL-type lamp tube 10 is provided.
    • Application Example 7
  • Referring to FIGS 12 to 14, this Example is similar to Application Example 3, except that a 2π-type lamp tube 11 is provided.
    • Application Example 8
  • This Example is similar to Application Example 4, except that a H-type or Buddha's Hand-shape-type lamp tube is provided.
  • It is to be understood that the embodiments depicted in the patent specification herein are not intended to be, nor should it be deemed to be, limited thereby and such other modifications or embodiments without departing from the spirit and essential characteristics of such invention herein are particularly reserved especially as they fall within the breadth and scope of the claims here appended.

Claims (9)

  1. A fluorescent lamp comprising a lamp tube, a cathode, an stem cap and a wire, wherein one end of side wire connected to said cathode is fixed on said stem cap and the other end of said wire is led out from said lamp tube, and at least one cavity tube connecting through said lamp tube is disposed on the side of at least one said lamp tube.
  2. The fluorescent lamp of claim 1, wherein an stem cap and amalgam are disposed in at least one said cavity tube, and said amalgam is disposed inside said stem cap.
  3. The fluorescent lamp of claim 2, wherein said stem cap and amalgam are disposed at one end of said cavity tube.
  4. The fluorescent lamp of claim 1, wherein said cathode, stem cap and wire are disposed in at least one said cavity tube, and one end of said wire connected to said cathode is fixed on said stem cap and the other end of said wire is led out from said cavity tube.
  5. The fluorescent lamp of claim 4, wherein said stem cap is disposed at one end of said cavity tube.
  6. The fluorescent lamp of claim 1, wherein said cathode, stem cap, amalgam and wire are disposed in at least one said cavity tube, and one end of said wire connected to said cathode is fixed on said stem cap and the other end of said wire is led out from said cavity tube, and said amalgam is disposed inside said stem cap.
  7. The fluorescent lamp of claim 6, wherein said stem cap and amalgam are disposed at one end of said cavity tube.
  8. The fluorescent lamp of claim 1, wherein the diameter of said lamp tube is 6-25mm.
  9. The fluorescent lamp of claim 1, wherein said lamp tube is tubular, U-type, H-type, π-type, Buddha's Hand-shape-type, W-type or SL-type tube.
EP05106230A 2004-07-08 2005-07-07 Fluorescent lamp Withdrawn EP1615255A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200420073880 2004-07-08
CNB2004100783883A CN100423174C (en) 2004-07-08 2004-09-27 Fluorescent lamp

Publications (2)

Publication Number Publication Date
EP1615255A2 true EP1615255A2 (en) 2006-01-11
EP1615255A3 EP1615255A3 (en) 2006-07-12

Family

ID=34796413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05106230A Withdrawn EP1615255A3 (en) 2004-07-08 2005-07-07 Fluorescent lamp

Country Status (4)

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EP (1) EP1615255A3 (en)
JP (1) JP2006024571A (en)
KR (1) KR100749585B1 (en)
CN (1) CN100423174C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103021790A (en) * 2011-09-27 2013-04-03 周明久 Lighting light tube with fluorescent lamp filaments functioning as polar plates

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1133824B (en) * 1960-09-05 1962-07-26 Patra Patent Treuhand Mercury low pressure discharge lamp for increased electrical and / or thermal load, especially fluorescent lamp
EP1056119A2 (en) * 1999-05-26 2000-11-29 Mass Technology (H.K.) Ltd. Cold-end device of a low-pressure mercury vapour discharge lamp
WO2002056331A1 (en) * 2001-01-15 2002-07-18 Koninklijke Philips Electronics N.V. A fluorescent lamp and method for manufacturing the same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08250067A (en) * 1995-03-14 1996-09-27 Matsushita Electron Corp Bulb shape fluorescent lamp
JPH09147795A (en) * 1995-11-28 1997-06-06 Matsushita Electron Corp Compact self-ballasted fluorescent lamp
CN2364551Y (en) * 1999-02-12 2000-02-16 马勤 Cold cathode tube with cold end
JP3417349B2 (en) * 1999-07-14 2003-06-16 松下電器産業株式会社 Fluorescent lamp and bulb-type fluorescent lamp using the same
JP2003346712A (en) * 2002-05-29 2003-12-05 Hitachi Lighting Ltd Fluorescent lamp, and lighting device using the same
CN2599739Y (en) * 2002-09-21 2004-01-14 赖勇清 Energy-saving lamp tube with additional cold end tube
CN2604000Y (en) * 2003-03-11 2004-02-18 黄甜仔 Spiral fluorescent tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1133824B (en) * 1960-09-05 1962-07-26 Patra Patent Treuhand Mercury low pressure discharge lamp for increased electrical and / or thermal load, especially fluorescent lamp
EP1056119A2 (en) * 1999-05-26 2000-11-29 Mass Technology (H.K.) Ltd. Cold-end device of a low-pressure mercury vapour discharge lamp
WO2002056331A1 (en) * 2001-01-15 2002-07-18 Koninklijke Philips Electronics N.V. A fluorescent lamp and method for manufacturing the same

Also Published As

Publication number Publication date
CN1610053A (en) 2005-04-27
JP2006024571A (en) 2006-01-26
EP1615255A3 (en) 2006-07-12
KR20060050002A (en) 2006-05-19
CN100423174C (en) 2008-10-01
KR100749585B1 (en) 2007-08-14

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