CN1242871A - Low-pressure mercury discharge lamp - Google Patents

Low-pressure mercury discharge lamp Download PDF

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Publication number
CN1242871A
CN1242871A CN 98801543 CN98801543A CN1242871A CN 1242871 A CN1242871 A CN 1242871A CN 98801543 CN98801543 CN 98801543 CN 98801543 A CN98801543 A CN 98801543A CN 1242871 A CN1242871 A CN 1242871A
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CN
China
Prior art keywords
fluorescent material
discharge
nanometers
discharge lamp
wavelength
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Application number
CN 98801543
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Chinese (zh)
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CN1129952C (en
Inventor
E·W·J·L·奥门
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Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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Publication of CN1242871A publication Critical patent/CN1242871A/en
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Publication of CN1129952C publication Critical patent/CN1129952C/en
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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
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/48—Separate coatings of different luminous materials
    • 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
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

A low-pressure mercury discharge lamp of the invention comprises an envelope (1) that encloses a discharge space (2) in a gastight manner. The envelope is provided with a luminescent material (4) which is excitable with radiation of a wavelength of 254 nm. The envelope (1) is further provided with a further luminescent material (5) which has an excitation spectrum of which the value for a wavelength of 436 nm amounts to at least 10 % of that at a wavelenght of 254 nm, and which further luminescent material has an emission spectrum with a maximun in a wavelength range from 580 to 720 nm. The lamp of the invention has in a dimmed state of operation a color point of which the value of the x-coordinate is higher than in the nominal state of operation.

Description

Low-pressure mercury discharge lamp
The present invention relates to a kind of low-pressure mercury discharge lamp, it comprises the printing opacity seal bootr that has a hermetic type discharge space, this discharge space is filled with and comprises mercury and one or more rare gas at interior ionogenic filler, also comprise the device that is used for keeping discharge at this discharge space, described seal bootr has fluorescent material, can be the radiation excitation of 254 nanometers by wavelength.
A kind of like this low-pressure mercury discharge lamp can be known by EP 660 371 A1.The seal bootr that has discharge space of known lamps is a tubular discharge ware, and electrode is positioned at wherein two ends, to be used as the device of keeping discharge in discharge space.This discharge ware has a fluorescence coating on its inside surface, the fluorescent material that its fluorescent material comprises has: with trivalent ternium activated cerium-Mg aluminate, and with the barium-Mg aluminate of divalent europium activation, and the yittrium oxide that activates with the trivalent europium.Known discharge lamp can be used as the substitute of incandescent lamp, and its shortcoming is that when being in the half-light operating state, the x coordinate figure of its color point is compared low with normal operating conditions.Known discharge lamp is different with incandescent lamp in this respect; Really, incandescent lamp higher than its nominal operation state of the x coordinate figure of color point that be in the half-light operating state.
The purpose of this invention is to provide a kind of low-pressure mercury discharge lamp, and the x coordinate figure of the color point of its half-light operating state is high than normal operating conditions as type as described in first section of this paper.According to the present invention, being characterized as of the purpose that is used for by the low-pressure mercury discharge lamp of first section described type of this paper, its sealing is covered with the fluorescent material that adds, this material wavelength value be the excitation spectrum value of 436 nanometers reach at least its wavelength be 254 nanometers the excitation spectrum value 10%, the maximum of the described emission spectrum that fluorescent material had that adds is positioned at 580 nanometer to 720 nanometer wavelength range.
The inventor finds, when discharge lamp dims, the wavelength that in discharge space, is produced be the radiation intensity of 436 nanometers reduce do not resemble 254 nanometers radiation reduce so severely.In discharge lamp according to the present invention, the former is converted into the radiation that wave-length coverage is 580 nanometer to 720 nanometers at the radiation of wavelength.Thereby, the x coordinate figure of the color point of discharge lamp according to the present invention when the half-light operating state when being in normal operating conditions for high.
It should be noted that from US-P 5,592 fluorescent material of the seal bootr of 052 a kind of low-pressure mercury discharge lamp of being known can be the radiation excitation of 254 nanometers by wavelength, it adds fluorescent material can be the radiation excitation of 330 nanometer to 440 nanometers by wave-length coverage.With the purpose of two kinds of fluorescent material combinations is can adjust by working method for the colour temperature that makes discharge lamp.When known lamps is in the burst operating state but not during continuous duty, its colour temperature can raise.When this operating state changed, luminous flux can reduce.When adopting low-pressure mercury discharge lamp to replace incandescent lamp, be not wish to occur this phenomenon.On the contrary, the performance that incandescent lamp has is, when luminous flux was made as low numerical value, colour temperature can reduce.By US-P 5,592, among the embodiment of 052 discharge lamp of being known, adding fluorescent material is by fluorescent material YVO 4: Eu 3+Constitute.It is the radiation excitation of 436 nanometers that this fluorescent material can or not be difficult to by wavelength.
The combination that fluorescent material can comprise independent a kind of fluorescent material or some kinds of fluorescent materials that adds according to discharge lamp of the present invention.Be applicable to that adding the fluorescent materials material for example is CaS:Eu 2+, SrS:Eu 2+Or (Zn, Cd) S:Ag +, or organic fluorescence materials such as cinnamic acid europium.
In according to one of low-pressure mercury discharge lamp of the present invention attractive embodiment, the maximum of emission spectrum that adds fluorescent material is between 630 nanometer to 700 nanometers, thereby to color expression index R9 (peony) generation effect.The fluorescent material that is applicable to this for example is Mg 4GeO 5.5F:Mn 4+
When discharge lamp was dimmed, the degree that the x coordinate figure of color point raises can be subjected to adding the influence of the absorption 436 nm radiation degree of fluorescent material.In the embodiment of a reality, adding fluorescent material, to be absorbed in the wavelength that produces in the discharge space be that the radiation of 436 nanometers is 20-70%.To being lower than 20% numerical value, measurement effect is less relatively.Be higher than 70% numerical value and generally also can cause strong relatively absorption the radiation that produces by fluorescent material.Degree of absorption can easily be selected by those skilled in the art.For example, adding fluorescent material can be a kind of suspension.The weight of the higher percent that adds fluorescent material in the suspension can make coating heavier, and thereby can cause stronger absorption.Fluorescent material can be made up of independent a kind of fluorescent material with wide radiation wavelength scope, perhaps is made up of independent a kind of fluorescent material with some different radiation wavelength scopes.Other selection can be, fluorescent material can be made up of different fluorescent materials, and they have mutually different wave-length coverage.
For the radiation that wave-length coverage is 520 nanometer to 565 nanometers, fluorescent material can include, for instance, and one or more fluorescent materials Ce 0.67Tb 0.33MgAl 11O 19(CAT), Ce 0.3Gd 0.5Tb 0.2MgB 5O 10(CBT).Tb 3+Play the effect of activator at this.As higher relatively specified colour temperature of hope, be the radiation of 430 nanometer to 490 nanometers for wave-length coverage, fluorescent material to comprise again one or more fluorescent materials (Ba, Ca) 1.29Al 12O 19.29: Eu 2+(BAL), Sr 5(PO 4) 3Cl:Eu 2+(SCAP), BaMgAl 10O 17: Eu 2+(BAM) and Sr 2Al 6O 11: Eu 2+(SAL).The radiation of this wave-length coverage all can realize that particularly for the spectral line of 436 nanometers, discharge lamp has low relatively specified colour temperature by the direct radiation of mercury discharge.If wish to add fluorescent material, a kind of fluorescent material such as Y arranged to 580 nanometer to 720 nanometer wavelength range generation effects in the spectrum 2O 3: Eu 3+(YOX) can add fluorescent material, it has this wave-length coverage effect and adds.
In an embodiment according to discharge lamp of the present invention, seal bootr is a discharge ware that seals in the airtight vacuum mode, fluorescent material is arranged in the fluorescence coating simultaneously and add fluorescent material.An attractive embodiment is characterized as, and its fluorescent material and add fluorescent material and be in mutually different fluorescence coating contains the fluorescent materials layer and is arranged on discharge space and contains and add between the fluorescent materials layer.Its advantage is, the ultra-violet radiation that is produced in the discharge space reach contain add the fluorescent materials layer before, most ofly just be converted containing in the fluorescent materials layer.With the exception of this, fluorescent material is here also being protected and is being added fluorescent material and avoid bombardment from the ion and the electronics of discharge space.This makes the range of choice that adds fluorescent material relax.
In the modified model of above-mentioned attractive embodiment, a plurality of fluorescence coatings are positioned on the inside surface of discharge ware, feasiblely like this contain the fluorescent materials layer and add on the fluorescent materials layer attached to containing.Good follow-on being characterised in that according to the described attractive embodiment of discharge lamp of the present invention, its seal bootr not only comprises a discharge ware that seals in the airtight vacuum mode, but also comprise an outer lamp housing that surrounds the discharge ware, contain on the inside surface of fluorescent materials layer attached to the discharge ware, add the fluorescent materials layer attached on the outer lamp housing and contain.Contain and add the fluorescent materials layer simultaneously as containing the diffusion of light body that the fluorescent materials layer is produced.Outer lamp housing useable glass is made, and perhaps can select for use a kind of synthetic resin to make.In the embodiment that these seal bootrs are made up of several portions, for one of them (ware or outer lamp housing for example discharge) with these parts of the seal bootr of hermetic type sealing, this obviously is enough.
Self-evident, the character of keeping the device of discharge there is no substantive meaning for main idea of the present invention.Described device can be by for example placing the pair of electrodes that maybe can be not interposing in the discharge ware to be constituted.Another kind of scheme is, this device can be made of for example coil, and it can produce an alternating magnetic field in working order the time in discharge space.This coil preferably places outside the discharge space, thereby can save the conducting element that is placed through in the discharge ware.
With reference to accompanying drawing, give more detailed description to these and other aspects of the present invention, in the accompanying drawing:
Fig. 1 illustrates first embodiment of low-pressure mercury discharge lamp of the present invention,
Fig. 2 illustrates the emission spectrum that adds fluorescent material that discharge lamp adopted of Fig. 1,
Fig. 3 A illustrates this excitation spectrum that adds fluorescent material,
Fig. 3 B illustrates the excitation spectrum of another kind of fluorescent material,
Fig. 4 illustrates the difference (Δ x, Δ y) of the color point that half-light work compares with nominal operation,
Fig. 5 illustrates second embodiment of low-pressure mercury discharge lamp of the present invention.
First embodiment of low-pressure mercury discharge lamp shown in Figure 1 comprises the printing opacity seal bootr 1 that has a hermetic type discharge space 2, this discharge space is filled with and comprises mercury and one or more rare gas at interior ionogenic filler, also comprises the device 3 that is used for keeping at this discharge space discharge.It can be the fluorescent material 4 of the radiation excitation of 254 nanometers by wavelength that seal bootr 1 has a kind of.Fluorescent material 4 comprises fluorescent material Ce at this 0.67Tb 0.33MgAl 11O 19And Y 2O 3: Eu 3+, its weight ratio is 23: 77.Seal bootr 1 also has a kind of fluorescent material 5 that adds, this material wavelength value be the excitation spectrum value of 436 nanometers reach at least its wavelength be 254 nanometers the excitation spectrum value 10%, the maximum of this emission spectrum is positioned at 580 nanometer to 720 nanometer wavelength range.
The fluorescent material 5 that adds in this example comprises fluorescent material Mg 4GeO 5.5F:Mn 4+, the maximum of its emission spectrum promptly is approximately 660 nanometers between 630 nanometers and 700 nanometers.
The seal bootr 1 of present embodiment comprises several portions, that is, and and a discharge ware 10 and an outer lamp housing 11 that seals in the vacuum tightness mode.The discharge ware is made tubulose and hooking, and its internal diameter is 10 millimeters.Electrode 3a, 3b are positioned at each end of pipe, and electrode 3a, 3b form the device 3 of keeping discharge in discharge space 2.Outer lamp housing 11 surrounds discharge ware 10.
Low-pressure mercury discharge lamp shown here has constituted the part of a light source body, and this light source body also comprises power pack 6, and it is controlled by controller 7.Power pack 6 is installed in the overcoat 8, and is connected to contact point 9a, 9b on the crown top of burner 9 that invests overcoat 8.
Fluorescent material 4 and add fluorescent material 5 and lay respectively in mutually different fluorescence coating 40 and 50.The fluorescence coating 40 that contains fluorescent material 4 is at discharge space 2 and contain between the fluorescence coating 50 that adds fluorescent material 5.The fluorescence coating 40 that contains fluorescent material 4 attached to discharge ware 10 on interior surface 10 '.Containing the fluorescence coating 50 that adds fluorescent material 5 is on interior surface 11 ' attached to outer lamp housing 11 equally.
Fig. 2 illustrates Mg 4GeO 5.5F:Mn 4+Emission spectrum.Emission light has maximum in wavelength 660 nanometers.This excitation spectrum that is used to add the fluorescent materials material as shown in Figure 3A.Clearly, add fluorescent material and reach it at 48% of the numerical value of 254 nanometers at the numerical value of the excitation spectrum of wavelength 436 nanometers.As a comparison, Fig. 3 B illustrates YVO 4: Eu 3+Excitation spectrum, therefrom as seen, this fluorescent material is compared with its excitation spectrum in wavelength 254 nanometers at the excitation spectrum of wavelength 436 nanometers, and is little of ignoring.
Produce two embodiment of the invention as shown in Figure 1 discharge lamp (inv1, inv2) and one be not according to discharge lamp of the present invention (ref).In discharge lamp inv1 and inv2, contain add fluorescent material 5 fluorescence coating 50 separately absorbing wavelength be 436 nanometers radiation 39% and 61%.In these two lamps, absorption is between aforesaid 20% and 70% boundary.To contain fluorescent material Mg 4GeO 5.5F:Mn 4+Suspension (wherein with butyl acetate as suspending agent, with nitrocellulose as adhesive) be layered on the inner surface of outer lamp housing and make it dry, just can obtain containing the fluorescence coating 50 that adds fluorescent material 5, pine for adding, adhesive can vapor away from fluorescence coating 50.In discharge lamp inv1 and inv2, the weight of the described fluorescent material in the suspension is respectively 1.39g/cm 3And 1.48g/cm 3Discharge lamp ref does not have outer lamp housing.
Discharge lamp ref, inv1 and inv2 continuous operation are at rated condition and half-light state.At the nominal operation state, the power P of discharge lamp consumption is 8.5 watts, is 3.4 watts at the half-light state.Discharge lamp be approximately at the luminous flux numerical value of half-light state its nominal operation state luminous flux numerical value 15%.Following table is listed colour temperature T cWith the x of the color point of described discharge lamp under two kinds of operating states, y coordinate.
Power (watt) ????ref ????inv1 ????inv2
??T c(K) ??x ?y ??T c(K) ??x ?y ??T c(K) ??x ?y
????8.5 ??2778 ?457 ?416 ??2710 ?473 ?436 ??2653 ?485 ?448
????3.4 ??2699 ?454 ?400 ??2579 ?475 ?421 ??2537 ?489 ?438
Fig. 4 is illustrated in change (Δ x, Δ y) from nominal operation state color point to the transition process of half-light operating state with arrow.By Fig. 4 obviously as seen, for discharge lamp inv1 of the present invention and inv2, the x coordinate figure of the color point of its half-light operating state is higher than the x coordinate figure of the color point of its nominal operation state.For not being according to discharge lamp ref of the present invention, the x coordinate figure of the color point of its half-light operating state is lower than the x coordinate figure of the color point of its nominal operation state.
Fig. 5 illustrates second embodiment of discharge lamp of the present invention.The label with Fig. 1 corresponding elements herein exceeds 100.In the present embodiment, part 112 and outer part 113 in seal bootr 101 comprises.Interior part 112 is one to curve the pipe of U-shaped, and it has the first blind end 112a, wherein is equipped with the first electrode 103a and the second open end 112b.Part 112 in outer part 113 is being sealed with air tight manner.The second electrode 103b places outer part, facing to open end 112b.There is fluorescent material 104 on the inside surface 112 ' of the interior part 112 of seal bootr 101, wherein contains fluorescent material BaMgAl 11O 17: Eu 2+, Ce 0.67Tb 0.33MgAl 11O 19And Y 2O 3: Eu 3+The inside surface 113 ' of the outer part 113 of seal bootr 101 adds fluorescent material 104, wherein contains fluorescent material CaS:Eu 2+

Claims (5)

1. a low-pressure mercury discharge lamp comprises having a hermetic type discharge space (2; 102) printing opacity seal bootr (1; 101), this discharge space is filled with and comprises mercury and one or more rare gas at interior ionogenic filler, also comprises the device (3a, the 3b that are used for keeping at this discharge space discharge; 103a, 103b), described seal bootr (1; 101) having a kind of can be the fluorescent material (4 of the radiation excitation of 254 nanometers by wavelength; 104), it is characterized in that described seal bootr (1; 101) also have a kind of fluorescent material (5 that adds; 105), this material wavelength value be the excitation spectrum value of 436 nanometers reach at least its wavelength be 254 nanometers the excitation spectrum value 10%, the described maximum that adds the emission spectrum of fluorescent material is positioned at 580 nanometer to 720 nanometer wavelength range.
2. according to the low-pressure mercury discharge lamp of claim 1, it is characterized in that the maximum of the described emission spectrum that adds fluorescent material (5) is between 630 nanometers and 700 nanometers.
3. according to the low-pressure mercury discharge lamp of claim 1 or 2, it is characterized in that, describedly add fluorescent material (5) to be absorbed in the tool wavelength that produces in the discharge space be 20% to 70% of 436 nm radiations.
4. according to claim 1,2 or 3 low-pressure mercury discharge lamp, it is characterized in that, described fluorescent material (4) and add fluorescent material (5) and be positioned at mutually different fluorescence coating (respectively being 40 and 50), the fluorescence coating (40) that contains fluorescent material (4) is arranged on discharge space (2) and contains between the fluorescence coating (50) that adds fluorescent material (5).
5. according to the low-pressure mercury discharge lamp of claim 4, it is characterized in that, described seal bootr (1) comprises the discharge ware (10) and the outer lamp housing (11) that surrounds the discharge ware that are sealed in the airtight vacuum mode, contain on the inside surface of fluorescence coating (40) attached to described discharge ware (10) of fluorescent material (4), and contain add fluorescent material (5) fluorescence coating (50) attached on the outer lamp housing (11).
CN 98801543 1997-10-20 1998-10-08 Low-pressure mercury discharge lamp Expired - Fee Related CN1129952C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP97203266 1997-10-20
EP97203266.8 1997-10-20

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CN1242871A true CN1242871A (en) 2000-01-26
CN1129952C CN1129952C (en) 2003-12-03

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CN 98801543 Expired - Fee Related CN1129952C (en) 1997-10-20 1998-10-08 Low-pressure mercury discharge lamp

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EP (1) EP0968520B1 (en)
JP (1) JP2001506403A (en)
CN (1) CN1129952C (en)
DE (1) DE69820996T2 (en)
WO (1) WO1999021214A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8497621B2 (en) 2007-09-24 2013-07-30 Osram Gesellschaft Mit Beschraenkter Haftung Illuminating device with light buffer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6404123B1 (en) * 1998-08-21 2002-06-11 Corning Incorporated Channeled glass article for compact fluorescent lighting
DE10001188A1 (en) * 2000-01-14 2001-07-19 Philips Corp Intellectual Pty Liquid crystal color screen with phosphor layer
EP1514296A1 (en) * 2002-06-06 2005-03-16 Koninklijke Philips Electronics N.V. Low-pressure mercury vapor discharge lamp
WO2007080541A1 (en) * 2006-01-16 2007-07-19 Philips Intellectual Property & Standards Gmbh Light emitting device with a eu-comprising phosphor material
KR20100134779A (en) * 2008-04-23 2010-12-23 코닌클리즈케 필립스 일렉트로닉스 엔.브이. A luminous device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5105122A (en) * 1989-08-18 1992-04-14 U.S. Philips Corporation Electrodeless low-pressure mercury vapor discharge lamp
JPH05217556A (en) * 1992-02-07 1993-08-27 Matsushita Electric Ind Co Ltd Fluorescent lamp
WO1998008916A1 (en) * 1996-08-30 1998-03-05 Philips Electronics N.V. Low-pressure mercury discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8497621B2 (en) 2007-09-24 2013-07-30 Osram Gesellschaft Mit Beschraenkter Haftung Illuminating device with light buffer

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Publication number Publication date
EP0968520B1 (en) 2004-01-07
JP2001506403A (en) 2001-05-15
DE69820996D1 (en) 2004-02-12
EP0968520A1 (en) 2000-01-05
DE69820996T2 (en) 2004-12-09
WO1999021214A1 (en) 1999-04-29
CN1129952C (en) 2003-12-03

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