EP2044615A2 - Entladungslampe, insbesondere niederdruckentladungslampe - Google Patents
Entladungslampe, insbesondere niederdruckentladungslampeInfo
- Publication number
- EP2044615A2 EP2044615A2 EP07787155A EP07787155A EP2044615A2 EP 2044615 A2 EP2044615 A2 EP 2044615A2 EP 07787155 A EP07787155 A EP 07787155A EP 07787155 A EP07787155 A EP 07787155A EP 2044615 A2 EP2044615 A2 EP 2044615A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- discharge lamp
- discharge
- discharge vessel
- lamp according
- 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- Withdrawn
Links
Classifications
-
- 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
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
Definitions
- Discharge lamp in particular low-pressure discharge lamp
- the invention relates to a discharge lamp, in particular a low-pressure discharge lamp, comprising a discharge vessel and two electrodes disposed at least partially in the discharge vessel and a first coating of a first material arranged at least partially on an outer side of the discharge vessel.
- FIG. 1 A known from the prior art low-pressure discharge lamp is shown schematically in Fig. 1.
- This low-pressure discharge lamp embodied as a fluorescent lamp 1 comprises a tubular discharge vessel 2 at whose opposite end regions 21 and 22 an electrode 3 or 4 is respectively arranged on sockets 5 and 6. To the outside each contact pins 7a, 7b and 8a and 8b extend.
- a coating 9 is applied, which extends substantially over the length of the fluorescent lamp 1.
- This coating 9 is formed as a plastic coating.
- the plastic layer has over the entire length (y-direction) a substantially constant thickness and a constant outer diameter.
- a discharge lamp according to the invention is designed in particular as a low-pressure discharge lamp.
- the discharge lamp comprises a discharge vessel and a first and a second electrode, which are arranged at least partially in the discharge vessel.
- a first coating is at least partially arranged, which is formed of a first material.
- a second coating of a second material is arranged on the outside of the discharge vessel.
- an outer coating can be achieved, which allow sufficient functionality even for relatively high-loaded discharge lamps.
- this outer coating can be colored or pigmented as desired.
- a second coating is formed in the region of the first electrode and in the region of the second electrode on the outside of the discharge vessel.
- both electrodes are relatively hot during operation, and as a result of which the region of the discharge vessel adjacent to the electrodes is exposed to an increased temperature load and also to increased UV emission this dual-sided regional arrangement of the second coating provides a multilayer arrangement sufficient for the underlying functionality.
- the second coating provided only in critical areas, in addition to achieving the optimum functionality of the layer arrangement, a relatively cost-effective implementation and a material-saving design can be made possible.
- the second coating is preferably arranged directly on the outside of the discharge vessel and the first coating is formed on the second coating. It may be provided that the first coating, the second coating at least partially or completely covered. In a complete overlap, the second coating is thus contacted only with the outside of the discharge vessel on the one hand and with the first coating on the other hand. The second coating is completely enclosed in such an embodiment by these two components, the first coating and the outside of the discharge vessel. In addition to an at least partial contact, in particular a full-surface contact, the first with the second coating, the second coating may also be arranged so that it is at least partially directly on the outside of the discharge vessel. However, here as well, it can be provided that the second coating, with its side facing the discharge vessel, rests completely on this outside of the discharge vessel. Depending on the configuration of the discharge vessel and / or the configuration of the second coating, an optimal arrangement can thus be achieved in a flexible manner as required and with regard to the desired functionality.
- the first coating is preferably arranged outside the second coating directly on the outside of the discharge vessel. Again, an at least partially immediate attachment of the first coating can be provided.
- At least two second coatings are provided, these are each formed as separate coatings and positioned separately from each other.
- the first coating can also be provided as a separating element between the two second coatings.
- the first coating and the second coating are arranged such that in areas in which both coatings are arranged one above the other, the resulting layer system is made thicker than in areas in which only one coating is present.
- a thicker layer arrangement can then be formed on the outside of the discharge vessel than in regions of the outside of the discharge vessel which are remote therefrom. Both the temperature resistance and the UV resistance can thus be optimally achieved, as required, in virtually all areas on the outside of the discharge vessel.
- the materials of the two coatings are different.
- a plastic coating is preferably provided.
- materials such as VPE (crosslinked polyethylene), PET (polyethylene terephthalate), PC (polycarbonate) may be provided here.
- VPE crosslinked polyethylene
- PET polyethylene terephthalate
- PC polycarbonate
- the explicit list of plastics is merely exemplary and may include other plastics.
- plastic materials include HDPE (high-density polyethylene), POCAN, silicones, FEP (perfluoro (ethylene-propylene) plastic), PTFE (polytetrafluoroethylene) or PC (polycarbonate). Even these explicit plastic materials are not to be considered exhaustive in their list and are merely exemplary.
- the first coating and the second coating may also be formed of a same material.
- the functionality with regard to a Sufficient thermal and also sufficient UV resistance can then be achieved, for example, via a thickness variation in explicit regions on the outside of the discharge vessel.
- the first coating extends over the entire outside of the discharge vessel.
- the materials of the first coating are preferably designed such that they can also be used functionally with regard to splinter protection and / or as spectral filters. It can be provided that the second coating is formed from a material which allows at least a sufficient function as a spectral filter. In particular, the materials can be designed such that, with regard to the spectral filter function, they also enable the generation of saturated light colors, for example red, green, blue, yellow, of the discharge lamp. The function of a sufficient UV protection is advantageously fulfilled by the coatings.
- discharge lamps can be provided which can be used in a wide variety of applications.
- discharge lamps can be used as light sources in the effect lighting with, for example, color-adaptive lighting systems.
- Discharge lamps with anti-shattering function and UV protection are important for food-producing and related companies producing, for example, packaging for these foods.
- discharge lamps which have suitable spectral filter functions can also be used in lithography technology in chip production.
- the materials of the two coatings are designed such that the material of the second coating has a higher temperature stability. than the material of the first coating.
- a temperature resistance or a thermal resistance of a material it is understood, inter alia, that the materials essentially retain their elastic properties under a relatively high temperature influence and that the materials do not depolume, do not oxidize and also do not become brittle.
- the second coating preferably has a thickness or an extent from the surface of the discharge vessel to its surface facing away from the discharge vessel of less than 10 mm, in particular less than 6 mm and preferably in particular a thickness of between 0.5 mm and 5 mm.
- the thickness of the second coating may vary as well as the thickness of the first coating.
- the second coating is formed as a layer system and in turn comprises at least two coatings.
- the first coating on its side remote from the outside of the discharge vessel may also be covered at least in regions with a further third layer.
- the first coating and optionally the second coating may also be formed as a multi-layer system.
- the discharge vessel is tubular and the two electrodes are arranged at opposite ends of the discharge vessel.
- the electrodes may be formed substantially equal in size and shape. However, it can also be provided that the electrodes have different size and shape.
- both the first coating and the second coating in a tubular configuration of the discharge vessel in the radial direction are formed completely circumferentially. As a result, in particular a fluorescent lamp can be provided with an optimum coating system.
- Fig. 1 is a sectional view of a known from the prior art fluorescent lamp.
- Fig. 2 is a schematic sectional view of an inventive
- FIG. 2 shows, in a schematic manner, a sectional view through a low-pressure discharge lamp embodied as a fluorescent lamp 1 '.
- the fluorescent lamp 1 ' comprises a tubular discharge vessel 2, which may be, for example, a glass bulb.
- a tubular discharge vessel 2 which may be, for example, a glass bulb.
- At opposite end portions 21 and 22 of the discharge vessel 2 each have an electrode 3 and 4 are arranged and fixed to an associated base 5 and 6. From the sockets 5 and 6 each extend two electrical contact pins 7a and 7b and 8a and 8b to the outside.
- a second coating 10a is formed in the area 24 of the first electrode 3.
- the second coating 10a is completely circumferential in the radial direction of the discharge vessel 2 and thus arranged on the outside 23 in a ring-like manner.
- the second coating 10a With its side facing the outside 23, lies directly on its entire surface on this outside 23.
- this second coating 10a has a hill-shaped structure.
- this second coating 10a extends in the longitudinal direction (y-direction) substantially from the discharge vessel 2 side facing the base 5 to about twice the distance Electrode socket on the outside 23.
- this longitudinal extent of the second direction 10a is merely exemplary and may also be otherwise formed. It can be provided that the second coating 10a extends further in the longitudinal direction in the direction of the center of the discharge vessel 2 or else has a shorter design. Due to the cross-section of the hill-shaped configuration of the second coating 10a, this has a variable thickness (z-direction) over its longitudinal extent (y-direction).
- the second coating 10a may also be formed, for example, to the outer end of the base 5.
- a further second coating 10b is likewise formed in a region 25.
- a second separate coating 10a or 10b is thus respectively provided in the regions 24 and 25 and thus in both regions of the electrodes 3 and 4 on the outside 23 of the discharge vessel 2.
- Both second coatings 10a and 10b are arranged separately from each other and formed without contact with each other.
- the arrangement and shaping as well as the material configuration of the further second coating 10b is designed analogously to the opposing second coating 10a.
- the second electrode 4 is formed in the embodiment the same as the first electrode 3 and secured by a base 6 at the end portion 22 of the discharge vessel 2.
- the two second coatings 10a and 10b have an extension of about 20 mm in the longitudinal direction and thus in the y-direction. Again, this value is merely exemplary and may be greater or less.
- a first coating 9 is arranged so as to completely cover both second coatings 10a and 10b at their free surfaces. As can be seen, the first coating 9 extends over the entire length of the discharge vessel 2 and the adjoining thereto. It can also be provided that this first coating 9 extends only over the entire length of the discharge vessel 2. However, it can also be provided that starting from the illustration in FIG. 2, the first coating 9 also extends as far as back walls 51 and 61 of the base 5 and 6 and is formed there directly adjacent.
- the first coating 9 is arranged in the middle of the discharge vessel 2 and thus between the second coatings 10a and 10b directly on the outside 23 of the discharge vessel 2.
- the first coating 9 is also arranged completely circumferentially in the radial direction of the discharge vessel 2.
- the first coating 9 has a substantially constant layer thickness (z-direction) over its entire longitudinal extent.
- the arrangement of the first coating 9 and the second coatings 10a and 10b shown in the exemplary embodiment provides local layer systems which are formed with different thicknesses.
- the mode of operation of the discharge lamp 1 'can thereby be optimized.
- the first coating 9 has no direct contact with the outside 23, but is mounted at a certain distance to this outside 23 ,
- the second coatings 10a and 10b act as spacers in this context.
- the materials of the second coatings 10 a and 10 b are selected to have a higher thermal resistance than the material of the first coating 9. Moreover, the second coatings 10 a and 10 b are formed in their central central area with a greater thickness than the thickness of the first coating 9.
- the first coating 9 is formed as a plastic coating.
- the second coatings 10a and 10b may be formed of an aforementioned material in view of the functions desired by the fluorescent lamp 1 '. In combination of the materials for the coatings 9, 10a and 10b as well as their shape and arrangement can be optimized with respect to the requirements of the discharge lamp or the fluorescent lamp 1 '.
- the second coatings 10a and 10b may also be formed of several partial layers. Likewise it can be provided that at least one layer of air is also formed in the second coatings 10a and 10b. An air layer may also be formed between the first coating 9 and a second coating 10a or 10b.
- At least a further third layer is attached on the side facing away from the outer side 23 of the discharge vessel 2 of the first coating 9, at least in some areas.
- a third layer may be applied to the first coating 9 in the region between the second coatings 10a and 10b.
- this first coating 9 is made so thick in this region between the second coatings 10a and 10b that the outer surface of the first coating 9 is flat over the entire length.
- Both the first material of the first coating 9 and the second materials of the second coatings 10a and 10b are such that the respective coatings can be used as splinter protection and / or as a spectral filter are.
- the selected materials also ensure sufficient thermal and also sufficient UV resistance for a fluorescent lamp 1 'with a discharge current> 300 mA.
- the second coatings 10a and 10b are thus arranged on both sides in the region of the end regions 21 and 22 of the discharge vessel 2.
- a discharge lamp 1 ' according to the invention is the fact that its manufacture and production can be relatively easily made possible.
- a first coating can be applied, for example, in the form of a heat-shrinkable tube or by means of extrusion in one operation.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006033675A DE102006033675A1 (de) | 2006-07-20 | 2006-07-20 | Entladungslampe, insbesondere Niederdruckentladungslampe |
| PCT/EP2007/056872 WO2008009572A2 (de) | 2006-07-20 | 2007-07-06 | Entladungslampe, insbesondere niederdruckentladungslampe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2044615A2 true EP2044615A2 (de) | 2009-04-08 |
Family
ID=38828621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07787155A Withdrawn EP2044615A2 (de) | 2006-07-20 | 2007-07-06 | Entladungslampe, insbesondere niederdruckentladungslampe |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2044615A2 (de) |
| KR (1) | KR20090031695A (de) |
| DE (1) | DE102006033675A1 (de) |
| WO (1) | WO2008009572A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011002634A1 (de) * | 2011-01-13 | 2012-07-19 | Osram Ag | Entladungslampe mit Entladungsgefäß und Quecksilberfüllung |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4099090A (en) * | 1977-06-14 | 1978-07-04 | Westinghouse Electric Corp. | Fluorescent lamp having a longitudinal stripe of phosphor on outer envelope surface with reflector layer thereover |
| GB8918114D0 (en) * | 1989-08-08 | 1989-09-20 | Emi Plc Thorn | Light sources |
| CA2110005A1 (en) * | 1992-12-28 | 1994-06-29 | Jon B. Jansma | Fluorescent lamp having high resistance conductive coating and method of making same |
| EP0757376B1 (de) * | 1995-07-31 | 2001-08-16 | Matsushita Electronics Corporation | Leuchtstofflampe und Verfahren zu deren Herstellung |
| JPH10233190A (ja) * | 1997-02-20 | 1998-09-02 | Matsushita Electric Ind Co Ltd | ランプ |
-
2006
- 2006-07-20 DE DE102006033675A patent/DE102006033675A1/de not_active Withdrawn
-
2007
- 2007-07-06 WO PCT/EP2007/056872 patent/WO2008009572A2/de not_active Ceased
- 2007-07-06 EP EP07787155A patent/EP2044615A2/de not_active Withdrawn
- 2007-07-06 KR KR1020087031969A patent/KR20090031695A/ko not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008009572A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008009572A3 (de) | 2008-09-04 |
| WO2008009572A2 (de) | 2008-01-24 |
| DE102006033675A1 (de) | 2008-01-24 |
| KR20090031695A (ko) | 2009-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20081203 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB HU IT |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM AG |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20160202 |