EP2062285A2 - Discharge lamp comprising a discharge vessel and an electrode frame - Google Patents
Discharge lamp comprising a discharge vessel and an electrode frameInfo
- Publication number
- EP2062285A2 EP2062285A2 EP07847113A EP07847113A EP2062285A2 EP 2062285 A2 EP2062285 A2 EP 2062285A2 EP 07847113 A EP07847113 A EP 07847113A EP 07847113 A EP07847113 A EP 07847113A EP 2062285 A2 EP2062285 A2 EP 2062285A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- discharge lamp
- discharge
- end region
- glass bead
- 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- Withdrawn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
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
Definitions
- the invention relates to a discharge lamp with a discharge vessel and an electrode frame with a lamp filament, which electrode frame extends at least partially into the discharge vessel and electrode holders are connected to a glass bead.
- a low-pressure discharge lamp in which an electrode frame extends through an end region of a discharge vessel into the discharge space. Electrode holders of the electrode frame are sealed gas-tight at an end region of the discharge vessel and a glass bead, which is located within the discharge vessel, is arranged between the electrode holders.
- a similarly constructed low-pressure discharge lamp 1 is shown in Fig. 1, which has a discharge vessel 2, in which an electrode frame 3 extends in regions. In the end region 21, in which the discharge vessel 2 is squeezed, electrode holders 31 and 32 of the electrode frame 3 are sealed in a gastight manner. At a front end of the electrode frame 3, a lamp filament 33 is arranged as an electrode. Set back to this lamp filament 33, a glass bead 34 is mounted within the discharge vessel 2, which is between the two electrode holders 31st and 32 extends. In addition, a material region 35 made of TiH 2 is formed on the side of this glass bead 34 facing the end region 21.
- a discharge lamp according to the invention comprises a discharge vessel and an electrode frame on which a lamp filament is arranged as an electrode.
- the electrode frame extends in regions into the discharge vessel and electrode holders of this electrode frame are connected to a glass bead.
- the glass bead serves to increase the stability of the electrode frame.
- the tightness at this end region can also be increased, since the tightness between glass-glass transitions is better than between glass and electrode holders.
- the glass bead is completely sealed in the end region.
- the tightness in the end region can be further improved.
- the electrode frame Due to the at least partially melting of the glass bead in the end region, the electrode frame can also protrude into the discharge space of the discharge vessel with a shortened length compared to the prior art. As a result, the discharge space of the discharge lamella can be increased and / or the overall length of the lamp can be reduced.
- the glass material of the end region is preferably different from the glass material of the glass bead. In the end area then two different glass materials are melted.
- the thermal expansion coefficients of the two glass materials are different, such that, when temperature gradients occur in the region of the two glass materials, mechanical stresses occur. leading to a crack in the crimped area or in an end region of the discharge vessel.
- Such glass pairing in a lamp area where high temperature gradients may occur provides a backup that prevents further destruction of components of the system.
- the glass material of the end region is equal to the glass material of the glass bead.
- the tightness in the meltdown can be made particularly favorable.
- soft glass is used here as the glass material.
- the height of the end portion is less than twice the maximum height of the glass bead.
- the discharge lamp can be formed by this configuration.
- the invention also makes it easier to process the glass material of the glass bead.
- cost advantages through the use of cheaper material, especially cheaper glass material can be achieved.
- Figure 1 is a schematic representation of a portion of a known from the prior art discharge lamp.
- Fig. 2 is a schematic representation of a portion of a discharge lamp according to the invention.
- a discharge lamp 1 designed as a low-pressure discharge lamp comprises a tubular discharge vessel 2 with a lower end region 21, which is formed squashed.
- An electrode frame 3 extends partially into the discharge vessel 2 and comprises two wire-shaped electrode holders 31 and 32.
- a lamp coil 33 is arranged on a front end of these two electrode holders 31 and 32 arranged in the discharge vessel 2 as an electrode.
- a glass bead 34 extends between the two electrode holders 31 and 32 and, in the exemplary embodiment, is completely squeezed into the end region 21.
- the glass material of the end region 21 differs in the embodiment of the glass material of the glass bead 34.
- the two glass materials are formed so that their thermal expansion coefficients are so different are that when temperature gradients occur in a temperature range with, for example, local temperatures between 250 0 C and 500 0 C, the different expansion leads to a crack in the end region 21.
- the melting of the electrode holders 31 and 32 into the glass bead 34 is vacuum-tight.
- the height d3 of the crimped end region 21 can also be reduced in comparison to the height d4 of the end region 21 in the prior art according to FIG.
- the height h3 is 1.5 times the approximately centrally formed maximum height of the cross-sectionally oval glass bead 34.
- the electrode frame 3 extends less far into the discharge vessel 2 by a height d2 than is required by the electrode frame 3 in the known discharge lamp according to FIG.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006052952A DE102006052952A1 (en) | 2006-11-09 | 2006-11-09 | Discharge lamp with a discharge vessel and an electrode frame |
PCT/EP2007/061918 WO2008055891A2 (en) | 2006-11-09 | 2007-11-06 | Discharge lamp comprising a discharge vessel and an electrode frame |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2062285A2 true EP2062285A2 (en) | 2009-05-27 |
Family
ID=39107194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07847113A Withdrawn EP2062285A2 (en) | 2006-11-09 | 2007-11-06 | Discharge lamp comprising a discharge vessel and an electrode frame |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090302761A1 (en) |
EP (1) | EP2062285A2 (en) |
JP (1) | JP2010509721A (en) |
CN (1) | CN101536143B (en) |
DE (1) | DE102006052952A1 (en) |
WO (1) | WO2008055891A2 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2068596A (en) * | 1934-12-20 | 1937-01-19 | Hygrade Sylvania Corp | Vapor discharge device |
US4136298A (en) * | 1977-08-15 | 1979-01-23 | General Electric Company | Electrode-inlead for miniature discharge lamps |
US4202999A (en) * | 1978-04-11 | 1980-05-13 | General Electric Company | Fused silica lamp envelope and seal |
NL8302128A (en) * | 1983-06-15 | 1985-01-02 | Philips Nv | LOW PRESSURE SODIUM VAPOR DISCHARGE LAMP. |
US4970425A (en) * | 1989-04-24 | 1990-11-13 | Gte Products Corporation | Thermal device, mount, and manufacturing method |
US6166491A (en) * | 1998-06-04 | 2000-12-26 | Toshiba Lighting & Technology Corporation | Lighting device and display equipment |
JP4276005B2 (en) * | 2003-06-30 | 2009-06-10 | 株式会社 日立ディスプレイズ | Cold cathode fluorescent tube and liquid crystal display device using the cold cathode fluorescent tube |
DE102004004655A1 (en) * | 2004-01-29 | 2005-08-18 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Low-pressure discharge lamp |
-
2006
- 2006-11-09 DE DE102006052952A patent/DE102006052952A1/en not_active Withdrawn
-
2007
- 2007-11-06 CN CN2007800415065A patent/CN101536143B/en not_active Expired - Fee Related
- 2007-11-06 JP JP2009535709A patent/JP2010509721A/en not_active Withdrawn
- 2007-11-06 US US12/312,316 patent/US20090302761A1/en not_active Abandoned
- 2007-11-06 WO PCT/EP2007/061918 patent/WO2008055891A2/en active Application Filing
- 2007-11-06 EP EP07847113A patent/EP2062285A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2008055891A2 * |
Also Published As
Publication number | Publication date |
---|---|
JP2010509721A (en) | 2010-03-25 |
DE102006052952A1 (en) | 2008-05-15 |
WO2008055891A2 (en) | 2008-05-15 |
US20090302761A1 (en) | 2009-12-10 |
CN101536143A (en) | 2009-09-16 |
WO2008055891A3 (en) | 2008-07-03 |
CN101536143B (en) | 2011-02-09 |
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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: 20090331 |
|
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 |
|
RBV | Designated contracting states (corrected) |
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 |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB HU IT |
|
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: 20120601 |