EP1309984A1 - Beleuchtungseinheit mit mindestens einer, im wesentlichen u-förmigen gasentladungslampe - Google Patents
Beleuchtungseinheit mit mindestens einer, im wesentlichen u-förmigen gasentladungslampeInfo
- Publication number
- EP1309984A1 EP1309984A1 EP01962641A EP01962641A EP1309984A1 EP 1309984 A1 EP1309984 A1 EP 1309984A1 EP 01962641 A EP01962641 A EP 01962641A EP 01962641 A EP01962641 A EP 01962641A EP 1309984 A1 EP1309984 A1 EP 1309984A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas discharge
- discharge lamp
- lamp
- lighting unit
- ppp
- 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- Withdrawn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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/56—One or more circuit elements structurally associated with the lamp
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
- H01J61/523—Heating or cooling particular parts of the lamp
-
- 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
- CD 1_4 CD P- o CD ⁇ CD ⁇ ⁇ P SD P o Hi S C ⁇ ⁇ P • P- Hi ⁇ tr ⁇ rf CD P CD PP Jy ⁇ P ⁇ tr Q. ⁇ P iQ P- ⁇ PP P- P- tr
- P 1 SD P- 3 ⁇ SD P- CD P 1 ⁇ P- O ⁇ P 1 P P- SD ⁇ PP ⁇ P- SU SD C: o P- P 1 P cn P "rt tr SD P- 3 PP C ⁇ rr P ⁇ P- ⁇ PP ⁇ ⁇ P vq 3 vq Hi PP ⁇ 3 3 pr TJ rt ⁇ cn
- P P- P cn P 1 P - 1 CD SD S rt P pr P- H cn SD cn ⁇ P SD pr m P P- cn ⁇ 1 ⁇ P SD ⁇ ⁇ S ⁇ P ⁇ P cn SD P- tr rt ⁇ cn P- P- cn P o P ö ⁇ C ⁇ P- 1
- P SD tr 3 tr P- tr PPP, PPP rt PP P- P cn tr cn ⁇ s: P ⁇ P p- ⁇ ⁇ sQ ⁇ P- o-- ⁇ ⁇ rt sQ CJ- TJ P ⁇ PN SD ⁇ rt P rt tr rt P- vP P rt PP cn 3 ⁇ C ⁇ PP H- 1 P- TJ C ⁇ ⁇ ⁇ ⁇ ⁇ ? - cn cn P- P- P ⁇ cn ⁇ ⁇ P. C ⁇ ⁇ ⁇ QN
- PPP ⁇ POP p ⁇ P- tr P ⁇ tr P C ⁇ ⁇ Q. t P- (D tr tr rt cn tr P (D ⁇ SD P ⁇ vq P- tr TJ vq cn P s ⁇ . P- tr P ⁇ rt rt pr P- OP P. rt SD rt PPP l_l. s:
- the heat development in the central region of the lamp is significantly reduced.
- the electrical or thermal mass consists of a metallic light box, in which the at least one gas discharge lamp is arranged in such a way that the gas discharge lamp protrudes with its electrodes on one side of the light box and with it middle area on the opposite side of the light box on this.
- the latter preferably has an output transformer with windings on the circuit and lamp side, the output connections being formed at the ends of the winding on the lamp side.
- FIG. 1 shows a simplified circuit example of a conventional lighting unit with a U-shaped gas discharge lamp and a high-frequency driver circuit
- FIG. 2 shows an example of the course of the lamp current in the known lighting unit according to FIG. 1,
- FIG. 3 shows a simplified circuit example of the lighting unit according to the invention with a U-shaped one
- Figure 5 shows an embodiment of the lighting unit according to the invention with gas discharge lamps and arranged in a light box
- Figure 6 shows a partial cross section through the lighting unit shown in Figure 5.
- FIG. 1 shows a U-shaped gas discharge lamp 1, which contains not only a noble gas filling but also a small amount of mercury, which electrodes 2 and 3 are connected to the output connections 4 and 5 of a high-frequency driver circuit 6.
- the high-frequency driver circuit 6 contains driver electronics 7 and an output transformer 8 with a winding 9 on the circuit side and a winding 10 on the lamp side, which ends are connected to the output connections 4 and 5.
- the output terminal 5 is connected to an electrical ground M. Due to the high-frequency control of the gas discharge lamp 1, stray capacitances are effective between it and the electrical mass M, which lead to stray losses.
- the stray capacitances are shown here in simplified form as individual capacitances C s , but actually form a continuous capacitance covering the length of the gas discharge lamp 1.
- the impedance of the gas discharge path within the gas discharge lamp 1 is also shown here in simplified form in the form of individual impedances R between the stray capacitances C s . From the lamp current I flowing into the gas discharge lamp 1 at the far-end output connection 4, stray currents I s flow continuously via the stray capacitances C s in the direction of the electrical ground M, so that only one sum is left at the output connection 5 connected to the electrical ground M. All stray currents I s reduced lamp current I emerges from the gas discharge lamp 1.
- P cn ⁇ P- cn QP > P ⁇ P SD PP P- P rt P rt ⁇ ⁇ p- ⁇ ! -> ⁇ P. rt p- P ⁇ ⁇ N ⁇ tr SD ö P- P ⁇ ⁇ Hi P. vq rt vq P 1 Q pr P- cn ⁇ PP - ⁇ P ⁇ cn ⁇ PP ⁇ cn ⁇ ⁇ P vq P (D ⁇ s: SD Hi vq P- rt ⁇ P cn P rt tr Pl ⁇ ! P rt p. ⁇ P EP s: PPN & SP 1 P P- P: o cn PP ⁇ PP ⁇
- the area of the gas discharge lamp 1 is considerably reduced due to the desired large capacitive coupling with the electrical mass M of the lamp current flowing in the gas discharge path.
- the capacitive coupling C ⁇ acts like a short circuit that branches off a larger part of the lamp current at the beginning of the central region 11 of the gas discharge lamp 1 from the gas discharge path, leads past the central region 11 and feeds it back into the gas discharge path at the end of the central region 11. Due to the reduced lamp current in the central region 11 of the gas discharge lamp 1, the heat development there is also considerably reduced, so that the coldest point is created in the gas discharge space and the mercury contained in the gas atmosphere can condense. In this way, the mercury vapor pressure in the gas discharge space is regulated.
- FIG. 4 shows an example of the above-described course of the lamp current over the length L of the gas discharge lamp 1.
- the exemplary embodiment of the lighting unit according to the invention shown in FIG. 5 has four of the gas discharge lamps 1 shown in FIG. 3, which are arranged side by side in a light box 12 in such a way that the electrodes 2 and 3 on one side 13 of the light box 12 are made of the same protrude and the gas discharge lamps 1 rest with their central regions 11 on the opposite side 14 of the light box 12 in electrically capacitive and in thermal contact.
- the light box 12 forms both the electrical mass M and a thermal mass for dissipating the heat transferred from the gas discharge lamps 1 to the side 14.
- On the side 13 of the light box 12 there is a compartment 15 for accommodating the high-frequency driver circuits 6, which are combined here in a unit 16, for the individual fluorescent lamps 1.
- the light box 12 is mirrored on the inside and, as FIG. 6 shows in a partial cross section through the lighting unit according to FIG. 5, on the side facing the viewer with a diffuser 17 for uniform light distribution.
- the capacitive coupling of the central region 11 of the gas discharge lamp 1 to the electrical mass M formed by the light box 12 can be reinforced, for example, by a metal coating on the relevant point of the gas discharge lamp 1 or by a suitable arrangement of a sheet metal part.
- the gas discharge lamp 1 with its central region 11 can also be arranged in a suitable recess in the side 14 of the light box 12 or, alternatively to the example according to FIG. 5, can rest against the light box 12.
- the thermal and electrical ground coupling can finally be increased using thermal paste.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10039966 | 2000-08-16 | ||
DE10039966A DE10039966A1 (de) | 2000-08-16 | 2000-08-16 | Beleuchtungseinheit mit mindestens einer im Wesentlichen U-förmigen Gasentladungslampe |
PCT/DE2001/003130 WO2002015227A1 (de) | 2000-08-16 | 2001-08-16 | Beleuchtungseinheit mit mindestens einer, im wesentlichen u-förmigen gasentladungslampe |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1309984A1 true EP1309984A1 (de) | 2003-05-14 |
Family
ID=7652580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01962641A Withdrawn EP1309984A1 (de) | 2000-08-16 | 2001-08-16 | Beleuchtungseinheit mit mindestens einer, im wesentlichen u-förmigen gasentladungslampe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6822398B2 (ko) |
EP (1) | EP1309984A1 (ko) |
JP (1) | JP2004507044A (ko) |
KR (1) | KR100846684B1 (ko) |
DE (1) | DE10039966A1 (ko) |
WO (1) | WO2002015227A1 (ko) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3852307B2 (ja) * | 2001-07-13 | 2006-11-29 | ウシオ電機株式会社 | 光源装置 |
JP2005190835A (ja) * | 2003-12-25 | 2005-07-14 | Funai Electric Co Ltd | 液晶テレビ用バックライト装置 |
KR101016289B1 (ko) * | 2004-06-30 | 2011-02-22 | 엘지디스플레이 주식회사 | 백라이트 유닛 |
DE102004056304B4 (de) * | 2004-11-22 | 2007-04-05 | Minebea Co., Ltd. | Beleuchtungsanordung mit einer Leuchtstofflampe, insbesondere einer Kaltkathodenlampe |
WO2006120626A2 (en) * | 2005-05-12 | 2006-11-16 | Koninklijke Philips Electronics N.V. | Illumination system for illuminating display devices, and display device comprising such an illumination system |
KR101142077B1 (ko) * | 2005-05-30 | 2012-05-03 | 엘지디스플레이 주식회사 | 유자형 외부전극형광램프 및 이를 이용한백라이트어셈블리와 액정표시장치모듈 |
WO2007042968A1 (en) * | 2005-10-11 | 2007-04-19 | Koninklijke Philips Electronics N.V. | Lcd backlighting unit |
TWI394130B (zh) * | 2008-03-26 | 2013-04-21 | Au Optronics Corp | 顯示器及其背光模組 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01104643U (ko) * | 1988-01-04 | 1989-07-14 | ||
JPH03185795A (ja) * | 1989-12-14 | 1991-08-13 | Toshiba Lighting & Technol Corp | 回路基板装置 |
JPH04264426A (ja) * | 1991-02-19 | 1992-09-21 | Sony Corp | 光源装置 |
US5309062A (en) * | 1992-05-20 | 1994-05-03 | Progressive Technology In Lighting, Inc. | Three-way compact fluorescent lamp system utilizing an electronic ballast having a variable frequency oscillator |
JPH0644279U (ja) * | 1992-11-25 | 1994-06-10 | シチズン時計株式会社 | 照明装置 |
JPH08122776A (ja) * | 1994-10-24 | 1996-05-17 | Seiko Epson Corp | 液晶テレビ用バックライト |
US5767630A (en) * | 1996-09-18 | 1998-06-16 | Linear Technology Corporation | Methods and apparatus for obtaining floating output drive to fluorescent lamps and minimizing installation requirements |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8802127A (nl) * | 1987-09-17 | 1989-04-17 | Roehm Gmbh | Uit verenigbare polymeermengsels vormende polymeren opgebouwde voortbrengsels. |
JPH02157789A (ja) * | 1988-12-09 | 1990-06-18 | Toshiba Corp | バックライト装置 |
US5485057A (en) * | 1993-09-02 | 1996-01-16 | Smallwood; Robert C. | Gas discharge lamp and power distribution system therefor |
JPH09504902A (ja) * | 1993-11-03 | 1997-05-13 | サイエンス アプリケーションズ インターナショナル コーポレイション | 電子ディスプレイデバイスの背面照明のための高効率紫外線バックライトシステム |
JPH07272521A (ja) * | 1994-03-29 | 1995-10-20 | Nec Home Electron Ltd | バックライトユニット |
TW426203U (en) | 1996-09-18 | 2001-03-11 | Koninkl Philips Electronics Nv | Backlight luminaire |
US6100653A (en) * | 1996-10-16 | 2000-08-08 | Tapeswitch Corporation | Inductive-resistive fluorescent apparatus and method |
US5909085A (en) * | 1997-03-17 | 1999-06-01 | Korry Electronics Co. | Hybrid luminosity control system for a fluorescent lamp |
JP3687881B2 (ja) * | 1997-07-08 | 2005-08-24 | 富士通株式会社 | 放電管及び放電管の放電方法 |
GB9803587D0 (en) * | 1998-02-23 | 1998-04-15 | Smiths Industries Plc | Gas discharge lamps and systems |
US6040778A (en) * | 1998-04-20 | 2000-03-21 | France/Scott Fetzer Company | Neon power supply with midpoint ground detection and diagnostic functions |
US6359761B1 (en) * | 2000-03-22 | 2002-03-19 | Maf Technologies, Corp. | Secondary ground fault protection |
-
2000
- 2000-08-16 DE DE10039966A patent/DE10039966A1/de not_active Ceased
-
2001
- 2001-08-16 EP EP01962641A patent/EP1309984A1/de not_active Withdrawn
- 2001-08-16 WO PCT/DE2001/003130 patent/WO2002015227A1/de active Application Filing
- 2001-08-16 KR KR1020037002095A patent/KR100846684B1/ko not_active IP Right Cessation
- 2001-08-16 JP JP2002520267A patent/JP2004507044A/ja active Pending
-
2003
- 2003-02-19 US US10/367,280 patent/US6822398B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01104643U (ko) * | 1988-01-04 | 1989-07-14 | ||
JPH0641335Y2 (ja) * | 1988-01-04 | 1994-10-26 | 東芝ライテック株式会社 | 機器用蛍光放電ランプ |
JPH03185795A (ja) * | 1989-12-14 | 1991-08-13 | Toshiba Lighting & Technol Corp | 回路基板装置 |
JPH04264426A (ja) * | 1991-02-19 | 1992-09-21 | Sony Corp | 光源装置 |
JP3220993B2 (ja) * | 1991-02-19 | 2001-10-22 | ソニー株式会社 | 光源装置 |
US5309062A (en) * | 1992-05-20 | 1994-05-03 | Progressive Technology In Lighting, Inc. | Three-way compact fluorescent lamp system utilizing an electronic ballast having a variable frequency oscillator |
JPH0644279U (ja) * | 1992-11-25 | 1994-06-10 | シチズン時計株式会社 | 照明装置 |
JPH08122776A (ja) * | 1994-10-24 | 1996-05-17 | Seiko Epson Corp | 液晶テレビ用バックライト |
US5767630A (en) * | 1996-09-18 | 1998-06-16 | Linear Technology Corporation | Methods and apparatus for obtaining floating output drive to fluorescent lamps and minimizing installation requirements |
Non-Patent Citations (1)
Title |
---|
See also references of WO0215227A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2004507044A (ja) | 2004-03-04 |
US20040051431A1 (en) | 2004-03-18 |
KR20030036696A (ko) | 2003-05-09 |
WO2002015227A1 (de) | 2002-02-21 |
US6822398B2 (en) | 2004-11-23 |
KR100846684B1 (ko) | 2008-07-16 |
DE10039966A1 (de) | 2002-03-07 |
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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: 20030120 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WAMMES & PARTNER GMBH |
|
17Q | First examination report despatched |
Effective date: 20100615 |
|
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: 20140311 |