EP1519406A1 - Flache Lampenstruktur - Google Patents

Flache Lampenstruktur Download PDF

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Publication number
EP1519406A1
EP1519406A1 EP04008363A EP04008363A EP1519406A1 EP 1519406 A1 EP1519406 A1 EP 1519406A1 EP 04008363 A EP04008363 A EP 04008363A EP 04008363 A EP04008363 A EP 04008363A EP 1519406 A1 EP1519406 A1 EP 1519406A1
Authority
EP
European Patent Office
Prior art keywords
flat lamp
dielectric substrate
lamp structure
discharge chamber
gas discharge
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Withdrawn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
EP04008363A
Other languages
English (en)
French (fr)
Inventor
Yui-Shin Fran
Lai-Cheng Chen
Cheng-Yi Chang
Chien-Chung Wu
Jui-Hsia Chen
Jer-Shien Yang
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.)
Delta Optoelectronics Inc
Original Assignee
Delta Optoelectronics Inc
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
Priority claimed from US10/604,588 external-priority patent/US7148626B2/en
Application filed by Delta Optoelectronics Inc filed Critical Delta Optoelectronics Inc
Publication of EP1519406A1 publication Critical patent/EP1519406A1/de
Withdrawn legal-status Critical Current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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
    • 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
    • H01J61/305—Flat vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around the vessel

Definitions

  • the present invention relates to a flat lamp structure, and in particular, to a flat lamp structure having electrodes positioned on the outer wall of a gas discharge chamber.
  • the display screen used in mobile phones, digital cameras, digital video cameras, notebook computers, and desk-top computers is an essential interactive interface.
  • the display screen provides the user with great convenience of operation..
  • the LCD panel per se is non-luminous, and a back light module must be provided at the bottom of the LCD panel to provide a light source for displaying.
  • the flat lamp provides excellent luminosity and uniformity and also provides a larger surface area light source. Therefore, it is widely applied as a back light source for LCD panels and for other fields of applications.
  • the flat lamp is a plasma luminous component, essentially utilizing the electrons emitted from the cathode to collide with the inert gas between the cathode and anode within the gas discharge chamber, and the gas is ionized and excited to form plasma. After that the excited state atoms of the plasma return to the ground state by emission of UV rays, the UV rays further excite the fluorescence substance within the flat lamp, producing visible light.
  • FIG. 1 is a schematic view showing the structure of a conventional flat lamp.
  • the conventional flat lamp structure comprises a gas discharge chamber 100, a fluorescence substance 102, a discharge gas 104, electrodes 106 and dielectric layers 108.
  • the gas discharge chamber 100 comprises a plate 100a, a second plate 100b and strip 100c mounted between the plate 100a and the plate 100b, and is connected to the edge of the plate 100a and the edge of plate 100b, forming a closed chamber.
  • the conventional electrode 106 is generally a silver electrode, and the electrode 106 is disposed on the plate 100a.
  • the electrode is generally covered with the dielectric layer 108 so as to protect the electrode 106 from damaging by the collision of the ions.
  • the dielectric layer 108 covering electrode 106 is positioned at the inner wall of the gas discharge chamber 100.
  • the gas discharge chamber 100 is charged with a gas 104.
  • the gas 104 includes Xe, Ne and Ar, or other inert gas.
  • the fluorescence substance 102 is disposed on the inner wall of the gas discharge chamber 100, for example on the surface of the plate 100b, on the surface of the dielectric layer 108, and on the surface of the plate 100a not covered by the dielectric layer 108.
  • the electrode 106 emits electrons to collide with the discharge gas 104 within the gas discharge chamber 100, and the discharge gas 104 is ionized and excited to form plasma.
  • the excited state atoms of the plasma return to the ground state by emitting UV rays, and the emitted UV rays further excite the fluorescence substance 102 within the inner wall of the gas discharge chamber 100 to produce visible light.
  • the high energy ions released by the plasma generally collide through the dielectric layer, and may reach further to the electrode 106.
  • the longevity of the flat lamp is greatly reduced.
  • the dielectric layer 108 covering the electrode 106 is generally fabricated by a multiple screen printing process the thickness of which is controlled between 200 ⁇ m to 250 ⁇ m.
  • the fabrication process of the multiple screen printing is complicated, and the test sample capacity and yield are low.
  • multiple screen printing can easily cause unevenness in the thickness of the film, causing each of the test samples or a single test sample with different optical characteristics of different region to differ with each other. Due to the fact that the optical characteristics of the test sample cannot be easily controlled, the designing cost for the driving circuit is increased.
  • Another object of the present invention is to provide a flat lamp structure which effectively avoids the unevenness occurring on the dielectric substrate film due to multiple screen printing, thereby improving the luminosity and the uniformity of the flat lamp.
  • the present invention provides a flat lamp structure comprising a gas discharge chamber; a fluorescence substance disposed on the inner wall of the gas discharge chamber; a discharge gas disposed in the gas discharge chamber; and a plurality of electrodes disposed on the outer wall of the gas discharge chamber.
  • the gas discharge chamber for example, comprises a dielectric substrate; a plate disposed on the upper portion of the dielectric substrate; and a plurality of strips disposed between the dielectric substrate and the plate, and the plate connected to the edge of the dielectric substrate.
  • the present invention provides a flat lamp structure comprising a gas discharge chamber; a fluorescence substance disposed on the inner wall of the gas discharge chamber; a discharge gas disposed in the gas discharge chamber; a plurality of electrodes disposed on the outer wall of the gas discharge chamber; and a spacer disposed on the gas discharge chamber to enhance the strength of the gas discharge chamber.
  • the gas discharge chamber for example, comprises a dielectric substrate; a plate disposed on the upper portion of the dielectric substrate; and a plurality of strips disposed between the dielectric substrate and the plate, and plate connected to the edge of the dielectric substrate.
  • the thickness of the dielectric substrate is, for example, between 0.3mm and 1.1mm, and the distance between the dielectric substrate and the plate, for example, is between 0.5mm and 2.0mm.
  • the gas charged into the gas discharge chamber for example, is Xe, Ne or Ar
  • the electrodes for example, include silver electrode or copper electrode.
  • the lower portion of the dielectric substrate for example, is stuck to a carrier substrate for carrying the gas discharge chamber containing the electrode.
  • an adhesive for example, is disposed between the dielectric substrate and the carrier substrate and connects the dielectric substrate and the carrier substrate.
  • the adhesive for example, includes glass adhesive, UV curing adhesive or thermal curing adhesive.
  • the electrode is fabricated on the outer wall of the gas discharge chamber, and by means of the dielectric substrate as dielectric material for protecting the electrode, the uniformity with respect to thickness is good and the ability to withstand the collision of ions is excellent.
  • the present invention does not require a dielectric layer formed by multiple screen printing covering the electrode, resulting in uniformity of luminosity and significant improvement in longevity.
  • FIG. 1 is a schematic view of a conventional flat lamp structure.
  • FIGS. 2 and 3 are schematic views of a first preferred embodiment flat lamp in accordance with the present invention.
  • FIGS. 4 and 5 are schematic views of a second preferred embodiment flat lamp in accordance with the present invention.
  • FIGS. 2 and 3 show schematically the flat lamp structure of a first preferred embodiment of the present invention.
  • the flat lamp comprises a gas discharge chamber 200, fluorescence substance 202, a discharge gas 204 and a plurality of electrodes 206.
  • the material for forming the gas discharge chamber is, for example, glass.
  • the gas discharge chamber 200 for instance, is a dielectric substrate 200a, a plate 200b and a plurality of strips 200c.
  • the plate 200b is disposed on the upper portion of the dielectric substrate 200a, and the strips 200c are disposed between the dielectric substrate 200a and the plate 200b, and are connected to the dielectric substrate 200a and the edge of the plate 200b.
  • the thickness of the dielectric substrate is, for example, between 0.3mm to 1.1mm, and the distance between the dielectric substrate 200a and the plate 200b is, for example, between 0.5mm and 2.0mm.
  • the fluorescence substance 202 is disposed on the inner wall of the gas discharged chamber 200, and the fluorescence substance 202 is generally disposed on the dielectric substrate 200a and the surface of the plate 200b.
  • the gas 204 is charged into the gas discharge chamber 200, and examples of the gas are Xe, Ne, and Ar.
  • the electrode 206 is disposed on the outer wall of the gas discharge chamber 200. Examples of the electrodes are silver electrode or copper electrode.
  • the electrode 206 on the outer wall of the gas discharge chamber 200 is driven so that the electrode within the gas discharge chamber 202 partially emits electrons which collide with the gas 204, and the gas 204 is ionized and excited to form plasma.
  • the excited state atoms of the plasma return to the ground state by way of emission of UV rays, and the emitted UV rays further excite the fluorescence substance 202 on the inner wall of the gas discharge chamber 200 so as to produce visible light.
  • the electrodes 206 isolated by the dielectric substrate 200a, form an electric field within the gas discharge chamber 200, and the thickness of the dielectric substrate 200a directly affects the difficulty of the driving process.
  • the thickness of the dielectric substrate 200a is large, the flat lamp is more difficult to drive, and vice versa; to facilitate the driving process, a thinner dielectric material 200a is used.
  • the dielectric substrate 200a may be broken for the reason that the substrate 200a cannot withstand the external atmospheric pressure.
  • the present preferred embodiment provides a flat lamp structure, as shown in FIG. 3.
  • the present flat lamp structure in order to obtain a balance between the difficulty of the driving process and the strength of the dielectric substrate 200a, the present flat lamp structure, as shown in FIG. 2, is supported on a carrier substrate 210, and the dielectric substrate 200a and the carrier substrate 210 are connected, for example, by means of an adhesive 208 having a thickness between 0.1mm and 0.3mm.
  • the adhesive 208 includes, for example, glass adhesive, UV curing adhesive or thermal curing adhesive.
  • the structural body constructed by the dielectric substrate 200a and the carrier substrate 210 can withstand the external atmospheric pressure, thus, as a whole, the strength of the flat lamp is enhanced.
  • FIGS. 4 and 5 show a flat lamp structure in accordance with the second preferred embodiment.
  • the flat lamp comprises a gas discharge chamber 200, a fluorescence substance 202, a discharge gas 204, a plurality of electrodes 206 and at least a spacer 300, wherein the material of the gas discharge chamber 200 is, for example, glass.
  • the gas discharge chamber 200 comprises a dielectric substrate 200a, a plate 200b and a plurality of strips 200c.
  • the plate substrate 200b is disposed on the upper portion of the dielectric substrate 200a, and the strips 200c are disposed between the dielectric substrate 200a and the plate 200b, and the dielectric substrate 200a and the edge of the plate 200b are connected.
  • the thickness of the dielectric substrate 200a is, for example, between 0.3mm and 1.1 mm
  • the distance between the dielectric substrate 200a and the plate 200b is, for example, between 0.5mm and 2.0mm.
  • the fluorescence substance 202 is disposed on the inner wall of the gas disposed chamber 200, and the fluorescence substance 202 is generally disposed on the dielectric substrate 200a and the surface of the plate 200b.
  • the gas 204 is charged into the gas discharge chamber 200, and an example of the gas is Xe.
  • the electrode 206 is disposed on the outer wall of the gas discharge chamber 200. An example of the electrode is silver electrode.
  • the flat lamp structure of the present invention is similar to that of the first preferred embodiment, and the only difference is on the design of the spacer 300.
  • the spacer 300 is designed out of concern for the difficulty of the driving process and the strength of the dielectric substrate 200a; the spacer 300 of the gas discharge chamber 200b can withstand the dielectric substrate 200a and the surface of the plate 200b such that the strength of the dielectric substrate 200a can be enhanced, and its breakage as a result of its inablity to withstand the external atmospheric pressure will not occurr.
  • the flat lamp structure similar to that shown in FIG. 3, the only difference is on the design of the spacer 300.
  • the dual reinforcement of the spacer 300 with the combination of the carrier 210 deals with the difficulty of the driving process and the strength of the dielectric substrate 200a.
  • the dielectric substrate with controllable thickness and uniformity is used to substitute conventional dielectric layer formed from multiple screen printing process and the electrode is disposed on the outer wall of the gas discharge chamber to form external electrodes.
  • the flat lamp structure of the present invention possesses the following advantages:

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
EP04008363A 2003-07-31 2004-04-06 Flache Lampenstruktur Withdrawn EP1519406A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US604588 1996-02-21
US10/604,588 US7148626B2 (en) 2002-12-24 2003-07-31 Flat lamp structure with electrodes disposed on outer surface of the substrate

Publications (1)

Publication Number Publication Date
EP1519406A1 true EP1519406A1 (de) 2005-03-30

Family

ID=34193425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008363A Withdrawn EP1519406A1 (de) 2003-07-31 2004-04-06 Flache Lampenstruktur

Country Status (1)

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EP (1) EP1519406A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916698A1 (de) * 2006-10-25 2008-04-30 Delta Electronics, Inc. Flache Leuchtstofflampe

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4983881A (en) * 1988-01-15 1991-01-08 Asea Brown Boveri Ltd. High-power radiation source
EP0521553A2 (de) * 1991-07-01 1993-01-07 Koninklijke Philips Electronics N.V. Hochdrucksglimmentladungslampe
WO1994014180A1 (en) * 1992-12-16 1994-06-23 Durel Corporation Electroluminescent lamp devices and their manufacture
US5592047A (en) * 1994-10-25 1997-01-07 Samsung Display Devices Co., Ltd. Flat glow discharge lamp
US6034470A (en) * 1997-03-21 2000-03-07 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Flat fluorescent lamp with specific electrode structuring
US20020079795A1 (en) * 2000-12-22 2002-06-27 Son Suk Min Flat luminescence lamp and method for fabricating the same
US20020117959A1 (en) * 2001-02-27 2002-08-29 Mark Winsor Open chamber photoluminescent lamp
FR2843483A1 (fr) * 2002-08-06 2004-02-13 Saint Gobain Lampe plane, procede de fabrication et application
US6744195B2 (en) * 2000-12-22 2004-06-01 Lg. Philips Lcd Co., Ltd. Flat luminescence lamp

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4983881A (en) * 1988-01-15 1991-01-08 Asea Brown Boveri Ltd. High-power radiation source
EP0521553A2 (de) * 1991-07-01 1993-01-07 Koninklijke Philips Electronics N.V. Hochdrucksglimmentladungslampe
WO1994014180A1 (en) * 1992-12-16 1994-06-23 Durel Corporation Electroluminescent lamp devices and their manufacture
US5592047A (en) * 1994-10-25 1997-01-07 Samsung Display Devices Co., Ltd. Flat glow discharge lamp
US6034470A (en) * 1997-03-21 2000-03-07 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Flat fluorescent lamp with specific electrode structuring
US20020079795A1 (en) * 2000-12-22 2002-06-27 Son Suk Min Flat luminescence lamp and method for fabricating the same
US6744195B2 (en) * 2000-12-22 2004-06-01 Lg. Philips Lcd Co., Ltd. Flat luminescence lamp
US20020117959A1 (en) * 2001-02-27 2002-08-29 Mark Winsor Open chamber photoluminescent lamp
US6762556B2 (en) * 2001-02-27 2004-07-13 Winsor Corporation Open chamber photoluminescent lamp
FR2843483A1 (fr) * 2002-08-06 2004-02-13 Saint Gobain Lampe plane, procede de fabrication et application
WO2004015739A2 (fr) * 2002-08-06 2004-02-19 Saint-Gobain Glass France Lampe plane, procede de fabrication et application

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MIKOSHIBA S ED - SOCIETY FOR INFORMATION DISPLAY: "INVITED PAPERD XE DISCHARGE BACKLIGHTS FOR LCDS", 2001 SID INTERNATIONAL SYMPOSIUM DIGEST OF TECHNICAL PAPERS. SAN JOSE, CA, JUNE 5 - 7, 2001, SID INTERNATIONAL SYMPOSIUM DIGEST OF TECHNICAL PAPERS, SAN JOSE, CA : SID, US, vol. 32, June 2001 (2001-06-01), pages 286 - 289, XP001054087 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916698A1 (de) * 2006-10-25 2008-04-30 Delta Electronics, Inc. Flache Leuchtstofflampe

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