US3914000A - Method of making tubeless gas panel - Google Patents

Method of making tubeless gas panel Download PDF

Info

Publication number
US3914000A
US3914000A US351672A US35167273A US3914000A US 3914000 A US3914000 A US 3914000A US 351672 A US351672 A US 351672A US 35167273 A US35167273 A US 35167273A US 3914000 A US3914000 A US 3914000A
Authority
US
United States
Prior art keywords
panel
gas
preform
display
passageway
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.)
Expired - Lifetime
Application number
US351672A
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English (en)
Inventor
Martin Beckerman
John A Murphy
John V Orlandi
George W Smith
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US351672A priority Critical patent/US3914000A/en
Priority to GB625874A priority patent/GB1408374A/en
Priority to FR7407864A priority patent/FR2225833B1/fr
Priority to DE2412021A priority patent/DE2412021A1/de
Priority to JP49028693A priority patent/JPS503774A/ja
Publication of USB351672I5 publication Critical patent/USB351672I5/en
Application granted granted Critical
Publication of US3914000A publication Critical patent/US3914000A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/261—Sealing together parts of vessels the vessel being for a flat panel display

Definitions

  • the panel is sealed to lock in the desired display gas.
  • the sealing is accomplished by providing a hole in the back panel in which is placed a plug so shaped as to allow the gas panel to be initially evacuated and thereafter back filled with gas. Once the panel is back filled, the plug is selectively melted to fill the hole and then allowed to solidify to complete the seal.
  • FIG.2 4 Claims, 5 Drawing Figures DISPLAY GAS 47 US. Patent Oct. 21, 1975 FIG.2
  • FIG.4 PRIOR ART FIG.4
  • Another object of the invention is to provide a rela- BACKGROUNDOF THE INVENTION cating a gas panel and, more particularly, to an improved method for sealing a gas panel. assembly containing the display gas.
  • the tube is sealed off.
  • One of the objects of the invention is to provide a method of making a gas panel which eliminates the need for any tubulation for evacuating and back filling the gas panel during assembly thereof.
  • the manner in which the above and other ob- 3 jects of. the invention are attained is toprovide a hole withinthe back panel which communicates with the inner chamber in an area removed from the viewing portion of the display.
  • a glass plug is placed in the hole.
  • the plug is so shaped, such as by having a hole in the center, to allow gases to be first evacuated from the chamber and then allow a display gas to be admitted to the chamber.
  • the display gas isback filled into the chamber,then the plug is selectively softened or melted so as tocompletely fill the hole. Upon solidification, the plug then completely seals the dis-- 'playgas, within the inner chamber.
  • FIGul is a side elevationalview, partly in section
  • FIG. 2 is a view similar to FIG. 1 showing the gas panel atanother stage'of completion in accordance with the prior art method
  • FIG. 3 is a view similar to FIG. 1 on an enlarged scale illustrating a portion vention
  • FIGS. 4-and 5 are views similar to FIG. 3 but with portions removed, illustrating further steps of the method of the invention. It is to be understood in connection with the invention that it is a subset or step of the overall fabrication process where the overall process can be in accordance with prior art techniques using the known materials and procedures) The difference between the prior'art and the present technique will be pointed'out in detail below. Reference may be had to the aforementioned copending applications for details which are not necessary for an understandingof the method of the invention.
  • FIG. 1 shows a part of a gas panel display after the completion of one step in the fabrication.
  • a front panel subassembly l0 and back panel subassembly 11 are held in a predetermined fixed spaced relationship relative to each other by a glass spacer 16.
  • a glass seal 15 joins panels 10 and 11 together in such amanner as to fonn an inner chamber 17 that will eventually be filled with the display gas.
  • a necked down glass tube 13 has its lower end fitted into a stepped'down cylindrical hole 12 and is joined to back panel ll by a glass seal 14 of the same composition or reflow properties as seal 15.
  • the partially completed back panel is placed in an oven for a bake-out, a back fill and a seal steps during the course of which the upper end of tube 13 is first connected to a manifold for first evacuating chamber 17 and back filling it with the desired display gas.
  • the necked down portion of tube 13 can be melted to seal off the upper end of tube 13 as shown of the method embodying the in-' in FIG. 2 and completely seal the display gas within the inner chamber of the gas panel assembly. It can be readily seen that the tube protrudes from the back panel 11 and is highly subject to breakage during mechanical handling.
  • the gas panel assembly is first partially constructed so as to form the subassembly of front and back panels and .11 connected by a seal 15 and separated by a spacer 16 to forman inner chamber 17.
  • Back panel 11 is provided with a hole 20 at a section thereof which lies outside of the viewing area of panel 10 but which communicates with chamber 17.
  • the shape of hole 20 is designed to receive a glass plug 21 and support it until the plug is finally melted.
  • hole 20 has a counter sunk upper portion terminating in a cylindrical lower portion of reduced diameter, so that the lower edge of plug 21 can be received in the enlarged upper portion and supported by the walls.
  • plug 21 is placed in hole 20 either before or after the subassembly is placed in an oven for bake-out and back fill.
  • the shape of plug 21 includes a central passage which allows gases to be withdrawn from chamber 17 during the evacuation and allows the display gas to be admitted to chamber 17 during the back fill.
  • plug 21 has a cylindrical tubular shape provided with the central passage way for accomplishing this.
  • a selectively energizable annular electrical heater 22 is positioned around plug 21. This heater is normally de-energized until after the back fill operation has occurred. Then,
  • plug 21 is melted or softened to a sufficient viscosity allowing it to flow by gravity into and partially fill hole 20. Upon solidification, as shown in FIG. 5, plug 21' is formed which completely seals the display gas in inner chamber 17.
  • the amount of material in plug 21 is sufficient to at least partially fill hole 20 when the plug ismelted but without having any excess material project outwardly beyond the plane of the back surface of panel 11. While the lower end of plug 21" is shown in FIG. 5 as not touching panel 10, it may sometimes happen that it would because of the relatively small distance (in the order of 4 mils) between 10 and 11. Since plug 21 isoutside of the viewing area, this touching has no adverse effect.
  • plug 21 The selective melting of plug 20 is due to the composition of plug 21 having a much lower softening point than that of the material of back panel 11. To accomplish this, it is preferable that plug 21 be of the same material as that of seal 15. While the selection of compatible materials is well within the skill of the art and many different materials can be used, the following glasses may be used, it being understood that the following compositions are merely examples and are in no way intended to limit the invention.
  • the glass substrate of panel 11 may be of the following composition:
  • the above particular glass has a softening point of, 729C.
  • Plug 21 may have the following percentage by weight composition:
  • PbO 64.0 2 15.3 ZnO l4.9 CuO 3.0 Si O; 1.5 a Big O; 1.3
  • This particular glass has a softening point of 419C.
  • said back panel with a passageway communicating between said inner chamber and the exterior of said back panel; detachably supporting a preform on said back panel in said passageway, said preform being shaped to allow gas to flow through said passageway; and, after said backfilling step has beenlcompleted and while said panel assembly is in said atmosphere of display gas, melting said preform and allowing it to flow downwardly by gravity so as to fill said passageway, and solidifying said melted preform to seal said display gas in said inner chamber.
  • said preform is of a glass material having a softening point lower than that of the substrate of said back panel, whereby said melt-. ing step selectively melts said preform without softening said substrate.
  • the volume of material in said preform is such as to seal said passageway without any preform material projecting outwardly beyond the plane of. the back surface of said back panel.
  • said providing step includes providing said passageway with a countersunk portion facing upwardly,.and said preform is provided with a tubular cylindrical shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Glass Compositions (AREA)
US351672A 1973-04-16 1973-04-16 Method of making tubeless gas panel Expired - Lifetime US3914000A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US351672A US3914000A (en) 1973-04-16 1973-04-16 Method of making tubeless gas panel
GB625874A GB1408374A (en) 1973-04-16 1974-02-12 Method of making a gas discharge display device
FR7407864A FR2225833B1 (ja) 1973-04-16 1974-02-28
DE2412021A DE2412021A1 (de) 1973-04-16 1974-03-13 Verfahren zur herstellung von gasentladungsanzeigetafeln
JP49028693A JPS503774A (ja) 1973-04-16 1974-03-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US351672A US3914000A (en) 1973-04-16 1973-04-16 Method of making tubeless gas panel

Publications (2)

Publication Number Publication Date
USB351672I5 USB351672I5 (ja) 1975-01-28
US3914000A true US3914000A (en) 1975-10-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US351672A Expired - Lifetime US3914000A (en) 1973-04-16 1973-04-16 Method of making tubeless gas panel

Country Status (5)

Country Link
US (1) US3914000A (ja)
JP (1) JPS503774A (ja)
DE (1) DE2412021A1 (ja)
FR (1) FR2225833B1 (ja)
GB (1) GB1408374A (ja)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032316A (en) * 1975-11-26 1977-06-28 Burroughs Corporation Method of sealing a glass/tubulation to a plate
US4082392A (en) * 1976-04-05 1978-04-04 Golin Jeffrey R Gas discharge lamp preparation process
US4182540A (en) * 1977-12-22 1980-01-08 Beckman Instruments, Inc. Method of sealing gas discharge displays
US4207724A (en) * 1978-05-23 1980-06-17 R. L. Kuss And Company Method of making pulsation bag
EP0055416A2 (en) * 1980-12-26 1982-07-07 Kabushiki Kaisha Toshiba Method of sealing a tube using a laser beam
US4380855A (en) * 1980-01-18 1983-04-26 University Of Rochester Method for filling hollow shells with gas for use as laser fusion targets
US4921022A (en) * 1988-01-11 1990-05-01 Peter Lisec Apparatus for filling insulating glass with a special gas
EP0451362A2 (en) * 1990-04-11 1991-10-16 Mitsubishi Denki Kabushiki Kaisha Plasma display panel and a process for producing the same
US5657607A (en) * 1989-08-23 1997-08-19 University Of Sydney Thermally insulating glass panel and method of construction
US5664395A (en) * 1992-01-31 1997-09-09 The University Of Sydney Thermally insulating glass panels
US5897927A (en) * 1997-06-30 1999-04-27 Industrial Technology Research Institute Seal for vacuum devices and methods for making same
US5902652A (en) * 1993-06-30 1999-05-11 University Of Sydney Methods of construction of evacuated glazing
US5952775A (en) * 1994-06-09 1999-09-14 Canon Kabushiki Kaisha Image-forming apparatus having vent tubes
US6467225B1 (en) * 1998-10-05 2002-10-22 Nippon Sheet Glass Co., Ltd. Glass sheet and glass window for vehicles
US6531818B1 (en) * 1999-07-13 2003-03-11 Thomson Licensing S. A. Pumping tube for pumping and filling flat display panel
US20030067366A1 (en) * 2001-10-10 2003-04-10 Alain Normanni Tube for pumping a space between two tiles, especially for a plasma display
KR100379575B1 (ko) * 1996-04-24 2003-06-19 오리온전기 주식회사 평판표시소자의 밀봉구
US6591635B1 (en) * 2000-04-24 2003-07-15 Fujitsu Hitachi Plasma Display Limited Method of bonding tubulation tubing of display panel
WO2003105178A2 (de) * 2002-06-07 2003-12-18 Patent-Treuhand-Gesell Schaft Für Elektrische Glühlampen Mbh Herstellungsverfahren für gasentladungsvorrichtung
US6692600B2 (en) 2001-09-14 2004-02-17 Guardian Industries Corp. VIG evacuation with plasma excitation
US20050140297A1 (en) * 2003-12-29 2005-06-30 Po-Cheng Chen Tubeless plasma display panel and manufacture of plasma display panel
CN1323416C (zh) * 2003-01-08 2007-06-27 中国科学院长春光学精密机械与物理研究所 一种平板玻璃真空显示器件的封口工艺方法
US7473152B1 (en) * 2000-07-31 2009-01-06 Canon Kabushiki Kaisha Sealing of flat-panel device
US20090282781A1 (en) * 2008-05-14 2009-11-19 Tsinghua University Vacuum device and method for packaging same
US20090288363A1 (en) * 2008-05-23 2009-11-26 Tsinghua University Vacuum packaging system
US20090288364A1 (en) * 2008-05-23 2009-11-26 Tsinghua University Vacuum packaging system
US20090313821A1 (en) * 2008-06-20 2009-12-24 Toyoda Gosei Co., Ltd. Method of manufacturing an inflator
US20090313946A1 (en) * 2008-06-18 2009-12-24 Tsinghua University Vacuum device and method for packaging same
US20120148795A1 (en) * 2010-01-05 2012-06-14 Lg Hausys, Ltd. Method for forming a vent port in a glass panel, and glass panel product manufactured using the same
US20130052932A1 (en) * 2010-01-26 2013-02-28 Amx Automation Technologies Gmbh Method and device for evacuating hollow spaces
US20130294048A1 (en) * 2011-01-18 2013-11-07 Nippon Electric Glass Co., Ltd. Light emitting device, cell for light emitting device, and method for manufacturing light emitting device
US9677323B2 (en) 2011-05-31 2017-06-13 Guardian Industries Corp. Static plasma grid evacuation techniques for vacuum insulating glass (VIG) units

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JPS52130274A (en) * 1976-04-24 1977-11-01 Ise Electronics Corp Vacuum part and device for sealing same
JPS5492054A (en) * 1977-12-29 1979-07-20 Matsushita Electronics Corp Manufacture of display tube
JPS5650032A (en) * 1979-09-28 1981-05-07 Beckman Instruments Inc Method of sealing gas discharge display
JPS6180783A (ja) * 1984-09-28 1986-04-24 岡谷電機産業株式会社 サ−ジ吸収素子の気密封止方法
TW358195B (en) * 1997-01-16 1999-05-11 Sony Co Ltd Manufacturing method of image display
FR2766964B1 (fr) * 1997-07-29 1999-10-29 Pixtech Sa Procede d'assemblage sous vide d'un ecran plat de visualisation
US20090164919A1 (en) 2007-12-24 2009-06-25 Cary Lee Bates Generating data for managing encounters in a virtual world environment
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Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032316A (en) * 1975-11-26 1977-06-28 Burroughs Corporation Method of sealing a glass/tubulation to a plate
US4082392A (en) * 1976-04-05 1978-04-04 Golin Jeffrey R Gas discharge lamp preparation process
US4182540A (en) * 1977-12-22 1980-01-08 Beckman Instruments, Inc. Method of sealing gas discharge displays
US4207724A (en) * 1978-05-23 1980-06-17 R. L. Kuss And Company Method of making pulsation bag
US4380855A (en) * 1980-01-18 1983-04-26 University Of Rochester Method for filling hollow shells with gas for use as laser fusion targets
EP0055416A3 (en) * 1980-12-26 1983-03-30 Tokyo Shibaura Denki Kabushiki Kaisha Method of sealing a tube using a laser beam
EP0055416A2 (en) * 1980-12-26 1982-07-07 Kabushiki Kaisha Toshiba Method of sealing a tube using a laser beam
US4921022A (en) * 1988-01-11 1990-05-01 Peter Lisec Apparatus for filling insulating glass with a special gas
US5657607A (en) * 1989-08-23 1997-08-19 University Of Sydney Thermally insulating glass panel and method of construction
EP0451362A2 (en) * 1990-04-11 1991-10-16 Mitsubishi Denki Kabushiki Kaisha Plasma display panel and a process for producing the same
EP0451362A3 (en) * 1990-04-11 1992-03-18 Mitsubishi Denki Kabushiki Kaisha Plasma display panel and a process for producing the same
US5207607A (en) * 1990-04-11 1993-05-04 Mitsubishi Denki Kabushiki Kaisha Plasma display panel and a process for producing the same
US5664395A (en) * 1992-01-31 1997-09-09 The University Of Sydney Thermally insulating glass panels
US5902652A (en) * 1993-06-30 1999-05-11 University Of Sydney Methods of construction of evacuated glazing
US6103324A (en) * 1993-06-30 2000-08-15 The University Of Sydney Methods of construction of evacuated glazing
US5952775A (en) * 1994-06-09 1999-09-14 Canon Kabushiki Kaisha Image-forming apparatus having vent tubes
US6867537B2 (en) 1994-06-09 2005-03-15 Canon Kabushiki Kaisha Image-forming apparatus having vent tube and getter
KR100379575B1 (ko) * 1996-04-24 2003-06-19 오리온전기 주식회사 평판표시소자의 밀봉구
US5897927A (en) * 1997-06-30 1999-04-27 Industrial Technology Research Institute Seal for vacuum devices and methods for making same
US6467225B1 (en) * 1998-10-05 2002-10-22 Nippon Sheet Glass Co., Ltd. Glass sheet and glass window for vehicles
US6531818B1 (en) * 1999-07-13 2003-03-11 Thomson Licensing S. A. Pumping tube for pumping and filling flat display panel
US6591635B1 (en) * 2000-04-24 2003-07-15 Fujitsu Hitachi Plasma Display Limited Method of bonding tubulation tubing of display panel
US7205037B2 (en) 2000-04-24 2007-04-17 Fujitsu Hitachi Plasma Display Limited Tubulation tubing of display panel
US6998161B2 (en) 2000-04-24 2006-02-14 Fujitsu Hitachi Plasma Display Limited Tubulation tubing of display panel
US20060008607A1 (en) * 2000-04-24 2006-01-12 Fijitsu Hitachi Plasma Display Limited Tubulation tubing of display panel
US7473152B1 (en) * 2000-07-31 2009-01-06 Canon Kabushiki Kaisha Sealing of flat-panel device
US6692600B2 (en) 2001-09-14 2004-02-17 Guardian Industries Corp. VIG evacuation with plasma excitation
US20030067366A1 (en) * 2001-10-10 2003-04-10 Alain Normanni Tube for pumping a space between two tiles, especially for a plasma display
US6899139B2 (en) * 2001-10-10 2005-05-31 Thomson Licensing S.A. Tube for pumping a space between two tiles, especially for a plasma display
US20060025033A1 (en) * 2002-06-07 2006-02-02 Lothar Hitzschke Producing method for a gas discharge device
CN1675736B (zh) * 2002-06-07 2010-10-13 电灯专利信托有限公司 气体放电装置的制造方法
WO2003105178A3 (de) * 2002-06-07 2005-03-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Herstellungsverfahren für gasentladungsvorrichtung
US7261610B2 (en) 2002-06-07 2007-08-28 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Method for producing a gas discharge vessel at superatmospheric pressure
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Also Published As

Publication number Publication date
JPS503774A (ja) 1975-01-16
FR2225833B1 (ja) 1977-06-17
GB1408374A (en) 1975-10-01
USB351672I5 (ja) 1975-01-28
FR2225833A1 (ja) 1974-11-08
DE2412021A1 (de) 1974-11-14

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