US3914000A - Method of making tubeless gas panel - Google Patents
Method of making tubeless gas panel Download PDFInfo
- 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
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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)
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 (de) | 1973-04-16 | 1974-02-28 | |
DE2412021A DE2412021A1 (de) | 1973-04-16 | 1974-03-13 | Verfahren zur herstellung von gasentladungsanzeigetafeln |
JP49028693A JPS503774A (de) | 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 (de) | 1975-01-28 |
US3914000A true US3914000A (en) | 1975-10-21 |
Family
ID=23381868
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 (de) |
JP (1) | JPS503774A (de) |
DE (1) | DE2412021A1 (de) |
FR (1) | FR2225833B1 (de) |
GB (1) | GB1408374A (de) |
Cited By (32)
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 (de) * | 1980-12-26 | 1982-07-07 | Kabushiki Kaisha Toshiba | Verfahren zur Abdichtung eines Rohres mit einem Laserstrahl |
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 (de) * | 1990-04-11 | 1991-10-16 | Mitsubishi Denki Kabushiki Kaisha | Plasma-Anzeigetafel und Verfahren zur Herstellung derselben |
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 |
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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 |
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GB279227A (en) * | 1926-09-25 | 1927-10-27 | Emil Bruederlin | A process for evacuating and sealing metal containers and apparatus therefor |
US2262176A (en) * | 1938-10-07 | 1941-11-11 | Gen Electric | Exhausting and sealing method and apparatus |
FR1080192A (fr) * | 1953-06-05 | 1954-12-07 | Pittsburgh Plate Glass Co | Perfectionnements aux moyens d'obturation des petits orifices d'évent des vitrages doubles |
US2894294A (en) * | 1955-04-08 | 1959-07-14 | Pittsburgh Plate Glass Co | Pore closure structure for multiple glazed unit |
US2988852A (en) * | 1957-12-11 | 1961-06-20 | Owens Illinois Glass Co | Method of thermally sealing hollow glass articles at minimal temperatures |
CA739687A (en) * | 1966-08-02 | Owens-Illinois | Vent seal for hollow glass articles and method of forming same | |
US3778127A (en) * | 1971-12-30 | 1973-12-11 | Ibm | Sealing technique for gas panel |
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- 1973-04-16 US US351672A patent/US3914000A/en not_active Expired - Lifetime
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- 1974-02-12 GB GB625874A patent/GB1408374A/en not_active Expired
- 1974-02-28 FR FR7407864A patent/FR2225833B1/fr not_active Expired
- 1974-03-13 DE DE2412021A patent/DE2412021A1/de active Pending
- 1974-03-14 JP JP49028693A patent/JPS503774A/ja active Pending
Patent Citations (7)
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CA739687A (en) * | 1966-08-02 | Owens-Illinois | Vent seal for hollow glass articles and method of forming same | |
GB279227A (en) * | 1926-09-25 | 1927-10-27 | Emil Bruederlin | A process for evacuating and sealing metal containers and apparatus therefor |
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FR1080192A (fr) * | 1953-06-05 | 1954-12-07 | Pittsburgh Plate Glass Co | Perfectionnements aux moyens d'obturation des petits orifices d'évent des vitrages doubles |
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Cited By (56)
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 (de) * | 1980-12-26 | 1982-07-07 | Kabushiki Kaisha Toshiba | Verfahren zur Abdichtung eines Rohres mit einem Laserstrahl |
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 (de) * | 1990-04-11 | 1991-10-16 | Mitsubishi Denki Kabushiki Kaisha | Plasma-Anzeigetafel und Verfahren zur Herstellung derselben |
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 |
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Also Published As
Publication number | Publication date |
---|---|
DE2412021A1 (de) | 1974-11-14 |
GB1408374A (en) | 1975-10-01 |
FR2225833B1 (de) | 1977-06-17 |
FR2225833A1 (de) | 1974-11-08 |
USB351672I5 (de) | 1975-01-28 |
JPS503774A (de) | 1975-01-16 |
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