|Publication number||US3646384 A|
|Publication date||Feb 29, 1972|
|Filing date||Jun 9, 1970|
|Priority date||Jun 9, 1970|
|Also published as||DE2122607A1|
|Publication number||US 3646384 A, US 3646384A, US-A-3646384, US3646384 A, US3646384A|
|Inventors||Frank M Lay|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (86), Classifications (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Lay [ 51 Feb. 29, 1972  ONE-SIDED PLASMA DISPLAY PANEL 1 72] Inventor: Frank M. Lay, Kingston. N.Y.
 Arstsignec: lntemattamal Business Machines Corporation, Armonk, NY.
 Filed: June 9, 1970 ] Appl. No.: 44,845
 US. Cl. ..3l3/l09.5, 313/220, 315/169 R, 340/343  Int. Cl ..1-l0lj 61/30  Field of Search ..313/108 B, 109.5, 220; 315/169 R, 169 TV; 340/166 EL, 343, 344
 References Cited UNITED STATES PATENTS 2,972,707 2/1961 Wood ..315/169X 3,499,l67 3/1970 Bakeretal .l ..3l3/220X 562,429 6/1896 Skinner ..340/343 Primary Examiner-Raymond F. Hossfeld Attorney-Sughrue, Rothwell, Mion, Zinn & Macpeak ABSTRACT A thin glass sheet carries seats of spaced, parallel electrodes on opposite surfaces thereof and a gaseous atmosphere overlies one surface. Applying an alternating current voltage exceeding a critical value across selected electrodes of each set causes a gas discharge to take place on the surface carrying the gas at the area of selected electrode crossing with localized visible light output.
6 Claims, 2 Drawing Figures PATENTED I972 3,646,384
INVENTOR FRANK M. LAY
ag, il-Kane! M ATTORNEYS ONE-SIDED PLASMA DISPLAY PANEL BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to planar display panels and more particularly to a simplified, low-cost display panel which eliminates the need for uniformity in spacing or accurate registration between panel components.
2. Description of the Prior Art Relatively thin, planar display panels employing a localized plasma effect have been manufactured in the past, in two forms. In one form, glass plates approximately 54; inch in thickness are separated by a gas filled gap about mils in width and the gap is maintained by thin glass spacers. The inner faces of the plates carry horizontal and vertical sets of transparent electrodes covered by a thin glass insulating layer. The intersections of these electrodes establish the spots that form the displayed pattern. Alternatively, instead of using two spaced glass plates, a three layer glass sandwich may be employed with holes in the middle layer through which the discharge occurs, although, in all other respects, this arrangement is similar to the first described plasma readout panels. The three layer panel involves inherently a registration problem since the perforated center plate or middle layer must have the perforations accurately aligned with the points of intersection between the transparent electrodes carried by the outer plates. With the two layer panel, there is inherently a uniformity problem since it is hard to maintain a uniform gas chamber of the order of several mils over the complete surface ofa large panel.
SUMMARY OF THE INVENTION The present invention provides a practical solution involving a single layer approach which solves both the registration and uniformity problems. The present invention is directed to a flat panel constructed from a single thin sheet of insulated material with sets of spaced parallel electrodes positioned on opposite sides of the insulator sheet with one set orthogonal to the other. The invention makes use of a gaseous atmosphere applied to one of the surfaces and by raising an alternating current voltage above a predetermined value, a localized gas discharge takes place on the surface subjected to the gas, with localized visible light output.
Preferably a neon atmosphere at 200 torr. is maintained on one side of the glass sheet, confined by a clear glass cover with the matrix electrodes constituting three lines per inch. A 500 volt, peak-to-peak firing voltage is selectively applied to given row and column electrodes to effect bistable action. A thin insulation layer may overlie the electrodes exposed to the gases.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a prior art three layer plasma display panel;
FIG. 2 is a perspective view, partially broken away, of the preferred embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT Prior to referring to FIG. 2 illustrating one embodiment of the present invention, reference to FIG. 1 illustrates a prior art plasma display panel 1, constituting a matrix display formed as a sandwich of three thin plates 2, 3, and 4. The center plate 3 is honeycombed with either etched or ultrasonically drilled holes 5. Transparent, thin film electrodes 6 and 7 are deposited on the outer surfaces of the two outer plates 2 and 4. The panel is evacuated and the array is filled with a mixture of neon-nitrogen gas or the like. The application of coincident voltages of appropriate magnitude to selected crossed grids, that is, electrodes 6 and 7, allow selected display elements to be ignited. Voltages applied to the crossed electrodes are coupled capacitively into the cell so that only AC excitation voltages are required. Display is seen through one set of highly transparent electrodes either 6 or 7, and the gas discharge is confined totally to the cylindrical cavity formed by the three glass sheets 2, 3, and 4. However, since the display panels can be manufactured such that approximately 18,000 tiny spots may be provided within a 4 inch square area, registration of the three plates is extremely critical. In addition, the manufacture of such display panels has been relatively expensive.
Referring to FIG. 2, the gas discharge display panel 10 of the present invention comprises in the form shown, a rectangular support or base 12 of some thickness which may constitute a block of electrical insulator material. Block 12 constitutes the physical support means or substrate for the panel including, an outer clear glass envelope 14 which acts in this case as a cover for base 12 and is hermetically sealed thereto, preferably about edge 16. While the envelope 14 may comprise clear glass, it is obvious that it may be formed of some other insulator, being at least translucent, so as to allow observation of a localized area of visible light output from the display panel 10.
The principal component of the panel comprises a thin electrical insulator sheet 18 which may also be of glass, ceramic, etc. A first set of metal electrodes 20 are preferably first applied to the top of the substrate 12 by electrodeposition or any other conventional process, the electrodes 20 being spaced from each other and parallel. In the illustrated embodiment there are approximately three lines per inch. The thin insula tor l8 (soft glass, hard glass, ceramic) is applied on top of the substrate 12 overlying conductors 20 of a thickness typically in the range of a micron to several mils. On the upper surface 22 of the thin insulator sheet 18 there is formed a second set of electrodes 24 which are similarly formed, consisting of thin strips of metal which lie preferably orthogonal or approximately so to the underlying conductors 20. As such, the upper and lower conductors or electrodes 24 and 20 extend in crossed paths, spaced from each other by the thickness of the insulator sheet 18. The hermetically sealed cover or envelope 14 confines an inert gaseous atmosphere such as neon, indicated at 26, in contact with one surface 22 of the insulator sheet 18 carrying conductive electrodes 24.
The invention involves the phenomena of localized gas discharge which takes place on the surface of the insulator 18 creating localized areas of visible light output as identified at 28, in this case, on either side of the upper electrode 24. Alternating current voltage is selectively applied to the electrode by conventional switch means. However, to illustrate in the most simple manner the application of the same, a source of alternating voltage (not shown) is connected to terminals 30 with lead 32 connecting one of the terminals 30 to a selected upper electrode 24 while lead 34 connects the other terminal 30 to a selected underlying or bottom electrode 20. In the area of the intersection of these spaced electrodes, corona discharge occurs on the upper surface 22 of the insulator, that is, that surface which faces the inert gas atmosphere 26.
The crossed but spaced electrodes define individual gaseous display cells and, in the illustrated embodiment, a matrix constituting three lines per inch has been successfully fired in a neon atmosphere of 200 torr. With the application of an alternating current firing voltage of about 500 volts (peak-topeak), the device shown is bistable in a neon atmosphere of :10 percent nitrogen (at torr.). The upper set of electrodes 24 which are normally exposed to the inert gaseous atmosphere, may be protected by a thin layer 36 of electrical insulation material which has the effect of slowing down the sputtering process and increases the memory margin.
What is claimed is:
1. A gas discharge display panel comprising: an insulator substrate, a first set of spaced parallel electrodes on one surface of said substrate, a glass sheet overlying said first set of electrodes, a second set of spaced electrodes carried on the outer surface of said glass sheet orthogonally to said first set, a clear glass envelope overlying one surface of said sheet carrying said second electrode set and spaced therefrom, a confined neon atmosphere within the space between the one surface and said clear glass envelope, and means for supplying an alternating current voltage of sufficient magnitude across selected electrodes of each set to cause a discharge on the surface of said glass sheet facing the gaseous atmosphere with calized visible light output in the crossing area of selected electrodes.
2. A display panel comprising:
an electrical insulator in the form of a thin sheet, means for maintaining an inert ionizable gas atmosphere on one side of said sheet, at least one conductor formed on said one side of said sheet, at least one conductor formed on the side of said sheet opposite to said one side, said two conductors partially overlapping to form a crossover point, and means connected to said two conductors for applying a potential difference across said crossover point to cause a gasv discharge in said inert ionizable gas atmosphere in the vicinity of the crossover point.
3. The display panel of claim 2 further including a first plurality of parallel conductors on said one side of said sheet and a second plurality of parallel conductors on said opposite side, said second plurality of conductors being orthogonal to said first plurality of conductors, and means coupled to pairs of electrical conductors comprising one conductor of said first plurality and one conductor of said second plurality for selectively applying an alternating potential difference at the crosspoint of said conductor pairs.
4. The display panel as claimed in claim 3 wherein said thin insulator sheet is supported by an electrical insulator block which underlies the same and said inert gaseous atmosphere is confined to the display surface thereof by an overlying glass envelope hermetically sealed to said block.
5. The display panel of claim 3 further including an insulation layer overlying and in contact with said first plurality of conductors.
6. In a gas discharge display device wherein a potential difference applied at selective locations across an ionizable gas atmosphere retained in a display panel causes selective discharges along with the generation of positive and negative charges tending to counteract the potential difference and extinguish the discharge, subsequent reversals of the potential difference causing successive pulsating discharges at the selected locations, the improvement comprising:
a display panel including a dielectric sheet, one surface of which is in contact with said ionizable gas atmosphere;
a first plurality of conductors spaced along said one surface;
a second plurality of conductors spaced along a second surface of said dielectric sheet parallel to said first surface, and remote from said gas atmosphere, said second plurality of conductors at least partially overlapping said first plurality of conductors to form a plurality of crossover points; and
means coupled to said first and second pluralities of conductors for selectively applying the potential difference across selected crosspoints to generate a discharge in the gas atmosphere in the vicinity of the selected crosspoints.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US562429 *||Jun 23, 1896||Xx electrical adv advertising apparatus|
|US2972707 *||Oct 18, 1954||Feb 21, 1961||Electro Voice||Image reproducing device|
|US3499167 *||Nov 24, 1967||Mar 3, 1970||Owens Illinois Inc||Gas discharge display memory device and method of operating|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3753609 *||Dec 8, 1971||Aug 21, 1973||Olivetti & Co Spa||Liquid crystal display|
|US3787106 *||Nov 9, 1971||Jan 22, 1974||Owens Illinois Inc||Monolithically structured gas discharge device and method of fabrication|
|US3811061 *||Oct 13, 1972||May 14, 1974||Fujitsu Ltd||Plane surface discharge plasma display panel|
|US3860846 *||Feb 22, 1974||Jan 14, 1975||Control Data Corp||Planar plasma discharge display panel|
|US3864593 *||May 23, 1973||Feb 4, 1975||Ise Electronics Corp||Flat fluorescent letter display tubes|
|US3873169 *||May 31, 1973||Mar 25, 1975||Hitachi Ltd||Multiple digit display device and method of manufacturing same|
|US3873171 *||May 31, 1973||Mar 25, 1975||Hitachi Ltd||Multiple-digit display device and method of manufacturing the same|
|US3898515 *||Mar 6, 1973||Aug 5, 1975||Fujitsu Ltd||Arrangement of electrodes on a display panel utilizing gas discharge|
|US4235001 *||Apr 27, 1978||Nov 25, 1980||Haruhiro Matino||Gas display panel fabrication method|
|US4887003 *||May 10, 1988||Dec 12, 1989||Parker William P||Screen printable luminous panel display device|
|US4956577 *||Aug 24, 1988||Sep 11, 1990||Parker William P||Interactive luminous panel display device|
|US5126632 *||Mar 15, 1991||Jun 30, 1992||Parker William P||Luminous panel display device|
|US5198723 *||Dec 11, 1989||Mar 30, 1993||Parker William P||Luminous panel display device|
|US5469021 *||Jun 2, 1993||Nov 21, 1995||Btl Fellows Company, Llc||Gas discharge flat-panel display and method for making the same|
|US5587624 *||Feb 14, 1995||Dec 24, 1996||Pioneer Electronic Corporation||Plasma display panel|
|US5634836 *||Jun 7, 1995||Jun 3, 1997||Spectron Corporation Of America, L.L.C.||Method of making a gas discharge flat-panel display|
|US5654727 *||Jun 7, 1995||Aug 5, 1997||Spectron Corporation Of America, L.L.C.||Gas discharge flat-panel display|
|US5954560 *||Dec 12, 1997||Sep 21, 1999||Spectron Corporation Of America, L.L.C.||Method for making a gas discharge flat-panel display|
|US6545422||Oct 27, 2000||Apr 8, 2003||Science Applications International Corporation||Socket for use with a micro-component in a light-emitting panel|
|US6570335||Oct 27, 2000||May 27, 2003||Science Applications International Corporation||Method and system for energizing a micro-component in a light-emitting panel|
|US6612889||Oct 27, 2000||Sep 2, 2003||Science Applications International Corporation||Method for making a light-emitting panel|
|US6620012||Oct 27, 2000||Sep 16, 2003||Science Applications International Corporation||Method for testing a light-emitting panel and the components therein|
|US6646388||Dec 13, 2002||Nov 11, 2003||Science Applications International Corporation||Socket for use with a micro-component in a light-emitting panel|
|US6762566||Oct 27, 2000||Jul 13, 2004||Science Applications International Corporation||Micro-component for use in a light-emitting panel|
|US6764367||Aug 9, 2002||Jul 20, 2004||Science Applications International Corporation||Liquid manufacturing processes for panel layer fabrication|
|US6796867||Aug 9, 2002||Sep 28, 2004||Science Applications International Corporation||Use of printing and other technology for micro-component placement|
|US6801001||Aug 9, 2002||Oct 5, 2004||Science Applications International Corporation||Method and apparatus for addressing micro-components in a plasma display panel|
|US6822626||Aug 9, 2002||Nov 23, 2004||Science Applications International Corporation||Design, fabrication, testing, and conditioning of micro-components for use in a light-emitting panel|
|US6864631||Oct 15, 2002||Mar 8, 2005||Imaging Systems Technology||Gas discharge display device|
|US6902456||Aug 20, 2003||Jun 7, 2005||Science Applications International Corporation||Socket for use with a micro-component in a light-emitting panel|
|US6935913||Aug 9, 2002||Aug 30, 2005||Science Applications International Corporation||Method for on-line testing of a light emitting panel|
|US6975068||Nov 26, 2002||Dec 13, 2005||Science Applications International Corporation||Light-emitting panel and a method for making|
|US7005793||May 24, 2005||Feb 28, 2006||Science Applications International Corporation||Socket for use with a micro-component in a light-emitting panel|
|US7025648||Mar 2, 2004||Apr 11, 2006||Science Applications International Corporation||Liquid manufacturing processes for panel layer fabrication|
|US7122961||Nov 29, 2005||Oct 17, 2006||Imaging Systems Technology||Positive column tubular PDP|
|US7125305||Jul 8, 2003||Oct 24, 2006||Science Applications International Corporation||Light-emitting panel and a method for making|
|US7137857||Apr 17, 2003||Nov 21, 2006||Science Applications International Corporation||Method for manufacturing a light-emitting panel|
|US7140941||Feb 3, 2006||Nov 28, 2006||Science Applications International Corporation||Liquid manufacturing processes for panel layer fabrication|
|US7157854||May 20, 2003||Jan 2, 2007||Imaging Systems Technology||Tubular PDP|
|US7164394||Mar 21, 2002||Jan 16, 2007||Hitachi, Ltd.||Plasma display apparatus|
|US7176628||May 19, 2005||Feb 13, 2007||Imaging Systems Technology||Positive column tubular PDP|
|US7288014||Jan 14, 2004||Oct 30, 2007||Science Applications International Corporation||Design, fabrication, testing, and conditioning of micro-components for use in a light-emitting panel|
|US7405516||Apr 18, 2005||Jul 29, 2008||Imaging Systems Technology||Plasma-shell PDP with organic luminescent substance|
|US7535175||Feb 2, 2007||May 19, 2009||Imaging Systems Technology||Electrode configurations for plasma-dome PDP|
|US7604523||Jun 10, 2005||Oct 20, 2009||Imaging Systems Technology||Plasma-shell PDP|
|US7622866||Feb 2, 2006||Nov 24, 2009||Imaging Systems Technology||Plasma-dome PDP|
|US7628666||Feb 3, 2006||Dec 8, 2009||Imaging Systems Technology||Process for manufacturing plasma-dome PDP|
|US7638943||Jan 30, 2006||Dec 29, 2009||Imaging Systems Technology||Plasma-disc article of manufacture|
|US7679286||Sep 5, 2006||Mar 16, 2010||Imaging Systems Technology||Positive column tubular PDP|
|US7727040||Jan 27, 2006||Jun 1, 2010||Imaging Systems Technology||Process for manufacturing plasma-disc PDP|
|US7730746||Jul 10, 2006||Jun 8, 2010||Imaging Systems Technology||Apparatus to prepare discrete hollow microsphere droplets|
|US7772773||Feb 2, 2007||Aug 10, 2010||Imaging Systems Technology||Electrode configurations for plasma-dome PDP|
|US7772774||Feb 8, 2007||Aug 10, 2010||Imaging Systems Technology||Positive column plasma display tubular device|
|US7789725||Oct 19, 2007||Sep 7, 2010||Science Applications International Corporation||Manufacture of light-emitting panels provided with texturized micro-components|
|US7791037||Mar 9, 2007||Sep 7, 2010||Imaging Systems Technology||Plasma-tube radiation detector|
|US7808178||Feb 6, 2007||Oct 5, 2010||Imaging Systems Technology||Method of manufacture and operation|
|US7833076||Jul 14, 2008||Nov 16, 2010||Imaging Systems Technology, Inc.||Method of fabricating a plasma-shell PDP with combined organic and inorganic luminescent substances|
|US7863815||Jan 19, 2007||Jan 4, 2011||Imaging Systems Technology||Electrode configurations for plasma-disc PDP|
|US7923930||Jul 23, 2007||Apr 12, 2011||Imaging Systems Technology||Plasma-shell device|
|US7932674||Feb 6, 2006||Apr 26, 2011||Imaging Systems Technology||Plasma-dome article of manufacture|
|US7969092||Mar 30, 2007||Jun 28, 2011||Imaging Systems Technology, Inc.||Gas discharge display|
|US7978154||Feb 5, 2007||Jul 12, 2011||Imaging Systems Technology, Inc.||Plasma-shell for pixels of a plasma display|
|US8035303||May 18, 2009||Oct 11, 2011||Imaging Systems Technology||Electrode configurations for gas discharge device|
|US8043137||May 13, 2009||Oct 25, 2011||Science Applications International Corporation||Light-emitting panel and a method for making|
|US8106586||May 31, 2008||Jan 31, 2012||Imaging Systems Technology, Inc.||Plasma discharge display with fluorescent conversion material|
|US8110987||Nov 21, 2008||Feb 7, 2012||Imaging Systems Technology, Inc.||Microshell plasma display|
|US8113898||Oct 8, 2009||Feb 14, 2012||Imaging Systems Technology, Inc.||Gas discharge device with electrical conductive bonding material|
|US8129906||Feb 26, 2009||Mar 6, 2012||Imaging Systems Technology, Inc.||Lumino-shells|
|US8138673||Nov 22, 2008||Mar 20, 2012||Imaging Systems Technology||Radiation shielding|
|US8198811||May 30, 2010||Jun 12, 2012||Imaging Systems Technology||Plasma-Disc PDP|
|US8198812||Jan 6, 2009||Jun 12, 2012||Imaging Systems Technology||Gas filled detector shell with dipole antenna|
|US8246409||Aug 18, 2011||Aug 21, 2012||Science Applications International Corporation||Light-emitting panel and a method for making|
|US8278824||Aug 9, 2010||Oct 2, 2012||Imaging Systems Technology, Inc.||Gas discharge electrode configurations|
|US8299696||Dec 7, 2009||Oct 30, 2012||Imaging Systems Technology||Plasma-shell gas discharge device|
|US8339041||Nov 15, 2010||Dec 25, 2012||Imaging Systems Technology, Inc.||Plasma-shell gas discharge device with combined organic and inorganic luminescent substances|
|US8368303||Feb 13, 2012||Feb 5, 2013||Imaging Systems Technology, Inc.||Gas discharge device with electrical conductive bonding material|
|US8410695||Oct 4, 2010||Apr 2, 2013||Imaging Systems Technology||Gas discharge device incorporating gas-filled plasma-shell and method of manufacturing thereof|
|US8618733||Jan 3, 2011||Dec 31, 2013||Imaging Systems Technology, Inc.||Electrode configurations for plasma-shell gas discharge device|
|US8823260||Jan 23, 2007||Sep 2, 2014||Imaging Systems Technology||Plasma-disc PDP|
|US9013102||Mar 14, 2012||Apr 21, 2015||Imaging Systems Technology, Inc.||Radiation detector with tiled substrates|
|US20040063373 *||Jun 26, 2003||Apr 1, 2004||Johnson Roger Laverne||Method for testing a light-emitting panel and the components therein|
|US20040106349 *||Jul 8, 2003||Jun 3, 2004||Green Albert Myron||Light-emitting panel and a method for making|
|US20050095944 *||Nov 3, 2004||May 5, 2005||Science Applications International Corporation||Design, fabrication, testing, and conditioning of micro-components for use in a light-emitting panel|
|US20050189164 *||Feb 26, 2004||Sep 1, 2005||Chang Chi L.||Speaker enclosure having outer flared tube|
|US20050206317 *||May 24, 2005||Sep 22, 2005||Science Applications International Corp., A California Corporation||Socket for use with a micro-component in a light-emitting panel|
|EP0052376A2 *||Nov 17, 1981||May 26, 1982||Fujitsu Limited||Gas discharge display panel|
|U.S. Classification||313/584, 315/169.1, 315/169.4|
|Cooperative Classification||H01J17/49, H01J17/492|
|European Classification||H01J17/49, H01J17/49D|