US3614509A - Large area plasma panel display device - Google Patents

Large area plasma panel display device Download PDF

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Publication number
US3614509A
US3614509A US822623A US3614509DA US3614509A US 3614509 A US3614509 A US 3614509A US 822623 A US822623 A US 822623A US 3614509D A US3614509D A US 3614509DA US 3614509 A US3614509 A US 3614509A
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modular elements
gas cells
elements
electrode
conductive strips
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Expired - Lifetime
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US822623A
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English (en)
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Robert H Willson
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
    • H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space

Definitions

  • This invention is directed to a large area panel display device whereby a high-density plasma display is provided from a number of modular building blocks to minimize the gaps between modules'to provide a high-density display device.
  • ATTORNEY m r y M v may N d R 4 Y B LARGE AREA PLASMA PANEL DISPLAY DEVlGE BACKGROUND OF THE INVENTION
  • This invention is directed to an inexpensive, highbrightness, flat, display device utilizing gas discharges as the source of light.
  • This type of device has been referred to as the plasma display.
  • the conventional plasma display consists of layer-type structure made up of three thin plates in which there are two outer plates and an apertured inner plate. Transparent conductive electrodes are provided on the outside surface of these outer plates to provide a cross grid arrangement. Each aperture or opening in the inner plate defines a display element.
  • the apertures are filled with a suitable gas mixture and the individual display elements can be ignited by applying a coincident voltage of appropriate magnitude to the selected crossed grid conductive members on the outer surface of the outer plates.
  • the desired individual gas cells or display elements may be excited to form a display corresponding to the excited cells.
  • image may be displayed in a well known manner.
  • a further improvement to the above-described display device is set forth in U.S. Pat. application Ser. No. 773,468 filed Nov. 5, 1968 by H. Goldie et al. and assigned to the same assignee as this invention.
  • the above-mentioned copending application describes a modular construction for a display device. This copending application is directed to the concept of providing a large area display by positioning a plurality of evacuated modules between two electrode plates. The seal region of each module results in a structure with loss of resolution between modules.
  • This invention is directed to a large area display device consisting of a plurality of modular elements and assembled in such a manner to provide a large area high resolution display without loss of resolution between modules. This is accomplished by providing a plurality of modular perforated panel elements arranged side-by-side to form a large area display.
  • the perforated module elements are sandwiched between two electrode panel members coextensive with the assembled perforated elements.
  • the electrode panel members have electrodes provided thereon and insulating material between the perforated elements and the electrodes on the electrode panels.
  • the insulating material may be modular form, a continuous sheet of similar area as the electrode panel members or a dielectric coating provided over the electrode surfaced electrode panel members to provide the necessary dielectric between the electrodes and the gas confined in apertures in the perforated elements.
  • the panel display is sealed off at the outer edges of the electrode panel members.
  • the panel is evacuated and then provided with a suitable gas mixture prior to sealing to provide the completed display panel.
  • FIG. 1 is a perspective view of a large area panel display device with a portion enlarged and incorporating teachings of this invention
  • FIG. 2 is a front view of a display panel of the type shown in F l0. 1 with associated circuitry for control of the panel;
  • FIG. 3 illustrates a modified embodiment for providing electrodes on the panel which may be incorporated in FIG. 1;
  • FIG. 4 illustrates a modified embodiment for providing a dielectric coating between the electrodes and cells of FIG. I.
  • FIGS. 1 and 2 there is illustrated a large area panel display 10.
  • the specific embodiment shown comprises nine module perforated elements 14. It is obvious that any number of modules 14 arranged side-by-side may be used depending on the size of the display desired.
  • Each of the modules 14 include a large number of display elements 19 each formed by the excitation of the gas confined within an aperture 20. The number of display elements 19 is dependent upon the resolution desired from the display device. In the specific device, 400 display elements 19 are provided in each module 14.
  • a typical module 14 may be a square of about l0 inches X 10 inches.
  • the panel 10 provides three modules in each row and column.
  • Each module 14 contains a plurality of rows and columns of display elements 19 which are aligned with rows and columns of adjacent modules.
  • the panel 10 includes two outer electrode panels 22 and 24 of a suitable insulating material and of which at least one is transmissive to radiations from within the display elements 19.
  • a suitable material is glass.
  • the electrode panels 22 and 24 are provided with a plurality of spaced parallel electrically conducting strips 26 and 28 on the inner surfaces.
  • the electrode panel 22 is provided with a plurality of spaced parallel electrical conducting strips 26 which may be referred to as the X conductors.
  • the other electrode panel 24 has a plurality of spaced parallel electrically conducting strips 28 which may be referred to as the Y- conductors.
  • These electrically conducting strips or coatings 26 and 28 may be of any suitable material such as gold and may be evaporated or applied in any desired manner to provide electrically conducting leads. At least one of the sets of strips 26 or 28 must be transmissive to light generated in the cell 19. This may be accomplished by providing a conductive strip 26 or 28 of a material such as stannic oxide which would be transmissive to the radiation from the display elements 19. It is also possible to make the back electrode reflective to increase the light output. One difficulty with such an arrangement is that such a layer thin enough to provide optical transmission may have a high resistance and with long strips the total current in each of the conducting strips 26 and 28 may be so high that regular current flow will cause heating and may destroy the conductive strips.
  • One possible solution to this problem is to provide a relatively thick nontransmissive-type coating such as copper in which windows are provided over the display elements 19.
  • the windows may be provided with a coating of a suitable light transmissive material and will still not destroy the current carrying properties of the main strip.
  • Another possible modification is to provide a continuous thick conductive strip located between a row or column of display elements 19 and provide electrically conductive thin tabs of light transmissive material from' each display element 19 and associated conducting strip. Such an arrangement is shown in FIG. 3 in which a conducting strip 26 is illustrated with light transmissive tabs 27 provided in electrical connection with the strip 26 and over a display element 19.
  • the Y conductive strips 28 are brought out to the edge of the panel 10 and are connected to a suitable switching network 30.
  • the X conductive strips 26 are brought out of the panel display 10 and connected to a suitable switching network 32.
  • An insulating sheet 27 of a suitable material such as SiO, having a thickness of about l0 inch is provided between the electrode panel 22 and the assembly of modular elements 14.
  • a similar sheet 29 is provided between the electrode panel 24 and the assembly of elements 14.
  • the rectangular modular elements 14 may have a side dimension of about 10 inches and a thickness of 20x10 inch with a tolerance of :00005.
  • the display elements 19 or openings 20 in the modular elements 14 may be placed side-by-side without loss of resolution between the modular elements 14.
  • the modular elements 14 are positioned side-by-side as illustratedin FIG. I and the electrode panels 22 and 24 are then brought in to hold this plurality of modular members 14 together with the insulating spacers 27 and 29 provided between the electrode strips 26 and 28 and modular elements 14.
  • a tubulation 31 may be provided for exhausting the plurality of openings 20 within the modular elements 14 and then a suitable gas introduced at a suitable pressure and the tubulation 31 tipped off.
  • a suitable gas mixture is that of nitrogen and neon at a pressure of about 200 torr. It may be necessary to provide communication passages between the cell openings to permit the evacuation and refilling with the suitable gas mixture. It may also be possible in some cases to dispense with the aperture members M. It is also possible to fabricate the entire display within a suitable atmosphere'so as to avoid the necessity of exhausting and filling with gas. The entire panel display would be sealed within the suitable gas mixture atmosphere.
  • FIG. 4 there is illustrated a modification of the structure shown in FIG. 11 in which a suitable dielectric coating 43 is provided over the electrode face of the electrode panel 22 so as to dispense with necessity of the insulating spacer members 27 and 29.
  • a suitable dielectric such as SiO which is also transparent to radiation is deposited over the electrodes 26 and would insulate the electrodes 26 from the cells 19. Since the distance between the electrodes 26 and the cells 19 is now considerably less than the previous structure, the series impedance is much less. Thus the total current that can flow during the formative stage of the discharge is greater, which in turn allows for a more complete charging of the walls of cells 19 and consequently larger voltage margin.
  • the layer 43 is much more uniform than a thin substrate of insulating material such as glass.
  • the thickness may be about one mil.
  • the cells are much more uniform in their characteristics.
  • the dependence on the physical geometry is greatly reduced and is insensitive to variation in cell size.
  • a signal-sustaining voltage source 50 is connected capacitively to the conducting strips 26 and 28 and supplies the sustaining voltage for the whole display screen.
  • the voltage source 50 may have a frequency of several hundred kilohertz and a voltage of several hundred volts.
  • the discharge elements 19 which are initially on are maintained in the on state by the sustaining voltage from source 50 while elements 19 which are initially off remain off.
  • the elements 19 are turned on or turned off by a firing input from a source 33 which provides appropriate voltages greater than the sustaining voltage to the selected X and Y electrodes through the switching networks 30 and 32.
  • a display panel comprising a plurality of individually controllable display elements, said panel comprised of two outer electrode panels provided with electrically conductive means on the inner surfaces of said panels to provide means for exciting selected display elements, said display-emitting light due to a gas discharge, said electrically conductive means on at least one of said panels comprised of a first portion of a lowresistance-type coating intermediate said elements and a second portion of a higher resistance than said first portion and located over said display elements and transmissive to radiation from said display elements.
  • a display panel comprising a plurality of display element, each of said display elements comprised of a cell filled with gas, said panel including two outer electrode panels, said electrode panels of insulating material provided with electrically conductive means thereon in operating relationship with said gas cells, a plurality of perforated modular elements of insulating material positioned between said outer electrode panels and arranged side-by-side, the walls of the openings in said perforated modular elements forming a portion of the walls of said cell, insulating means positioned between the electrodes on said electrode panels and said perforated modular elements with said gas cells defined by the walls of the opening in said perforated modular elements and said insulating means closing off said openings, the outer periphery of said electrode panels sealed to confine the gas within the region defined by said gas cells, said perforated modular elements are arranged side-by-side to provide a plurality of rows and columns of modular elements, each of said modular elements including a plurality of rows and columns of gas cells and aligned with rows and columns of gas cells in adjacent modular elements without discontinu
  • a display panel comprising a plurality of display elements, each of said display elements comprised of a cell filled with gas, said panel including two outer electrode panels, said electrode panels of insulating material provided with electrically conductive means thereon in operating relationship with said gas cells, a plurality of perforated modular elements of insulating material positioned between said outer electrode panels and arranged side-by-side, the walls of the openings in said perforated modular elements forming a portion of the walls of said cell, insulating means positioned between the electrodes on said electrode panels and said perforated modular elements with said gas cells defined by the walls of the opening in said perforated modular elements and said insulating means closing off said openings, the outer periphery of said electrode panels sealed to confine the gas within the region defined by said gas cells, said perforated modular elements are arranged side-by-side to provide a plurality or rows and columns of modular elements, each of said modular elements including a plurality of rows and columns of gas cells and aligned with rows and columns of gas cells in adjacent modular elements without discontinu
  • a display panel comprising a plurality of display elements, each of said display elements comprised of a cell filled with gas, said panel including two outer electrode panels, said electrode panels of insulating material provided with electrically conductive means thereon in operating relationship with said gas cells, a plurality of perforated modular elements of insulating material positioned between said outer electrode panels and arranged side-by-side, the walls of the openings in said perforated modular elements forming a portion of the walls of said cell, insulating means positioned between the electrodes on said electrode panels and said perforated modular elements with said gas cells defined by the walls of the opening in said perforated modular elements and said insulating means closing off said openings, the outer periphery of said electrode panels sealed to confine the gas within the region defined by said gas cells, said perforated modular elements are arranged side-by-side to provide a plurality of rows and columns of modular elements, each of said modular elements including a plurality of rows and columns of gas cells and aligned with rows and columns of gas cells in adjacent modular elements without discontinu

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
US822623A 1969-05-07 1969-05-07 Large area plasma panel display device Expired - Lifetime US3614509A (en)

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US82262369A 1969-05-07 1969-05-07

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716742A (en) * 1970-03-03 1973-02-13 Fujitsu Ltd Display device utilization gas discharge
US3778126A (en) * 1971-12-30 1973-12-11 Ibm Gas display panel without exhaust tube structure
US3778127A (en) * 1971-12-30 1973-12-11 Ibm Sealing technique for gas panel
US3787106A (en) * 1971-11-09 1974-01-22 Owens Illinois Inc Monolithically structured gas discharge device and method of fabrication
US3789470A (en) * 1968-06-12 1974-02-05 Fujitsu Ltd Method of manufacture of display device utilizing gas discharge
US3852607A (en) * 1973-09-21 1974-12-03 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US3919577A (en) * 1973-09-21 1975-11-11 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US4692665A (en) * 1985-07-05 1987-09-08 Nec Corporation Driving method for driving plasma display with improved power consumption and driving device for performing the same method
US4731560A (en) * 1970-08-06 1988-03-15 Owens-Illinois Television Products, Inc. Multiple gaseous discharge display/memory panel having improved operating life
US4791417A (en) * 1983-03-01 1988-12-13 Tadeusz Bobak Display device
US4794308A (en) * 1970-08-06 1988-12-27 Owens-Illinois Television Products Inc. Multiple gaseous discharge display/memory panel having improved operating life
US5383040A (en) * 1991-11-27 1995-01-17 Samsung Electron Devices Co., Ltd. Plasma addressed liquid crystal display with center substrate divided into separate sections
US5655940A (en) * 1994-09-28 1997-08-12 Texas Instruments Incorporated Creation of a large field emission device display through the use of multiple cathodes and a seamless anode

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013182A (en) * 1960-05-24 1961-12-12 Singer Inc H R B Electronic display panel
US3351937A (en) * 1965-08-06 1967-11-07 Solartron Electronic Group Data-display apparatus
US3447043A (en) * 1966-12-29 1969-05-27 Itt Tunnel cathode in matrix form with integral storage feature
US3497751A (en) * 1967-09-25 1970-02-24 Burroughs Corp Transparent electrode and device using the same
US3499167A (en) * 1967-11-24 1970-03-03 Owens Illinois Inc Gas discharge display memory device and method of operating
US3509407A (en) * 1967-09-15 1970-04-28 Burroughs Corp Display panel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013182A (en) * 1960-05-24 1961-12-12 Singer Inc H R B Electronic display panel
US3351937A (en) * 1965-08-06 1967-11-07 Solartron Electronic Group Data-display apparatus
US3447043A (en) * 1966-12-29 1969-05-27 Itt Tunnel cathode in matrix form with integral storage feature
US3509407A (en) * 1967-09-15 1970-04-28 Burroughs Corp Display panel
US3497751A (en) * 1967-09-25 1970-02-24 Burroughs Corp Transparent electrode and device using the same
US3499167A (en) * 1967-11-24 1970-03-03 Owens Illinois Inc Gas discharge display memory device and method of operating

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789470A (en) * 1968-06-12 1974-02-05 Fujitsu Ltd Method of manufacture of display device utilizing gas discharge
US3716742A (en) * 1970-03-03 1973-02-13 Fujitsu Ltd Display device utilization gas discharge
US4731560A (en) * 1970-08-06 1988-03-15 Owens-Illinois Television Products, Inc. Multiple gaseous discharge display/memory panel having improved operating life
US4794308A (en) * 1970-08-06 1988-12-27 Owens-Illinois Television Products Inc. Multiple gaseous discharge display/memory panel having improved operating life
US3787106A (en) * 1971-11-09 1974-01-22 Owens Illinois Inc Monolithically structured gas discharge device and method of fabrication
US3778126A (en) * 1971-12-30 1973-12-11 Ibm Gas display panel without exhaust tube structure
US3778127A (en) * 1971-12-30 1973-12-11 Ibm Sealing technique for gas panel
US3919577A (en) * 1973-09-21 1975-11-11 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US3852607A (en) * 1973-09-21 1974-12-03 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US4791417A (en) * 1983-03-01 1988-12-13 Tadeusz Bobak Display device
US4692665A (en) * 1985-07-05 1987-09-08 Nec Corporation Driving method for driving plasma display with improved power consumption and driving device for performing the same method
US5383040A (en) * 1991-11-27 1995-01-17 Samsung Electron Devices Co., Ltd. Plasma addressed liquid crystal display with center substrate divided into separate sections
US5655940A (en) * 1994-09-28 1997-08-12 Texas Instruments Incorporated Creation of a large field emission device display through the use of multiple cathodes and a seamless anode
US6252569B1 (en) 1994-09-28 2001-06-26 Texas Instruments Incorporated Large field emission display (FED) made up of independently operated display sections integrated behind one common continuous large anode which displays one large image or multiple independent images

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