US3781600A - Plasma charge transfer device - Google Patents

Plasma charge transfer device Download PDF

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Publication number
US3781600A
US3781600A US00255547A US3781600DA US3781600A US 3781600 A US3781600 A US 3781600A US 00255547 A US00255547 A US 00255547A US 3781600D A US3781600D A US 3781600DA US 3781600 A US3781600 A US 3781600A
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electrode means
plasma
transfer
electrodes
transfer device
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W Coleman
W Kessler
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NCR Voyix Corp
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NCR 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/29—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels using self-shift panels with sequential transfer of the discharges from an input position to a further display position
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/20—Digital stores in which the information is moved stepwise, e.g. shift registers using discharge tubes
    • G11C19/205—Digital stores in which the information is moved stepwise, e.g. shift registers using discharge tubes with gas-filled tubes

Definitions

  • This plasma charge transfer device utilizes: an ionizable gas; an input electrode which can be either directly or capacitively coupled to the gas; capacitively coupling to the gas of oppositely offset transfer electrodes; and the wall voltage which results when charge is transferred as the result of a gaseous discharge occurring between two oppositely offset transfer electrodes the additive effect of this wall voltage to an applied voltage such that a gaseous discharge occurs between two transfer electrodes if charge was transferred to one of the electrodes during a previous discharge whereas a gaseous discharge will not occur with this same applied voltage between any two oppositely offset electrodes which do not have the proper charge trapped on the wall of at least one of the electrode pairs.
  • a gaseous discharge can be successively transferred between subsequent oppositely offset transfer electrode pair, one electrode position at a time, or continuously shifted throughout the entire length of the plasma charge transfer device, or may be held stationary at any oppositely offset transfer electrode pair position within the device.
  • the plasma charge transfer device is used as a shift register memory, information to be retrieved at the register output may be optically or electronically recognized and erased.
  • Another typical prior art device developed for special utilization such as a shifting register in a computer, applied a high frequency burst pulse to a pair of capacitively coupled electrodes which caused a glow in the gas there-between and which partially ionized the gas between a second pair of electrodes due to its proximity to the glow discharge.
  • the burst pulse is removed from the first pair of electrodes, and applied to the second pair in a time shorter than that time for the partial ionization of the gas between the second pair of electrodes to die out, the glow is transferred to the second pair of electrodes.
  • This device is limited in its utility because it depends on the principle of priming and upon necessary use of high frequency burst potentials; Another limitation, not apparent from this brief description, is the fact that the electrodes, being external of the gaseous envelope, poorly couple the electrodes and the gas, severely limiting the light output if the device is to be used as a display.
  • a third typical prior art device operating principally as a display device utilizes still a third electrode and what could be termed a continous cell adjacent the shifting cells and which utilized the priming principle through apertures in the one set of electrodes adjacent the second cell to initiate a glow discharge in this second cell.
  • This device is simply a combination of the counting technique plus the priming technique and, as such, when utilized as a display device, has no inherent memory.
  • an ionizable gas is contained in an enclosure having a plurality of transfer electrodes aligned parallel on opposite inside walls of the enclosure; the transfer electrodes being covered with a dielectric material and being offset from one another throughout its length.
  • the input is serially addressed by applying electrical pulses to an input electrode which can be either directly (uncoated) or capacitively (coated with a dielectric material) coupled to the gas and forming, with the first or nearest of the offset transfer electrodes, the first gaseous cell within the device.
  • V, V (where V, is the potential difference between the input and first electrode and V, is the firing voltage) a gaseous discharge occurs.
  • V is the potential difference between the input and first electrode and V, is the firing voltage
  • V is the potential difference between the input and first electrode and V, is the firing voltage
  • V When V, is applied to the first and second electrodes, V adds algebraically such that the total voltage between the two is greater than the firing voltage V, thus a gaseous discharge oc curs. Stated mathematically: V, V V
  • V if no discharge add occurred between the input electrode and the first electrode, no trapped charge would be present on the first electrode. Then, when V, is applied between the first and second electrode, no gaseous discharge wil occur. Stated mathematically: V, V,. Utilizing the trapped charge on the electrode wall of a previously discharged cell, the trapped charge initiated by the input pulse can be transferred along the length of the plasma charged transfer device.
  • Any input serially addressed into the plasma charged transfer device can be held at any time before there is a serial transfer to the ouput by applying an alternating potential between any two oppositely adjacent electrode pairs.
  • the present invention may be utilized either as a shift register or a display device.
  • the input pulse represents a bit of information which is transferred along the device by the above described charge transfer mechanism. An absence of an input pulse will be recognized as a digital 0 an the presence of a input pulse will be recognized as a digital l as the information is clocked into the register and transferred out.
  • the information transfer occurs throughout the length of the shift register until it is coupled to an output electrode where the information may be optically or electronically recognized. Once recognized, the information is erased by an erase electrode which is DC coupled to the ionizable gas.
  • this device can be used as a display where the input pulse is transferred serially as described above.
  • the capability of holding information for any length of time by applying alternating potential between any two oppositely adjacent electrode pairs gives the display a memory, and in a manner identical with the shift register technique, the absence of an input pulse forms a space on the dis- ,play whereas an input pulse will represent a lighted
  • one major advantage of this invention is its flexibility. It is operable as a memory register, a recirculating register or a display device and either as a static or a dynamic device.
  • a typical display When operated in parallel with similar devices, a typical display can be ade up so that one character line comprises seven parallel devices with each human readable character being five cells wide thereby forming a 7 X matrix.
  • the number of characters in a line can be expanded indefinitely without increasing the address electronic cost.
  • Another major advantage of this invention is that by placing the electrodes on the inner walls of the enclosure and coating them with a dielectric material, the capacitance formed by the walls of the dielectric material between the electrode and the gas is many times greater than the capacitance formed by the gas itself with the walls of the dielectric material.
  • C C where C represents the capacitance of the dielectric as a dielectric and the gas as a dielectric. This ratio of C to C provides more efficient coupling thus reducing the input potential required and increasing the amount of charge transferred during one gas discharge.
  • Another advantage is the use of a selected dielectric material having high secondary electron emission due to photons formed by the discharged gas in the cell. This reduces the charging time in the time required for the coupling capacitors to be charged when a gas discharge occurs between two electrodes thereby increasing the charge transfer rate.
  • FIG. 1 is a schematic cross-sectional view of the plasma charge transfer device with amplifier drivers
  • FIG. 1a is a partial schematic cross-sectional drawing of the device showing an AC input
  • FIG. 2 is a schematic cross-sectional drawing of the device showing the direction of transfer of gaseous discharge of each next opposite electrode, the electrode drive lines and a photodetector and an electronic detector in the output;
  • FIG. 3 is a schematic cross-sectional drawing of the device during a hold mode of operation
  • FIG. 4 is a simplified equivalent circuit of device showing a DC connected input, the gas capacity designated as C and the dielectric electrode coating capacity designated as C firesle r s;
  • FIG. 4a is a partial circuit similar to FIG. 4 but showing an AC input
  • FIG. 5 is a timing diagram of the waveform representations for a load and hold sequence using a DC input and with an alternative AC input in dashed lines since if an AC input is employed, the input voltage must be higher;
  • FIGS. 6a, b, c & d are detailed reference charts showing the charge transfer through the device in relation to the electrodes and to time;
  • FIG. 7 is an exploded perspective view showing the device in its practical version illustrating to advantage the manner in which the electrodes and cells are formed by sandwiching the various elements together;
  • FIG. 8 is a cross-sectional view of a portion of FIG. 7 looking in the direction of the arrows;
  • FIG. 9 is a cross-sectional view of a portion of the device shown in FIG. 7 looking in the direction of the arrows;
  • FIG. 10 is a cross-sectional view of a portion of the device shown in FIG. 7 looking in the direction of the arrows;
  • FIG. 11 is an exploded view of to that shown in FIG. 7 but further showing the keep- FIGS. 12 and 12.. are rat. Vanni. device is which one portion of the enclosure is laid open in an 99, sanda slitya shw ns
  • FIG. 13 is a fragmented plan to advantage the keep-alive input electrodes and the transfer channel;
  • FIGS. 1 through 6 are a schematic illustration of a preferred embodiment of a plasma charge transfer device as a plasma shift register memory and in the following description will be referred to as such solely for the purpose of explaining the invention and its operation whereas FIGS. 7 through 16 are more nearly illustrative of the practical version for a commerical light display and as such will be described. Nonetheless, as a practical matter the shift register memory shown and described in FIGS. 1 through 6 could operate equally as well as a display device and conversely the display device shown in FIGS. 7 through 16 could be operated as a shift register. It being significant to note that where such terminology as bits of information" as used in connection with the description of the shift register could be easily replaced and thought of as lighted cells or dark areas in the light display. The only difference in the described devices is the manner in which the information is read.
  • the gaseous .discharge plasma shift register memory 10 is shown schematically as a six bit shiftrregister.
  • Shift-register comprises enclosure or substrate 12 of any suitabledielectric'material, such as clearglass, defining a channel 13 containing an ionizable gas, such as neon and nitrogen, at a predetermined pressure.
  • A- plurality of electrodes '"14 (which may transparent, if .desired) are located on the wall of the.
  • the shift register utilizes an ionizablegas, an input electrode i which can be either directly or capacitively coupled to the gas, .capacitively coupling to the gas of oppositely ofiset electrodes, the wallvoltage which'results when charge istransferredas the result of a gaseous discharge occurring between two oppositely offset electrodes, the additive effect of this wall voltage to an applied voltage suchthata gaseous discharge occurs between two oppositely offset electrodes if charge was transferred to one of. the electrodes duringaprevious discharge whereas a gaseous discharge will not occur with this same applied voltage between any two oppositely offset electrodes which do not have charge trapped on the wall of at least one of the electrode pairs.
  • the electrodes utilize the immediate area-of thedielectric and the immediately adjacent internal wallsurface of the dielectric as a first capacitivecoupling C of each electrode with the gas.
  • the gas itself forms a dielectric for. each of the oppositely adjacent internal glass wall surfaces forming capacitance C
  • a gaseous discharge is located between the two adjacently opposite electrodes causing a charge to be formedon the positive electrode and on the negative electrode, respectively, to produce the wall charge or, as it is sometimes called, a trapped charge.
  • the voltage attributed to the wall charge has a polarity opposite to the applied voltage which initiated the discharge andupon reversal of the applied voltage after discharge,the applied voltage and wall charge are additive thereby causing another gaseous discharge.
  • the charging time defined as'the e'lapsedtime after initiation of a gaseous discharge in a plasma cell until the electrode walls are charged to 90 percent of their final value, is primarily a function of the secondary electron emission coefficient y.
  • the chargingtime is of the order of several microseconds. Howeer, when secondary electrons are emitted from the cathode due to bombardment of the cathode by photons, the charging time is usually less than 1 microsecond and can be as small as 0.1 microsecond depending on the physical conditions. Therefore, to achieve submicrosecond charging times the surface of the cell walls must efficiently emit electrons when bombarded by photons. This could be achieved by adding a small portion of molecular gas to the ionizable gas or by using a dielectric material (which covers the electrodes) that has a high photo-emissive efficiency.
  • the maximum speed of operation of the plasma shift register will depend on charging time. The smaller the charging time the faster the operational (shifting) speed of the plasma shift register.
  • every other electrode on each side of the enclosure is connected in common through four electrode line groups identified as 1, 2, 3, and 4 through a suitable switch (not shown); said line corresponding in number to the position of the electrode in sequence along the register.
  • the shift register 10 is provided with an input electrode i in direct coupled relationship with the encapsulated ionizable gas, i.e., not coated with the dielectric material 18.
  • this input electrode i may be capacitatively coupled to the gas in the same manner as the other electrodes 1, 2, 3, and 4, although a different input voltage is required. This is shown in FIG. 1a.
  • FIGS. 1 and 2 also show a keep-alive cell formed by a pair of electrodes 6 and 7 capacitively coupled to the gas and connected to a source 20 of alternating pulse voltage of sufficient magnitude to ionize the gas within the cell to insure sufficient ionized particles always available at the first cell formed by input electrode i and first electrode.
  • an erase electrode e also directly coupled to the encapsulated gas to clear and transfer any bit information at the last load position in the register, and means are provided in the form of aphotodetector 22 for detecting the discharge of the last gas cell as a means of reading the information out in the register.
  • the alternative electronic read out means 24 is also shown in FIG. 2 in theform of an induction coil 26 for sensing the current on the line of erase electrode e as an indication of the information at the end of the shift register.
  • FIGS. 5 and 6a-d for an explanation of the shifting of bit information along the shift register 10 when the register is in the shifting mode and for an explanation of the holding ability when the register is in a hold mode and is performing as a static register.
  • FIG. 5 is a timing diagram showing the voltage pulse sequence applied to the common electrode lines 1, 2, 3, and 4 and the input electrode to load and hold bits of information onto the shift register memory shown in FIGS. 1 and 2.
  • Increments of time T,T and T correspond to the load operation and each is divided into 9 sub-increments in order to depict the exact timing of the voltage pulses.
  • Increments of time T T and Ty correspond to the hold operation and each is divided into 4 sub-increments in order to depict the exact timing of the voltage pulse for this sequence.
  • T would be 40 microseconds with the time between and l of 2.5 microseconds; between 1 and 2 of 2.5 microseconds; between 2 and 3 of microseconds; 3 and 4 of 5 microseconds; 4 and 5 of 5 microseconds; 5 and 6 of 5 microseconds; 6 and 7 of 5 microseconds; 7 and 8 of 5 microseconds; 8 and 9 of 5 micro seconds; and T would be microseconds with the time between 0 and 1 of 5 microseconds, etc.
  • FIGS. 6a-d times T with its 9 increments, represented along the left hand side of the figures, with the electrodes again represented simply by the numerals l, 2, 3, and 4.
  • the solid segmented horizontal lines represent the internal glass wall but identified by its corresponding electrode wall number of the cell with the wall charge being represented by the conventional positive and negative symbols.
  • V,- represents the input voltage pulse
  • V represents the voltage sufficient to cause discharge of the gas in the cells
  • V is the clocking voltage applied to the four common groups of electrodes
  • V represents a potential due to the trapped wall charge; and, for the sake of clarity, the actual trapped charge on each internal wall representing the portion of charge trapped on that coupling capactior will be referred to as 0, which charge, as stated aforesaid, does not appear until after the gaseous discharge in any particular cell.
  • the timing diagram at time T, the input electrode i is switched from zero volts to V, but no discharge takes place in cell 1 since the potential difference between input electrode i and the first electrode 1 is not sufficiently high (V, V, V,); electrode 1 being at V,.
  • all electrodes 1 are driven to zero voltage while the input electrode is held at V, so that V,, the discharge voltage, is exceeded (V, V,) causing a gaseous discharge between be input electrode and the electrode of the first cell of electrode 1.
  • This discharge is extinguished in a very short period of time (0.2 microseconds to 0.5 microseconds) and the wall charge Qtc is trapped on the wall of the dielectric covering the first electrode 1.
  • the electrode 4 are driven to zero which together with the trapped charge cause a discharge in cell 4 between the electrodes 3 and 4 and it again causes a reversal in polarity of the charges adjacent the electrode 3 and a positive charge adjacent electrode 4 of cell 3.
  • the register can be placed in a hold mode so that the bits are not transferred but held at the load position thus forming a static register. This is accomplished as shown between timing diagrams, FIG. 5 and FIG. 6d, typically in the T sequence and schematically shown in FIG. 3.
  • T all electrodes 3 are driven to zero while all electrodes 1, 2 and 4 are held in V,.
  • This causes a gaseous discharge between the cells having a 1's bit which is shown in FIG. 6c in the first and third load position of the 3 bit register.
  • the wall cell charge is reversed, and, at time T, when all electrodes 3 are driven to V,, there is no discharge and thecapacitive charge of the cell wall remains the same.
  • the discharge of this last cell may be read either optically by a conventional photo-detector 22 (FIG. 2) which produces a signal output to be read by any suitable device, or can be read directly electronically by sensing the charge transferred from the last electrode position to the erase electrode by induction coil 26.
  • the voltage pulse sequence applied to the erase electrode e will be identical to that appliced to electrodes 1.
  • the voltage pulse sequence and a pictorial representation of the charge transfer condition is shown for a portion of the load mode when the input electrode is capacitively coupled is shown in FIG. 6d.
  • a discharge occurs between the input and the first electrode 1'.
  • V in this case is higher than the DC case therefore.
  • the charge deposited on the wall of the dielectric covering the input and 1 is depicted as larger than the DC case.
  • the charge on the input remains trapped there since the input is capacitively coupled.
  • the input electrode goes back to 0 and all electrodes 2 are driven to 0.
  • a voltage greater than V exists between the input and the first electrode 1 and the first electrode 1 and the first electrode 2 and a gaseous discharge occurs between both of these pairs resulting in the charge condition shown.
  • the register can be of any bit length desired, can be made recirculting, and while only one register is shown, obviously a number of registers can be operated parallel utilizing the same pulse amplifiers and, it is foreseeable, depending upon the gas used, that information may be transferred through the length of the register at frequencies of typically 25 KHz. Practical limits on the transfer rate are approximately 125 KHz on the high end to 0 Hz on the low end.
  • FIGS. 7through 16 the items having the same function as an item in FIGS. 1-6, will be given the same reference numeral except with an exponent.
  • the plasma discharge display device is indicated generally at 10 corresponds to the gaseous discharge shift register memory 10 of FIGS. 1-4.
  • the display device 10' comprises an enclosure formed of two flat substrates 12'.
  • For conductor 14' are located on the inside wall 16 of each of the flat substrates along the outer edges of the sub-- strates forming a continuous conductor with a plurality of interstices or electrodes 1-4' extending laterally.
  • Two sheets of dielectric material 18' for coating the electrodes overlay the instices.
  • the top sheet of dielectric material is shown separately for the purposes of clarity.
  • Sandwiched between the two layers of dielectric material 18' are 2 flat sheets of opaque glass cavity forming material 12" together with the substrate 12 and the dielectric coating material 18' form seven channels 12. As shown in FIG. 7 and more clearly in FIGS.
  • the two parts of the display formed by the glass substrate 12 with the electrodes thereon the dielectric material 18 and one sheet of the opaque glass cavity material 12" are offset lengthwise one to another to conveniently expose the ends of the conductors 1'4.
  • this offset also exposes conveniently the seven input electrodes i i, and erase electrode e, 2'
  • the channels each operate in a manner identical to that described in connection with the operation of the device shown in FIGS. 1 and 2 but in this instance a discharging cell forms a light emitting dot as a bit of information and the timing for the load mode and the hold mode is exactly as shown in FIG. 5.
  • FIG. 11 shows one-half of a seven channel display device similar to that described in FIGS. 7-10
  • FIGS. 12a and 12b show both pairs forming the seven channels laid in and open sandwich configuration to clearly show the additional seven keep-alive electrodes, 6' and 7' which function in this display identically as described in connection with the device shown in FIGS. 1 and 2.
  • These keep-alive electrodes like the other electrodes capacitively coupled to the gas in each of the channels by a coating of dielectric material 18' formed by two sheets of such material when the two sections are sandwiched together such as described in connection with FIGS. 7-10.
  • FIG. 13 is an enlarged fragmentary portion showing some of the channels and electrodes formed in the display device.
  • FIG. 14 where there is shown a schematic illustration of a plasma charge transfer device as a one character line display with two characters.
  • a character would comprise a 5 X 7 matrix but for the sake of clarity to describe the operation of the device only seven input i and 4 transfer electrodes 1 through 4 with conductors 14' are shown without showing the other details such as the channels.
  • the erase electrodes e' through e' are connected to the same driver as conductor electrodes 1.
  • the plasma charge transfer device in its plasma display configuration shown in FIGS; 7 through 13 had seven inputs and seven channels, it is obvious that the plasma display device could have many more inputs and charge transfer channels. For example, a large plasma page display could have 512 channels and 512 sets of electrodes 1' through 4' for each channel. This could give the display 262,244
  • alphanumeric dot matrix display where the alphanumeric character A, B-Z; 0, 1-9 is formed by an array of 35 dots seven high and five wide.
  • the alphanumeric array X 7 is shown in FIG. while the electrode configuration for a two character display is shown in FIG. 14. Each display dot is formed by the interaction of a channel and a set of transfer electrode pairs 3' and 4.
  • the character line need not be limited to the two characters as illustrated in FIG. 14 but could have as many characters as desired.
  • FIG. 16 shows a plurality of character lines 10", each character line similar to that shown in FIG. 14, preferably all connected on a common substrate although shown separately in FIG. 16
  • a plasma charge transfer device comprising:
  • means including at least one envelope defining an elongated channel containing an ionizable medium
  • a plurality of transfer electrode means arranged in alternating sequence and offset one from another on opposite sides of the inside walls of said channel and capacitively coupled to said medium;
  • sustaining potential for applying sequentially to said transfer electrode means a sustaining potential of-a magnitude no greater than that required to maintain ionization if ionization of the ionizable medium were taking place in proximity to said transfer electrode means, said sustaining potential being applied after the ionization of said ionizable medium has ceased but before the charge stored at the transfer electrodes by the capacitor coupling to said medium, when added to said sustaining potential, reduces to a level below the level required to cause ionization such that the sequential application of said sustaining potential will cause an ionization of the ionizable medium between certain of said transfer electrode means and a shifting of the occurrence of plasma discharges along the length of said channel.
  • the plasma charge transfer device as claimed in claim 1 further including output means for identifying the plasma discharges transferred along said channel.
  • the plasma charge transfer device is claimed in claim 2 wherein said output means is a light sensitive means responsive to the light emitted by a plasma discharge in the last pair of transfer electrode means.
  • said output means comprises an electrode means within said channel and coupled to inductive means for measuring the transfer of energy from the last of said transfer electrode means as said plasma discharges at the end of said channel.
  • the plasma charge transfer device as claimed in claim 1 further including keep-alive electrodes within said channel energizable by electrical energy to maintain ionized particles in said ionizable medium and located'in close proximity to said input electrode means.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Shift Register Type Memory (AREA)
US00255547A 1972-05-22 1972-05-22 Plasma charge transfer device Expired - Lifetime US3781600A (en)

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JP (2) JPS5826139B2 (enrdf_load_stackoverflow)
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US3973166A (en) * 1973-12-26 1976-08-03 Burroughs Corporation Display panel for displaying bars of light
US4027197A (en) * 1975-10-08 1977-05-31 Ncr Corporation Variable bar display tube using insulated electrodes
US4051409A (en) * 1976-01-13 1977-09-27 Ncr Corporation Load and hold system for plasma charge transfer devices
US4051408A (en) * 1976-01-13 1977-09-27 Ncr Corporation Circular plasma charge display device
US4233544A (en) * 1979-05-09 1980-11-11 Ncr Corporation Input-keep alive arrangement for plasma charge transfer device
US4283660A (en) * 1979-08-23 1981-08-11 Ncr Corporation Multiline charge transfer panel input and hold system
EP0031233A3 (en) * 1979-12-17 1981-12-02 Fujitsu Limited Self-shift type gas discharge panel
US4306234A (en) * 1980-05-05 1981-12-15 Modern Controls, Inc. X-Y Serial shift panel
WO1982000220A1 (en) * 1980-06-30 1982-01-21 Ncr Co Electrodes for gaseous discharge devices
WO1982002314A1 (en) * 1980-12-22 1982-07-08 Ncr Co Plasma charge transfer device
US4350932A (en) * 1980-10-20 1982-09-21 Ncr Corporation Method of plasma panel drive to reduce flash and create dimming
EP0068982A3 (en) * 1981-06-23 1983-08-03 Fujitsu Limited Self-shift type gas discharge panel
US4476466A (en) * 1980-05-09 1984-10-09 Hitachi, Ltd. Driving method of gas-discharge display panel
FR2547942A1 (fr) * 1983-06-23 1984-12-28 Nec Corp Dispositif de visualisation a plasma a transfert de charge
US4613794A (en) * 1982-11-25 1986-09-23 Nec Corporation Charge transfer plasma display device

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JPS5068737A (enrdf_load_stackoverflow) * 1973-10-22 1975-06-09
JPS538053A (en) * 1976-07-09 1978-01-25 Fujitsu Ltd Gas discharging panel
JPS5317059A (en) * 1976-07-30 1978-02-16 Fujitsu Ltd Gas discharge panel
JPS5320859U (enrdf_load_stackoverflow) * 1976-07-31 1978-02-22
JPS5345169A (en) * 1976-10-05 1978-04-22 Fujitsu Ltd Gas discharge panel
JPS5369533A (en) * 1976-12-03 1978-06-21 Fujitsu Ltd Shifting method for discharge spot
JPS5760522Y2 (enrdf_load_stackoverflow) * 1977-04-08 1982-12-23
JPS53142827A (en) * 1977-05-19 1978-12-12 Fujitsu Ltd Driving system for gas discharge panel of self shift type
JPS57182941A (en) * 1981-05-06 1982-11-11 Nec Corp Plasma display panel

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Publication number Priority date Publication date Assignee Title
JPS4873073A (enrdf_load_stackoverflow) * 1971-12-29 1973-10-02
JPS4895174A (enrdf_load_stackoverflow) * 1972-03-15 1973-12-06

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973166A (en) * 1973-12-26 1976-08-03 Burroughs Corporation Display panel for displaying bars of light
DE2457749A1 (de) * 1973-12-26 1975-07-10 Burroughs Corp Anzeigetafel
US4027197A (en) * 1975-10-08 1977-05-31 Ncr Corporation Variable bar display tube using insulated electrodes
US4051409A (en) * 1976-01-13 1977-09-27 Ncr Corporation Load and hold system for plasma charge transfer devices
US4051408A (en) * 1976-01-13 1977-09-27 Ncr Corporation Circular plasma charge display device
US4233544A (en) * 1979-05-09 1980-11-11 Ncr Corporation Input-keep alive arrangement for plasma charge transfer device
WO1980002491A1 (en) * 1979-05-09 1980-11-13 Ncr Co Input-keep alive arrangement for plasma charge transfer device
EP0039679A4 (en) * 1979-08-23 1984-03-27 Ncr Corp MULTI - LINE LOAD TRANSFER PANEL CONTROL SYSTEM.
US4283660A (en) * 1979-08-23 1981-08-11 Ncr Corporation Multiline charge transfer panel input and hold system
EP0031233A3 (en) * 1979-12-17 1981-12-02 Fujitsu Limited Self-shift type gas discharge panel
US4306234A (en) * 1980-05-05 1981-12-15 Modern Controls, Inc. X-Y Serial shift panel
US4476466A (en) * 1980-05-09 1984-10-09 Hitachi, Ltd. Driving method of gas-discharge display panel
WO1982000220A1 (en) * 1980-06-30 1982-01-21 Ncr Co Electrodes for gaseous discharge devices
US4350932A (en) * 1980-10-20 1982-09-21 Ncr Corporation Method of plasma panel drive to reduce flash and create dimming
US4367468A (en) * 1980-12-22 1983-01-04 Ncr Corporation D.C. Input shift panel driver circuits-biased inputs
WO1982002314A1 (en) * 1980-12-22 1982-07-08 Ncr Co Plasma charge transfer device
EP0068982A3 (en) * 1981-06-23 1983-08-03 Fujitsu Limited Self-shift type gas discharge panel
US4423356A (en) * 1981-06-23 1983-12-27 Fujitsu Limited Self-shift type gas discharge panel
US4613794A (en) * 1982-11-25 1986-09-23 Nec Corporation Charge transfer plasma display device
FR2547942A1 (fr) * 1983-06-23 1984-12-28 Nec Corp Dispositif de visualisation a plasma a transfert de charge

Also Published As

Publication number Publication date
CA975072A (en) 1975-09-23
JPS55166843A (en) 1980-12-26
JPS4943535A (enrdf_load_stackoverflow) 1974-04-24
JPS5826139B2 (ja) 1983-06-01

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