EP0266462A1 - Plasmaanzeigetafel mit unabhängigen Schaltungen für Entladungsschaltung und Adressierung - Google Patents

Plasmaanzeigetafel mit unabhängigen Schaltungen für Entladungsschaltung und Adressierung Download PDF

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Publication number
EP0266462A1
EP0266462A1 EP86308593A EP86308593A EP0266462A1 EP 0266462 A1 EP0266462 A1 EP 0266462A1 EP 86308593 A EP86308593 A EP 86308593A EP 86308593 A EP86308593 A EP 86308593A EP 0266462 A1 EP0266462 A1 EP 0266462A1
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European Patent Office
Prior art keywords
sustain
discharge
address
electrodes
plasma
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EP86308593A
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English (en)
French (fr)
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EP0266462B1 (de
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Larry F. Weber
Richard C. Younce
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University of Illinois
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University of Illinois
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Priority to EP86308593A priority Critical patent/EP0266462B1/de
Priority to AT86308593T priority patent/ATE96567T1/de
Priority to DE86308593T priority patent/DE3689233D1/de
Priority to AU64839/86A priority patent/AU600239B2/en
Publication of EP0266462A1 publication Critical patent/EP0266462A1/de
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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
    • 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
    • G09G3/291—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/292—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for reset discharge, priming discharge or erase discharge occurring in a phase other than addressing
    • G09G3/2927—Details of initialising
    • 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
    • G09G3/291—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/293—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for address discharge
    • 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
    • G09G3/291—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • 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
    • G09G3/297—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 opposed discharge type panels
    • 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
    • G09G3/298—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 surface discharge panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0228—Increasing the driving margin in plasma displays
    • 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
    • G09G3/298—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 surface discharge panels
    • G09G3/2983—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 surface discharge panels using non-standard pixel electrode arrangements
    • 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
    • G09G3/298—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 surface discharge panels
    • G09G3/2983—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 surface discharge panels using non-standard pixel electrode arrangements
    • G09G3/2986—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 surface discharge panels using non-standard pixel electrode arrangements with more than 3 electrodes involved in the operation

Definitions

  • This invention relates to gas discharge panels and, more particularly to gas discharge panels which make use of plasma coupling for write and erase cycles.
  • Plasma display panels or gas discharge panels, are well known in the art and, in general, comprise a structure including a pair of substrates respectively supporting thereon column and row electrodes each coated with a dielectric layer such as a glass material and disposed in parallel spaced relation to define a gap therebetween in which an ionizable gas is sealed. Moreover, the substrates are arranged such that the electrodes are disposed in orthogonal relation to one another thereby defining points of intersection which in turn define discharge cells at which selective discharges may be established to provide a desired storage or display function.
  • the state of a particular cell within a shift panel, whether on or off, is shifted to the next adjacent cell by using either priming coupling or wall-charge coupling.
  • the first method, priming coupling uses priming particles produced by a nearby on cell to reduce the firing voltage at the next cell location in the shift sequence. A voltage is applied to the next cell in the sequence so that it will turn on only if it receives sufficient priming form its neighboring cell. Thus information is shifted from cell to cell across the entire display.
  • the priming techinque relies on the presence of priming articles generated at an addre ssed cell location to effect one of its surrounding display pixels in such a way that allows it to be written or erased. Therefore, to use the priming technique in other than a shift mode, the proximity of the selected pixel to the selected address cell must be the controlling effect that allows it to be selected from the thousands of other display pixels receiving the same voltage signals.
  • the priming particles produced from a discharge are somewhat locally constrained.
  • electrons, ions, metastables, and photons produced in a gas-discharge can serve as agents in priming other nearby cells.
  • the electrons, ions, and metastables are confined to affect only nearby cells because of their interactions with the electric fields and reactions with other gas-discharge phenomenon.
  • the photons are unhindered by any of the events in the gas volume and can effectively prime cells at some distance.
  • the main drawback of priming is that other cells at a distance are caused to be "primed" in addition to the selected cells, resulting in spurious discharges - an undesirable result.
  • Wall-charge coupling uses the actual transfer of charge from one cell to the next to accomplish the shifting.
  • a cell will only fire if it receives a transfer of electrons produced when proper voltages are applied to a neighboring cell, one of whose electrodes is common to both cells. In such case, the common electrode acquires a wall charge which influences the discharge state of the next cell in line.
  • Such types of devices are described by W. E. Coleman et al, in Device Characteristics of the Plasma Charge transfer Shift Display," IEEE transactions on Electron Devices , Vol. ED-28, pp. 673-679, June, 1981.
  • a somewhat different type of shift panel is described in U.S. Patents 4,430,601 and 4,328,489 to Peter D. T. Ngo.
  • the shift panels disclosed therein include both display columns and "transfer" columns.
  • an excitation pulse if applied to the display column and a priming pulse to the transfer column.
  • the plasma discharge created by the excitation pulse is said to be transported to the transfer column by the action of the priming pulse causing it to switch on the ON state.
  • Careful analysis of the Ngo structure shows, however, that the plasma discharge is actually forced to migrate to an area whose residual wall voltages are invariably more negative than the wall voltage at the display site where the plasma originated. In essence the plasma is forced to travel "uphill” and the resulting panel operation has been shown to have poor operational margins.
  • Shift panels suffer from a number of other disadvantages such as slow panel update rates; no random access ability; and poor yields due to the fact that one defective pixel will cause the loss of an entire line.
  • a gas discharge panel which employs the phenomenon of plasma spreading.
  • plasma spreading or "coupling” is employed to couple the plasma at an addressed cell to one of a plurality of pixels to be illuminated.
  • the spreading is controlled by assuring that the wall voltages are properly related so that the plasma electrons migrate to a region where the voltages are approximately equal to or more positive than the wall voltages where the plasma originated and deposit residual wall charges.
  • Paired sustain electrodes are subsequently selectively energized, which, in combination with the residual wall charges cause the desired discharge site to be turned on or off.
  • a plasma discharge is, in essence, a region with a high density of positive and negative charges of nearly equal proportions.
  • ions and electrons make up the charges within the plasma.
  • the plasma acts like a metal conductor by carrying charges in the presence of a field until the field is sufficiently offset to stop the breakdown of the gas.
  • positive and negative charges are transferred to opposite dielectric walls by the plasma to oppose the field created by the applied voltage.
  • the polarity of the applied voltage during the sustain sequence is usually reversed after a period of time.
  • a phenomenon known as plasma spreading has been observed in the past in plasma discharge panels. Some designers have sought ways to avoid such spreading due to the "bloom" which it causes at pixel sites and the resultant degradation of the display's quality. Others (i.e. Schermerhorm in U.S. Patent 3,925,703) have used it to assure that all gas cells in a multi-cell pixel are illuminated upon the application the sustain signal. Only recently has quantitative data been taken which supports the existence of plasma spreading along both the anode and cathode. The speed of plasma spread along the cathode has been measured to average about 460 meters per second, whereas along the anode it spreads at 6250 meters per second, an order of magnitude greater than the cathode plasma speed.
  • the difference in the plasma speed is due to the difference in the mobilities of the electrons and heavy ions. Since the highly mobile electrons are acting along the anode, the speed of the plasma in this area would be higher than in the area of the cathode where the slow ions control the discharge rate.
  • a cross section of a series of pixel sites are shown.
  • conductors 10, 12 and 14 are supported on glass plate 16 and are provided with a dielectric overcoat 18.
  • Dielectric 18 is preferably glass with a magnesium oxid overcoat.
  • Orthogonally oriented conductor 20 is supported by glass plate 22 and also is coated with glass/MgO dielectric 24.
  • a plasma discharge 26 will occur and wall charges immediately begin to build up in opposition to the applied voltage. Additionally, plasma discharge 26 will preferentially spread along the portion of dielectric layer 24 which immediately overlays conductor 20 (anode) and will deposit negative charges onto the dielectric surface.
  • the aforementioned spreading of the plasma can be used to "write" pixels. If it is assumed that dielectric layer 24 at all discharge sites in Fig. 1 have zero initial wall charges, the plasma discharge spreads along conductor 20 (anode) and deposits electrons on dielectric layer 24 at all three sites. A smaller population of ions is deposited on the portions of dielectric 18 which cover conductors 10, and 14. These deposited charges leave residual wall voltages at the two outside discharge sites. If the residual wall voltages are sufficiently large, the cells will be caused to discharge upon the application of subsequently applied sustain voltage transitions. The residual wall voltage levels at the outer pixel sites have been found to be dependent substantially on the strength of the discharge at the central cell.
  • Fig. 2 a plan view of a plasma panel constructed in accordance with the invention is shown. All horizontal electrodes in Fig. 2 (along with their associated electronics) reside on one substrate of the panel and are referred to as Y electrodes. All of the vertical electrodes (and their associated electronics) reside on the opposite substrate and are termed the X electrodes. In this arrangement, electrodes used for addressing are separated form those used to perform the sustaining operation. In Fig. 2 there are 8 ⁇ 8 or 64 display pixels indicated by black dots 31. Each of X address electrodes 30, 32, 34, and 36 are connected to a suitable circuit driver 38, 40, 42 and 46, respectively.
  • each of Y address electrodes 48, 50, 52 and 54 are connected to circuit driver 56, 58, 60 and 62, respectively.
  • the intersections of each X and Y address electrode forms what will be referred to as an "address" cell. This address cell is used only during addressing operation and is not used as a normal display pixel.
  • the X sustain signals are provided by two sustain generators 70 and 72, whereas the Y sustain signals are applied from sustain generators 74 and 76.
  • Each successive pair of sustain electrodes (eg. 78 and 80) are shorted together by shorting bars 82 and 84 at either end thereof, thus forming what shall be referred to hereinafter as a sustain electrode pair.
  • Alternating sustain electrode pairs on a given substrate are bussed together by a sustain bus resulting in two sustain bussed on each substrate.
  • busses 71 and 73 are repectively connected to sustain generators 70 and 72 and on the Y substrate, buses 75 and 77 are connected to sustain generators 74 and 76.
  • this arrangement results in only two connections along the X sustain edge of the panel and two connections along the Y sustain edge. With this sustain arrangement, four circuits are needed to completely sustain the panel. This remains true regardless of whether the panel is 8 ⁇ 8 or 512 ⁇ 512 pixels in size.
  • edge field electrodes 90, 92, 94 and 96 are also shown in Fig. 2. These are sustain electrodes which reside along the four edges of the addressable area of the panel. The pixels at these locations are not addressable. These extra sustain electrodes are required in order that the outer-most addressable pixels see a similar field as the other pixels in the panel. Also, these extra sustain electrodes complete the loop of the sustain electrode pairs along the border of the display.
  • Fig. 3 The area encircled by the dashed line and denoted as as 100 in fig. 2 is shown in detail in Fig. 3. Note, that as in Fig. 2 , all X-level electrodes are supported by one substrate, and all Y electrodes are supported by the other substrate with an ionizable gas disposed therebetween.
  • Address cell a resides at at the center of the Fig. 3.
  • the four nearest neighboring display pixels to address cell A are labeled as P1, P2, P3, and P4.
  • Four additional discharge locations act as "coupling" cells with the two vertical coupling cells being labeled C1 and C4, and the horizontal coupling cells denoted as C2 and C3.
  • each of the four display pixels, P1-P4, are controlled by a different combination of X and Y sustainer conductors.
  • Pixel P1 is defined by the intersection of the XSa/YSa sustain electrodes
  • pixel P2 is defined by the intersection of the XSb/YSa electrodes, etc.
  • each address cell is surrounded by eight discharge sites wherein four (P1-P4) are used as actual pixel display sites, and four (C1-C4) are used to accomplish the selective control of the display pixel sites.
  • Video data is entered along the column electrodes for on horizontal row at a time. The top row of the panel is addressed first. After a row is completely addressed, a horizontal synch signal signifies that the next row in the panel is to be addressed. This row by row scanning continues until the bottom row in the panel is addressed at which time a vertical synch signal indicates the start of a new frame and the scanning sequence begins again at the top row of the panel.
  • this addressing technique to the panel shown in Fig. 2, initially all display pixels in the two rows on either side of a Y address electrode are written.
  • FIG. 4 the applied voltages to each of the sustain and address lines are indicated; the net applied voltages experienced by each of pixels P1-P4, coupling cells C1-C4 and the address cell A; and their respective wall voltages (drawn dashed and inverted-as in conventional).
  • the diagrams in Fig. 5 show the respective cell states after the discharge caused by the applied voltage transitions at the various times T1-T10.
  • the plus signs represent positive charges and minus signs negative charges.
  • the charges have been placed on either the top or the bottom electrodes to reflect on which side of the cell they reside after the discharge activity has been completed at the given time. If four diagonal lines surround the cell, it indicates that the cell discharges at the time indicated.
  • the application of the negative going pulse at T2 on Y address electrode 52 causes discharges to occur in both the A address cell as well as coupling cells C2 and C3.
  • both XSa and XSb electrodes are approximately 150 volts more positive for the period between T2 an T3.
  • the electrons from the plasmas which are created by the discharges at coupling cells C2 and C3 and address cell A travel along the vertical electrodes into the pixel sites P1-P4 on either side of the discharging cells (See Fig. 5 at time T2).
  • both XSa and XSb sustain electrodes have positive pulses applied thereto and, in conjunction with the prestored wall voltages, pixels P1, - P4 are caused to discharge and to emit a light pulse. (It should be remembered that only a pulse of light is given off at each wall voltage excursion).
  • pixels P1 - P4 do not discharge since there is insufficient voltage drop across the cells. Subsequently, the positive going excursion on the YSa and YSb sustain lines cause pixels P1 - P4 to discharge. At time T4, the negative going excursion of the sustain lines resets the wall charges in the horizontal coupling cells C2 and C3 to their original state.
  • horizontal coupling cells C2 and C3 initiate discharges which affect display pixels P1 - P4.
  • the associated X dimension sustain electrodes act as anodes during the C2, C3 discharges thereby allowing the plasma generated by the discharging coupling cells to reach into the display pixels and to deposit electrons beneath the sustain electrodes.
  • the deposited electrons reduce the wall voltages from near 0 to some negative value which, upon future sustain cycles, cause display pixels P1 - P4 to discharge.
  • Fig. 4 shows one set of write two rows waveforms
  • Those cases consist of two possible polarities of the Y A pulse (both positive and negative) in combination with the two possible polarities of the X and Y sustain pulses. All four cases work with excellent voltage margins even though each uses a different physical addressing mechanism.
  • an erase cycle is commenced which erases selected pixels to provide the desired information content for each display line.
  • the selective erase of a pixel is a two step process and may be understood by referring to Fig. 6.
  • cell A is addressed by simultaneous application of positive and negative pulses to the X and Y address lines respectively. This causes a plasma to be created at address cell A which spreads along the X address line electrode (anode). The plasma reaches into vertical coupling cells C1 and C4, causing electrons to be deposited on their dielectric walls beneath the X address line electrode.
  • address cell A In the first step of the erase sequence, address cell A must be used to influence the vertical coupling cells C1 and C4.
  • address cell A For the purpose of example, consider erasing pixel P1 (upper left-hand pixel). As shown in Fig. 4, between times T6 and T7, the sustain voltages applied to XSa and XSb cause each of pixels P1 - P4 to discharge in the normal sustain mode (they having already been written into the "on" state during a previous Write Two Rows cycle). At time T7, a positive going pulse is induced on X address electrode 34 and a negative going select pulse is induced on Y address electrode 52.
  • the second step of the erase sequence starts at time T8.
  • the C1 coupling cell whose X address electrode dielectric was negatively charged in the first step of the erase operation is used to erase pixel P1.
  • the voltages on both sustain lines XSa and YSa rise to approximately 100 volts. Due to the previously stored wall charges at C1 which are additive to the applied potential on sustain line YSa, cell C1 is caused to discharge. (Note that C1 would not discharge at this time if its wall voltage had not been raised at time T7). Also the raised voltage on the YSa electrode causes it to act as an anode during C1's discharge and allows the plasma created thereby to be coupled into the P1 pixel site.
  • coupling cell C4 must not discharge at time T8. This is assured by controlling sustain electrode YSb differently from sustain electrode YSa. Note that there is no positive going transition at time T8 on YSb thereby preventing any discharge at coupling cell C4.
  • the X and Y address line voltages fall, there is a substantial voltage change impressed across address cell A which creates a discharge. In this instance, as contrasted to prior instances, it is the ions which migrate (slowly) towards cell C4 and act to neutralize the prestored wall charges therein. This sets up C4 for a subsequent address cycle.
  • the first erase subcycle is used to erase pixels on the top row that are controlled by the XSa sustain electrode.
  • the second erase subcycle is used to erase any of the display pixels along the top row controlled by the XSb sustain electrode.
  • the third and fourth erase subcycles are used to erase the display pixels on the the XSa and XSb sustain electrodes along the bottom row.
  • Fig. 7 the waveforms required for the subcycle erase operation are shown.
  • the dashed line on the Xa address line shows the voltage as applied to the X address electrode if the pixel corresponding to the particular erase cycle is to be erased.
  • the dashed line on the Ya address line shows the voltage applied to the single Y address electrode that runs between the two horizontal rows of pixel electrodes being addressed.
  • the solid line along the Ya address indicates that all other Ya electrodes are not perturbed.
  • the XSa and YSa address lines are both at a high level just after the fall of the Xa erase pulse. This erases any pixel that is at the XSa/YSa intersection providing a discharge first occurred at its address cell.
  • XSb and YSa sustain lines are both at a high level. Any "on" pixel residing at the intersection of the XSb/YSa sustain electrodes will be erased providing that its address cell was selected at the beginning of the erase cycle. Succeeding cycles work in a similar fashion.
  • the YSa address line is selected in the first two cycles when the pixels on the top electrodes are being erased, while the YSb electrode is selected during the last two cycles when the bottom row of pixels are being erased. It will also be noted that each of the erase cycles is actually composed of an erase and a sustain. A single sustain discharge is needed after the erase cycle to complete the subcycle.
  • a further advantage of the above-described design is the reduction in the number of potentially defective panels during manufacturing. It can be demonstrated that the electrode yield is increased by a factor of two over the standard electrode design. This is due to the fact that panel yield is most often hurt by electrode breaks.
  • the key factor that contributes to the increased yield are the sustainer electrode design and the decreased number of address electrodes. In essence, each sustain electrode is doubled so that a break on one does not necessarily disconnect pixels below the break from the drive circuitry. The pixels below the break are still connected to the line drivers via the shorting bar that connects to the neighboring sustain electrode. This alternate conduction path allows all pixels on the broken electrodes to remain fully operational.
  • a further feature of this development is that there are less sustain bus crossovers than in previous designs. In addition, the peak currents required from the sustain drivers are lessened due to their duplication.
  • a plasma panel constructed in accordance with the above teaching has been successfully operated. It specifications are as follows: Dielectric Glass thickness: 25 um Dielectric Glass Dielectric Constant: 15 MgO Overcoat Thickness: 150 nm Gas Gap Distance Between Substrates: 100um Gas Mixture: 400 torr Ne + 0.1% Ar Electrode Width: 75um Center to Center Spacing of Pixels: 400 um Center to Center Spacing of Address and Sustain Electrodes: 200um
  • the number of connections to the panel can be further reduced by employing a gas discharge serial-to-parallel shift register to load the gas discharge X and Y address gates.
  • gas discharge shift registers are compatible with the technology of the herein-described plasma coupling structures.
  • serial shift register operates in principle similarly to that shown in the Coleman, et al. article cited hereinabove.
  • the parallel output from the shift register would be applied directly to the X and Y address gates.
  • Such operation requires that only on Y address electrode (horizontal) be selected at any one time.
  • the gas discharge shift register for the Y axis needs to shift only on bit along the Y axis to select the single AND gate that addresses the single Y address electrode. Since suitable gas discharge shift registers can be designed with as few as 4 electrode inputs, such a technique offers a considerable advantage over other techniques such as the one discussed above requiring 32 drivers. In video mode, only these 4 inputs would need be driven for a display of any number of Y address electrodes. Such a gas discharge shift register could also be used for the X axis address drivers, however, the data input to this X shift register would be more complicated, reflecting the video input to the display.
  • the output of the shift register can be in the form of a voltage on an electrode that is connected to the input electrode of the gas discharge AND gate.
  • the output of the shift register can be a plasma in the shift register that couples to the gas discharge AND gate to deposit wall charges that will cause the AND gate to discharge.
  • the gas discharge AND gates can also act as storage registers to hold binary information by means of the wall charges in the AND gate. If these wall charges are present and the appropriate pulses are applied to the electrodes of the AND gate, then the gate will generate an output pulse that can be used to drive a plasma panel address electrode.
  • the gas discharge shift register having video or other data can be used to transfer data to the storage register in the AND gate and then the AND gate can be pulsed at a later time as required by the addressing requirements of the plasma display.
  • a plasma display is constructed by first depositing a set of parallel electrodes on the substrate glass. For purposes of illustration these will be designated the X electrodes. A dielectric layer is then deposited over the substrate which covers the X electrodes. Next a set of parallel Y electrodes is deposited on the dielectric layer and are positioned to be orthogonal to the parallel X electrodes. Next a dielectric layer is deposited over the Y electrodes.
  • selective erase may be employed in comparison to that shown in Fig. 6.
  • the selective erase technique is a two step process whereby the pixel P1 is addressed by means of discharges in coupling cell C1 and address cell A. It is also possible to address pixel P1 through coupling cell C2.
  • the Y A electrode would be made the anode so that the plasma would spread along the horizontal direction to horizontal coupling cells C2 and C3.
  • one of the horizontal coupling cells C2 or C3 would be discharged to address one of the pixels.
  • the waveforms to accomplish this are virtually ⁇ the same as shown in Fig. 4 with the exception that all of the applied X and Y waveforms are exchanged. Also appropriate modifications are made in the sequencing of the sustain pulses diring the four erase periods shown in Fig. 7 so that the erase s equence of P1, P2, P3, and P4 is preserved. It is desirable to preserve this erase sequence so to accommodate the video input data stream.
  • This sequence has an advantage that the discharge sequence of the coupling cells is staggered. For example, when erasing through the horizontal coupling cells, the coupling cell firing sequence for the four erase cycles would be C2, C3, C2, C3.
  • the technique shown in Fig. 7 that uses the vertical coupling cells has the firing sequence C1, C1, C4, C4. By staggering the sequence of the horizontal coupling cells, successive discharges of a cell during the erase cycle are avoided and the coupling cell's wall voltage is allowed to come to an equilibrium value that will set up the coupling cell for the proper discharge amplitude.
  • a further reduction in the number of address circuit drivers can be achieved with an electrode connection technique that uses more sustain generators.
  • the technique shown in Fig. 2 shows that 8 rows can be addressed with 4 address drivers 56,58,60 and 62 by utilizing two Y sustain drivers 74 and 76. It is possible to use these 4 address drivers to address 16 rows if the number of Y sustain drivers is increased to 4.
  • the modifications to the circuit of Fig. 2 would involve the replication of the illustrated sustain lines for Y addresses 8 to 15 and the connection of two additional Y sustain drivers in much the same manner as Y sustain drivers 74 and 76 are connected to their respective sustain pairs. Each of the address driver lines would be similarly positioned between sustain line pairs.
  • Address driver 56 would be connected, in addition to electrode 48, to the electrode between Y address sustain lines 8 and 9; address driver 58 to the electrode between sustain lines 10 and 11; etc.
  • This alternative technique connects two address electrodes together along the right hand edge of the panel. By also connecting each connected address electrode pair along the left hand edge of the panel, additional redundancy could be achieved to protect against electrode breakage. Since each address electrode is connected at both ends, a single break in one address electrode of the address electrode pair will not cause any address failures because of the alternate conduction path. This technique would allow for very significant increase in panel yield beyond that already achieved by pairing the sustain electrodes. Of course, the cost of this modification is seen in a number of added cross-overs.
  • the plasma display will be addressed in the video mode which is commonly used for computer and television displays. It is also desirable for displays to be addressed in the random access mode of operation. In such a mode the display receives an address which can be used to turn a selected pixel or pixels either on or off.
  • the techniques presented here could readily be applied to a display operating in random access mode.
  • a hybrid design for an AC plasma display panel which employs concepts used in both single and double substrate panel structures.
  • all X dimension electrode s are on the upper substrate and all Y dimension electrodes are on the lower substrate.
  • the sustain generators are applied only to the Y axis of the display (lower substrate).
  • the X electrodes are used only for addressing and no sustain signals are applied thereto.
  • One advantage of this type of structure is that only the XA electrode is present on the upper glass substrate of the panel and allows a greater amount of light to be emitted than other panel constructions.
  • Fig. 10 the cross-sectional view of a single pixel region of the hybrid display of Fig. 8 is shown.
  • the actual display pixel discharge occurs between the YSa, YSb electrodes.
  • Coupling cells C1, C2, C3 and C4 exist as shown.
  • the address cell A is shown between the XAa and YAa electrodes.
  • Fig. 11 The waveforms for the operation of the display of Figs. 8 and 10 in a video mode are shown in Fig. 11. Initially, there occurs a "WRITE ROW" cycle that selects a single row of the display and sets all of the pixels in that row to the ON state. Subsequently, a two-step selective erase cycle occurs to set the appropriate pixels in that row to correspond to the data.
  • time T1 is the beginning of the right row cycle where the YSa pulse is raised high. This is a normal sustain transition that causes all ON pixels in the display to discharge.
  • a large negative pulse is applied to the selected YAa electrode. All other YA electrodes in the display remain at the initial +100 volt level.
  • This negative pulse causes coupling cell C2 to discharge because of the large voltage appearing between YSa and YAa.
  • This discharge causes wall voltage changes on the dielectrics that cover YSa and YAa with YSa acquiring a negative wall voltage and YAa, a positive wall voltage.
  • the large negative pulse on the selected YAa electrode is returned to its initial +100 volt level and simultaneously the YSb electrode is raised to 100 volts. These transitions do not cause any discharge activity because none of the cells have sufficient voltage across them.
  • the YSa electrode is returned to 0 volts.
  • the sustain transition at T4 also causes the wall voltage at coupling cell C2 to return to near its initial state which occurred before the T2 address cycle.
  • Time T5 marks the beginning of the selecttive erase cycle with a rise of YSa and the fall of YSb.
  • the sustain discharge leaves a positive wall charge on the dielectric covering the YSb electrode which will be employed during subsequent phases of the erase cycle. Note that this sustain discharge causes small wall voltage transitions in the coupling cells be cause they have common electrodes with the discharging pixel.
  • the address cell does not show significant wall voltage change at this time because the XAa and YAa electrodes do not change, and also the wall voltage in the address cell has already come to equilibrium.
  • Step 1 of the erase cycle starts at time T6 with a negative going pulse applied to the selected YA electrode. If the pixel is to be erased, then a positive 100 volt pulse is applied to the XA electrode that intersects the selected pixel. If the pixel is to remain in the ON state, then no XA pulse is applied.
  • Time T6 shows the waveforms applied when the selected pixel is to be erased.
  • the XAa and YAa pulses add across the A address cell to discharge it.
  • the XAa electrode is the anode, and its potential is nearly equal for the locations corresponding to the C1, A and C4 coupling cells. This means that plasma coupling occurs and the plasma spreads from address cell in both directions towards coupling cells C1 and C4 thereby causing negative charges to be deposited on the XAa dielectric in the regions of the C1 and C4 coupling cells.
  • the second step of the erase cycle commences at time T7.
  • the XAa and YAa pulses are returned to their initial levels of 0 volts and +100 volts respectively.
  • the YSb pulse rises to the +100 volt level which, in combination with the negative charge deposited on the XAa electrode due to plasma coupling at T6 and the previously deposited positive wall charge on the dielectric covering the YSb electrode, causes a discharge in coupling cell C4.
  • This discharge causes electrons (a negative wall voltage) to be deposited on the YSb dielectric since it is the anode for this discharge. These electrons cancel the positive charge that was on the YSb dielectric - due to the sustain discharge at T5.
  • Time T9 represents the start of a new cycle which could be either a write row cycle, a selective erase cycle, or a normal sustain cycle.
  • the display panel shown in Figs. 8 and 10 has a number of advantages. It enables the employment of high impedance address drivers; exhibits low sustain capacitance characteristics and, due to the use of paired sustain conductors, has a potentially higher panel yield. Its major negative is that it does not allow for any reduction in the number of address drivers.
  • Fig. 9 in conjunction with Figs. 12 and 13, a further embodiment of this invention will be described.
  • all Y dimension electrodes reside on one substrate whereas the X drive electrodes reside on the other substrate.
  • barriers 110, 112, and 114 are provided to prevent the spread of plasma discharges.
  • Each of the discharge pixels is noted by a dashed circle.
  • a cross-section of the display panel shown in Fig. 9 indicates the position of various coupling cells C1 - C6 and pixel discharge sites P1 and P2.
  • address cell a exists between drive electrodes YAa and XAa. Address cell A in this instance controls two display pixels P1 and P2.
  • the choice of which pixel is to be addressed is determined by the phase of the sustain voltages applied to electrodes YSa and YSb. This allows the number of Y address drivers to be reduced by a factor of 2 over the design shown in Fig. 8. In this circuit, however, the advantages gained by virtue of the provision of coupled sustain electrodes is not present.
  • Fig. 13 the waveforms are illustrated which drive the circuit of Figs. 9 and 12. These waveforms illustrate three cycles used to drive the display in a video mode. The cycles consist of a "Write Two Rows" cycle that turns on all of the pixels in two selected rows. the following two erase cycles are employed to erase pixels in each of these two rows depending on the video data.
  • the write two rows cycle begins with a rise on the YSa electrode which causes a normal sustain discharge in all of the pixels in the panel that are in the ON state.
  • a large positive pulse is placed on a single selected YA electrode and all other YA electrodes remain at 0 level.
  • the positive pulse is placed on the YAa electrode and causes a large discharge in address cell A and in coupling cells C3 and C4.
  • the discharge in coupling cells C3 and C4 cause the deposition of positive charge on the dielectric layers which cover electrodes YSb and YSa that are on either side of the YAa electrode. Since both of these electrodes are associated with pixels P1 and P2, this positive charge alters the wall voltage of these pixels. This may be seen in Fig.
  • Time T4 marks the end of the write cycle and the beginning of the erase cycle. Intervening sustain cycles may be placed between these two cycles in order for freshly written pixels to come to an equilibrium.
  • the YSa potential falls and the YSb electrodes rise causing a normal sustain transition. This places a positive charge on the dielectric covering the YSa electrodes if the associated pixel is in the ON state.
  • the positive charge on the YSa electrode of P2 will be used in the erase discharge at time T6.
  • a +100 volt level is applied to the selected row address electrode (in this case YAa) an the YSb level falls to 0. If the P2 pixel associated with the selected XAa and YAa electrodes is to be erased, then the intersecting XAa electrode goes to 0. Alternatively, if the pixel is to remain ON, then the XAa electrode remains at +100 volts.
  • the pulses on the XAa and YAa electrode cause a large discharge in the address cell A. Because of the positive charge on the dielectric covering, the YSa electrode associated with pixel P2, the potential of this dielectric is nearly equal to the potential of the dielectric covering the YAa electrode.
  • the address cell A discharge at T6 creates a plasma which couples along coupling cell C4 from the YA electrode to the YSa electrode of P2. Note that in this instance, the coupling occurs between different electrodes, as contrasted to the previously described structures wherein the coupling occurred along a single electrode.
  • This coupling deposits negative charge on the dielectric covering the YSa electrode associated with P2 and this negative charge cancels the positive charge placed there by the sustain discharge at time T5. This cancellation is an erasure of P2.
  • P1 is not influenced by this discharge because the potential of the dielectric covering the YSb electrode associated with P1 is quite negative relative to the potential covering the YA electrode. This negative potential repels the electrons and prevents plasma coupling from influencing P1 at time T6.
  • the XAa and YAa address pulses are removed and the YSa potential is raised. This results in a normal sustain discharge in all pixels in the panel that are in the ON state.
  • the discharge activity at time T8 corresponds in a similar fashion to that at T6 with the exception that during the T8 pulses, the P1 pixel is erased.
  • pixel P1 is erased by the action of the selected address cell, discharging and causing plasma coupling along the C3 coupling cell which deposits negative charge on the YSb electrode associated with pixel P1. This negative charge erases P1.
  • Time T9 the XAa and YAa address pulses are returned to their initial levels and YSb rises. This results in a normal sustain discharge in all pixels in the panel that are in the ON state. It also causes the wall voltages of the address cell to return to their initial value. There is no discharge activity in the erased pixels P1 and P2.
  • Time T10 marks the end of the erase cycle and the beginning of the next cycle.

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  • Engineering & Computer Science (AREA)
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  • Plasma & Fusion (AREA)
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  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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EP86308593A 1986-11-04 1986-11-04 Plasmaanzeigetafel mit unabhängigen Schaltungen für Entladungsschaltung und Adressierung Expired - Lifetime EP0266462B1 (de)

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EP86308593A EP0266462B1 (de) 1986-11-04 1986-11-04 Plasmaanzeigetafel mit unabhängigen Schaltungen für Entladungsschaltung und Adressierung
AT86308593T ATE96567T1 (de) 1986-11-04 1986-11-04 Plasmaanzeigetafel mit unabhaengigen schaltungen fuer entladungsschaltung und adressierung.
DE86308593T DE3689233D1 (de) 1986-11-04 1986-11-04 Plasmaanzeigetafel mit unabhängigen Schaltungen für Entladungsschaltung und Adressierung.
AU64839/86A AU600239B2 (en) 1986-11-04 1986-11-05 Independent sustain and address plasma display panel

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP0356313A1 (de) * 1988-08-26 1990-02-28 Thomson-Csf Verfahren zur sehr schnellen Ansteuerung einer wechselspannungsbetriebenen Plasmaanzeigetafel mit koplanarer Unterstützung durch halbselektive Adressierung und selektive Adressierung
FR2635901A1 (fr) * 1988-08-26 1990-03-02 Thomson Csf Procede de commande ligne par ligne d'un panneau a plasma du type alternatif a entretien coplanaire
EP0590798A1 (de) * 1992-09-29 1994-04-06 Technology Trade And Transfer Corporation Ansteuerungsverfahren für Anzeigeröhren
GB2266007B (en) * 1992-03-26 1995-10-04 Samsung Electronic Devices A plasma display panel and a driving method therefor
EP0938072A1 (de) * 1998-02-23 1999-08-25 Fujitsu Limited Verfahren zum Steuern einer Anzeigetafel
EP1116204A1 (de) * 1998-09-23 2001-07-18 Matsushita Electric Industrial Co., Ltd. Positiv-spalten wechselstromplasmaanzeige

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US3886404A (en) * 1973-02-27 1975-05-27 Mitsubishi Electric Corp Plasma display
GB2129595A (en) * 1982-10-27 1984-05-16 Western Electric Co Improvements in or relating to display devices

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US4386348A (en) * 1979-06-22 1983-05-31 Burroughs Corporation Display panel having memory
US4866349A (en) * 1986-09-25 1989-09-12 The Board Of Trustees Of The University Of Illinois Power efficient sustain drivers and address drivers for plasma panel

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US3886404A (en) * 1973-02-27 1975-05-27 Mitsubishi Electric Corp Plasma display
GB2129595A (en) * 1982-10-27 1984-05-16 Western Electric Co Improvements in or relating to display devices

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356313A1 (de) * 1988-08-26 1990-02-28 Thomson-Csf Verfahren zur sehr schnellen Ansteuerung einer wechselspannungsbetriebenen Plasmaanzeigetafel mit koplanarer Unterstützung durch halbselektive Adressierung und selektive Adressierung
FR2635902A1 (fr) * 1988-08-26 1990-03-02 Thomson Csf Procede de commande tres rapide par adressage semi-selectif et adressage selectif d'un panneau a plasma alternatif a entretien coplanaire
FR2635901A1 (fr) * 1988-08-26 1990-03-02 Thomson Csf Procede de commande ligne par ligne d'un panneau a plasma du type alternatif a entretien coplanaire
EP0357485A1 (de) * 1988-08-26 1990-03-07 Thomson-Csf Zeile-pro-Zeile-Ansteuerverfahren einer Plasmaanzeigetafel vom wechselspannungsbetriebenen Typ mit koplanarer Unterstützung
US5030888A (en) * 1988-08-26 1991-07-09 Thomson-Csf Very fast method of control by semi-selective and selective addressing of a coplanar sustaining AC type of plasma panel
US5075597A (en) * 1988-08-26 1991-12-24 Thomson-Csf Method for the row-by-row control of a coplanar sustaining ac type of plasma panel
GB2266007B (en) * 1992-03-26 1995-10-04 Samsung Electronic Devices A plasma display panel and a driving method therefor
EP0590798A1 (de) * 1992-09-29 1994-04-06 Technology Trade And Transfer Corporation Ansteuerungsverfahren für Anzeigeröhren
EP0938072A1 (de) * 1998-02-23 1999-08-25 Fujitsu Limited Verfahren zum Steuern einer Anzeigetafel
US6727869B1 (en) 1998-02-23 2004-04-27 Fujitsu Limited Display panel and its driving method
EP1116204A1 (de) * 1998-09-23 2001-07-18 Matsushita Electric Industrial Co., Ltd. Positiv-spalten wechselstromplasmaanzeige
EP1116204A4 (de) * 1998-09-23 2003-07-16 Matsushita Electric Ind Co Ltd Positiv-spalten wechselstromplasmaanzeige

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EP0266462B1 (de) 1993-10-27
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AU6483986A (en) 1988-05-12
ATE96567T1 (de) 1993-11-15

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