EP0337833A1 - Punkt für Punkt Ansteuermethode für einen Plasma-Anzeiger - Google Patents

Punkt für Punkt Ansteuermethode für einen Plasma-Anzeiger Download PDF

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Publication number
EP0337833A1
EP0337833A1 EP89400789A EP89400789A EP0337833A1 EP 0337833 A1 EP0337833 A1 EP 0337833A1 EP 89400789 A EP89400789 A EP 89400789A EP 89400789 A EP89400789 A EP 89400789A EP 0337833 A1 EP0337833 A1 EP 0337833A1
Authority
EP
European Patent Office
Prior art keywords
maintenance
yae
electrodes
voltage
addressing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89400789A
Other languages
English (en)
French (fr)
Inventor
Michel Gay
Serge Salavin
Jacques Deschamps
Michel Specty
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thomson CSF SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0337833A1 publication Critical patent/EP0337833A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • G09G3/2932—Addressed by writing selected cells that are in an OFF state
    • 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
    • G09G3/291—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

Definitions

  • the present invention relates to a point-to-point method of controlling a plasma panel. It finds an application in the display of analog, alphanumeric or other images, in color or not.
  • plasma panels occupy a privileged place today.
  • these are devices comprising two insulating slabs limiting a volume occupied by a gas (generally a neon-based mixture), these slabs supporting two families of crossed electrodes defining a matrix of image points (also called " pixels ").
  • a gas generally a neon-based mixture
  • the electrodes When the electrodes are suitably energized, an electric discharge takes place in the gas, which discharge produces an emission of light.
  • An improved plasma panel preferably includes means for maintaining the discharge.
  • these means consist of so-called maintenance electrodes, deposited in pairs on the same substrate. We then speak of plasma panels with coplanar maintenance.
  • FIGS. 1 and 2 Such a device is shown in FIGS. 1 and 2, in accordance with the teaching of the European patent document EP-A-0 135 382. It comprises a glass slab 1 covered with maintenance electrodes 2 and 3 each provided with protrusions 2a and 3a. The assembly is covered with an insulating layer 4. Writing electrodes 5 are crossed with the maintenance electrodes 2 and 3. The assembly is covered with an insulating layer 6 and a protective layer 7 in MgO. A second slab 8 completes the set. A gas 9 is retained between the slabs held apart by waterproof shims, not shown.
  • the operating principle of a plasma panel of this type is as follows: an address discharge is selectively generated at the intersection of an electrode 5 with an electrode 2. This discharge results in the storage of electric charges on the insulator covering the electrodes. These charges are then used to facilitate the initiation of maintenance discharges between the parallel and coplanar electrodes 2 and 3. These discharges, which are those which provide most of the useful light, are maintained by applying a voltage in one direction, then the other, between electrodes 2 and 3.
  • control method for such a plasma panel is of the line by line type. This means that all the points situated under the same electrode 5 are controlled. It is not possible to control the panel point by point by such a method. Such a method finds its utility in the display of video images, since it is compatible with the structure of such signals.
  • the maintenance electrodes are referenced Yi and E (there is no index i to locate the electrodes E because all the maintenance electrodes of this type receive the same voltage).
  • the addressing electrode is referenced Xj.
  • a pixel Pij is therefore defined by the two indices i and j.
  • the maintenance signal consists of a first alternately positive and negative voltage, applied to all the electrodes E, on the one hand, and a second voltage in phase opposition with the first, and applied to all the electrodes Y, on the other hand go.
  • the electrodes E are at the potential + V
  • the Yi are at the potential -V, and vice versa.
  • the -Vy pulse is not applied, so as to leave the point in the state (on or off) where it was previously.
  • This addressing method makes it possible to selectively control point by point each of the pixels. It is also compatible with a semi-selective command (line by line, or column by column).
  • the drawback is that it requires complex signals: four different voltage levels appear on the Yi electrodes, and three on the E electrode.
  • the duration of the addressing sequence is quite long , which has the effect of limiting the maximum rate of refreshment of the information on the screen.
  • FIG. 4 Another type of plasma panel, to which the method of the invention preferably applies, is represented in FIG. 4.
  • a panel is the subject, in itself, of a French patent application filed by the present applicant, on the day of filing of this application.
  • Such a panel is therefore not known, but it is described here to meet the requirements regarding the sufficiency of description.
  • the panel shown in FIG. 4 comprises a first glass slab 10 covered with a first family of electrodes denoted Xj, where j is an integer ranging from 1 to N (a single electrode Xj is shown); the slab 10-electrode Xj assembly is covered with a layer 12 of dielectric material, possibly covered with an oxide layer such as MgO (not shown) facilitating the electrical emission tronic.
  • a pellet 14 of a phosphor material that is to say capable of emitting colored radiation, under the effect of ultraviolet radiation.
  • the panel also comprises a second glass slab 20, covered with a second family of electrodes constituted by pairs of electrodes called respectively, of maintenance-addressing (Yae) i and of maintenance (Ye), where i is a integer between 1 and P.
  • the maintenance-addressing and maintenance electrodes include protuberances 22 and 24, arranged opposite one another.
  • the 20-electrode slab assembly is covered with a dielectric layer 26.
  • the two slabs 10 and 20 and their networks of electrodes are brought together and kept apart by a thickness wedge (not shown) and a gas is present in the volume between the slabs and the wedge.
  • the panel thus has two arrays of orthogonal electrodes, in the sense that the electrodes Xj are orthogonal to the electrodes (Yae) i and (Ye).
  • the electrodes Xj may overlap the protrusions 22 and 24 or be slightly offset on the side thereof.
  • a pixel Pij is then defined by an electrode Xj and a pair of maintenance electrodes (Yae) i and (Ye).
  • the object of the present invention is precisely to remedy these drawbacks by proposing a simple point-by-point control method, usable in particular (but not exclusively) for a panel such as that of FIG. 4.
  • the amplitude Vy is adjusted as a function of the amplitude Vx so that the voltage Vx + Vy is sufficient to trigger the ignition of the plasma between a control electrode (Xj) and a maintenance-addressing electrode (Yae ) i and the amplitude Ve is adjusted as a function of the amplitude Vy thus adjusted so that the voltage Vy + Ve is sufficient to maintain the ignition of the plasma between a maintenance-addressing electrode (Yae) i and the electrode of neighboring maintenance (Ye).
  • any form of addressing voltage can be used, it is preferred in practice to use rectangular voltages.
  • the voltages represented have a cyclic character of period T; intervals Ti and Te, respectively of writing and erasing, correspond to situations where the voltages V (Yae) and V (Ye) are in opposition or have the same polarity.
  • FIG 6 shows a registration phase.
  • a writing pulse Ii is applied to the electrode Xj, (line a), without modification of the other voltages (line b); it follows that the difference V (Xj) - V (Yae) i (line c) has a sudden increase which causes a discharge 30 in the gas (line d), corresponding to the front edge of the overvoltage of V (Xj) - V (Yae) i.
  • This discharge causes the appearance of charges on the electrodes, which oppose the maintenance of the discharge. But these charges are then used to maintenance of the discharge (pulses 30), as described in Figure 5, line d.
  • FIG. 7 provides a better understanding of the ignition mechanism in two phases: first inscription (a) with discharge between the electrode (Xj) and the addressing-maintenance electrode (Yae) i, then resumption of charges (b) with alternating discharges between the maintenance electrodes (Yae) i and Ye.
  • Figure 8 shows the voltages applied in the erasure phase.
  • an erase pulse Ie is applied (line a ); the other voltages V (Yae) i and V (Ye) are not modified (lines b and c ).
  • the maintenance discharges 30 of the line d will be extinguished by removal of the charges present on the addressing-maintenance electrode (Yae) i due to the application of the erasure pulse.
  • Figure 9 shows these charges during maintenance (part a ) and just after the erasure pulse (part b ). These charges are also symbolically represented in FIG. 8.
  • the status quo is ensured by the addition to V (Yae) i, during the addressing, of an impulse identical to that which is applied on Xj, either for an inscription, or for an erasure.
  • the voltage V (Yae) i applied to the addressing-maintenance electrode may have, in the erasing interval Te, an intermediate plateau between + Vy and -Vy.
  • the method of the invention essentially consists of a method of selective addressing of pixels, but it may also be suitable for semi-selective addressing, by rows or by entire columns.
  • the lower complexity of the signals allows a simplification of the control electronics. Only three voltage levels should be supplied to the Yae electrodes, and two to the Ye electrodes. Since the addressing pulses can be the same, only one pulse generator is necessary. But, of course, if necessary, it is possible not to use identical addressing voltages.
  • the duration of the addressing can be reduced, since it is no longer necessary to provide a special bearing, as in the prior art. This results in faster access possibilities.
  • FIG. 10 schematically illustrates a plasma panel display screen and its control means according to the invention.
  • the panel referenced 40 has its control electrodes Xj connected to a circuit 42 to N outputs (j taking all the integer values going from 1 to N), its addressing-maintenance electrodes (Yae) i joined to an addressing circuit 44 to P outputs (i taking all the integer values going from 1 to P), and its electrodes Ye all connected to a generator 46.
  • the information to be displayed is addressed by an input connection 48 to a decoder 50 which delivers SDX decoding signals addressed to circuit 42 and signals from SDY decoding addressed to circuit 44.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)
EP89400789A 1988-03-25 1989-03-21 Punkt für Punkt Ansteuermethode für einen Plasma-Anzeiger Withdrawn EP0337833A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8803954 1988-03-25
FR8803954A FR2629245A1 (fr) 1988-03-25 1988-03-25 Procede de commande point par point d'un panneau a plasma

Publications (1)

Publication Number Publication Date
EP0337833A1 true EP0337833A1 (de) 1989-10-18

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EP89400789A Withdrawn EP0337833A1 (de) 1988-03-25 1989-03-21 Punkt für Punkt Ansteuermethode für einen Plasma-Anzeiger

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EP (1) EP0337833A1 (de)
JP (1) JPH02230185A (de)
FR (1) FR2629245A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709365A1 (fr) * 1993-08-23 1995-03-03 Samsung Display Devices Co Ltd Procédé de pilotage d'un tableau d'affichage à plasma.
EP0615221A3 (en) * 1993-03-12 1995-11-29 Pioneer Electronic Corp Driving apparatus of plasma display panel.
FR2744275A1 (fr) * 1996-01-30 1997-08-01 Thomson Csf Procede de commande d'un panneau de visualisation et dispositif de visualisation utilisant ce procede
EP0905671A1 (de) * 1997-09-30 1999-03-31 Matsushita Electric Industrial Co., Ltd. Verfahren zur Ansteuerung einer Plasma-Anzeigetafel
EP1970882A1 (de) 1996-04-03 2008-09-17 Hitachi Plasma Patent Licensing Co., Ltd. Plasmaanzeigetafel vom Oberflächenentladungstyp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100577158B1 (ko) * 1999-05-10 2006-05-10 엘지전자 주식회사 고주파를 이용한 플라즈마 디스플레이 패널의 구동방법 및 장치
JP3471782B2 (ja) * 2001-02-13 2003-12-02 Ｎｅｃ液晶テクノロジー株式会社 平面型蛍光ランプユニット及びそれを用いた液晶表示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044182A2 (de) * 1980-07-07 1982-01-20 Interstate Electronics Corporation Plasmaanzeigesteuereinrichtung
US4342993A (en) * 1979-08-09 1982-08-03 Burroughs Corporation Memory display panel
GB2129595A (en) * 1982-10-27 1984-05-16 Western Electric Co Improvements in or relating to display devices
EP0135382A1 (de) * 1983-08-24 1985-03-27 Fujitsu Limited Gasentladungsanzeigevorrichtung und Verfahren zum Betreiben einer derartigen Vorrichtung
EP0157248A2 (de) * 1984-03-19 1985-10-09 Fujitsu Limited Verfahren zur Steuerung einer Gasentladungsanzeigevorrichtung
US4591847A (en) * 1969-12-15 1986-05-27 International Business Machines Corporation Method and apparatus for gas display panel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591847A (en) * 1969-12-15 1986-05-27 International Business Machines Corporation Method and apparatus for gas display panel
US4342993A (en) * 1979-08-09 1982-08-03 Burroughs Corporation Memory display panel
EP0044182A2 (de) * 1980-07-07 1982-01-20 Interstate Electronics Corporation Plasmaanzeigesteuereinrichtung
GB2129595A (en) * 1982-10-27 1984-05-16 Western Electric Co Improvements in or relating to display devices
EP0135382A1 (de) * 1983-08-24 1985-03-27 Fujitsu Limited Gasentladungsanzeigevorrichtung und Verfahren zum Betreiben einer derartigen Vorrichtung
EP0157248A2 (de) * 1984-03-19 1985-10-09 Fujitsu Limited Verfahren zur Steuerung einer Gasentladungsanzeigevorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON ELECTRON DEVICES *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615221A3 (en) * 1993-03-12 1995-11-29 Pioneer Electronic Corp Driving apparatus of plasma display panel.
FR2709365A1 (fr) * 1993-08-23 1995-03-03 Samsung Display Devices Co Ltd Procédé de pilotage d'un tableau d'affichage à plasma.
FR2744275A1 (fr) * 1996-01-30 1997-08-01 Thomson Csf Procede de commande d'un panneau de visualisation et dispositif de visualisation utilisant ce procede
WO1997028526A1 (fr) * 1996-01-30 1997-08-07 Thomson-Csf Procede de commande d'un panneau de visualisation et dispositif de visualisation utilsant ce procede
US6191763B1 (en) 1996-01-30 2001-02-20 Thomson-Csf Process for controlling a display panel and display device using this process
EP1970882A1 (de) 1996-04-03 2008-09-17 Hitachi Plasma Patent Licensing Co., Ltd. Plasmaanzeigetafel vom Oberflächenentladungstyp
US7495636B2 (en) 1996-04-03 2009-02-24 Hitachi Plasma Patent Licensing Co., Ltd. Surface discharge type plasma display panel divided into a plurality of sub-screens
US8044888B2 (en) 1996-04-03 2011-10-25 Hitachi Plasma Patent Licensing Co., Ltd. Surface discharge type plasma display panel divided into a plurality of sub-screens
EP0905671A1 (de) * 1997-09-30 1999-03-31 Matsushita Electric Industrial Co., Ltd. Verfahren zur Ansteuerung einer Plasma-Anzeigetafel
US6198463B1 (en) 1997-09-30 2001-03-06 Matsushita Electric Industrial Co., Ltd. Method for driving AC-type plasma display panel

Also Published As

Publication number Publication date
JPH02230185A (ja) 1990-09-12
FR2629245A1 (fr) 1989-09-29

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