US3866090A - Gas discharge panel and operating system - Google Patents

Gas discharge panel and operating system Download PDF

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Publication number
US3866090A
US3866090A US408401A US40840173A US3866090A US 3866090 A US3866090 A US 3866090A US 408401 A US408401 A US 408401A US 40840173 A US40840173 A US 40840173A US 3866090 A US3866090 A US 3866090A
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United States
Prior art keywords
electrodes
groups
cathode
anode
auxiliary
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Expired - Lifetime
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US408401A
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English (en)
Inventor
Gelder Zeger Van
Mathieu Martinus Mari Mattheij
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US Philips Corp
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US Philips Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current
    • H01J17/492—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with crossed electrodes
    • H01J17/494—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with crossed electrodes using sequential transfer of the discharges, e.g. of the self-scan type

Definitions

  • ABSTRACT A self-scanning gas discharge device using three electrode systems in which the electrodes of the cathode system and those of the auxiliary anode systemextend in the same direction and are interconnected in groups for obtaining as few as possible crossing interconnections between the electrodes.
  • the invention relates to a gas discharge device comprising a gas discharge panel having at least a cathode system, an auxiliary anode system and an anode system in which at least part of the electrodes of one of these systems crosses the electrodes of one of the other systems and in which at least part of-the electrodes of the cathode system is interconnected in groups, while each of a number of these groups is connected to a different output of a control circuit for automatically scanning the panel (self-scanning) by means of an auxiliary discharge extending every time along a subsequent electrode of the cathode system.
  • a gas discharge device of the kind described above is known from Electronics, 2-3-1970, pages l2l-l25 in which the anode of the cathode system cross those of the auxiliary anode system and of the anode system and are interconnected in three groups which are successively energized so that an auxiliary discharge can be displaced from cathode to cathode. All auxiliary anodes are connected to a positive voltage through a resistor. For larger panels the number of groups must be chosen to be more than three so as to provide a sufficient deionization period for the gas between two successive energizations of one and the same electrode. The number of crossings of connections to co-planar electrodes may then become undesirably large.
  • An object of the invention is to obviate this drawback.
  • a gas discharge device of the kind described in the preamble according to the invention is characterized in that at least part of the electrodes of the auxiliary anode system extends in the same direction as that of the groups of interconnected electrodes of the cathode system and are likewise interconnected in groups and that a number of these groups of the auxiliary anode system is each connected to a different output of a further control circuit while the said control circuits are mutually synchronized.
  • FIG. 1 diagrammatically shows a gas discharge device according to the invention.
  • FIG. 2 likewise diagrammatically shows a further embodiment of a gas discharge device according to the invention.
  • FIG. 3 shows a number of idealized voltage-time diagrams representing the waveforms occurring in the gas discharge device of FIG..1.
  • FIG. 4 likewise shows idealized voltage-time diagrams representing the waveforms occurring in the gas discharge device of FIG. 2.
  • a gas discharge panel 1 comprises a cathode system having a plurality of cathodes 3, 5, 7,9, 11, 13, and 17, an auxiliary anode system having a plurality of auxiliary anodes 19, 21, 23, 25, 27, 29, 31 and 33 and an anode system having a plurality of anodes 35, 37, 39, 41, 43, 45, 47 and 49.
  • the cathodes, auxiliary anodes and anodes are positioned in planes mutually spaced apart while the planes accommodating the auxiliary anodes and cathodes are on the same side of the plane accommodating the anodes.
  • the cathode 3 and the auxiliary anode 19 are starting electrodes and are connected to outputs 51, 53, respectively, of a starter circuit 55.
  • a group of cathodes 5, l1 and 13 is interconnected and is connected to an output 57 ofa control circuit 59.
  • a second group of cathodes 7, 9, 15 and 17 is interconnected and is furthermore connected to another output 61 of the control circuit 59.
  • a group of auxiliary anodes 21, 23, 29 and 31 is interconnected and is connected to an output 63 of a further control circuit 65 another output 67 of which is connected to a second group of interconnected auxiliary anodes 25, 27 and 33.
  • the starter circuit 55 and the control circuits 59 and 65 are mutually synchronized, which is denoted by connections 69 and 71.
  • the anodes 35, 37, 39, 41, 43, 45, 47 and 49 are each connected to an output of an anode control circuit 73 which has an input combination 75, 77, 79, 81 to which signals are applied which determine the image to be displayed.
  • a clock signal input 83 is also connected to a clock signal input 85 of the control circuit 65.
  • a clock signal for controlling the device is applied to input 83.
  • waveform 303 denotes the control voltage for the cathode 3
  • waveforms 305, 307, 309, 311, 313, 315 and 317 denote the control voltages for the cathodes 5, 7, 9, 11, 13, 15 and 17, respectively.
  • Waveforms 319, 321, 323, 325, 327, 329, 331 and 333 denote the control voltages for the auxiliary anodes 19; 21, 23, 25, 27, 29, 31 and 33, respectively.
  • the auxiliary anode 19 has a positive voltage and the cathode 3 has a negative voltage as as result of which an auxiliary discharge occurs between this cathode 3 and auxiliary anode 19.
  • the current is limited by a resistive layer 87 provided on the auxiliary anode 19.
  • the other auxiliary anodes also have a resistive layer which will not be mentioned explicitly every time.
  • the manner of current limitation in the auxiliary discharge may of course alternatively be-chose'n to be different;
  • a large voltage difference occurs only every four periods at a given electrode pair of cathode and auxiliary anode so that the scanning rate can be chosen to be large without scanning being disturbed.
  • the interconnections of the electrode systems may be provided on either side of the panel as is diagrammatically shown in the Figure. Conductors crossing each other then need not be present in the electrode planes.
  • a first group of cathodes may have interconnected pairs of successive cathodes and a second group of cathodes may have interconnected pairs of successive cathodes located between pairs of the first group while the auxiliary anodes may then alternately be connected to a first group and to a second group.
  • the frequency of the pulse signals at the auxiliary anodes is then double that at the cathodes.
  • interconnected pairs of successive cathodes of a first group may be alternated by a single cathode of a second group while the same connection pattern of the auxiliary anodes is used with a displacement of one electrode instead ofthe total pattern relative to the cathode connection pattern.
  • the required pulse patterns for the control then have unequal periods in which they are successively high and low and a high period is followed by two low periods, or conversely.
  • the voltage patterns at the auxiliary anodes are displaced one period relative to those at the cathodes.
  • the scanning periodicity covers only three periods in this case, thatis to say a large voltage. difference occurs every three periods'between a given cathode and a facing auxiliary anode.
  • FIG. 2 the same reference numerals have been used for corresponding components.
  • auxiliary anodes are interconnected in In groups and the cathodes are interconnected in n groupsin which in this example in 3 and n 2.
  • the groups of auxiliary anodes are connected to outputs 89, 91, 93 of the first control circuit 59 and the groups of interconnected cathodes are connected to outputs 95, 97 of the second control circuit 65.
  • FIG. 4 shows the voltage waveforms at the cathodes 3, 5, 7, 9, 11 and 13 by means of the reference numerals 403, 405, 407, 409, 411 and 413, respectively, and those at the auxiliary anodes 19, 21, 25, 27, 29 and. 31 by means of the reference numerals 419, 421, 425, 42 7, 429 565431, respectively.
  • auxiliary discharge is also taken over from period'to period by a subsequent cathode and auxiliary anode as is shown by the shaded area of the relevant parts of the voltage waveforms.
  • the periodicity is m x n in this system of interconnections, that is to say only after m x n periods a large voltage difference relative tothe auxiliary anode occurs at this auxiliary anode facing a given cathode.
  • This scanning system is thus suitable for very large panels.
  • the main discharge trajectory between the anode and the cathode has been left out of consideration in the foregoing because this is not important to an understanding of the invention.
  • the main discharge may be ignited in known manner at a desired point of intersection of the auxiliary discharge with an anode when the relevant anode receives a sufficiently high voltage.
  • the main discharge is extinguished when the auxiliary discharge is displaced to the next cathode-auxiliary anode pair.
  • a gas discharge device comprising a gas discharge panel including a matrix of gas cells, a cathode system including a plurality of parallel spaced electrodes, an auxiliary anode system and an anode system each comprising a plurality of parallel spaced electrodes in which at least part of the electrodes of one of these systems crosses the electrodes of one of the other systems, means for interconnecting at least part of the electrodes of the cathode system in groups, means for connecting each ofa number of these groups to a different output of a line scanning control circuit for automatically scanning the panel line by line by means of an auxiliary discharge extending'every time along a subsequent electrode of the cathode system, and wherein at least part of the electrodes of the auxiliary anode system extends in the same direction as that of the groups of interconnected electrodes of the cathodesystem and are likewise interconnected in at least two groups, means for connecting each of a number of these electrode groups of the auxiliary anode system to a different output of a second control circuit, a
  • a gas discharge device as claimed in'claim 1 characterized in that the electrodes of each of the two electrode systems of interconnected electrodes'ar'e connected in two groups per electrode system.
  • a gas discharge device as claimed in claim 1 characterized in that the electrodes of one of the electrode systems interconnected in groups are connected in' n groups and thosev of the other are connected in m groups in which in n z 2 and that a scanning rate obtained by the line scanning control circuit is the same from group to group for both electrode systemsf 5.
  • a display device comprising a generally planar matrix of gas discharge cells, a cathode system including a plurality of parallel spaced cathode electrodes arranged adjacent said matrix of gas cells, an auxiliary anode system and an anode system comprising a plurality of parallel spaced auxiliary anode electrodes and a plurality of parallel spaced anode electrodes, respectively, arranged adjacent said matrix of gas cells such that the electrodes of one of these systems crosses the electrodes of one of the other systems to form a matrix, means for interconnecting at least some of the electrodes of the cathode system in separate groups, means for interconnecting at least some of the electrodes ofthe auxiliary anode system in separate groups.
  • line scanning control means with separate output terminals connected to respective groups of cathode electrodes for selectively energizing the groups of cathode electrodes in mutually exclusive time intervals to produce a line by line scanning of the gas cell matrix
  • first control means with separate output terminals connected to respective groups of auxiliary anode electrodes for selectively energizing the groups of auxiliary anode electrodes
  • second control means for selectively energizing the anode electrodes in accordance with electric signals representative of the information to be displayed, and means for synchronizing the operation of said first, second and line scanning control means.
  • a display device as claimed in claim 5 wherein the cathode, auxiliary anode and anode electrodes are arranged in separate parallel planes so that the planes of the auxiliary anode and cathode electrodes are on the same side of the plane of the anode electrodes.

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Electrotherapy Devices (AREA)
US408401A 1972-10-31 1973-10-23 Gas discharge panel and operating system Expired - Lifetime US3866090A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7214702A NL7214702A (enrdf_load_stackoverflow) 1972-10-31 1972-10-31

Publications (1)

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US3866090A true US3866090A (en) 1975-02-11

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US408401A Expired - Lifetime US3866090A (en) 1972-10-31 1973-10-23 Gas discharge panel and operating system

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US (1) US3866090A (enrdf_load_stackoverflow)
JP (1) JPS4979119A (enrdf_load_stackoverflow)
CA (1) CA991238A (enrdf_load_stackoverflow)
DE (1) DE2351074A1 (enrdf_load_stackoverflow)
FR (1) FR2204880B1 (enrdf_load_stackoverflow)
GB (1) GB1395136A (enrdf_load_stackoverflow)
IT (1) IT996892B (enrdf_load_stackoverflow)
NL (1) NL7214702A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975725A (en) * 1973-12-26 1976-08-17 Burroughs Corporation Display panel and system for operating the same
US4017759A (en) * 1975-07-31 1977-04-12 Burroughs Corporation Display panel for displaying a bar of light
US4021851A (en) * 1974-07-08 1977-05-03 Le Coquil Emile F Writing head for facsimile image reproduction
FR2511530A1 (fr) * 1981-08-17 1983-02-18 Sony Corp Dispositif d'affichage a decharge
USRE31928E (en) * 1975-07-31 1985-06-25 Burroughs Corporation Display panel for displaying a bar of light
US4554537A (en) * 1982-10-27 1985-11-19 At&T Bell Laboratories Gas plasma display
US5684499A (en) * 1993-11-29 1997-11-04 Nec Corporation Method of driving plasma display panel having improved operational margin
US6271811B1 (en) 1999-03-12 2001-08-07 Nec Corporation Method of driving plasma display panel having improved operational margin

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701924A (en) * 1970-08-17 1972-10-31 Burroughs Corp System for operating a display panel
US3725731A (en) * 1971-06-29 1973-04-03 Ibm Self-scanning plasma display device with phosphor screen
US3778673A (en) * 1971-06-21 1973-12-11 Burroughs Corp Low power display driver having brightness control
US3789265A (en) * 1971-10-04 1974-01-29 Burroughs Corp Display panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701924A (en) * 1970-08-17 1972-10-31 Burroughs Corp System for operating a display panel
US3778673A (en) * 1971-06-21 1973-12-11 Burroughs Corp Low power display driver having brightness control
US3725731A (en) * 1971-06-29 1973-04-03 Ibm Self-scanning plasma display device with phosphor screen
US3789265A (en) * 1971-10-04 1974-01-29 Burroughs Corp Display panel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975725A (en) * 1973-12-26 1976-08-17 Burroughs Corporation Display panel and system for operating the same
US4021851A (en) * 1974-07-08 1977-05-03 Le Coquil Emile F Writing head for facsimile image reproduction
US4017759A (en) * 1975-07-31 1977-04-12 Burroughs Corporation Display panel for displaying a bar of light
USRE31928E (en) * 1975-07-31 1985-06-25 Burroughs Corporation Display panel for displaying a bar of light
FR2511530A1 (fr) * 1981-08-17 1983-02-18 Sony Corp Dispositif d'affichage a decharge
US4554537A (en) * 1982-10-27 1985-11-19 At&T Bell Laboratories Gas plasma display
US5684499A (en) * 1993-11-29 1997-11-04 Nec Corporation Method of driving plasma display panel having improved operational margin
US5903245A (en) * 1993-11-29 1999-05-11 Nec Corporation Method of driving plasma display panel having improved operational margin
US6271811B1 (en) 1999-03-12 2001-08-07 Nec Corporation Method of driving plasma display panel having improved operational margin

Also Published As

Publication number Publication date
AU6181373A (en) 1975-05-01
IT996892B (it) 1975-12-10
NL7214702A (enrdf_load_stackoverflow) 1974-05-02
FR2204880A1 (enrdf_load_stackoverflow) 1974-05-24
DE2351074A1 (de) 1974-05-09
CA991238A (en) 1976-06-15
FR2204880B1 (enrdf_load_stackoverflow) 1978-06-30
GB1395136A (en) 1975-05-21
JPS4979119A (enrdf_load_stackoverflow) 1974-07-31

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