EP0033090A2 - Dispositif d'affichage à décharge dans les gaz - Google Patents

Dispositif d'affichage à décharge dans les gaz Download PDF

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Publication number
EP0033090A2
EP0033090A2 EP81100233A EP81100233A EP0033090A2 EP 0033090 A2 EP0033090 A2 EP 0033090A2 EP 81100233 A EP81100233 A EP 81100233A EP 81100233 A EP81100233 A EP 81100233A EP 0033090 A2 EP0033090 A2 EP 0033090A2
Authority
EP
European Patent Office
Prior art keywords
gas
display device
gas discharge
helium
discharge
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Withdrawn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
EP81100233A
Other languages
German (de)
English (en)
Other versions
EP0033090A3 (fr
Inventor
David Dr. Branston
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0033090A2 publication Critical patent/EP0033090A2/fr
Publication of EP0033090A3 publication Critical patent/EP0033090A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/20—Selection of substances for gas fillings; Specified operating pressures or temperatures
    • 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

Definitions

  • the invention relates to a gas discharge display device with a gas discharge space which is separated by a hole matrix with control electrodes arranged in rows and columns from an electron acceleration space which is closed off by a screen.
  • a known gas discharge display device contains a matrix of gas discharge cells, to which auxiliary anodes arranged in rows and control electrodes arranged in columns are assigned.
  • the gas discharge takes place in a gas discharge space between a cathode and the auxiliary anodes. Between the control electrodes and the anode in an electron acceleration space, the electrons are accelerated by an applied high voltage.
  • the hole matrix formed from an insulating material plate divides the common discharge path into an auxiliary discharge space with a relatively large length for operation with a low voltage for the gas discharge current and a second space with a short path length and high field strength for electron acceleration.
  • the hole matrix made of insulating material serves as a carrier for the auxiliary anodes assigned to the rows of the matrix.
  • control electrodes for brightness control can be arranged on the opposite flat side of the matrix.
  • the electrodes formed in the line-controlled auxiliary glow discharge and moved towards the auxiliary anode become in the downstream discharge path of high field strength by the correspondingly divided control elec trode accelerated and mapped to the anode in a controlled manner
  • the energy of an electron in the glow discharge is between a few electron volts (eV) and the full operating voltage of the discharge, which is generally a few hundred eV.
  • the brightness is controlled by applying a negative voltage to the control electrode. All electrons with a higher energy than the control voltage can freely enter the high-voltage space and are accelerated there.
  • the number of fast electrons is smaller, the more collisions between electrons and gas molecules. Therefore, the distance between the auxiliary anodes and the negative glow light, the type of fill gas used and the gas pressure are the most important parameters that influence the electron energy distribution.
  • the number of impacts can be increased by the distance between the auxiliary anodes and the negative glow light and the gas pressure; on the other hand, the effectiveness of the collisions essentially depends on the cross sections of the gas.
  • the invention has for its object to increase the contrast effect of the screen.
  • all the electrons entering the acceleration space should be made usable for the image effect and at the same time the dielectric strength in the acceleration space should at least not be significantly reduced.
  • molecular gases such as hydrogen and nitrogen
  • these gases have only a relatively low dielectric strength given the gas pressure prevailing in the acceleration space and the small electrode spacing. The one with these gases achievable acceleration voltage and thus the peak brightness are limited accordingly.
  • These gases are also reactive and can therefore affect the long-term stability of the discharge or the life of the phosphors used on the anode.
  • Noble gases are not reactive, but they generally also have a relatively low dielectric strength.
  • helium has a high dielectric strength, but has low cross sections. Therefore, with helium as the filling gas, you only get a contrast ratio that does not significantly exceed 10: 1.
  • a known gas discharge display device includes a gas chamber between a pair of opposing dielectric charge storage parts with control electrodes arranged such that their crossing points each form a discrete discharge space.
  • the gas filling contains an ionized gas, to which a so-called buffer gas is added, which consists, for example, of neon or also of helium, the proportion of which is limited to approximately 50 atomic% in order to rule out an unfavorable influence on the change in brightness.
  • the helium is added to reduce the applied voltage, which is required to maintain an ignited gas discharge, and also to increase the storage limit of the arrangement (DE-OS 2 246 344).
  • the invention is based on the object, by using a gas mixture as an ionizable filling gas for a device of the type mentioned with a gas discharge path, which is separated from an electron acceleration path, a high dielectric strength and thereby a high brightness and at the same time a good contrast ratio in the flat screen to obtain.
  • the invention is based on the knowledge that the course of the Paschen curve of helium is not significantly reduced by up to about 10% despite the addition of other noble or molecular gases.
  • the additive gas does not have a great influence on the dielectric strength of the device, the energy distribution of the electrons in the glow discharge is strongly influenced by the additive.
  • the invention thus consists in that helium, to which 0.1 to 10% of at least one of the gases argon Ar, Krypton Kr, xenon Xe, nitrogen N 2 or carbon dioxide C0 2 is mixed, with a total pressure of 0, 5 to 5 m bar is used.
  • this gas composition the gas is discharged in an area of the characteristic curve that adjoins the minimum of the Paschen curve to the left. In this area of gas discharge, good contrast behavior of the display device is obtained with high dielectric strength.
  • the diagram shows the Paschen curves for helium He, hydrogen H 2 , nitrogen N 2 and xenon Xe as well Argon ar. It has been shown that, for example, with helium He as the filling gas, an addition of up to about 3% by volume of one of the other gases practically does not change the ignition characteristic shown.

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
EP81100233A 1980-01-28 1981-01-14 Dispositif d'affichage à décharge dans les gaz Withdrawn EP0033090A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3002930 1980-01-28
DE19803002930 DE3002930A1 (de) 1980-01-28 1980-01-28 Gasentladungsanzeigevorrichtung

Publications (2)

Publication Number Publication Date
EP0033090A2 true EP0033090A2 (fr) 1981-08-05
EP0033090A3 EP0033090A3 (fr) 1981-12-30

Family

ID=6093075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100233A Withdrawn EP0033090A3 (fr) 1980-01-28 1981-01-14 Dispositif d'affichage à décharge dans les gaz

Country Status (4)

Country Link
US (1) US4419605A (fr)
EP (1) EP0033090A3 (fr)
JP (1) JPS56120053A (fr)
DE (1) DE3002930A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780874A3 (fr) * 1995-12-21 1998-12-09 Tektronix, Inc. Structure d'adressage utilisant des mélanges de gaz ionisables comportant plusieurs composants ionisables
EP0739025A3 (fr) * 1995-04-19 1998-12-09 Tektronix, Inc. Structure d'adressage utilisant un mélange de gaz ionisable à faible durer le désionisation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2109628B (en) * 1981-11-16 1985-04-17 United Technologies Corp Optical display with excimer flurorescence
US4939418A (en) * 1986-03-12 1990-07-03 The United States Of America As Represented By The Secretary Of The Air Force. Gas mixture for triggerable spark gaps
JP3339554B2 (ja) 1995-12-15 2002-10-28 松下電器産業株式会社 プラズマディスプレイパネル及びその製造方法
US5998924A (en) * 1996-04-03 1999-12-07 Canon Kabushiki Kaisha Image/forming apparatus including an organic substance at low pressure
KR19990062412A (ko) * 1997-12-05 1999-07-26 손욱 헬륨 방전 디스플레이
DE19843525A1 (de) * 1998-09-23 2000-03-30 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Halogenglühlampe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2051601A (en) * 1934-03-28 1936-08-18 Gen Electric High frequency oscillator
US2203452A (en) * 1937-12-24 1940-06-04 Berghaus Electronic discharge tube
US2728004A (en) * 1948-11-16 1955-12-20 Victoreen Instr Company Glow tube
BE558655A (fr) * 1956-06-27
CA989460A (en) 1971-09-30 1976-05-18 Wolfgang W. Bode Addition of buffering agent to gaseous medium of gas discharge device
CA969595A (en) 1971-10-04 1975-06-17 Wolfgang W. Bode Conditioning of display device
US3925697A (en) * 1972-10-24 1975-12-09 Owens Illinois Inc Helium-xenon gas mixture for gas discharge device
JPS52143987A (en) * 1976-05-26 1977-11-30 Dainippon Toryo Co Ltd Gas discharge luminous eleme nt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0739025A3 (fr) * 1995-04-19 1998-12-09 Tektronix, Inc. Structure d'adressage utilisant un mélange de gaz ionisable à faible durer le désionisation
EP0780874A3 (fr) * 1995-12-21 1998-12-09 Tektronix, Inc. Structure d'adressage utilisant des mélanges de gaz ionisables comportant plusieurs composants ionisables

Also Published As

Publication number Publication date
JPS56120053A (en) 1981-09-21
DE3002930A1 (de) 1981-07-30
US4419605A (en) 1983-12-06
EP0033090A3 (fr) 1981-12-30

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Inventor name: BRANSTON, DAVID, DR.