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EP0012921B1 - Dispositif plat d'affichage par decharge dans un gaz - Google Patents

Dispositif plat d'affichage par decharge dans un gaz Download PDF

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Publication number
EP0012921B1
EP0012921B1 EP79105079A EP79105079A EP0012921B1 EP 0012921 B1 EP0012921 B1 EP 0012921B1 EP 79105079 A EP79105079 A EP 79105079A EP 79105079 A EP79105079 A EP 79105079A EP 0012921 B1 EP0012921 B1 EP 0012921B1
Authority
EP
European Patent Office
Prior art keywords
gas discharge
display device
plate
discharge display
layer
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.)
Expired
Application number
EP79105079A
Other languages
German (de)
English (en)
Other versions
EP0012921A1 (fr
Inventor
Hans Peter Dr. Rer. Nat. Lorenz
Rolf Dr. Rer. Nat. Wengert
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Priority to AT79105079T priority Critical patent/ATE2363T1/de
Publication of EP0012921A1 publication Critical patent/EP0012921A1/fr
Application granted granted Critical
Publication of EP0012921B1 publication Critical patent/EP0012921B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2278—Application of light absorbing material, e.g. between the luminescent areas

Definitions

  • the invention relates to a flat gas discharge display device according to the preamble of claim 1.
  • Image display devices with a flat screen such as are known in particular according to the principle of gas discharge display as a plasma panel or plasma display and are described, for example, in DE-OS 24 12 869, require a luminescent screen with one or more colors and with a high luminous efficacy.
  • a plasma serves as the actual cathode, from which an electron beam is drawn via a control perforated plate with matrix control for each illuminated spot to be excited.
  • the electron beams are low-energy in gas discharge display devices. Due to the flat design, high acceleration voltages are not possible. It is therefore extremely important to get a high luminous efficacy when converting the electron energy into light or when generating light in the luminous dots, for example through UV radiation.
  • FR-PS 22 78 152 shows a gas discharge display device in which a separate plasma space is assigned to each pixel. This plasma room has conical walls covered with fluorescent material. There is no post-acceleration of electrons there, the light yield is low, in particular because only the plasma particles generated in the very small space between the glass plate on the observer side and the phosphor layer can reach the phosphor and excite it.
  • the present invention has for its object to provide a luminescent screen with black-rimmed luminous dots high yield and color purity without the measures adversely affect the energy source causing the light.
  • the active fluorescent surface can be considerably enlarged or better utilized compared to the pure illuminated dot surface. More electrons reach fluorescent particles that emit their light in all directions, including forward. The amount of light emitted towards the front becomes significantly larger per luminous point than if only one fluorescent surface corresponding to the luminous point and only lying in the luminous point plane is used.
  • the perforated plate separates the illuminated dots from each other. No electrons scattered at one luminous point can reach an adjacent luminous point. This decoupling of the luminous dots considerably improves the contrast and color purity compared to purely flat screen arrangements. Reflected electrons also contribute to increasing the luminous efficiency when they hit additional phosphor layers of the same color.
  • a further increase in the luminous efficacy is achieved by metallizing the perforated walls, i.e. at the locations of the perforated walls where the additional layer of fluorescent material is attached, between the wall and the fluorescent layer.
  • the proportion of light emitted by the phosphor in the direction of the perforated wall is at least partially reflected in the direction of the screen glass.
  • the holes advantageously widen toward the screen glass side and thereby form a mirror for the light component emitted towards the rear, ie into the holes, which largely reflects the light towards the front.
  • the metallization of the perforated walls also extends to the connecting surfaces of the perforated plate with the black border layer, so that a coherent, electrically conductive layer arises. Then the entire metallization can be used as an electrode for the impinging electrons.
  • the metallization takes place before the perforated plate is applied, for example by a cathode sputtering process, by vapor deposition, a defined metallization depth into the holes being achieved by a certain vapor deposition angle, by chemical vapor deposition or by electroless deposition in the liquid phase.
  • the metallization of the perforated plate is set to a potential which firstly allows enough electrons to strike the wall and thus the fluorescent substance located there, secondly, to prevent charging effects, the electrons are discharged, and thirdly enough electrons for them leaves the phosphor layer sitting on the screen glass, ie does not impair the function of the acceleration anode lying between the phosphor layer and the screen glass.
  • the perforated plate is preferably made of glass and is melted onto the black border layer. An intermediate metallization does not affect this connection. The use of a suitable ceramic material is also possible.
  • the perforated plate is so strong that it serves as a spacer between the screen glass plate and the control perforated plate used in a gas discharge display device. Even in the case where the perforated plate is only used as a base for any further plates or elements as a spacer between the screen glass plate and the control perforated plate, it enables an exact spacing in which the fluorescent layers are protected.
  • 1 denotes a screen glass as the front pane of a flat gas discharge image display device.
  • conductive layer 2 made of doped indium oxide as an acceleration anode for the electron beams drawn from the gas discharge (indicated by arrows).
  • black border layer 3 in the form of a grid, which leaves the surfaces 4 free for luminous dots.
  • perforated plate 5 On the black border layer 3 there is a perforated plate 5, which has through-holes 6 above the grid openings 4 of the black border layer 3.
  • the further structure can be seen from the sectional view of FIG. 2.
  • fluorescent layers as luminous dots, which extend further into the walls of the holes 6 up to approximately two thirds of the depth.
  • a metallization layer 8 which also extends to the walls of the holes 6 and comes to rest there between the phosphor layers 7 and the perforated walls of the perforated plate 5.
  • This arrangement of a fluorescent screen according to the invention is produced, for example, as follows: A glass solder grating is applied as a black border 3 to the screen glass 1.
  • glass solder is slurried with a so-called "black dye” additive made from various metal oxides with methyl glycol acetate, spray thinner and photo lacquer, sprayed over the entire surface and, after drying, exposed with masks of the appropriate three-color grid for color television, then developed and dried.
  • a black border as a common expression means an opaque border.
  • a 1 mm thick glass pane is used as the perforated plate 5, the outer dimensions of which correspond to those of the screen glass 1.
  • the holes have either been created using classic glass etching processes or by means of a photo process, as is used, for example, in the commercially available photo-shaped glass.
  • the metallization is carried out by evaporating a 100 nm thick Al layer 8 in a high vacuum.
  • the holes 6 are vapor-coated with aluminum to a depth of approximately 0.2 mm. With a perforated area of approx. 0.2 x 0.5 mm 2, the «active» area is quadrupled.
  • Screen glass 1 and perforated plate 5 are sintered together after adjustment, the pre-dried glass solder grid of black border 3 applied to screen glass 1 serving as solder.
  • FIG 3 shows the embodiment in which the holes 6 of the glass plate 5 are widened toward the screen glass 1 and carry a metallization layer 8, the phosphor layer 7 is pulled up to the metallization 8 of the perforated walls and the expansion is approximately parabolic by appropriate etching, so that 8 parabolic mirrors can be removed with the metallization.
  • Fig. 4 shows a further modified hole shape
  • the holes 6 of the perforated plate 5 are formed by etching on both sides and are thus open on both sides. They are approximately double-cone-shaped, the cone open towards the screen glass 1 carrying the metallization 8 and the phosphor layer 7.
  • the two-sided expansion of the holes 6 has the advantage that the cone walls can be kept steeper without the electron-side opening of the holes 6 becoming too narrow. This is particularly advantageous if the perforated plate 5 is so thick that it serves as a spacer between the screen glass 1 and the control perforated plate of the gas discharge display device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Claims (7)

1. Dispositif plat d'affichage par décharge dans un gaz, comportant un plasma servant de cathode, une plaque perforée de commande à attaque matricielle pour chaque point luminescent à exciter sur un écran luminescent, une anode accélératrice à laquelle est appliquée une tension accélératrice appropriée pour produire un faisceau d'électrons et des points lumineux séparés entre eux par une bordure noire, remarquable par les caractéristiques suivantes :
a) sur la face intérieure de l'écran luminescent, une plaque de verre-écran (1) porte au-dessus de la couche de bordure noire (3) une plaque perforée (5) qui possède au-dessus de chaque point luminescent un trou (6) ;
b) les parois des trous (6) de la plaque portent au moins sur une partie de la paroi qui est voisine de la plaque de verre-écran (1) une couche de substance luminescente qui grimpe sur les parois des trous sous la forme d'un élargissement des points de substance luminescente déposée sur la plaque de verre-écran (1), sous les trous (6) de la plaque.
2. Dispositif d'affichage par décharge dans un gaz selon la revendication 1, caractérisé par le fait que les trous (6) de la plaque s'élargissent en direction de la face du verre-écran.
3. Dispositif d'affichage à décharge dans un gaz selon la revendication 2, caractérisé par le fait que sur les élargissements des trous (6) de la plaque sont prévues d'abord une métallisation (8) et ensuite une couche de substance luminescente (7).
4. Dispositif d'affichage par décharge dans un gaz selon la revendication 3, caractérisé par le fait que l'élargissement, avec la métallisation (8), forme à peu près un miroir parabolique.
5. Dispositif d'affichage par décharge dans un gaz selon l'une des revendications 3 ou 4, caractérisé par le fait que la métallisation (8) des parois des trous s'étend également sur la surface de liaison de la plaque perforée (8) avec la couche de bordure noire (3), en sorte qu'il se forme une couche électriquement conductrice d'un seul tenant.
6. Dispositif d'affichage par décharge dans un gaz selon l'une des revendications 1 à 5, caractérisé par le fait que la plaque perforée (5) est faite avec du verre et qu'elle est fixée par fusion sur la couche de bordure noire (3).
7. Dispositif d'affichage par décharge dans un gaz selon l'une des revendications 1 à 6, caractérisé par le fait que la plaque perforée a une épaisseur telle qu'elle sert d'entretoise entre la plaque de verre-écran (1) et la plaque perforée de commande utilisée dans un dispositif d'affichage par décharge dans un gaz.
EP79105079A 1978-12-20 1979-12-10 Dispositif plat d'affichage par decharge dans un gaz Expired EP0012921B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79105079T ATE2363T1 (de) 1978-12-20 1979-12-10 Flaches gasentladungsanzeigegeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2855090 1978-12-20
DE2855090A DE2855090C2 (de) 1978-12-20 1978-12-20 Leuchtschirm für flache Bildanzeigegeräte

Publications (2)

Publication Number Publication Date
EP0012921A1 EP0012921A1 (fr) 1980-07-09
EP0012921B1 true EP0012921B1 (fr) 1983-01-26

Family

ID=6057789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79105079A Expired EP0012921B1 (fr) 1978-12-20 1979-12-10 Dispositif plat d'affichage par decharge dans un gaz

Country Status (5)

Country Link
US (1) US4352042A (fr)
EP (1) EP0012921B1 (fr)
JP (1) JPS5588244A (fr)
AT (1) ATE2363T1 (fr)
DE (1) DE2855090C2 (fr)

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US5086297A (en) * 1988-06-14 1992-02-04 Dai Nippon Insatsu Kabushiki Kaisha Plasma display panel and method of forming fluorescent screen thereof
US4853590A (en) * 1988-08-01 1989-08-01 Bell Communications Research, Inc. Suspended-electrode plasma display devices
JP2964512B2 (ja) * 1989-12-18 1999-10-18 日本電気株式会社 カラープラズマディスプレイ
GB2254486B (en) * 1991-03-06 1995-01-18 Sony Corp Flat image-display apparatus
DE69325123T2 (de) * 1992-03-23 1999-11-18 Koninklijke Philips Electronics N.V., Eindhoven Verfahren zum Herstellen einer Platte aus einem elektrisch isolierenden Material mit einem Muster von Löchern oder Hohlräumen zum Gebrauch in Wiedergabeanordungen
US5734224A (en) * 1993-11-01 1998-03-31 Canon Kabushiki Kaisha Image forming apparatus and method of manufacturing the same
US5455489A (en) * 1994-04-11 1995-10-03 Bhargava; Rameshwar N. Displays comprising doped nanocrystal phosphors
KR950034365A (ko) * 1994-05-24 1995-12-28 윌리엄 이. 힐러 평판 디스플레이의 애노드 플레이트 및 이의 제조 방법
EP0700752B1 (fr) * 1994-09-06 1998-08-19 Koninklijke Philips Electronics N.V. Procédé pour réaliser un motif dans une couche se trouvant sur un substrat
JPH08138559A (ja) * 1994-11-11 1996-05-31 Hitachi Ltd プラズマディスプレイ装置
US5608285A (en) * 1995-05-25 1997-03-04 Texas Instruments Incorporated Black matrix sog as an interlevel dielectric in a field emission device
US5577943A (en) * 1995-05-25 1996-11-26 Texas Instruments Inc. Method for fabricating a field emission device having black matrix SOG as an interlevel dielectric
DE69722664T2 (de) * 1996-09-18 2003-12-18 Matsushita Electric Industrial Co., Ltd. Herstellungsverfahren einer Plasmaanzeigetafel, geeignet für winzige Zellstrukturen, und Plasmaanzeigetafel
KR100476043B1 (ko) * 1999-06-21 2005-03-10 비오이 하이디스 테크놀로지 주식회사 전계 방출 표시 소자 및 그 제조방법
US6515419B1 (en) * 1999-07-23 2003-02-04 Lg Electronics Inc. Plasma display panel with barriers and electrodes having different widths depending on the discharge cell
US6653777B1 (en) * 1999-11-24 2003-11-25 Canon Kabushiki Kaisha Image display apparatus
JP3989209B2 (ja) * 2001-09-12 2007-10-10 篠田プラズマ株式会社 ガス放電管及びそれを用いた表示装置
JP4098121B2 (ja) * 2003-03-03 2008-06-11 株式会社日立製作所 平面型表示装置
KR100607968B1 (ko) * 2004-04-27 2006-08-03 삼성전자주식회사 플라즈마 디스플레이 패널
KR20060059747A (ko) * 2004-11-29 2006-06-02 삼성에스디아이 주식회사 전자방출 표시장치
CN117693781A (zh) * 2021-07-16 2024-03-12 索尼集团公司 显示系统

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Also Published As

Publication number Publication date
DE2855090C2 (de) 1980-09-18
DE2855090B1 (de) 1980-01-24
EP0012921A1 (fr) 1980-07-09
ATE2363T1 (de) 1983-02-15
US4352042A (en) 1982-09-28
JPS5588244A (en) 1980-07-03

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