EP0550103B1 - Flaches Bildschirmanzeigegerät mit Elektronentransportkanälen und einer doppelten Auswahlstruktur - Google Patents

Flaches Bildschirmanzeigegerät mit Elektronentransportkanälen und einer doppelten Auswahlstruktur Download PDF

Info

Publication number
EP0550103B1
EP0550103B1 EP19920204006 EP92204006A EP0550103B1 EP 0550103 B1 EP0550103 B1 EP 0550103B1 EP 19920204006 EP19920204006 EP 19920204006 EP 92204006 A EP92204006 A EP 92204006A EP 0550103 B1 EP0550103 B1 EP 0550103B1
Authority
EP
European Patent Office
Prior art keywords
apertures
selection
extraction
plate
preselection
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 - Lifetime
Application number
EP19920204006
Other languages
English (en)
French (fr)
Other versions
EP0550103A1 (de
Inventor
Gerardus Gregorius Petrus Van Gorkum
Siebe Tjerk De Zwart
Petrus Hubertus Franciscus Trompenaars
Nicolaas Lambert
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP0550103A1 publication Critical patent/EP0550103A1/de
Application granted granted Critical
Publication of EP0550103B1 publication Critical patent/EP0550103B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123—Flat display tubes
    • H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
    • H01J31/126—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using line sources

Definitions

  • the invention relates to a picture display device having a vacuum envelope which is provided with a transparent face plate bearing a luminescent screen having a multiplicity of predefined areas (pixels) and with a rear plate, said display device comprising a plurality of juxtaposed sources for emitting electrons, a plurality of electron current transport ducts cooperating with the sources and extending substantially parallel to the face plate and an active selection structure for selectively extracting electron currents from the transport ducts and for directing said currents towards pixels of the luminescent screen.
  • the display device described above is of the flat-panel type, as disclosed in EP-A-400 750 and EP-A-436 997.
  • Display devices of the flat-panel type are devices having a transparent face plate and, arranged at a small distance therefrom, a rear plate, which plates e.g. are interconnected by means of side walls and in which the inner side of the face plate is provided with pixels in the form of a phosphor pattern, one side of which is provided with an electrically conducting coating (the combination generally being referred to as luminescent screen). If (video information-controlled) electrons impinge upon the luminescent screen, a visual image is formed which is visible via the front side of the face plate.
  • the face plate may be flat or, if desired, curved (for example, spherical or cylindrical).
  • the known display device comprises a plurality of juxtaposed sources for emitting electrons, local electron transport ducts cooperating with the sources and each having walls of high-ohmic, electrically substantially insulating material having a secondary emission coefficient suitable for transporting emitted electrons in the form of electron currents and colour selection means comprising selectively energizable electrodes (selection electrodes) for withdrawing each electron current from its transport duct at predetermined extraction locations facing the luminescent screen, further means being provided for directing extracted electrons towards pixels of the luminescent screen for producing a picture composed of pixels.
  • the operation of the known picture display device is based on the recognition that electron transport is possible when electrons impinge on an inner wall of an elongate evacuated cavity (referred to as "compartment") defined by walls of a high-ohmic, electrically substantially insulating material (for example, glass or synthetic material), if an electric field of sufficient power is generated in the longitudinal direction of the "compartment” (by applying an electric potential difference across the ends of the "compartment”).
  • the impinging electrons then generate secondary electrons by wall interaction, which electrons are attracted to a further wall section and in their turn generate secondary electrons again by wall interaction.
  • the circumstances field strength E, electrical resistance of the walls, secondary emission coefficient ⁇ of the walls
  • a flat-panel picture display device can be realised by providing each one of a plurality of juxtaposed "compartments", which constitute transport ducts, with a column of extraction apertures at a side which is to face a display screen. It will then be practical to arrange the extraction apertures of adjacent transport ducts along parallel lines extending transversely to the transport ducts.
  • selection electrodes arranged in rows By adding selection electrodes arranged in rows to the arrangement of apertures, which selection electrodes are energizable by means of a first (positive) electric voltage (pulse) for withdrawing electron currents from the "compartments” via the apertures of a row, or which are energizable by means of a second (lower) electric voltage if no electrons are to be locally withdrawn from the "compartments", an addressing means is provided with which electrons withdrawn from the "compartments" can be directed towards the screen for producing a picture composed of pixels by activating the pixels.
  • pulse positive electric voltage
  • the display device comprises a preselection structure having extraction locations which can be activated and communicate row by row with the transport ducts and a selection plate having apertures which can be activated and are each associated with a pixel, each activatable extraction location of the preselection structure being associated with at least two activatable apertures of the selection plate, and in that means for intercepting unwanted electrons are arranged between each extraction location and the associated selection apertures.
  • EP-A-0 464 937 falling within the terms of Article 54(3) EPC, and EP-A-0 436 997 a display device is disclosed comprising a stack of apertured plates between a phosphor screen and transport ducts in which electrons can be transported. The problem of electrons reaching the wrong locations however is not recognized nor tackled in these applications.
  • Japanese abstract of JP-A-59 180 942 discloses a display device, but no spacer plates nor means for intercepting unwanted electrons.
  • the preselection structure may comprise a preselection plate provided with (extraction) apertures constituting the extraction locations, which apertures are provided row by row with strip-shaped preselection electrodes connected to a circuit to which, in operation, preselection voltages are applied. If preselection electrodes in the form of gauze strips or perforated strips are used, the preselection plate may be dispensed with.
  • a solution is to provide an intermediate spacer having ducts connecting the extraction locations with the associated fine-selection apertures. The thicker the intermediate spacer, the smaller the risk of direct hits. If the intermediate spacer is not to be made too thick, the invention as claimed provides the following solutions guaranteeing colour purity and contrast.
  • the active selection structure comprises a preselection plate having extraction apertures and a selection plate-having apertures which can be activated, each extraction aperture of the preselection plate being associated with at least two activatable apertures of the selection plate and each extraction aperture having an entrance aperture and an exit aperture, the projection of each exit aperture on the selection plate being situated between the at least two selection apertures with which the extraction aperture is associated.
  • Each extraction aperture may have parallel walls, may be tapered or may have a stepped composite shape.
  • a further solution as claimed is characterized in that the preselection electrodes are arranged on the surface of the preselection plate facing the rear wall of the device. This provides a satisfactory extraction of the electrons from the electron ducts, while the risk of unwanted electrons impinging from the preselection plate onto the luminescent screen is reduced.
  • a plurality of parallel perforated strips or gauze strips can be used instead of a pattern, metallized on the preselection plate, of conductors which are pierced at the location of the preselection apertures. These strips may be carried by the intermediate spacer. The preselection plate can then be dispensed with.
  • An effective and relatively simple solution of guaranteeing a satisfactory contrast and a satisfactory colour purity is to arrange an auxiliary or dummy electrode for intercepting unwanted electrons between each extraction location and the associated selection apertures.
  • the dummy electrodes may be electrically connected in a row pattern. If the fine-selection electrodes are separately driven, all dummy electrodes may convey the same voltage. If corresponding fine-selection electrodes are capacitively interconnected in one group or in a plurality of groups so as to reduce the number of drive circuits, it is preferable to provide the dummy rows with the required (pulse) voltage from a selection circuit individually, or per group or groups of corresponding dummy rows.
  • the space between the preselection plate and the selection plate is continuously "in the transport mode" in operation.
  • the selection electrodes and/or the dummy electrodes are connected to a circuit for applying, in operation, a higher DC voltage to these electrodes than to the preselection electrodes. Without this measure there is the risk that said space charges negatively, whereafter transport is no longer possible. A restart of the transport is difficult because negative charges are difficult to remove.
  • Fig. 1 shows a flat-panel picture display device according to the invention, having a display panel (window) 3 and a rear wall 4 located opposite said panel.
  • a luminescent screen 7 having a repetitive pattern (rows or dots) of triplets of red (R), green (G) and blue (B) luminescing phosphor elements is arranged on the inner surface of window 3.
  • the luminescent screen 7 is either arranged on a transparent, electrically conducting layer (for example, ITO) or is provided with an A1 backing.
  • the (dot-shaped) phosphor elements of a triplet are located at the vertices of a triangle.
  • An electron source arrangement 5 for example a line cathode which by means of drive electrodes provides a large number, for example 600, of electron emitters or a similar number of separate emitters, is arranged proximate to a wall 2 which interconnects panel 3 and rear wall 4.
  • Each of these emitters is to provide a relatively small current so that many types of cathodes (cold or hot cathodes) are suitable as emitters.
  • the emitters may be arranged jointly or separately. They may have a constant or a controllable emission.
  • the electron source arrangement 5 is arranged opposite entrance apertures of a row of electron transport ducts extending substantially parallel to the screen, which ducts are constituted by compartments 6, 6', 6'', ..., etc., in this case one compartment for each electron source.
  • These compartments have cavities 11, 11', 11'', ... defined by the rear wall 4 and partitions 12, 12', 12'',...At least one wall (preferably the rear wall) of each compartment should have a high electrical resistance which is suitable for the purpose of the invention in at least the transport direction (suitable materials are, for example ceramic material, glass, synthetic material - coated or uncoated -) and have a secondary emission coefficient ⁇ > 1 over a given range of primary electron energies.
  • An axial electron transport field can be generated in the compartments by applying a potential difference across the upper and lower contacts 32 and 33.
  • the electrical resistance of the wall material has such a value that a minimum possible total amount of current (preferably less than, for example 10 mA) will flow in the walls in the case of a field strength in the axial direction in the compartments of the order of one hundred to several hundred Volts per cm required for the electron transport.
  • the invention utilizes the aspect disclosed in EP-A-400 750 and EP-A-436 997 that vacuum electron transport within compartments having walls of electrically insulating material is possible if an electric field (E y ) of sufficient power is applied in the longitudinal direction of the compartment.
  • Structure 100 is separated from the luminescent screen 7 by a flu-spacer structure 101, for example an apertured electrically insulating plate.
  • the inventive display device in this embodiment largely comprises a stack of plates of electrically insulating material which are directly arranged on each other and have communicating apertures.
  • the cavities 11, 11', ... may be provided in the rear wall 4 so that the partitions 12, 12' can be dispensed with.
  • This concept leads to a very simple structure of light weight because it does not require any additional vacuum support while the front and rear walls may be relatively thin.
  • Fig. 2a shows in a diagrammatical cross-section a part of the display device of Fig. 1 in greater detail, particularly the active colour selection plate structure 100 which comprises a preselection plate 10a with extraction apertures 8, 8', 8'', ... and a fine-selection plate 10b with groups of apertures R, G, B.
  • the active colour selection plate structure 100 which comprises a preselection plate 10a with extraction apertures 8, 8', 8'', ... and a fine-selection plate 10b with groups of apertures R, G, B.
  • three fine-selection apertures R, G, B are associated with each extraction aperture 8, 8', etc.
  • Other numbers for example, 4 or 6 are alternatively possible.
  • An intermediate spacer structure 10b is arranged between the preselection plate 10a and the fine-selection plate 10c.
  • This structure accommodates communication ducts 30, 30' having a cross-section which is chosen to suit the shape of the phosphor triplets (for example, a triangular cross
  • Electron transport ducts 6 are formed between the structure 100 and rear wall 4. To be able to draw electrons from the transport ducts 6 via the apertures 8, 8', ..., pierced metal preselection electrodes 9,9', etc. are arranged on the screen-sided surface of the plate 10a.
  • the walls of the apertures 8, 8', ... are preferably metallized completely or partly, but there is preferably no or little electrode metal on the surface of plate 10a on the side where the electrons land. This is done to ensure that a minimal number of electrons remain on a selection electrode during addressing ( i.e . the electrode must preferably draw a minimal current).
  • Another solution to the problem of drawing current is to ensure that there is electrode metal on the selection plate surface where the electrons land, but this metal should then be given such a large secondary emission coefficient that the preselection electrodes do not draw any net current.
  • the screen-sided surface of the apertured fine-selection plate 10c is provided with (fine-) selection electrodes 13, 13', ... for realising colour selection.
  • the apertures are preferably metallized completely or partly.
  • the possibility of capacitively interconnecting corresponding fine-selection electrodes is important in this respect. In fact, a preselection has already taken place and, in principle, electrons cannot land at the wrong location. This means that only three drive circuits, or a small number of groups of three drive circuits are required for this mode of fine-selection (fine-selection based on three colours).
  • the drive is effected as follows, but there are also other possibilities.
  • the preselection electrodes 9, 9', ... as well as the fine-selection electrodes 13, 13', ... are brought to a substantially linearly increasing potential, for example by means of suitable voltage dividing resistors (see Fig. 9 and Fig. 2b, respectively).
  • Consecutive preselection lines are selected by applying a positive voltage pulse of, for example 200 V to the desired preselection electrode.
  • the colour pixels are subsequently addressed by applying shorter pulses having an amplitude of, for example 300 V to the fine-selection electrodes. It must of course be ensured that the line-selection pulses are in synchronism with the video information.
  • the video information is applied, for example, to the g 1 electrodes in the form of a time (or amplitude-) modulated signal.
  • the fine-selection electrodes preferably have such an electrical resistance that they safeguard the electronic circuits against breakdown from the luminescent screen.
  • Fig. 9 shows a diagram for driving the preselection (or line-selection) electrodes.
  • each preselection electrode 13, 13' is driven by the drive circuit D 1 via a capacitor C.
  • the line-selection electrodes are subjected to a linearly increasing DC voltage by connecting them to voltage dividing resistors 31.
  • These voltage dividing resistors may be arranged proximate to the rim of the plate carrying the preselection electrodes (which is plate 10d in Fig. 2).
  • the voltage dividing resistors are connected to a voltage source so that there is a sufficient transport voltage across the length of the transport ducts. It is advantageous to cause the plate carrying the preselection electrodes to project from the other plates (see Fig. 1). It may then also be used to carry the capacitors and particularly the circuit D 1 .
  • auxiliary electrodes 14, 14', ... are arranged between the electron transport ducts and the fine-selection plate 10c.
  • Fig. 6 shows an embodiment of a pattern of dummy electrodes 14, 14', ... arranged on the surface of the selection plate 10c facing the rear wall 4.
  • These dummy electrodes 14, 14' ensure that electrons which might come from a non-addressed preselection aperture (referred to as "high hop” electrons) are depleted so that they cannot reach the luminescent screen.
  • the dummy electrodes of the non-addressed colour pixels are brought to a higher voltage than the adjacent fine-selection electrodes. To this end they are connected to a drive circuit D 2 (Fig. 6). This guarantees a perfect contrast because "high hop" electrons cannot reach the luminescent screen but are depleted by the dummy electrodes.
  • the relevant fine-selection electrode is brought to a higher voltage than the adjacent dummy electrode.
  • the structure shown diagrammatically in Fig. 3 prevents electrons from passing directly from a transport duct 11 to the wrong, non-addressed colour pixel on the luminescent screen.
  • the colour selection structure 100 is provided with a preselection plate 20a having extraction apertures 28 with an electron exit aperture and an entrance aperture.
  • the projection of the electron exit aperture 28 on the fine-selection plate 20c is situated between the apertures 23,23' of the fine-selection plate 20c with which the relevant extraction aperture 28 is associated (by means of a duct structure in the intermediate spacer structure 20b) (see Fig. 7).
  • Fig. 4 An alternative to the Fig. 3 structure is shown in Fig. 4.
  • the strip-shaped metal preselection electrodes 29, ... are present in the transport ducts 11, which substantially only leads to extraction, if so desired, of electrons hopping across the rear wall 4.
  • the preselection electrodes may have the shape of perforated metal strips, or of gauze strips. If the intermediate spacer structure 20b is used to carry these strips, the preselection plate 20a may be dispensed with.
  • Fig. 8 shows diagrammatically an entrance portion of an electron transport duct 11 which is an alternative to the structure shown in Fig. 1 (in which the electrons are injected through an entrance aperture 80 in the bottom of the transport duct 11).
  • the structure shown in Fig. 8 is characterized in that the electrons emitted by the cathode wire 5 are injected through an entrance aperture 80 in a wall of the transport duct 11.
  • a G 1 electrode or a G 1 ' electrode is associated with each entrance aperture 80, which electrode is connected to video signal-controlled means for opening, less far opening or closing G 1 (for which a voltage swing of several dozen Volts is required), while a G 2 electrode may also be added, with which electrode, inter alia the entrance energy of the electrons which are being injected can be controlled.
  • the entrance apertures of the transport ducts may be arranged in the preselection plate or in the rear wall. They may be arranged, for example at the lower or upper side, or at the lower and upper sides, or in the middle between the "upper” and “lower” sides. The latter is advantageous, particularly when larger display formats are used. If desired, it is even possible to arrange the entrance apertures off-centre.
  • the transport voltages which are required to draw the electrons up and down in the ducts are then different.
  • the switching electrode denoted by G 1 is perforated and arranged between the cathode and the entrance aperture 80.
  • An alternative is the G 1 ' electrode denoted by a broken line and being arranged in such a way that the cathode 5 is between this G 1 ' electrode and the entrance aperture 80.
  • An oblique entrance plate L located opposite the entrance aperture 80 is also shown by means of a broken line. This plate need not be absolutely present, but its presence does have significant advantages.
  • the landing area for example a landing electrode, in this case the lower contact 33, should be relatively broad so as to prevent hydrocarbons from the cathode 5, which are released upon activation, from reaching the insulator material. These hydrocarbons have a poor secondary emission coefficient and impede the entrance and the transport. A metal landing electrode is therefore necessary. A poor secondary emission coefficient of this electrode then no longer results in its charging; in fact, the potential of the electrode is fixed.
  • the performance of such an entrance may differ from display to display and also from transport duct to transport duct within a display, the latter giving rise to smears.
  • the entrance efficiency is defined if the quantity of electrons which is actually transported is divided by the quantity which, after having passed G 1 , lands on the lower contact 33.
  • This geometry has a relatively low entrance efficiency if the transport fields are not too strong.
  • the previous history is also important.
  • a poorly functioning transport duct may be started or extinguished, for example, by varying the potential of G 1 or the lower contact 33 (for a short time). The cause probably resides in negative charging of the side walls of the duct.
  • a metal landing electrode like the lower contact 33, short-circuits a part of the axial transport field so that electrons leaving this field cannot take up enough energy from the field. An accumulation of negative charge and a partial cut-off of the transport is the result. This geometry works without any problem only in the case of high transport fields.
  • a landing electrode in the form of an electrically conducting plate L is arranged obliquely opposite the entrance aperture 80.
  • the axial transport field is not short-circuited in the direction perpendicular to the plate L, in contrast to the direction along the plate.
  • the only remaining perpendicular component can be resolved into a component transverse to the transport direction and a component parallel to the transport direction.
  • the latter component forces the electrons into the duct 11.
  • proximate to the landing electrode, in this case the oblique electrode L energy can now be taken up from the transport field. Consequently, a sufficient transport can take place, also at relatively low transport fields.
  • the angle at which the electrode 13 extends to the longitudinal axis of the duct 11 may be 45°, but this is not necessary.
  • the oblique landing electrode may be used in a mode in which entering electrons impinge upon it, as well as in a mode in which entering electrodes are shut off (by applying a negative voltage), into the transport duct.
  • the flu-spacer plate 101 in Figs. 1 and 2 may have such an apertured pattern that each flu-spacer aperture connects one fine-selection aperture with one pixel on the luminescent screen. In that case an optimum colour purity is guaranteed. However, it is alternatively possible to form the apertured pattern in such a way that each flu-spacer aperture connects at least two fine-selection apertures with at least two pixels. (This reduces the risk of breakdown. A tapered aperture shape may also be advantageous in this respect.)
  • the stepped selection structure has been described hereinbefore in relation to colour selection.
  • the stepped selection structure can also be used to advantage for a screen luminescing in one colour, in that case for obtaining a high resolution with a minimum number of drive circuits.
  • the length of the electron transport ducts and the number of juxtaposed transport ducts are unimportant for the picture quality. Any aspect ratio for a display screen having a short axis and a long axis is thus possible, for example 4:3; 14:9; 16:9.
  • the electron transport ducts are generally arranged parallel to the short display screen axis, but in some cases it may be advantageous to arrange them parallel to the long axis.
  • the transport ducts should be as broad as possible.
  • the pitch of the transport ducts and the pitch of the triplets of pixels are decoupled. It is then possible, for example, to address two juxtaposed triplets from one transport duct (instead of two) by means of one electron emitter section (instead of two). In that case the double number of preselection electrodes is required and the emitter sections must be driven twice as fast. An example of such a dual preselection is shown diagrammatically in Fig. 10.
  • Each selection electrode 42 is divided into two apertured sub-electrodes 43a and 43b in the manner shown, which simplifies contacting. In this way the horizontal resolution can be doubled without having to change the mode of operating the transport ducts 6, 6', 6'', ... (each cooperating with one electron emitter).
  • Three fine-selection apertures in a fine-selection plate for selecting the colours red (R), green (G) and blue (B) are associated with each preselection aperture 44,44', ..., for example, as is shown diagrammatically in Fig. 2a.
  • the system described can be operated in the "multiplex" mode. This means that, for example 2 x 3 pixels can be driven (multiplexed) in one line period by means of one electron emitter. (Other multiplex schemes are alternatively possible.)
  • the electron emitters with drive electrodes G 1 are driven by means of a video drive circuit 34.

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Claims (10)

  1. Bildwiedergabeanordnung mit einer Vakuumumhüllung mit einer durchsichtigen Vorderwand (3) mit einem Leuchtschirm (7) mit einem Muster von Bildelementen und mit einer Rückwand (4), wobei diese Bildwiedergabeanordnung mit einer Anzahl (5) nebeneinander liegender Quellen zum Emittieren von Elektronen, einer Anzahl mit den Quellen (5) zusammenarbeitender, sich nahezu parallel zu der Vorderwand (3) erstreckender Elektronentransportleitungen (11) zum Transportieren von Elektronen in Form von Elektronenströmen versehen ist und mit einer aktiven Selektionsstruktur (100) um der betreffenden Transportleitung (11) Elektronenströme zu entnehmen und diese Ströme Bildelementen des Leuchtschirms (7) zuzuführen, wobei die aktive Selektionsstruktur (100) eine Vorselektionsstruktur (10a) mit aktivierbaren Extraktionsstellen aufweist, die reihenweise mit den Transportleitungen (11) kommunizieren sowie eine Selektionsplatte (10c) mit aktivierbaren Löchern (R, G, B), die je einem Bildelement zugeordnet sind, wobei jede aktivierbare Extraktionsstelle der Vorselektionsstruktur (10a) wenigstens zwei aktivierbaren Löchern (R, G, B) der Selektionsplatte (10c) zugeordnet sind, dadurch gekennzeichnet, daß zwischen jeder Extraktionsstelle und den zugeordneten Selektionslöchern (R, G, B) Mittel (14, 24) vorgesehen sind zum Abfangen unerwünschter Elektronen.
  2. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Extraktionsstellen Extraktionsöffnungen (8) in der Vorselektionsplatte (10a) sind, die eine Eingangs- und eine Ausgangsöffnung (28) aufweist und daß die Projektion der Ausgangsöffnung (28) jeder Extraktionsöffnung (8) auf die Selektionsplatte (10a) zwischen wenigstens zwei Selektionsöffnungen (R, G, B) liegt, denen die Extraktionsöffnung (8) zugeordnet ist.
  3. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen jeder Extraktionsstelle und den zugeordneten Selektionsöffnungen (R. G. B) eine Hilfselektrode (14, 24) vorgesehen ist zum Abfangen unerwünschter Elektronen.
  4. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Extraktionsstellen Extraktionsöffnungen sind und die Öffnungen reihenweise mit streifenförmigen Vorselektionselektroden (9) versehen sind, die mit einer Schaltungsanordnung verbunden werden können zum im Betrieb Zuführen von Adressierungsspannungen zu derselben, wobei diese streifenförmigen Vorselektionselektroden (9) den Transportleitungen (11) zugewandt vorgesehen sind.
  5. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Extraktionsstellen Extraktionsöffnungen (8) in einer Vorselektionsplatte (10a) sind, die teilweise oder völlig metallisiert sind.
  6. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Eingangsöffnungen (80) jeder Leitung in den Wänden der Transportleitungen vorgesehen sind, die sich im wesentlichen parallel zu der Ebene der Pixel erstrecken.
  7. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Selektionsstruktur (100) eine Stapelung von Lochplatten aufweist, die unmittelbar miteinander in Kontakt sind, wobei die Öffnungen in benachbarten Platten miteinander kommunizieren, wobei diese Stapelung aufeinanderfolgend eine Vorselektionsstruktur (10a), eine Zwischenstruktur (10b), eine Feinselektionsstruktur (10c) und eine Distanzplatte (101) grenzend an den leuchtschirm (7) aufweist.
  8. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Selektionselektroden (9, 13) aus einem Material hergestellt sind, das einen elektrischen Widerstand aufweist, der zum Schützen von HF-Durchschlag geeignet ist.
  9. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Extraktionsstellen Extraktionsöffnungen (8) in einer Vorselektionsplatte (10a) sind und die Öffnungen kegelförmig sind.
  10. Bildwiedergabeanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Extraktionsstellen Extraktionsöffnungen (8) in einer Vorselektionsplatte (10a) sind und die Öffnungen eine gestufte Form haben.
EP19920204006 1992-01-03 1992-12-18 Flaches Bildschirmanzeigegerät mit Elektronentransportkanälen und einer doppelten Auswahlstruktur Expired - Lifetime EP0550103B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP92200016 1992-01-03
EP92200016 1992-01-03

Publications (2)

Publication Number Publication Date
EP0550103A1 EP0550103A1 (de) 1993-07-07
EP0550103B1 true EP0550103B1 (de) 1998-04-15

Family

ID=8210347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920204006 Expired - Lifetime EP0550103B1 (de) 1992-01-03 1992-12-18 Flaches Bildschirmanzeigegerät mit Elektronentransportkanälen und einer doppelten Auswahlstruktur

Country Status (3)

Country Link
EP (1) EP0550103B1 (de)
JP (1) JPH05266831A (de)
DE (1) DE69225124T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3170291B2 (ja) * 1995-08-25 2001-05-28 インターナショナル・ビジネス・マシーンズ・コーポレーション 表示システム
GB2304981A (en) * 1995-08-25 1997-03-26 Ibm Electron source eg for a display
GB2320127A (en) * 1996-12-04 1998-06-10 Ibm Display device
US20060061253A1 (en) * 2002-10-18 2006-03-23 Koninklijke Philips Electronics N.V. Picture display device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259611A (en) * 1979-04-27 1981-03-31 Rca Corporation Segmented shadow mask
NL9001528A (nl) * 1990-07-05 1992-02-03 Philips Nv Beeldweergeefinrichting van het dunne type.
DE69026233T2 (de) * 1990-01-10 1996-10-10 Philips Electronics Nv Bildwiedergabeanordnung vom dünnen Typ

Also Published As

Publication number Publication date
EP0550103A1 (de) 1993-07-07
JPH05266831A (ja) 1993-10-15
DE69225124D1 (de) 1998-05-20
DE69225124T2 (de) 1998-10-29

Similar Documents

Publication Publication Date Title
US5801485A (en) Display device
US5313136A (en) Thin-type picture display device
JP3110086B2 (ja) 薄型画像表示装置
EP0436997A1 (de) Bildwiedergabeanordnung vom dünnen Typ
US5489815A (en) Flat-panel type picture display device with electron transport ducts and a double selection structure
WO1996026514A1 (en) Picture display device
EP0550103B1 (de) Flaches Bildschirmanzeigegerät mit Elektronentransportkanälen und einer doppelten Auswahlstruktur
US5959397A (en) Flat-panel type picture display device
US5844354A (en) Flat-panel type picture display device with electron propagation ducts
US5625253A (en) Flat-panel type picture display device
EP0560434B1 (de) Bildwiedergabeeinrichtung vom Flachanzeigetyp
US5557296A (en) Flat-panel type picture display device with insulating electron-propagation ducts
US5721468A (en) Flat-panel type picture display device with electron propagation ducts
EP0489457B1 (de) Bildwiedergabeanordnung vom dünnen Typ
KR100371040B1 (ko) 박판형화상디스플레이장치
JPH09505415A (ja) 色表示装置
US6188178B1 (en) Flat-panel picture display device with spacer means adjacent the display screen
US3969650A (en) Gas discharge display device and a novel hollow cathode therefor
EP0574084B1 (de) Flache Bildwiedergabeanordnung mit Elektronenfortpflanzungskanälen
US4667130A (en) Flat gas discharge display
NL8702829A (nl) Weergeefinrichting.
US5966109A (en) Picture display device having a flat vacuum tube
US5986627A (en) Flat-panel type picture display device with electron propagation ducts
EP0655768A1 (de) Bildwiedergabegerät mit Flachröhre
JPH0459740B2 (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT NL

17P Request for examination filed

Effective date: 19931222

17Q First examination report despatched

Effective date: 19951221

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19980415

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980415

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980415

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980415

REF Corresponds to:

Ref document number: 69225124

Country of ref document: DE

Date of ref document: 19980520

RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V.

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20011224

Year of fee payment: 10

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020220

Year of fee payment: 10

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20020919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20021218