EP0109010A2 - Dispositif plat de reproduction d'images - Google Patents

Dispositif plat de reproduction d'images Download PDF

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Publication number
EP0109010A2
EP0109010A2 EP83110983A EP83110983A EP0109010A2 EP 0109010 A2 EP0109010 A2 EP 0109010A2 EP 83110983 A EP83110983 A EP 83110983A EP 83110983 A EP83110983 A EP 83110983A EP 0109010 A2 EP0109010 A2 EP 0109010A2
Authority
EP
European Patent Office
Prior art keywords
line
conductors
parallel
deflection electrodes
electrode
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Withdrawn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
EP83110983A
Other languages
German (de)
English (en)
Other versions
EP0109010A3 (fr
Inventor
Burkhard Dipl.-Phys. Littwin
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
Publication of EP0109010A2 publication Critical patent/EP0109010A2/fr
Publication of EP0109010A3 publication Critical patent/EP0109010A3/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Withdrawn legal-status Critical Current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
    • H01J17/38—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
    • H01J17/498—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with a gas discharge space and a post acceleration space for electrons

Definitions

  • the invention relates to a flat tube according to the preamble of claim 1.
  • a screen is described in DE-OS 27 42 555.
  • the previously known display works according to the following principle: electrons, which are generated in a large area in a rear room, pass through selectively opened holes in an electrode matrix into a front room, in which they are accelerated and finally hit a front fluorescent screen.
  • This concept leads to a relatively flat design and makes it possible, at least if the electrons are obtained from a wedge-shaped gas discharge and the post-acceleration space is kept plasma-free using the Paschen law (DE-PS 24 12 869), also an optically perfect representation of rapidly moving processes .
  • DE-PS 24 12 869 also an optically perfect representation of rapidly moving processes .
  • the column-parallel deflection electrodes are switched in time with the color change, such that the electrons are deflected to the left once during the period T, once fly straight ahead and once are deflected to the right.
  • the line-parallel deflection electrodes which deflect the electrons upwards and downwards, are switched over when a field is built up; they ensure interlacing of fields.
  • the invention is therefore based on the object of developing a display device of the type mentioned which can be manufactured more conveniently and basically manages with the same number of connections and the same switching means. This object is achieved according to the invention by a picture tube having the features of patent claim 1.
  • the proposed solution is based on the consideration that the deflection electrode pairs respectively assigned to the matrix conductors do not have to be electrically separated from one another at all; one also achieves the goal if adjacent deflection capacitors share an electrode. If such a coupling is permitted, the number of electrodes is reduced to half and there are no longer any short circuits to fear because of the relatively large electrode spacings; in addition, the entire deflecting part can be implemented in the simplest form, for example as a cross grid made of tensioned wires. The number of external contacts need not increase, because here too the horizontal and the vertical deflecting electrodes can be combined interdigitally.
  • the addressing technology can also remain the same: with vertical deflection, you will at most switch to other switching cycles and phases, and the horizontal deflection can be controlled in a conventional manner. It should be noted, however, that neighboring electron beams of a row are always deflected in opposite directions; if necessary, the color dots on the fluorescent screen should be rearranged, for example from the usual color sequence red-green-blue to the red-green-blue-blue-green-red scheme. If one wanted to stick to the usual color distribution, the circuit would have to be designed in such a way that adjacent column conductors receive their row information signals with reversed color order during each row scanning time; as is evident from the older, as yet unpublished patent application P 32 35 894.6, this is readily possible.
  • the flat screen of Figure 1 is used to display black and white television pictures. It contains in particular a gas-filled envelope 1 with a back plate 2, a front plate 3 and a control plate 4. All three parts extend in mutually parallel planes, the control plate dividing the interior of the envelope into two chambers, a front acceleration chamber 5 and a rear gas discharge chamber 6.
  • the back plate 2 is provided on its front side with a family of parallel, relatively large-area cathode strips 7.
  • the front plate 3 has a regular grid of phosphor strips 8, 9 on its rear side and a post-acceleration anode 10 above it.
  • the control plate 4 has the following structure: a backing made of insulating material is provided on its rear and front side with a group of strip-shaped, parallel conductors (row conductor 11 or column conductor 12).
  • the row conductors run parallel to the cathode strips 7 and the column conductors extend perpendicularly thereto.
  • the plate and the conductor are broken through at the points of intersection of the electrode matrix, so that electron passage openings 13 result.
  • Each row of openings parallel to the row conductor is assigned a pair of phosphor strips 8, 9, which are offset somewhat upwards or downwards relative to the openings.
  • the control plate 4 is preceded by a deflection unit 14, which in the present case consists essentially of wires 16.
  • the wires are located in a plane parallel to the control plate 4 and are arranged such that, viewed from a direction perpendicular to the control plate plane, they each run between two adjacent rows of openings parallel to the line conductor.
  • the even and odd wires are each one. common (not shown) voltage source connected.
  • the following voltages are present on the individual electrodes: on the selected and non-selected cathode strips - 200 V or 0 V; 0 V or -50 V on the sensed and non-sensed row conductors; on the column conductors between -80 V and -30 V; on the even-numbered and odd-numbered deflection electrodes either +50 V or -50 V or -50 V or +50 V; and at the post-acceleration anode + 4KV.
  • the row conductors are keyed one after the other, i.e., successively raised to the voltage 0 V.
  • the cathode voltages are synchronized with the line scanning voltage in such a way that a plasma burns between the selected line conductor and the opposite cathode strip during the line advancement.
  • the column conductors receive the information signals of two picture lines in succession during the time in which a specific row conductor is driven; each line conductor sampling time thus comprises two picture line periods.
  • the deflection wires are switched at the switching frequency for the row conductors, in such a way that the wire connection leads one picture line period. In this way, the electron beams of each opening row are first directed onto one and then onto the other phosphor stripe of the associated pair of stripes, so that an image with double image line density is completely built up after the completion of a complete line conductor scanning cycle.
  • the deflection unit must have a second grid electrode which is to be oriented relative to the column conductors in exactly the same way as the first grid electrode can be designed with respect to the row conductors and, moreover, can be constructed in exactly the same way.
  • FIGS. 2 and 3 A specific exemplary embodiment of this is shown in FIGS. 2 and 3: in front of the wires 16, further wires 17 are positioned - in a plane also parallel to the control plate - each of which runs between adjacent column conductors 12. Both electrode planes are fixed in the insulated position at the crossing points of the wires by glass solder columns 18. The glass solder columns start from the control plate 4 and thus hold the entire deflection system in an adjusted position.
  • This electrode system is part of a display device which displays colorful images using three primary colors.
  • the wires 17 take over the color deflection, that is to say the electron beams are successively guided to different color sections 19, 20 and 21 of a phosphor strip 8 and 9 during each image line period. For illustration purposes, paths 22, 23, 24 are shown in the figures, which can take electron beams in a certain switching state of the deflection unit.
  • the deflection unit could also be implemented using thin-film technology.
  • a corresponding example is shown in FIGS. 4 and 5, in which a deflection disk 26 has openings 27 that are regularly arranged and are aligned with the openings 13 of the control disk 4, and carries strip-shaped electrodes 28, 29 on both sides.
  • the electrodes 28 still engage with projections 31 through the openings 27 in order to extend the deflection distance.
  • the deflection disk 26 lies on the control disk 4 in such a way that no undesired contacts are made.
  • the control and deflection parts should be dimensioned such that the electron beams excite the individual phosphor stripe sections over as large an area as possible in order to optimize the luminous efficacy and lifetime of the phosphor.
  • the electro-optical conditions in the post-acceleration space are such that the sections 19, 20, 21 are luminescent over the entire surface.
  • the control plate openings 13 - usually upright rectangles - are higher and of similar width.
  • FIG. 6 shows, in a representation true to scale, an example of dimensions which does not cause any particular difficulties during manufacture.
  • the row conductors 11 and the column conductors 12 are 0.74 mm and 0.32 mm wide, respectively, and are 0.11 mm and 0.16 mm apart.
  • the openings have an area of 0.54 x 0.20 mm 2 , and the individual phosphor stripe sections 19, 20 and 21 of a color triple, which together form a square, are 0.48 mm high and 0.16 mm wide.
  • the interdigitally interconnected vertical deflection electrodes into individual groups and to control them as follows: the group that includes the deflection capacitor in front of the row conductor currently being sensed receives the deflection voltage, while all other groups are at blocking potentials . If the cathode is subdivided, the vertical deflection electrodes opposite each of the cathode strips should be combined. Further details can be found in the earlier patent application P 3 207 685.1.
  • the invention is not limited to the exemplary embodiments shown. If one considers that in the present context it is essentially only a question of the vertical and, if necessary, deflection To realize even in the horizontal direction with one electrode each between adjacent row or column conductors, it becomes clear that a number of variants are still possible in terms of construction and control. For example, the information could be written field by field, in such a way that the individual line conductors remain activated for only one image line period and the line-parallel deflection electrodes are switched over in clock and phase synchronization.

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
EP83110983A 1982-11-10 1983-11-03 Dispositif plat de reproduction d'images Withdrawn EP0109010A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3241605 1982-11-10
DE3241605 1982-11-10

Publications (2)

Publication Number Publication Date
EP0109010A2 true EP0109010A2 (fr) 1984-05-23
EP0109010A3 EP0109010A3 (fr) 1986-10-29

Family

ID=6177794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110983A Withdrawn EP0109010A3 (fr) 1982-11-10 1983-11-03 Dispositif plat de reproduction d'images

Country Status (3)

Country Link
US (1) US4672272A (fr)
EP (1) EP0109010A3 (fr)
JP (1) JPS5999649A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8702400A (nl) * 1987-10-09 1989-05-01 Philips Nv Kleurenbeeldbuis met asymmetrische deflektie-elektroden.
US5557177A (en) * 1994-01-18 1996-09-17 Engle; Craig D. Enhanced electron beam addressed storage target
KR0160321B1 (ko) * 1994-04-28 1998-12-01 박현승 평면가스표시관
GB2304981A (en) * 1995-08-25 1997-03-26 Ibm Electron source eg for a display
GB2304984B (en) * 1995-08-25 1999-08-25 Ibm Electron source
GB2313703B (en) 1996-06-01 2001-03-21 Ibm Current sensing in vacuum electron devices
US6208072B1 (en) * 1997-08-28 2001-03-27 Matsushita Electronics Corporation Image display apparatus with focusing and deflecting electrodes
JP3457162B2 (ja) 1997-09-19 2003-10-14 松下電器産業株式会社 画像表示装置
US6236381B1 (en) 1997-12-01 2001-05-22 Matsushita Electronics Corporation Image display apparatus
US6630782B1 (en) 1997-12-01 2003-10-07 Matsushita Electric Industrial Co., Ltd. Image display apparatus having electrodes comprised of a frame and wires
WO2001041176A2 (fr) * 1999-11-15 2001-06-07 Mesa Vision, Inc. Cathode virtuelle segmentee

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956667A (en) * 1974-03-18 1976-05-11 Siemens Aktiengesellschaft Luminous discharge display device
DE2742555A1 (de) * 1976-09-20 1978-03-23 Matsushita Electric Ind Co Ltd Bildwiedergabevorrichtung
GB2096436A (en) * 1981-04-07 1982-10-13 Matsushita Electric Ind Co Ltd Picture image display apparatus
DE3228183A1 (de) * 1982-07-28 1984-02-02 Siemens AG, 1000 Berlin und 8000 München Flache elektronenstrahlroehre und verfahren zu ihrer herstellung
DE3235894A1 (de) * 1982-09-28 1984-03-29 Siemens AG, 1000 Berlin und 8000 München Flache farbbild-wiedergabevorrichtung
DE3335598A1 (de) * 1983-09-30 1985-04-18 Siemens AG, 1000 Berlin und 8000 München Verfahren zur herstellung einer elektrodenplatte, danach hergestellte elektrodenplatte und ihre verwendung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235491B2 (fr) * 1972-02-16 1977-09-09
US3992644A (en) * 1975-06-20 1976-11-16 Zenith Radio Corporation Cathodoluminescent display with hollow cathodes
US4229766A (en) * 1977-05-05 1980-10-21 Siemens Aktiengesellschaft Scanning apparatus and method for operating the apparatus
US4220892A (en) * 1977-06-13 1980-09-02 Rca Corporation Phosphor screen for modular flat panel display device
DE2750587A1 (de) * 1977-11-11 1979-05-17 Siemens Ag Gasentladungsanzeigevorrichtung mit abstandselementen
US4160191A (en) * 1977-12-27 1979-07-03 Hausfeld David A Self-sustaining plasma discharge display device
US4417184A (en) * 1980-08-04 1983-11-22 Matsushita Electric Industrial Co., Ltd. Picture image display apparatus
US4404493A (en) * 1981-04-03 1983-09-13 Matsushita Electric Industrial Co., Ltd. Picture image display apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956667A (en) * 1974-03-18 1976-05-11 Siemens Aktiengesellschaft Luminous discharge display device
US3956667B1 (fr) * 1974-03-18 1983-06-07
DE2742555A1 (de) * 1976-09-20 1978-03-23 Matsushita Electric Ind Co Ltd Bildwiedergabevorrichtung
GB2096436A (en) * 1981-04-07 1982-10-13 Matsushita Electric Ind Co Ltd Picture image display apparatus
DE3228183A1 (de) * 1982-07-28 1984-02-02 Siemens AG, 1000 Berlin und 8000 München Flache elektronenstrahlroehre und verfahren zu ihrer herstellung
DE3235894A1 (de) * 1982-09-28 1984-03-29 Siemens AG, 1000 Berlin und 8000 München Flache farbbild-wiedergabevorrichtung
DE3335598A1 (de) * 1983-09-30 1985-04-18 Siemens AG, 1000 Berlin und 8000 München Verfahren zur herstellung einer elektrodenplatte, danach hergestellte elektrodenplatte und ihre verwendung

Also Published As

Publication number Publication date
JPS5999649A (ja) 1984-06-08
EP0109010A3 (fr) 1986-10-29
US4672272A (en) 1987-06-09

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Inventor name: LITTWIN, BURKHARD, DIPL.-PHYS.