DE1079103B - Arrangement for displaying color television pictures with an index cathode ray tube - Google Patents
Arrangement for displaying color television pictures with an index cathode ray tubeInfo
- Publication number
- DE1079103B DE1079103B DEE15425A DEE0015425A DE1079103B DE 1079103 B DE1079103 B DE 1079103B DE E15425 A DEE15425 A DE E15425A DE E0015425 A DEE0015425 A DE E0015425A DE 1079103 B DE1079103 B DE 1079103B
- Authority
- DE
- Germany
- Prior art keywords
- strips
- frequency
- strip
- index
- phosphor
- 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.)
- Pending
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 238000010894 electron beam technology Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims 4
- 230000000694 effects Effects 0.000 claims 2
- 239000011230 binding agent Substances 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000011368 organic material Substances 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 claims 1
- 239000011574 phosphorus Substances 0.000 claims 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/16—Picture reproducers using cathode ray tubes
- H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
- H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Description
Es sind Kathodenstrahlröhren zur Farbbildwiedergabe bekannt, die als Indexröhren bezeichnet werden und mit einer einzigen Elektronenkanone arbeiten. Gewöhnlich setzt sich der Schirm einer solchen Röhre aus einer Anzahl von parallelen Phosphorstreifen zusammen, die bei Elektronenbestrahlung' in verschiedenen Farben aufleuchten. Beispielsweise sind in einer bekannten Röhre jeweils drei Streifen zu einer Gruppe zusammengefaßt, wobei jede Gruppe aus. einem roten, grünen und blauen Streifen lumineszierenden Phosphors besteht. Die Streifen sind in der bekannten Röhre senkrecht zur Zeilenrichtung· angeordnet. Bei solchen Röhren wird eine Tastanordnung benötigt, die eine einwandfreie Phasenbeziehung zwischen der Elektronenstrahistellung und dem den Strahl modulierenden Farbsignal herstellt. Solche Tastanordnungen bringen jedoch große Schwierigkeiten mit sich, da besondere Kompensationssysteme oder andere komplizierte Anordnungen notwendig sind.There are known cathode ray tubes for color display, which are referred to as index tubes and work with a single electron gun. Usually the screen of such a tube sits down composed of a number of parallel phosphor strips which, when exposed to electrons, appear in different Colors light up. For example, in a known tube there are three strips in each group summarized, each group consisting of. a red, green, and blue stripe of luminescent phosphor consists. The strips are arranged in the known tube perpendicular to the direction of the rows. at such tubes a probe assembly is required that a proper phase relationship between the Produces electron beam position and the color signal modulating the beam. Such tactile arrangements however, bring great difficulties, as special compensation systems or others complicated arrangements are necessary.
Der Erfindung liegt die Aufgabe zugrunde, solche Schwierigkeiten zu vermeiden.The invention is based on the object of avoiding such difficulties.
Die Erfindung betrifft eine Anordnung zur Farbbildwiedergabe mit einer Kathodenstrahlröhre, deren Schirm aus einer Anzahl von regelmäßig angeordneten jeweils eine bestimmte Farbe ausstrahlenden LeuchtSitoffstreifen besteht und der z.u den Streifen parallel verlaufende Indexstreifen aus einem sekundärelektronenemittierenden Material besitzt. Ernndungsgemäß ist dieses Material so auf dem Schirm angeordnet, daß es in Richtung der Phosphorstreifen eine charakteristische Änderung des Sekundäremissionskoeffizienten besitzt. Beispielsweise kann dieses Material in Deckung mit dem raten Phosphor-Streifen aufgebracht sein und ein feines Muster aus senkrecht zu dem roten Streifen stehenden kleinen Streifen bilden.. Gemäß der Erfindung besitzt die Röhre Mittel, um den Elektronenstrahl, während er in Zeilenrichtung quer über die Streifen läuft, zu wobbeln. Die Anordnung der sekundärelektronenemittierenden Streifen wird auf die Wobbelfrequenz abgestimmt, um in der Sekundäremission diieses Schirmes eine Änderung der Frequenz, hervorzurufen, die sich von der Bildsignalfrequenz unterscheidet. Es sind weitere Mittel vorgesehen, die Änderung der Sekundäremission zur Steuerung der Modulation des Strahles in der Weise ζω benutzen, daß der Strahl in richtiger Phasenbezieihung zu den einzelnen Leuchtstoiffstreifen steht.The invention relates to an arrangement for color display with a cathode ray tube, whose Screen from a number of regularly arranged each emitting a certain color Luminescent strip exists and the z. To the strip has parallel index strips made of a secondary electron-emitting material. Appropriately this material is arranged on the screen in such a way that it faces the phosphor strips a characteristic change in the secondary emission coefficient owns. For example, this material can coincide with the advised phosphor strip and a fine pattern of small ones perpendicular to the red stripe Stripes form .. According to the invention, the tube has means to the electron beam while he runs across the stripes in the direction of the lines, to wobble. The arrangement of the secondary electron-emitting Stripe is tuned to the wobble frequency in order to produce this in the secondary emission Screen a change in frequency, which is different from the image signal frequency. It further means are provided that change the secondary emission to control the modulation of the Use the beam in such a way that the beam has the correct phase relation to the individual fluorescent strips stands.
Zur deutlicheren Erklärung wird die Erfindung nunmehr an Hand eines Ausführungsbeispiels näher beschrieben.For a clearer explanation, the invention will now be described in more detail using an exemplary embodiment described.
Der Leuchtschirm einer Kathodenstrahlröhre, wie er in den Fig. 1 und 2 gezeigt ist, enthält rote, grüne und blaue Phosphorstreifen. In der Praxis liegen Anordnung zur WiedergabeThe phosphor screen of a cathode ray tube as shown in Figures 1 and 2 contains red, green and blue phosphor streaks. In practice there are arrangements for reproduction
von Farbfernsehbildern
mit einer Index-Kathodenstrahlröhreof color television images
with an index cathode ray tube
Anmelder:Applicant:
Electric & Musical Industries Limited,
Hayes, Middlesex (Großbritannien)Electric & Musical Industries Limited,
Hayes, Middlesex (Great Britain)
Vertreter: Dr.-Ing. B. Johannesson, Patentanwalt,
Hannover, Göttinger Chaussee 76Representative: Dr.-Ing. B. Johannesson, patent attorney,
Hanover, Göttinger Chaussee 76
Beanspruchte Priorität:
Großbritannien, vom. 28. Februar 1957 und 20. Februar 1958Claimed priority:
Great Britain, dated. February 28, 1957 and February 20, 1958
Hans Gerhard Lubszynski,Hans Gerhard Lubszynski,
Waltham St. Lawrence, Berkshire (Großbritannien),
ist als Erfinder genannt wordenWaltham St. Lawrence, Berkshire (UK),
has been named as the inventor
diese Streifen sehr dicht beieinander. Sie sind lediglich zur deutlicheren Darstellung in der Zeichnung in vergrößertem Maßstab dargestellt. Die Farbe, die von den einzelnen Streifen ausgeschickt wird, ist durch die Buchstaben R = Rot, G = Grün und B = Blau gekennzeichnet und die Streifen einer Gruppe mit 1, 2 und 3 bezeichnet. In der Fig. 2 ist durch einen roten Streifen 1 ein Längsschnitt gelegt. Auf dem Streifen 1 ist ein feiner Aluminiumstreifen 4 in bekannter Weise aufgebracht. Auf diesem AIuminiumfilm befindet sich ein feines Muster von horizontalen Streifen. Dieses Muster von feinen Streifen 5 befindet sich auf jedem entsprechenden, beispielsweise roten, Phosphorstreifen. In Fig. 1 sind der Einfachheit halber lediglich zwei rote Phosphorstreifen mit den feinen quer verlaufenden Streifchen bedeckt. Diese Streifchen bestehen aus einem Material, dessen Sekundäremissionskoeffizient möglichst verschieden von dem des Aluminiumfilmes· bei der entsprechenden Betriebsspannung ist. Beispielsweise kann als Sekundärelektronen emittierendes Material Aluminiumoxyd (Al2O3) oder Magnesiumoxyd (MgO) verwendet werden. Wenn man beispielsweise Aluminiumoxyd verwendet, dann kann der Aluminiumfilm in bekannter Weise an den entsprechenden Stellen oxydiert werden. Eine andere Möglichkeit besteht darin,.diese kleinen Querstreifen beispielsweise aus Kohlenstoff herzustellen, der einen wesentlich kleineren Sekundärst 7W/214·these strips very close together. They are only shown in the drawing on an enlarged scale for the sake of clarity. The color that is sent out by the individual stripes is indicated by the letters R = red, G = green and B = blue and the stripes in a group are designated with 1, 2 and 3. In FIG. 2, a longitudinal section is drawn through a red stripe 1. A fine aluminum strip 4 is applied to the strip 1 in a known manner. On this aluminum film there is a fine pattern of horizontal stripes. This pattern of fine stripes 5 is located on each corresponding, for example red, phosphor stripe. In Fig. 1, for the sake of simplicity, only two red phosphor strips are covered with the fine transverse strips. These strips consist of a material whose secondary emission coefficient is as different as possible from that of the aluminum film at the corresponding operating voltage. For example, aluminum oxide (Al 2 O 3 ) or magnesium oxide (MgO) can be used as the secondary electron-emitting material. If, for example, aluminum oxide is used, the aluminum film can be oxidized at the appropriate points in a known manner. Another possibility is to make these small transverse strips from carbon, for example, which has a much smaller secondary 7W / 214 ·
Claims (3)
Auf diese Weise bewirken die Indexsignale, daß die Die Indexstreifen brauchen nicht in Zonen anentspreohenden Komponenten des Videosignals genau geordnet zu sein, die mit den Phosphorstreifen einer mit der Stellung des Elektronenstrahles auf den ent- besonderen Farbe übereinstimmen, sondern sie können sprechenden roten, grünen und blauen Phosphor- 40 ebenso in regelmäßigen Abständen, die irgendeine bestreifen übereinstimmen. Die Trägerfrequenz dieser stimmte Beziehung zu den Abständen der Phosphor-Indexsignale ist von der Aufdrückung einer Wobbel- streifen besitzen, angeordnet sein, Darüber hinaus Schwingung auf den Strahl der Röhre während jeder kann der gleiche Effekt wie bei einem Schirm mit Zeile abhängig. verschiedenfarbigen Phosphorstreifen dadurch erzeugtTo now the index signals preferably only in frequenzstxom, which is superimposed on every change in the video signal depending on the secondary electron emission. Furthermore, during the intervals to obtain the strip 5, one brings the usual in the figure with t v i 2 and t 3 , corresponding to the second anode 6 of the tube (Fig. 3) separated from the io the times when the path of the electron beam aluminum film 4 so that it serves as the strip 5 at the same speed collecting anode for the secondary electrons. In crosses, the high-frequency modulation is essentially the receiver, which is partially shown in FIG. 3 with a constant frequency. The amplifier 10 is on this free, a load resistor 8 is arranged, the frequency matched so that the output signal in one end with the aluminum film 4 and 15 essentially only depends on the secondary electron emission with the other end with a high voltage of the strips 5 is, however, connected by the module source21. The second anode 6 requires lation, which is given by the video signal on the beam ge a slightly higher potential than the film 4 and is independent. Connected to the voltage source 9 by normal equalization, so that the signal component, the electrons emanating from the strip 5 through the amplifier, is screened out by this 20 10 and the second pulse anode 6 designated by 11 can be received. The form owns to be generated. This signal then shows signals which, as a result of the secondary electrons, indicate the position of the beam on the corresponding emission between the film 4 and the strips 5 of the line. Assuming that the beam current strength occurs at the resistor 8, a selec- never less than a certain. Minimum, for example tive amplifier and subsequent distortion 10 an- 25 40 μΑ, decreases, a modulation voltage is always applied, in which rectangular pulses 11 are generated. The resistor 8 is present when the beam disrupts these pulses 11 when the electron-red stripe crosses. However, this modulation is too bright to hit the red phosphorus, and no other time has elapsed. If you continue to use and are used as index signals and usually assume that the highest video frequency with which the wise delay 30 electron beam is modulated via a tapped electron beam corresponds to the strip frequency rungsledtung 12 on the individual gate circuits 13, then the Modulation frequency always given 14 and 15. They cause the video signal to be significantly higher than the highest video frequency, corresponding to the red, green and blue components so that 35 frequency modulation of the index signal in which the beam is modulated by this video signal. Oscillogram 20 is shown no longer.
In this way, the index signals have the effect that the The index strips do not need to be precisely arranged in zones corresponding components of the video signal, which correspond to the phosphor strips of a particular color with the position of the electron beam, but they can speak red, green and blue phosphorus 40 as well at regular intervals that match any strip. The carrier frequency of this correct relationship to the spacing of the phosphor index signals is dependent on the impression of a wobble strip, in addition, oscillation on the beam of the tube during each can have the same effect as with a screen with line. different colored phosphor strips are generated
gung der normalen Ablenkwellenform sind in Fig. 3This wobble oscillation will be done with the help of the switch 4-5 by applying phosphor strips which are generated in the device 16 and which emit essentially only white light for normal image deflection by superimposing sinusoidal oscillation. The frequency of this one color filter in the form of stripes in front of the phosphor component is approximately the same as the stripe layer. In this case, too, the frequency, that is the frequency with which the beam passes over the phosphor stripes red, 5 ° in zones in which the emitting material is present. Circuits for generating color filters are available.
The normal deflection waveform is shown in FIG
punktierte Linie 17 in der Fig. 4 stellt den Weg desnot shown as they are well known. The patent claims:
Dotted line 17 in Fig. 4 represents the path of the
USA.-Patentschrift Nr. 2 759 996.Considered publications:
U.S. Patent No. 2,759,996.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6712/57A GB881471A (en) | 1957-02-28 | 1957-02-28 | Improvements relating to colour-picture reproducing cathode ray tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1079103B true DE1079103B (en) | 1960-04-07 |
Family
ID=9819398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEE15425A Pending DE1079103B (en) | 1957-02-28 | 1958-02-27 | Arrangement for displaying color television pictures with an index cathode ray tube |
Country Status (4)
Country | Link |
---|---|
US (1) | US2912615A (en) |
DE (1) | DE1079103B (en) |
FR (1) | FR1200791A (en) |
GB (1) | GB881471A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1254673B (en) * | 1961-12-25 | 1967-11-23 | Hitachi Ltd | Cathode ray color picture tubes whose screen is provided with a regular arrangement of strips of secondary electron-emitting material |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3631294A (en) * | 1969-07-10 | 1971-12-28 | Princeton Electronic Prod | Electronic storage tube utilizing a target comprising both silicon and silicon dioxide areas |
US3737715A (en) * | 1970-02-02 | 1973-06-05 | Rca Corp | Bistable storage device and method of operation utilizing a storage target exhibiting electrical breakdown |
US3914651A (en) * | 1970-09-24 | 1975-10-21 | Clayton A Washburn | Cathode, ray tube structures |
US3732359A (en) * | 1972-04-19 | 1973-05-08 | Bell Telephone Labor Inc | Beam index color television display device |
US3881182A (en) * | 1973-03-22 | 1975-04-29 | Valery Ivanovich Archakov | Device for color picture reproduction |
GB2052144A (en) * | 1979-06-27 | 1981-01-21 | Ibm | Shadow mask colour television tubes |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2759996A (en) * | 1951-06-30 | 1956-08-21 | Philco Corp | Color television registration control system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2773118A (en) * | 1953-07-27 | 1956-12-04 | Philco Corp | Television deflection control system |
-
1957
- 1957-02-28 GB GB6712/57A patent/GB881471A/en not_active Expired
-
1958
- 1958-02-27 US US717881A patent/US2912615A/en not_active Expired - Lifetime
- 1958-02-27 DE DEE15425A patent/DE1079103B/en active Pending
- 1958-02-28 FR FR1200791D patent/FR1200791A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2759996A (en) * | 1951-06-30 | 1956-08-21 | Philco Corp | Color television registration control system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1254673B (en) * | 1961-12-25 | 1967-11-23 | Hitachi Ltd | Cathode ray color picture tubes whose screen is provided with a regular arrangement of strips of secondary electron-emitting material |
Also Published As
Publication number | Publication date |
---|---|
US2912615A (en) | 1959-11-10 |
GB881471A (en) | 1961-11-01 |
FR1200791A (en) | 1959-12-24 |
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