DE655945C - Arrangement for deflecting cathode rays, in particular for television purposes - Google Patents

Arrangement for deflecting cathode rays, in particular for television purposes

Info

Publication number
DE655945C
DE655945C DET44350D DET0044350D DE655945C DE 655945 C DE655945 C DE 655945C DE T44350 D DET44350 D DE T44350D DE T0044350 D DET0044350 D DE T0044350D DE 655945 C DE655945 C DE 655945C
Authority
DE
Germany
Prior art keywords
deflection
arrangement
cathode rays
television
television purposes
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
DET44350D
Other languages
German (de)
Inventor
Rudolf Urtel
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.)
Telefunken AG
Original Assignee
Telefunken 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 Telefunken AG filed Critical Telefunken AG
Priority to DET44350D priority Critical patent/DE655945C/en
Application granted granted Critical
Publication of DE655945C publication Critical patent/DE655945C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/237—Distortion correction, e.g. for pincushion distortion correction, S-correction using passive elements, e.g. diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Description

Anordnung zur Ablenkung von Kathodenstrahlen, insbesondere für die Zwecke des Fernsehens Eine elektrostatische Ablenkung von Kathodenstrahlen bereitet insbesondere bei Hochvakuumröhr:en wegen der großen Strahldurchmesser Schwierigkeiten hinsichtlich der Fleckschärfc, da das Feld zwischen den Ablenkplatten eine Zylinderlinse darstellt. Ein schwacher Krümmungsradius in dieser Zyl:inde;rfnse ist nur durch große Plattenabstände und damit große Ablenkspannungen zu erreichen. Wird gleichzeitig die Fokussierung durch ein, elektrostatisches Linsensystem bewirkt, so entstehen wieder Schwierigkeiten (Deformation der Linse) dadurch, daß die Spannungen an .den Ablenkplatten mit denn Spannungen an den Linsenelektroden in gleicher Größenordnung liegen.Arrangement for deflecting cathode rays, especially for the Television purposes An electrostatic deflection of cathode rays prepares Difficulties especially with high vacuum tubes because of the large beam diameter in terms of spot sharpness, since the field between the baffles is a cylindrical lens represents. A weak radius of curvature in this cylinder: inde; rfnse is only through to achieve large plate spacings and thus large deflection voltages. Will be at the same time the focusing is effected by an electrostatic lens system again difficulties (deformation of the lens) due to the fact that the tensions on .den Deflection plates with the voltages on the lens electrodes of the same order of magnitude lie.

Die Schwierigkeiten werden im erheblichem Maße bei magnetischer Ablenkung umgangen. Jedoch treten bei der magnetischen Ablenkung von Kathodenstrahlen, beispielsweisse beten. Fernsehen, untrer Benutzung von Verfahren, die Beine Modulatilon der Schreibgeschwindigkeit erfordern, dadurch Schwierigkeiten auf, daß der Spulenstrom schnellen Änderungen nicht folgen kann.The difficulties become significant with magnetic deflection bypassed. However, occur in the magnetic deflection of cathode rays, for example pray. Television, using procedures, the legs modulating the writing speed require difficulties in that the coil current changes rapidly can not follow.

Gemäß der Erfindung wird daher vorgeschlagen, zur Ablenkung von Kathodenstrahlen, insbesondere für die Zwecke des Fernsehens, bei Anwendung der obienerwähnten Verfahren die niederen Ablenkfnequenzkompionenten über elektromagnetische, die höheren Komponenten der Ablenkung derselben Ablenkri,chtung dab gier über elektrostatische Ablenkorgane auf denn Kathodenstrahl einwirken zu lassen. Die in diiesem. Falle auftretenden Ablenkspannungen sind klein, so daß die Zylinderlinse des Ablenkfeldes noch nicht nennenswert stören kann bzw. die Konzentrationsioptik noch nicht be-.einfiußt. Ebenso sind die bereitzustellenden Betrlebsspannumgen (Netzanschlußgerät) klein, so daß der bei rein statischer Ablenkung niotwendige Bedarf an Hochspannungskondensatoren und Transformatoren vermieden wird.According to the invention it is therefore proposed for the deflection of cathode rays, in particular, for the purposes of television, when using the obienerwähnten method, the lower Ablenkfnequenzkompionenten via electromagnetic, the higher components of the deflection thereof Ablenkri, rect dab yaw act via electrostatic deflector means to for cathode ray to leave . The one in this. Any deflection voltages that occur are small, so that the cylindrical lens of the deflection field cannot yet noticeably interfere or does not yet affect the concentration optics. Likewise, the operational voltages to be provided (mains connection device) are small, so that the need for high-voltage capacitors and transformers, which is unnecessary in the case of purely static deflection, is avoided.

Claims (1)

PATENTANSPRUCH Anordnung zur Ablenkung von Katho.d:ens@trahlen, nsbesondere für die Zwecke des Fernsehens, bei Verfahren, die eine Modulation der Schreibgeschwindigkeit erfordern, dadurch gekennzeichnet, daß die niederen Ablenkfnequenzkomp@onenten über elektromagnetische, die höheren. Koznponenten der Ablenkung derselben Ablenkrichtung dagegen über elektrostatische Ablenkorgane auf den Kathodenstrahl einwirken.PATENT CLAIM Arrangement for the deflection of cathod for the purpose of television, in procedures that modulate the writing speed require, characterized in that the lower deflection frequency components over electromagnetic, the higher. Constituents of the deflection in the same direction of deflection on the other hand, act on the cathode ray via electrostatic deflectors.
DET44350D 1934-08-22 1934-08-22 Arrangement for deflecting cathode rays, in particular for television purposes Expired DE655945C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET44350D DE655945C (en) 1934-08-22 1934-08-22 Arrangement for deflecting cathode rays, in particular for television purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET44350D DE655945C (en) 1934-08-22 1934-08-22 Arrangement for deflecting cathode rays, in particular for television purposes

Publications (1)

Publication Number Publication Date
DE655945C true DE655945C (en) 1938-01-26

Family

ID=7561731

Family Applications (1)

Application Number Title Priority Date Filing Date
DET44350D Expired DE655945C (en) 1934-08-22 1934-08-22 Arrangement for deflecting cathode rays, in particular for television purposes

Country Status (1)

Country Link
DE (1) DE655945C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE958659C (en) * 1950-08-14 1957-02-21 Hazeltine Corp Television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE958659C (en) * 1950-08-14 1957-02-21 Hazeltine Corp Television receiver

Similar Documents

Publication Publication Date Title
DE2223369C3 (en) In-line cathode ray tube
DE2449000A1 (en) ELECTRON BEAM COLUMN WITH DEFLECTOR
DE618975C (en) Cathode ray image decomposer
DE1762569A1 (en) Color picture tubes with correction devices for the electron beams
DE655945C (en) Arrangement for deflecting cathode rays, in particular for television purposes
DE715021C (en) Electric electron collecting lens for high vacuum electron beam tubes
DE2428047A1 (en) CATHODE RAY TUBE
DE2205162A1 (en) Electron gun
DE3121456A1 (en) "IMAGE TUBES WITH ENLARGED HORIZONTAL DEFLECTION"
DE930996C (en) Cathode ray tube
DE839837C (en) Cathode ray tube
DE3213498A1 (en) IMAGE DISPLAY DEVICE
DE1912271A1 (en) Color picture tubes
DE729003C (en) Device for generating several electron beams in a cathode ray tube
DE1098627B (en) Electron-optical electrode arrangement for cathode ray tubes
DE691572C (en) Electrostatic deflection device for cathode ray tubes
DE914525C (en) Braun tube with electrostatic beam influence
DE740924C (en) Cathode ray tubes with an arrangement for concentrating the electrons emanating from the cathode and aligning them with an aperture
DE1200445B (en) Cathode ray tubes with deflection modulation
DE1762099A1 (en) Color picture tube system
DE703696C (en) Device for deflecting electron beams, e.g. B. in Braunschen Roehren
DE727074C (en) Electron beam oscilloscope for optional use as a polar coordinate oscilloscope and as a normal oscilloscope
GB505355A (en) Improvements in or relating to cathode ray deflection
DE733958C (en) High-voltage image converter tube with photosensitive cathode, fluorescent screen and electron lenses
DE2142436A1 (en) TV camera tubes and provided with one of the like television camera tubes before direction