JPS57199152A - Cathode-ray tube - Google Patents

Cathode-ray tube

Info

Publication number
JPS57199152A
JPS57199152A JP8508581A JP8508581A JPS57199152A JP S57199152 A JPS57199152 A JP S57199152A JP 8508581 A JP8508581 A JP 8508581A JP 8508581 A JP8508581 A JP 8508581A JP S57199152 A JPS57199152 A JP S57199152A
Authority
JP
Japan
Prior art keywords
spot
back end
picture
picture surface
beam spot
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
Application number
JP8508581A
Other languages
Japanese (ja)
Inventor
Haruaki Wada
Tsutomu Tachibana
Takashi Toyama
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP8508581A priority Critical patent/JPS57199152A/en
Publication of JPS57199152A publication Critical patent/JPS57199152A/en
Pending legal-status Critical Current

Links

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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/56—Correction of beam optics
    • H01J2229/563—Aberrations by type
    • H01J2229/5637—Colour purity

Abstract

PURPOSE:To provide a cathode-ray tube which forms a long spot deformed perpendicularly to the scanning direction upon a picture surface, and which can correct not only the inclination of the spot caused when electron beams are deflected toward the peripheral part of the picture surface but also the distortion of the spot itself. CONSTITUTION:A first magnetic tetrode 20, which is used for correcting the inclination of a beam spot at the peripheral part of the picture surface of a CRT1, is installed at a neck 2 of the CRT1, for example, near the position of the Z-axis direction of a third grid electrode 8. On the other hand, a second magnetic tetrode 30, which is used for correcting an S-shaped distortion of the above beam spot, is installed near the back end of the Z-axis direction of a deflecting part 15, for example, in the space formed between the back end of a vertical deflection coil 16 and the back end of a horizontal deflection coil 17. Therefore, when this is applied to, especially, a beam-indexing CRT which has not any aperture grill or shadow mask, the beam spot is securely included by a fluorescent stripe corresponding to a display cell formed on a fluorescent screen. As a result, the quality of the picture can be increased by preventing any deterioration of the color purity and the resolution.
JP8508581A 1981-06-03 1981-06-03 Cathode-ray tube Pending JPS57199152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8508581A JPS57199152A (en) 1981-06-03 1981-06-03 Cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8508581A JPS57199152A (en) 1981-06-03 1981-06-03 Cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS57199152A true JPS57199152A (en) 1982-12-07

Family

ID=13848763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8508581A Pending JPS57199152A (en) 1981-06-03 1981-06-03 Cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS57199152A (en)

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