JPS5471926A - Color picture tube unit - Google Patents

Color picture tube unit

Info

Publication number
JPS5471926A
JPS5471926A JP13933277A JP13933277A JPS5471926A JP S5471926 A JPS5471926 A JP S5471926A JP 13933277 A JP13933277 A JP 13933277A JP 13933277 A JP13933277 A JP 13933277A JP S5471926 A JPS5471926 A JP S5471926A
Authority
JP
Japan
Prior art keywords
electrode
shaped
focusing
electron
picture tube
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.)
Granted
Application number
JP13933277A
Other languages
Japanese (ja)
Other versions
JPS6158940B2 (en
Inventor
Hiroto Nakamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP13933277A priority Critical patent/JPS5471926A/en
Publication of JPS5471926A publication Critical patent/JPS5471926A/en
Publication of JPS6158940B2 publication Critical patent/JPS6158940B2/ja
Granted 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
    • H01J29/566—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for correcting aberration

Abstract

PURPOSE:To reduce the shape distortion of a beam spot obtained on a screen by providing an auxiliary electrode in a focusing electrode to applying the dynamic focus voltage. CONSTITUTION:Cathode 4 mounted in cup-shaped control electrode 3 froms an electron emission part, and cup-shaped accelerating electrode 5, focusing electrode 6 and anode 7 are successively arranged coaxially in front of electrode 3, and flat ring-shaped auxiliary electrode 8 is arranged in electrode 6 and is insulated from other electrodes. Electrode 8 has oblong square-shaped aperture 9 to pass electron beam. Three electron guns equipped with this electrode structure are arranged on the horizontal axis, thereby constituting a three-electron gun. When the focusing voltage and the parabolic-waveform dynamic focus voltage are applied to electrode 6 and electrode 8 respectively at a picture tube operating time, beam spots which appear at the center and the circumference on the screen have a shape approximating a perfect circle.
JP13933277A 1977-11-18 1977-11-18 Color picture tube unit Granted JPS5471926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13933277A JPS5471926A (en) 1977-11-18 1977-11-18 Color picture tube unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13933277A JPS5471926A (en) 1977-11-18 1977-11-18 Color picture tube unit

Publications (2)

Publication Number Publication Date
JPS5471926A true JPS5471926A (en) 1979-06-08
JPS6158940B2 JPS6158940B2 (en) 1986-12-13

Family

ID=15242842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13933277A Granted JPS5471926A (en) 1977-11-18 1977-11-18 Color picture tube unit

Country Status (1)

Country Link
JP (1) JPS5471926A (en)

Also Published As

Publication number Publication date
JPS6158940B2 (en) 1986-12-13

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