MY115252A - Color cathode- ray tube having internal magnetic shield - Google Patents

Color cathode- ray tube having internal magnetic shield

Info

Publication number
MY115252A
MY115252A MYPI97004917A MYPI9704917A MY115252A MY 115252 A MY115252 A MY 115252A MY PI97004917 A MYPI97004917 A MY PI97004917A MY PI9704917 A MYPI9704917 A MY PI9704917A MY 115252 A MY115252 A MY 115252A
Authority
MY
Malaysia
Prior art keywords
opening
magnetic shield
internal magnetic
adjacent
creased
Prior art date
Application number
MYPI97004917A
Inventor
Mutsumi Maehara
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of MY115252A publication Critical patent/MY115252A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/0007—Elimination of unwanted or stray electromagnetic effects
    • H01J2229/003—Preventing or cancelling fields entering the enclosure

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

A COLOR CATHODE-RAY TUBE INCLUDING A PANEL PORTION (1), A NECK PORTION (2) AND A FUNNEL PORTION (3) CONNECTING THESE TWO PORTIONS AND HAVING AN INTERNAL MAGNETIC SHIELD (7), WHEREIN THE INTERNAL MAGNETIC SHIELD IS DISPOSED IN THE FUNNEL PORTION AND MADE OF A SUBSTANTIALLY QUADRANGULAR PYRAMID-SHAPED FRAME STRUCTURE (14) WHICH HAS A SUBSTANTIALLY RECTANGULAR FIRST OPENING (20) OF SMALL DIAMETER AT ONE END ADJACENT TO AN ELECTRON GUN (12) AND A SUBSTANTIALLY RECTANGULAR SECOND OPENING (21) OF LARGE DIAMETER AT THE OTHER END ADJACENT TO A SHADOW MASK (5) AND CREASED LINES FORMED BETWEEN CORRESPONDING CORNERS (201, 212) OF THE FIRST AND SECOND OPENINGS (20, 21), SIDE FACES OF THE INTERNAL MAGNETIC SHIELD OPPOSITE TO EACH OTHER BEING FORMED WITH SUBSTANTIALLY V-SHAPED NOTCHES (20A, 20B) RESPECTIVELY IN THE PORTIONS THEREOF ADJACENT TO THE FIRST OPENING (20), AND EACH OF THE CREASED LINES (19A) OF THE INTERNAL MAGNETIC SHIELD (7) IS FORMED IN SUCH A MANNER THAT AN END OF AN IMAGINARY LINE EXTENSION OF THE CREASED LINE ADJACENT TO THE SECOND OPENING (21) IS LOCATED ON A PROJECTED PLANE PARALLEL TO THE SECOND OPENING AT A POINT SHIFTED BY A PREDETERMINED LENGTH FROM THE CORRESPONDING CORNER (212) OF THE SECOND OPENING (21) IN THE DIRECTION OF SIDE OF THE SECOND OPENING AND A SEGMENT IS MADE BY CONNECTING A PREDETERMINED POINT ON A LINE CONNECTING BETWEEN THE END OF THE IMAGINARY LINE EXTENSION AND THE CORRESPONDING CORNER OF THE FIRST OPENING TO THE CORRESPONDING CORNER (201) OF THE SECOND OPENING (20) SO AS TO FORM A PART OF THE CREASED LINE ADJACENT TO THE SECOND OPENING.FIG. 2A
MYPI97004917A 1996-10-18 1997-10-18 Color cathode- ray tube having internal magnetic shield MY115252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8276244A JPH10125248A (en) 1996-10-18 1996-10-18 Color cathode ray tube with internal magnetic shield

Publications (1)

Publication Number Publication Date
MY115252A true MY115252A (en) 2003-04-30

Family

ID=17566719

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI97004917A MY115252A (en) 1996-10-18 1997-10-18 Color cathode- ray tube having internal magnetic shield

Country Status (4)

Country Link
US (3) US6020678A (en)
JP (1) JPH10125248A (en)
KR (1) KR100253060B1 (en)
MY (1) MY115252A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10125248A (en) * 1996-10-18 1998-05-15 Hitachi Ltd Color cathode ray tube with internal magnetic shield
TW402731B (en) * 1997-09-12 2000-08-21 Hitachi Ltd Color cathode ray tube having an improved internal magnetic shield
TW497115B (en) * 1998-04-28 2002-08-01 Hitachi Ltd Cathode ray tube
KR100307449B1 (en) * 1999-01-13 2001-12-28 김순택 Functional film used for cathode ray tube
JP2001185043A (en) * 1999-12-28 2001-07-06 Matsushita Electric Ind Co Ltd Cathode ray tube
US6720723B2 (en) * 2000-03-16 2004-04-13 Matsushita Electric Industrial Co., Ltd. Cathode ray tube for achieving small electron beam landing deviation
US6680829B2 (en) * 2000-09-13 2004-01-20 Seagate Technology Llc MR structures for high areal density reader by using side shields
KR100350621B1 (en) * 2000-12-15 2002-08-30 엘지전자주식회사 The CRT Having Improved Inner shield

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2746635B2 (en) * 1989-02-20 1998-05-06 松下電子工業株式会社 Color picture tube
JP3153915B2 (en) 1991-08-07 2001-04-09 ソニー株式会社 Color cathode ray tube
BE1007683A3 (en) 1993-10-29 1995-09-12 Philips Electronics Nv Colour tube with external magnetic shielding.
JP3480977B2 (en) 1993-12-24 2003-12-22 ソニー株式会社 Internal magnetic shield and cathode ray tube using the same
JPH08287838A (en) 1995-04-07 1996-11-01 Sony Corp Cathode ray tube
JPH10125248A (en) * 1996-10-18 1998-05-15 Hitachi Ltd Color cathode ray tube with internal magnetic shield

Also Published As

Publication number Publication date
KR19980032968A (en) 1998-07-25
US20010000645A1 (en) 2001-05-03
US6020678A (en) 2000-02-01
KR100253060B1 (en) 2000-04-15
US6177758B1 (en) 2001-01-23
US6339282B2 (en) 2002-01-15
JPH10125248A (en) 1998-05-15

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