EP1052673A2 - Entonnoir pour television à sections rectangulaires paraboliques - Google Patents

Entonnoir pour television à sections rectangulaires paraboliques Download PDF

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Publication number
EP1052673A2
EP1052673A2 EP00109772A EP00109772A EP1052673A2 EP 1052673 A2 EP1052673 A2 EP 1052673A2 EP 00109772 A EP00109772 A EP 00109772A EP 00109772 A EP00109772 A EP 00109772A EP 1052673 A2 EP1052673 A2 EP 1052673A2
Authority
EP
European Patent Office
Prior art keywords
funnel
area
cross
section
glass
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.)
Withdrawn
Application number
EP00109772A
Other languages
German (de)
English (en)
Other versions
EP1052673A3 (fr
Inventor
Peter Dr. Elfner
Anne Schott
Stefan Hergott
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.)
Schott AG
Original Assignee
Schott Glaswerke 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 Schott Glaswerke AG filed Critical Schott Glaswerke AG
Publication of EP1052673A2 publication Critical patent/EP1052673A2/fr
Publication of EP1052673A3 publication Critical patent/EP1052673A3/fr
Withdrawn legal-status Critical Current

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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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/86—Vessels and containers
    • H01J2229/8603—Neck or cone portions of the CRT vessel
    • H01J2229/8606—Neck or cone portions of the CRT vessel characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/87—Means for avoiding vessel implosion

Definitions

  • Such a glass funnel is known from WO 98/07174 A2.
  • Cathode ray tubes are largely used for television sets used. They consist of a glass funnel, which together with the TV screen forms the evacuated space of the tube.
  • the glass funnel itself is divided into three areas: the neck, the Contains electron gun and is arranged cylindrically; the Parabola area around which the deflection coil for guiding the Electron beam is arranged and the round, growing Has cross-sectional area; the funnel body, its cross-sectional area increases steadily and changes from a round to a rectangular shape until the cross-sectional area of the screen has been reached. Under rectangle is here and in the following to understand an area that is substantially rectangular, but can have rounded corners. According to the rectangular shape of the Screen is also the area of the area covered by the electron beam is crossed, rectangular. This leads to the fact that in the area of Glass funnel, in which its cross-section is round, a large proportion of the revenge is not used. Since also the deflection coil for guiding the A large part of the electron beam is attached outside the funnel the energy (about 25%) that is supplied to the coil for the Overcoming the distance to the electron beam by the magnetic field be used.
  • the object of the present invention is now a glass funnel to provide, which makes it possible to save energy and with conventional funnel body is as implosion-proof as possible.
  • a glass funnel for use in Cathode ray tubes which has a funnel neck which is cylindrical a funnel body, the cross section of a round shape in a rectangular shape, with the cross-sectional area being continuous grows, and has a parabolic area between the funnel neck and the funnel body is arranged and its connection cross sections to both the funnel body and the funnel neck essentially are circular, and are characterized in that the parabola area in at least a section between the connection points to the funnel neck and has a rectangular cross section to the funnel body.
  • the length of the area with rectangular Cross-section moves in the centimeter range. Since the Electron beam deflection unit is seated directly on the outer glass contour thus also brought the deflection unit closer to the electron beam which runs inside the funnel.
  • the magnetic field created by the deflection unit is built up to guide the electron beam, must therefore be a smaller one Overcome distance and can be less strong. This will make electrical Energy saved.
  • the glass funnel according to the invention can be used both in 4: 3 and in 16: 9 Realize the format that is common today.
  • the glass funnels according to the invention are only converted to the areas which influences the shape of the parabola area.
  • the further handling of the Glass funnels e.g. Transport or surface processing, can remain unchanged.
  • the aspect ratio advantageously corresponds to the rectangular cross section of the parabola area the aspect ratio of the rectangular cross section of the Funnel body at its end opposite the funnel neck.
  • the funnel body On at this end the funnel body has the aspect ratio of the screen. Since the electron beam also covers an area with this aspect ratio, the deflection coil can be attached so that it is possible from all sides is arranged close to the electron beam when the parabola area in the Section with a rectangular cross section also this aspect ratio having.
  • the Cross-sectional area of the parabolic area continuously.
  • the diagonal of the cross-sectional area over the entire parabola area continuously longer.
  • Figure 1a is the upper half of a longitudinal section through a glass funnel 1, which is connected to a screen 5.
  • the glass funnel 1 will from a funnel neck 2, a parabolic area 3 and a funnel body 4 formed.
  • the funnel neck 2 is an electron gun, not shown arranged around the parabolic area 3 is a deflection coil, not shown arranged.
  • the funnel neck 2 is cylindrical, the parabolic area 3 points in the transition to the funnel neck 2 and in the transition to the funnel body 4 a circular cross-sectional area and a rectangular one in between Cross sectional area.
  • the funnel body 4 points in the transition to Parabola area 3 has a circular cross-sectional area, which, however, is Screen becomes rectangular and grows continuously.
  • Figure 1a shows the area that the electron beam at maximum Deflection by the angle ⁇ , as well as the area covered by the Electron beam is not covered.
  • the section through the parabola area 3 along the line I-I is in Figure 1b shown. It can be seen that with a parabola area 3a with a rectangular Cross section of area 7, which is not covered by the electron beam, is significantly lower. The conversion of the parabola area 3a with rectangular cross-section forms the border of area 6, the is covered by the electron beam. This means that the deflection coil in can be arranged in close proximity to the electron beam and the Sufficient electron beam with a magnetic field of lower energy can be distracted.
  • Figure 3 is the cross section corresponding to Figure 1b through a conventional parabola area. Not the one from the electron beam covered area 7 now makes up a large part of the Total cross-sectional area. Only in the corners of the electron beam covered area 6 is the distance between the electron beam and Deflection coil ideally small.
  • the straight line A indicates the point at which the Funnel neck passes into the parabola area.
  • Tension values are plotted in the funnel neck, to the right of line A die Stress values in the parabola range.
  • the solid line corresponds to one Standard funnel, the dashed line corresponds to that of the invention Funnel.
  • the tension is highest at the transition between the funnel neck and the parabola area.
  • the Parabolic area with a rectangular cross-section can therefore be without Changing the geometry of the funnel body area to existing ones Funnel types and with great benefit on types with large deflection angles of 110 °, 120 ° or above.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Details Of Television Scanning (AREA)
EP00109772A 1999-05-14 2000-05-09 Entonnoir pour television à sections rectangulaires paraboliques Withdrawn EP1052673A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19922225A DE19922225C1 (de) 1999-05-14 1999-05-14 Fernsehtrichter mit abschnittsweise rechteckiger Parabel
DE19922225 1999-05-14

Publications (2)

Publication Number Publication Date
EP1052673A2 true EP1052673A2 (fr) 2000-11-15
EP1052673A3 EP1052673A3 (fr) 2003-10-15

Family

ID=7908054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00109772A Withdrawn EP1052673A3 (fr) 1999-05-14 2000-05-09 Entonnoir pour television à sections rectangulaires paraboliques

Country Status (4)

Country Link
US (1) US6353284B1 (fr)
EP (1) EP1052673A3 (fr)
JP (1) JP2000348644A (fr)
DE (1) DE19922225C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6720727B1 (en) * 1999-06-25 2004-04-13 Samsung Sdi Co., Ltd. Cathode ray tube having deflection power reducing shape
DE10228679B4 (de) * 2002-06-27 2006-08-03 Schott Ag Trichter für Kathodenstrahlröhren

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834349B1 (fr) * 1969-11-04 1973-10-20
JP3737191B2 (ja) * 1996-04-26 2006-01-18 株式会社東芝 陰極線管用偏向ヨークおよび陰極線管装置
JPH09306388A (ja) * 1996-05-14 1997-11-28 Toshiba Corp 陰極線管
US5751103A (en) * 1996-08-13 1998-05-12 Thomson Consumer Electronics, Inc. Color picture tube having improved funnel
JPH10144238A (ja) * 1996-11-12 1998-05-29 Toshiba Corp 陰極線管およびその製造方法
JP3403005B2 (ja) * 1997-06-20 2003-05-06 株式会社東芝 陰極線管装置
KR100330147B1 (ko) * 1998-09-19 2002-09-05 삼성에스디아이 주식회사 음극선관

Also Published As

Publication number Publication date
JP2000348644A (ja) 2000-12-15
DE19922225C1 (de) 2000-11-02
US6353284B1 (en) 2002-03-05
EP1052673A3 (fr) 2003-10-15

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