EP1162644A2 - Conception d'entonnoir de tube mince avec entonnoir amélioré - Google Patents

Conception d'entonnoir de tube mince avec entonnoir amélioré Download PDF

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Publication number
EP1162644A2
EP1162644A2 EP01113334A EP01113334A EP1162644A2 EP 1162644 A2 EP1162644 A2 EP 1162644A2 EP 01113334 A EP01113334 A EP 01113334A EP 01113334 A EP01113334 A EP 01113334A EP 1162644 A2 EP1162644 A2 EP 1162644A2
Authority
EP
European Patent Office
Prior art keywords
funnel
reinforcement rib
tube
curved
panel
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Withdrawn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
EP01113334A
Other languages
German (de)
English (en)
Other versions
EP1162644A3 (fr
Inventor
Stephen Thomas c/o THOMSON multimedia Opresko
Harry Robert c/o THOMSON multimedia Swank
Richard Wayne c/o THOMSON multimedia Hutzler
Doreen May c/o THOMSON multimedia Fulmer
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.)
Thomson Licensing SAS
Original Assignee
Thomson Licensing SAS
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 Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of EP1162644A2 publication Critical patent/EP1162644A2/fr
Publication of EP1162644A3 publication Critical patent/EP1162644A3/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Withdrawn legal-status Critical Current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
    • 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
    • H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
    • 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

Definitions

  • This invention relates generally to the field of cathode ray tubes, and, in particular, to the funnel portion of the cathode ray tube.
  • SLIM tubes have put additional stress constraints on the funnel portion of the tube.
  • a SLIM tube is one where the axial depth of the tube is substantially reduced, compared to a conventional picture tube, especially in the funnel portion.
  • a conventional tube may have a deflection angle up to about 110 degrees, whereas a SLIM tube has a substantially larger deflection angle.
  • the larger deflection angle is required because as the tube depth is reduced, electron guns are positioned closer to the front faceplate panel of the tube.
  • the reduction of the tube depth is achieved by making the funnel portion and or the panel portion of the tube considerably shorter in the axial direction. As funnel depth is reduced, stresses in the funnel glass, caused by vacuum loading, are increased. The increased stresses result in a weaker tube envelope.
  • the present invention is directed at reinforcement rib features in the glass funnel structure of a cathode ray tube.
  • the rib features increase the tube's ability to withstand forces due to vacuum loading, manufacturing processes and safety testing, while keeping the tube weight minimal.
  • the invention is especially useful in a SLIM tube design, or a tube with a large deflection angle, where the depth between the front faceplate panel and neck is reduced about 3 to 4 inches, compared to a conventional depth picture tube.
  • the present cathode ray tube has a glass envelope including a faceplate panel, a neck end, and a funnel connected between the panel and the neck end.
  • the funnel has a main body portion and a yoke region, with the main body portion including at least one reinforcement rib.
  • the reinforcement rib includes a curved ridge bend in the funnel that is curved outward away from a vacuum side of said funnel.
  • the reinforcement rib includes a curved mound-like increase in thickness of the funnel.
  • the curved thickness can be directionally oriented inwardly towards the vacuum side, outwardly away from the vacuum side, or both.
  • the reinforcement rib can extend along the funnel in a direction from the neck end towards the faceplate panel, along the funnel in a direction transverse to that from the panel to the neck end, or a combination of both directions.
  • FIG. 1 shows a cathode ray tube having a glass envelope 10, comprising a faceplate panel and tubular neck 13 connected by a funnel.
  • the funnel 12 includes a main body portion 12' and a yoke region 12" sealed to the neck 13.
  • a plurality of reinforcement ribs 23 are located in the main body portion 12' of the funnel 12.
  • the glass sidewall in the yoke region 12" is made thick enough to accommodate the higher tensile stress in the yoke region 12".
  • the main body portion 12 ' being much larger than the yoke region 12" is the logical area to remove glass and achieve substantial glass reduction. Therefore, thinning of glass in the main body portion 12' requires reinforcement against tensile stress.
  • the ribs 23 shown are oriented longitudinally from the neck 13 toward the front faceplate panel 11 along the main body portion 12'.
  • Reference to rib 23 is merely exemplary.
  • Other rib details 33, 43, 53 and 63 can be employed on the funnel glass alone or in combination with each other.
  • FIGS. 2-6 cross-section elevation views of different reinforcement rib configurations are shown.
  • an external reinforcement rib 23 in the glass is formed by a curved ridge bend in the glass directed outwardly away from the vacuum side 21 towards the outside or ambient air side 22 of the funnel.
  • bend transitions 24-27 to and from the rib 23 are gradual and curved, as opposed to acute angular changes where stress from vacuum loading would concentrate.
  • the cross-section detail 30 of FIG. 3 shows a reverse ridge bend 33 curved inward toward the vacuum side 21 of the glass and away from the ambient air side 22.
  • a rib 43 is formed by increasing the funnel glass thickness with a mound-like or curved protrusion extending inwardly towards the vacuum side 21 and away from the ambient air side 22.
  • a rib 53 is formed by increasing the funnel glass thickness with a mound-like or curved protrusion extending outwardly in a direction away from the vacuum side 21 and towards the ambient air side 22 of the funnel.
  • a rib 63 is formed with the glass thickened with mound-like or curved protrusions 63 towards both the inside or vacuum side and the outside or ambient air sides 21, 22 of the funnel glass.
  • FIGS. 7-9 exemplary locations and orientation of the reinforcement rib features of FIGS. 2-6 on the funnel portion of the cathode ray tube are illustrated in FIGS. 7-9.
  • Each of the various rib configurations 23, 33, 43, 53 and 63 can be employed alone or in combination with each other on the funnel.
  • rib detail 23 and rib detail 43 can be located simultaneously at different locations on the same funnel glass.
  • the ribs 23 are oriented transverse to the longitudinal direction of the funnel surface.
  • cathode ray tube 80 of FIG. 8 there are ribs 23' oriented in the longitudinal direction along the funnel surface and ribs 23 oriented in a direction transverse to the longitudinal direction of the funnel surface.
  • the transverse and longitudinal oriented ribs 23', 23 are configured in an exemplary hub and spoke pattern, but other interconnected rib patterns can be used.
  • Curvature in the funnel portion of a typical tube serves to cause forces acting on the glass funnel to induce the greatest stress or strain in the direction of the glass surface.
  • curvature in the funnel portion is reduced which tends to concentrate stress in funnel portions having greatest angular or directional change and induces greater bending stress in funnel portions that become less curved as the tube depth is reduced.
  • Strains in the tube glass from vacuum loading are tensile in nature. Reducing these strains can be accomplished by the inventive rib features, shown in FIGS. 2-6, on the funnel. For example, where tensile stress induced by a vacuum is 1500 psi, incorporating ribs to the funnel glass can reduce that tensile stress to a level below 1000 psi, which is acceptable and safe.
  • the inventive reinforcement ribs properly located on the tube's funnel surface increase the tube's ability to withstand forces due to vacuum loading, manufacturing processes and safety testing.
  • the rib features require a minimal amount of additional glass to achieve the added glass strength.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
EP01113334A 2000-06-02 2001-06-01 Conception d'entonnoir de tube mince avec entonnoir amélioré Withdrawn EP1162644A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58710200A 2000-06-02 2000-06-02
US587102 2000-06-02

Publications (2)

Publication Number Publication Date
EP1162644A2 true EP1162644A2 (fr) 2001-12-12
EP1162644A3 EP1162644A3 (fr) 2003-11-05

Family

ID=24348356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01113334A Withdrawn EP1162644A3 (fr) 2000-06-02 2001-06-01 Conception d'entonnoir de tube mince avec entonnoir amélioré

Country Status (5)

Country Link
EP (1) EP1162644A3 (fr)
JP (1) JP2002033060A (fr)
KR (1) KR20010110113A (fr)
CN (1) CN1328338A (fr)
MX (1) MXPA01005525A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003034461A1 (fr) * 2001-10-17 2003-04-24 Asahi Glass Company, Limited Entonnoir en verre pour tube cathodique, et tube cathodique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100770169B1 (ko) * 2006-01-27 2007-10-26 주식회사 팬택 굴절형 힌지장치 및 그 힌지장치를 사용한 개인휴대단말기
CN110990945B (zh) * 2019-11-15 2022-05-06 武汉理工大学 一种汽车车顶盖加强筋仿生结构设计方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2232098A (en) * 1938-02-11 1941-02-18 Hygrade Sylvania Corp Cathode ray tube
FR867824A (fr) * 1938-09-07 1941-11-29 Telefunken Gmbh Tube de braun, notamment pour télévision
GB786640A (en) * 1953-10-23 1957-11-20 Philips Electrical Ind Ltd Improvements in or relating to a vacuum vessel such as a cathode ray tube or a largerectifying tube having a metal wall which is made at least partly from thin sheet metal
US2825129A (en) * 1951-01-20 1958-03-04 Mcdowell Mfg Co Television cone construction
US2969162A (en) * 1957-04-22 1961-01-24 Kimble Glass Co Molded picture tube
JPH03263738A (ja) * 1990-03-13 1991-11-25 Mitsubishi Electric Corp 陰極線管装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2232098A (en) * 1938-02-11 1941-02-18 Hygrade Sylvania Corp Cathode ray tube
FR867824A (fr) * 1938-09-07 1941-11-29 Telefunken Gmbh Tube de braun, notamment pour télévision
US2825129A (en) * 1951-01-20 1958-03-04 Mcdowell Mfg Co Television cone construction
GB786640A (en) * 1953-10-23 1957-11-20 Philips Electrical Ind Ltd Improvements in or relating to a vacuum vessel such as a cathode ray tube or a largerectifying tube having a metal wall which is made at least partly from thin sheet metal
US2969162A (en) * 1957-04-22 1961-01-24 Kimble Glass Co Molded picture tube
JPH03263738A (ja) * 1990-03-13 1991-11-25 Mitsubishi Electric Corp 陰極線管装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 073 (E-1169), 21 February 1992 (1992-02-21) -& JP 03 263738 A (MITSUBISHI ELECTRIC CORP), 25 November 1991 (1991-11-25) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003034461A1 (fr) * 2001-10-17 2003-04-24 Asahi Glass Company, Limited Entonnoir en verre pour tube cathodique, et tube cathodique
US6919677B2 (en) 2001-10-17 2005-07-19 Asahi Glass Company, Limited Glass funnel for a cathode ray tube and cathode ray tube

Also Published As

Publication number Publication date
MXPA01005525A (es) 2003-08-20
KR20010110113A (ko) 2001-12-12
CN1328338A (zh) 2001-12-26
EP1162644A3 (fr) 2003-11-05
JP2002033060A (ja) 2002-01-31

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