US3796903A - Connecting member in post focusing type colour picture tubes - Google Patents

Connecting member in post focusing type colour picture tubes Download PDF

Info

Publication number
US3796903A
US3796903A US00273326A US3796903DA US3796903A US 3796903 A US3796903 A US 3796903A US 00273326 A US00273326 A US 00273326A US 3796903D A US3796903D A US 3796903DA US 3796903 A US3796903 A US 3796903A
Authority
US
United States
Prior art keywords
connecting member
post focusing
post
colour picture
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.)
Expired - Lifetime
Application number
US00273326A
Other languages
English (en)
Inventor
E Yamazaki
H Kanai
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.)
Hitachi Ltd
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
Application granted granted Critical
Publication of US3796903A publication Critical patent/US3796903A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J29/92—Means forming part of the tube for the purpose of providing electrical connection to it
    • 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
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/073—Mounting arrangements associated with shadow masks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/0766—Details of skirt or border
    • H01J2229/0772—Apertures, cut-outs, depressions, or the like

Definitions

  • ABSTRACT In a post focusing type colour picture tube of the type wherein a fluorescent screen is connected to an external terminal by means of a connecting member which Aug. 11 1971 Japan 46/71362 I is supported by a post focusing electrode through an [52] us Cl U 313/85 S 313/92 B 313/92 PD insulating member, the insulating member is con- 313/291 nected to the connecting member and the post focus- 51 Im. on. H0lj 29/06 ing eleciwde member by welding brazing [58] Field of Search. 3 3 5 S 92 R 92 B 92 PD instead of using a bonding agent which is liable to be 3 broken by mechanical shock or aging.
  • the post focusing type colour picture tube generally comprises an evacuated envelope including a neck, funnel and a face plate or a panel, a fluorescent screen coated upon the inner surface of the face plate and a shadow mask or a colour selection electrode facing the fluorescent screen. Further, there are provided an electron gun assembly in the neck and a conductive coating on the inner wall of the funnel to act as the funnel electrode.
  • the fluorescent screen, the shadow mask and the funnel electrode are applied with different potentials to establish an intense electrostatic field between the fluorescent screen and the shadow mask so as to focus the electron beam into a high density beam which is caused to impinge upon the fluorescent screen thereby to obtain a bright image.
  • FIG. 1 of the accompanying drawing which shows a perspective view, partly in section of a portion of a prior art post focusing type colour picture tube there is shown an evacuated envelope comprising a panel 1 including a face plate la, and a funnel 2.
  • a fluorescent screen 3 is applied onto the inner surface of the pannel l and a shadow mask 4 provided with a plurality of small perforations 4a is disposed close to the fluorescent screen 3 at a definite distance.
  • a funnel electrode 5 is formed by coating an electroconductive substance onto the inner surface of the funnel 2.
  • the shadow mask 4 is supported by a frame 6 which also supports a shield electrode 7 confronting the inner surface of the funnel 2, the shadow mask 4, frame 6 and shield electrode 7 constituting a post focusing electrode.
  • an insulator rod 8 made of glass, for example, which is bonded at one end to a portion of the post focusing electrode, for example the shield electrode 7 by a bonding agent 9a such as cement and at the other end to connecting pieces 10a and 10b by means of a bonding agent 9b.
  • the outer free end of the connecting piece 10a urges against a conductive coating 12 which is electrically connected to an external terminal 11 hermetically extending through the wall of funnel 2, whereas the outer end of connecting piece 10b urges against the fluorescent screen 3 thereby connecting the same to the external terminal 11.
  • a further object of this invention is to provide a post focusing type colour picture tube having an improved electrical connection between the fluorescent screen and the external terminal, which can overcome various defects of the prior art electrical connection caused by the use of a bonding agent which isliable to be broken by mechanical vibration or aging.
  • a post focusing type colour picture tube of the type comprising an evacuated envelope including a neck, a panel and a funnel provided with an external terminal, an electron gun disposed in said neck, a fluorescent screen formed on the inner surface of said panel, and a post focusing electrode disposed in said envelope characterized in that there are provided an insulator member with its one end secured to said post focusing electrode, and a resilient electroconductive connecting member secured to the other end of said insulating member, said connecting member interconnecting said fluorescent screen and said external terminal, the connections between said insulating member and said post focusing electrode and said resilient insulating member being made by means of welding, brazing or fusion.
  • FIG. 1 is a perspective view, partly in section, of a portion of one example of a prior art post focusing type colour picture tube and FIG. 2 is view similar to FIG. 1 showing a portion of a post focusing type colour picture tube incorporated with an improved electrical connection embodying the invention.
  • FIG. 2 illustrating a preferred embodiment of this invention, component parts corresponding to those shown in FIG. I are designated by the same reference numerals.
  • a letter L shaped supporting member 13 with its horizontal leg 13a secured to a portion of the post focusing electrode, for example frame 6 for supporting the shadow mask 4 as by welding or brazing.
  • the upper end of the vertical leg of the supporting member 13 is embedded in the insulator rod 8 made of a glass bead or ceramic, for example.
  • the material from which supporting member 13 is constituted is not limited to metal provided that it can securely fix insulator rod 8 to the post focusing electrode.
  • a resilient connecting member 14 which in the illustrated example is composed of a metal piece 14a for securing the connecting member to the insulator rod 8 and a pair of oppositely curved leaf springs 14b and 14c for connecting the fluorescent screen 3 to the external terminal 11.
  • the inner ends of leaf springs 14b and 14c are secured to metal piece 14a as by welding or brazing whereas the outer ends of the leaf springs are urged against the conductive film 12 electrode 5, these electrodes may be interconnected so as to assume the same potential.
  • two leaf springs may be combined into a single leaf spring with its center secured to metal piece 14a.
  • the leaf spring may be secured directly to the insulator rod 8 without using metal piece 14a. Any resilient conductive member can be substituted for the leaf springs described above.
  • the glass bead may be fused to these members.
  • the insulator rod may be made of ceramic with its surface metalized and metal members may be brazed or soldered to the metalized surface.
  • the invention is also applicable to a colour picture tube using a colour selection electrode of the slit or grid type.
  • the invention is also applicable to a colour picture tube using an insulator rod firmly secured to any portion of inner members, if possible, though the insulator rod 8 is secured to the supporting member 13 in the above-mentioned embodiments.
  • a post focusing type colour picture tube of the type comprising an evacuated envelope including a neck, a panel and a funnel provided with an external terminal, an electron gun disposed in said neck, a fluorescent screen formed on the inner surface of said panel, and a post focusing electrode disposed in said envelope, the improvement of a connecting member between said fluroescent screen and said external terminal which comprises an insulator member with one end secured to said post focusing electrode, and a resilient electroconductive connecting member secured to the other end of said insulating member, said resilient electroconductive connecting member electrically interconnecting said fluorescent screen and said external terminal, the supporting connections between said insulator member and said post focusing electrode and said resilient connecting member being made by metal means fused to the said ends of said insulating member to bond said ends respectively to said post focusing electrode and said resilient connecting member.
  • post focusing type colour picture tube according to claim 1 wherein said post focusing electrode comprises a perforated shadow mask supported by a frame close to said fluorescent screen and a shield electrode supported by said frame to confront the inner surface of said funnel.
  • said resilient connecting member comprises first and second leaf springs, one end thereof being connected to said conductive supporting member, and the other ends being connected to said external terminal and said fluorescent screen respectively.
  • said resilient connecting member comprises a single leaf spring having two oppositely curved legs, the juncture between said legs being secured to said conductive supporting member and the outer ends of said legs being connected to said external terminal and said fluorescent screen respectively.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
US00273326A 1971-08-11 1972-07-19 Connecting member in post focusing type colour picture tubes Expired - Lifetime US3796903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971071362U JPS51849Y2 (enrdf_load_stackoverflow) 1971-08-11 1971-08-11

Publications (1)

Publication Number Publication Date
US3796903A true US3796903A (en) 1974-03-12

Family

ID=13458298

Family Applications (1)

Application Number Title Priority Date Filing Date
US00273326A Expired - Lifetime US3796903A (en) 1971-08-11 1972-07-19 Connecting member in post focusing type colour picture tubes

Country Status (5)

Country Link
US (1) US3796903A (enrdf_load_stackoverflow)
JP (1) JPS51849Y2 (enrdf_load_stackoverflow)
CA (1) CA959909A (enrdf_load_stackoverflow)
FR (1) FR2148608B1 (enrdf_load_stackoverflow)
GB (1) GB1356223A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002093A1 (en) * 1977-11-18 1979-05-30 Koninklijke Philips Electronics N.V. Colour television display tube
US4710669A (en) * 1985-12-19 1987-12-01 Zenith Electronics Corporation Internal electrical connector for a tension mask tube
EP0652581A1 (en) * 1993-11-04 1995-05-10 ORION ELECTRIC Co., Ltd. A P-F connector structure for a cathode-ray tube

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542453Y2 (enrdf_load_stackoverflow) * 1973-12-27 1979-02-01
JPS566856Y2 (enrdf_load_stackoverflow) * 1976-04-14 1981-02-14
JPS5979795U (ja) * 1982-11-18 1984-05-30 三菱電機株式会社 冷蔵庫用押釦スイツチ
JPS59149632A (ja) * 1983-01-28 1984-08-27 Toshiba Corp カラ−受像管

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002093A1 (en) * 1977-11-18 1979-05-30 Koninklijke Philips Electronics N.V. Colour television display tube
US4710669A (en) * 1985-12-19 1987-12-01 Zenith Electronics Corporation Internal electrical connector for a tension mask tube
EP0652581A1 (en) * 1993-11-04 1995-05-10 ORION ELECTRIC Co., Ltd. A P-F connector structure for a cathode-ray tube

Also Published As

Publication number Publication date
FR2148608B1 (enrdf_load_stackoverflow) 1977-08-05
DE2239609A1 (de) 1973-02-22
FR2148608A1 (enrdf_load_stackoverflow) 1973-03-23
GB1356223A (en) 1974-06-12
JPS4828362U (enrdf_load_stackoverflow) 1973-04-06
JPS51849Y2 (enrdf_load_stackoverflow) 1976-01-12
DE2239609B2 (de) 1976-03-04
CA959909A (en) 1974-12-24

Similar Documents

Publication Publication Date Title
US3284655A (en) Cathode ray tube mesh assembly supported between envelope sections
US3354340A (en) Cap-shaped control electrode securing cathode by thin supporting members
US3502942A (en) Post-deflection-focus cathode-ray tube
US3796903A (en) Connecting member in post focusing type colour picture tubes
US4403169A (en) Cathode suspension means for cathode ray tube electron gun
GB2157071A (en) Color image display system having an external magnetic shield
US3541373A (en) Cathode ray tube with bifurcated contact spring between the shadow mask frame and the internal conductive coating
US4358703A (en) Cathode-ray tube
US2508001A (en) High-voltage cathode-ray tube corona ring
US2843777A (en) Cathode-ray tubes
US3560779A (en) Shadow mask type color picture tube with a fine mesh flexible particle shield between the gun and target portions
US2452620A (en) Electrode support in television tubes
US4745328A (en) CRT tension mask support structure
US3027479A (en) Electron guns
US2059575A (en) Electronic indicating device
EP0295732A1 (en) Method of manufacturing an electron gun
CA1187541A (en) Cathode-ray tube
JPS59167941A (ja) 陰極線管
US3188506A (en) Cathode ray tube with signal plate connected to contact ring having envelope diameter
US2939981A (en) Grid frame support structures for cathode ray tubes
JP2524660B2 (ja) ディスプレイ装置
US3846658A (en) Post acceleration type cathode ray tube with perforated hollow collector electrode adjacent shadow mask
US3771003A (en) Shielded cathode ray tube electron gun
US3746917A (en) Camera tube with accurate field mesh mounting means
US3801848A (en) Television camera tube with mounting assembly for grid adjacent photoconductor