EP0180040B1 - Farbbildröhre - Google Patents

Farbbildröhre Download PDF

Info

Publication number
EP0180040B1
EP0180040B1 EP85112262A EP85112262A EP0180040B1 EP 0180040 B1 EP0180040 B1 EP 0180040B1 EP 85112262 A EP85112262 A EP 85112262A EP 85112262 A EP85112262 A EP 85112262A EP 0180040 B1 EP0180040 B1 EP 0180040B1
Authority
EP
European Patent Office
Prior art keywords
picture tube
colour picture
shadow mask
holding members
parts
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
Application number
EP85112262A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0180040A2 (de
EP0180040A3 (en
Inventor
Otto Brunn
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.)
Nokia Deutschland GmbH
Original Assignee
Standard Elektrik Lorenz AG
Nokia Graetz GmbH
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 Standard Elektrik Lorenz AG, Nokia Graetz GmbH filed Critical Standard Elektrik Lorenz AG
Publication of EP0180040A2 publication Critical patent/EP0180040A2/de
Publication of EP0180040A3 publication Critical patent/EP0180040A3/de
Application granted granted Critical
Publication of EP0180040B1 publication Critical patent/EP0180040B1/de
Expired 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
    • H01J29/02—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

Definitions

  • the invention relates to a color picture tube according to the preamble of claim 1.
  • the two parts of the holding members are not firmly connected to one another; they are held by feathers and flags.
  • the mask is placed in the shield trough with the interposition of a distance gauge and then the parts of the holding members are fastened together.
  • the invention is therefore based on the object to design the color picture tube of the type mentioned in such a way that a tolerance compensation between the shadow mask and the pins in the screen trough when it is first inserted is possible in a simple manner and with simple holding members.
  • Fig. 1 only the screen trough 1 with the shadow mask 2 is shown from a conventional color picture tube.
  • the x-axis, the y-axis and the diagonals D1 and D2 are shown in this representation.
  • the area on the edge 4 of the shield trough 1, on which the shield trough is connected to the cone by means of glass solder, is designated by 3.
  • the screen trough 1 carries the luminescent layer, not shown, on its inside.
  • pins 5 are arranged which support the shadow mask 2 via holding members 6. The holding members 6 engage on the edge 7 of the shadow mask 2.
  • the axis of symmetry (longitudinal axis) of the color picture tube is at the intersection of the x-axis with the y-axis perpendicular to the plane of the drawing.
  • the mask 2 does not have to be held in the corners of the screen trough 1, but can also be provided at the intersections of the x and y axes with the edge 7 of the shadow mask 2 and the edge 4 of the screen trough.
  • FIG. 1 A first embodiment of a holding member 6 is shown in two views.
  • the holding member 6 consists of two parts 6a and 6b, some of which lie one above the other.
  • the part 6a is provided at its free end with the approximately triangular hole 8 through which the pin 5 engages.
  • At the free end of part 6b there is a recess 9 lying symmetrically to the longitudinal axis of the holding member 6, so that the part 6b ends in two prongs 10a and 10b.
  • These tines 10a, 10b are connected to the edge 7 of the shadow mask 2.
  • the parts 6a and 6b are arranged such that they can move with respect to one another, which is achieved by a swivel joint present in the overlapping region of the parts.
  • the swivel joint consists of a tubular rivet 11.
  • the free end of part 6a is much narrower than its area covered by part 6b.
  • the part 6a has two shoulders 13, the edge of which lies on an arc.
  • the circular arc is determined by a radius extending from the tubular rivet 11 to the shoulders 13.
  • In the middle of the shoulder 13 there is one of the guide tabs 12 which surround the edge of the part 6b.
  • This edge of part 6b forms part of an arc of a circle which is determined by the radius mentioned.
  • the longitudinal axes of the guide tabs 12 extend through the tubular rivet 11. This arrangement of the guide tabs 12 holds the two parts 6a and 6b of the holding member 6 in approximately one plane and releases the tubular rivet 11. Stead without the rotary movement of the parts against each other would be hindered or restricted.
  • a second embodiment of a holding member 6 is shown in two views, in which compared to the first embodiment, the pivot joint is made simpler.
  • the part 6a has an incision 14 at its end covered by the part 6b and the recess 9 between the prongs 10a, 10b in part 6b extends to the bottom of the incision 14.
  • the recess 9 is delimited by an arc near the bottom of the incision .
  • a guide tab 15 is arranged on the part 6a, which engages around the edge of the part 6b in the region of the cutout 9.
  • this is the parts 6a and 6b connecting swivel joint formed in a simple manner from the two guide tabs 12 and the guide tab 15 opposite them.
  • FIG. 4 shows a third embodiment of a holding member in two views. If only a lateral displacement is sufficient between the two parts 6a and 6b of the holding member 6, then this embodiment can be chosen.
  • the part 6a again has on the shoulders 13 guide tabs 12 which grip around the part 6b.
  • the course of the shoulders 13 is simplified in that their edge is perpendicular to the longitudinal axis of the holding member 6.
  • the part 6b has shoulders 16, the edge of which is also perpendicular to the longitudinal axis of the holding member.
  • the possible lateral movement of the parts 6a and 6b against one another is limited by the respective abutment of a guide tab 12 on the narrow free end of part 6a or a guide tab 17 on a prong 10 at the free end of part 6b.
  • the holding members 6 can also be designed in accordance with the embodiment shown in FIG.
  • part 6b of the holding members also serves as corner reinforcement 18 for shadow mask 2.
  • tubular rivet 11 is arranged as a swivel joint. To stiffen the part 6a, it can be provided with folded-over edges 19.
  • the holding members 6 are connected to the edge 7 of the shadow mask 2 at the locations provided for this purpose, directly to the shadow mask or via an intermediate piece to the shadow mask.
  • the shadow mask 2 is inserted into the shield trough 1 and the holding members 6 are simultaneously pushed onto the pins 5. Due to the mobility of the two parts of the holding members, the tolerances are compensated for by a possible movement transverse to the axis of symmetry of the color picture tube. The distance between the shadow mask and the luminescent layer remains unchanged.
  • the holding members are then fixed in their assumed position in that the parts of the holding members are connected to one another, for example by spot welding using a laser beam.
  • the new, simple holding members 6 can be mounted outside the color picture tube and attached to the shadow mask. As a result, the distance between the shadow mask and the luminescent layer is then fixed after insertion into the screen trough, so that no distance gauges are required. Any tolerances in the direction transverse to the axis of symmetry of the color picture tube are then compensated for as already described.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
EP85112262A 1984-09-29 1985-09-27 Farbbildröhre Expired EP0180040B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3435891 1984-09-29
DE19843435891 DE3435891A1 (de) 1984-09-29 1984-09-29 Farbbildroehre

Publications (3)

Publication Number Publication Date
EP0180040A2 EP0180040A2 (de) 1986-05-07
EP0180040A3 EP0180040A3 (en) 1986-07-30
EP0180040B1 true EP0180040B1 (de) 1988-09-07

Family

ID=6246753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112262A Expired EP0180040B1 (de) 1984-09-29 1985-09-27 Farbbildröhre

Country Status (5)

Country Link
US (1) US4663561A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0180040B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS6185756A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1222278A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3435891A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8702993A (nl) * 1987-12-11 1989-07-03 Philips Nv Kleurenbeeldbuis.
NL8800883A (nl) * 1988-04-07 1988-06-01 Philips Nv Kleurenbeeldbuis en werkwijze voor het vervaardigen van zulk een kleurenbeeldbuis.
NL8801944A (nl) * 1988-08-04 1990-03-01 Philips Nv Werkwijze voor het vervaardigen van een kleurenbeeldbuis.
TW341378U (en) * 1993-09-21 1998-09-21 Thomson Consumer Electronics Color picture tube having improved shadow mask-frame assembly support means
US6265818B1 (en) 1994-09-02 2001-07-24 Philips Electronics North America Corporation Stiffened support springs and CRT incorporating same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55154038A (en) * 1979-05-18 1980-12-01 Hitachi Ltd Shadow mask retaining frame body
NL8004173A (nl) * 1980-07-21 1982-02-16 Philips Nv Kleurenbeeldbuis.
NL8102182A (nl) * 1981-05-04 1982-12-01 Philips Nv Kleurenbeeldbuis.
US4439709A (en) * 1982-04-29 1984-03-27 Rca Corporation Color picture tube having improved temperature compensating support for a mask-frame assembly
US4467242A (en) * 1982-10-18 1984-08-21 Rca Corporation Color selection electrode mounting structure having an off-set washer

Also Published As

Publication number Publication date
US4663561A (en) 1987-05-05
DE3564888D1 (en) 1988-10-13
JPH0219578B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-05-02
DE3435891A1 (de) 1986-04-10
EP0180040A2 (de) 1986-05-07
EP0180040A3 (en) 1986-07-30
CA1222278A (en) 1987-05-26
JPS6185756A (ja) 1986-05-01

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