(19)
(11) EP 0 644 571 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.08.1995 Bulletin 1995/35

(43) Date of publication A2:
22.03.1995 Bulletin 1995/12

(21) Application number: 94114353.9

(22) Date of filing: 13.09.1994
(51) International Patent Classification (IPC)6: H01J 29/07
(84) Designated Contracting States:
DE GB

(30) Priority: 21.09.1993 US 124183

(71) Applicant: THOMSON CONSUMER ELECTRONICS, INC.
Indianapolis, IN 46206 (US)

(72) Inventors:
  • Keller, Raymond Edward
    Clarks Summit, PA 18411 (US)
  • Sies, Neil Edward
    Lititz, PA 17543 (US)
  • Piascinski, Joseph John
    Leola, PA 17540 (US)

(74) Representative: Wördemann, Hermes, Dipl.-Ing. 
Thomson Consumer Electronics Sales GmbH Postfach 91 13 45
D-30433 Hannover
D-30433 Hannover (DE)


(56) References cited: : 
   
       


    (54) Color picture tube having shadow mask-frame assembly support means


    (57) An improved color picture tube (8) includes an evacuated glass envelope (10) having a faceplate panel (12) with a cathodoluminescent screen (22) comprising different color-emitting phosphor elements disposed thereon. The panel includes a shadow mask-frame assembly (30) mounted therein by support means (34) located at peripherally spaced positions within the panel. The shadow mask (24) includes an apertured portion (25), the apertures of which are in register with the phosphor elements of the screen. The support means at each spaced position includes a stud (44) attached to the glass envelope, a spring (46) having an aperture (60) therein for engaging the stud, and a plate (48) welded between the spring and the mask-frame assembly. The improvement comprises mechanically joining the spring and the plate by extrusions interlocking the parts together at two-spaced apart locations (50, 51) along one edge (52) of the parts, whereby the spring and the plate are in contact along at least a portion of the facing surfaces thereof. The interlocking extrusions render the spring and plate resistant to shock induced movement, thereby minimizing misregister between apertures in the mask and the phosphor elements of the screen.






    Search report