Global Patent Index - EP 0495068 A4

EP 0495068 A4 19921119 - THIN CONFIGURATION FLAT FORM VACUUM-SEALED ENVELOPE

Title (en)

THIN CONFIGURATION FLAT FORM VACUUM-SEALED ENVELOPE

Publication

EP 0495068 A4 19921119 (EN)

Application

EP 91914809 A 19910719

Priority

US 56225190 A 19900803

Abstract (en)

[origin: WO9202947A1] A thin configuration flat form glass envelope for use in vaccum tubes, incandescent lamps, fluorescent lamps and other electronic devices having elements which operate in a partial vacuum. In certain embodiments the envelope is comprised of a flat wall plate (14) and shaped wall plate (12) having a plurality of spaced-apart ridges (16, 18, 20) which project toward and in juxtaposition with the flat plate (14). The side walls of the ridges converge at a predetermined included angle and merge at a sharp apex that contacts the flat plate along a narrow path which produces minimal degradation of brightness uniformity across the envelope when light is transmitted through the shaped plate. Between the ridges a plurality of channels (28, 30) are formed containing an ionizable medium which is energized by electrodes to produce UV light which in turn is absorbed by a phosphor coating to emit visible light. In other embodiments the envelope is formed by two shaped plates joined together in facing relationship to form the channels.

IPC 1-7

H01J 61/30; H01K 1/28

IPC 8 full level

H01J 5/02 (2006.01); H01J 9/24 (2006.01); H01J 61/30 (2006.01); H01K 1/28 (2006.01)

CPC (source: EP KR)

H01J 5/02 (2013.01 - EP); H01J 61/30 (2013.01 - KR); H01K 1/28 (2013.01 - EP)

Citation (search report)

  • [A] EP 0222928 A1 19870527 - GTE SYLVANIA INC [DE]
  • [A] GB 2217905 A 19891101 - AC DC HOLDINGS LIMITED [GB]
  • [AD] US 4767965 A 19880830 - YAMANO MASARU [JP], et al
  • [X] PATENT ABSTRACTS OF JAPAN vol. 13, no. 450 (E-830)(3798) 11 October 1989 & JP-A-1 175 160 ( NIPPON SHEET GLASS CO LTD ET AL. ) 11 July 1989
  • [A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 166 (E-746)(3514) 20 April 1989 & JP-A-64 000 639 ( STANLEY ELECTRIC CO LTD ) 5 January 1989
  • See references of WO 9202947A1

Designated contracting state (EPC)

AT DE FR GB IT SE

DOCDB simple family (publication)

WO 9202947 A1 19920220; CA 2067377 A1 19920204; EP 0495068 A1 19920722; EP 0495068 A4 19921119; JP H05503607 A 19930610; KR 920702541 A 19920904

DOCDB simple family (application)

US 9104997 W 19910719; CA 2067377 A 19910719; EP 91914809 A 19910719; JP 51363391 A 19910719; KR 920700749 A 19920403