Slim tube funnel design with improved funnel

(19)

(11)

EP 1 162 644 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.11.2003 Bulletin 2003/45

(43)	Date of publication A2:
	12.12.2001 Bulletin 2001/50

(21)	Application number: 01113334.5

(22)	Date of filing: 01.06.2001

(51)	International Patent Classification (IPC)⁷: H01J 29/86, H01J 29/87

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

02.06.2000 US 587102

(71)	Applicant: Thomson Licensing S.A.
	92100 Boulogne-Billancourt (FR)

(72)	Inventors:
	Opresko, Stephen Thomas, c/o THOMSON multimedia 92648 Boulogne cedex (FR) Swank, Harry Robert, c/o THOMSON multimedia 92648 Boulogne cedex (FR) Hutzler, Richard Wayne, c/o THOMSON multimedia 92648 Boulogne cedex (FR) Fulmer, Doreen May, c/o THOMSON multimedia 92648 Boulogne cedex (FR)

(74)	Representative: Kohrs, Martin et al
	Thomson multimedia 46, quai A. Le Gallo 92648 Boulogne-Billancourt Cedex 92648 Boulogne-Billancourt Cedex (FR)

(54)	Slim tube funnel design with improved funnel

(57) A 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. Alternatively, 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.

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