U.S. Philips Corporation

Koninklijke Philips Corporation N.v.

Jan W Kleine

Jan P Van Den Brink

Hermanus N Tuin

Henricus J Ligthart

Harm Tolner

Petrus R M Schoone

Maarten A Zwikker

Peter M Bruisten

Gerardus M Oosterhout

Paul F A Sterken

Picture display device with an evacuated tube comprising, around a longitudinal axis, a display window, a conical portion and a neck portion, said conical portion being connected to an upstanding wall of the display window. The conical portion has a reduced wall thickness. The conical portion is preferably provided with a coating having a layer thickness of preferably less than 50 &mgr;m. The coating preferably comprises a layer of polyurethane.

Picture display device with a conical portion having a particular wall thickness

Picture display device with an evacuated tube comprising, around a longitudinal axis, a display window, a conical portion and a neck portion, said conical portion being connected to an upstanding wall of the display window. The wall thickness of the conical portion is selectively reduced. In particular, the wall thickness in an area of the conical portion is substantially constant.

CRT with specific envelope thickness

A display device includes: a rear wall (4); a display panel (3) spaced from the rear wall (4) and a display screen (7) having a pattern of phosphor pixels; an addressing structure (100) disposed intermediate the rear wall (4) and the display panel (3) for addressing the display screen (7); and an aperture spacer plate (101); wherein, the spacer plate (101) includes a glass material having an electrical resistance of log R at 250.degree. C..gtoreq.8. The spacer plate (101) including a glass material having an electrical resistance of log R at 250.degree. C..gtoreq.8 reduces the charging of the spacer plate walls and improves uniformity of phosphor brightness. The spacer plate may further comprise a glass having a lower alkali mobility less than sodium lime glass.

Thin-panel display having resistive spacer plate

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Eindhoven, Netherlands

Jan W Kleine