Koninklijke Philips Corporation N.v.

Harald Gl&auml;ser

Hans-Helmut Bechtel

Joachim F Opitz

Walter Mayr

Wolfgang Busselt

Hans Nikol

Detlef Uwe Wiechert

Helmut Bechtel

Thomas J&uuml;stel

Claus Feldmann

The invention describes a color picture screen with an enhanced contrast. The color picture screen comprises a color filter layer between the picture screen glass and the phosphor layer, which filter layer comprises a red pigment in the areas of the red phosphors, a blue pigment in the areas of the blue phosphors, and a blue or a red pigment in the areas of the green phosphors.

Color picture screen with color filter

A plasma picture screen is disclosed. In one embodiment, an AC plasma picture screen with a coplanar arrangement which has an enhanced luminance is provided. A layer, which has a high reflection in the wavelength range of the plasma emission (145 to 200 nm) and a high transmission in the visible wavelength range, is provided on the front plate. The front plate includes a glass plate on which a dielectric layer, a protective layer, a reflective layer are provided. The reflective layer reflects UV light emitted in the direction of the front plate back towards phosphors. The optical properties of the UV light reflecting layer are realized with inorganic particles with a particle diameter of between 200 nm and 500 nm and a layer thickness from 0.5 &mgr;m to 5 &mgr;m, or with agglomerates of inorganic particles with a particle diameter of between 10 nm and 200 nm and a layer thickness of 0.2 &mgr;m to 10 &mgr;m.

Plasma picture screen with UV light reflecting front plate coating

A plasma picture screen, in particular an AC plasma picture screen with a coplanar arrangement having an enhanced luminance. A UV light emitting layer ( ) is provided on the front plate ( ), which comprises a glass plate ( ) on which a dielectric layer ( ) and a protective layer ( ) are provided, or on the carrier plate ( ) with the phosphor ( ). The layer ( ) comprises a VUV phosphor which converts the VUV light of the plasma discharge into UV light with a wavelength between 200 and 350 nm and emits this in the direction of the phosphor layer ( ).

Plasma picture screen with UV light emitting layer

Growing community of inventors

Aachen, Germany

Harald Gläser

Growing community of inventors

Aachen, Germany

Harald Gl&auml;ser

Harald Gläser