Shadow mask with porous insulating layer and heavy metal layer
AssigneeSamsung Display Devices Co., Ltd.
InventorsGunter Heine, Bernhard Schonert, Peter Neumann, Ulrich Schulke
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Abstract
A shadow mask for color picture tubes has a cathode-side surface covered with a heat-insulating layer, an electron reflecting and absorbing layer, and a heat-emitting cover layer. Some of the electrons are reflected while others are absorbed in the cover layer and transformed to heat, but the heat does not act directly on the mask and is emitted into the interior of the tube. Local temperature differences which particularly occur with high contrast pictures and cause partial doming of the perforated mask are reduced.
Claims8
A shadow mask for a color picture tube comprising a perforated mask containing iron and having on a cathode-side surface at least one porous heat-insulating layer including thermally stable porous particles and a binder, and at least one heavy metal-containing cover layer containing a binder, with the heat-insulating layer located between the perforated mask and the cover layer.
Dependencies are inferred from the claim text.