Shadow mask having an insulating layer and a process for the production of the same
AssigneeSamsung Display Devices Co., Ltd.
InventorsGunter Heine, Bernhard Schonert, Peter Neumann, Ulrich Schulke, Albrecht Uhlig
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Abstract
A shadow mask for a color picture tube a thermal includes insulating layer preventing heat transfer to an apertured shadow mask. The side of the mask directed toward the cathode of the color picture tube is coated with a heat-insulating layer including particles having a porous structure. The pores may contain heavy metals or heavy metal compounds so that electron reflection and absorption occurs directly within the layer. The resulting heat is transferred to the interior of the picture tube instead of to the mask.
Claims27
A shadow mask for use in a frame and to be arranged in front of a screen of a color picture tube, said shadow mask comprising:
- an apertured mask comprising predominantly iron metal and having a cathode-side surface;
- and
- an insulating layer comprising bound porous inorganic particles containing heavy metals, heavy metal compounds, or combinations thereof, said insulating layer adjacent to the cathode-side surface of the apertured mask.
A shadow mask for use in a frame and to be arranged in front of a screen of a picture tube, said shadow mask comprising:
- an apertured mask comprising predominantly iron metal and having a cathode-side surface;
- and
- an insulating layer comprising a coating comprising bound porous inorganic particles, said insulating layer adjacent to the cathode-side surface of the apertured mask.
A process for producing a shadow mask having an apertured mask predominantly comprising iron and having a cathode-side surface, and an insulating layer comprising bound porous inorganic particles containing at least one of heavy metals and heavy metal compounds, the insulating layer being adjacent to the cathode-side surface of the apertured mask, the process comprising:
- contacting inorganic porous particles with a molecular dispersed formulation containing at least one of a heavy metal and a heavy metal compound;
- fixing the molecular dispersed formulation to the inorganic porous particles;
- and
- mixing the inorganic porous particles and a binder.
Dependencies are inferred from the claim text.