| 摘要 |
The screen of a black-surround color picture tube is provided with a discontinuous coating of light-absorbing material, discontinuous in that the light-absorbing material is applied to surround those elemental areas of the screen which are to receive deposits of phosphor. The screen is then heated so that the exposed elemental screen areas and the light-absorbing coating attain a uniform temperature. A slurry, including a chosen one of the three phosphor materials, is then dispensed onto the screen and distributed to establish a layer of slurry of a desired thickness over the entire screen surface. The excess slurry is removed by tilting the screen to effect dumping. The slurry layer is then set, without the application of heat, and after the layer has been set, heat is applied to dry the layer. Thereafter, screening continues in conventional fashion.
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