Method of manufacturing a luminescent screen for a CRT
OwnerGeorge Milton Ehemann JR., Brian Thomas Collinsinventors
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Abstract
A method of manufacturing a luminescent screen assembly for a color cathode-ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an inner surface of a face plate panel of the CRT. The luminescent screen assembly includes an organic conductive (OC) layer overcoated with an organic photoconductive (OPC) layer. Three different color-emitting phosphors are sequentially deposited over portions of the OPC layer by uniformly charging to having a surface charge of one polarity and than selectively discharging desired areas thereof of the OPC layer. Appropriate color-emitting phosphors having the opposite polarity charge as that of the OPC layer are then deposited on the charged areas.
Claims6
A method of manufacturing a luminescent screen assembly on a face plate panel of a color cathode-ray tube, comprising:
- applying an organic conductive layer on the face plate panel;
- applying an organic photoconductive layer on the organic conductive layer;
- charging the organic photoconductive layer to a desired voltage, thereby giving the organic photoconductive layer a surface charge of one polarity;
- sequentially discharging selected portions of the charged organic photoconductive layer;
- and
- affixing a color-emitting phosphor having a charge of the opposite polarity as that of the organic photoconductive layer onto the charged portions of the organic photoconductive layer after each discharging step.
A method of manufacturing a luminescent screen assembly on a face plate panel of a color cathode-ray tube (CRT), comprising:
- applying an organic conductive layer on the face plate panel;
- applying an organic photoconductive layer on the organic conductive layer;
- charging the organic photoconductive layer to a desired voltage, thereby giving the organic photoconductive layer a surface charge of one polarity;
- sequentially discharging selected portions of the charged organic photoconductive layer;
- and
- affixing a color-emitting phosphor onto the organic photoconductive layer after each discharging step, wherein
- for at least one charging, discharging, and affixing sequence, the organic photoconductive layer has a surface charge of one polarity and the corresponding color-emitting phosphor has a charge of the opposite polarity;
- and
- for at least one other charging, discharging, and affixing sequence, the organic photoconductive layer has a surface charge of one polarity and the corresponding color-emitting phosphor has a charge of the same polarity.
Dependencies are inferred from the claim text.