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AssigneeKasei Optonix, Ltd.
InventorsNoboru Kotera, Thihiro Yoshida, Toshiaki Hatsumi, Kazuhito Iwasaki, Isao Iwamoto, Katuzo Kanda, Seiji Murakami, Shusaku Eguchi
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Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered thereto red colored pigment particles such as cadmium sulfoselenide pigment particles, rouge pigment particles or red lead pigment particles, in respective amounts of 0.1 to 2.0 wt %, 0.05 to 2.0 wt % or 0.1 to 12 wt %, based upon the europium activated yttrium oxysulfide phosphor; and a cathode ray tube for high contrast color television using as a red emitting phosphor at least one of the three pigment coated phosphors.
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof cadmium sulfoselenide pigment particles, the amount of said adhered cadmium sulfoselenide pigment particles being in a range of 0.1 wt % to 2.0 wt % based upon said europium activated yttrium oxysulfide phosphor.
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof rouge pigment particles, the amount of said adhered rouge pigment particles being in a range of 0.05 wt % to 2.0 wt % based upon said europium activated yttrium oxysulfide phosphor.
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof red lead pigment particles, the amount of said adhered red lead pigment particles being in a range of 0.1 wt % to 12 wt % based upon said europium activated yttrium oxysulfide phosphor.
A cathode ray tube for high contrast color television using as a red emitting phosphor at least one selected from (1) a pigment coated phosphor comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof cadmium sulfoselenide pigment particles, the amount of said cadmium sulfoselenide pigment particles adhered thereto being in a range of 0.1 wt % to 2.0 wt % based on said europium activated yttrium oxysulfide phosphor, (2) a pigment coated phosphor comprising the same europium activated yttrium oxysulfide phosphor having adhered to the surface thereof rouge pigment particles, the amount of said rouge pigment particles adhered thereto being in a range of 0.05 wt % to 2.0 wt % based on said europium activated yttrium oxysulfide phosphor, and (3) a pigment coated phosphor comprising the same europium activated yttrium oxysulfide phosphor having adhered to the surface thereof red lead pigment particles, the amount of said red lead pigment particles adhered thereto being in a range of 0.1 wt % to 12 wt % based on said europium activated yttrium oxysulfide phosphor.
Dependencies are inferred from the claim text.