Abstract: A yellow light emission phosphor usable in a fluorescent display device does not include cadmium and Eu concentration in the yellow light emission phosphor is reduced to a range of about 0.001 mol % to about 0.1 mol %. The phosphor on a fluorescent display driven at a low voltage generates a yellow light emission with an excellent chromaticity and has a good life span characteristic.

Abstract: A mixture phosphor is provided by mixing a phosphor of a red luminous color devoid of Cd with a phosphor of a green family luminous color also devoid of Cd, wherein a luminous color of the mixture phosphor is a warm color ranging from yellow to orange. And, in the mixture phosphor, S component is removed or less than that of the conventional phosphor of the warm luminous color. Accordingly, a dark streak may not appear or a dark streak appearing time may be delayed, thereby providing a fluorescent display device having an improved display quality.

Abstract: In a fluorescent display device wherein light is emitted by impinging a low speed electron beam on a phosphor layer formed on an anode, the phosphor layer comprises a compound containing W and/or a compound containing P, K and/or Na. The compound containing P, K and/or Na may be a compound selected from the group consisting of K3PO4, P2O5 and Na2SiO3, the compound being added in an amount of 0.01 to 10.00 wt % to the phosphor layer, to provide a higher luminance residual ratio and a higher high temperature exposure characteristic than those of a convention fluorescent display device.

Abstract: A phosphor without using cadmium having excellent luminous characteristic which emits a light in the visible region. The phosphor is prepared by mixing 1% of B2O3 powder and 10% of In2O3 with CaS:Eu, Ce phosphor to prepare a mixture to which is added vehicle containing an organic binder to form paste. The vacuum fluorescent display using the phosphor exhibits lifetime performance and initial luminance superior to the fluorescent display in which a phosphor without using cadmium is applied.

Abstract: A phosphor material of the chemical composition formula (Sr1−x−y, Mgx, Cay)TiO3:Pr,Al, where the value of x+y is in the range 0.001 to 0.05. Another phosphor material has the chemical composition formula SrTiO3:Pr,Al, in which the surfaces of phosphor particles are diffused with a diffusing agent containing at least one of Be, Mg, Ca, Sr, and Ba. Still another phosphor material has the chemical composition formula SrTiO3:Pr,Al, where Sr/Ti molar ratio is 0.88 to 0.99.

Abstract: A phosphor without using cadmium having excellent luminous characteristic which emits a light in the visible region. The phosphor is prepared by mixing 1% of B2O3 powder and 10% of In2O3 with CaS:Eu, Ce phosphor to prepare a mixture to which is added vehicle containing an organic binder to form paste. The vacuum fluorescent display using the phosphor exhibits lifetime performance and initial luminance superior to the fluorescent display in which a phosphor without using B2O3 is applied.

Abstract: The Phosphor material has the chemical composition formula (Sr1−x−y, Mgx, Cay)TiO3:Pr,Al; where the value of x+y is in the range 0.001 to 0.05.

Abstract: A yellow light emission phosphor usable in a fluorescent display device does not include cadmium and Eu concentration in the yellow light emission phosphor is reduced to a range of about 0.001 mol % to about 0.1 mol %. The phosphor on a fluorescent display driven at a low voltage generates a yellow light emission with an excellent chromaticity and has a good life span characteristic.