High-brightness phosphor screen and method for manufacturing the same
AssigneeSamsung SDI Co., Ltd.
InventorJae-eun Jang
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Abstract
A high-brightness phosphor screen and a method for forming the same are provided. The high-brightness phosphor screen having a low or middle working voltage, unlike a method of improving luminescent properties by use of a new synthetic phosphor, can be formed by simple deposition of a phosphor mixture that contains a proper ratio of a blue or green light-emitting phosphor for color image display and a bluish green light-emitting ZnO:Zn phosphor with high luminescent efficiency at low voltages.
Claims6
A high-brightness phosphor screen, comprising:
- a luminescent material for emitting light of a predetermined color, used for color image display;
- the luminescent material comprises at least one blue light-emitting phosphor selected from the group consisting of (Zn,Cd)S:Ag, (Zn,Cd)S:Ag,Cl, (Zn,Cd)S:Ag,Cl,Al and (Zn,Cd)S:Ag,Cl,Mg, or a green light-emitting phosphor, (Zn,Cd)S:Cu,Al,Au;
- and
- a ZnO:Zn phosphor capable of enhancing the brightness of the display,
- wherein the mixing ratio of the luminescent material to the ZnO:Zn phosphor is varied according to a desired level of the brightness.
A method for forming a high-brightness phosphor screen by mixing a luminescent material for emitting light of a predetermined color and a predetermined amount of a ZnO:Zn phosphor, the method comprising the steps of:
- (a) preparing a phosphor mixture solution by dispersing the luminescent material and the ZnO:Zn phosphor in a solvent, wherein the luminescent material comprises at least one blue light-emitting phosphor selected from the group consisting of (Zn,Cd)S:Ag, (Zn,Cd)S:Ag,Cl, (Zn,Cd)S:Ag,Cl,Al and (Zn,Cd)S:Ag,Cl,Mg, or a green light-emitting phosphor, (Zn,Cd)S:Cu,Al,Au;
- (b) forming a phosphor layer by depositing the phosphor mixture solution on a substrate;
- and
- (c) evaporating the solvent from the deposited phosphor layer.
Dependencies are inferred from the claim text.