White color light emitting device
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Abstract
An ultraviolet type white color light emitting device (Q) including a 340 nm-400 nm ultraviolet InGaN-LED, a first fluorescence plate of ZnS doped with more than 1×1017cm−3 Al, In, Ga, Cl, Br or I for absorbing ultraviolet rays and producing blue light (fluorescence), a second fluorescence plate of ZnSSe or ZnSe doped with more than 1×1017cm−3 Al, In, Ga, Cl, Br or I for absorbing the blue light, producing yellow light (fluorescence) and synthesizing white color light by mixing the yellow light with the blue light.
A blue light type white color light emitting device (R) including a 410 nm-470 nm blue light InGaN-LED, a fluorescence plate of ZnSxSe1-x (untreated 0.2≦x≦0.6; heat-treated 0.3≦x≦0.67) doped with more than 1×1017cm−3 Al, In, Ga, Cl, Br or I for absorbing the blue light, producing 568 nm-580 nm yellow light (fluorescence) and synthesizing white color light by mixing the yellow light with the blue LED light.
31 Citations
17 Claims
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1-7. -7. (canceled)
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8. A white color light emitting device comprising:
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a light emitting diode (LED) emitting blue light; and
fluorescent material of ZnSxSe1-x doped with more than 1×
1017 cm−
3 Al, In, Ga, Cl, Br or I for converting the blue light into yellow light and synthesizing white color light by mixing the blue light with the yellow light. - View Dependent Claims (16)
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9. A white color light emitting device comprising:
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a light emitting diode (LED) emitting blue light between 410 nm and 470 nm; and
fluorescent material of ZnSxSe1-x doped with more than 1×
1017 cm−
3 Al, In, Ga, Cl, Br or I for converting the blue light into yellow light between 568 nm and 580 nm and synthesizing white color light by mixing the 410 nm-470 nm blue light with the 568 nm-580 nm yellow light. - View Dependent Claims (10, 11, 12, 13, 14, 15, 17)
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Specification