White-light emitting device and preparation method and application of the same
AssigneeEverlight Electronics Co., Ltd.
InventorsYi-Jung CHEN, Chih-Chieh YANG, Chin-Chang SHEN, Ru-Shi LIU
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Abstract
A white-light emitting device and its preparation method are provided. The white-light emitting device comprises an ultraviolet (UV) light emitting diode (LED) chip, a first phosphor, and a second phosphor, wherein the UV LED chip generates a first radiation; the first phosphor is composed of Zn(C3N2H4)2 powder and is excited by the first radiation to generate a second radiation; and the second phosphor is excited by the first radiation and/or the second radiation to generate a third radiation. The third radiation is then mixed with the first radiation and/or the second radiation to generate a white light.
Claims20
A white-light emitting device, comprising:
- an ultraviolet (UV) light emitting diode (LED) chip for generating a first radiation;
- a first phosphor being composed of Zn(C3N2H4)2 powders, wherein the first phosphor is excited by the first radiation and transforms a part of the first radiation into a second radiation having a longer wavelength;
- and
- a second phosphor, which is excited by the first radiation and/or the second radiation to generate a third radiation, and the third radiation is mixed with the first radiation and/or the second radiation to generate a white light.
A method for preparing a white-light emitting device, comprising:
- providing an UV LED chip for generating a first radiation;
- providing a first phosphor and a second phosphor;
- and
- mixing the first phosphor and the second phosphor;
- wherein the first phosphor is composed of Zn(C3N2H4)2 powders and is excited by the first radiation to generate a second radiation;
- the second phosphor is excited by the first radiation and/or the second radiation to generate a third radiation;
- and the third radiation is mixed with the first radiation and/or the second radiation to generate a white light.
Dependencies are inferred from the claim text.