Samsung Led Co., Ltd.

Samsung Electronics Co., Ltd.

Yun Seup Chung

Joon Ho Yoon

Chang Hoon Kwak

Chulsoo Yoon

Chul Soo Yoon

Il Woo Park

Jong Rak Sohn

The invention provides a high quality composite phosphor powder which ensures diversity in emission spectrum, color reproduction index, color temperature and color, a light emitting device using the same and a method for manufacturing the composite phosphor powder. The composite phosphor powder comprises composite particles. Each of the composite particles includes at least two types of phosphor particles and a light transmitting binder. The phosphor particles have different emission spectrums. In addition, the light transmitting binder is formed between the phosphor particles and binds them together.

Composite phosphor powder, light emitting device using the same and method for manufacturing composite phoshpor powder

The present invention relates to phosphor blend for wavelength conversion and a white light emitting device using the same. The phosphor blend of the invention comprises three phosphors, A(PO)Cl:Eu, DSiO:Eu and MS:Eu at a composition where near ultraviolet radiation is converted into light positioned at a CIE coordinate (x, y), where 0.25&#x2266;x&#x2266;0.45 and 0.25&#x2266;y&#x2266;0.43, wherein A comprises at least one of Sr, Ca, Ba, and Mg, D comprises at least one of Ba, Sr, and Ca, and M comprises at least one of Sr and Ca. Furthermore, the present invention provides a new white light emitting device in combination of the phosphor blend and a near ultraviolet LED.

Phosphor blend for wavelength conversion and white light emitting device using the same

Composite phosphor powder, light emitting device using the same and method for manufacturing composite phosphor powder

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Seoul, South Korea

Yun Seup Chung