OPTICAL SEMICONDUCTOR LIGHT EMITTING DEVICE, LIGHTING APPARATUS, AND DISPLAY DEVICE

• US 20150221836A1
• Filed: 08/26/2013
• Published: 08/06/2015
• Est. Priority Date: 08/28/2012
• Status: Abandoned Application

• Current Assignee: Sumitomo Osaka Cement Company Limited
• Original Assignee: Sumitomo Osaka Cement Company Limited
• Inventors: Sato, Yoichi, Kurino, Yasuyuki, Otsuka, Takeshi, Yamaguchi, Takeru, Harada, Kenji
• Application Number:
  US14/424,957
• Publication Number:
  US 20150221836A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/501 characterised by the materials, e.g. binder
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

An optical semiconductor light emitting device which emits white light, includes: an optical semiconductor light emitting element; and an optical conversion layer containing phosphor particles, in which a specific light scattering composition is contained in the optical conversion layer or a light scattering layer containing a specific light scattering composition is provided on the optical conversion layer. An illumination apparatus and a display apparatus including the same are also provided.

Claims

1. An optical semiconductor light emitting device which emits white light, comprising:

an optical semiconductor light emitting element; and

an optical conversion layer containing phosphor particles,

wherein the optical conversion layer further includes a light scattering composition containing light scattering particles and a binder, and

the light scattering particles are particles having an average primary particle size of 3 nm or greater and 20 nm or smaller, which are surface-modified by a surface modifying material having one or more of functional groups selected from an alkenyl group, an H—

Si group, and an alkoxy group, and are made of a material which does not absorb light in an optical semiconductor emission wavelength region.

3. The optical semiconductor light emitting device according to claim 1,

wherein the light scattering composition has a transmittance of 40% or higher and 95% or lower at a wavelength of 460 nm and a transmittance of 80% or higher at a wavelength of 550 nm, the transmittance being measured by an integrating sphere.

4. An illumination apparatus comprising:

the optical semiconductor light emitting device according to claim 1.

5. A display apparatus comprising:

the optical semiconductor light emitting device according to claim 1.

2. An optical semiconductor light emitting device which emits white light, comprising:

an optical semiconductor light emitting element; and

an optical conversion layer containing phosphor particles,

wherein a light scattering layer which includes a light scattering composition containing light scattering particles and a binder is provided on the optical conversion layer, and

the light scattering particles are particles having an average primary particle size of 3 nm or greater and 20 nm or smaller, which are surface-modified by a surface modifying material having one or more of functional groups selected from an alkenyl group, an H—

Si group, and an alkoxy group, and are made of a material which does not absorb light in an optical semiconductor emission wavelength region.

6. The optical semiconductor light emitting device according to claim 2,

wherein the light scattering composition has a transmittance of 40% or higher and 95% or lower at a wavelength of 460 nm and a transmittance of 80% or higher at a wavelength of 550 nm, the transmittance being measured by an integrating sphere.

7. An illumination apparatus comprising:

the optical semiconductor light emitting device according to claim 2.

8. A display apparatus comprising:

the optical semiconductor light emitting device according to claim 2.