公开(公告)号：WO2019126000A1

公开(公告)日：2019-06-27

申请号：PCT/US2018/065937

申请日：2018-12-17

Applicant: LUMILEDS LLC

Inventor： BOHMER, Marcel Rene ,  HEUTS, Jacobus Johannes Franciscus Gerardus ,  ESTRADA, Daniel ,  SHIMIZU, Kentaro

IPC: H01L33/58 ,  H01L33/56

Abstract: Described herein is a system and method for tuning light scatter in an optically functional porous layer of an LED. The layer comprises a non-light absorbing material structure having a plurality of sub-micron pores and a polymer matrix. The non-light absorbing material forms a plurality of micron-sized porous particles dispersed throughout the layer or a mesh slab, wherein a plurality of sub-micron pores is located within each micron-sized porous particle or forms an interconnected network of sub-micron pores within the mesh slab, respectively. A polymer matrix, such as a high refractive index silicone fills the plurality of sub-micron pores creating an interface between the materials. Refractive index differences between the materials allow for light scatter to occur at the interface of the materials. Light scatter can be decreased as a function of temperature, creating a system for tuning light scatter in an off state and on state of an LED.

公开(公告)号：WO2018026789A1

公开(公告)日：2018-02-08

申请号：PCT/US2017/044852

申请日：2017-08-01

Applicant: LUMILEDS LLC

Inventor： SHIMIZU, Kentaro ,  ROITMAN, Daniel ,  BOHMER, Marcel ,  PATEL, Amil ,  ESTRADA, Daniel

IPC: B05D5/06 ,  H01J1/62

Abstract: Embodiments of the invention include a luminescent material. Particles of the luminescent material include a core of a first semiconductor material, a first shell of a second semiconductor material surrounding the core, a second shell of an insulating material disposed on a surface of the first shell, and a coating disposed on a surface of the second shell. The core shows quantum confinement and has a size in the nanometer range in at least one dimension.

Abstract translation: 本发明的实施例包括发光材料。 发光材料的颗粒包括第一半导体材料的芯，围绕芯的第二半导体材料的第一壳，布置在第一壳的表面上的绝缘材料的第二壳和布置在第一壳的表面上的涂层 第二个外壳。 核心显示量子限制，并且在至少一个维度上具有纳米范围的尺寸。

公开(公告)号：WO2020033327A1

公开(公告)日：2020-02-13

申请号：PCT/US2019/045148

申请日：2019-08-05

Applicant: LUMILEDS LLC

Inventor： HELBING, Rene ,  ESTRADA, Daniel ,  SHIMIZU, Kentaro

IPC: H01L33/50 ,  C09K11/02

Abstract: Devices and techniques are disclosed herein which include a die (321) including side surfaces such that light emitted from the die (321) can exit through the side surfaces. The die includes a first surface and a second surface opposite the first surface such that the distance between the first surface and the second surface is at least 100 micro meters. The die also includes a wavelength converting material (340) deposited external to the die (321) such that the wavelength converting material (340) covers the side surfaces. The wavelength converting material (340) includes phosphor particles, a transparent resin carrier, and transparent particles (350) configured to increase the volume of the wavelength converting material, the transparent particles (350) having a refractive index (Rl) that is similar to the Rl of the transparent resin carrier.

公开(公告)号：WO2020028350A1

公开(公告)日：2020-02-06

申请号：PCT/US2019/044116

申请日：2019-07-30

Applicant: LUMILEDS LLC

Inventor： ESTRADA, Daniel ,  BOHMER, Marcel Rene ,  HEUTS, Jacobus Johannes Francisus Gerardus ,  SHIMIZU, Kentaro ,  CAMRAS, Michael David

IPC: H01L33/56 ,  H01L33/50

Abstract: Light emitting devices include a light emitting semiconductor diode structure and a phosphor material. The phosphor includes pores, at least one of which contains a fill material. An absolute value of a ratio of a coefficient of thermal expansion of the fill material to a coefficient of thermal expansion of the phosphor material is at least two in an embodiment, at least ten in another embodiment, at least 100 in another embodiment, and at least 1,000 in yet another embodiment.

公开(公告)号：WO2019126701A1

公开(公告)日：2019-06-27

申请号：PCT/US2018/067193

申请日：2018-12-21

Applicant: LUMILEDS LLC

Inventor： SHIMIZU, Kentaro ,  BOHMER, Marcel Rene ,  ESTRADA, Daniel ,  HEUTS, Jacobus Johannes Franciscus Gerardus

IPC: H01L25/075 ,  H01L51/52 ,  H01L33/58

Abstract: A first pixel with a first pixel sidewall is disclosed. A second pixel with a second pixel sidewall facing the first pixel sidewall is also disclosed. A first dynamic optical isolation material between the first pixel sidewall and the second pixel sidewall and configured to change an optical state based on a state trigger such that a light behavior at the first pixel sidewall for a light emitted by one of the first pixel and the second pixel is determined by the optical state, is also disclosed.

公开(公告)号：WO2020028337A1

公开(公告)日：2020-02-06

申请号：PCT/US2019/044096

申请日：2019-07-30

Applicant: LUMILEDS LLC

Inventor： ESTRADA, Daniel ,  BOHMER, Marcel Rene ,  HEUTS, Jacobus Johannes Francisus Gerardus ,  SHIMIZU, Kentaro ,  CAMRAS, Michael David

IPC: H01L33/50 ,  H05B33/14 ,  C09K11/70

Abstract: A system and methods for light-emitting diode (LED) devices with a dimming feature that can tailor a color point shift in the light color temperature of a scattering/transparent layer to enlarge a dim to warm range are disclosed herein. A light-emitting device may include a wavelength converting structure configured to receive light from a light emitting semiconductor structure and an adjacent light scattering structure. The light scattering structure may comprise a plurality of scattering particles with a lower refractive index (RI) than the RI of the matrix material in which the scattering particles are disposed. The wavelength converting structure may include a red phosphor and a green phosphor such that to adjust overlap between green emission and absorption by the red phosphor to correspondingly adjust scattering and magnitude of color shift. In an embodiment, the light scattering structure may be integrated in the wavelength converting structure.

公开(公告)号：WO2018067658A1

公开(公告)日：2018-04-12

申请号：PCT/US2017/055073

申请日：2017-10-04

Applicant: LUMILEDS LLC

Inventor： ESTRADA, Daniel ,  SHIMIZU, Ken ,  ROITMAN, Daniel ,  BOHMER, Marcel Rene ,  KANG, Edward

IPC: H01L33/56

Abstract: Light emitting devices (LEDs) are described herein. An LED includes a light emitting semiconductor structure, a wavelength converting material and an off state white material. The light emitting semiconductor structure includes a light-emitting active layer disposed between an n-layer and a p-layer. The wavelength converting material has a first surface adjacent the light emitting semiconductor structure and a second surface opposite the first surface. The off state white material is in direct contact with the second surface of the wavelength converting material and includes multiple core-shell particles disposed in an optically functional material. Each of the core-shell particles includes a core material encased in a polymer or inorganic shell. The core material includes a phase change material.

Abstract translation: 这里描述了发光器件（LED）。 LED包括发光半导体结构，波长转换材料和关闭状态白色材料。 发光半导体结构包括设置在n层和p层之间的发光有源层。 波长转换材料具有与发光半导体结构相邻的第一表面和与第一表面相对的第二表面。 断态白色材料与波长转换材料的第二表面直接接触并且包括设置在光学功能材料中的多个核 - 壳粒子。 每个核 - 壳颗粒包括包裹在聚合物或无机壳中的核心材​​料。 核心材料包括相变材料。