公开(公告)号：US20150221815A1

公开(公告)日：2015-08-06

申请号：US14170176

申请日：2014-01-31

Applicant: Cree, Inc.

Inventor： David Clatterbuck ,  Harry Seibel ,  Romit Dhar ,  Robert David Schmidt ,  Daniel Carleton Driscoll ,  Michael John Bergmann

IPC: H01L33/00 ,  H01L33/12 ,  H01L27/15 ,  H01L33/32 ,  H01L33/50

CPC classification number: H01L33/0004 ,  H01L33/32 ,  H01L33/50 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/48465 ,  H01L2924/00014 ,  H01L2924/00

Abstract: A solid state light emitting device includes a solid state light emitter and a lumiphoric material that are selected for use with one another to provide light emissions with improved (i.e., reduced) thermal droop A solid state emitter having a short peak emission wavelength (e.g., in a visible range at or below 440 nm) seemingly less than optimal at room temperature for use with a particular lumiphor can trigger more efficient stimulation of lumiphor emissions at high temperatures. Enhanced epitaxial structures also inhibit decrease of radiant flux by LEDs at elevated temperatures.

Abstract translation: 固态发光器件包括固态光发射器和被选择用于彼此使用的发光材料，以提供具有短峰值发射波长的改进（即，减少）的热下降固体发射体的光发射（例如， 在等于或低于440nm的可见光范围内）似乎不太适合在室温下与特定的荧光探针一起使用，可以在高温下触发更有效地刺激发光体的辐射。 增强的外延结构还抑制LED在升高的温度下的辐射通量的降低。

公开(公告)号：US09219201B1

公开(公告)日：2015-12-22

申请号：US14529327

申请日：2014-10-31

Applicant: Cree, Inc.

Inventor： Iliya Todorov ,  Harry Seibel

IPC: H01L33/50 ,  C09K11/80 ,  H01L33/20 ,  H01L33/54 ,  C09K11/77

CPC classification number: H01L33/502 ,  C09K11/7706 ,  H01L33/20 ,  H01L33/505 ,  H01L33/507 ,  H01L33/54 ,  H01L2224/48091 ,  H01L2924/00014

Abstract: Light emitting devices include a blue LED that emits blue light having a peak wavelength between 430 nanometers and 480 nanometers and a recipient luminophoric medium that includes luminescent materials that down-convert a portion of the blue light emitted by the blue LED to light having a peak wavelength that is between about 500 nanometers and about 545 nanometers. The combination of the blue light emitted by the blue LED and the light emitted by the luminescent materials in the recipient luminophoric medium comprises light that is perceived as blue light having a color point that falls within the region on the 1931 CIE Chromaticity Diagram defined by ccx, ccy chromaticity coordinates of (0.1355, 0.0399), (0.175, 0.0985), (0.1743 0.1581), (0.1096, 0.0868), (0.1355, 0.0399).

Abstract translation: 发光装置包括发射峰值波长在430纳米和480纳米之间的蓝色光的蓝色LED，以及包含将由蓝色LED发射的蓝色光的一部分下变频到具有峰值的光的发光材料的受体发光体介质 波长在约500纳米至约545纳米之间。 由蓝色LED发出的蓝色光和受体发光体中的发光材料发出的光的组合包括被感知为蓝色光的光，其色点落在由ccx定义的1931 CIE色度图上的区域内 （0.1355,0.0399），（0.175,0.0985），（0.1743±0.1581），（0.1096,0.0868），（0.1355,0.0399）的ccy色度坐标。