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Title: Light-emitting device test systems

Abstract

Light-emitting devices, such as LEDs, are tested using a photometric unit. The photometric unit, which may be an integrating sphere, can measure flux, color, or other properties of the devices. The photometric unit may have a single port or both an inlet and outlet. Light loss through the port, inlet, or outlet can be reduced or calibrated for. These testing systems can provide increased reliability, improved throughput, and/or improved measurement accuracy.

Inventors:
; ; ; ;
Publication Date:
Research Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EE) (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1417881
Patent Number(s):
9,874,597
Application Number:
14/696,891
Assignee:
KLA-Tenor Corporation (Milpitas, CA) DOEEE
DOE Contract Number:
EE0005877
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Apr 27
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

McCord, Mark, Brodie, Alan, George, James, Guan, Yu, and Nyffenegger, Ralph. Light-emitting device test systems. United States: N. p., 2018. Web.
McCord, Mark, Brodie, Alan, George, James, Guan, Yu, & Nyffenegger, Ralph. Light-emitting device test systems. United States.
McCord, Mark, Brodie, Alan, George, James, Guan, Yu, and Nyffenegger, Ralph. 2018. "Light-emitting device test systems". United States. doi:. https://www.osti.gov/servlets/purl/1417881.
@article{osti_1417881,
title = {Light-emitting device test systems},
author = {McCord, Mark and Brodie, Alan and George, James and Guan, Yu and Nyffenegger, Ralph},
abstractNote = {Light-emitting devices, such as LEDs, are tested using a photometric unit. The photometric unit, which may be an integrating sphere, can measure flux, color, or other properties of the devices. The photometric unit may have a single port or both an inlet and outlet. Light loss through the port, inlet, or outlet can be reduced or calibrated for. These testing systems can provide increased reliability, improved throughput, and/or improved measurement accuracy.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2018,
month = 1
}

Patent:

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  • The present invention relates to phosphors for energy downconversion of high energy light to generate a broadband light spectrum, which emit light of different emission wavelengths.
  • A semiconductor light-emitting device and method are disclosed. The semiconductor light-emitting device is provided with at least one control layer or control region which includes an annular oxidized portion thereof to channel an injection current into the active region, and to provide a lateral refractive index profile for index guiding the light generated within the device. A periodic composition grading of at least one of the mirror stacks in the device provides a reduced operating voltage of the device. The semiconductor light-emitting device has a high efficiency for light generation, and may be formed either as a resonant-cavity light-emitting diodemore » (RCLED) or as a vertical-cavity surface-emitting laser (VCSEL). 12 figs.« less
  • A semiconductor light-emitting device and method. The semiconductor light-emitting device is provided with at least one control layer or control region which includes an annular oxidized portion thereof to channel an injection current into the active region, and to provide a lateral refractive index profile for index guiding the light generated within the device. A periodic composition grading of at least one of the mirror stacks in the device provides a reduced operating voltage of the device. The semiconductor light-emitting device has a high efficiency for light generation, and may be formed either as a resonant-cavity light-emitting diode (RCLED) ormore » as a vertical-cavity surface-emitting laser (VCSEL).« less
  • The present invention relates to organic light emitting devices (OLEDs). The devices of the present invention are efficient white or multicolored phosphorescent OLEDs which have a high color stability over a wide range of luminances. The devices of the present invention comprise an emissive region having at least two emissive layers, with each emissive layer comprising a different host and emissive dopant, wherein at least one of the emissive dopants emits by phosphorescence.
  • The present invention relates to organic light emitting devices (OLEDs), and more specifically to OLEDS that emit light using a combination of fluorescent emitters and phosphorescent emitters. The emissive region of the devices of the present invention comprise at least one phosphor-sensitized layer which has a combined emission from a phosphorescent emitter and a fluorescent emitter. In preferred embodiments, the invention relates to white-emitting OLEDS (WOLEDs).