led_brands: Spectral data for LEDs from different suppliers
In photobiologyLEDs: Spectral Data for Light-Emitting-Diodes

led_brands

R Documentation

Spectral data for LEDs from different suppliers

Description

The collection of spectra leds.mspct contains spectra for light emitting diodes (LEDs) from several different suppliers. The character vectors described here contain the names of the spectra for LEDs from each supplier/brand to facilitate their extraction from the collection. One additional vector, led_brands contains the names of the brands as used in the names of the spectra in the collection.

Usage

led_brands

Agilent_leds

HueyJann_leds

LedEngin_leds

Ledguhon_leds

LCFOCUS_leds

Marktech_leds

CREE_leds

Epileds_leds

Epistar_leds

SeoulSemicon_leds

Bridgelux_leds

Nichia_leds

Norlux_leds

Osram_leds

QuantumDevices_leds

Roithner_leds

Weili_leds

TaoYuan_leds

Luminus_leds

Samsung_leds

Format

A vector of character strings.

An object of class character of length 7.

An object of class character of length 2.

An object of class character of length 15.

An object of class character of length 2.

An object of class character of length 4.

An object of class character of length 1.

An object of class character of length 8.

An object of class character of length 1.

An object of class character of length 3.

An object of class character of length 2.

An object of class character of length 9.

An object of class character of length 4.

An object of class character of length 3.

An object of class character of length 4.

An object of class character of length 15.

An object of class character of length 5.

An object of class character of length 1.

Details

As described for the individual brands, ownership of brands and companies has changed over the years through take-overs, mergers and sales of company divisions. Even when brand names have changed it has been the norm for electronic components that component type codes are maintained unchanged. In contrast to some integrated circuits, exact replacement types from multiple suppliers are not available for LEDs.

Agilent/Hewlett Packard

The character vector Agilent_leds contains the names of the spectra to facilitate their extraction from the collection.The division of Hewlett Packard which supplied these LEDs became part of Agilent when this division spin-off the mother company. More recently the electronic components division of Agilent became Avago Technologies for a while. Currently, BROADCOM supplies some of these LEDs or similar improved types.

Huey Jann

Huey Jann was a Taiwanese supplier of high power LED arrays. It is no longer in business.

LED Engin

Led Engin was an independent supplier of power LEDs in low thermal resistance ceramic substrate packages. It is now part of Osram.

LEDGUHON

These LEDs where bought from AliExpress. They are assembled using Bridgelux chips by Guangzhou Juhong Optoelectronics Co., Ltd., China.

LCFOCUS

These LEDs where bought from LCFOCUS official store at AliExpress. They are assembled LCFOCUS TECH, Shenzhen China.

Marktech

Marktech Optoelectronics is a distributor and supplier of LEDs from the U.S.A. that sells VIS and UV emitting LEDs.

CREE

The former LED products group of Cree is now Cree LED (U.S.A.) and a part of SGH.

Epileds

EPI LEDS Co., Ltd. (Taiwan) is devoted to the R & D, design, manufacture and sales of blue, green, red, and white light LED wafers and chips.

Epistar

EPISTAR Corporation (Taiwan).

Seoul Semiconductors

Seoul Semiconductor (Korea) supplies LEDs, including SunLike white LEDs using 'phosphor' technology from Toshiba (Japan). Seoul Viosys supplies UV LEDs based on an agreement with SETi (U.S.A.).

Bridgelux

Bridgelux, Inc. (U.S.A.) is a supplier of LEDs partnering with Epistar and Kaistar for the manufacture of their LEDs.

Nichia

With 24 in the world and inventor of the blue (and also white) light emitting diodes. The company was already an important supplier of 'phosphors' before the invention of the white LEDs based on blue-emitting LED chips.

Some of the Nichia LEDs we measured were assembled into arrays of the series names SmartArray and LinearZ from LUMITRONIX (Germany), and/or supplied by LEDRISE Ltd. (Hong Kong, Germany and Romania) .

Norlux

Norlux is now part of Thomas Research Products. The LEDs we measured are some of the earliest COB designs from early 1990's. Each COB containing 90 LED chips. (Norlux is no longer in bussiness.)

Osram

ams-OSRAM International GmbH (Germany) produces LEDS and various light and other sensors. Current trade name for LEDs is Osram Opto Semiconductors. Osram has recently become owner of Led Engin, whose LEDs are listed separately in this pacakge. LEDs supplied under the LED Engin brand differ mostly in the packages' thermal properties and contact layout.

Quantum Devices

Quantum Devices (U.S.A.) sold in the past both individual LEDs and luminaires. They were in the late 1980's and early 1990's the supplier of choice for LEDs emitting in the far-red region of the spectrum. The company still exists but no longer sells LEDs.

Roithner LaserTechnik

Roithner LaserTechnik is a distributor and reseller of LEDs, LED arrays and lasers. They have a very extensive catalogue covering almost all wavelengths for which LEDs are manufactured. Many of the LEDs are sold under new codes as they are retested and in some cases individual characterization data provided. For example some of short UV LEDs sold are from SETi.

Shenzhen Weili

Leds Global and Shenzhen Weili are trade names of the same supplier of LEDs and LED arrays. They sell both standard types and also assemble customized arrays upon request. Customized arrays may have up to twelve independent channels and vary in power output from 10 W to 300 W.