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Posts Tagged ‘OSRAM’

App note: Comparison of LED circuits

Sunday, August 4th, 2019

Another application note from OSRAM on different LED circuit design failure mode. Link here (PDF) In recent years, Light Emitting Diodes (LEDs) have become a viable alternative to conventional light sources. The overriding advantages long life, high efficiency, small size and short reaction time have lead to the displacement, in...

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App note: Dimming LEDs with respect to grouping current

Sunday, August 4th, 2019

App note from OSRAM describing the behaviour of LEDs in respect to brightness by varying the current and to suggest solutions for avoiding negative influence for the application. Link here (PDF) In the design of a driving circuit for LEDs, the dimming behaviour is an important topic to fulfill the...

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App note: Light quality – White light parameters

Sunday, May 26th, 2019

App note from OSRAM on consistency of colors specifically white lights. Link here (PDF) White light is not the same as white light. When different light sources are used, color differences may become visible. To understand why this can happen, it is necessary to understand how people perceive color and...

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App note: Ambient lighting design utilizing RGB LEDs

Sunday, May 26th, 2019

App note from OSRAM on using RGB LEDs or their MULTILED® for automotive interior lighting. Link here (PDF) This application note describes the advantages and challenges of utilizing RGB LEDs for ambient lighting control. Besides pointing out practical challenges, preferred solutions for RGB LEDs are outlined and discussed to assist...

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App note: Thermal consideration of flash LEDs

Sunday, February 24th, 2019

Pulsed LED application like flash LEDs requires adequate thermal management to counter the heavy heat caused by larger current, here's an app note from OSRAM discussing on thermal management of LEDs. Link here (PDF) This application note focuses on how to develop an adequate thermal management for LEDs in camera...

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App note: Dimming InGaN LEDs

Sunday, February 24th, 2019

App note from OSRAM on InGaN LEDs dimming method without penalty on its wavelength. Link here (PDF) While the InGaN technology produces the brightest light output across Blue, Deep blue, Verde, True green and White, it is important to understand that the wavelength of the light emitted depends on the...

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App note: Driving LEDs with a PIC Microcontroller

Sunday, January 27th, 2019

An App note from OSRAM on an Intelligent control circuitry example using a PIC Microcontroller. Link here (PDF) Nowadays, applications increasingly make use of LEDs as a replacement for traditional light bulbs. For example, LEDs are frequently used in the design of automobile tail lights, signal lights, traffic signals, and...

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App note: Package-related thermal resistance of LEDs

Sunday, January 27th, 2019

App note from OSRAM on thermal resistance for LEDs and IREDs (IR emitting diodes). Link here (PDF) In order to achieve the expected reliability, lifetime and optimal performance of LEDs, especially for high-power LEDs, appropriate thermal management is of the utmost importance. One of the key parameters for good thermal...

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App note: Ambient light sensor SFH5701

Sunday, December 9th, 2018

App note from OSRAM on their ALS device SFH5701, its operation and application method. Link here (PDF) The SFH5701 is a small, two-wire, linear output current ambient light sensor (ALS) with current amplifier and dark current compensation. The ALS is capable of resolving a wide range of ambient light levels...

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App note: Light guides

Sunday, September 30th, 2018

Light guide basics app note from OSRAM. Link here (PDF) Light Guides are used wherever the light of a light source should be distributed homogeneously over a particular area, when there is a spatial distance between light source and the area which is to be illuminated.

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App note: LED diagnosis in automotive applications

Sunday, September 30th, 2018

App note from OSRAM about different approaches on LED string diagnostic in automotive. Link here (PDF) One requirement especially in automotive applications is the diagnosis of failures in functions and systems. Therefore light functions realized with LEDs like break light, daytime running light, low and high beam may require a...

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App note: Preventing LED failures caused by corrosive material

Sunday, April 15th, 2018

Chemical compatibility of LEDs application note from OSRAM. Link here (PDF) The performance and stability of light emitting diodes (LEDs) may be influenced by various chemical incompatibilities arising from chemicals and materials used, amongst other things, in luminaire construction, or by gases in the proximate environment of LEDs during field...

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App note: LEDs for wearable applications

Sunday, April 15th, 2018

Brief app note from OSRAM, LEDs for heart rate monitoring through skin reflection of emitted light. Link here (PDF) This application note provides a short introduction into the general use of LEDs for wearable applications, with a focus on heart rate monitoring.

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App note: Advanced LED rework procedure for video wall and signage applications

Sunday, February 25th, 2018

App note from OSRAM about LED rework on signages and their demand for more sophosticated tools. Link here (PDF) SMT LEDs have became more and more popular in video wall and signage applications, replacing radial LEDs. This leads to more difficulties during the repair or replacement of failed LEDs on...

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App note: Infrared (IR) Spectroscopy with the SFH 473X – Background & technology

Sunday, July 9th, 2017

Infrared spectroscopy by OSRAM and their SFH 473X broadband light emitters. Link here (PDF) Imagine you can check if the mangos on the market are sweet - without even touching them… Imagine you can verify if your prescribed medical tablets contain the life-saving compound – or if they are counterfeits…...

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App note: Ambient light sensors – General application note

Sunday, July 9th, 2017

Different ambient sensors differs on their ability to sense specific wavelength and introduce different ambient levels compared to human eye, here's a general application note from OSRAM. Link here (PDF) This application note introduces discusses ambient light sensing. The different types of ambient light sensors are described and related to...

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App note: Driving of OLEDs

Sunday, April 16th, 2017

Application note from OSRAM on driving OLEDs with constant current for longer operation. Link here The operation of OLEDs with electronic drivers is similar to anorganic LEDs for the most part. In a majority of applications, standard LED drivers may be used also for OLEDs. Nevertheless, there are some important...

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App note: SOLERIQ® L38

Sunday, October 30th, 2016

OSRAM's filament looking LED application note. Link here (PDF) SOLERIQ® L38 (GW T3LxF1) is a filament LED with a beam angle of 360deg for indoor retrofit lighting applications. It combines the advantages of modern LED technology with the aesthetics of traditional light bulbs. The construction of the SOLERIQ® L38 consists...

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App note: Iris Recognition SFH 4780S

Sunday, March 20th, 2016

This application note from OSRAM describes the use of the SFH 4780S in iris recognition (iris scanning) as illumination module. Link here (PDF) Personal authentication is becoming a key requirement for various electronic devices. Besides of the pin number, today most systems are based on so called biometric “properties”. Biometrics...

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App note: Eye safety of IREDs used in lamp applications

Sunday, March 20th, 2016

This application note from OSRAM describes the possible hazards of infrared LEDs (IREDs) used for lamp applications with respect to the IEC-62471 standard and how to classify IREDs according to different risk groups. Link here (PDF) As the radiated optical power of light emitting diodes (LEDs) has increased in recent...

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