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Osram Opto Semiconductor GmbH, the no. 2 in the world for optoelectronic semiconductors for lighting, sensor and visualization technology offers a comprehensive knowhow when it comes to chip technology, converter materials and LED housing. With this combination of technology and expertise Osram OS has wide range of LEDs that are perfect qualified for the VMS (Variable Message Signs) market.

Many different applications are covered, from high-resolution displays right down to lowresolution, monochrome creative images for use in various locations and design settings.

The right Solution from Osram OS for You

From miniature packages right through to high-power LEDs, but always in the form of an SMT component. You will find its Topleds® absolutely ideal. These are already being used in many different application areas and can be supplied with or without a lens, as well as with a white or black surface (for better contrast).

Applications

The company’s oval throughhole LEDs, which are available in 3 mm and 5 mm sizes, are especially suited to display applications; thanks to their angle of reflection (from 15° to 100° resp. oval with 50°/100° or 45°/90°), they feature excellent beam characteristics.

Technologies

Color Spectrum
A list of the most commonly used colors:
- Y – Yellow (586–595 nm)
- A – Amber red (612–624 nm), primarily intended for use in Europe
- S – Super red (626–639 nm), primarily used in NAFTA countries

Osram offers LEDs with the latest “thin film” chip technology. These boast an extremely high degree of optical efficiency, combined with an output of approximately 75 %. To put this in context: for a standard chip, the figure is approx. 25 %.

Housing Technology
The new thin-film Topled® LEDs, which are available in Y – Yellow, R – Red, O – Orange, S – Super red and A – Amber red, offer optimum brightness. These extremely bright LEDs are perfect for both indoor and outdoor applications, such as passenger information at bus stops and railway stations, as well as for backlighting and indicator lamps. Last but not least, they are suitable for all the various automotive applications; special quality feature: Osram is “Automotive Certified” as regards its new Thinfilm Topled®.

Thinfilm Technology
It was primarily developed for display customers. Examples: L*T67F (Topled®), L*E6SF (Power Topled®), L*E63F (Power Topled® with lens).

In addition, many types can be supplied with a black surface. This improves color luminosity and gives you the technological edge so that you can stand out from your competitors.

Brightness
The levels of brightness that can be achieved are a decisive factor for traffic signs and information displays. Assuming a typical, relatively narrow 30° angle of reflection, Osram OS SMT LEDs with lens compare extremely favourably with 5 mm through-hole highbrightness LEDs in terms of the brightness levels that can be achieved.

With their impressive beam characteristics, the new thinfilm Topleds® are also the perfect solution for the tough design requirements that all customers within this market segment tend to impose.

Advantages of Using SMT LEDs for VMS Applications

- Optimization of costs in terms of assembly
- Identical footprints simplify the production process. Example: single-color and multi-color products with the same pad layout can be processed using the same settings
- Even beam characteristics with the combination: multi and single-color display
- Better thermal response thanks to good heat conductivity and improved cooling capability
- Generally support higher current feed

Colour and Brightness Binning

Binning is a crucial factor in many applications and is also a much debated topic when it comes to selecting LEDs and LED manufacturers.

Osram Opto Semiconductors and Sasco Holz are able to offer you optimum support in this regard.

Osram OS is able to meet the key requirements during the manufacturing process itself, which involves a detailed sorting process: each LED is individually tested and classified (using the specified testing current).

The LEDs are sorted on the basis of brightness, chromaticity coordinate and forward voltage so that each reel contains just one category of LED. This information is included on the unit pack label (e.g. BIN: LYT67F-U2-4-3B).

Sasco Holz employs intelligent logistics systems. These are used to store the manufacturer’s BIN information as soon as goods are received. If necessary, this information can subsequently be recalled for a specific outbound consignment.

Our Lighting Competence Center is staffed by a team of experts who will be happy to help with any queries you may have about LEDs. Our application engineers are able to offer solutions from any field, from driver solutions, thermal solutions, optics and color management, right through to all forms of control.