LED Multiplexer



What is an LED Multiplexer?

Cymtec NeoLite is a compact LED Multiplexer, which requires minimal alignment for smaller, lower cost light engines.

The LED Multiplexer is designed to collimate, colour mix and homogenise high brightness LEDs in etendue restrictive systems. This means is that it is possible to create a colour changeable light source with a small emission area and uniform spread of light. This technology is tailored for specific applications ensuring optimal performance.

Latest Developments

Cymtec’s new LED multiplexing technology has demonstrated more than 40% more optical light coupling that the current best reported results.  This has been achieved with Cymtec’s new innovative and patent pending approach allowing very little loss from coatings, clipping and polarisation while still maintaining commercially relevant costs.

The CTO, Prof Nigel J Copner, said, “ We are very excited about this breakthrough in coupling, as it is very cost effective and will have an enormous impact on the overall efficiency of projectors, endoscopes etc.  When used in conjunction with Cymtec’s earlier phosphor concepts we expect, for the first time, that an effective commercial replacement for the high power Xenon lighting system will be possible”.

Cymtec are currently engaged with a number of companies and are looking for the first commercial products to be available early next year.  Further information can be provided on request.

LED Multiplexer Phosphor Prototype

Cymtec LED Multiplexer benefits

  • LEDs are excellent low cost, high brightness, non-toxic sources.
  • LED multiplexer
  • 2- 8 LED wavelengths
  • Non-LED sources possible
  • Novel design preserves brightness/etendue
  • Low cost to manufacture
  • Mechanically stable
  • High reliability

Cymtec's patent pending LED multiplexer technology is based on well established techniques and technologies that have millions of deployed units, more than a decade of time in the field, and low failure rates.

Because the Neolite is manufactured in the same way as dielectric light pipes that have been used in projection display applications for many years, the assembly techniques have a proven history.

In fact, a portion of the NeoLite design is a hollow lightpipe identical to those discussed above.

Likewise, the hard, sputter coated filter and mirror elements in the design have accumulated billions of field hours in some of the most harsh applications on Earth including terrestrial and undersea telecom field deployment and instrumentation applications, and projection display with a FIT rate below 5.

A closer look at the application most closely related to the Neolite architecture in terms of reliability is that of color wheels and light pipes which were deployed in rear projection televisions and are still deployed in front projectors.
As mentioned above, the assemblies and optical coatings have survived in these environments without issue for more than a decade. This environment is more severe than that of LED combination because the UHP lamps have UV content and heat loads that can be damaging to adhesives and optics.

LEDs pose a number of design challenges that Cymtec’s LED Multiplexer NeoLite is able to manage: 

  • Wide angular emission = more space required
  • Large etendue
  • Large thermal load
  • Narrow emission spectrum (no white)
  • Difficult alignment during assembly
  • No easy way to combine 4 or more LEDs

NeoLite manages these disadvantages in a simple low cost package.

NeoLite is the only known (patent pending) technology that provides maximum throughput for applications in display.

The Key Technology enablers Cymtec products (namely NeoLite) will include:

Large area LED's
Sub contract availability of optical coating processes

This will open up a wide range of environmental improvement opportunities within the fields of: