Passenger Information Case Study

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Passenger information boards are always much more helpful if they can be seen. Working with our client we developed a low cost dot matrix display that revolutionised the market dominated by SMD LED technology.

  • Manufacturing – tight control of die production and binning
  • Custom reflector design to change dot shape
  • Prototyping and testing to determine luminous intensity, luminous distribution, colour, CRI and XY coordinates

Objective

Manufacture a dot matrix display with dot visual characteristics comparable to a PLCC SMD LED.

Considerations

  • Wide viewing angle
  • High dot intensity
  • High contrast ratio
  • Minimum colour and intensity spread
  • Low cost

Solution

A custom dot matrix display with centralised dot chip, positioned closely to front face of the reflector. Custom reflector shape around the dot and water clear epoxy fill. The solution utilises high performance AlGaInp LED die with a black printed face and tightly controlled binning selection.

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