Technology


The MicroLED Concept

InfiniLED is backed by over 10 years of research in MicroLED technology and more than 30 years of research in photonics and light sources. 

The MicroLED technology brings together the benefits of a semiconductor lasers and LEDs. Similar to a laser, It produces high intensity and collimated light directly from the chip. Like an LED, it is available in a range of wavelength, has not threshold current requirements and does not require temperature feedback control. 

The core of the MicroLED technology is the etching of a parabolic reflector into the light source material at the point of light generation. This reflector collimates the light and directs it through a single surface of the device.  

The benefits of the MicroLEDs include:
  • Ultra-high light intensity - up to 300 W/cm2

  • Collimated light directly from the chip. 
  • The active area can be optimised for the application - from 10 um to very large. 
  • High light extraction efficiencies. 
  • Minimal stray light - enabling true microarrays. 
  • Both contacts are on the back side (flip chip packaging inherently)
  • The MicroLED concept can be applied to all LED materials (blue, green, red, NIR, UV)
  • The structure has a smooth output face, which can be further functionalised (dichroic mirrors, filters, etc.) 

Large MicroLED™ Dies

Larger illumination areas can be obtained by densely packing and filling a die with the parabolic structures, effectively giving a MicroLED  cluster or LED with all the pixels working in concert.

Conventional vs µLED Die

  • Whole LED dies are filled with clusters of MicroLED pixels
  • Only the section of the die which contains the parabolic structures emits light, i.e. the illumination region of the die can be controlled
  • A die can contain a single pixel or clusters sized to match a specific application, i.e. long narrow cluster for coupling to light guides or small circular cluster for coupling to fibres
  • Alternatively, the pixels can be individually addressable, i.e. MicroLED array