mLED’s technology is based on gallium nitride light emitting diodes (GaN LEDs), familiar as commercial blue, green and white LEDs, but configured in novel micro-pixellated formats. These ‘microLED’ arrays provide high-density emissive micro-displays for spectrally-selective photoexcitation in the UV to visible spectral range in light patterns that can be controlled both spatially and temporally. This is complimented by control electronics which have been developed to provide advanced imaging capabilities. This is an emissive matrix technology and as such is not based on external switching or filtering systems (LCoS, and MEMs systems require separate light sources and pattern generation). It can thus deliver high optical power densities in projection or proximity exposure formats, the latter being especially useful for integrated lab-on-chip technology.
microLEDs offer distinctive features including:
- Application-specific light patterns depending upon the pixel layout and addressing.
- Custom-specified wavelengths in the range 370 – 600nm for selective photoexcitation.
- W/cm2 imaged pixel power densities
- Ability to project continuous pulsed or modulated light patterns, all in a compact and robust package.