ENHANCED COLOUR CONVERSION AND COLLIMATION OF MICRO-LED DEVICES

A pixel comprising a first sub-pixel. The first sub-pixel comprises an LED layer comprising a light-emitting material configured to emit pump light having a pump wavelength. A container layer has a container surface comprising a first container aperture that defines a first container volume extending through the container layer. A first colour converting layer provided in the first container volume is configured to receive pump light from the LED layer and emit first converted light of a first converted wavelength. A first lens is provided on the container layer over the first container aperture, having an outer side that comprises a first convex surface. A first reflector conforming to the first convex surface comprises a first reflector configured to reflect light at the pump wavelength and transmit light at the first converted wavelength; and a second reflector configured to reflect light at both the pump wavelength and the first converted wavelength.