US Patent 10032757 Projection display system

A light-emitting diode (LED) projector includes an LED display panel and a projection lens arranged in front of LED display panel and configured to collect and project light emitted by the LED display panel. The LED display panel includes an LED panel and a micro lens array arranged over the LED panel. The LED panel includes a substrate, a driver circuit array on the substrate and including a plurality of pixel driver circuits arranged in an array, and an LED array including a plurality of LED dies each being coupled to one of the pixel driver circuits. The micro lens array includes a plurality of micro lenses each corresponding to and being arranged over at least one of the LED dies.