Novel microLED concept for realization of the next generation of AR based micro-display applications

Purpose and goal:

In the project, pyramidal microLEDs will be developed into prototypes for microdisplay and microprojector applications. Backplane with Si-based drive electronics will be integrated with microLED frontplane with a unique hybridization technology developed by Polar Light Technologies where the integration will be performed with a flip-chip-based bonding technology.

Through production of prototypes the TRL level can be raised from 3 (proof of concept ) to 5 (technology validated in relevant environment). This will bring interest from the market and help the commercialization. Expected results and effects:

Production of smaller, brighter and more energy-efficient microLEDs compared to the microLEDs on the market today. PLTs´s new bottom-up technology will allow pyramidal micro-LEDs to realize next-generation AR-based micro-display applications without the damage that results from etching in a top-down approach. This advantage regarding optical performance becomes even more pronounced, as the LED dimensions decrease to the micron or submicrometer-range as the area/volume ratio increases.

Approach and implementation:

The project is carried out by PLT in collaboration with Chalmers technical university college. Design, fabrication and optical characterization of new microLEDs is done by PLT as well as subsequent hybridization with the Si backplane. Chalmers contributes expertise in electrical characterization of microLEDs both before and after integration with CMOS electronics from the backplane.

In addition, Chalmers will perform simulations to optimize the system´s performance. During the entire project, activities for the construction of an entire supply chain will be ongoing.