WVGA microdisplay for AR video on show at Display Week

24th May 2017

CEA / Leti

Alice Matthews

0 0

During Display Week in Los Angeles, 21st to 26th May, Leti will demonstrate what it claims to be the world’s first wide video graphic array (WVGA) GaN microdisplay with 10µ pixel pitch. The 10µ pixel pitch technology will help address the growing demand for augmented reality glasses for consumer and professional users, head-up displays for vehicle drivers and for pico projectors and other compact projectors. This prototype microdisplay, based on a self-emissive GaN-based technology, shows the highest resolution with smallest pixel pitch (10µm) ever presented.

Patterning high-density microLED arrays and hybridising them on a CMOS circuit, using Leti’s micro-tube technology, enabled Leti to achieve this performance.

The demonstrator at Display Week in booth 1315 features a monochrome (blue or green) active-matrix prototype with WVGA resolution of 873x500px.

“With this result, Leti’s technology has reached an important milestone,” said François Templier, Project Manager. “We will continue to work towards a 5µ pixel pitch and, beyond that, on a new technology that will take GaN LED microdisplays to less than a 5µ pixel pitch.”

Leti presented that new technology at Display Week in an invited talk, 'A Novel Process for Fabricating High-Resolution and Very Small Pixel-pitch GaN LED Microdisplays'. The presentation on 23rd May demonstrated the feasibility of LED arrays with pixel pitch as small as 3µm, which the company claims is a world record.

These results presented by Leti were obtained under a collaborative work programme with III-V Lab.