LETI exhibits GaN-based video micro display
The prototype microdisplay, based on a self-emissive GaN-based technology, features a monochrome (blue or green) active-matrix prototype with WVGA resolution of 873 x 500 pixels, believed to be the highest resolution with the smallest pixel pitch ever presented.
According to LETI, the 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.
The display is made using a technique developed by LETI called micro-tube hybridisation, in which high-density microLED arrays are bonded to a CMOS circuit
"With this result, Leti's technology has reached an important milestone," said François Templier, project manager. "We will continue to work towards a 5-micron pixel pitch and, beyond that, on a new technology that will take GaN LED microdisplays to less than a 5-micron pixel pitch."
Leti is presenting the 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 at 5 pm, May 23, will demonstrate the feasibility of LED arrays with pixel pitch as small as 3micron, which is a world record.
These results presented by Leti were obtained under a collaborative work program with III-V Lab.