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    World’s-first WVGA 10-µm Pitch GaN Microdisplays for Augmented Reality Video by Leti

    Extending its expertise in high-brightness microdisplay technology for augmented reality and other applications, Leti will demonstrate the world’s first wide video graphic array (WVGAGaN microdisplay with 10-micron pixel pitch during Display Week in Los Angeles, May 21-26.

    The 10-micron 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 (10 µm) ever presented. Patterning high density microLED arrays and hybridizing them on a CMOS circuit, using Leti’s micro-tube technology, enabled Leti to achieve this performance.

    Leti_First active-matrix WVGA GaN microdisplay with 10 μm pixel pitch

    The demonstrator at Display Week in booth 1315 features a monochrome (blue or green) active matrix prototype with WVGA resolution of 873 x 500 pixels.

    “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 will present 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 at 5 p.m., May 23, will demonstrate the feasibility of LED arrays with pixel pitch as small as 3 µm, which is a world record.

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

    ELE Times Bureau
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