25 April 2023
Hon Hai collaborates with Ennostar and Unikorn to develop 6500PPI micro-LED micro-display with blue light brightness of 200,000 nits
In collaboration with fellow Taiwan-based firms Ennostar and Unikorn Semiconductor Corp, at Touch Taiwan 2023 in Taipei (19–21 April), Hon Hai Precision Industry Co Ltd (Foxconn) announced the development of a new 0.12-inch micro-display with a pixel density exceeding 6500PPI and a blue light brightness of 200,000 nits, using micro-LED technology.
The purpose of the collaboration is to improve micro-LED efficiency by optimizing the structure of micro-LED chips and adopting a new thin-film protection technology, reducing surface defects, improving external quantum efficiency, and increasing product reliability.
Considering the high-brightness requirements of augmented reality (AR) applications, Unikorn — which has experience in III-V semiconductor manufacturing and advanced process technology — was responsible for optimizing the micro-LED chip efficiency in this joint development to ensure a balance between brightness and chip power consumption during subsequent full-color conversion. Hon Hai, on the other hand, used its own developed color conversion technology to further achieve full-color display effect at 3600PPI.
For general high-PPI full-color displays, the small pixel pitch cannot provide enough quantum dot optical density, causing leakage of blue light in high-brightness scenes, resulting in blue halo and color shift among pixels, notes Hon Hai. The firm says that its micro-LED manufacturing technology, based on a semiconductor process, uses high-efficiency quantum dot color conversion and a self-developed reflective inter-pixel light shield technology to provide sufficient optical density of quantum dots and prevent color shift among pixels, producing high-purity red and green light for full-color display effect.
Hon Hai collaborated with Ennostar and Unikorn Semiconductor for blue micro-LED process development and foundry services, and to enhance the development of a high-efficiency blue light pixel process with a pixel pitch of 4μm. The long-term goal is to invest resources in applications with the growth potential to achieve differentiation and technological innovation.
The new product can be widely used in smart glasses and AR/VR devices, and Hon Hai targets collaboration and technological innovation to expand business opportunities in the fields of virtual reality, augmented reality, and other metaverse applications.