Huajian Jin, Zijian Lin, Wenzong Lai, Haonan Jiang, Junhu Cai, Hao Chen, Weijie Hao, Yun Ye, Sheng Xu, Qun Yan, Tailiang Guo, Enguo Chen
First published: 13 February 2025
https://doi.org/10.1002/lpor.202402083
Abstract
Retinal projection display enables the direct projection of virtual images onto the retina through the pupil center via a projection engine, showing promise in addressing the vergence-accommodation conflict in augmented reality near-eye displays. However, existing RPD architectures universally employ passive luminous micro-electromechanical systems or spatial light modulators, encountering challenges associated with beam aperture limitations and structural inflexibility. In response to these, this paper presents a novel micro-LED retinal projection display architecture that integrates the active luminous full-color micro-LEDs with a pixel-to-pixel imaging fiber bundle, effectively subverting conventional RPD designs. Additionally, the flexible fiber bundle brings an adaptable design that enables optoelectronic separation capabilities. The design principles and feasibility are thoroughly described and validated through simulations and experiments. A full-color µRPD prototype is developed, demonstrating sharp imaging across an extensive focal depth range. Remarkably, the µRPD architecture exhibits a groundbreaking advancement in enabling underwater AR displays without necessitating special waterproof treatments, underscoring its potential versatility and adaptability to challenging environments. This design paves a new way for practical applications of NEDs in complex and demanding conditions, thereby contributing to the evolution of NED systems.
Paper Information
The team of Enguo Chen from Fuzhou University has proposed a novel micro-LED retinal projection display (RPD) architecture that combines actively emitting full-color micro-LEDs with pixel-to-pixel imaging fiber bundles, revolutionizing the traditional RPD design. Additionally, the flexible fiber bundle introduces a versatile design that enables optoelectronic separation capabilities. The design principles and feasibility of this architecture are thoroughly described and validated through both simulations and experiments. The authors have developed a full-color µRPD prototype, showcasing sharp imaging across a wide depth of focus range. Notably, the µRPD architecture has demonstrated a breakthrough in enabling underwater augmented reality (AR) displays without the need for special waterproof treatments, highlighting its potential versatility and adaptability to challenging environments. This design opens new avenues for the practical application of Near-Eye Displays (NEDs) in complex and demanding conditions, facilitating the evolution of NED systems.
The research findings were published on February 13, 2025, under the title “Micro-LED Retinal Projection for Augmented Reality Near-Eye Displays” in Laser & Photonics Reviews.
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