Optical design of automotive augmented reality 3D head-up display with light-field rendering

Jin-Ho Lee; Igor Yanusik; Yoonsun Choi; Byongmin Kang; Chansol Hwang; Elena Malinovskaya; Juyong Park; Dongkyung Nam; Chanhee Lee; Chansu Kim; Taehong Min; Sunghoon Hong

doi:10.1117/12.2576660

5 March 2021 Optical design of automotive augmented reality 3D head-up display with light-field rendering

Jin-Ho Lee, Igor Yanusik, Yoonsun Choi, Byongmin Kang, Chansol Hwang, Elena Malinovskaya, Juyong Park, Dongkyung Nam, Chanhee Lee, Chansu Kim, Taehong Min, Sunghoon Hong

Author Affiliations +

Proceedings Volume 11708, Advances in Display Technologies XI; 117080I (2021) https://doi.org/10.1117/12.2576660
Event: SPIE OPTO, 2021, Online Only

Abstract

Although head-up displays (HUDs) have already been installed in some commercial vehicles, their application to augmented reality (AR) is limited owing to the resulting narrow field of view (FoV) and fixed virtual-image distance. The matching of depth between AR information and real objects across wide FoVs is a key feature of AR HUDs to provide a safe driving experience. Meanwhile, current approaches based on the integration of two-plane virtual images and computer-generated holography suffer from problems such as partial depth control and high computational complexity, respectively, which makes them unsuitable for application in fast-moving vehicles. To bridge this gap, here, we propose a light-field-based 3D display technology with eye-tracking. We begin by matching the HUD optics with the light-field display view formation. First, we design mirrors to deliver high-quality virtual images with an FoV of 10 × 5° for a total eyebox size of 140 × 120 mm and compensate for the curved windshield shape. Next, we define the procedure to translate the driver eye position, obtained via eye-tracking, to the plane of the light-field display views. We further implement a lenticular-lens design and the corresponding sub-pixel-allocation-based rendering, for which we construct a simplified model to substitute for the freeform mirror optics. Finally, we present a prototyped device that affords the desired image quality, 3D image depth up to 100 m, and crosstalk level of <1.5%. Our findings indicate that such 3D HUDs can form the mainstream technology for AR HUDs.

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Jin-Ho Lee, Igor Yanusik, Yoonsun Choi, Byongmin Kang, Chansol Hwang, Elena Malinovskaya, Juyong Park, Dongkyung Nam, Chanhee Lee, Chansu Kim, Taehong Min, and Sunghoon Hong "Optical design of automotive augmented reality 3D head-up display with light-field rendering", Proc. SPIE 11708, Advances in Display Technologies XI, 117080I (5 March 2021); https://doi.org/10.1117/12.2576660

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