Multifunctional dual-view head-up display with both privacy protection and information sharing based on holographic optical elements

Zhenlv Lv; Juan Liu

doi:10.1117/12.2663014

12 April 2023 Multifunctional dual-view head-up display with both privacy protection and information sharing based on holographic optical elements

Zhenlv Lv, Juan Liu

Author Affiliations +

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 1256530 (2023) https://doi.org/10.1117/12.2663014
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

Considering the different needs of the driver and passengers for image information when a vehicle equipped with a headup display (HUD) is driving, we propose a multi-functional dual-view compact HUD with both privacy protection and information sharing. The dual viewing angle display is achieved by stacking two layers of holographic optical elements (HOEs) with different diffraction angles due to the excellent angular selectivity of HOEs. Red-green multiplexing HOE₁ and red-blue multiplexing HOE₂ correspond to viewing angle 1 and viewing angle 2, respectively. The different diffraction angles of the green and blue images ensure the privacy of the driver and passengers, allowing for customizable displays. Moreover, the two diffraction angles of the red image ensure the sharing of warning information between the driver and the passenger, and improve the driving safety. Furthermore, the proposed HUD requires only one picture generation unit (PGU) and one holographic combiner and thus has a compact structure. The experimental results verify the feasibility of this method. The size of the fabricated HOEs was 20 cm×15 cm. The field of view (FOV) and eye-box (EB) of the two viewing zones are 10°×5° and 8°×4°, 147mm×81mm and 105mm×87mm, respectively.

Citation Download Citation

Zhenlv Lv and Juan Liu "Multifunctional dual-view head-up display with both privacy protection and information sharing based on holographic optical elements", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 1256530 (12 April 2023); https://doi.org/10.1117/12.2663014

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