Abstract
The multiplane augmented reality (AR) head-up display (HUD) is important in improving
driving safety and comfort. In this paper, we propose an AR-HUD with
switchable display modes based on polymer dispersed liquid crystal
(PDLC) and lens holographic optical elements (HOEs), which can provide
two display modes: the dual-virtual-image mode and the
virtual-real-image mode. The dual-virtual-image mode can produce two
virtual images at different depths, which can provide a better sense
of reality integration for the driver to improve driving safety and
comfort. The virtual-real-image mode can produce one far virtual image
and one near real image at different depths, and it provides a larger
eye box (EB) for both driver and passengers in the car and a higher
image contrast. The two display modes can be switched by an
electronically controlled scattering module consisting of a pair of
PDLC films. The proposed AR-HUD system is compact and equipped with
multiplane display and mode-switching functions, and is expected to be
applied in the future.
Funder
National Natural Science Foundation of China
Major Science and Technology Projects in Anhui Province
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering