Multi-plane augmented reality display based on cholesteric liquid crystal reflective films

Self Cite

Multiplane displays are capable of displaying 3D scenes with correct focus cues by creating multilayer 2D images in the display volume. Hence, such a 3D display technique could effectively address the accommodation‐vergence conflict (AVC) problem, which is prevalent in augmented reality (AR) displays. In this paper, we review the recent progress on multiplane AR displays based on liquid crystals (LCs) for AR applications. The working principle of multiplane AR displays is illustrated, the electro‐optical properties of the tunable LC devices are investigated and display prototypes are demonstrated. Finally, we discuss the prospects and challenges of multiplane AR displays based on LCs.

Section: Multiplane Ar Displays Based On Clc Reflective Filmsmentioning

confidence: 99%

“…Transmittance spectra of the left‐handed cholesteric liquid crystal (LHCLC) and right‐handed cholesteric liquid crystal (RHCLC)…”

Section: Multiplane Ar Displays Based On Clc Reflective Filmsmentioning

confidence: 99%

“…A, when the camera was focused at 20 cm, the “moon” was clearly observed. B, when the camera was focused at 130 cm, the “rectangle” was clearly observed…”

Section: Multiplane Ar Displays Based On Clc Reflective Filmsmentioning

confidence: 99%

Section: Multiplane Ar Displays Based On Clc Reflective Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multiplane displays based on liquid crystals for AR applications

Liu

2020

Self Cite

High‐efficiency folded optics for near‐eye displays

Luo

Ding

Rao³

et al. 2023

Pancake lens structure offers a promising solution to compact formfactor for near-eye displays. However, utilizing a half mirror to triple the optical path length causes a dramatic optical loss. The theoretical maximum optical efficiency is only 25%. To balance the tradeoff between compact formfactor and optical efficiency, here we propose a new folded optical structure with a doubled efficiency and doubled optical path length, using two polarizationselective cholesteric liquid crystal reflectors. Simulation results agree with the experiment reasonably well. Two display configurations are established to evaluate the imaging performances of the proposed pancake lens structure.

Vergence‐accommodation conflict increases time to focus in augmented reality

Spiegel,

Erkelens

2024

Vergence‐accommodation conflicts (VAC) occur in near‐eye displays when the binocular disparity of the 3D rendered content (vergence) does not match the display focal distance (accommodation). VAC has been shown to reduce perceptual image quality, cognitive performance, and oculomotor coordination. In this study, we aimed to investigate the impact of VAC on visual performance in augmented reality (AR). Specifically, we quantified the impact of AR VAC on the ‘Time to Focus’ (TTF); when the user switches focus between real‐world content and world‐locked AR‐rendered content. Our results show that TTF increases exponentially with VAC. The increase is more pronounced at closer vergence distances in displays with a focal distance of 1 D or longer. Finally, we showed that VAC may have a differential effect across age groups; specifically, older users may be affected more in closer focal and longer vergence distances.