Frontiers in Optics of Liquid Crystals and Displays

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Liquid Crystals".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 4628

Special Issue Editors


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Guest Editor
Apple Inc., 1 Apple Park Way, Cupertino, CA 95014-0642, USA
Interests: liquid crystal display; display optics; AR/VR; micro-LED display

E-Mail Website
Guest Editor
Amazon Lab126, 1100 Enterprise Way, Sunnyvale, CA 94089, USA
Interests: liquid crystal soft material; display devices; spatial light modulator; AR/VR; smart lighting

Special Issue Information

Dear Colleagues,

After decades of extensive material research and development, as well as device innovations, liquid crystal (LC) has extended its applications to cover displays, spatial light modulators, adaptive lenses for sensors, etc. LC exhibits a certain degree of orientational order compared to an isotropic liquid while it is less rigid than a crystalline solid and can flow easily, which enables its unique properties including large physical anisotropies and high susceptibility to external stimuli. LC has widespread applications in flat panel displays, including TVs, projectors, monitors, smartphones, etc. In addition to traditional displays, lately, LC-based diffractive optics have also attracted increasing interest to address the major challenges in augmented reality (AR) and virtual reality (VR) displays due to its advantages of high efficiency, polarization selectivity, switching ability and ultrathin form factor. In the meantime, the phase-only modulation property and photo-patternable characteristic of liquid crystal enable novel photonic applications such as spatial light modulators, gratings, and lenses, which can be used to dynamically manipulate the wavefront of a light source with fast-switching and precise wavefront control.

This Special Issue is aimed at the fundamental and applied research on the optics of liquid cyrstal as well as their state-of-the-art applications and relevant display technologies. Topics for this Special Issue will include, but are not limited to, the following:

  • Novel LC display technologies including AR, VR, automotive displays, transparent displays, etc.;
  • Planar liquid crystal optical elements;
  • LC-based spatial light modulators and optical elements;
  • LC technologies in sensing applications;
  • Multi-stable operations in LCs and their applications such as smart windows and reflective displays, etc.

Dr. Fangwang Gou
Dr. Haiwei Chen
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • liquid crystal
  • liquid crystal lens
  • virtual reality/augmented reality
  • diffractive optics
  • flat optics
  • polarization holography
  • spatial light modulator
  • near-eye display

Published Papers (2 papers)

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Research

12 pages, 6411 KiB  
Article
Zero-Optical-Distance Mini-LED Backlight with Cone-Shaped Light Coupling Microstructures
by Zibin Lin, Haonan Jiang, Daochun Ye, Wenyan Zhang, Enguo Chen, Yun Ye, Sheng Xu, Qun Yan and Tailiang Guo
Crystals 2023, 13(2), 241; https://doi.org/10.3390/cryst13020241 - 31 Jan 2023
Cited by 3 | Viewed by 1578
Abstract
This paper presents a zero-optical-distance mini-LED backlight with cone-shaped light coupling microstructures to achieve an ultra-thin backlight architecture (~0.1 mm thickness) by combining the characteristics of direct-lit and edge-lit backlights. There is no gap between the light guide plate (LGP) and the reflector, [...] Read more.
This paper presents a zero-optical-distance mini-LED backlight with cone-shaped light coupling microstructures to achieve an ultra-thin backlight architecture (~0.1 mm thickness) by combining the characteristics of direct-lit and edge-lit backlights. There is no gap between the light guide plate (LGP) and the reflector, as well as between the LGP and the mini-LED embedded in the reflector. The illuminance uniformity and light extraction efficiency (LEE) of the whole structure reach 91.47% and 77.09%, respectively. Nine sub-modules are spliced together to realize 2D local dimming with 0.29% crosstalk. The structure shows high optical performance while reducing the thickness of the backlight module, which is of great significance for the development of mini-LED backlights. Full article
(This article belongs to the Special Issue Frontiers in Optics of Liquid Crystals and Displays)
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8 pages, 1814 KiB  
Article
High-Precision Beam Angle Expander Based on Polymeric Liquid Crystal Polarization Lenses for LiDAR Applications
by Yannanqi Li, Zhenyi Luo and Shin-Tson Wu
Crystals 2022, 12(3), 349; https://doi.org/10.3390/cryst12030349 - 4 Mar 2022
Cited by 13 | Viewed by 2616
Abstract
A novel beam steering angle expander is demonstrated by cascading two polymeric liquid crystal polarization lenses with different diopters. The lens module performs as a planar telescope, which has features such as a light weight, low cost, and high precision. The magnifier offers [...] Read more.
A novel beam steering angle expander is demonstrated by cascading two polymeric liquid crystal polarization lenses with different diopters. The lens module performs as a planar telescope, which has features such as a light weight, low cost, and high precision. The magnifier offers wide-angle, continuous steering when integrated with an active fine-angle beam steering device. The potential application for LiDAR is emphasized. Full article
(This article belongs to the Special Issue Frontiers in Optics of Liquid Crystals and Displays)
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