Liquid Crystal Photonics and Emerging Displays

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

Deadline for manuscript submissions: 1 June 2025 | Viewed by 776

Special Issue Editors


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1. National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China
2. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350100, China
3. State Key Laboratory on Advanced Displays and Optoelectronics Technologies, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
Interests: micro and nano display; optical design; AR/VR; micro-LED; quantum dot
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Nanophotonics Research Center, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518055, China
Interests: liquid crystal; metasurface; photoalignment
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
State Key Laboratory on Advanced Displays and Optoelectronics Technologies, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
Interests: photo-alignment technology; advanced liquid crystal displays; fast respond display; green display; smart window

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Guest Editor
State Key Laboratory of Advanced Displays and Optoelectronics Technologies, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
Interests: liquid crystal displays; photoalignment
Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, College of Physical Science and Technology, Yili Normal University, Yining 835000, China
Interests: micro-LED; perovskite; phosphor; photoelectric
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the discovery of the first twisted nematic liquid crystal cell in 1971, this kind of soft matter has drawn wide attention of researchers due to the coexistence of the different properties, exhibiting both the hydrodynamic characteristics of fluids and the anisotropic features of crystals and the related easy control of molecular orientation. These characteristics of liquid crystal photonics enable applications in displays, optical communication, optical switching, storage, sensing, and so on. Recent advancements in this domain focus on integrating liquid crystals with photonic crystals, metamaterials, and topological photonics, paving the way for innovative electro-optical devices and expanding the possibilities for future technologies.

The future development direction of liquid crystals includes material design and synthesis, performance optimization and regulation, and application expansion and innovation. In terms of material design and synthesis, researchers will continue to explore new liquid crystal polymer materials and develop new synthesis methods and modification strategies. In terms of performance optimization and regulation, researchers are committed to improving the thermal stability, mechanical properties and optical properties of liquid crystal polymers. In terms of application expansion and innovation, researchers will continue to explore the application of liquid crystal polymers in new fields, such as emerging displays, biomedicine, energy storage, and flexible electronics.

Liquid crystal displays (LCDs) represent the most successful application of liquid crystal photonics, dominating the current display market with widespread use in televisions, computer monitors, and mobile phone screens. LCD technology has also played a pivotal role in the evolution of emerging display technologies, including organic light-emitting diodes (OLEDs), quantum-dot displays, mini-LEDs/micro-LEDs, micro-displays, projection displays, and near-eye displays. This ongoing innovation underscores the significant impact of liquid crystal technology on the future of display solutions. This Special Issue aims to provide a platform for the research on liquid crystal photonics and emerging displays. Besides original research articles, we also encourage the submission of review papers on recent progress and future prospects or challenges.

Prof. Dr. Enguo Chen
Dr. Wanlong Zhang
Dr. Man-Chun Tseng
Dr. Fion Sze Yan Yeung
Dr. Aochen Du
Guest Editors

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Keywords

  • liquid crystal photonics
  • liquid crystal displays
  • display technology
  • liquid crystal application
  • display application

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Published Papers (1 paper)

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Research

12 pages, 2471 KiB  
Article
Tripling Optical Efficiency of Pancake Optics for Virtual Reality Displays
by Yuze Xiao, Jiazhan Zhang, Yun Ye, Sheng Xu, Qun Yan, Tailiang Guo and Enguo Chen
Crystals 2025, 15(1), 49; https://doi.org/10.3390/cryst15010049 - 2 Jan 2025
Viewed by 440
Abstract
The pancake structure is the mainstream optical solution for virtual reality (VR) displays due to its compact, folded optical path. However, only a small portion of the light can pass through the pancake optical engine because the incident light has to be polarized [...] Read more.
The pancake structure is the mainstream optical solution for virtual reality (VR) displays due to its compact, folded optical path. However, only a small portion of the light can pass through the pancake optical engine because the incident light has to be polarized and directed to the half mirror (HM) twice. In order to improve the optical efficiency, a new pancake optical engine is proposed for VR display, which employs a diffractive deflection film (DDF) with different focal lengths in three regions and two cholesteric liquid crystal (CLC) lenses that respond to circularly polarized light. The CLC lenses are modeled, and their polarization response characteristics are verified. The pancake system is simulated and optimized in terms of image quality and evaluated for optical efficiency, achieving 2.86 times the optical efficiency of the conventional pancake system, and the root mean square (RMS) radius of the system is controlled within 19 μm, and the modulation transfer function (MTF) at the cut-off frequency is greater than 0.2. The results indicate that this structure has great potential in the VR display field. Full article
(This article belongs to the Special Issue Liquid Crystal Photonics and Emerging Displays)
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