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A successful test of Ferroelectric Liquid Crystal Displays (FLCD) on Gen 4.5 is realized in this paper. A new polyimide (PI) that can replace Nylon 6 (N6) is synthesized and tested on the production line. This used to be the barrier in the commercialization of FLCD. Apart from that, a new FLC for mass production is synthesized. To investigate the surface energy and relative performance, various materials are compared. This proof of the feasibility on the production line is a significant step towards the commercialization of field-sequential-color high-resolution FLCDs.

A high-efficiency (97%) fast polarization converter (100 kHz) is achieved using Ferroelectric Liquid Crystal (FLC). Innovatively, by cascading FLC cells, no diffraction and residual light loss are achieved. The flickering is less than 5%.. The contrast ratio is 1000:1. Bi-stable focus modulation is acheived. It is a promising candidate not just for display technologies, but also for high-efficiency beam-steering applications, such as Virtual Reality (VR)/Augmented Reality (AR), Light Ranging and Detection (LiDAR). © 2023, John Wiley and Sons Inc. All rights reserved.

We demonstrate a kind of in-cell solution-processed broadband circular polarizer made of liquid crystal polymer and a photo-aligned polarizer on top, using the coating technique and chemical treatment. The transmittance and reflectance spectrum shows a high ambient contrast ratio (ACR) improvement for the light-emitting display system. © 2023, John Wiley and Sons Inc. All rights reserved.

This work demonstrates a high-performance in-cell polarizer adopting photo-aligned azobenzene dyes. On the strength of the multilayered design, a simple fabrication process has been developed to assemble an in-cell polarizer. We have achieved a broadband dichroic ratio after the long-term stability test. Meanwhile, the cell with the proposed in-cell polarizer can be driven regularly without a voltage boost, which renders excellent practicability in liquid crystal display technologies. The structure, fabrication process, and properties of the in-cell polarizer in TN-LCD are thoroughly discussed. © 2023, John Wiley and Sons Inc. All rights reserved.

In this article, we proposed a passive vibration sensing system using a threshold-less deformed helix ferroelectric liquid crystal (DHFLC) cell. Combining the DHFLC cell, piezoelectric film, and optical detector, the system can transform the slight vibration into light intensity signal without a power supply. The system can reach the sensitivity of 165 V/(m/s) and the linearity<1% full range output. The proposed system will be combined with optical fibers to play an essential role in various vibration-sensing array applications. © 2023, John Wiley and Sons Inc. All rights reserved.

Techniques for using ferroelectric liquid crystals Dammann grating (FLCDG) for light detection and ranging devices are disclosed. In LiDAR devices, accuracy, response time, and cost performance can be limited by some factors, such as laser pulse width, time resolution of a time-to-digital con-version chip, detector bandwidth, shot noise, and time error generated by electronic circuits. A FLCDG-based architec-ture can improve a LiDAR device, and provide for one-shot capturing due to the high switching speed at very low driving voltage provided by ferroelectric liquid crystals and the equal diffracting ability of Dammann grating.

Barriers exits regarding increasing brightness and pixel density for various display technologies, be it, LCD, LED and OLED. In this paper, we proposed a defect-free high-contrast fast (~100us) active-matrix addressed DHFLC with a theoretical 11500 PPI due to its nature of no fringe field effect (FFE) and high capacitance, shedding a light on the barriers. For the realization, the no-storage-capacitor AM-DHFLC display device is fabricated as preliminary demo with both optimizations in the DHFLC alignment and pixel design. Innovatively, the no-storage-capacitor characteristic, which is impossible for NLC, not only rockets efficiency and aperture ratio from 57% to 83% with high brightness, but also reveals the potential in reducing the pixel size for higher resolution. Moreover, fast response around 100 us at 360 Hz for FSC display and no-FFE strengthen the promising potential of DHFLC in various modern display technologies, be it VR/AR, high PPI display, micro display, and high-resolution hologram. © 2022, John Wiley and Sons Inc. All rights reserved.

Realization of a near-eye, liquid-crystal (LC) display with resolution density > 2000 pixels per inch (PPI) is desired but places great demands on the choices of the LC and the thin-film transistor (TFT) backplane technology. Presently investigated is the requirement placed on the allowable leakage current in the off-state of a scan transistor in an active-matrix LC display. With the resolution boosted by the elimination of the storage capacitor, an even more stringent limit is placed on the leakage current. It is concluded that a backplane technology based on metal-oxide TFTs offering inherently low leakage current enables the construction of a higher-resolution display. As a demonstration, a 500 PPI display based on deformed-helix ferroelectric LC and indium-gallium-zinc oxide TFTs has been fabricated and characterized. © 2022. John Wiley and Sons Inc. AIAA. All rights reserved.

Here we disclose a fast (ON time ~50ps and OFF time~25ps at 55 °C), high-contrast, continuous phase modulator without fringe field effect (FFE). The phase modulator using the Kerr effect of vertical aligned deformed helix ferroelectric liquid crystal (VADHFLC). Specifically, FFE is a long-term problem for nematic liquid crystal (NLC). In this article, we are disclosing, for the lst-time found, that no FFE exists for VADHFLC, even for phase modulator with lpm pixel pitch, which is an attractive feature for ultra-high-resolution display and photonic applications. Moreover, the Kerr constant is 88 nm/V2, and the contrast ratio is larger than 1000:1. It is a promising candidatefor high-PPI AR/VR displays, wavelength selective switch (WSS), hologram, adaptive optics, and LiDARs. © 2022 SID.

Low-voltage fast switchable 1D and 2D Fibonacci grating (FbG), using an electrically suppressed helix ferroelectric liquid crystal (ESHFLC), with high diffraction efficiency for a super-resolution imaging system in far-field are disclosed in this paper. Specifically, the polarization-independent two-domain (0, π) structure is well designed based on photoalignment technology to maximize the total diffraction efficiency that can reach 97.4% (1st order:8.5%, 2nd order: 30%). Apart from that, the FLC gratings offer two tunable states: non-diffractive and diffractive states. Derived from the fast-response property of ferroelectric liquid crystal material, the switching speed of the 1D and 2D ESHFLC-FbG is 103µs at 4 V of the driving voltage. Furthermore, this system achieves the high-resolving power of (λ/2.25) for object detection based upon the intensity map received behind 1D ESHFLC-FbG at far-field. Contribution from the quasi-periodic FbG’s special ability to translate the super-resolution information (including at evanescent wave) into the detectable far-field region. Concisely, the proposed ESHFLC-FbG can be a promising candidate for a super-resolution imaging system, superstructure fibre sensor, and other photonic applications.