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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal06:24

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Related Experiment Video

Updated: Jan 19, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

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Phase flicker optimisation in digital liquid crystal on silicon devices.

H Yang, D P Chu

    Optics Express
    |September 13, 2019
    PubMed
    Summary

    Phase flickers in digital Liquid Crystal on Silicon (LCOS) devices impact optical performance. This study developed a method to predict and reduce phase flicker by optimizing pulse width modulation (PWM) waveforms, improving LCOS device performance.

    Area of Science:

    • Optoelectronics
    • Materials Science
    • Liquid Crystal Displays

    Background:

    • Digital Liquid Crystal on Silicon (LCOS) devices utilize Pulse Width Modulation (PWM) driving schemes.
    • Phase flickers in these devices degrade optical performance, particularly in non-display applications.
    • Understanding the PWM waveform's influence on phase flicker is crucial for performance enhancement.

    Purpose of the Study:

    • To investigate the relationship between PWM waveforms and phase flicker in digital LCOS devices.
    • To develop a predictive method for temporal phase response to PWM waveforms.
    • To identify low-flicker PWM waveforms without complex circuitry.

    Main Methods:

    • Analysis of the dependence of phase flicker magnitude on PWM pulse patterns.

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    Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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    Related Experiment Videos

    Last Updated: Jan 19, 2026

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    06:24

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    Published on: October 31, 2019

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    Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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  • Consideration of liquid crystal molecule dynamic response at various tilting angles.
  • Development of a generic method to predict temporal phase response to PWM waveforms.

    • Main Results:

    • A direct correlation was found between PWM pulse patterns, liquid crystal dynamics, and phase flicker magnitude.
    • A novel method accurately predicts the temporal phase response of LCOS devices to PWM.
    • Significant reduction of peak-to-peak phase flicker by over 80% (from ~0.16π to ~0.03π) was achieved at 30°C.

    Conclusions:

    • The developed method enables rapid identification of low-flicker PWM waveforms for digital LCOS devices.
    • Optimized PWM waveforms can substantially mitigate phase flicker, enhancing optical performance.
    • This approach offers a practical solution for improving LCOS device applications without hardware complexity.