Fast response film-compensated liquid crystal on silicon display

2006 ◽  
Vol 89 (3) ◽  
pp. 031104 ◽  
Author(s):  
X. J. Yu ◽  
H. S. Kwok
Keyword(s):  
Liquid Crystal ◽  
Fast Response ◽  
Liquid Crystal On Silicon

scholarly journals Liquid-Crystal-on-Silicon for Augmented Reality Displays

2018 ◽  
Vol 8 (12) ◽  
pp. 2366 ◽  
Author(s):  
Yuge Huang ◽  
Engle Liao ◽  
Ran Chen ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
Augmented Reality ◽  
Fast Response ◽  
Vertical Alignment ◽  
Head Mounted Displays ◽  
Fringing Field ◽  
Pros And Cons ◽  
Liquid Crystal On Silicon ◽  
Fringing Field Effect ◽  
Holographic Displays

In this paper, we review liquid-crystal-on-silicon (LCoS) technology and focus on its new application in emerging augmented reality (AR) displays. In the first part, the LCoS working principles of three commonly adopted LC modes—vertical alignment and twist nematic for amplitude modulation, and homogeneous alignment for phase modulation—are introduced and their pros and cons evaluated. In the second part, the fringing field effect is analyzed, and a novel pretilt angle patterning method for suppressing the effect is presented. Moreover, we illustrate how to integrate the LCoS panel in an AR display system. Both currently available intensity modulators and under-developing holographic displays are covered, with special emphases on achieving high image quality, such as a fast response time and high-resolution. The rapidly increasing application of LCoS in AR head-mounted displays and head-up displays is foreseeable.

scholarly journals Fast-Response Liquid Crystal for Spatial Light Modulator and LiDAR Applications

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 93
Author(s):  
Junyu Zou ◽  
Qian Yang ◽  
En-Lin Hsiang ◽  
Haruki Ooishi ◽  
Zhuo Yang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Fast Response ◽  
Blue Laser ◽  
Dielectric Anisotropy ◽  
Light Modulator ◽  
High Brightness ◽  
High Birefringence ◽  
Low Viscosity ◽  
Liquid Crystal On Silicon

We report a new nematic mixture for liquid-crystal-on-silicon spatial light modulator (SLM) and light detection and ranging (LiDAR) applications. The mixture exhibits a relatively high birefringence (Δn), moderate dielectric anisotropy (Δɛ), low viscosity, and reasonably good photostability. To achieve 2π phase change at 5 V, the response time (on + off) is 2.5 ms at 40 °C with λ = 633 nm, and 5.9 ms with λ = 905 nm. After exposure by a blue laser (λ = 465 nm) with a total dosage up to 20 MJ/cm2, this mixture shows no sign of photodegradation. Widespread applications of this material for high brightness SLMs, LiDAR, near-eye displays, and head-up displays are foreseeable.

scholarly journals Fast-Response Liquid Crystal Phase Modulators with an Excellent Photostability

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 765 ◽  
Author(s):  
Qian Yang ◽  
Junyu Zou ◽  
Yannanqi Li ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
Fast Response ◽  
Laser Wavelength ◽  
Blue Laser ◽  
Spatial Light Modulators ◽  
High Brightness ◽  
Light Modulators ◽  
Phase Modulators ◽  
Liquid Crystal On Silicon ◽  
Measured Response

We report a new mixture, which is modified from Merck TL-216, for liquid-crystal-on-silicon spatial light modulators (SLMs). To achieve 2π phase change at λ = 633 nm with 5 V operation voltage, the measured response time is about 3 ms at 50 °C. Meanwhile, our mixture exhibits no sign of photodegradation and even the total dosage has exceeded 400 MJ/cm2 at a blue laser wavelength λ = 465 nm. In comparison, E7 died at about 30 MJ/cm2. Widespread applications of this material for high brightness SLMs, near-eye displays, and head-up displays are foreseeable.

scholarly journals Generation of diffractive optical elements onto photopolymer using liquid crystal on silicon displays

2017 ◽  
Author(s):  
Roberto Fernandez ◽  
Sergi Gallego ◽  
Francisco J. Martinez ◽  
Andres Marquez ◽  
Inmaculada Pascual ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Liquid Crystal On Silicon

Fast response liquid crystal mode

2013 ◽  
Vol 21 (5) ◽  
pp. 209-212
Author(s):  
Chung-Yung Lee ◽  
Man-Chun Tseng ◽  
Hoi-Sing Kwok
Keyword(s):  
Liquid Crystal ◽  
Fast Response

AN ELECTRICALLY TUNABLE FOCUSING PICO PROJECTION SYSTEM BASED ON A LIQUID CRYSTAL LENS ADOPTING A LIQUID CRYSTAL AND POLYMER COMPOSITE FILM

2011 ◽  
Vol 20 (04) ◽  
pp. 477-484 ◽  
Author(s):  
HUNG-CHUN LIN ◽  
MING-SYUAN CHEN ◽  
YI-HSIN LIN
Keyword(s):  
Liquid Crystal ◽  
Composite Film ◽  
Polymer Composite ◽  
Optical Analysis ◽  
Projection System ◽  
Polymer Composite Film ◽  
Liquid Crystal On Silicon ◽  
Focusing Lens ◽  
Liquid Crystal Lens ◽  
Image Performance

An electrically tunable liquid-crystal-on-silicon (LCOS)-based pico projection system based on a liquid crystal lens adopting a liquid crystal and polymer composite film (LCPCF) is demonstrated. The LC lens consists of two built-in sub-lenses: one is an electrically tunable focusing lens controlled by a LC layer and the other is a fixed focused LCPCF lens. The electrically tunable focusing range of the pico projection system is 200 cm to ~7 cm when the voltage is from 0 to 35 Vrms. The image performance is also demonstrated. The related optical analysis is discussed. This study opens a new window for electrically tunable focusing pico projection system.

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