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.

Fringing Field Effect of the Liquid-Crystal-on-Silicon Devices

2002 ◽  
Vol 41 (Part 1, No. 7A) ◽  
pp. 4577-4585 ◽  
Author(s):  
Kuan-Hsu Fan Chiang ◽  
Shin-Tson Wu ◽  
Shu-Hsia Chen
Keyword(s):  
Liquid Crystal ◽  
Field Effect ◽  
Silicon Devices ◽  
Fringing Field ◽  
Liquid Crystal On Silicon ◽  
Fringing Field Effect

scholarly journals Simple method to evaluate the pixel crosstalk caused by fringing field effect in liquid-crystal spatial light modulators

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Ignacio Moreno ◽  
María Del Mar Sánchez-López ◽  
Jeffrey A. Davis ◽  
Don M. Cottrell
Keyword(s):  
Liquid Crystal ◽  
Diffraction Efficiency ◽  
Field Effect ◽  
Spatial Light Modulators ◽  
Physical Parameters ◽  
Light Modulator ◽  
Simple Method ◽  
Fringing Field ◽  
Fringing Field Effect ◽  
The Impact

AbstractIn this work we provide a simple experimental method to measure and evaluate the pixel crosstalk in phase-only liquid-crystal displays caused by the fringing field effect. The technique is a reverse engineering method that does not require information about the microscopic physical parameters of the liquid-crystal material or details of the fabrication and electronics of the display. Instead, it is based on the overall effect on the diffraction efficiency of displayed binary phase gratings as a function of the addressed gray level. We show how the efficiency of the zero (DC) and first diffraction orders provides valuable information enough to identify and quantify the pixel crosstalk. The technique is demonstrated with a modern phase-only liquid-crystal on silicon (LCOS) spatial light modulator (SLM), illustrating the limitations that this effect imposes to the spatial resolution of the device and providing quantitative measurement of the impact on the diffraction efficiency.

Quantitative characterization of holographic displays based on liquid-crystal-on-silicon spatial light modulator

2020 ◽  
Vol 20 (10) ◽  
pp. 1136-1144
Author(s):  
Hong Joo Song ◽  
Jeongno Lee ◽  
Chul Jong Han ◽  
Kyoungwon Park ◽  
Yong Hyun Lee ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator ◽  
Quantitative Characterization ◽  
Liquid Crystal On Silicon ◽  
Holographic Displays

Novel super fast response vertical alignment-liquid crystal display with extremely wide temperature range

2014 ◽  
Vol 22 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Yosuke Iwata ◽  
Mitsuhiro Murata ◽  
Kohei Tanaka ◽  
Tadashi Ohtake ◽  
Hidefumi Yoshida ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Wide Temperature Range ◽  
Liquid Crystal Display ◽  
Fast Response ◽  
Vertical Alignment ◽  
Temperature Range

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.

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