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
Author(s):  
Ignacio Moreno ◽  
María Del Mar Sánchez-López ◽  
Jeffrey A. Davis ◽  
Don M. Cottrell

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.


2018 ◽  
Vol 8 (12) ◽  
pp. 2366 ◽  
Author(s):  
Yuge Huang ◽  
Engle Liao ◽  
Ran Chen ◽  
Shin-Tson Wu

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.


2004 ◽  
Vol 43 (1) ◽  
pp. 11 ◽  
Author(s):  
Boris Apter ◽  
Uzi Efron ◽  
Eldad Bahat-Treidel

2019 ◽  
Vol 46 (7) ◽  
pp. 0703002
Author(s):  
李丹 Dan Li ◽  
张宝龙 Baolong Zhang ◽  
郭海成 Hoising Kwok

2014 ◽  
Vol 53 (1) ◽  
pp. 014105 ◽  
Author(s):  
Francisco J. Martínez ◽  
Andrés Márquez ◽  
Sergi Gallego ◽  
Jorge Francés ◽  
Inmaculada Pascual

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