Liquid Crystal Active Glasses for 3D Cinema

Srivastava, Abhishek Kumar; Tocnaye, Jean-Louis de Bougrenet de la; Dupont, Laurent

doi:10.1109/jdt.2010.2044743

Cited by 60 publications

(36 citation statements)

References 18 publications

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“…The diffracted beam intensity almost saturates at electric field higher than 8 V. This type of electric field dependence of intensity, of the main as well as the diffracted beams, can be explained by the simple electro-optics of liquid crystals. [8][9][10][11] Similar dependences have also been observed for the single walled carbon nano-tubes (SWCNTs) doped FLCs that have been discussed later in the article. The first order diffraction efficiency, i.e., the ratio of intensities of first order and zero order maxima, for pure FLC is limited only up to 42%.…”

supporting

confidence: 52%

“…But the diffraction efficiency of the pure FLC systems is usually very low for many applications. 9,11 Only the first order of diffraction appears with increasing electric field, i.e., in Fig. 1.…”

mentioning

confidence: 96%

“…6,7 The FLC cell, placed between crossed polarizers, diffracts light in the dark state and frustratingly decreases the display quality. 8,9 These diffraction lobes appear only in the direction perpendicular to the alignment direction. Fig.…”

mentioning

confidence: 99%

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Single walled carbon nano-tube, ferroelectric liquid crystal composites: Excellent diffractive tool

Srivastava

Pozhidaev

Chigrinov

et al. 2011

Applied Physics Letters

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We present a switchable grating based on chiral single walled carbon nano-tube (SWCNT) doped ferroelectric liquid crystals (FLCs). The presence of SWCNTs improves the diffraction profile of the pure FLC. The diffraction efficiency, i.e., the ratio of intensities of first order and zero order maxima is more than 100% for the higher concentration of SWCNTs in pure FLC. This phenomenon has been explained by the decrease in ferroelectric domain periodicity, due to the doping of SWCNTs in pure FLC, and optical activity of the chiral SWCNTs. These gratings with very high diffraction efficiency may find application in many devices.

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supporting

confidence: 52%

mentioning

confidence: 96%

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Single walled carbon nano-tube, ferroelectric liquid crystal composites: Excellent diffractive tool

Srivastava

Pozhidaev

Chigrinov

et al. 2011

Applied Physics Letters

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“…Then, it is appropriate to encode and break four frames, so that anniversary angel is apparent by the eye and user it is advised to be. Three techniques are commonly relied on for stereoscopic visualization: coding by blush (spectral multiplexing), animosity (polar multiplexing) and time (temporal multiplexing) [4] It results that, for 3D Dual- [5] to prevent the ghosting, increasing the whole system cost. Using two orthogonal polarized lights to implement 3D projection requires a single pair of orthogonal polarizing filters.…”

Section: D Dual-view Solutionsmentioning

confidence: 99%

Implementation of Ghosting Effects in 3D Dual-View Projection System

B¹,

Seshagiri²

2015

International Journal of Innovative Research in Electrical, Ele

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Abstract:In the proposed scheme various technical options to implement 3D dual-view systems, from four frames generated by two triggered or non-triggered 3D projectors. Such a technique offers 3D free-viewpoint capabilities for two viewers. We compare two different technical implementations based on transmissive video projection and reflective silver screen, combining two different 3D encoding techniques: polarization and time multiplexing. The main objective is to analyze and mitigate the ghosting effects, as a function of the technical, modal and frame pairing choices with respect, first to the image optical quality and second to prevent visual fatigue. DUAL-VIEW is an intrinsic capability of TVs or video projectors displaying 3D contents. Dual-View TVs basically play two full HD image streams that can be tuned by the viewers wearing compatible glasses. It means that two users watching the same TV can watch different channels in full HD. In other words, the stereo pair is used to separate the streams for two different viewers. Consequently, watching 3D view requires at least four independent frames projection or display. The benefit is that 3D Dual-View enables two viewers to watch simultaneously two different 3D contents, as well as the possibility for these viewers to watch the same 3D content, but with different viewpoints, according to their location with respect to the screen. This provides the advantage of free viewpoint projection, which is not possible with conventional 3D contents.

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“…On the other hand, the s on 0:9À0:1 response time is usually fast and can be controlled by the electric field. 13,21 Thus, if we restrict ourselves to the response time only then the resulting device could be very fast. Therefore, in this article, we present a switchable grating based on fine striped three-electrode structure and a driving scheme to reduce the relaxation time.…”

mentioning

confidence: 99%

Switchable liquid crystal grating with sub millisecond response

Fan

Srivastava

Chigrinov

et al. 2012

Applied Physics Letters

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In present article, we disclose a fast switchable grating based on nematic liquid crystals. A fine striped electrode has been exploited to generate the grating profile and a driving scheme to drive the grating cell has also been proposed, which enable us to drive the cell up to very high frequency (∼2 kHz) with evident saturated optical states. The response time for the first order diffracted beam, at the electric field of 10 V/μm, is less than 100 μs and optical contrast is higher than 400:1. Thus, the proposed LC grating could find application in several advance electro-optical devices.

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Liquid Crystal Active Glasses for 3D Cinema

Cited by 60 publications

References 18 publications

Single walled carbon nano-tube, ferroelectric liquid crystal composites: Excellent diffractive tool

Single walled carbon nano-tube, ferroelectric liquid crystal composites: Excellent diffractive tool

Implementation of Ghosting Effects in 3D Dual-View Projection System

Switchable liquid crystal grating with sub millisecond response

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