Enlargement of viewing area of stereoscopic full-color LED display by use of a parallax barrier

Yamamoto, Hirotsugu; Kouno, M.; Muguruma, Syuji; Hayasaki, Yoshio; Nagai, Yoshifumi; Shimizu, Yoshinori; Nishida, Nobuo

doi:10.1364/ao.41.006907

Cited by 43 publications

(21 citation statements)

References 3 publications

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“…The two main approaches to achieve spatial multiplexing: parallax barriers [21] and lenticular systems [22]. The barriers can be considered a mature technology because some commercial devices based on them have been produced.…”

Section: State Of the Art Of Spatial Multiplexing Techniquementioning

confidence: 99%

Liquid Crystal Microlenses for Autostereoscopic Displays

et al. 2016

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Three-dimensional vision has acquired great importance in the audiovisual industry in the past ten years. Despite this, the first generation of autostereoscopic displays failed to generate enough consumer excitement. Some reasons are little 3D content and performance issues. For this reason, an exponential increase in three-dimensional vision research has occurred in the last few years. In this review, a study of the historical impact of the most important technologies has been performed. This study is carried out in terms of research manuscripts per year. The results reveal that research on spatial multiplexing technique is increasing considerably and today is the most studied. For this reason, the state of the art of this technique is presented. The use of microlenses seems to be the most successful method to obtain autostereoscopic vision. When they are fabricated with liquid crystal materials, extended capabilities are produced. Among the numerous techniques for manufacturing liquid crystal microlenses, this review covers the most viable designs for its use in autostereoscopic displays. For this reason, some of the most important topologies and their relation with autostereoscopic displays are presented. Finally, the challenges in some recent applications, such as portable devices, and the future of three-dimensional displays based on liquid crystal microlenses are outlined.

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Section: State Of the Art Of Spatial Multiplexing Techniquementioning

confidence: 99%

Liquid Crystal Microlenses for Autostereoscopic Displays

et al. 2016

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“…The barrier selectively occludes pixels enabling certain pixels to be viewed selectively from certain angles, so projecting two disparate (half intensity) images in slightly different directions from a single pixel raster. A variety of barrier patterns have been experimented with, from slanted barriers [3] to aperture grills [32,13] which can enhance intensity and spatial resolution. If the viewer is positioned so that the two projections are directed independently to each eye -the "sweet spot" of the display -a convincing depth perception illusion is created.…”

Section: Related Workmentioning

confidence: 99%

Virtual Volumetric Graphics on Commodity Displays Using 3D Viewer Tracking

Malleson

Collomosse

2012

Int J Comput Vis

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Three dimensional (3D) displays typically rely on stereo disparity, requiring specialized hardware to be worn or embedded in the display. We present a novel 3D graphics display system for volumetric scene visualization using only standard 2D display hardware and a pair of calibrated web cameras. Our computer vision-based system requires no worn or other special hardware. Rather than producing the depth illusion through disparity, we deliver a full volumetric 3D visualization -enabling users to interactively explore 3D scenes by varying their viewing position and angle according to the tracked 3D position of their face and eyes. We incorporate a novel wand-based calibration that allows the cameras to be placed at arbitrary positions and orientations relative to the display. The resulting system operates at real-time speeds (∼ 25 fps) with low latency (120 − 225 ms) delivering a compelling natural user interface and immersive experience for 3D viewing. In addition to objective evaluation of display stability and responsiveness, we report on user trials comparing users' timings on a spatial orientation task.

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“…Volumetric 3D display has been realized by use of his optical element [7]. Although we have realized several types of stereoscopic LED display by use of a large parallax barrier [8][9][10][11][12], floating LED signage has not realized yet. There was no optical elements that are suitable to form a floating image of a large LED panel.…”

Section: Introductionmentioning

confidence: 99%

Design of crossed-mirror array to form floating 3D LED signs

et al. 2012

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3D representation of digital signage improves its significance and rapid notification of important points. Our goal is to realize floating 3D LED signs. The problem is there is no sufficient device to form floating 3D images from LEDs. LED lamp size is around 1 cm including wiring and substrates. Such large pitch increases display size and sometimes spoils image quality. The purpose of this paper is to develop optical device to meet the three requirements and to demonstrate floating 3D arrays of LEDs. We analytically investigate image formation by a crossed mirror structure with aerial aperture, called CMA (crossed-mirror array). CMA contains dihedral corner reflectors at each aperture. After double reflection, light rays emitted from an LED will converge into the corresponding image point. We have fabricated CMA for 3D array of LEDs. One CMA unit contains 20 x 20 apertures that are located diagonally. Floating image of LEDs was formed in wide range of incident angle. The image size of focused beam agreed to the apparent aperture size. When LEDs were located three-dimensionally (LEDs in three depths), the focused distances were the same as the distance between the real LED and the CMA.

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Enlargement of viewing area of stereoscopic full-color LED display by use of a parallax barrier

Cited by 43 publications

References 3 publications

Liquid Crystal Microlenses for Autostereoscopic Displays

Liquid Crystal Microlenses for Autostereoscopic Displays

Virtual Volumetric Graphics on Commodity Displays Using 3D Viewer Tracking

Design of crossed-mirror array to form floating 3D LED signs

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