Interacting with 3D Images on a Rear-projection Tabletop 3D Display Using Wireless Magnetic Markers and an Annular Coil Array

2019 ◽  
Author(s):  
Shunsuke Yoshida ◽  
Ryo Sugawara ◽  
Jiawei Huang ◽  
Yoshifumi Kitamura
Keyword(s):  
3D Display ◽  
Coil Array ◽  
3D Images ◽  
Magnetic Markers ◽  
Rear Projection

Full-parallax 3D display using time-multiplexing projection technology

2020 ◽  
Vol 2020 (2) ◽  
pp. 100-1-100-6
Author(s):  
Takuya Omura ◽  
Hayato Watanabe ◽  
Naoto Okaichi ◽  
Hisayuki Sasaki ◽  
Masahiro Kawakita
Keyword(s):  
Incident Light ◽  
Polarization State ◽  
3D Image ◽  
3D Display ◽  
Time Division Multiplexing ◽  
3D Images ◽  
Polarization Gratings ◽  
Light Rays ◽  
Time Division

We enhanced the resolution characteristics of a threedimensional (3D) image using time-division multiplexing methods in a full-parallax multi-view 3D display. A time-division light-ray shifting (TDLS) method is proposed that uses two polarization gratings (PGs). As PG changes the diffraction direction of light rays according to the polarization state of the incident light, this method can shift light rays approximately 7 mm in a diagonal direction by switching the polarization state of incident light and adjusting the distance between the PGs. We verified the effect on the characteristics of 3D images based on the extent of the shift. As a result, the resolution of a 3D image with depth is improved by shifting half a pitch of a multi-view image using the TDLS method, and the resolution of the image displayed near the screen is improved by shifting half a pixel of each viewpoint image with a wobbling method. These methods can easily enhance 3D characteristics with a small number of projectors.

Sourcing and Qualifying Passive Polarised 3D TVs

2021 ◽  
Vol 2021 (2) ◽  
pp. 100-1-100-6
Author(s):  
Andrew J. Woods
Keyword(s):  
Liquid Crystal ◽  
3D Display ◽  
Consumer Market ◽  
Testing Technique ◽  
Stereoscopic 3D ◽  
Wide Range ◽  
3D Displays ◽  
Liquid Crystal Shutter ◽  
Rear Projection

Millions of Stereoscopic 3D capable TVs were sold into the consumer market from 2007 through to 2016. A wide range of display technologies were supported including rear-projection DLP, Plasma, LCD and OLED. Some displays supported the Active 3D method using liquid-crystal shutter glasses, and some displays supported the Passive 3D method using circularly polarised 3D glasses. Displays supporting Full-HD and Ultra-HD (4K) resolution were available in sizes ranging from 32" to 86" diagonal. Unfortunately display manufacturers eventually changed their focus to promoting other display technologies and 2016 was the last year that new 3D TVs were made for the consumer market. Fortunately, there are still millions of 3D displays available through the secondhand- market, however it can be difficult to know which displays have 3D display support. This paper will provide a listing of specifically Passive 3D TVs manufactured by LG, however it has been our experience that the 3D quality varied considerably from one display to another hence it is necessary to qualify the quality of the 3D available on these displays using a testing technique that will be described in the paper.

scholarly journals RePro3D: Full-parallax 3D Display for Superimposing 3D Images onto the Real World using Retro-reflective Projection Technology

2012 ◽  
Vol 66 (4) ◽  
pp. J101-J107
Author(s):  
Takumi Yoshida ◽  
Sho Kamuro ◽  
Kouta Minamizawa ◽  
Hideaki Nii ◽  
Susumu Tachi
Keyword(s):  
Real World ◽  
3D Display ◽  
3D Images ◽  
The Real

Protruding apparent 3D images in depth-fused 3D display

2008 ◽  
Vol 54 (2) ◽  
pp. 233-239 ◽  
Author(s):  
Hideaki Takada ◽  
Shiro Suyama ◽  
Munekazu Date ◽  
Yoshimitsu Ohtani
Keyword(s):  
3D Display ◽  
3D Images

Light field display using wavelength division multiplexing

2020 ◽  
Vol 2020 (2) ◽  
pp. 101-1-101-4
Author(s):  
Masaki Yamauchi ◽  
Tomohiro Yendo
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Speed ◽  
Light Field ◽  
Wavelength Modulation ◽  
3D Display ◽  
Mechanical Motion ◽  
3D Images ◽  
Wavelength Division ◽  
Binary Images ◽  
Time Division

We propose a large screen 3D display which enables multiple viewers to see simultaneously without special glasses. In prior researches, methods of using a projector array or a swinging screen were proposed. However, the former has difficulty in installing and adjusting a large number of projectors and the latter cases occurrence of vibration and noise because of the mechanical motion of the screen. Our proposed display consists of a wavelength modulation projector and a spectroscopic screen. The screen shows images of which color depends on viewing points. The projector projects binary images to the screen in time-division according to wavelength of projection light. The wavelength of the light changes at high-speed with time. Therefore, the system can show 3D images to multiple viewers simultaneously by projecting proper images according to each viewing points. The installation of the display is easy and vibration or noise are not occurred because only one projector is used and the screen has no mechanical motion. We conducted simulation and confirmed that the proposed display can show 3D images to multiple viewers simultaneously.

scholarly journals A scalable diffraction-based scanning 3D colour video display as demonstrated by using tiled gratings and a vertical diffuser

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Jia Jia ◽  
Jhensi Chen ◽  
Jun Yao ◽  
Daping Chu
Keyword(s):  
Optical Information ◽  
Proof Of Concept ◽  
Viewing Angle ◽  
Video Display ◽  
3D Display ◽  
High Quality ◽  
3D Images ◽  
Concept System ◽  
High Bandwidth ◽  
Bandwidth Distribution

Abstract A high quality 3D display requires a high amount of optical information throughput, which needs an appropriate mechanism to distribute information in space uniformly and efficiently. This study proposes a front-viewing system which is capable of managing the required amount of information efficiently from a high bandwidth source and projecting 3D images with a decent size and a large viewing angle at video rate in full colour. It employs variable gratings to support a high bandwidth distribution. This concept is scalable and the system can be made compact in size. A horizontal parallax only (HPO) proof-of-concept system is demonstrated by projecting holographic images from a digital micro mirror device (DMD) through rotational tiled gratings before they are realised on a vertical diffuser for front-viewing.

scholarly journals Aktina Vision: Full-parallax three-dimensional display with 100 million light rays

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hayato Watanabe ◽  
Naoto Okaichi ◽  
Takuya Omura ◽  
Masanori Kano ◽  
Hisayuki Sasaki ◽  
...  
Keyword(s):  
Light Field ◽  
Three Dimensional ◽  
Prototype System ◽  
3D Display ◽  
3D Images ◽  
Image Reproduction ◽  
Light Rays ◽  
Real Objects ◽  
Three Dimensional Display ◽  
First Time

AbstractNatural three-dimensional (3D) images, perceived as real objects in front of the viewer, can be displayed by faithfully reproducing light ray information. However, 3D images with sufficient characteristics for practical use cannot be displayed using conventional technologies because highly accurate reproduction of numerous light rays is required. We propose a novel full-parallax light field 3D display method named ‘Aktina Vision’, which includes a special top-hat diffusing screen with a narrow diffusion angle and an optical system for reproducing high-density light rays. Our prototype system reproduces over 100,000,000 light rays at angle intervals of less than 1° and optimally diffuses light rays with the top-hat diffusing screen. Thus, for the first time, light field 3D image reproduction with a maximum spatial resolution of approximately 330,000 pixels, which is near standard-definition television resolution and three times that of conventional light field display using a lens array, is achieved.

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