Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan

[Invited Lecture]Towards the World's Most Beautiful Autostereoscopic 3D Display

Takafumi KOIKE, Yutaka KANOU, GoroI HAMAGISHI, Hideya TAKAHASHI

Session ID: 23-02-01
Published: 2023
Released on J-STAGE: February 20, 2025

DOIhttps://doi.org/10.11371/wiieej.23.02.0_1

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RealImage Inc. was founded in April 2023 and is the first autostereoscopic 3D venture company in Japan using its proprietary technology. In this report, we will review the status of autostereoscopic 3D displays from a business perspective and then introduce the autostereoscopic 3D display technologies offered by RealImage Inc. and ourselves. This is a high-quality autostereoscopic 3D display using eye tracking and parallax barriers. We also briefly describe what applications we consider promising and the future direction of the technology.

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[Invited Lecture] ORIME: Development of origami devices that turn everyday objects into media

Yosuke Hori

Session ID: 23-02-02
Published: 2023
Released on J-STAGE: February 20, 2025

DOIhttps://doi.org/10.11371/wiieej.23.02.0_5

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The purpose of this research is to seamlessly connect information with the physical world. To realize this, I explored devices that can be changed shape freely like origami. I developed the device ORIME, inspired by origami. I created applications using ORIME, including a haptic device, an input device with touch sensors, a spherical device and devices for controlling stuffed toy like robot. Through these applications, I propose ORIME's potential as a media device.

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[Invited Lecture]Development of Magneto-optical Spatial Light Modulator for Holographic Display

－Toward Real 3-dimentional Image Reconstruction－

Kenji MACHIDA

Session ID: 23-02-03
Published: 2023
Released on J-STAGE: February 20, 2025

DOIhttps://doi.org/10.11371/wiieej.23.02.0_10

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We have been researching and developing a spatial image reconstruction method without the use of special glasses, aiming to realize diverse viewing styles in the future and offer new experiences beyond anything television has ever provided. Focusing on holography, which enables deeper depth reconstruction, the density of spatial light modulator (SLM) devices has been increased. Since a viewing zone angle of at least 30° is considered necessary for practical use, we proposed magneto-optical SLMs that can realize a device with a pixel pitch of 1 μm or less, and repeated prototyping and evaluation. In this paper, we report on our past research and development on magneto-optical SLMs.

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[Invited Talk] Digital Human Technologies for Internet Ads Content Creation

Takafumi TAKETOMI

Session ID: 23-02-04
Published: 2023
Released on J-STAGE: February 20, 2025

DOIhttps://doi.org/10.11371/wiieej.23.02.0_16

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In this talk, we introduce digital human technologies for Internet advertising content creation in CyberAgent. In the field of Internet ads, we need to prepare a variety of content to provide ads based on user preferences. To create various Internet ads content, computer graphics technology is one of the suitable solutions. In particular, the digital human technology receives much attention because it can be used to efficiently create various content using celebrities. However, there are still many technical problems to create photorealistic digital human. To solve these problems, we are developing technologies in CyberAgent AI Lab.

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[Invited Lecture] Principle of Aerial Display,Application Examples, and Future Prospects

Makoto Otsubo

Session ID: 23-02-05
Published: 2023
Released on J-STAGE: February 20, 2025

DOIhttps://doi.org/10.11371/wiieej.23.02.0_18

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In recent years, the outbreak of a new coronavirus in early 2020has brought the keyword “non-contact” into the global spotlight. Aerial displays are another promising technology. Recently, full scale studies for social implementation of non contact touch panels in public facilities and convenience stores have been attracting attention. We would like to provide airborne displays suitable for non contact operation as non contact items in various aspects of daily life and promote their spread to other fields, such as in vehicle use. In this lecture, the principle will be explained in the first half, application examples and case studies will be presented, and finally, future possibilities will be presented

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[Invited Lecture] Super high resolution liquid crystal spatial light modulators and improvement technologies of reconstructed-image quality in electronic holographic three-dimensional displays

Hideo FUJIKAKE, Masakazu NAKATANI

Session ID: 23-02-06
Published: 2023
Released on J-STAGE: February 20, 2025

DOIhttps://doi.org/10.11371/wiieej.23.02.0_23

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For improving the image quality of reproduced images in electronic holographic three-dimensional displays, we are systematically reviewing and developing the structure of liquid crystal spatial light modulators based on liquid crystal alignment behaviors analysis in microscopic areas. Liquid crystal spatial light modulators require driving with a narrow pixel pitch of 1 μm, which provides a practical wide viewing zone angle equivalent to human visual effective viewing angle of 30°. Therefore, based on elastic continuum analysis of liquid crystal alignment we inserted polymer walls to separate small pixels, for suppressing the leakage electric field and the elastic propagation of the liquid crystal alignment between small pixels. In such pixels, by reducing the elastic distortion of the liquid crystal with separating structure in pixels, stable initial alignment was achieved. On the other hand, for suppressing these adjacent pixel effects, driving the ferroelectric liquid crystal by constantly applying bipolar voltages, narrow pitch pixel driving was enabled, and wide viewing angle reproduction was confirmed. An optical diffraction simulation using light propagation method revealed that reconstructed image qualities such as the brightness, resolution, contrast ratio, and noise intensity , depend on non uniformity of the macroscopic liquid crystal layer thickness, disordered liquid crystal alignment within pixels, and the number of drive voltage gradations. Furthermore, for suppressing speckle noise in reconstructed images, which is a practical problem, we proposed the optical phase-disturbing device using liquid crystal alignment fluctuations for display optics, and experimentally confirmed its improvement effect.

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