Next Article in Journal
Catalytic Performance of SBA-15-Supported Poly (Styrenesulfonic Acid) in the Esterification of Acetic Acid with n-Heptanol
Next Article in Special Issue
Fluid Simulation with an L0 Based Optical Flow Deformation
Previous Article in Journal
Learning to Rank Sports Teams on a Graph
Previous Article in Special Issue
Effectiveness of Computer-Generated Virtual Reality (VR) in Learning and Teaching Environments with Spatial Frameworks
Article

High-Luminance Mid-Air Image Display for Outdoor Viewing by Focusing Sunlight

Department of Infomatics, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(17), 5834; https://doi.org/10.3390/app10175834
Received: 8 July 2020 / Revised: 6 August 2020 / Accepted: 21 August 2020 / Published: 23 August 2020
(This article belongs to the Special Issue Computer Graphics and Virtual Reality)
The mid-air image is a very powerful method for presenting computer graphics in a real environment, but it cannot be used in bright locations owing to the decrease in brightness during the imaging process. Therefore, to form a mid-air image with a high-brightness light source, a square pyramidal mirror structure was investigated, and the sunlight concentration was simulated. We simulated the tilt angle and combination angle of the condenser as parameters to calculate the luminance of the surface of a transparent liquid crystal display. The light collector was installed at 55 from the horizontal plane and mirror. A high level of illumination was obtained when these were laminated together at an angle of 70. To select a suitable diffuser, we prototyped and measured the brightness of the mid-air image with an LED lamp to simulate sunlight in three settings: summer solstice, autumnal equinox, and winter solstice. The maximum luminance of the mid-air image displayed by collecting actual sunlight was estimated to be 998.6 cd/m2. This is considerably higher than the maximum smartphone brightness to allow for outdoor viewing, and it can ensure fully compatible visibility. View Full-Text
Keywords: mid-air image; high luminance; liquid crystal display mid-air image; high luminance; liquid crystal display
Show Figures

Figure 1

MDPI and ACS Style

Koizumi, N.; Yuzurihara, K. High-Luminance Mid-Air Image Display for Outdoor Viewing by Focusing Sunlight. Appl. Sci. 2020, 10, 5834. https://doi.org/10.3390/app10175834

AMA Style

Koizumi N, Yuzurihara K. High-Luminance Mid-Air Image Display for Outdoor Viewing by Focusing Sunlight. Applied Sciences. 2020; 10(17):5834. https://doi.org/10.3390/app10175834

Chicago/Turabian Style

Koizumi, Naoya, and Koki Yuzurihara. 2020. "High-Luminance Mid-Air Image Display for Outdoor Viewing by Focusing Sunlight" Applied Sciences 10, no. 17: 5834. https://doi.org/10.3390/app10175834

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop