Operating scheme for the light-emitting diode array of a volumetric display that exhibits multiple full-color dynamic images

Ryuji Hirayama; Atsushi Shiraki; Hirotaka Nakayama; Takashi Kakue; Tomoyoshi Shimobaba; Tomoyoshi Ito

doi:10.1117/1.OE.56.7.073108

25 July 2017 Operating scheme for the light-emitting diode array of a volumetric display that exhibits multiple full-color dynamic images

Ryuji Hirayama, Atsushi Shiraki, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

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Optical Engineering, Vol. 56, Issue 7, 073108 (July 2017). https://doi.org/10.1117/1.OE.56.7.073108

Abstract

We designed and developed a control circuit for a three-dimensional (3-D) light-emitting diode (LED) array to be used in volumetric displays exhibiting full-color dynamic 3-D images. The circuit was implemented on a field-programmable gate array; therefore, pulse-width modulation, which requires high-speed processing, could be operated in real time. We experimentally evaluated the developed system by measuring the luminance of an LED with varying input and confirmed that the system works appropriately. In addition, we demonstrated that the volumetric display exhibits different full-color dynamic two-dimensional images in two orthogonal directions. Each of the exhibited images could be obtained only from the prescribed viewpoint. Such directional characteristics of the system are beneficial for applications, including digital signage, security systems, art, and amusement.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Ryuji Hirayama, Atsushi Shiraki, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, and Tomoyoshi Ito "Operating scheme for the light-emitting diode array of a volumetric display that exhibits multiple full-color dynamic images," Optical Engineering 56(7), 073108 (25 July 2017). https://doi.org/10.1117/1.OE.56.7.073108

Received: 2 May 2017; Accepted: 5 July 2017; Published: 25 July 2017

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