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12 January 2005 Key factors in the design of a LED volumetric 3D display system
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Through careful consideration of key factors that impact upon voxel attributes and image quality, a volumetric three-dimensional (3D) display system employing the rotation of a two-dimensional (2D) thin active panel was developed. It was designed as a lower-cost 3D visualization platform for experimentation and demonstration. Light emitting diodes (LEDs) were arranged into a 256x64 dot matrix on a single surface of the panel, which was positioned symmetrically about the axis of rotation. The motor and necessary supporting structures were located below the panel. LEDs individually of 500 ns response time, 1.6 mm×0.8 mm×0.6 mm external dimensions, 0.38 mm×0.43 mm horizontal and vertical spacing were adopted. The system is functional, providing 512×256×64, i.e. over 8 million addressable voxels within a 292 mm×165 mm cylindrical volume at a refresh frequency in excess of 16 Hz. Due to persistence of vision, momentarily addressed voxels will be perceived and fused into a 3D image. Many static or dynamic 3D scenes were displayed, which can be directly viewed from any position with few occlusion zones and dead zones. Important depth cues like binocular disparity and motion parallax are satisfied naturally.
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Yuanfang Lin, Xu Liu, Yi Yao, Xiaojie Zhang, Xiangdong Liu, and Fengchun Lin "Key factors in the design of a LED volumetric 3D display system", Proc. SPIE 5632, Light-Emitting Diode Materials and Devices, (12 January 2005);

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