📺
Survey of Alternative Displays
  • Survey of Alternative Displays - 2024 Update Notes
  • 2022 Update Notes
  • Introduction
  • Outline
  • Standard Displays
    • Standard Displays Overview
    • LED
    • Projector
  • Alternative Displays
    • Overview
    • Transparent
    • Volumetric Displays
    • Modified Polarizers
    • Electronic Paper/E-Ink
    • Flexible Displays
    • Lasers and Laser Projectors
    • Lenticular and Multiview Displays
    • Light-field Displays
    • Head Mounted Displays
    • Circular and Non Rectangular
  • Techniques
    • Overview
    • Pepper's Ghost
    • Projection on Static Transparent Material
    • Volumetric Projection
    • Projection on Water or Fog
    • Diffusion and Distortion Techniques
  • Experimental/Other
    • Overview
    • Physical/Mechanical Displays
    • Switchable Glass
    • Drone Displays
    • Ultrasonic Atomization of Water
    • Electrochromic Paint
    • Light activated and other Reactive Surfaces and Materials
    • Scanning Fiber Optics
    • Acoustic Levitation Display
    • Plasma Combustion
    • High Refresh Rate Displays
    • Other Experiments
  • Legacy
    • Overview
    • Cathode Ray Tube
    • Eggcrate and other Numeric Displays
    • Glasses-enabled 3D
    • Pyrotechnics and Other Curiosities
  • Closing Notes
  • Appendix
    • Holograms and the Ideal Display
    • Misleading Terms
    • Notes about Touch Screens
    • Virtual Production and XR
    • LCD Polarizer Removal
    • DIY Transparent Screens
    • Acknowledgements and Additional References
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  1. Experimental/Other

Acoustic Levitation Display

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Last updated 3 years ago

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Also referred to as an Acoustophoretic Volumetric Display

This area of research uses ultrasonic soundwaves and the principle of standing waves to "levitate" thin and light particles of material and (in some cases) move them at a high enough speed to make coherent images and shapes. The applications of this technology are somewhat limited to small scale particles and small display areas, but it is worth seeing this as another unusual area of display research.

Another example from the University of Tokyo that levitates small bits of foam with different shapes:

More links:

There are a number of labs and researchers exploring this technique There is a DIY approach called a .

There is from the University of Sussex

For the above: Yoichi Ochiai / 落合陽一(The University of Tokyo / 東京大学) Takayuki Hoshi / 星貴之(Nagoya Institute of Technology / 名古屋工業大学) Jun Rekimoto / 暦本純一 (The University of Tokyo / Sony CSL) White paper:

There are even that allow for home experimentation with standing waves on a micro scale.

Sonic Surface
JOLED
https://arxiv.org/abs/1312.4006
small DIY kits
https://hackaday.com/tag/acoustic-levitation/