A Multi-Layered Display with Water DropsPeter Barnum Srinivasa Narasimhan Takeo Kanade
Robotics Institute, Carnegie Mellon University
SIGGRAPH 2010July 27, 2010
Types of Displays
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3D with Anaglyph glasses2D with an LCD monitor
3D with an etched glass cubeNayar 2007
3D with auto-stereoscopySony 2009
Water Drops Displays
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Pevnick et al. 1979-present Eitoku et al. 2006
Applications of Water Drop Displays
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Car show advertising
3D touchable display
Art exhibits
Interactive games
Water Drop Display 101
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Water Drop Display 101
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Water Drop Display 101
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How to Assemble a Water Drop Display
Step 1:Create the drops
Step 2:Find the drops
Step 3:Project on thedrops
Drop on Demand
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Challenges With Drop on Demand
Desired result
Satellite drops
Varyingtiming 10
Fluid Mechanics of Drop on Demand
1. The emitter diameter: 1 mm
2. The pressure differential: 10 kPa
3. The feed diameter: 19 mmEmitter
Feed
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Ambravaneswaran et al.2002Munson et al. 2009
Drop on Demand With a Linear Manifold
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Refresh hz = 60
Detecting Drop Locations
Drop hz = 30
FPS = 60
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Detecting Drop Locations
Drop hz = 30
FPS = 60Refresh hz = 60
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Detecting Drop Locations
Drop hz = 30
Refresh hz = 60FPS = 60
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How to Illuminate the Layer of Drops
Drop hz = 30
Refresh hz = 60FPS = 60
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Illuminating Multiple 2D Layers
Number of layers = MDrop hz = N
Refresh hz ≥ NM
Control and Data Flow
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CameraPG Firefly MV
ProjectorSony 3-LCD
Valve controlDuemilanove
ComputerQuad-Xeon
Graphics cardQuadro 4600
19Camera
Projector
Drop Emitters
A Single Emitter Manifold
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Diaphragm valve
Solenoid
50 metal needles
Plastic pipe
Synchronized Drops, Camera, and Projector
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High-Speed Video of the Emitted Drops
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High-Speed Video of the Emitted Drops
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Aquarium Simulator
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Red-Green-Blue
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Close-up
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Wide Viewing-Angle
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2.5D Tetris
Summary and Future Work
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Step 1:Create layers of drops
Step 3:Project on the drops
Step 2:Find the drops
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Step 1:Create morelayers of drops
Step 3:Project on the drops
Summary and Future Work
Step 2:Find the drops
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Step 1:Create morelayers of drops
Summary and Future Work
Step 3:Project fasteron the drops
Step 2:Find the drops
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The Dream: Touchable 3D Models
Acknowledgements
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Shelley AnnaLarry HayhurstScott SatkinYaser SheikhPrasanna Velagapudi Lynn WalkerLee WeissCMU and Georgia Tech graphics groups
Drop on Demand
Drop on Demand
Drop on Demand
Water Drop Display 101
Water Drop Display 101
Drop on Demand With a Linear Manifold
