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Special Issue Article Open Access
This paper goes through an overview of an emerging display technology; Heliodisplay. It is an air-based display, using principally air that is already present in the operating environment. The system uses a projection unit focused onto multiple layers of air and dry micron-size atomized particles in mid-air, resulting in a two-dimensional display that appears to float. The system comprises a self-generating means for creating this dynamic, non-solid particle cloud. Particle cloud is created by ejecting atomized condensate present in the surrounding air, in a controlled fashion to air. A projection system consisting of an image generating means and projection optics, projects an image onto the particle cloud. As dark areas of the image may appear invisible, the image may be more realistic than on a projection screen, although it is still not volumetric. Any physical intrusion, occurring spatially within the image region, is captured by a detection system and the intrusion information is used to enable real-time user interaction in updating the image. A PC sees the Heliodisplay as a pointing device, like a mouse. Finger, pen, or another object can be used as cursor control and navigate or interact with simple content. The interactive version ("i") of the heliodisplay contains an embedded processor that controls these functions internally for single touch, or multiple touches.