3D Touch Surface for Interactive Pseudo‐Holographic Displays

Christou, Adamos; Gao, Yuan; Navaraj, William Taube; Nassar, Habib; Dahiya, Ravinder

doi:10.1002/aisy.202000126

Cited by 19 publications

(19 citation statements)

References 22 publications

(23 reference statements)

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“…[31] The system used here is the upscaled version of the pseudoholographic display presented in our previous work. [1,32] 2D views of the final virtual 3D object are projected onto transparent screens placed at a 45 angle from the projection source. This arrangement creates the illusion of an object "floating" midair.…”

Section: Pseudoholographic Displaymentioning

confidence: 99%

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confidence: 99%

“…[4][5][6][7] These include pseudohologram, swept-volume, static-volume, and free-space displays. [1,2,4] There have been several commercial efforts also, including notable early starters such as Actuality Systems' Perspecta display, a 10 cm diameter swept-volume display, [8] and the LightSpace DepthCube, a stacked liquid crystal display (LCD) static-volume display. [9] Current commercial examples include Voxon's swept-volume display [10] and Looking Glass' light field technology.…”

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confidence: 99%

“…Although some wearable gadgets and touch-based approaches have been reported recently, they are limited to controlling the virtual object that is being displayed. [1] Controlling a virtual object is nowhere close to feeling the pressure exerted by its real counterpart or feeling the temperature. In this regard, addition of artificial touch sensation can deliver the additional dimension of interaction with virtual objects.With VR technologies on the rise, interactive systems that provide life-like feedback from virtual contacts can greatly enhance the immersive user experience.…”

mentioning

confidence: 99%

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Pseudo‐Hologram with Aerohaptic Feedback for Interactive Volumetric Displays

Christou

Chirila

Dahiya

2021

Advanced Intelligent Systems

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Midair display of a conventional 2D graphic as 3D virtual objects with real physical dimensions, much like the physical object being depicted, is an interesting approach for the next generation of virtual reality (VR) and augmented reality (AR) systems. [1][2][3] Few variants of such volumetric displays that allow 3D virtual objects to be viewable from all directions have been reported recently. [4][5][6][7] These include pseudohologram, swept-volume, static-volume, and free-space displays. [1,2,4] There have been several commercial efforts also, including notable early starters such as Actuality Systems' Perspecta display, a 10 cm diameter swept-volume display, [8] and the LightSpace DepthCube, a stacked liquid crystal display (LCD) static-volume display. [9] Current commercial examples include Voxon's swept-volume display [10] and Looking Glass' light field technology. [11] The major advantages of these systems over current AR/VRs are that they do not require the user to wear glasses or headwear. With suitable sensory feedback, these volumetric displays can possibly lead to interactive digital twins that can pair the virtual and physical worlds and drive innovations in several areas, including healthcare, space, medicine, and disaster management. However, most of the reported volumetric displays provide visual experience only, offering no possibility to feel the virtual object through touch. Although some wearable gadgets and touch-based approaches have been reported recently, they are limited to controlling the virtual object that is being displayed. [1] Controlling a virtual object is nowhere close to feeling the pressure exerted by its real counterpart or feeling the temperature. In this regard, addition of artificial touch sensation can deliver the additional dimension of interaction with virtual objects.With VR technologies on the rise, interactive systems that provide life-like feedback from virtual contacts can greatly enhance the immersive user experience. [12] Such systems can range from simple haptic feedback devices integrated in the controllers of gaming consoles to more complex approaches such as hapticenabled gloves [13][14][15][16][17][18] and midair haptic feedback delivery via ultrasonic waves. [19] Haptic feedback technologies are of great interest in several areas such as robotics, autonomous vehicles, and rehabilitation. [20][21][22][23][24][25][26] Systems that can bring together vision and tactile feedback experiences will find great interest in multiple sectors, including entertainment, education, medical, disaster management, security, telerobotics, and tactile communication. [2,[27][28][29][30] However, combining these interactive experiences in a complete system encompasses significant challenges in terms of technology complexity, cost, implementation, and safety.Herein, we present a pseudohologram with an air-based haptic feedback device to enable contact-free midair tactile

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Section: Pseudoholographic Displaymentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Pseudo‐Hologram with Aerohaptic Feedback for Interactive Volumetric Displays

Christou

Chirila

Dahiya

2021

Advanced Intelligent Systems

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“…Wearable systems incorporating physical, chemical, and biological sensors and actuators have rapidly become an inseparable part of our lives for their use in a wide range of applications, such as personalized health monitoring, wellness‐tracking, early‐warning for COVID‐19, exoskeletons, prosthetics, and interactive systems for augmented/virtual reality. [ 1–9 ] The continuous operation of these systems is juxtaposed with the reliable and sustainable energy sources, currently met through: a) energy harvesters based on mechanisms such as photovoltaics, [ 10–13 ] piezoelectricity, [ 14–16 ] triboelectricity, [ 14,17–19 ] and theremoelectricity, [ 20–22 ] etc. ; b) energy storage devices such as Li‐ion batteries (LiB) [ 23–27 ] and supercapacitors (SCs), [ 28–35 ] etc.…”

Section: Introductionmentioning

confidence: 99%

Energy Autonomous Sweat‐Based Wearable Systems

et al. 2021

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The continuous operation of wearable electronics demands reliable sources of energy, currently met through Li‐ion batteries and various energy harvesters. These solutions are being used out of necessity despite potential safety issues and unsustainable environmental impact. Safe and sustainable energy sources can boost the use of wearables systems in diverse applications such as health monitoring, prosthetics, and sports. In this regard, sweat‐ and sweat‐equivalent‐based studies have attracted tremendous attention through the demonstration of energy‐generating biofuel cells, promising power densities as high as 3.5 mW cm−2, storage using sweat‐electrolyte‐based supercapacitors with energy and power densities of 1.36 Wh kg−1 and 329.70 W kg−1, respectively, and sweat‐activated batteries with an impressive energy density of 67 Ah kg−1. A combination of these energy generating, and storage devices can lead to fully energy‐autonomous wearables capable of providing sustainable power in the µW to mW range, which is sufficient to operate both sensing and communication devices. Here, a comprehensive review covering these advances, addressing future challenges and potential solutions related to fully energy‐autonomous wearables is presented, with emphasis on sweat‐based energy storage and energy generation elements along with sweat‐based sensors as applications.

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Self‐Powered Active Sensing Based on Triboelectric Generators

Khandelwal

Dahiya

2022

Advanced Materials

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for above concepts. These technological tools require a large number of different types of sensors for real-time monitoring of the parameters of interest, with the aim of increasing efficiency or productivity, enabling predictive actions (e.g., maintenance, monitoring potential hotspots for spread of diseases) and optimizing supply chain and asset traceability while developing a safer and more secure environment. Accordingly, numerous physical, chemical, and biosensors based on different working mechanisms and transducer materials have been reported. [3][4][5][6] Most of these sensors require continuous operation, for which reliable power source is critical.The widely used power source is the batteries that are often bulky, have a limited lifetime, and are difficult to recycle because of toxic chemicals. [7] As a result, they compromise the sensors portability and, in certain cases, also require a complex and costly process to replace after they run out. Coin cells are other alternatives that are now heavily commoditized and usually present a low-cost solution for powering standalone, lightweight, portable, and miniaturized sensors. However, they still require replacement at regular intervals. A self-reliant and sustainable way of powering the sensors to acquire data and send them wirelessly to a data hub, would be ideal. One solution is to combine a small, long-life, energy-storage devices (e.g., a supercapacitor or a rechargeable solid-state battery) with an energy harvester or wireless powering device. [8] There are many ways of harvesting energy from the environment, from solar energy using photovoltaic panels, or heat using thermal electric generators and vibration with piezoelectric and triboelectric generators (TEGs). [9] Herein, we use the term triboelectric generator (TEG), which also covers the triboelectric nanogenerators (TENGs). If the energy budget is balanced correctly, these two components, i.e., energy storage device and the energy harvester, do not need to be large to work for a long time. The availability of ultralow-power electronics and the constantly improving efficiency of energy harvesting devices (e.g., high-efficiency indoor solar cells can provide at least 20 mW cm −2 and the TEGs can provide up to 50 mW cm −2 ) also support such solutions. [9a,10] Further, the sensors and power management integrated components are becoming increasingly less power hungry. [7b] However, this approach The demand for portable and wearable chemical or biosensors and their expeditious development in recent years has created a scientific challenge in terms of their continuous powering. As a result, mechanical energy harvesters such as piezoelectric and triboelectric generators (TEGs) have been explored recently either as sensors or harvesters to store charge in small, but long-life, energy-storage devices to power the sensors. The use of energy harvesters as sensors is particularly interesting, as with such multifunctional operations it is possible to reduce the number devices needed in a system, which a...

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3D Touch Surface for Interactive Pseudo‐Holographic Displays

Cited by 19 publications

References 22 publications

Pseudo‐Hologram with Aerohaptic Feedback for Interactive Volumetric Displays

Pseudo‐Hologram with Aerohaptic Feedback for Interactive Volumetric Displays

Energy Autonomous Sweat‐Based Wearable Systems

Self‐Powered Active Sensing Based on Triboelectric Generators

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