Artificial Thermal Sensation: Stretchable Skin‐Like Cooling/Heating Device for Reconstruction of Artificial Thermal Sensation in Virtual Reality (Adv. Funct. Mater. 29/2020)

Lee, Jun Young; Sul, Heayoun; Lee, Wonha; Pyun, Kyung Rok; Ha, Inho; Kim, Dongkwan; Park, Hyojoon; Eom, Hyo J.; Yoon, Yeo Sung; Jung, Jinwook; Lee, Dongjun; Ko, Seung Hwan

doi:10.1002/adfm.202070196

Cited by 7 publications

(11 citation statements)

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“…Therefore, artificially reproducing controllable/accurate haptic signals with thermal sensation on the human epidermis is a primary research field for the reconstruction of further realistic VR environments. [ 152 ] For example, a microclimate control system is required to allow users to experience the same stimulation in cold or hot virtual environments. Textiles, considered as a second skin covering the human body, are ideal platforms for integrating a microclimate control system for achieving an immersive thermal feeling of VR/AR.…”

Section: Textile Electronic Devices For Vr/armentioning

confidence: 99%

“…developed a bifunctional (cold and hot sensations) thermo‐haptic device that actively heat up and cool down deformable skin surfaces. [ 152 ] Figure a provides a simplified illustration of the internal structure of a thermo‐haptic device. One side of the Cu electrode was coated with polyimide (PI), and a thin thermally conductive elastomer film was then used to encapsulate the PI.…”

Section: Textile Electronic Devices For Vr/armentioning

confidence: 99%

“…presented the use of textile devices for microclimate control and further evaluated the performance of fabricated devices to enhance the immersive feeling of wearable VR. [ 152 ] A wearable heat sink was integrated into a finger‐motion tracking glove and independently attached to three devices. Figure 10c demonstrates the function of in situ temperature data collection in realized virtual scenarios, where the users can touch objects with different temperatures, such as a cold beer bottle, chilly soft drink bottle, and mug of warm green tea or hot coffee.…”

Section: Applications Of Wearable Vr/ar Systemmentioning

confidence: 99%

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Textile Electronics for VR/AR Applications

Liu

Bao

et al. 2020

Adv Funct Materials

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Textile electronics addresses fibers or fiber assemblies with electronic functions to generate, transmit, modulate, and detect electrons. Interactive textile electronic devices may provide suitable platforms for virtual reality (VR)/augmented reality (AR) applications because of their excellent performance and unique immersive features such as lightweight, handiness, flexibility, comfort, and low strain even under high deformations. This paper presents a systematic review of the literature on the state‐of‐the‐art of interactive devices, fabrication technologies, system integration, promising applications, and challenges involved in textile‐based VR/AR systems.

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Section: Textile Electronic Devices For Vr/armentioning

confidence: 99%

Section: Textile Electronic Devices For Vr/armentioning

confidence: 99%

Section: Applications Of Wearable Vr/ar Systemmentioning

confidence: 99%

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Textile Electronics for VR/AR Applications

Liu

Bao

et al. 2020

Adv Funct Materials

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“…[ 21,23 ] It was only recently that researchers began to look into designing stretchable TE devices as the ultimate device structure for wearable THDs. [ 79–81 ] For example, Figure 3c shows a stretchable TE device produced by our group, which interconnects alternating p‐ and t‐type TE dices using Cu serpentine electrodes to replicate thermal sensations in the VR/AR space. We discuss the relevant details on the thermal VR/AR applications of this device in a later section.…”

Section: Thermo‐haptic Operation Using Electric Inputmentioning

confidence: 99%

“…The third term represents Joule heating, and its sign convention varies according to the cooling/heating mode. [ 79 ] The second and third terms cause problems in the TE devices in the cooling mode. Note that the electrical current is squared and the sign convention in both the cooling and heating modes is opposite in the Joule heating terms.…”

Section: Thermo‐haptic Operation Using Electric Inputmentioning

confidence: 99%

Thermo‐Haptic Materials and Devices for Wearable Virtual and Augmented Reality

Lee

Kim

Sul

et al. 2020

Adv Funct Materials

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The current generation of virtual and augmented realities (VR/AR) has substantially advanced in the past decade because of the rapid development of converging technologies in various engineering and scientific fields. However, the current VR/AR technologies rely mainly on visual and auditory senses to physically replicate the virtual environment, although tactile senses play a significant role in the daily life since a myriad of tactile information is received through physical touch. Of the tactile senses, thermal senses are of great importance to be reproduced in the VR/AR field, since heat is transferred constantly and further interact with the surrounding environment. To date, there has been a huge amount of research studies on functional materials, thermo‐haptic devices, and wearable electronics that have all converged to form the fundamental groundwork for the development of wearable thermal VR/AR devices. In this progress report, a review on various physical mechanisms and research is provided that can potentially be applied in the next generation of thermal VR/AR technologies and discuss the essential challenges that need to be addressed.

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Eco‐Friendly and Particle‐Free Copper Ionic Aqueous Precursor for In Situ Low Temperature Photothermal Synthesizing and Patterning of Highly Conductive Copper Microstructures on Flexible Substrate

2021

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Liquid precursor‐based laser‐induced reductive patterning techniques enable fast and economical fabrication of flexible electronics. Herein, an eco‐friendly and particle‐free copper ionic solution for laser‐induced reductive patterning of copper microlines on a low glass transition temperature and transparent flexible substrate is successfully developed. The solvent used is water and the reducing agent is l‐ascorbic acid. A continuous wave 640 nm laser is used as the heat source to initiate the reductive reaction and to deposit copper microlines on the substrate surface. The resistivity of the copper microlines fabricated with optimized laser parameters is remarkably low at 4.7 μΩ cm. To further improve the electrical conductivity and to enhance mechanical durability, the fabricated microlines are annealed using the same laser after the copper ionic liquid precursor is removed. The microstructures and mechanical robustness of the copper microlines, as well as the adhesion between the copper microlines and the substrate, are investigated by cyclic bending test, pull‐off test and scanning electron microscope analyses. Up to 39% reduction of electrical resistance and up to 77% enhancement of mechanical durability after a 1000 cycle bending test can be achieved by laser postprocessing.

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Artificial Thermal Sensation: Stretchable Skin‐Like Cooling/Heating Device for Reconstruction of Artificial Thermal Sensation in Virtual Reality (Adv. Funct. Mater. 29/2020)

Cited by 7 publications

References 0 publications

Textile Electronics for VR/AR Applications

Textile Electronics for VR/AR Applications

Thermo‐Haptic Materials and Devices for Wearable Virtual and Augmented Reality

Eco‐Friendly and Particle‐Free Copper Ionic Aqueous Precursor for In Situ Low Temperature Photothermal Synthesizing and Patterning of Highly Conductive Copper Microstructures on Flexible Substrate

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