Actuating compact wearable augmented reality devices by multifunctional artificial muscle

Kim, Dong-Jin; Kim, Baekgyeom; Shin, Beomju; Shin, Dongwook; Lee, Chang‐Kun; Chung, Jae‐Seung; Seo, Juwon; Kim, Yun-Tae; Sung, Geeyoung; Seo, Wontaek; Kim, Sunil; Hong, Sung-Hoon; Hwang, Seongtaek; Han, Seungyong; Kang, Daeshik; Lee, Hong-Seok; Koh, Je‐Sung

doi:10.1038/s41467-022-31893-1

Cited by 29 publications

(17 citation statements)

References 54 publications

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“…The cooling rate of the SMA is determined by thermal diffusion and convection. Many studies have been reported to reduce cooling time using water, fans, and lower diameter SMA [22][23][24] . We attempted to find the optimal fabrics integrated with SMA to reduce cooling time and adopted a small diameter (0.006 mil) to enable assisted walking (Fig.…”

Section: Methodsmentioning

confidence: 99%

Development of a comfort suit-type soft-wearable robot with flexible artificial muscles for walking assistance

Piao

Kim

et al. 2023

Sci Rep

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Anchoring components are added to wearable robots to ensure a stable interaction between the suits and the human body and to minimize the displacement of the suits. However, these components can apply pressure to the body and can cause user dissatisfaction, which can decrease willingness to use the suits. Therefore, this study aims to develop a suit-type soft-wearable robot platform for walking assistance by providing comfortable garment pressure to ensure user satisfaction. The first prototype of a wearable robot suit was developed with anchoring components on the shoulders, waist, and thighs based on previous research results. Wear tests were conducted to measure garment pressure depending on posture using pressure sensors, and satisfaction surveys were conducted. The second prototype design was then developed, and performance tests with flexible artificial muscles and a satisfaction survey were conducted. Regarding the first prototype, the participants felt more than normal pressure in the shoulders and relatively less pressure in the thighs and calves. Thus, compared to the first design, the second design ensured a decreased garment pressure and resulted in an improvement of overall user satisfaction. These results can help provide guidance in the development of wearable robots by taking pressure comfort and user satisfaction into consideration.

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Section: Methodsmentioning

confidence: 99%

Development of a comfort suit-type soft-wearable robot with flexible artificial muscles for walking assistance

Piao

Kim

et al. 2023

Sci Rep

Self Cite

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Section: Metaverse Wearables Coupled With Xr Technologymentioning

confidence: 99%

Metaverse Wearables for Immersive Digital Healthcare: A Review

Kim,

Yang,

Lee

et al. 2023

Advanced Science

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The recent exponential growth of metaverse technology has been instrumental in reshaping a myriad of sectors, not least digital healthcare. This comprehensive review critically examines the landscape and future applications of metaverse wearables toward immersive digital healthcare. The key technologies and advancements that have spearheaded the metamorphosis of metaverse wearables are categorized, encapsulating all‐encompassed extended reality, such as virtual reality, augmented reality, mixed reality, and other haptic feedback systems. Moreover, the fundamentals of their deployment in assistive healthcare (especially for rehabilitation), medical and nursing education, and remote patient management and treatment are investigated. The potential benefits of integrating metaverse wearables into healthcare paradigms are multifold, encompassing improved patient prognosis, enhanced accessibility to high‐quality care, and high standards of practitioner instruction. Nevertheless, these technologies are not without their inherent challenges and untapped opportunities, which span privacy protection, data safeguarding, and innovation in artificial intelligence. In summary, future research trajectories and potential advancements to circumvent these hurdles are also discussed, further augmenting the incorporation of metaverse wearables within healthcare infrastructures in the post‐pandemic era.

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“…1(c)], as a more popular conventional optics solution, uses a pair of halfmirror and aspheric partially reflective lens as the combiner. 18,19 Such design effectively folds the optical path to improve system compactness, and simultaneously, offers a high degree of design freedom for realizing a broad FOV (>50 deg). Freeform surface (FFS) prisms are most widely employed in freeform optics solutions, where the systems consist of two major parts: (i) an FFS prism that projects collimated virtual images from the microdisplay module onto the eye and (ii) an FFS compensator cemented on the back of the FFS prism to correct the ambient view distortion caused by the FFS prism [Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The birdbath configuration [Fig. 1(c)], as a more popular conventional optics solution, uses a pair of half-mirror and aspheric partially reflective lens as the combiner 18 , 19 . Such design effectively folds the optical path to improve system compactness, and simultaneously, offers a high degree of design freedom for realizing a broad FOV (>50 deg).…”

Section: Introductionmentioning

confidence: 99%

Metasurface-enabled augmented reality display: a review

et al. 2023

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.Augmented reality (AR) display, which superimposes virtual images on ambient scene, can visually blend the physical world and the digital world and thus opens a new vista for human–machine interaction. AR display is considered as one of the next-generation display technologies and has been drawing huge attention from both academia and industry. Current AR display systems operate based on a combination of various refractive, reflective, and diffractive optical elements, such as lenses, prisms, mirrors, and gratings. Constrained by the underlying physical mechanisms, these conventional elements only provide limited light-field modulation capability and suffer from issues such as bulky volume and considerable dispersion, resulting in large size, severe chromatic aberration, and narrow field of view of the composed AR display system. Recent years have witnessed the emerging of a new type of optical elements—metasurfaces, which are planar arrays of subwavelength electromagnetic structures that feature an ultracompact footprint and flexible light-field modulation capability, and are widely believed to be an enabling tool for overcoming the limitations faced by current AR displays. Here, we aim to provide a comprehensive review on the recent development of metasurface-enabled AR display technology. We first familiarize readers with the fundamentals of AR display, covering its basic working principle, existing conventional-optics-based solutions, as well as the associated pros and cons. We then introduce the concept of optical metasurfaces, emphasizing typical operating mechanisms, and representative phase modulation methods. We elaborate on three kinds of metasurface devices, namely, metalenses, metacouplers, and metaholograms, which have empowered different forms of AR displays. Their physical principles, device designs, and the performance improvement of the associated AR displays are explained in details. In the end, we discuss the existing challenges of metasurface optics for AR display applications and provide our perspective on future research endeavors.

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Actuating compact wearable augmented reality devices by multifunctional artificial muscle

Cited by 29 publications

References 54 publications

Development of a comfort suit-type soft-wearable robot with flexible artificial muscles for walking assistance

Development of a comfort suit-type soft-wearable robot with flexible artificial muscles for walking assistance

Metaverse Wearables for Immersive Digital Healthcare: A Review

Metasurface-enabled augmented reality display: a review

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