Toward an active contact lens: Integration of a wireless power harvesting IC

Pandey, Jagdish; Liao, Yu-Te; Lingley, Andrew; Parviz, Babak A.; Otis, Brian

doi:10.1109/biocas.2009.5372069

Cited by 13 publications

(7 citation statements)

References 6 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By integrating computational capabilities, these devices are able to provide useful features to the end user. According to their applications and sensors, wearable devices can be found in different form factors, including but not limited to: armband (Jalaliniya & Pederson, 2012), anklet (Troshynski, Lee & Dourish, 2008), bracelet (Cheng, Griss, Davis, Li & You, 2013), contact lenses (Pandey, Liao, Lingley, Parviz, & Otis, 2009), necklace (pendant) (Gamboa, Silva & Silva, 2010), glasses (Kim, Yang, & Kim, 2012), gloves (Perng, Fisher, Hollar, Pister & Hall, 1999), jacket (Keng, Teh & Cheok, 2008), ring (Werner & Hornecker, 2008), shirt (Knight et al, 2004), shoes (Spelmezan, 2012) and watches (Atallah, Lo, King & Yang, 2010).…”

Section: State-of-the-artmentioning

confidence: 99%

See 1 more Smart Citation

Human Factors Considerations in the Design of Wearable Devices

Motti

Caine

2014

Proceedings of the Human Factors and Ergonomics Society Annual

136

View full text Add to dashboard Cite

Wearable devices have great potential to support several application domains ranging from medical and safety critical, to leisure and entertainment. Wearable devices' solutions are promising, and extensive research has been conducted in this domain since the early 90's. However most of these works focuses on the feasibility of individual solutions. As such, the human aspects are often neglected, which can decrease not only the acceptance levels for novel devices, but also their sustained engagement. To facilitate the consideration of human factors in the early design stage, we present and define a list of 20 human-centered design principles. We explain how each principle can be incorporated during the design phase of the wearable device creation process. By adopting these principles, we expect practitioners to achieve better wearable solutions, improving the user acceptance, satisfaction and engagement for novel applications.

show abstract

Section: State-of-the-artmentioning

confidence: 99%

“…The research efforts that have been done in the past decades in this field are extensive, but also constrained, since advances remain in individual fields (Cho, 2010) and most of them focuses on testing the feasibility of individual applications (Pandey, Liao, Lingley, Parviz, & Otis, 2009), (Li et al, 2010), (Cannan & Hu, 2011).…”

Section: State-of-the-artmentioning

confidence: 99%

Human Factors Considerations in the Design of Wearable Devices

Motti

Caine

2014

Proceedings of the Human Factors and Ergonomics Society Annual

136

View full text Add to dashboard Cite

show abstract

“…Unlike conventional wearable devices, electronic contact lenses can make use of both physical and chemical sensors for a variety of applications. For example, physical sensors can detect glaucoma via pressure sensing [30][31][32], whereas chemical sensors can detect Diabetes by sensing changes in glucose concentration. Additionally, continuous measurements are of vital importance that in the cases of diabetes and glaucoma, the effects of continuous monitoring have been observed and modelled, indicating that improved management of these conditions significantly reduces the need for hospital treatment.…”

Section: Introductionmentioning

confidence: 99%

Wireless Communication and Power Harvesting in Wearable Contact Lens Sensors

et al. 2021

View full text Add to dashboard Cite

The human eye contains multiple biomarkers related to various diseases, making electronic contact lens an ideal non-invasive platform for their diagnosis and treatment. Recent advances in technology have enabled the monitoring and diagnosis of glaucoma from Intraocular Pressure (IOP) detection, diabetes from glucose concentration detections, and other biosensors for pH and temperature sensing. Different sensor designs have led to distinct power transfer techniques, among which inductively coupled power transfer is considered most favourable for electronic contact lenses power delivery applications. Therefore, loop antenna, spiral shape antenna, and antenna with nanomaterials such as graphene and hybrid silver nanofibers have been explored under Industrial, Scientific, and Medical (ISM) frequency bands for both Wireless Power Transfer (WPT) and data communication. Notably, spiral antennas are also considered as the component of IOP sensing using capacitive sensors to detect the changes in frequency caused by pressure. This article reviews the stateof-the-art technologies in electronic contact lens sensors and their power delivery techniques. Herein, diverse sensing methods, materials, and power transfer techniques and the promising future trends and challenges in electronic contact lenses have been presented.

show abstract

“…The power consumption of wearable medical devices such as hearing aid and glucose monitor is desired to be minimized for a user to use them as long as possible without charging or changing battery . If the battery of a wearable medical device can be charged without wire connection, the user convenience can be further improved.…”

Section: Introductionmentioning

confidence: 99%

Wireless power charger for wearable medical devices with in‐band communication

Moon

Park

Jeong

et al. 2015

Circuit Theory & Apps

View full text Add to dashboard Cite

SUMMARYA wireless power charger integrated circuit has been developed for wearable medical devices in a 0.18-μm Bipolar, Complementary metal-oxide-semiconductor, and Lightly-Doped Metal-Oxide-Semiconductor (BCDMOS) process. A passive full-wave rectifier consisting of Schottky diodes and cross-coupled n-type Metal-Oxide-Semiconductor (nMOS) transistors performs the alternating current to direct current power conversion without any reverse leakage current. To charge a battery, a linear charger circuit follows the passive rectifier instead of a switching charger circuit for the small form factor of wearable medical devices. An in-band communication circuit notifies the proper connection of the wireless power receiver and the battery charging status to the charging pad (wireless power transmitter) through the wireless power transmission channel. The wireless power charger integrated circuit occupies 1.44-mm 2 silicon area and shows 31.7% power efficiency when the charging current is 26.6 mA.

show abstract

Toward an active contact lens: Integration of a wireless power harvesting IC

Cited by 13 publications

References 6 publications

Human Factors Considerations in the Design of Wearable Devices

Human Factors Considerations in the Design of Wearable Devices

Wireless Communication and Power Harvesting in Wearable Contact Lens Sensors

Wireless power charger for wearable medical devices with in‐band communication

Contact Info

Product

Resources

About