A Fully Integrated RF-Powered Contact Lens With a Single Element Display

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

doi:10.1109/tbcas.2010.2081989

Cited by 88 publications

(80 citation statements)

References 13 publications

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“…[ 9,10 ] These systems are suitable for applications including environmentally friendly sensors, [ 11,12 ] wearable medical devices, [ 13,14 ] and temporary biomedical implants. [ 15,16 ] For example, contact lenses can be impregnated with electronics to improve visual acuity [ 17,18 ] or measure glucose levels in real time. [ 19 ] Dissolvable and elastomeric substrates allow conformal coating of sensor arrays with curvilinear organs such as the skin, eye, heart, and brain.…”

Section: Doi: 101002/adma201500954mentioning

confidence: 99%

Transfer Printing of Metallic Microstructures on Adhesion‐Promoting Hydrogel Substrates

Sariola

Zhu

et al. 2015

Advanced Materials

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Section: Doi: 101002/adma201500954mentioning

confidence: 99%

Transfer Printing of Metallic Microstructures on Adhesion‐Promoting Hydrogel Substrates

Sariola

Zhu

et al. 2015

Advanced Materials

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“…Two capacitive banks which are controlled by a digital block are also added to LC tank for tuning the oscillation frequency to the operation frequency band (868 MHz). The total estimated radiation efficiency of this antenna is 3% in free space [41]. Therefore, the estimated radiated power from the implant in free space is dBm according to the simulated AC power dissipation of 30 W in the LC tank.…”

Section: Electronics Of Data Communicationmentioning

confidence: 99%

A Remotely Powered Implantable Biomedical System With Location Detector

Kilinc

Ghanad

Maloberti

et al. 2015

IEEE Trans. Biomed. Circuits Syst.

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Abstract-An universal remote powering and communication system is presented for the implantable medical devices. The system be interfaced with different sensors or actuators. A mobile external unit controls the operation of the implantable chip and reads the sensor's data. A locator system is proposed to align the mobile unit with the implant unit for the efficient magnetic power transfer. The location of the implant is detected with 6 mm resolution from the rectified voltage level at the implanted side. The rectified voltage level is fedback to the mobile unit to adjust the magnetic field strength and maximize the efficiency of the remote powering system. The sensor's data are transmitted by using a free running oscillator modulated with on-off key scheme. To tolerate large data carrier drifts, a custom designed receiver is implemented for the mobile unit. The circuits have been fabricated in 0.18 um CMOS technology. The remote powering link is optimized to deliver power at 13.56 MHz. On chip voltage regulator creates 1.8 V from a 0.9 V reference voltage to supply the sensor/actuator blocks. The implantable chip dissipates 595 W and requires 1.48 V for start up.Index Terms-CMOS analog circuit design, data communication, implantable biomedical system, implantable medical device, inductive link, integrated circuits, location detection, locator, power management, remote powering, wireless power transfer.

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“…Aside from power management, focusing issues and biocompatibility requirements, the main question arises, however, which display technology would be best suited for integration into a contact lens. A considerable amount of research has been performed by the group of B. Parviz into the integration and powering of micro-LEDs into a contact lens [1][2]. Although a single-pixel wireless contact lens display has been demonstrated, the emissive nature of the technology might hamper the development of a high resolution display due to its considerable power consumption.…”

Section: Background and Objectivesmentioning

confidence: 99%