Li Chu Sun

20220407366, Dec 22, 2022

Jun 21, 2021

17/353768

- Plano TX, US
Li Sun - Plano TX, US
Luis Ortiz Hernandez - Dallas TX, US

H02J 50/80
H02J 7/02
H02J 7/00
H02J 50/10
A61N 1/378

A method of operation of a wireless charger device includes transmitting a wireless charging signal to a receiver device. The method further includes receiving a clamping pulse from the receiver device based on the wireless charging signal. The clamping pulse indicates a first value associated with a falling edge of the clamping pulse and further indicates a second value associated with a rising edge of the clamping pulse. The clamping pulse is detected based on a comparison of a first threshold with the first value and further based on a comparison of a second threshold with the second value, and the second threshold is different than the first threshold. The method further includes determining a charging state of the receiver device based on the clamping pulse.

20220320890, Oct 6, 2022

Aug 24, 2021

17/410796

- Plano TX, US
Li Sun - Plano TX, US
Luis Ortiz-Hernandez - Plano TX, US

H02J 7/00
H02J 50/12
H02J 50/20
A61N 1/378

An implantable medical device (IMD) is configured to provide stimulation therapy to a patient. The IMD includes a rechargeable battery, pulse generating circuitry powered by the rechargeable battery and an inductive coupling element including at least one inductor operative to accept radio frequency (RF) power from an external charger and generate a charging voltage. A temperature sensor is configured to measure a temperature of at least a part of the IMD and output measured temperature data. A waveform generating circuit for converting measured temperature data to a waveform signal for controlling a recharging current for the rechargeable battery. The inductive coupling element is configured to communicate the waveform signal to the external charger.

20220226659, Jul 21, 2022

Aug 25, 2021

17/411930

- Plano TX, US
Li Sun - Plano TX, US
Luis Ortiz-Hernandez - Plano TX, US

A61N 1/378
A61N 1/372
H02J 50/80
H02J 50/10
H02J 50/20
H02J 7/00

An implantable medical device (IMD) includes a rechargeable battery, pulse generating circuitry, an inductive coupling element including at least one inductor operative to accept radio frequency (RF) power from an external charger and generate a charging current. A recharging circuit generates a recharge current for recharging the rechargeable battery, the recharge current being based on the charging current generated from the inductive coupling element. The recharging circuitry is operable to detect a recharging level of the rechargeable battery. A temperature sensor is configured to measure a temperature of at least a part of the IMD and output measured temperature data. A control circuit controls the charging current received at the recharging circuitry to limit the charging current based upon the recharging level and to limit the charging current for a period of time based upon the measured temperature data to communicate a temperature level to the external charger.

20220203104, Jun 30, 2022

Feb 8, 2021

17/170473

- Plano TX, US
Li Sun - Plano TX, US
Nicholas Sachs - Plano TX, US

A61N 1/378
A61N 1/372

A wireless charger device is configured to charge an implantable medical device (IMD). A patient controller obtains one or more power parameters from the charger device during charging of the IMD. The patient controller estimates a temperature range of the IMD using the one or more power parameters from the charger device and compares to a heating threshold. The patient controller then determines whether one or more spacers are recommended in response to the comparison. The one or more spacers are removably attached to the wireless charger device and are configured to lay in a position between the wireless charger device and a patient's skin to increase a charging path.