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公开(公告)号：US11478137B2
公开(公告)日：2022-10-25
申请号：US16842497
申请日：2020-04-07
Inventor： Kwang Il Oh , Tae Wook Kang , Sung Eun Kim , Hyuk Kim , Mi Jeong Park , Hyung-Il Park , Kyung Jin Byun , Jae-Jin Lee , In Gi Lim
Abstract: A capsule endoscope image receiver includes a receiving electrode unit that receives first and second differential signals from a capsule endoscope image transmitter through a human body communication channel, an analog amplifying unit that receives the first and second differential signals and outputs first and second amplified differential signals, and a signal restoring unit that receives the first and second amplified differential signals and restores image information. The analog amplifying unit includes a first amplifier that outputs the first amplified differential signal, a second amplifier that outputs the second amplified differential signal, and an input impedance that is connected between a first inverting input terminal of the first amplifier and a second inverting input terminal of the second amplifier and obtains a gain of differential signal amplification in which a high frequency component of the first and second amplified differential signals is greater than a low frequency component.
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公开(公告)号：US11424775B2
公开(公告)日：2022-08-23
申请号：US17237848
申请日：2021-04-22
Inventor： Kwang Il Oh , Tae Wook Kang , Sung Eun Kim , Hyuk Kim , Hyung-Il Park , Kyung Jin Byun , Jae-Jin Lee , In Gi Lim
Abstract: Disclosed are a human body communication receiver and an operating method thereof, which may effectively remove low frequency noise. The human body communication receiver according to the present disclosure includes a receiving electrode, a virtual electrode, a filter circuit that is connected between the receiving electrode and the virtual electrode, and removes low frequency noise from a signal received through the receiving electrode to generate a high frequency signal, a low frequency reconstruction circuit that is connected to a rear end of the filter circuit and reconstructs a low frequency baseband signal by rectifying the high frequency signal, and an amplifying circuit that is connected to a rear end of the low frequency reconstruction circuit, and amplifies the low frequency baseband signal.
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公开(公告)号：US11298009B2
公开(公告)日：2022-04-12
申请号：US16402164
申请日：2019-05-02
Inventor： Mi Jeong Park , Hyung-Il Park , Tae Wook Kang , Sung Eun Kim , Hyuk Kim , Kwang Il Oh , Jae-Jin Lee , In Gi Lim
Abstract: Provided is and electrode selection device communicating with a capsule endoscope. The device includes an analog front end configured to recover first data based on first signals transmitted from the capsule endoscope to a first electrode and a second electrode, recover second data based on second signals transmitted from the capsule endoscope to the first electrode and a third electrode, and recover third data based on third signals transmitted from the capsule endoscope to the second electrode and the third electrode, and a digital receiver configured to calculate a first correlation value between the first and second electrodes, a second correlation value between the first and third electrodes, and a third correlation value between the second and third electrodes based on the first to third data. The digital receiver calculates first to third correlation sums, and selects a receiving electrode pair based on the first to third correlation sums.
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公开(公告)号：US10659172B2
公开(公告)日：2020-05-19
申请号：US15616788
申请日：2017-06-07
Inventor： In Gi Lim , Hyung-Il Park , Sung Weon Kang , Tae Wook Kang , Sung Eun Kim , Jung Bum Kim , Mi Jeong Park , Seong Mo Park , Kwang Il Oh , Byounggun Choi
IPC: A61B1/00 , A61B1/04 , H04B13/00 , H04J13/00 , H04J13/10 , H04J3/06 , H04J3/16 , H04L5/00 , H04L7/04 , H04N5/225
Abstract: The present disclosure relates to a capsule endoscope transmitter configured to transmit frames including control frames and data frames to a capsule endoscope receiver. The capsule endoscope transmitter includes a preamble generator configured to generate preambles for synchronizing and identifying the control frames used to select a reception electrode pair that receives the frames, and a line sync generator configured to generate a line sync for synchronizing the data frames and identifying a code value of each of the data frames.
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公开(公告)号：US10033491B2
公开(公告)日：2018-07-24
申请号：US15349214
申请日：2016-11-11
Inventor： Tae Wook Kang , Sung Weon Kang , Hyung-Il Park , Sung Eun Kim , Jung Bum Kim , Kyung Hwan Park , Kwang Il Oh , In Gi Lim , Byounggun Choi
Abstract: Provided is a method for generating a preamble of a transmission signal for human body communication, the method including using a frequency shift code (FSC) of which a length is adjusted according to an operating clock frequency or a transmission rate and a first pseudo random binary sequence (PRBS) code of p chips where p is a natural number to generate a first preamble unit block of n chips where n is a natural number, using the FSC and a second PRBS code of p′ chips to generate a second preamble unit block of n′ chips, and arraying the first preamble unit block consecutively and repeatedly and disposing the second preamble unit block at a next stage to form the preamble of the transmission signal.
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Patent Agency Ranking
公开(公告)号：US12225464B2
公开(公告)日：2025-02-11
申请号：US17552766
申请日：2021-12-16
Inventor： Hyuk Kim , Hyung-Il Park , Tae Wook Kang , Sung Eun Kim , Mi Jeong Park , Kyung Jin Byun , Kwang Il Oh , Sukho Lee , Jae-Jin Lee , In Gi Lim , Kyuseung Han
Abstract: Disclosed is an operating method of a user communication device, which includes receiving a wakeup signal from a stationary communication device over a first human body communication channel, the wakeup signal having a frequency in a low frequency band, switching from a standby mode to a wakeup mode in response to the wakeup signal, and receiving a data signal from the stationary communication device over the first human body communication channel during the wakeup mode, and the first human body communication channel is provided by a body of a user of the user communication device.
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公开(公告)号：US11642026B2
公开(公告)日：2023-05-09
申请号：US16794718
申请日：2020-02-19
Inventor： Sung Eun Kim , Kwang Il Oh , Tae Wook Kang , Hyuk Kim , Mi Jeong Park , Hyung-Il Park , Kyung Jin Byun , Jae-Jin Lee , In Gi Lim
CPC classification number: A61B5/0028 , A61B5/117 , A61B5/683 , G06F3/03 , G06F3/044 , A61B2560/0209
Abstract: The human body sensing device includes a contact sensing unit that includes a sensing electrode and a signal electrode, an activation module that senses a contact with a body through the sensing electrode when the sensing electrode and the signal electrode contact the body and outputs a wake-up signal in response to the sensing of the contact, and a human body communication unit that provides a ground voltage to the signal electrode and outputs a data signal to the signal electrode when the wake-up signal from the activation module is received.
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公开(公告)号：US11607120B2
公开(公告)日：2023-03-21
申请号：US16378472
申请日：2019-04-08
Inventor： Kwang Il Oh , Hyung-Il Park , Tae Wook Kang , Sung Eun Kim , Mi Jeong Park , Jae-Jin Lee , In Gi Lim
Abstract: Provided are a capsule endoscopic receiving device, a capsule endoscope system including the same, and an operating method of the capsule endoscopic receiving device, the capsule endoscopic receiving device including an analog front end configured to receive a preamble from one receiving electrode pair from among a plurality of receiving electrodes, a valid signal detection circuit configured to compare a reference voltage with input data generated on a basis of a voltage level of the preamble, and a preamble processor configured to select a final electrode pair configured to receive the image data on a basis of a correlation value of the preamble and a comparison result of the input data and the reference voltage. According to the inventive concept, stability of receiving image data may be secured by selecting an optimal receiving electrode pair.
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公开(公告)号：US11509403B2
公开(公告)日：2022-11-22
申请号：US16816109
申请日：2020-03-11
Inventor： Tae Wook Kang , Sung Eun Kim , Kwang Il Oh , Hyuk Kim , Mi Jeong Park , Hyung-Il Park , Kyung Jin Byun , Jae-Jin Lee , In Gi Lim
Abstract: Provided are a human body communication device and an operating method of the same. The human body communication device according to an embodiment of the inventive concept includes a first electrode, a second electrode, a transmitting circuit, a receiving circuit, a ground electrode, and a switch. The transmitting circuit generates a first signal in a transmitting mode and transmits the first signal to the first electrode. The receiving circuit receives a second signal from the first electrode in the receiving mode. The receiving circuit includes a differential amplifier that amplifies a difference between a voltage level of a first input terminal depending on the second signal and a voltage level of a second input terminal. The switch electrically connects the second electrode and the ground electrode in the transmitting mode, and electrically connects the second electrode and the second input terminal in the receiving mode.
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公开(公告)号：US11418267B2
公开(公告)日：2022-08-16
申请号：US16784151
申请日：2020-02-06
Inventor： Kwang Il Oh , Sung Eun Kim , Tae Wook Kang , Hyuk Kim , Mi Jeong Park , Hyung-Il Park , Kyung Jin Byun , Jae-Jin Lee , In Gi Lim
Abstract: Provided is a receiver. The receiver according to the inventive concept includes a first filter circuit, a second filter circuit, and an amplifier. The first filter circuit provides a first path for first frequency components below first cutoff frequency of input frequency components and passes second frequency components except for the first frequency components of the input frequency components through second path. The second filter circuit attenuates third frequency components below a second cutoff frequency of the second frequency components. The amplifier amplifies the second frequency components including the attenuated third frequency components.
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