# US 11,909,431 B2 · Capsule-type endoscope capable of two-way communication

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- Number: US 11,909,431 B2
- Document ID: US11909431B2
- Status: Granted
- Kind: B2
- Application number: 17/117,956
- Filed: 2020-12-10
- Published: 2021-06-17
- Granted: 2024-02-20
- Earliest claimed: 2019-12-11
- Assignees: Industry-Academic Cooperation Foundation, Chosun University
- Applicants: Industry-Academic Cooperation Foundation, Chosun University
- Inventors: Youn Tae Kim; Jong Jin Baek; Ji Won Park; Min Gu Kang
- Web page: https://patentgrep.com/patent/US11909431B2

## CPC

- H04B 1/1638: {Special circuits to enhance selectivity of receivers not otherwise provided for (resonant circuits H03H)}
- A61B 1/00016: {using wireless means}
- A61B 1/041: {Capsule endoscopes for imaging}
- A61B 5/073: {Intestinal transmitters}
- A61B 90/98: using electromagnetic means, e.g. transponders
- H04B 1/1607: {Supply circuits (converters H02M; filters therefor H02M1/14; voltage stabilisers G05F1/46)}
- H04B 13/005: {Transmission systems in which the medium consists of the human body}
- H04B: TRANSMISSION
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A capsule-type endoscope capable of two-way communication includes an RFID receiving antenna receiving an RFID signal, a first matching circuit for impedance matching with the RFID receiving antenna, a human body communication electrode comprised of a ground electrode and a signal electrode transmitting a signal for human body communication, and a second matching circuit for impedance matching with the human body communication electrode.

## Claims

### Claim 1

A capsule-type endoscope capable of two-way communication, comprising:
an RFID receiving antenna receiving an RFID signal;
a first matching circuit for impedance matching with the RFID receiving antenna;
a human body communication electrode comprised of a ground electrode and a signal electrode transmitting a signal for human body communication;
a second matching circuit for impedance matching with the human body communication electrode;
a first switch for opening and closing a connection between the RFID receiving antenna and the first matching circuit; and
a second switch opening and closing a connection between the signal electrode of the human body communication electrode and the second matching circuit;
wherein the first switch connects the RFID receiving antenna and the first matching circuit when the RFID signal is received, and opens a connection between the signal electrode of the human body communication electrodes and the second matching circuit when the human body communication signal is transmitted, and
the second switch connects the signal electrode of the human body communication electrode and the second matching circuit when the human body communication signal is transmitted, and opens a connection between the RFID receiving antenna and the first matching circuit when the RFID signal is received.

### Claim 2 (depends on 1)

The capsule-type endoscope capable of two-way communication of claim 1, wherein the RFID receiving antenna and the signal electrode are provided as a single integrated electrode, and
the capsule-type endoscope further comprises:
a third switch selectively connecting the integrated electrode to one of the first matching circuit and the second matching circuit; and
a fourth switch opening and closing a connection between the ground electrode and the second matching circuit.

### Claim 3 (depends on 1)

The capsule-type endoscope capable of two-way communication of claim 1, wherein the RFID receiving antenna is formed of a material having conductivity, outside or inside of the capsule-type endoscope.

### Claim 4 (depends on 1)

The capsule-type endoscope capable of two-way communication of claim 1, wherein the RFID receiving antenna has a rounded, elliptical, quadrangular loop antenna, meander line antenna, or helical structure.

### Claim 5

A capsule-type endoscope capable of two-way communication, comprising:
an RFID receiving antenna receiving an RFID signal;
a first matching circuit for impedance matching with the RFID receiving antenna;
a human body communication electrode comprised of a ground electrode and a signal electrode transmitting a signal for human body communication;
a second matching circuit for impedance matching with the human body communication electrode,
wherein the RFID receiving antenna and the signal electrode are provided as a single integrated electrode, and
the capsule-type endoscope further comprises:
a third switch selectively connecting the integrated electrode to one of the first matching circuit and the second matching circuit; and
a fourth switch opening and closing a connection between the ground electrode and the second matching circuit,
wherein when the RFID signal is received, the third switch connects the integrated electrode to the first matching circuit, and the fourth switch opens the connection between the ground electrode and the second matching circuit; and
when the human body communication signal is transmitted, the third switch connects the integrated electrode to the second matching circuit, and the fourth switch connects the ground electrode and the second matching circuit.