IP Library › Granted Patent US 12,355,264
Granted Patent B2
US 12,355,264 · App. 18/774,599 · Granted Jul 8, 2025

Contactless power reception device and reception method

Inventors: Chun-Kil Jung (Seoul, KR); Hak Do Kim (Suwon-si, KR); Sang Youn Noh (Suwon-si, KR)
Assignee: GE Hybrid Technologies, LLC
H02J50/12H02J7/00034H02J50/40H02J50/80H04W24/08
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Quick Facts
Patent No.
US 12,355,264
App. No.
18/774,599
Granted
Jul 8, 2025
Kind
B2
Abstract

A wireless power reception device and a wireless communication method thereby are provided. The wireless communication method by the wireless power reception device may comprise the steps of: receiving a wireless power signal from a wireless power transmission device; measuring the strength of the wireless power signal; modulating the amplitude of the wireless power signal according to the measured strength of the wireless power signal; and performing communication with the wireless power transmission device by using the signal having the amplitude modulated.

Claims (32)

1. A wireless power reception device comprising:

at least one secondary coil to receive a wireless power signal transmitted from a wireless power transmission device;

a rectifier configured to rectify the wireless power signal to a direct current (DC) power;

a series capacitor coupled to the at least one secondary coil;

a modulator coupled to the secondary coil and the rectifier to modulate an amplitude of the wireless power signal, wherein the modulator includes

a first resistor connected in series with a first switch, and connected to a first terminal, and

a second resistor connected in series with a second switch and connected to a second terminal; and

a controller configured to communicate with the wireless power transmission device using the modulator.

2. The wireless power reception device of claim 1 , wherein the first terminal comprises a terminal of the series capacitor.

3. The wireless power reception device of claim 1 , wherein the second terminal comprises a terminal of the at least one secondary coil.

4. The wireless power reception device of claim 1 , wherein the modulator is coupled between the at least one secondary coil and the rectifier.

5. The wireless power reception device of claim 1 , wherein at least one of the first switch and the second switch is a transistor.

6. The wireless power reception device of claim 5 , wherein the transistor is any one of a metal oxide silicon field effect transistor (MOSFET) and a bipolar junction transistor (BJT).

7. The wireless power reception device of claim 1 , wherein the first switch is connected in series with the second switch.

8. The wireless power reception device of claim 1 , further comprising a detection circuit configured to measure a strength of the wireless power signal by monitoring an output of the rectifier, wherein the controller communicates the strength of the wireless power signal using the modulator.

9. The wireless power reception device of claim 1 , wherein the modulator is coupled to a direct current (DC) terminal of the wireless power reception device.

10. The wireless power reception device of claim 1 , wherein the modulator is coupled to an alternating current (AC) terminal of the wireless power reception device.

11. The wireless power reception device of claim 1 , wherein the modulator includes two or more transistors and two or more resistors.

12. A method by a wireless power reception device, the method comprising:

receiving a wireless power signal from a wireless power transmission device via a secondary coil of the wireless power reception device; and

communicating with the wireless power transmission device using a modulator, the wireless power reception device having a series capacitor coupled the secondary coil, wherein the modulator is coupled with a controller, and wherein the modulator modulates an amplitude of the wireless power signal, the modulator including:

a first resistor connected in series with a first switch, and connected with a first terminal, and

a second resistor connected in series with a second switch, and connected with a second terminal.

13. The method of claim 12 , wherein the first terminal comprises a terminal of the series capacitor.

14. The method of claim 12 , wherein the second terminal comprises a terminal of the secondary coil.

15. The method of claim 12 , wherein the modulator is coupled between the secondary coil and a rectifier.

16. The method of claim 12 , wherein at least one of the first switch and the second switch is a transistor.

17. The method of claim 16 , wherein the transistor is any one of a metal oxide silicon field effect transistor (MOSFET) and a bipolar junction transistor (BJT).

18. The method of claim 12 , further comprising measuring a strength of the wireless power signal by monitoring an output of a rectifier configured to rectify the wireless power signal to a direct current (DC) power, wherein communicating with the wireless power transmission device using the modulator comprises communicating the strength of the wireless power signal using the modulator.

19. The method of claim 12 , wherein the modulator is coupled to a direct current (DC) terminal of the wireless power reception device.

20. The method of claim 12 , wherein the modulator is coupled to an alternating current (AC) terminal of the wireless power reception device.

21. The method of claim 12 , wherein the modulator includes two or more transistors and two or more resistors.

Assignments (3)
CHANGE OF NAME Recorded Jan 30, 2026
From: GE HYBRID TECHNOLOGIES, LLC
To: DOLBY HYBRID TECHNOLOGIES, LLC
Reel/Frame 074573/0426 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 16, 2024
From: JUNG, CHUN-KIL; KIM, HAK DO; NOH, SANG YOUN
To: HANRIM POSTECH CO., LTD.
Reel/Frame 068002/0487 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 16, 2024
From: HANRIM POSTECH CO., LTD.
To: GE HYBRID TECHNOLOGIES, LLC
Reel/Frame 068002/0540 →
Continuity (6)
Continuation 18329795 · Jun 6, 2023
Continuation 17322249 · May 17, 2021
Continuation 16803475 · Feb 27, 2020
Continuation 15313972
Provisional Application 62002942 · May 26, 2014
Related Publication 20240372405A1 · Nov 7, 2024
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