# US 12,604,129 B2 · True wireless device and dual-mode true wireless device

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- Number: US 12,604,129 B2
- Document ID: US12604129B2
- Status: Granted
- Kind: B2
- Application number: 18/063,738
- Filed: 2022-12-09
- Published: 2024-04-11
- Granted: 2026-04-14
- Earliest claimed: 2022-10-07
- Assignees: Fortemedia, Inc.
- Applicants: Fortemedia, Inc.
- Inventors: Yen-Son Paul Huang; Shih-Chin Gong
- Web page: https://patentgrep.com/patent/US12604129B2

## CPC

- H04R 1/1016: {Earpieces of the intra-aural type}
- B81B 3/0021: {Transducers for transforming electrical into mechanical energy or vice versa (dynamo-electric machines H02K99/00; electrostatic machines H02N1/00; piezoelectric devices H10N30/00)}
- H04R 1/1025: Accumulators specially adapted for earpieces; Arrangements specially adapted for charging thereof
- H04R 1/1041: {Mechanical or electronic switches, or control elements (switches in general H01H)}
- H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F)
- H04R 3/12: for distributing signals to two or more loudspeakers {(specially adapted for hearing aids H04R25/407)}
- B81B 2201/0257: Microphones or microspeakers
- H04R 2201/003: Mems transducers or their use
- H04R 2420/07: Applications of wireless loudspeakers or wireless microphones
- H04R 2460/17: Hearing device specific tools used for storing or handling hearing devices or parts thereof, e.g. placement in the ear, replacement of cerumen barriers, repair, cleaning hearing devices
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- B81B: MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES (piezoelectric, electrostrictive or magnetostrictive elements per se H10N30/00, H10N35/00)

## Abstract

A true wireless device is provided. The true wireless device includes a modulator for generating ultrasonic waves and a MEMS speaker coupled to the modulator. The MEMS speaker provides greater bandwidth than traditional speakers such as electrodynamic speakers and piezoelectric thin-film speakers. In particular, the MEMS speaker has an audio frequency band and an ultrasonic frequency band.

## Claims

### Claim 1

A dual-mode true wireless device having a normal mode and a directional-speaker mode comprising:
a modulator; and
a microelectromechanical system (MEMS) speaker coupled to the modulator, wherein the MEMS speaker has an audio frequency band and an ultrasonic frequency band,
wherein the modulator does not generate ultrasonic waves in the normal mode, and the modulator generates ultrasonic waves in the directional-speaker mode.

### Claim 2 (depends on 1)

The dual-mode true wireless device as claimed in claim 1, further comprising a first earbud and a second earbud, wherein when at least one of the first earbud and the second earbud is inserted into an ear, the dual-mode true wireless device is in the normal mode.

### Claim 3 (depends on 1)

The dual-mode true wireless device as claimed in claim 1, further comprising a first earbud and a second earbud, wherein when neither the first earbud nor the second earbud is inserted into an ear, the dual-mode true wireless device is in the directional-speaker mode.

### Claim 4 (depends on 1)

The dual-mode true wireless device as claimed in claim 1, further comprising a first earbud, a second earbud, and an earbud case, wherein when a distance between the first earbud and the earbud case or a distance between the second earbud and the earbud case is greater than a predetermined value, the dual-mode true wireless device is in the normal mode.

### Claim 5 (depends on 1)

The dual-mode true wireless device as claimed in claim 1, further comprising a first earbud, a second earbud, and an earbud case, wherein when a distance between the first earbud and the earbud case and a distance between the second earbud and the earbud case is less than a predetermined value, the dual-mode true wireless device is in the directional-speaker mode.

### Claim 6 (depends on 5)

The dual-mode true wireless device as claimed in claim 5, wherein the predetermined value is 50 cm.

### Claim 7 (depends on 5)

The dual-mode true wireless device as claimed in claim 5, wherein the predetermined value is 30 cm.