Light driven contact hearing aid

Patent metadata

Field	Value
Publication number	US-12250522-B2
Application number	US-202016933323-A
Country	US
Kind code	B2
Filing date	Jul 20, 2020
Priority date	Jan 22, 2018
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

The present invention is directed to a contact hearing system utilizing an emitter adapted to emit light and a contact hearing device adapted to receive the emitted light and convert that light into sound by mechanical manipulation of a subjects ear drum. In the present invention the emitter may utilize multiple light sources and the multiple light sources may be passed through at least one diffuser in order to generate an emitted light having a broader angle of incidence with little or no loss in received power as measured by a photodetector on the contact hearing device when the contact hearing device is positioned on a subject's tympanic membrane and the emitter is positioned in the subject's ear canal.

First claim

The invention claimed is:

1. A hearing aid system comprising:
a multi-laser emitter, wherein the multi-laser emitter includes at least a first laser source positioned on a substrate and a second laser source positioned on the substrate with a configured separation distance between the first and second laser sources, and wherein the multi-laser emitter further includes a diffuser having a configured diffusion angle and positioned away from the first and second laser sources; and
a receiver, wherein the receiver comprises at least one photodetector and a microactuator, the at least one photodetector configured to receive a combined multi-laser output signal based on diffusion by the diffuser of a first laser beam from the first laser source and a second laser beam from the second laser source, wherein the combined multi-laser output signal has a total diffusion angle that is greater than the configured diffusion angle of the diffuser and is based at least in part on the configured separation distance between the first and second laser sources.

2. The hearing aid system according to claim 1 wherein the first and second laser sources comprise vertical-cavity surface-emitting laser (VCSEL) lasers.

3. The hearing aid system according to claim 1 wherein the diffuser diffuses light from the first and second laser sources with the configured diffusion angle being equal to an angle of greater than approximately 50 degrees.

4. The hearing aid system according to claim 1 wherein the diffuser diffuses light from the first and second laser sources with the configured diffusion angle being equal to an angle of greater than approximately 30 degrees.

5. The hearing aid system according to claim 1 wherein the first laser source is on a first side of the multi-laser emitter and the second laser source is on a second side of the multi-laser emitter.

6. The hearing aid system according to claim 5 wherein a centerline runs through the multi-laser emitter, the first laser source being positioned on a first side of the centerline and the second laser source being positioned on a second side of the centerline.

7. A method of selecting at least one laser source from a plurality of laser sources in a multi-laser emitter of a hearing aid system, the method comprising:
driving each laser source of the plurality of laser sources, wherein the plurality of laser sources includes at least a first laser source positioned on a substrate and a second laser source positioned on the substrate with a configured separation distance between the first and second laser sources, and wherein the multi-laser emitter further includes a diffuser having a configured diffusion angle and positioned away from the first and second laser sources;
measuring a feedback signal based on receiving a combined multi-laser output signal using at least one photodetector of a receiver of the hearing aid system, wherein:
the at least one photodetector is configured to receive the combined multi-laser output signal based on diffusion by the diffuser of a first laser beam from the first laser source and a second laser beam from the second laser source; and
a total diffusion angle associated with the combined multi-laser output signal is greater than the configured diffusion angle of the diffuser, the total diffusion angle based at least in part on the configured separation distance between the first and second laser sources; and

selecting, from the plurality of laser sources, a respective laser source which provides the feedback signal having the largest magnitude.

8. The method according to claim 7 wherein the method further includes the step of selecting an additional laser source from the plurality of laser sources by selecting the laser source which creates the feedback signal having the second largest magnitude.

9. The method according to claim 7 wherein the respective laser source selected from the plurality of laser sources is used to transmit information to the receiver of the hearing aid system, wherein the receiver comprises the at least one photodetector and a microactuator.

10. The method according to claim 9 wherein the respective laser source selected from the plurality of laser sources is used to transmit power to the receiver.

11. The method according to claim 7 wherein the feedback signal is an audio feedback signal.

12. The method according to claim 7 wherein the feedback signal is an electronic feedback signal.

13. A method of transmitting information from a multi-laser emitter to a receiver in a hearing aid, the method comprising:
radiating light energy from at least two laser sources in the multi-laser emitter;
diffusing the radiated light energy using a diffuser at an output of the multi-laser emitter; and
redirecting the radiated light energy as it passes through the diffuser, wherein the radiated light energy has a total diffusion angle that is greater than a configured diffusion angle of the diffuser and is based at least in part on a configured separation distance between the at least two laser sources.

14. The method according to claim 13 wherein:
the at least two laser sources includes a first laser source and a second laser source;
the light energy from the first laser source is redirected in a first direction; and
the light energy from the second laser source is redirected in a second direction.

15. The method according to claim 14 wherein the first direction is away from the second direction.

16. The method according to claim 14 wherein the first direction is toward the second direction.

17. The method according to claim 14 wherein the first direction is substantially orthogonal to a substrate on which the at least two laser sources are mounted.

18. The method according to claim 14 wherein the first direction is substantially orthogonal to an output surface of the diffuser.

Assignees

• Earlens Corp

Inventors

• Shaquer Cem
• Wong Louis
• Chan Kin
• Rucker Paul

Classifications

• H04R25/603

  of mechanical or electronic switches or control elements · CPC title

• H01S5/005

  Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping (H01S5/026, H01S5/18388 take precedence) · CPC title

• H04R25/554

  using a wireless connection, e.g. between microphone and amplifier or using Tcoils · CPC title

• A61F2002/183

  Ear parts · CPC title

• A61F2/18

  Internal ear or nose parts, e.g. ear-drums {(implants for middle ear ventilation or drainage A61F11/202)} · CPC title