Speaker device and control method for a speaker device
US-2019124439-A1 · Apr 25, 2019 · US
Speaker apparatus including a panel and vibration elements
US10524043B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10524043-B2 |
| Application number | US-201815868430-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 11, 2018 |
| Priority date | Feb 3, 2017 |
| Publication date | Dec 31, 2019 |
| Grant date | Dec 31, 2019 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A speaker apparatus according to an embodiment includes a panel, one or more vibration elements, a drive unit, and a reflection part. The one or more vibration elements vibrate the panel. The drive unit applies a driving signal to the one or more vibration elements to form a striped vibration region on the panel. The driving signal is obtained by modulating a carrier wave of an ultrasonic band by a sound signal of an audible frequency band. The reflection part reflects at least one of first and second ultrasonic waves, which are generated from the vibration region and advancing in respective different directions, so as to bring an advancing direction of the first ultrasonic wave and that of the second ultrasonic wave close to each other.
First claim
Opening claim text (preview).
What is claimed is: 1. A speaker apparatus comprising: a panel; one or more vibration elements that vibrate the panel; a drive unit that applies a driving signal to the one or more vibration elements to form a striped vibration region on the panel, the driving signal being obtained by modulating a carrier wave of an ultrasonic band by a sound signal of an audible frequency band, the striped vibration region including a plurality of line-shaped vibration regions that are antinodes of a standing wave generated on the panel, a group of first ultrasonic waves and a group of second ultrasonic waves being generated by interference between a plurality of ultrasonic waves generated from the plurality of line-shaped regions, the group of first ultrasonic waves respectively radiating from the plurality of line-shaped vibration regions in a first direction, and the group of second ultrasonic waves respectively radiating from the plurality of line-shaped vibration regions in a second direction that is different from the first direction; and a reflection part that reflects the group of second ultrasonic waves to cause the group of second ultrasonic waves to advance in the first direction. 2. The speaker apparatus according to claim 1 , wherein the reflection part is arranged close to an end part of the panel, and includes a reflection plate extending in a direction intersecting with the panel. 3. The speaker apparatus according to claim 1 , further comprising a load applying part that applies a load to the panel, wherein the drive unit controls the load applying part to suppress generation of the vibration region.
Assignees
Inventors
Classifications
Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) · CPC title
Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves · CPC title
- H04R1/2811Primary
for loudspeaker transducers · CPC title
for loudspeakers · CPC title
using a plurality of acoustic drivers (H04R1/24 and H04R1/403 take precedence) · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10524043B2 cover?
- A speaker apparatus according to an embodiment includes a panel, one or more vibration elements, a drive unit, and a reflection part. The one or more vibration elements vibrate the panel. The drive unit applies a driving signal to the one or more vibration elements to form a striped vibration region on the panel. The driving signal is obtained by modulating a carrier wave of an ultrasonic band …
- Who is the assignee on this patent?
- Denso Ten Ltd
- What technology area does this patent fall under?
- Primary CPC classification H04R1/2811. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 31 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).