# US 10,771,900 B2 · Speaker diaphragm structure

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- Number: US 10,771,900 B2
- Document ID: US10771900B2
- Status: Granted
- Kind: B2
- Application number: 16/544,646
- Filed: 2019-08-19
- Published: 2020-03-05
- Granted: 2020-09-08
- Earliest claimed: 2018-09-03
- Assignees: Fu Jen Catholic University; Micro Lithography, Inc.
- Applicants: Fu Jen Catholic University; Micro Lithography Inc.
- Inventors: Ching-Bore Wang; Chien-Sheng Chen; Hao-Zhi Li; Wei-Jen Lee
- Web page: https://patentgrep.com/patent/US10771900B2

## CPC

- H04R 7/125: {comprising a plurality of superposed layers in contact}
- H04R 7/127: {dome-shaped}
- H04R 7/18: at the periphery
- H04R 31/003: {for diaphragms or their outer suspension}
- H04R 2307/021: Diaphragms comprising cellulose-like materials, e.g. wood, paper, linen
- H04R 2307/025: Diaphragms comprising polymeric materials
- H04R 2307/027: Diaphragms comprising metallic materials
- H04R 2400/11: Aspects regarding the frame of loudspeaker transducers
- 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)

## Abstract

A speaker diaphragm structure is installed inside a sound generator device which comprises a frame, a speaker diaphragm structure installed within the frame and a suspension edge whose inner perimeter is connected to the speaker diaphragm structure and whose outer perimeter is connected to the frame; herein the speaker diaphragm structure includes a diaphragm body and a composite material layer, in which the composite material layer is used for bonding onto the surface of the diaphragm body or attaching within the diaphragm body; moreover, the composite material layer is composed of one or more types of tetrapyrrole compounds as well as one or more types of metal ions; additionally, the composite material layer has a thickness smaller than the thickness of the diaphragm body, and is mainly applied to provide the performance effect of sound quality modifications.

## Claims

### Claim 1

A speaker diaphragm structure installed within a sound generator device which comprises a frame, a speaker diaphragm structure installed within the frame, and a suspension edge whose inner perimeter is connected to the speaker diaphragm structure and whose outer perimeter is connected to the frame; herein the speaker diaphragm structure includes:
a diaphragm body; and
a composite material layer, in which the composite material layer is used for bonding onto the surface of the diaphragm body or attaching within the diaphragm body, and the composite material layer is composed of one or more types of tetrapyrrole compounds as well as one or more types of metal ions; additionally, the composite material layer has a thickness smaller than the thickness of the diaphragm body.

### Claim 2 (depends on 1)

The speaker diaphragm structure according to claim 1, wherein the molar mixture ratio of the tetrapyrrole compound to the metal ions ranges from 0.2 to 20.

### Claim 3 (depends on 1)

The speaker diaphragm structure according to claim 1, wherein the diaphragm body is a polymer film, a polymer cloth, a woven cloth or a cellulose composite material film.

### Claim 4 (depends on 3)

The speaker diaphragm structure according to claim 3, wherein, in case the diaphragm body is a polymer film, the mixture ratio of the tetrapyrrole compound to the diaphragm body ranges from 2×10−5−4×10−3.

### Claim 5 (depends on 3)

The speaker diaphragm structure according to claim 3, wherein the cellulose composite material film contains at least one or more types of cellulose, hemicellulose, lignin, wool, cotton, wood and/or wood fiber, and the cellulose composite material film can be also manufactured with paper formed by means of one or more types of cellulose, hemicellulose and/or lignin.

### Claim 6 (depends on 5)

The speaker diaphragm structure according to claim 5, wherein, in case the diaphragm body is made of wood fibers, the mixture ratio of the tetrapyrrole compound to the diaphragm body ranges from 10−4−4×10−3.

### Claim 7 (depends on 5)

The speaker diaphragm structure according to claim 5, wherein, in case the diaphragm body is made of paper, the mixture ratio of the tetrapyrrole compound to the diaphragm body ranges from 2×10−5−4×10−3.

### Claim 8 (depends on 1)

The speaker diaphragm structure according to claim 1, wherein the tetrapyrrole compound is a porphin compound or sodium copper chlorophyllin.

### Claim 9 (depends on 1)

The speaker diaphragm structure according to claim 1, wherein the metal ions are magnesium, calcium, nickel, copper, zinc, silver, gold, aluminum or zirconium.