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US 8,411,882 B2Granted
Electronic device with electret electro-acoustic transducer
AssigneeHTC Corporation
InventorsFang Ching Lee, Yi Tsung Cheng, Chih Chao Hsieh
Life of this patent
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Abstract
An electronic device is provided. The electronic device includes a housing and an electro-acoustic transducer disposed on the inner surface of the housing. The electro-acoustic transducer includes an electret diaphragm, a conductive plate and at least one spacer. The electret diaphragm is positioned on the inner surface of the housing and has a film body and an electrode layer. The film body has static charges and the electrode layer is formed on the lower surface of the film body. The conductive plate has a plurality of openings and is stacked on the upper surface of the film body. The spacer is positioned between the electret diaphragm and the conductive plate to keep a predetermined distance therebetween.
Claims30
An electronic device, comprising:
- a housing having an inner surface, an outer surface and a plurality of openings penetrating between the inner surface and the outer surface;
- a first electrical terminal and a second electrical terminal disposed on the inner surface of the housing;
- a circuit board having a third electrical terminal and a fourth electrical terminal disposed thereon;
- and
- an electro-acoustic transducer disposed on the inner surface of the housing and electrically connected to the circuit board, the electro-acoustic transducer comprising:
- a first electret diaphragm configured to vibrate and make sounds in accordance with a first electrical signal, the first electret diaphragm being positioned on the inner surface of the housing and having a first film body and a first electrode layer, wherein the first film body includes opposing upper and lower surfaces and has static charges, and the first electrode layer is formed on the lower surface of the first film body;
- a first conductive plate stacked on the upper surface of the first film body and having a plurality of openings, wherein the first electrode layer of the first electret diaphragm and the first conductive plate are electrically connected to receive the first electrical signal;
- and
- at least one first spacer disposed between the first electret diaphragm and the first conductive plate to keep a predetermined distance between the first electret diaphragm and the first conductive plate;
- wherein the third and fourth electrical terminals of circuit board are electrically connected to the first and second electrical terminals, respectively, for applying the first electrical signal to the first electrode layer of the first electret diaphragm and the first conductive plate, respectively.
7 more elements
An electronic device, comprising:
- a housing having an inner surface, an outer surface and a plurality of openings penetrating between the inner surface and the outer surface;
- a first electrical terminal and a second electrical terminal disposed on the inner surface of the housing:
- a circuit board having a third electrical terminal and a fourth electrical terminal disposed on the circuit board;
- and
- an electro-acoustic transducer disposed on the inner surface of the housing and electrically connected to the circuit board, the electro-acoustic transducer comprising:
- a conductive plate disposed on the inner surface of the housing and having a plurality of openings, wherein the conductive plate is electrically connected to receive an electrical signal;
- an electret diaphragm configured to vibrate and make sounds in accordance with the electrical signal, the electret diaphragm being stacked on the conductive plate and having a film body and an electrode layer, wherein the film body includes opposing upper and lower surfaces and has static charges, and the electrode layer is formed on the upper surface of the film body and is electrically connected to receive the electrical signal;
- and
- at least one first spacer disposed between the electret diaphragm and the conductive plate to keep a predetermined distance between the electret diaphragm and the conductive plate;
- wherein the third and fourth electrical terminals of circuit board are electrically connected to the first and second electrical terminals, respectively, for applying the electrical signal to the electrode layer of the electret diaphragm and the conductive plate, respectively.
7 more elements
An electronic device, comprising:
- a housing having an inner surface, an outer surface and a plurality of openings penetrating between the inner surface and the outer surface;
- a first electrical terminal and a second electrical terminal disposed on the inner surface of the housing:
- a circuit board having a third electrical terminal and a fourth electrical terminal disposed on the circuit board;
- and
- an electro-acoustic transducer disposed on the inner surface of the housing and electrically connected to the circuit board, the electro-acoustic transducer comprising:
- a conductive layer formed on the inner surface of the housing, wherein the conductive layer is electrically connected to receive an electrical signal;
- an electret diaphragm configured to vibrate and make sounds in accordance with the electrical signal, the electret diaphragm being stacked on the conductive layer and having a film body and an electrode layer, wherein the film body includes opposing upper and lower surfaces and has static charges, and the electrode layer is formed on the upper surface of the film body and is electrically connected to receive the electrical signal;
- and
- at least one spacer disposed between the electret diaphragm and the conductive layer to keep a predetermined distance between the electret diaphragm and the conductive layer;
- wherein the third and fourth electrical terminals of circuit hoard are electrically connected to the first and second electrical terminals, respectively, for applying the electrical signal to the electrode layer of the electret diaphragm and the conductive layer, respectively.
7 more elements
Dependencies are inferred from the claim text.