Industrial Technology Research Institute

Taiwan Electrets Electronics Co., Ltd.

3-o Lab Co. Ltd.

Dar-Ming Chiang

Jen-Luan Chen

Shu-Ru Lin

Wen-Liang Liu

Yan-Ren Chen

Jen-luan Chen

Shen-Long Liang

Ming-Daw Chen

Chang-Ho Liou

Shur-Fen Liu

Mei-Rurng Tseng

Jyi-Tyan Yeh

Tsung-Lung Yang

Jyh-Long Jeng

Chun-Ti Chen

Jonq-Min Liu

You-Chia Chang

Lon-Cheng Cheng

Long-Cheng Cheng

E-Hung Lu

I-Chen Lee

Jen-Yuh Jiang

Ling-Huei Chen

Kun-Lung Yen

I-hui Lin

An electrostatic electroacoustic transducer includes a first structure, a second structure and a third electrode. The third electrode is located between the first structure and the second structure. The first structure includes a first driving element, a first spacer and a first diaphragm, and the second structure includes a second driving element, a second spacer and a second diaphragm. By providing an alternating voltage source, a transformer and a bias voltage, the electrostatic electroacoustic transducer with a dual-diaphragm structure has a high efficiency and an enlarged range of audio frequency.

Electrostatic electroacoustic transducer and fabricating methods for the same

A transparent speaker is suitable for being disposed on a display panel. The transparent speaker includes a transparent membrane, a transparent electrode plate, and spacers. Each transparent electrode plate has a plurality of openings. The display panel includes a plurality of pixels. The pixels emit optical signals. A Moire spatial period of the optical signals is less than 600 &#x3bc;m after the optical signals pass through the transparent speaker. When the transparent speaker is disposed on the display panel, a user is able to watch an image on the display panel through the transparent speaker without being interfered by a Moire.

Transparent speaker and display module integrating the same

An electrostatic speaker and a method for manufacturing the speaker are disclosed. Said speaker comprises a vibrating film; an electrode portion disposed on a surface of the vibrating film and joined with the vibrating film; and a conductive backplate spaced from the electrode portion by a distance, the conductive backplate forming a plurality of holes, the vibrating film being deformed and vibrated to generate and release a sound through the holes due to a variation of an electric field generated between the conductive backplate and the electrode portion, wherein the conductive backplate is covered by a polymer layer serving as a protective film. The covering polymer layer on the conductive backplate is capable of improving the stability of the electrostatic speaker and increasing its lifespan.

Electrostatic speaker and manufacturing method thereof and conductive backplate of the speaker

An electrostatic electroacoustic device comprising a first electrode configured to receive an audio signal, a second electrode configured to receive the audio signal, a first electret between the first electrode and the second electrode, the first electret including at least one dielectric layer containing electrostatic charges, a second electret between the first electrode and the second electrode, the second electret including at least one dielectric layer containing electrostatic charges, and a conductive layer sandwiched between the first electret and the second electret, the conductive layer, the first electret and the second electret being capable of vibratory motion relative to the first electrode and the second electrode based on the audio signal.

Electrostatic electroacoustic transducers

The present invention provides an electret transducer with solar power. The provided electrets transducer includes a solar power supply device, an amplifier circuit having a first input terminal coupled to the solar power supply device and a second input terminal coupled to an audio signal input terminal, and an electret loudspeaker coupled to an output terminal of the amplifier circuit. The amplifier circuit receives a first voltage level via the first input terminal and boosts the first voltage level to a second voltage level, and receives a first audio signal via the second input terminal and amplifies the first audio signal to a second audio signal. The electret loudspeaker coupled to the output terminal of the amplifier circuit receives the second audio signal and outputs a sound corresponding to the second audio signal.

Electret transducer with solar power and amplifier circuitry

Electret transducer with solar power

Disclosed is a 3-dimension non-bias electrets multi-touch device, comprising a first electrets thin film providing a first bias electric charge to form an electrostatic field, a first electrode, a second electrode and a controller. The first electrode is attached to the first electrets thin film and outputs a first signal when the electrostatic field is changed by a deformation of the first electrets thin film due to contact pressures of external forces. The second electrode outputs a second signal when the electrostatic field is changed. The first and second electrodes transmit the first and second signals to the controller. The controller is capable to detect and analyze positions where the contact pressures of the external forces are applied and normal vector shifts of the first electrets thin film at the positions.

3-dimension non-bias electrets multi-touch device

A garment with a speaker function is provided. The garment includes a garment body, a bag, and an electret speaker. The bag disposed on the garment body includes a sound-absorbing layer. The electret speaker, disposed in the bag, gives off sounds to a first direction and a second direction at the same time. The sound-absorbing layer absorbs the sound of the second direction. Therefore, the present invention not only provides convenience to the user, but also enhances the acoustic quality of the electret speaker.

Garment with speaker function

An electrostatic electroacoustic device comprising a first electrode configured to receive an audio signal, a first conductive film configured to receive the audio signal, a first electret between the first electrode and the first conductive film, the first electret being capable of vibratory motion relative to the first electrode based on the audio signal, a second electrode configured to receive the audio signal, a second conductive film configured to receive the audio signal, the second conductive film being electrically isolated from the first conductive film, and a second electret between the second electrode and the second conductive film, the second electret being capable of vibratory motion relative to the second electrode based on the audio signal.

The present invention provides a fluorinated cyclic olefin electret film including a fluorinated cyclic olefin polymer film characterized by having a cyclic olefin polymer grafted with a fluorocarbon alkyl group, and a parylene film over the fluorinated cyclic olefin polymer film.

Fluorinated cyclic olefin electret film

The present invention provides a graft polymer and compositions comprising a cyclic olefin polymer characterized by having a glass transition temperature of about 60&#xb0; C. to 250&#xb0; C. and a molecular weight of about 400 to 300000, and a fluorocarbon alkyl group grafted on the cyclic olefin polymer.

Fluorinated cyclic olefinic graft polymer

An electret and composite formed therewith. The electret includes a polymer, copolymerizing from monomers including VdF as a first monomer and HFP, CTFE, TFE, or combinations thereof as a second monomer.

Electret and composite formed therewith

This invention mainly provides a SMT-type structure of the minimized and low-power silicon-based electret condenser microphone. Primarily integrates with the electret, silicon-based, MEMS and microphone techniques to implement the minimized and low-power silicon-based electret condenser microphone. The Silicon-based bi-diaphragm of the composite diaphragm-chip was coated with the low-dielectric macromolecule material to allow the microphone acquires the sufficient electrical charges. Moreover, the impedance matching element of the microphone that MOSFET was implemented by the MEMS technology. Conclusively, this silicon-based electret condenser microphone gains several achievements as the smallest volume, a lower bias voltage, a SMT-type structure, a lower residue stress and a lower assembly cost.

SMT-type structure of the silicon-based electret condenser microphone

A magnetic circuit applied for loudspeakers includes a cup-shaped yoke, a primary magnet, a surrounding top plate, a first central top plate, and a thin magnet. The cup-shaped yoke includes a bottom part and a ring part. The primary magnet is located within the bottom part of the yoke and serves as a magnetic field source. The surrounding top plate and the first central top plate are respectively located on the ring part of the yoke and the primary magnet. A air gap between the surrounding top plate and the first central top plate is formed and used for accommodating a voice coil, which may actuate a diaphragm to emit sound. The thin magnet is located on the first central top plate and repels the primary magnet magnetically. Therefore, the magnetic leakage above the air gap can be strongly reduced. In addition, an additional second central top plate is mounted on the thin magnet and may serve as magnetic shielding.

Light weight and low magnetic leakage loudspeaker

A tennis racket having a frame with the cross section thereof constituted by a plurality of different shapes, including at least triangles and ellipses. The frame is constituted by three sections, of which the first is connected to the shaft of the racket via a base section and has an elliptical cross section so as to provide a more rigid percussion region and thus better control over tennis balls, the second is next to the tip of the frame and has a triangular cross section which is capable of supporting greater top and lateral forces resulting from contact with external objects, and the third is disposed between the first and second and has an intermediate shape that changes gradually from the ellipse of the elliptical section to the triangle of the triangular section so as to provide a connection and continuity between the two.

Growing community of inventors

Hsinchu, Taiwan

Dar-Ming Chiang