Mplus Co., Ltd.

Samsung Electro-mechanics Co., Ltd.

Yeon Ho Son

Jae Kyung Kim

Joon Choi

Dong Sun Park

Dong Su Moon

Dae Woong Yun

Jun Kun Choi

Kum Kyung Lee

Kyung Su Park

Yong Tae Kim

Ki Suk Woo

Ji Yeoun Jang

Sang Jin Lee

Tae Hoon Lee

Seung Hyeon Jeong

Seok Jun Park

Yong Jin Kim

Hwa Young Oh

Kyung Suh Park

Su Young Jung

Jung Hyun Park

Seung Wook Kim

Tae Hyeong Lim

Seuk Hwan Chung

In Ho Lee

Soon Do Kweon

Ii Oung Park

Sung Hoon Jung

Chang Soo Kim

A sound vibration actuator includes: a casing having an internal space formed by an underside casing part, a side periphery casing part, and a top casing part; a coil part coupled to the top casing part in such a manner as to receive power from the outside; a magnet part disposed in the internal space of the casing and having a magnet and a weight; an elastic member whose one surface coupled to the magnet part; and a weight part coupled to the coil part. The sound vibration actuator can be varied in coupling ways of the components thereof to generate vibrations in a high frequency band as well as a low frequency band.

Sound vibration actuator

A sound vibration actuator includes: a casing having an internal space formed by an underside casing part, a side periphery casing part, and a top casing part; a first vibration assembly disposed in the internal space of the casing; a second vibration assembly disposed between the first vibration assembly and the top casing part in such a manner as to be coupled to the top casing part; an elastic member whose one surface coupled to the first vibration assembly; and a third vibration assembly disposed between the first vibration assembly and the underside casing part in such a manner as to be coupled to the underside casing part. The sound vibration actuator includes at least three or more vibration assemblies disposed therein, thereby obtaining at least three or more resonance frequencies.

Sound vibration actuator with three vibration assemblies and different frequencies

A sound vibration actuator includes: a casing having an internal space, a coil part coupled to the casing to receive power, a magnet part disposed in the casing, an elastic member whose one surface coupled to the magnet part, a substrate drawn from the internal space, and an external device-coupling part disposed on an outer peripheral surface of the casing to be coupled to an external device, wherein the casing has an underside casing part, a side periphery casing part, and a top casing part, the coil part is coupled to the top casing part, and the external device-coupling part includes a first coupling area coming into contact with a portion of the outer periphery of the side periphery casing part and second coupling areas extended from the first coupling area in a vertical direction to the first coupling area coupled to the external device.

A sound vibration actuator includes: a bracket and a casing for forming an internal space; a coil part coupled to the bracket in the internal space; a magnet part disposed around the coil part; an elastic member whose one surface coupled to the magnet part; a substrate fixed to the bracket and exposed outward from the internal space; and a substrate seating part disposed on the outer peripheral surface of the casing, wherein the substrate is disposed on top of the substrate seating part. The sound vibration actuator reduces the entire thickness thereof, while constantly maintaining an amount of vibration and generate vibrations in various frequency bands because the coil and the magnet are not fixed in the process where the vibrations are generated.

A technology for implementing a finer button click of a device including an LRA by reducing the falling time of an LRA after a click is implemented by controlling an input signal applied to the LRA depending on an operating characteristic of the LRA. A user's operational convenience can be improved by omitting a real button positioned in the front part of a mobile phone, and more smooth display watching and manipulation are made possible by increasing the size of a display. Furthermore, the button click of a device including an LRA can be realistically implemented by controlling only the frequency of an input signal without adding a separate device or a control circuit to the LRA.

Method of implementing button click using control of input signal

A linear vibration motor includes a bracket, a coil provided to the bracket, a case for covering the bracket, a mass positioned in the case, at least two or more springs, each of which one end is connected to the mass and the other end is connected to one surface of the case, a magnet coupled to the mass to be integrated therewith and facing the coil, a plate coupled to the mass to be integrated therewith and positioned on the magnet, and a friction reducing part provided on at least one surface of the mass and reducing friction between the mass and the bracket. The mass vibrates in the horizontal direction such that the thickness of the linear vibration motor is not increased but can be manufactured thin. Therefore, it is advantageous in terms of space when the linear vibration motor is arranged in a mobile phone.

Linear vibration motor that vibrates horizontally

A linear vibrator having a flexible printed circuit board including a copper film pattern processed in a meander line pattern and, more particularly, a linear vibrator for solving a frequency interference problem between an electromagnetic structure and antenna disposed within a mobile device using a flexible printed circuit board (FPCB) including a copper film pattern processed in a meander line pattern in the linear vibrator. The linear vibrator can avoid resonant frequency interference through the copper film pattern having a frequency region out of the resonant frequency region of an antenna within a mobile device by processing the copper film pattern unique to an FPCB used in a linear vibrator.

Linear vibrator

A method for driving a piezo actuator includes detecting consumption current by stepwise sweeping the frequency of an actuator driving signal to drive the piezo actuator vibrated in response to first and second vibration modes from a first reference frequency and determining a frequency at which the consumption current is inflected to be a first resonant frequency, detecting consumption current by stepwise sweeping the frequency of the actuator driving signal from a second reference frequency and determining a frequency at which the consumption current is inflected to be a second resonant frequency, and outputting an actuator driving signal in response to the first resonant frequency and the second resonant frequency.

Method and apparatus for driving piezo actuator

A horizontal linear vibration motor for securing the straightness of a coil spring and preventing a driving unit, such as a mass body, from axially rotating around the axis of a shaft within a housing due to the rotational property of the coil spring by providing a coil and a magnet for generating a force that enables the reciprocating motion of the driving unit including the mass body and an anti-rotation member provided in the driving unit to slide and come into contact with the housing.

Horizontal linear vibration motor

A piezoelectric vibration module includes external electrodes arranged in a stack direction on the outside surface of a piezoelectric device so that the state in which the piezoelectric device is coupled to the terminals of an FPCB can be reliably maintained even in a piezoelectric device bending phenomenon dependent on the repetition of contraction and/or expansion of the piezoelectric device. A portion in which the external electrodes of the piezoelectric device come in contact with the FPCB may be placed in a portion having small displacement.

Piezoelectric vibration module

A vibrator includes: a housing having an interior space; a vibrating member installed within the housing; a piezoelectric element installed on a top surface of the vibrating member; and space forming parts disposed to face side surfaces of the piezoelectric element, respectively, and forming a space in which a filler is provided, together with the side surfaces of the piezoelectric element.

Vibrator

There is provided a piezoelectric vibration actuator including: a flat cover member; a vibration portion including a vibration plate that is spaced apart from the cover member in parallel by a predetermined distance and a piezoelectric element that generates a vibration force by repeatedly expanding and contracting according to power applied from the outside; a weight portion disposed on the vibration portion to increase the vibration force of the piezoelectric element; and a binding member fixing the vibration portion and the weight portion. In addition, an enclosure portion is interposed between the weight portion and the vibration portion to enclose the center areas of the vibration portion, thereby making it possible to protect the piezoelectric element.

Piezoelectric vibration actuator

There is provided a vibration generating device including: a housing having an internal space; a vibration member having one end fixedly attached to the housing; a piezoelectric element installed on the vibration member; and a mass body fixedly attached to the vibration member, wherein the vibration member includes an installation part on which the piezoelectric element is installed, and an extension part extended from at least one side surface of the installation part, and a maximum displacement portion of the vibration member is changed depending on a vibration mode.

Vibration generating device

Disclosed herein is a piezoelectric vibration module capable of improving adhesion between a piezoelectric element and an external electrode disposed on the piezoelectric element, the piezoelectric vibration module, including: a piezoelectric element printing patterns of a first internal electrode and a second internal electrode therein and having a first external electrode electrically connected to the first internal electrode and a second external electrode electrically connected to the second internal electrode on an external surface thereof, wherein the first external electrode and the second external electrode are made of silver (Ag) and are formed on the external surface of the piezoelectric element.

There is provided a vibration generating apparatus including: a housing having an internal space; a vibration member having both end portions thereof fixed to the housing; and a piezoelectric element installed on the vibration member, wherein the vibration member includes a first member having the piezoelectric element installed thereon and second members disposed at both end portions of the first member, the second members being formed of a material having a higher degree of tensile strength than the first member.

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Suwon-si, South Korea

Yeon Ho Son