Electromagnetic exciter and screen sound generating device

An electromagnetic exciter and screen technology, applied in the direction of sensors, electrical components, etc., can solve problems such as unstable vibration, poor heat dissipation of coils, and large radiation sound distortion, so as to reduce radiation sound distortion, avoid nonlinear phenomena, and indicate low temperature Effect

Active Publication Date: 2020-03-17
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the magnetic field utilization rate of this electromagnetic actuator is low, and the driving force is small
[0005] In addition, the driving force changes nonlinearly with the displacement of the vibrator, resulting in unstable vibration and large distortion of radiated sound
[0006] In addition, the stator is fixed, and the heat dissipation of the coil is poor, which makes the electromagnetic exciter generate serious heat.

Method used

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  • Electromagnetic exciter and screen sound generating device
  • Electromagnetic exciter and screen sound generating device
  • Electromagnetic exciter and screen sound generating device

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Embodiment Construction

[0039] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0041] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0042] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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PUM

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Abstract

Disclosed are an electromagnetic exciter and a screen sound production apparatus. The exciter comprises a housing, a vibrator assembly and a stator assembly. The stator assembly and the vibrator assembly are accommodated in the housing. The vibrator assembly is suspended in the housing by means of an elastic element, comprises a coil and a core post disposed in the coil, and is located in the magnetic field of the stator assembly. The stator assembly comprises a Halbach permanent magnet array.

Description

technical field [0001] The invention relates to the technical field of electroacoustic conversion, and more particularly, to an electromagnetic exciter and a screen sound generating device. Background technique [0002] In order to increase the screen-to-body ratio (ie, the ratio of the screen area to the front area) of electronic products such as mobile phones, it has become a development trend to cancel the handset. In some solutions, the earpiece is replaced by a screen sound device. The screen sound generating device usually includes a screen body and an electromagnetic exciter arranged on the screen body. The electromagnetic exciter vibrates, thereby driving the screen body to vibrate to emit sound. [0003] Existing electromagnetic exciters usually include a stator, a vibrator and a casing. The stator includes coils. The vibrator includes a permanent magnet and a mass connected together. The vibrator is suspended in the cavity of the housing through the shrapnel. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R9/06H04R9/02
CPCH04R9/02H04R9/06
Inventor 祖峰磊杨鑫峰
Owner GOERTEK INC
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