A sounding device and terminal equipment
A sounding device and accommodating tank technology, applied in the direction of sensors, electrical components, etc., can solve the problems of affecting the sounding effect of the sounding device, rising, and the amplitude drop of the high-frequency frequency response of the sounding device, so as to achieve high-frequency frequency response improvement and impedance matching The effect of improving conditions and good vocal effect
Active Publication Date: 2022-03-08
HUAWEI TECH CO LTD
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Problems solved by technology
However, the voice coil has a self-inductance effect. When the frequency of the alternating current passing through the voice coil is high, the self-inductance of the voice coil will generate a large induced current, so that the impedance of the voice coil will increase rapidly with the increase of the angular frequency. rise, so as to cause the amplitude of the high-frequency frequency response of the sounding device to decrease, thereby affecting the sounding effect of the sounding device
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[0036] In order to facilitate the understanding of the sound generating device provided in the embodiment of the present application, the application scenario of the sound generating device provided in the embodiment of the present application will be described first below. In this application, the sound generating device and the terminal device provided with the sound generating device are described in detail by taking the sound generating device installed in a mobile phone as an example.
[0037] The screen sound technology using the magnetic suspension can divide the sound device into two parts, one part is attached to the display screen, and the other part is fixed on structural parts such as the middle frame. Part of the sound generating device fixed on the middle frame and other structural parts is provided with a coil, so, refer to figure 1 , the coil 1 (also called a voice coil) can be placed in a magnetic field (the magnetic field strength is B), and by applying an AC...
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The present application provides a sound emitting device and terminal equipment, which relate to the technical field of electronic equipment. The sound generating device mainly includes a first magnetic conduction structure, a first magnetic element, a second magnetic element, a voice coil group and a second magnetic conduction structure. The first magnetic element is connected to the first magnetic conduction structure to form a first vibrating body, and the voice coil group and the second magnetic element are connected to the second magnetic conduction structure to form a second vibrating body. In addition, the voice coil set includes at least two voice coils, and a part of the voice coils in the at least two voice coils is connected in parallel with a high-frequency short-circuit element in one-to-one correspondence. In the high-frequency state, the voice coil with the high-frequency short-circuit element in parallel is short-circuited, thereby reducing the high-frequency impedance of the voice coil group, so that the force generated by the voice coil group with alternating current in the changing magnetic field can meet The requirements for the vibration driving force of the sounding device are conducive to improving the sounding effect.
Description
technical field [0001] The present application relates to the technical field of electronic equipment, and in particular to a sound generating device and terminal equipment. Background technique [0002] Sound comes from vibration, and the sound of most terminal equipment comes from the vibration of the sound generating device. At present, the mainstream sound generating devices are moving coil or moving iron, and whether it is moving coil or moving iron, the core principle is to use the Lorentz force generated by the energized coil in the magnetic field to drive the vibration of the sound generating device. [0003] Energized coils are often referred to in the industry as voice coils. The sound-generating device (speaker, vibration motor, etc.) drives the sound-generating device to emit sound by energizing the voice coil in the magnetic field to generate Lorentz force. As the requirements for the vibration driving capability of the sounding device increase, increasing the...
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IPC IPC(8): H04R9/02H04R9/06
CPCH04R9/02H04R9/06
Inventor林洲丁俊寇大贺
OwnerHUAWEI TECH CO LTD