US-12627924-B2 - Speaker, speaker system and signal compensation method using the same

US12627924B2US 12627924 B2US12627924 B2US 12627924B2US-12627924-B2

Abstract

A speaker includes a housing including a front housing provided in a conductive material; a driver including a diaphragm; a magnetic circuit including a permanent magnet; and an electric circuit including a voice coil to which current is applied based on an input electrical signal, and a first electric circuit configured to vibrate the driver based on the voice coil and a magnetic field formed by the magnetic circuit; wherein the diaphragm include a coating that is surface-coated with a conductive material so as to have a capacitance with the front housing.

Inventors

Yonghwan Hwang

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION

Dates

Publication Date: 20260512
Application Date: 20240612
Priority Date: 20211025

Claims (5)

1 . A speaker, comprising: a front housing including a conductive material, and disposed in front of the speaker; a driver including a diaphragm; a magnetic circuit including a permanent magnet; and an electric circuit including a voice coil to which current is applied based on an input electrical signal, and a first electric circuit configured to vibrate the driver based on the voice coil and a magnetic field formed by the magnetic circuit; wherein a surface of the diaphragm is coated with the conductive material so as to have a capacitance with the front housing, wherein the front housing is partitioned into at least two areas that are insulated from each other, and wherein the surface of the diaphragm is partitioned into at least two areas that are insulated from each other, so as to have a capacitance with each of the partitioned areas of the front housing.
2 . The speaker of claim 1 , wherein the electric circuit further comprises a second electric circuit including a first channel and a second channel connected to the front housing and the surface of the diaphragm, respectively, and capable of being connected to an external device.
3 . The speaker of claim 2 , wherein the driver further comprises a dust cap to prevent dust from entering the voice coil, and a surface of the dust cap is coated with the conductive material so as to have a capacitance with the front housing.
4 . The speaker of claim 1 , wherein the electric circuit further comprises a plurality of second electric circuits that are respectively connected to the partitioned areas of the front housing and the partitioned areas of the surface of the diaphragm and are connectable to an external device.
5 . The speaker of claim 4 , wherein the conductive material comprises at least one of gold, silver, copper, zinc, aluminum and an aluminum alloy.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a Divisional Patent Application of U.S. patent application Ser. No. 17/889,506, filed Aug. 17, 2022, which is based on and claims the benefit of priority to Korean Patent Application No. 10-2021-0143017, filed on Oct. 25, 2021 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. TECHNICAL FIELD The disclosure relates to a speaker, a speaker system, and a signal compensation method using the same, more particularly, relates to a speaker capable of improving audibility by compensating an output signal of the speaker, and a speaker system and a signal compensation method using the same. BACKGROUND In general, a speaker is a device that converts electrical voice signal current (electrical energy) into vibration energy to generate human audible voice or sound. In a conventional speaker, when a user operates an acoustic system, a voice signal current is input and the voice signal current is transmitted to a voice coil through a signal line. In this case, the voice coil has only up/down direction vibration force on the drawing due to influence of magnetic flux formed by a plate and a magnet, and the up/down direction vibration force is transmitted to a diaphragm, thereby vibrating the diaphragm. The vibration of the diaphragm is transmitted to the user through a medium (e.g., air), so that the user may hear sound. On the other hand, in the conventional sound system, a capacity of enclosure varies depending on a mounting position of a speaker, and thus spring constant of air affects performance of the speaker, leading to the predicted performance is not achieved and phenomenon in which nonlinearity is increased presents. To solve such a problem, a conventional speaker performance compensation method measures amount of current consumption of a speaker or mounts additionally a sensor on a diaphragm of a speaker. However, measuring the amount of current consumption is inferior in quality to measuring movement of the diaphragm because the current consumed varies according to characteristics of the change in impedance as the speaker operates based on an alternating current (AC) signal. Furthermore, additionally mounting of the sensor increase the cost burden. SUMMARY An aspect of the disclosure is to provide a speaker capable of identifying capacitance with a diaphragm using a conductive grill of a conventional speaker, and a speaker system and a signal compensation method using the same. Another aspect of the disclosure is to provide a speaker capable of compensating for an audio signal by identifying an error between an output signal and a measurement signal based on the identified capacitance, and speaker system and a signal compensation method using the same. Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure. In accordance with an aspect of the disclosure, a speaker includes a housing including a front housing including a conductive material; a driver including a diaphragm; a magnetic circuit including a permanent magnet; and an electric circuit including a voice coil to which current is applied based on an input electrical signal, and a first electric circuit configured to vibrate the driver based on the voice coil and a magnetic field formed by the magnetic circuit; wherein a surface of the diaphragm is coated with the conductive material so as to have a capacitance with the front housing. The electric circuit may further include a second electric circuit including a first channel and a second channel connected to the front housing and the surface of the diaphragm, respectively, and capable of being connected to an external device. The driver may further include a dust cap to prevent dust from entering the voice coil, and a surface of the dust cap may be coated with the conductive material so as to have a capacitance with the front housing. The front housing may be partitioned into at least two areas that are insulated from each other, and the surface of the diaphragm is partitioned into at least two areas that are insulated from each other, so as to have a capacitance with each of the partitioned areas of the front housing. The electric circuit may further include a plurality of second electric circuits that are respectively connected to the partitioned areas of the front housing and the partitioned areas of the surface of the diaphragm and are connectable to an external device. The conductive material may include at least one of gold, silver, copper, zinc, aluminum and an aluminum alloy. In accordance with another aspect of the disclosure, a speaker system includes a speaker including a diaphragm, a surface of the diaphragm being coated with a conductive material so as to have a capacitance with a front housing; and an amplifier; wherein the amplifier comprise