CN215420692U

CN215420692U - True wireless earphone with high-performance audio output

Info

Publication number: CN215420692U
Application number: CN202121633415.4U
Authority: CN
Inventors: 母朝虎; 郑瀚鹏
Original assignee: Chengdu Shuiyueyu Technology Co ltd
Current assignee: Chengdu Shuiyueyu Technology Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-01-04
Anticipated expiration: 2031-07-16

Abstract

The utility model discloses a real wireless earphone with high-performance audio output, which comprises an audio output module and an electroacoustic transducer connected with the audio output module, wherein an amplifier is differentially connected between the audio output module and the electroacoustic transducer. The amplifier is connected between the audio output module and the electroacoustic transducer in a differential mode, so that the output performance of the audio output module is obviously improved, the electroacoustic transducer obtains lower nonlinear distortion and a larger dynamic range, and meanwhile, the acoustic coupling structure used by the utility model can obviously eliminate the high-pitch resonance peak of the in-ear earphone, and the structure is simple and low in implementation difficulty.

Description

True wireless earphone with high-performance audio output

Technical Field

The present invention relates to a true wireless headset, and more particularly, to a true wireless headset having high performance audio output.

Background

The real Wireless earphone is a product concept emerging in recent years, namely, the English name of more Wireless Stereo, which is called TWS (hereinafter, the real Wireless earphone is collectively called TWS). TWS is a stereo headphone in which a left channel, a right channel, and a transmitting terminal (a mobile phone or a PC) are wirelessly connected, and is generally equipped with a single charging box for both charging and storing functions. The left and right independent earphones of the TWS are internally provided with electroacoustic transducer units, antennas, circuit boards and batteries, wherein the circuit boards comprise a wireless control integrated audio output IC, a power management IC and a control IC. The charging box is provided with a power management circuit board and a battery with larger capacity, and the charging box is connected with the earphone through a charging contact.

In terms of sound quality, the dynamic range exerted by the electroacoustic transducer unit is positively correlated with the output voltage and output power provided by the audio circuit to the electroacoustic transducer unit, so that poor audio output performance is usually a main factor that restricts the sound quality of the wireless headset. In addition, the existing in-ear earphone usually generates high-pitch resonance peak, which causes certain harm to human body.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a real wireless earphone with high performance audio output, which has the advantages of excellent sound quality and capability of significantly eliminating high pitch resonance peaks.

The technical scheme of the utility model is as follows: a true wireless earphone with high-performance audio output comprises an audio output module and an electroacoustic transducer connected with the audio output module, wherein an amplifier is connected between the audio output module and the electroacoustic transducer in a differential mode.

The working principle of the utility model is as follows: when the real wireless earphone works, the amplifier is connected between the audio output module of the real wireless earphone and the electroacoustic transducer in a differential mode, so that the output power of the audio output module is obviously improved, an audio signal with lower distortion and higher power is output, the input voltage supplied to the electroacoustic transducer is improved, and the electroacoustic transducer is driven to obtain lower nonlinear distortion and a larger dynamic range.

Compared with the prior art, the utility model obviously improves the output performance of the audio output module by differentially connecting the amplifier between the audio output module and the electroacoustic transducer, so that the electroacoustic transducer obtains lower nonlinear distortion and larger dynamic range.

In a further aspect, the amplifier is a dual channel class G amplifier.

By setting the amplifier as a dual-channel class-G amplifier, the output power amplification efficiency of the audio output module is obviously improved.

In a further technical solution, the audio output module is disposed in an independent audio output IC.

For a non-integrated true wireless earphone which comprises an electroacoustic transducer unit, an antenna, and a circuit board and a battery which comprise a wireless control integrated audio output IC and a power management IC as well as a control IC, the utility model is also suitable for the non-integrated true wireless earphone and has wide application range.

In a further technical solution, the audio output module is disposed in an integrated wireless control IC.

For the integrated true wireless earphone, the wireless control IC built in the earphone usually integrates the main control module, the decoding module, the digital-to-analog conversion module and the audio amplification module, the audio output of the wireless control IC is directly connected with the electroacoustic transducer unit to generate sound, and most of the existing earphones are the integrated true wireless earphone, so that the practicability is obviously improved.

The utility model has the beneficial effects that:

1. compared with the prior art, the amplifier is connected between the audio output module and the electroacoustic transducer in a differential mode, so that the output performance of the audio output module is obviously improved, the electroacoustic transducer obtains lower nonlinear distortion and a larger dynamic range, and meanwhile, the acoustic coupling structure used by the utility model can obviously eliminate the high-pitch resonance peak of the in-ear earphone, and is simple in structure and low in implementation difficulty;

2. the amplifier is set to be a dual-channel G-type amplifier, so that the output power amplification efficiency of the audio output module is obviously improved;

3. for a non-integrated true wireless earphone which comprises an electroacoustic transducer unit, an antenna, a circuit board and a battery, wherein the circuit board and the battery comprise a wireless control integrated audio output IC (integrated circuit), a power management IC (integrated circuit) and a control IC (integrated circuit), the utility model is also suitable for the non-integrated true wireless earphone and has wide application range;

4. for the integrated true wireless earphone, the wireless control IC built in the earphone usually integrates the main control module, the decoding module, the digital-to-analog conversion module and the audio amplification module, the audio output of the wireless control IC is directly connected with the electroacoustic transducer unit to generate sound, and most of the existing earphones are the integrated true wireless earphone, so that the practicability is obviously improved.

Drawings

Fig. 1 is a schematic diagram of a design of a true wireless headset with high performance audio output according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings.

Example (b):

as shown in fig. 1, a true wireless earphone with high performance audio output includes an audio output module and an electroacoustic transducer connected with the audio output module, and an amplifier is differentially connected between the audio output module and the electroacoustic transducer. Here, the audio output module may be a single audio output IC, or may be an audio output unit in the wireless control IC, but the present invention is not limited thereto.

In further embodiments, the amplifier is a two-channel class G amplifier. For example, the class G amplifier chip may be TPA 6140. By setting the amplifier as a dual-channel class-G amplifier, the output power amplification efficiency of the audio output module is obviously improved.

In further embodiments, the audio output module is disposed in a separate audio output IC. For a non-integrated true wireless earphone which comprises an electroacoustic transducer unit, an antenna, and a circuit board and a battery which comprise a wireless control integrated audio output IC and a power management IC as well as a control IC, the utility model is also suitable for the non-integrated true wireless earphone and has wide application range.

In further embodiments, the audio output module is disposed in an integrated wireless control IC. For example, the audio master may be a high-pass QCC-series IC. For example, as shown in fig. 1, the wireless control IC is connected to an input 5V power supply, a contact and a touch chip set, pulse width modulation of LED state, an external crystal oscillator, a 4.2V lithium battery and a lithium ion protection chip set, a 2.4G filter band and a 2.4G antenna, an input micro-electromechanical microphone, and an audio output connected thereto are connected to an amplifier and a speaker in sequence, and the wireless control IC supplies power to the amplifier and is connected to the amplifier through I2C control communication. For the integrated true wireless earphone, the wireless control IC built in the earphone usually integrates the main control module, the decoding module, the digital-to-analog conversion module and the audio amplification module, the audio output of the wireless control IC is directly connected with the electroacoustic transducer unit to generate sound, and most of the existing earphones are the integrated true wireless earphone, so that the practicability is obviously improved.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A true wireless earphone with high-performance audio output comprises an audio output module and an electroacoustic transducer connected with the audio output module, and is characterized in that an amplifier is differentially connected between the audio output module and the electroacoustic transducer.

2. A true wireless earphone with high performance audio output according to claim 1, wherein the amplifier is a dual channel class G amplifier.

3. The truly wireless headset with high performance audio output of claim 1, wherein the audio output module is provided in a separate audio output IC.

4. The truly wireless headset with high-performance audio output according to claim 1, wherein the audio output module is disposed in an integrated wireless control IC.