WO2015117357A1 - 一种移动终端 - Google Patents

一种移动终端 Download PDF

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Publication number
WO2015117357A1
WO2015117357A1 PCT/CN2014/088667 CN2014088667W WO2015117357A1 WO 2015117357 A1 WO2015117357 A1 WO 2015117357A1 CN 2014088667 W CN2014088667 W CN 2014088667W WO 2015117357 A1 WO2015117357 A1 WO 2015117357A1
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WO
WIPO (PCT)
Prior art keywords
pin
output
speaker
earphone
mobile terminal
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Application number
PCT/CN2014/088667
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English (en)
French (fr)
Inventor
孙家训
Original Assignee
中兴通讯股份有限公司
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Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US15/328,492 priority Critical patent/US20170353799A1/en
Priority to EP14881598.8A priority patent/EP3177031A4/en
Priority to JP2017504760A priority patent/JP6425796B2/ja
Priority to KR1020177005610A priority patent/KR101868542B1/ko
Publication of WO2015117357A1 publication Critical patent/WO2015117357A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a mobile terminal.
  • the main factors affecting playback volume and sound quality are the performance of the speaker unit and the size of the speaker cavity. Because the sound power radiated by the speaker of the mobile terminal is relatively large, the volume of the speaker unit cannot be made small; at the same time, the volume of the speaker cavity has a great influence on the sound and sound quality of the external speaker, and the more regular the speaker cavity, the larger the cavity of the rear cavity The louder the part of the speaker plays, the better the sound quality will be. On the contrary, the smaller the back cavity of the speaker, the less the low-frequency component of the sound will be played, and the sound will be dry, monotonous and inactive.
  • the current smart mobile terminal market is increasingly advocating thin models, leaving less space for the speaker cavity, and there is not much room for sound quality to rely entirely on algorithmic enhancement. If you are pursuing good external sound quality, you will need a large speaker SPK volume and a high-performance speaker unit.
  • the thickness of the speaker unit commonly used in mobile terminals is generally 3.5 mm. Although the speaker unit manufacturers are constantly optimizing the thickness of the speaker, the minimum thickness has been above 2.5 mm so far. Such a thick speaker is placed in the mobile terminal housing, and it is necessary to have a certain front and rear cavity volume. Together with the thickness of the screen and the main board, it is very difficult to achieve ultra-thin.
  • the embodiment of the invention provides a mobile terminal for solving the problem that the external sound quality is relatively poor due to the small speaker cavity of the existing mobile terminal.
  • an embodiment of the present invention provides a mobile terminal, including a housing, the housing is provided with a headphone jack, and a compatible circuit connected to the headphone jack, the compatible electric
  • the road includes: an audio editing code, an analog switch, an application processor, and the earphone socket;
  • the earphone socket has an input pin and an output pin
  • the audio codec core is connected to an input pin of the earphone socket, and an external device inserted from the earphone socket is determined according to an impedance value measured from an input pin of the earphone socket, and the external device includes External speakers and headphones;
  • An output pin of the analog switch is connected to an output pin of the earphone socket, and an input pin of the analog switch is respectively connected to a speaker signal output pin and a headphone signal output pin of the audio codec;
  • the application processor is coupled to the audio codec and the analog switch, and when the external device is an external speaker, controlling the analog switch to input an input from a speaker signal output pin of the audio codec a signal is output from an output pin of the analog switch; when the external device is a headset, controlling the analog switch to output an input signal from a headphone signal output pin of the audio codec from an output of the analog switch Pin output.
  • the input pin of the earphone socket comprises: a MIC pin and a DET pin;
  • the audio codec includes: an HPdet pin and an HPmic pin;
  • the DET pin is connected to the HPdet pin, detecting an impedance value of an input pin of the earphone socket, determining an external device inserted from the earphone socket; the MIC pin and the HPmic pin connection.
  • the output pin of the earphone socket includes: a right channel pin and a left channel pin;
  • An output pin of the analog switch includes: a first output pin and a second output pin;
  • the first output pin is connected to the right channel pin, and the second output pin is connected to the left channel pin.
  • analog switch comprises: a control line pin
  • the control line pin is connected to a GPIO pin of the application processor
  • the application processor controls an input signal of the first analog signal input port and the second analog signal input port of the analog switch from the first analog signal output port by using a control line pin when the external device is an external speaker a second analog signal output port output;
  • the application processor controls the input signals of the third analog signal input port and the fourth analog signal input port of the analog switch from the first analog signal output port and the second through the control line pin when the external device is the earphone Analog signal output port output.
  • the first analog signal input port and the second analog signal input port of the analog switch are respectively connected to the SPKN pin and the SPKP pin of the audio codec;
  • the third analog signal input port and the fourth analog signal input port of the analog switch are respectively connected to the HPR pin and the HPL pin of the audio codec.
  • the mobile terminal further includes a power amplifier, two inputs of the power amplifier are respectively connected to an SPKN pin of the audio codec and an SPKP pin, and two outputs of the power amplifier are respectively associated with the analog
  • the first analog input port of the switch is connected to the second analog input port.
  • the earphone socket, the audio codec and the analog switch each have a grounding pin.
  • the external speaker comprises:
  • a speaker plug connected to the external speaker cabinet and the headphone jack on the housing.
  • the speaker plug includes: a first contact and a second contact, wherein the first contact is respectively connected to the left channel pin and the DET pin of the earphone socket; the second contact is respectively associated with the The right channel pin, MIC pin, and ground pin of the headphone jack are connected.
  • first contact and the second contact are connected by wires to two antennas of the external horn speaker.
  • the speaker plug is a two-stage plug, the first contact is located on a first segment of the speaker plug close to the earphone socket port, and the second contact is located on a second segment of the speaker plug away from the earphone socket port.
  • the mobile terminal determines whether the external device inserted into the earphone jack is an earphone or an external speaker according to the impedance value of the input pin of the earphone socket, thereby switching between the earphone playing mode and the external speaker playing mode. Achieve high-performance external release effects, increased external volume and user experience.
  • FIG. 3 is a flowchart of the operation of the embodiment of the present invention.
  • the embodiment of the present invention solves the problem that the sound quality of the external mobile terminal is relatively poor, and the sound quality of the external mobile phone is relatively poor.
  • the embodiment of the present invention provides a mobile terminal, including a housing, and the housing is provided with a headphone jack.
  • the mobile terminal also includes:
  • a headphone jack with input and output pins The input pins of the earphone socket include: MIC pin and DET pin, and the output pins of the earphone socket include: a right channel RIGHT pin, a left channel LEFT pin, and the earphone socket further includes a ground pin GND;
  • An audio codec (CODEC) chip connected to an input pin of the earphone socket, the audio codec chip determines an external device inserted into the earphone socket according to the impedance value of the input pin of the earphone socket, and the external device is an external speaker or an earphone, wherein
  • the audio codec chip includes: HPdet pin, HPmic pin, HPL pin, HPR pin, SPKP pin and SPKN pin;
  • the DET pin of the earphone socket detects the impedance value of the input pin of the earphone socket, determines the external device inserted into the earphone socket, and connects with the HPdet pin of the audio codec chip, and the earphone socket
  • the MIC pin is connected to the HPmic pin of the audio codec chip.
  • An application processor (AP) chip connected to an audio codec chip, specifically, an audio codec
  • the control signal and the data stream can be transmitted to each other through a bus connection with the application processor chip;
  • An analog switch chip connected to the application processor chip, the input pin of the analog switch chip includes four analog signal input ports IN1 to IN4, wherein: the first analog signal input port IN1 and the second analog signal input port IN2, respectively, and the audio The speaker signal output terminal SPKN of the codec chip is connected to the SPKP; the third analog signal input port IN3 and the fourth analog signal input port IN4 are respectively connected to the headphone signal output terminals HPR and HPL of the audio codec chip; the output of the analog switch chip
  • the pin includes: a first output pin OUT1 and a second output pin OUT2, respectively connected to an output pin of the earphone socket, optionally, the first output pin OUT1 is connected to a right channel RIGHT pin of the earphone socket, The second output pin OUT2 is connected to the left channel LEFT pin of the headphone jack.
  • the analog switch chip further includes a control line SELECT pin and is connected to the GPIO pin of the application processor chip through the SELECT pin.
  • the application processor chip controls the IN1 and IN2 of the analog switch chip to be connected to OUT1 and OUT2 respectively through the SELECT pin;
  • the application processor chip controls the IN3 and IN4 of the analog switch chip to be connected to OUT1 and OUT2 through the SELECT pin, respectively.
  • a power amplifier such as a high-performance class D speaker amplifier can be added between the IN1 and IN2 of the analog switch and the SPKP pin and the SPKN pin of the audio codec chip.
  • the compatible circuit of the embodiment of the present invention determines whether the external device inserted into the earphone jack is an earphone or an external speaker by checking the impedance value of the external device, thereby switching between the earphone playing mode and the external speaker playing mode, thereby achieving high performance. Put the effect.
  • the external speaker 1 includes: an external speaker 3; a speaker plug 2 connected to the external speaker 3 and the earphone jack on the mobile terminal housing;
  • the speaker plug 2 is a two-stage plug, and the speaker plug 2 includes two contacts of a first contact and a second contact, the first contact being located on the first segment of the speaker plug 2 near the earphone socket, and second The contact is located on the second section of the speaker plug 2 away from the earphone socket, and the two contacts are connected to the two antennas of the external speaker 3 through wires, thereby realizing the two touches of introducing the analog electric signal into the external speaker.
  • the foot driving the horn to work, produces sound.
  • the impedance value of the commonly used speaker of the mobile terminal is generally less than or equal to 8 ohms.
  • the speaker plug 2 of the external speaker 1 When the speaker plug 2 of the external speaker 1 is inserted into the earphone jack, the contact at the top of the speaker plug 2 and the DET pin of the earphone socket and the left channel LEFT The pin is connected, and the other contact of the speaker plug 2 is connected to the MIC pin of the headphone jack, the right channel RIGHT pin, and the ground GND pin. Since the DET pin of the headphone jack is connected to the HPdet pin of the audio codec chip, the resistance value detected by the HPdet pin of the CODEC chip is the resistance between the two contact pins of the speaker unit of the external speaker.
  • the CODEC chip can distinguish the external device inserted into the earphone jack from the external speaker according to the impedance value detected by the HPdet pin. headset.
  • FIG. 3 The workflow of the embodiment of the present invention is shown in FIG. 3, and the user inserts an external speaker or an earphone into the earphone jack;
  • the CODEC chip detects that a plug is inserted through the plugging action, and detects the ground impedance value of the earphone socket input pin DET pin through the HPdet pin;
  • the CODEC chip compares the impedance value detected by the HPdet pin with a preset threshold value to obtain a comparison result, assuming that the preset threshold value is 10 ohms;
  • the comparison result is that the impedance value is less than 10 ohms, it is determined that the external device inserted into the earphone jack is an external speaker, and when the comparison result is that the detected impedance value is greater than 10 ohms, it is determined that the external device inserted into the earphone jack is the earphone ;
  • the CODEC chip switches the sound signal to the speaker channel, that is, the sound signal is output from the SPKP pin of the CODEC chip and the SPKN pin, and the judgment result is fed back to the AP chip;
  • the external device of the headphone jack is a headphone, and the CODEC chip switches the sound signal to the headphone channel, that is, the sound signal is output from the HPL pin of the CODEC chip and the HPR pin, and the judgment result is fed back to the AP chip;
  • the AP chip controls the analog switch through the GPIO control line through the SELECT pin of the analog switch.
  • the OUT1 and OUT2 of the chip are respectively connected with IN1 and IN2.
  • the sound signal is converted by the analog switch chip and played out through the external speaker;
  • the AP The chip controls the OUT1 and OUT2 of the analog switch chip through the SELECT pin of the analog switch through the GPIO control line to connect with IN3 and IN4 respectively. At this time, the sound signal is converted by the analog switch chip and played through the earphone.
  • the mobile terminal of the embodiment of the present invention determines that the external device inserted into the earphone jack is an earphone or an external speaker by detecting an impedance value of an external device inserted into the earphone jack, thereby realizing a relationship between the earphone playing mode and the external speaker playing mode. Switching, achieving a high-performance external release effect, and improving the external volume.
  • a plurality of speaker cabinet cavities can be designed according to different mobile terminal shapes, so that the user has more choices.
  • the speaker unit can also be freely rotated and freely disassembled, free to choose the direction of sound propagation, enhancing the user experience.
  • the mobile terminal in the embodiment of the present invention can insert an external speaker into the earphone jack when the external release mode is required, and automatically switch to the vibration mode if the external release mode is not required.
  • the mobile terminal of the embodiment of the invention utilizes the existing earphone jack to realize the high-performance external release effect, and at the same time effectively avoids the limitation of the layout of the speaker and its cavity on the mobile terminal, and has strong use value and improves. user experience.
  • the mobile terminal of the embodiment of the present invention determines that the external device inserted into the earphone jack is an earphone or an external speaker by detecting an impedance value of an external device inserted into the earphone jack, thereby realizing a relationship between the earphone playing mode and the external speaker playing mode. Switching, achieving a high-performance external release effect, and improving the external volume.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Computational Linguistics (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic Arrangements (AREA)
  • Headphones And Earphones (AREA)
  • Stereophonic System (AREA)

Abstract

本发明实施例提供一种移动终端，解决现有移动终端喇叭腔体较小导致外放音质较差的问题。本发明实施例包括：与耳机插孔连接的兼容电路，兼容电路包括：具有输入引脚和输出引脚的耳机插座；与耳机插座输入引脚连接的音频编解码CODEC芯片，CODEC芯片根据耳机插座输入引脚的阻抗值，确定耳机插座插入的外部设备；与CODEC芯片连接的应用处理器AP芯片；与AP芯片连接的模拟开关芯片，其输出引脚与耳机插座的输出引脚连接，输入引脚分别连接CODEC芯片的扬声器信号输出引脚及耳机信号输出引脚；AP芯片控制模拟开关芯片，在外部设备为外置扬声器时，CODEC输出的扬声器输出信号从模拟开关的输出端口输出；在外部设备为耳机时，CODEC输出的耳机信号从模拟开关的输出端口输出。本发明实施例可进行耳机和外置扬声器之间的切换，具有高性能外放效果。

Description

一种移动终端 技术领域
本发明涉及通信技术领域，特别是涉及一种移动终端。
背景技术
随着科技的飞速发展，使用移动终端播放音乐和电影，已经成为人们日常生活很重要的娱乐消遣方式。用户对移动终端功能，特别是外放声音音量和音质方面的要求也越来越高。
对于移动终端而言，影响播放音量和音质的主要因素在于喇叭单体的性能和扬声器音腔的大小。由于移动终端扬声器辐射的声功率比较大，喇叭单体体积不可能做到很小；同时，喇叭腔体体积对外放的声音响度和音质影响巨大，喇叭腔体越规则，后腔腔体越大，喇叭播放低频部分声音越丰富，音质相对就会越好；反之，喇叭的后腔腔体越小，播放的声音低频成分就会越少，声音就会比较干涩、单调、没力度。
与之相矛盾的是，现在的智能移动终端市场越来越崇尚薄款，留给喇叭腔体的空间也越来越少，声音音质完全依靠算法提升已没有多少空间。如果追求良好的外放音质，势必需要大的扬声器SPK音腔体积和高性能的喇叭单体。目前移动终端常用的喇叭单体厚度一般为3.5mm，虽然喇叭单体厂家也在不断优化喇叭厚度，但目前为止此厚度最低也都在2.5mm以上。这么厚的喇叭放在移动终端壳体内，还需要有一定的前后腔体积，再加上屏和主板的厚度，要想做到超薄，势必非常困难。
发明内容
本发明实施例提供一种移动终端，用以解决由于现有移动终端喇叭腔体较小导致外放音质相对较差的问题。
为了实现上述目的，本发明实施例提供了一种移动终端，包括壳体，所述壳体上设有耳机插座，以及与所述耳机插座连接的兼容电路，所述兼容电 路包括：音频编辑码器，模拟开关，应用处理器，以及所述耳机插座；其中，
所述耳机插座具有输入引脚和输出引脚；
所述音频编解码芯器与所述耳机插座的输入引脚相连，根据从所述耳机插座的输入引脚测得的阻抗值，确定从所述耳机插座插入的外部设备，所述外部设备包括外置扬声器和耳机；
所述模拟开关的输出引脚与所述耳机插座的输出引脚连接，所述模拟开关的输入引脚分别与所述音频编解码器的扬声器信号输出引脚和耳机信号输出引脚相连接；
所述应用处理器连接所述音频编解码器和所述模拟开关，在所述外部设备为外置扬声器时，控制所述模拟开关将来自所述音频编解码器的扬声器信号输出引脚的输入信号从所述模拟开关的输出引脚输出；在所述外部设备为耳机时，控制所述模拟开关将来自所述音频编解码器的耳机信号输出引脚的输入信号从所述模拟开关的输出引脚输出。
其中，所述耳机插座的输入引脚包括：MIC引脚、DET引脚；
所述音频编解码器包括：HPdet引脚以及HPmic引脚；
其中，所述DET引脚与所述HPdet引脚连接，检测所述耳机插座的输入引脚的阻抗值，确定从所述耳机插座插入的外部设备；所述MIC引脚与所述HPmic引脚连接。
其中，所述耳机插座的输出引脚包括：右声道引脚、左声道引脚；
所述模拟开关的输出引脚包括：第一输出引脚以及第二输出引脚；
其中，所述第一输出引脚与所述右声道引脚连接，第二输出引脚与所述左声道引脚连接。
其中，所述模拟开关包括：控制线引脚；
所述控制线引脚与所述应用处理器的GPIO引脚相连接；
所述应用处理器在外部设备为外置扬声器时，通过控制线引脚控制所述模拟开关的第一模拟信号输入端口和第二模拟信号输入端口的输入信号分别从第一模拟信号输出端口和第二模拟信号输出端口输出；
所述应用处理器在外部设备为耳机时，通过控制线引脚控制所述模拟开关的第三模拟信号输入端口和第四模拟信号输入端口的输入信号分别从第一模拟信号输出端口和第二模拟信号输出端口输出。
其中，所述模拟开关的第一模拟信号输入端口和第二模拟信号输入端口分别与所述音频编解码器的SPKN引脚和SPKP引脚连接；
所述模拟开关的第三模拟信号输入端口和第四模拟信号输入端口分别与所述音频编解码器的HPR引脚和HPL引脚连接。
所述移动终端还包括功率放大器，所述功率放大器的两个输入端分别与所述音频编解码器的SPKN引脚以及SPKP引脚连接，所述功率放大器的两个输出端分别与所述模拟开关的第一模拟输入端口和第二模拟输入端口相连接。
其中，所述耳机插座、所述音频编解码器以及所述模拟开关均具有一接地引脚。
其中，所述外置扬声器包括：
外置喇叭音箱；
与所述外置喇叭音箱及所述壳体上的耳机插孔连接的音箱插头。
其中，所述音箱插头包括：第一触点和第二触点，其中，第一触点分别与所述耳机插座的左声道引脚和DET引脚连接；第二触点分别与所述耳机插座的右声道引脚、MIC引脚以及接地引脚相连。
其中，所述第一触点和所述第二触点通过导线与所述外置喇叭音箱的两个触角连接。
其中，所述音箱插头为二段式插头，所述第一触点位于音箱插头靠近耳机插座端口的第一段上，所述第二触点位于音箱插头远离耳机插座端口的第二段上。
本发明实施例具有以下有益效果：
本发明实施例的移动终端，根据耳机插座的输入引脚的阻抗值，确定耳机插孔插入的外部设备是耳机还是外置扬声器，从而进行耳机播放模式和外置扬声器播放模式之间的切换，实现了高性能外放效果，提高了外放音量和 用户体验。
附图概述
图1为本发明实施例的兼容电路图；
图2为本发明实施例外置扬声器的结构图；
图3为本发明实施例的工作流程图。
附图标记说明：
1-外置扬声器，2-音箱插头，3-外置喇叭音箱。
本发明的较佳实施方式
为使本发明实施例解决的技术问题、技术方案和优点更加清楚，下面将结合具体实施例及附图进行详细描述。
本发明实施例解决由于现有移动终端喇叭腔体较小导致外放音质相对较差的问题，本发明实施例提供了一种移动终端，包括壳体，壳体上设有耳机插孔，该移动终端还包括：
与耳机插孔连接的兼容电路，其中，如图1所示，兼容电路包括：
具有输入引脚和输出引脚的耳机插座。耳机插座的输入引脚包括：MIC引脚、DET引脚，耳机插座的输出引脚包括：右声道RIGHT引脚、左声道LEFT引脚，耳机插座还包括一接地引脚GND；
与耳机插座的输入引脚连接的音频编解码(CODEC)芯片，音频编解码芯片根据耳机插座的输入引脚的阻抗值，确定耳机插座插入的外部设备，外部设备为外置扬声器或者耳机，其中，音频编解码芯片包括：HPdet引脚、HPmic引脚、HPL引脚、HPR引脚、SPKP引脚以及SPKN引脚；
在本发明的具体实施例中，耳机插座的DET引脚检测耳机插座的输入引脚的阻抗值，确定耳机插座插入的外部设备，并与音频编解码芯片的HPdet引脚与连接，耳机插座的MIC引脚与音频编解码芯片的HPmic引脚连接。
与音频编解码芯片连接的应用处理器(AP)芯片，具体地，音频编解码 与应用处理器芯片之间通过总线连接，可以相互传输控制信号和数据流；
与应用处理器芯片连接的模拟开关芯片，模拟开关芯片的输入引脚包括四个模拟信号输入端口IN1～IN4，其中：第一模拟信号输入端口IN1和第二模拟信号输入端口IN2，分别与音频编解码芯片的扬声器信号输出端SPKN和SPKP相连；第三模拟信号输入端口IN3和第四模拟信号输入端口IN4，分别与音频编解码芯片的耳机信号输出端HPR和HPL相连；模拟开关芯片的输出引脚包括：第一输出引脚OUT1以及第二输出引脚OUT2，分别与耳机插座的输出引脚连接，可选地，第一输出引脚OUT1与耳机插座的右声道RIGHT引脚连接，第二输出引脚OUT2与耳机插座的左声道LEFT引脚连接。
在本发明的具体实施例中，模拟开关芯片还包括控制线SELECT引脚，并通过SELECT引脚与应用处理器芯片的GPIO引脚连接。应用处理器芯片在外部设备为外置扬声器时，通过SELECT引脚控制模拟开关芯片的IN1和IN2分别与OUT1和OUT2接通；
应用处理器芯片在外部设备为耳机时，通过SELECT引脚控制模拟开关芯片的IN3和IN4分别与OUT1和OUT2接通。
另外，在本发明的具体实施例中，还可以在模拟开关的IN1和IN2与音频编解码芯片的SPKP引脚和SPKN引脚之间增加一功率放大器，如高性能D类喇叭功放。
本发明实施例的兼容电路通过检查外部设备的阻抗值，确定插入耳机插孔的外部设备为耳机还是外置扬声器，从而进行耳机播放模式和外置扬声器播放模式之间的切换，实现高性能外放效果。
下面举例说明本发明实施例的工作原理。
在本发明的具体实施例中，如图2所示，外置扬声器1包括：外置喇叭音箱3；与外置喇叭音箱3及移动终端壳体上的耳机插孔连接的音箱插头2；可选地，音箱插头2为二段式插头，且音箱插头2包括第一触点和第二触点两个触点，第一触点位于音箱插头2靠近耳机插座的第一段上，第二触点位于音箱插头2远离耳机插座的第二段上，两个触点通过导线与外置喇叭音箱3的两个触角连接，从而实现将声音模拟电信号引入外置喇叭音箱的两个触 脚，驱动喇叭工作，产生声音。
目前移动终端常用喇叭的阻抗值一般都小于或等于8欧姆，当外置扬声器1的音箱插头2插入耳机插孔后，音箱插头2顶端的触点与耳机插座的DET引脚以及左声道LEFT引脚连接，音箱插头2的另一个触点与耳机插座的MIC引脚、右声道RIGHT引脚以及接地GND引脚相连。由于耳机插座的DET引脚与音频编解码芯片的HPdet引脚连接,，因此，CODEC芯片的HPdet引脚检测到的电阻值即为外置喇叭音箱中喇叭单体两个触脚之间的电阻值或耳机左声道的阻抗；如果是外置喇叭音箱，则为喇叭单体两个触脚之间的电阻值即喇叭单体的对地阻抗值，且阻抗值小于等于8欧姆，如果是耳机，其左右声道的对地阻抗一般为32欧姆，最小不低于16欧姆，因此CODEC芯片可以根据HPdet管脚检测到的阻抗值，来分辨插入耳机插孔的外部设备是外置扬声器还是耳机。
本发明实施例的工作流程如图3所示，用户将外置扬声器或者耳机插入到耳机插孔；
CODEC芯片通过插拔动作检测到有插头插入，并通过HPdet引脚检测出耳机插座输入引脚DET引脚的对地阻抗值；
CODEC芯片将HPdet引脚检测到的阻抗值与预设阀值进行比较，得出一比较结果，假定预设阀值为10欧姆；
当比较结果为阻抗值小于10欧姆时，则判定插入耳机插孔的外部设备为外置扬声器，当比较结果为检测到的阻抗值大于10欧姆时，则判定插入耳机插孔的外部设备是耳机；
若插入耳机插孔的外部设备为外置扬声器，CODEC芯片将声音信号切换到扬声器通道即声音信号从CODEC芯片的SPKP引脚以及SPKN引脚输出，并同时将判定结果反馈给AP芯片；若插入耳机插孔的外部设备为耳机，CODEC芯片则将声音信号切换到耳机通道即声音信号从CODEC芯片的HPL引脚以及HPR引脚输出，同时将判定结果反馈给AP芯片；
当CODEC芯片反馈的判断结果为插入耳机插孔的外部设备为外置扬声器时，AP芯片则通过GPIO控制线经模拟开关的SELECT引脚控制模拟开关 芯片的OUT1和OUT2分别与IN1和IN2连接，此时，声音信号经过模拟开关芯片转换，通过外置扬声器播放出来；当CODEC芯片反馈的判断结果为插入耳机插孔的外部设备为耳机时，AP芯片则通过GPIO控制线经模拟开关的SELECT引脚控制模拟开关芯片的OUT1和OUT2分别与IN3和IN4连接，此时，声音信号经过模拟开关芯片转换，通过耳机播放出来。
本发明实施例的移动终端，通过检测插入耳机插孔的外部设备的阻抗值，判断插入耳机插孔的外部设备为耳机或者外置扬声器，从而实现耳机播放模式和外置扬声器播放模式之间的切换，实现了高性能外放效果，提高了外放音量。
在本发明的具体实施例中，可以根据不同的移动终端外形设计多款喇叭音箱腔体，让用户有更多的选择。同时，喇叭音箱单体还可以自由旋转和自由拆卸，能够自由选择声音的传播方向，增强了用户体验。
本发明实施例的移动终端，在需要外放模式时，将外置扬声器插入耳机插孔即可，若不需要外放模式，则自动切换为震动模式。
本发明实施例的移动终端，利用已有的耳机插孔，实现高性能外放效果，同时，有效规避了喇叭及其腔体在移动终端上布局的局限，具有很强的使用价值，提升了用户体验。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
本发明实施例的移动终端，通过检测插入耳机插孔的外部设备的阻抗值，判断插入耳机插孔的外部设备为耳机或者外置扬声器，从而实现耳机播放模式和外置扬声器播放模式之间的切换，实现了高性能外放效果，提高了外放音量。

Claims (11)

  1. 一种移动终端，包括壳体，所述壳体上设有耳机插座，以及与所述耳机插座连接的兼容电路，所述兼容电路包括：音频编解码器，模拟开关，应用处理器以及所述耳机插座；其中，所述耳机插座具有输入引脚和输出引脚；
    所述音频编解码器与所述耳机插座的输入引脚相连，根据从所述耳机插座的输入引脚测得的阻抗值，确定从所述耳机插座插入的外部设备；所述外部设备包括外置扬声器和耳机；
    所述模拟开关的输出引脚与所述耳机插座的输出引脚连接，所述模拟开关的输入引脚分别与所述音频编解码器的扬声器信号输出引脚和耳机信号输出引脚相连接；
    所述应用处理器连接所述音频编解码器和所述模拟开关，当所述外部设备为外置扬声器时，控制所述模拟开关将来自所述音频编解码器的扬声器信号输出引脚的输入信号从所述模拟开关的输出引脚输出；当所述外部设备为耳机时，控制所述模拟开关将来自所述音频编解码器的耳机信号输出引脚的输入信号从所述模拟开关的输出引脚输出。
  2. 根据权利要求1所述的移动终端，其中，所述耳机插座的输入引脚包括MIC引脚和DET引脚；所述音频编解码器的输入引脚包括HPdet引脚和HPmic引脚；
    其中，所述HPdet引脚与所述DET引脚相连，检测所述耳机插座的输入引脚的阻抗值，确定从所述耳机插座插入的外部设备；所述MIC引脚与所述HPmic引脚连接。
  3. 根据权利要求1所述的移动终端，其中，
    所述耳机插座的输出引脚包括右声道引脚和左声道引脚；
    所述模拟开关的输出引脚包括第一输出引脚和第二输出引脚；
    其中，所述第一输出引脚与所述右声道引脚连接，第二输出引脚与所述左声道引脚连接。
  4. 根据权利要求1所述的移动终端，其中，所述模拟开关包括：
    控制线引脚，所述控制线引脚与所述应用处理器的GPIO引脚相连接；
    所述应用处理器在外部设备为外置扬声器时，通过所述控制线引脚控制所述模拟开关的第一模拟信号输入端口和第二模拟信号输入端口的输入信号分别从第一模拟信号输出端口和第二模拟信号输出端口输出；
    所述应用处理器在外部设备为耳机时，通过所述控制线引脚控制所述模拟开关的第三模拟信号输入端口和第四模拟信号输入端口的输入信号分别从所述第一模拟信号输出端口和第二模拟信号输出端口输出。
  5. 根据权利要求4所述的移动终端，其中，
    所述模拟开关的第一模拟信号输入端口和第二模拟信号输入端口分别与所述音频编解码器的SPKN引脚和SPKP引脚连接；
    所述模拟开关的第三模拟信号输入端口和第四模拟信号输入端口分别与所述音频编解码器的HPR引脚和HPL引脚连接。
  6. 根据权利要求5所述的移动终端，还包括功率放大器，所述功率放大器的两个输入端分别与所述音频编解码器的SPKN引脚以及SPKP引脚连接，所述功率放大器的两个输出端分别与所述模拟开关的第一模拟输入端口和第二模拟输入端口相连接。
  7. 根据权利要求1所述的移动终端，其中，所述耳机插座、所述音频编解码器和所述模拟开关分别具有一接地引脚。
  8. 根据权利要求1所述的移动终端，其中，所述外置扬声器包括：
    外置喇叭音箱；
    与所述外置喇叭音箱及所述壳体上的耳机插孔连接的音箱插头。
  9. 根据权利要求8所述的移动终端，其中，所述音箱插头包括：第一触点和第二触点，其中，第一触点分别与所述耳机插座的左声道引脚和DET引脚连接；第二触点分别与所述耳机插座的右声道引脚、MIC引脚以及接地引脚相连。
  10. 根据权利要求9所述的移动终端，其中，所述第一触点和所述第二 触点通过导线与所述外置喇叭音箱的两个触角连接。
  11. 根据权利要求8所述的移动终端，其中，所述音箱插头为二段式插头，所述第一触点位于音箱插头靠近耳机插座端口的第一段上，所述第二触点位于音箱插头远离耳机插座端口的第二段上。
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JP2017529734A (ja) 2017-10-05
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KR101868542B1 (ko) 2018-06-19
CN204069063U (zh) 2014-12-31
KR20170039254A (ko) 2017-04-10
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