CN205071294U - Headphone structure circuit, earphone, audio output device and display device - Google Patents

Abstract

The utility model provides a headphone structure circuit, earphone, audio output device and display device. According to the utility model discloses a headphone structure circuit includes: detection module for detect the state of wearing of earphone, and export the detection data that are used for instructing the earphone state, and judge module for according to the detection data that come from detection module, judge whether the earphone is in the state of wearing to output is used for instructing whether the earphone is in the control signal of the state of wearing.

Description

Earphone control circuit, earphone, audio output device and display device

technical field

The utility model relates to electronic equipment, in particular to an earphone control circuit, an earphone, an audio output device, a display device, an earphone control method and an audio signal output mode switching method.

Background technique

Electronic devices such as televisions, laptop computers, tablet computers, portable mobile devices, etc. generally have a headphone jack. By detecting the plugging and unplugging of the earphone jack, it is judged whether an earphone is inserted into the earphone jack or whether the earphone is pulled out. These electronic devices output audio signals through speakers located on the electronic device when no earphone is plugged into the earphone jack. When an earphone is plugged into the earphone jack, these electronic devices output audio signals through the earphone.

Nowadays, with the popularity of thin electronic devices, the earphone jacks of these thin electronic devices are becoming smaller and smaller, making it increasingly difficult for current earphones to be inserted into the earphone jacks of these thin electronic devices. Moreover, the user needs to perform an insertion operation every time the earphone is used, and needs to perform a pull-out operation when the earphone is not needed, which brings great inconvenience to the use of the user.

Utility model content

In order to solve the above technical problems, the utility model proposes an earphone control circuit, an earphone including the earphone control circuit, an audio output device equipped with the earphone, a display device including the audio output device, an earphone control method and The audio signal output mode switching method.

This application proposes a headphone control circuit, including:

The detection module is used to detect the wearing state of the earphone, and output the detection data for indicating the state of the earphone; and the judgment module is used to judge whether the earphone is in the wearing state according to the detection data from the detection module, and output the detection data for indicating A control signal indicating whether the earphone is in a wearing state.

According to one embodiment, the detection module includes a three-axis acceleration sensor.

According to one embodiment, the detection module includes a temperature sensor or a pressure sensor.

According to one embodiment, the judging module includes an AD converter for converting the detection signal received from the detection module into a digital signal.

According to an embodiment, the judging module includes a control signal output unit configured to output a control signal indicating whether the earphone is in a wearing state.

According to an embodiment, the earphone control circuit further includes a switch module, configured to turn on/off the earphone control circuit. When the earphone control circuit is turned on, the judging module outputs a control signal indicating whether the earphone is in a wearing state. When the earphone control circuit is turned off, the judging module always outputs a control signal indicating that the earphone is in a wearing state.

The present application provides an earphone, comprising: an input module for receiving signals input from the outside; an output module for outputting audio signals; and the earphone control circuit as described in any one of the foregoing embodiments.

The present application provides an audio output device equipped with the earphone as described above, including: a power supply module; a control module, configured to output a switching signal according to a control signal from the earphone; an output module, configured to The output switching signal is for switching between the first audio output mode and the second audio output mode.

According to one embodiment, the first audio output mode is to output audio signals through a speaker, and the second audio output mode is to output audio signals through earphones.

According to one embodiment, the control module includes a switch circuit for outputting a switching signal indicating output of an audio signal through the speaker when the control signal from the earphone indicates the first audio output mode, and outputting a switching signal indicating the output of the audio signal through the speaker when the control signal from the earphone indicates the second audio output mode. In the output mode, a switching signal indicating output of the audio signal through the headphone is output.

The present application also provides a display device, including the aforementioned audio output device.

Optionally, the display device further includes an earphone detachably connected to the audio output device;

Wherein, the earphone is the aforementioned earphone.

The present application also provides a headset control method, including:

Detect the wearing status of the headset;

Output the detection data used to indicate the state of the earphone;

judging whether the earphone is in a wearing state according to the detection data; and

Outputting a control signal for indicating whether the earphone is in the wearing state, so that the audio output device that receives the control signal switches the audio output mode according to the control signal.

The present application also provides a method for switching audio signal output modes, including:

receiving a control signal sent by the earphone to indicate whether the earphone is in the wearing state;

The audio output mode is switched according to the control signal.

Optionally, switching the audio output mode according to the control signal specifically includes:

When the control signal is a control signal indicating that the earphone is not worn, it is determined that the current audio output mode is the first audio output mode in which the audio signal is output through the speaker;

When the control signal is a control signal indicating that the earphone is in the wearing state, it is determined that the current audio output mode is the second audio output mode for outputting audio signals through the earphone.

According to the earphone of the utility model, the audio output of the earphone and the speaker output of the audio output device can be switched between the audio output of the earphone and the speaker output of the audio output device in the state of being plugged in the audio output device all the time, without the need for plugging and unplugging operations like traditional earphones To realize the switching of the two output modes, thus avoiding the repeated plugging and unplugging operation of the earphones. This solves the problem that thin electronic devices are not easy to insert into the earphone. The utility model controls the output of the audio output device to the earphone and the loudspeaker according to detecting whether the user wears the earphone, thereby improving the convenience for the user.

Description of drawings

The above and other aspects, features and other advantages will be more clearly understood from the following detailed description in conjunction with the accompanying drawings, in which:

1 is a schematic diagram of an audio output device with a headphone jack;

Fig. 2 is a schematic block diagram of an earphone control circuit according to the present invention;

Fig. 3 is a schematic diagram of an earphone according to the present invention;

4 is a schematic diagram of an earphone plug of an earphone;

Fig. 5 is a schematic diagram of earphone types;

6 is a schematic diagram of an audio output device according to the present invention;

Fig. 7 is a flow chart of the earphone control method according to the present invention; and

Fig. 8 is a flow chart of the audio signal output mode switching method according to the present invention.

detailed description

The technical solutions in each embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

FIG. 1 is a schematic diagram of an audio output device with a headphone jack.

As shown in FIG. 1 , the audio output device includes a headphone jack 5 , a system-on-chip (SoC) circuit 1 , a power supply circuit 2 , an audio digital signal processing/amplification circuit 3 and a speaker circuit 4 . The audio output device detects whether the earphone jack 5 is plugged or unplugged. When an earphone is inserted into the earphone jack 5, the system-on-chip (SoC) circuit 1 of the audio output device outputs an audio signal to the earphone jack 5 according to the detection result indicating the earphone insertion (the earphone/speaker control signal) being high, And the output of the audio signal from the speaker circuit 4 is stopped. When the earphone is pulled out from the earphone jack 5, according to the detection result indicating that the earphone is pulled out (headphone/speaker control signal) is low, the system-on-chip (SoC) circuit 1 of the audio output device processes the audio signal through the audio digital signal The /amplifying circuit 3 outputs to the speaker circuit 4, and the output of the audio signal through the earphone jack 5 is stopped.

The user needs to insert the earphone every time when using the traditional audio output device, and needs to pull out the earphone when the earphone is not needed, which brings great inconvenience to the user. Moreover, with the popularization of thin electronic devices, the earphone jacks of audio output devices become smaller and smaller, making it increasingly difficult for current earphones to be inserted into the earphone jacks.

Fig. 2 is a schematic block diagram of an earphone control circuit according to the present invention. As shown in Figure 2, the earphone control circuit includes:

A detection module 21, configured to detect the wearing state of the earphone, and output detection data indicating the state of the earphone;

The judging module 22 is used to judge whether the earphone is currently in the wearing state according to the detection data from the detecting module, and output a control signal indicating whether the earphone is in the wearing state, that is, when it is judged that the earphone is in the wearing state, output the first A control signal, when it is judged that the earphone is not in the wearing state, a second control signal is output.

The detection module 21 includes a sensor for detecting data related to the wearing state of the earphone. Through the data detected by the detection module, it can be known whether the earphone is in the wearing state. The detection module 21 may include a three-axis acceleration sensor. Alternatively, the detection module 21 may also include a temperature sensor, a pressure sensor and the like.

When the detection module 21 includes a three-axis acceleration sensor, the three-axis acceleration sensor can adopt the forms of piezoresistive, piezoelectric and capacitive, etc., and the acceleration generated by it can be proportional to the change of resistance, voltage and capacitance respectively, and through corresponding Amplifying and filtering circuits for acquisition. Acceleration is a space vector. On the one hand, the three-axis acceleration sensor can be used to measure the components on the three coordinate axes to accurately understand the motion state of the object; Detection is performed when the direction of motion of the object is known. The three-axis acceleration sensor can accurately sense the movement of the earphone along with the user's head by detecting the components on the three coordinate axes of XYZ, so that data related to the wearing state of the earphone can be obtained. The three-axis acceleration sensor has the characteristics of small size and light weight, can measure spatial acceleration, and can fully and accurately reflect the motion properties of objects.

In addition, other forms of sensors can also be used to sense data related to the wearing state of the earphone. For example, the temperature around the earphone can be sensed by a temperature sensor. When it is close to the skin of the human body (or inserted into the ear hole), the temperature around the earphone will remain within a specific temperature range. For another example, when wearing a headset, a certain pressure is required to keep it on the user's head, so the pressure sensor can be used to sense data related to the wearing state of the headset.

Certainly, the detection module 21 may be equipped with different types of sensors at the same time, and a switch device may be configured to activate a certain sensor at a certain moment to detect whether the earphone is in the wearing state.

The judgment module 22 may include an AD converter 221 for converting the detection signal received from the detection module into a digital signal. The judging module may also include a control signal output unit 222, configured to output a control signal indicating whether the earphone is in a wearing state.

Taking the detection module 21 including a three-axis acceleration sensor as an example, the judgment module 22 can convert the components on the XYZ three coordinate axes from the three-axis acceleration sensor into digital signals through the AD converter 221, and compare the converted digital signals with the specific When the comparison result shows that the data sensed by the three-axis acceleration sensor indicates that the earphone is in the wearing state, the control signal output unit 222 can output a control signal indicating that the earphone is in the wearing state.

The earphone control circuit may also include a switch module 23 for turning on/off the earphone control circuit. When the earphone control circuit is turned on, the judging module 22 outputs a control signal indicating whether the earphone is in the wearing state. When the earphone control circuit is turned off, the judging module 22 always outputs a control signal indicating that the earphone is in the wearing state. When the user wears the earphone while lying down, the detection module 21 may not be able to detect whether the earphone is in the wearing state. At this time, the switch module 23 in the earphone control circuit is set to the closed state, and the earphone according to the utility model can be used as Ordinary headphones.

According to the earphone of the present invention, by detecting the actual wearing state of the earphone, and sending a control signal when the earphone is in the wearing state, the audio output device connected to the earphone is notified to output an audio signal through the earphone. In addition, when the earphone is not in the wearing state, the audio signal is still output through the speaker of the audio output device without pulling out the earphone from the audio output device. The difference between the earphone of the present invention and the prior art is that the output mode is switched by judging the plugging operation of the earphone to switching the output mode by judging the actual wearing state of the earphone, thereby avoiding repeated plugging and unplugging operations of the earphone.

Fig. 3 is a schematic diagram of an earphone according to the present invention. The earphone may include an input module for receiving signals input from an audio output device; an output module for outputting audio signals; and an earphone control circuit according to the present invention.

As an input module, the earphone can include an earphone plug inserted into the earphone jack of the audio output device, which can receive left and right channel audio signals (Left signal and Right signal), GND signal and power signal (VCC) from the audio output device. In addition, the earphone plug can also transmit the control signal (Control signal) output by the control signal output unit of the judgment module of the earphone control circuit to the audio output device.

As shown in FIG. 3 , the detection module of the earphone control circuit may include a three-axis acceleration sensor (3-axis acceleration sensor). The judging module may include an AD converter. The switch module may include a power switch and a power LED. When the power switch turns on the earphone control circuit, the power LED lights up, and the judging module outputs a control signal indicating whether the earphone is in the wearing state. When the power switch turns off the earphone control circuit, the power LED goes out, and the judging module always outputs a control signal indicating that the earphone is in the wearing state.

The mainstream earphone plug in the prior art is a 3-pole type, as shown in the earphone a in Figure 4, where the first contact (identification 1 in the attached drawing) is connected to the audio signal of the left channel, and the second contact (marked 1 in the attached drawing) The mark 2 in the figure) is connected to the audio signal of the right channel, and the third contact (mark 3 in the figure) is connected to the GND signal. The earphone plug can also be a 4-pole type with a MIC, as shown in earphone b in FIG. 4 . The 4-pole headphone plug can be divided into two types, one is CTIA (Cellular Telephone Industry Association), in which the first contact is connected to the left channel audio signal, the second contact is connected to the right channel audio signal, and the third contact is connected to the GND signal , the ④ contact (identification 4 in the figure) is connected to the MIC; the other is OMTP (OpenMobileTerminalPlatform), in which the ① contact is connected to the left channel audio signal, the ② contact is connected to the right channel audio signal, and the ③ The contact is connected to MIC, and the fourth contact is connected to GND signal.

Since it is necessary to output a control signal representing the wearing state of the earphone, the earphone plug of the earphone according to the present invention can be of a 5-pole type, such as the earphone c shown in Figure 4, wherein the first ① contact is connected to the left channel audio signal (Left signal), the ② contact is connected to the right channel audio signal (Right signal), the ③ contact is connected to the GND signal, the ④ contact outputs the control signal (Control signal), and the ⑤ contact (mark 5 in the figure) Connect the power signal (Vcc). The wiring of the above-mentioned 3-pole, 4-pole, and 5-pole earphone plugs is shown in Table 1.

Table 1: Wiring for 3-Pole, 4-Pole, 5-Pole Type Headphone Plugs

.

As can be seen from Table 1, the earphone according to the present invention can be compatible with earphone plugs of 3-pole type and 4-pole CTIA type in the prior art, but when using these earphone plugs in the prior art, it cannot output the signal indicating the earphone. The control signal of the wearing state, so it can only be used as an ordinary earphone.

The earphone according to the present invention can be a headphone a as shown in FIG. 5 ; it can also be an earphone b as shown in FIG. 5 .

Fig. 6 is a schematic diagram of an audio output device according to the present invention. The audio output device according to the utility model includes a 5-pole earphone jack, a system on chip, a power supply, an audio digital signal processing/amplifying circuit, a loudspeaker and a switch circuit.

As shown in FIG. 6 , the audio output device according to the present invention includes an earphone jack 65 , a system-on-chip (SoC) circuit 61 , a power supply circuit 62 , an audio digital signal processing/amplification circuit 63 , a speaker circuit 64 and a switch circuit 66 . The audio output device not only detects whether the earphone jack 65 is plugged or unplugged, but also receives a control signal from the earphone. When the earphone according to the present invention is inserted into the earphone jack 65, the audio output device receives the control signal from the earphone, and generates an earphone/speaker control signal according to the control signal indicating whether the earphone is in the wearing state. When the control signal from the earphone indicates that the earphone is in the wearing state, the switch circuit 66 is turned on, and the generated earphone/speaker control signal indicates that the audio signal is output through the earphone, and the system-on-chip (SoC) circuit 61 of the audio output device outputs the audio signal to the earphone jack 65, and stop the speaker circuit 64 from outputting the audio signal. When the control signal from the earphone indicates that the earphone is not in the wearing state, the switch circuit is turned off, and the generated earphone/speaker control signal indicates that the audio signal is output through the speaker, and the system-on-chip (SoC) circuit 61 of the audio output device passes the audio signal through the audio digital signal The processing/amplification circuit 63 outputs to the speaker circuit 64 , while the output of the audio signal through the earphone jack 65 is stopped.

According to the earphone of the present invention, by detecting the actual wearing state of the earphone, and sending a control signal when the earphone is in the wearing state, the audio output device connected to the earphone is notified to output an audio signal through the earphone. In addition, when the earphone is not in the wearing state, the audio signal is still output through the speaker of the audio output device without pulling out the earphone from the audio output device. According to the audio output device of the present invention, the output mode is switched by judging the plugging and unplugging operation of the earphone, and the output mode is switched by a control signal indicating the actual wearing state of the earphone, thereby avoiding repeated plugging and unplugging operations of the earphone, thus solving the problem of thinness The problem that the electronic device is not easy to be inserted into the earphone improves the convenience of the user.

In addition, when the system-on-chip (SoC) circuit 61 of the audio output device outputs a mute (Mute) signal, output of audio signals from the earphone and the speaker is stopped.

Fig. 7 is a flow chart of the earphone control method according to the present invention. As shown in Figure 7, the earphone control method includes: step 701, detecting the wearing state of the earphone; step 702, outputting detection data for indicating the state of the earphone; step 703, judging whether the earphone is in the wearing state according to the detection data; And step 704, outputting a control signal for indicating whether the earphone is in the wearing state.

In step 701, data related to the wearing state of the earphone may be detected by a sensor. The sensors may include triaxial acceleration sensors. Alternatively, the sensors may also include temperature sensors, pressure sensors and the like. In step 702, the sensor outputs data indicative of the wearing state of the headset. In step 703, it is judged whether the earphone is in the wearing state according to the data from the sensor. For example, it may be possible to determine whether the earphones are being worn by converting the data from the sensors into a digital signal and comparing the converted digital signal with data about a particular motion pattern. In step 704, according to the determination result in step 703, a control signal for indicating whether the earphone is in the wearing state is output.

Fig. 8 is a flow chart of the audio signal output mode switching method according to the present invention. As shown in Figure 8, the audio signal output mode switching method according to the present invention includes: step 801, receiving a control signal sent by the earphone to indicate whether the earphone is in the wearing state; and step 802, switching according to the control signal Audio output mode.

Specifically, the step of switching the audio output mode according to the control signal may include: when the control signal is a control signal indicating that the earphone is not worn, then determining that the current audio output mode is the first audio output mode in which the audio signal is output through the speaker mode; when the control signal is a control signal indicating that the earphone is in a wearing state, then determine that the current audio output mode is the second audio output mode for outputting audio signals through the earphone.

The display device according to the present invention comprises the audio output device according to the present invention. The display device according to the present invention may further include an earphone detachably connected to the audio output device, and the earphone is the earphone according to the present invention.

The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a TV, a monitor, a notebook computer, a digital photo frame, a navigator, etc., or it can be a display device such as a wearable display device, medical equipment, etc. panel. The display device according to the present invention especially includes thin display devices, because the earphone jacks of these thin display devices are becoming smaller and smaller, making it increasingly difficult for current earphones to be inserted into the earphone jacks of these thin display devices.

Apparently, those skilled in the art can make various modifications and variations to the embodiments of the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (12)

1. an earphone control circuit, is characterized in that, comprising:

Detection module, for the wearing state of Test earphone, and exports the detection data being used to indicate earphone state; And

Judge module, for according to the detection data carrying out self-detection module, judges whether described earphone is in wearing state, and output is used to indicate the control signal whether described earphone is in wearing state.

2. earphone control circuit as claimed in claim 1, is characterized in that,

Described detection module comprises 3-axis acceleration sensor.

3. earphone control circuit as claimed in claim 1, it is characterized in that, described detection module comprises temperature sensor or pressure sensor.

4. earphone control circuit as claimed in claim 1, it is characterized in that, described judge module comprises AD converter, for the detection signal received from described detection module is converted to digital signal.

5. earphone control circuit as claimed in claim 1, it is characterized in that, described judge module comprises control signal output unit, whether is in the control signal of wearing state for exporting the described earphone of instruction.

6. earphone control circuit as claimed in claim 1, is characterized in that, also comprise switch module, for earphone control circuit described in On/Off,

When opening described earphone control circuit, described judge module exports the control signal whether described earphone of instruction is in wearing state,

When closing described earphone control circuit, described judge module exports the control signal that the described earphone of instruction is in wearing state all the time.

7. an earphone, is characterized in that, comprising:

Input module, for receiving the signal from outside input;

Output module, for output audio signal; And

Earphone control circuit as described in claim arbitrary in claim 1-6.

8. an audio output device for earphone as claimed in claim 7 is installed, it is characterized in that, comprising:

Control module, for the control signal output switching signal of basis from described earphone;

Output module, for the switching signal exported according to described control module, switches between the first audio output mode and the second audio output mode.

9. audio output device as claimed in claim 8, it is characterized in that, described first audio output mode is by loud speaker output audio signal, and described second audio output mode is by earphone output audio signal.

10. audio output device as claimed in claim 9, it is characterized in that, described control module comprises switching circuit, for exporting the switching signal of instruction by loud speaker output audio signal when the control signal from earphone indicates the first audio output mode, and export the switching signal of instruction by earphone output audio signal when the control signal from earphone indicates the second audio output mode.

11. 1 kinds of display unit, is characterized in that, comprise the audio output device as described in claim arbitrary in claim 8-10.

12. display unit as claimed in claim 11, is characterized in that, comprise the earphone removably connected with described audio output device;

Wherein, described earphone is earphone according to claim 7.