Power regulation circuit of earphone, power supply circuit and earphone

Abstract

The invention provides a power regulation circuit of an earphone, a power supply circuit and the earphone. A detection module is used for outputting a first signal or a second signal according to a power supply battery of an accessed earphone; the power supply module outputs an electric signal of a first level according to the first signal or outputs an electric signal of a second level according to the second signal; the power amplifier module works in a first power mode according to the first level, so that the player works in a first playing mode; or the player works in a second power mode according to the second level, so that the player works in a second playing mode. Wherein the electric quantity of the power supply battery is positively correlated with the output power of the power amplifier module. According to the application, the output level can be adjusted according to the electric quantity of the power supply battery, and then the output power is adjusted, so that the player works in the first playing mode when the electric quantity is relatively large, and works in the second playing mode when the electric quantity is relatively small, thereby realizing balance of endurance and high performance.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a power regulation circuit, a power supply circuit and a headset. Background Art

[0002] In today's pursuit of quality, convenience and experience, TWS (True Wireless Stereo) wireless headphones have become a popular electronic product in recent years. Compared with traditional headphones, TWS wireless headphones use Bluetooth technology to transmit voice data, greatly improving voice quality, and their battery life and wearing comfort have been significantly improved.

[0003] In order to further improve the user experience, the size of TWS wireless headphones is getting smaller and smaller, which makes the matching headphone battery also face the problem of reduced capacity, which will reduce the use time of the headphones and affect the customer experience. Therefore, in order to extend the battery life of the headphones as much as possible without changing the battery capacity, engineers have to use methods such as modifying audio parameters to reduce power consumption and thus extend the use time of the headphones. This will bring about problems such as poor sound quality of TWS wireless headphones, which also affects the customer experience. Summary of the invention

[0004] The present application provides a power regulation circuit, a power supply circuit and a headset for solving the problems in the prior art.

[0005] In a first aspect, the present application provides a power regulation circuit for headphones, comprising: a detection module, a power supply module and a power amplifier module;

[0006] The input end of the detection module is connected to the power supply battery of the headset, and is used to output the first signal or the second signal according to the connected power supply battery;

[0007] The power supply module is connected to the detection module and is used to output an electrical signal of a first level according to the first signal, or to output an electrical signal of a second level according to the second signal;

[0008] The power amplifier module is connected to the player of the headset and is used to operate in a first power mode according to the first level so that the player operates in a first play mode; or to operate in a second power mode according to the second level so that the player operates in a second play mode;

[0009] The power level of the power supply battery is positively correlated with the output power of the power amplifier module.

[0010] In one embodiment, the detection module outputs the first signal or the second signal according to the connected power supply battery, including:

[0011] The detection module compares the output level of the power supply battery with a preset threshold;

[0012] When the output level of the power supply battery is greater than or equal to the preset threshold, outputting a first signal;

[0013] When the output level of the power supply battery is less than the preset threshold, a second signal is output.

[0014] In one of the embodiments, the detection module includes a comparison unit and a signal generation unit;

[0015] The comparison unit is used to compare the output level of the power supply battery with the preset threshold;

[0016] The signal generating unit is used to output a first signal when the output level of the power supply battery is greater than or equal to the preset threshold; and to output a second signal when the output level of the power supply battery is less than the preset threshold.

[0017] In one of the embodiments, the comparison unit includes a first switching device, and the signal generating unit includes a second power supply and a second switching device;

[0018] The trigger end of the first switch device is connected to the power supply battery, and the output end is connected to the trigger end of the second switch device; the input end of the second switch device is connected to the second power supply, and the output end is connected to the power supply module;

[0019] The first switch device is turned on when the output level of the power supply battery is greater than or equal to the preset threshold value, so that the second switch device outputs the second power supply to the power supply module after being turned on;

[0020] The first switch device is turned off when the output level of the power supply battery is less than the preset threshold value, so that the second switch device outputs a low level to the power supply module after being turned off.

[0021] In one of the embodiments, the detection module further includes an adjustment unit;

[0022] The regulating unit is connected in series between the power supply battery and the input end of the comparing unit, and is used to regulate the value of the preset threshold.

[0023] In one of the embodiments, the adjustment unit includes a first resistor and a second resistor;

[0024] The first resistor and the second resistor are connected in series, and the first end of the series connection is connected to the power supply battery, the second end is grounded, and the middle port of the series connection is connected to the trigger end of the first switch device.

[0025] In one embodiment, the power supply module outputs a first level according to the first signal, or outputs a second level according to the second signal, including:

[0026] After receiving the first signal, the power supply module boosts the output level of the power supply battery to a first level for output;

[0027] After receiving the second signal, the power supply module uses the output level of the power supply battery as the second level for output.

[0028] In one of the embodiments, the power supply module includes a power supply unit and a switching unit;

[0029] The power supply unit is configured to start working upon receiving the first signal, boost the output level of the power supply battery to the first level, and output the voltage through the switching unit;

[0030] The power supply unit is further configured to stop working upon receiving the second signal, so that the switching unit outputs the output level of the power supply battery.

[0031] In one of the embodiments, the power supply unit includes a boost subunit; the switching unit includes a first diode and a second diode;

[0032] The enable terminal of the boost subunit is connected to the first signal, and the output terminal is connected to the anode of the first diode;

[0033] The cathode of the first diode is connected to the cathode of the second diode, and the anode of the second diode is connected to the power supply battery;

[0034] The enable end of the boost subunit starts working when receiving the first signal, boosting the output level of the power supply battery to the first level, so that the first diode is turned on and the second diode is turned off, and the first level is output through the first diode;

[0035] The enable end of the boost subunit stops working when receiving the second signal, so that the second diode is turned on and the first diode is turned off, and the output level of the power supply battery is output through the second diode.

[0036] In one of the embodiments, the power regulation circuit further includes: a setting module;

[0037] The input end of the setting module is connected to a control signal, and is used to maintain the input end of the power supply module at the first signal when the control signal is connected.

[0038] In a second aspect, the present application further provides a power supply circuit, comprising a power regulation circuit and a battery as described in any one of the first aspects above;

[0039] The power regulating circuit is used to detect the output voltage of the battery and operate in the first power mode or the second power mode according to the detection result.

[0040] In a third aspect, the present application further provides an earphone, comprising an earphone body and a power supply circuit as described in the second aspect located inside the earphone body.

[0041] The above-mentioned earphone power regulation circuit, power supply circuit and earphone have at least the following advantages:

[0042] The detection module of the present application is used to output a first signal or a second signal according to the power supply battery of the connected earphone; the power supply module outputs an electrical signal of a first level according to the first signal, or outputs an electrical signal of a second level according to the second signal; the power amplifier module operates in a first power mode according to the first level, so that the player operates in a first playback mode; or operates in a second power mode according to the second level, so that the player operates in a second playback mode. Among them, the power of the power supply battery is positively correlated with the output power of the power amplifier module. The present application can adjust the output level according to the power of the power supply battery, and then adjust the output power, so that the player works in the first playback mode when the power is large, and works in the second playback mode when the power is small, thereby achieving a balance between battery life and high performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] Figure 1 is a structural block diagram of a power regulation circuit in one embodiment;

[0045] Figure 2 is a structural block diagram of a detection module in an embodiment;

[0046] Figure 3 for Figure 2 The structural diagram of the detection module;

[0047] Figure 4 A structural block diagram of a power supply module according to an embodiment;

[0048] Figure 5 for Figure 4 The structural diagram of the power supply module;

[0049] Figure 6 is a schematic structural diagram of a power amplifier module in an embodiment;

[0050] Figure 7 is a structural block diagram of a power regulation circuit in another embodiment;

[0051] Figure 8 A schematic diagram of a structure of a module in an embodiment;

[0052] Fig. 9 is a structural block diagram of a power supply circuit in one embodiment;

[0053] Fig.10 FIG. 4 is a structural block diagram of a headset in one embodiment.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0055] Figure Number:

[0056] 1. Earphones; 2. Power circuit;

[0057] 10. Power regulation circuit; 20. Battery;

[0058] 100, detection module; 200, power supply module; 300, power amplifier module; 400, setting module;

[0059] 110, comparison unit; 120, signal generation unit; 130, adjustment unit;

[0060] 210. Power supply unit; 220. Switching unit. DETAILED DESCRIPTION

[0061] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0062] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0063] While some exemplary embodiments of the present invention have been described for the purpose of illustration, it should be understood that the present invention may be implemented in other ways not specifically shown in the drawings.

[0064] See also Figure 1 In one embodiment, the present application provides a power regulation circuit 10 for headphones, including: a detection module 100, a power supply module 200 and a power amplifier module 300.

[0065] The detection module 100 includes an input end and an output end. The input end of the detection module 100 is connected to a power supply battery, and the output end is connected to the input end of the power supply module 200, and is used to output a first signal or a second signal according to the connected power supply battery.

[0066] Specifically, the power supply battery is a device that provides electrical energy, and its output terminal can maintain a stable voltage value. The first signal and the second signal are level signals of different magnitudes, and the change in the voltage value of the power supply battery can be represented by the change in the level.

[0067] Optionally, the detection module 100 outputs a first signal or a second signal according to the connected power supply battery, including:

[0068] The detection module 100 compares the output level of the power supply battery with a preset threshold.

[0069] When the output level of the power supply battery is greater than or equal to a preset threshold, a first signal is output.

[0070] When the output level of the power supply battery is less than a preset threshold, a second signal is output.

[0071] The power supply module 200 includes an input terminal and an output terminal. The output terminal of the power supply module 200 is connected to the input terminal of the power amplifier module 300 and is used to output a first level according to a first signal or a second level according to a second signal.

[0072] Specifically, the first level or the second level output by the power supply module 200 is used to provide working power to the power amplifier module 300 so that the power amplifier module 300 outputs corresponding power.

[0073] Optionally, the power supply module 200 outputs a first level according to the first signal, or outputs a second level according to the second signal, including:

[0074] After receiving the first signal, the power supply module 200 boosts the output level of the power supply battery to a first level for output.

[0075] After receiving the second signal, the power supply module 200 uses the output level of the power supply battery as the second level for output.

[0076] The power amplifier module 300 includes an input end and an output end. The output end of the power amplifier module 300 is connected to the player of the earphone, and is used to work in a first power mode according to a first level so that the player works in a first play mode; or work in a second power mode according to a second level so that the player works in a second play mode. The power of the power supply battery is positively correlated with the output power of the power amplifier module 300, that is, the greater the power, the greater the output power, and vice versa.

[0077] Specifically, the power amplifier module 300 is usually used to amplify the amplitude and power of the input signal, and the amplified power is directly proportional to the input voltage. In this way, by adjusting the output level of the power supply module 200, the corresponding power value can be output to drive the player to work.

[0078] It should be noted that the above-mentioned first signal, second signal, first level, second level and the size of the preset threshold value are determined according to the actual working environment of the power regulating circuit 10 of the headset. For example, taking the case where the power regulating circuit 10 of the headset is set in a wireless headset, the power supply battery at this time is the output value of the built-in battery of the wireless headset, and its voltage range is between 3.2V and 4.2V. Based on this, the above-mentioned values ​​can be appropriately selected. In addition, the first power mode and the second power mode are used to characterize the power consumed when the headset player is working. The size of the power depends on the volume of the headset. The higher the volume, the more power is consumed. Generally speaking, when the user's volume remains unchanged, the power consumed in the first power mode is greater than that in the second power mode, and the sound quality of the first playback mode is better than that of the second playback mode.

[0079] The power regulating circuit 10 of the above-mentioned earphones, the detection module 100 can detect the voltage value of the connected power supply battery, and characterize the change of the power supply battery voltage value by outputting the first signal or the second signal; the power supply module 200 outputs the first level according to the first signal, or outputs the second level according to the second signal; the power amplifier module 300 works in the first power mode according to the first level, so that the player works in the first playback mode, or works in the second power mode according to the second level, so that the player works in the second playback mode. Using the above scheme, the present application can automatically adjust the output level according to the power of the power supply battery, and then automatically adjust the output power, so that the player works in the first playback mode when the power is large, and works in the second playback mode when the power is small, thereby achieving a balance between battery life and sound quality.

[0080] See also Figure 2 Optionally, the detection module 100 includes a comparison unit 110 and a signal generation unit 120 .

[0081] The comparison unit 110 includes an input terminal and an output terminal. The input terminal of the comparison unit 110 is connected to the power supply battery, and the output terminal of the comparison unit 110 is connected to the input terminal of the signal generating unit 120 for comparing the power supply battery with a preset threshold.

[0082] The signal generating unit 120 includes an input end and an output end. The output end of the signal generating unit 120 is connected to the input end of the power supply module 200, and is used to output a first signal when the output level of the power supply battery is greater than or equal to a preset threshold; and is used to output a second signal when the output level of the power supply battery is less than the preset threshold.

[0083] See also Figure 3 , illustratively, the comparing unit 110 includes a first switching device Q1, and the signal generating unit 120 includes a second power supply VBUCK and a second switching device Q2.

[0084] The trigger end of the first switch device Q1 is connected to the power supply battery VBAT as the input end of the comparison unit 110; the collector of the first switch device Q1 is connected to the trigger end of the second switch device Q2 as the output end of the comparison unit 110; the input end of the second switch device Q2 is connected to the second power supply VBUCK, and the output end is connected to the power supply module 200. In this embodiment, the first switch device Q1 is a triode, and the preset threshold is the conduction voltage between the base and the emitter.

[0085] The first switch device Q1 is turned on when the output level of the power supply battery VBAT is greater than or equal to a preset threshold, so that the second switch device Q2 is turned on to output the second power supply VBUCK to the power supply module 200. At this time, the voltage value of the second power supply VBUCK is the first signal.

[0086] The first switch device Q1 is turned off when the output level of the power supply battery VBAT is less than a preset threshold, so that the second switch device Q2 is turned off and outputs a low level to the power supply module 200. The low level is the second signal, which is usually a level signal lower than 0.2V.

[0087] See also Figure 2 Optionally, the detection module 100 also includes an adjustment unit 130 .

[0088] The adjustment unit 130 is connected in series between the power supply battery and the input end of the comparison unit 110, and is used to adjust the value of the preset threshold.

[0089] See also Figure 3 , illustratively, the adjustment unit 130 includes a first resistor R1 and a second resistor R2.

[0090] The first resistor R1 and the second resistor R2 are connected in series, and the first end of the series connection is connected to the power supply battery VBAT, the second end is grounded, and the middle port of the series connection is connected to the trigger end of the first switch device Q1. With this solution, the voltage value of the power supply battery VBAT is input to the trigger end of the first switch device Q1 after voltage division by the first resistor R1 and the second resistor R2. By adjusting the resistance values ​​of the first resistor R1 and the second resistor R2, the voltage of the trigger end of the first switch device Q1 can be adjusted. It should be understood that the third resistor R3 is a current limiting resistor, which is used to limit the current value flowing into the trigger end of the first switch device Q1.

[0091] Exemplarily, the working principle of the detection module 100 is described by taking the example that the power regulation circuit 10 of the headset is set in the wireless headset. The power supply battery VBAT is the output value of the built-in battery of the wireless headset. In this embodiment, the critical voltage value of the power supply battery VBAT is 3.8V, and the voltage value of the second power supply VBUCK is 1.7V. By reasonably setting the voltage values ​​of the first resistor R1 and the second resistor R2, when the power supply battery VBAT is greater than or equal to 3.8V, the first switch device Q1 is turned on, and the second switch device Q2 is turned on. At this time, the output terminal BOOST_Enable of the comparison unit 110 outputs the second power supply VBUCK, which is a high level of 1.7V. When the power supply battery VBAT is less than 3.8V, the first switch device Q1 is turned off, and the second switch device Q2 is turned off. At this time, the output terminal of the comparison unit 110 outputs a low level, which is close to 0V. In this way, the high power and low power of the battery can be automatically distinguished from the hardware.

[0092] The power regulating circuit 10 of the above-mentioned earphone sets a preset threshold by reasonably setting the resistance values ​​in the regulating unit 130. In this way, when the output level of the power supply battery is greater than or equal to the preset threshold, the signal generating unit 120 outputs a high-level second power supply; when the output level of the power supply battery is less than the preset threshold, the signal generating unit 120 outputs a low level. In this way, the high and low power levels of the power supply battery can be automatically distinguished from the hardware, so that the power supply module 200 outputs the corresponding level value.

[0093] See also Figure 4 Optionally, the power supply module 200 includes a power supply unit 210 and a switching unit 220 .

[0094] The power supply unit 210 includes a first input terminal, a second input terminal and an output terminal, wherein the first input terminal of the power supply unit 210 is connected to the power supply battery, the second input terminal of the power supply unit 210 is connected to the output terminal of the detection module 100, and the output terminal of the power supply unit 210 is connected to the input terminal of the switching unit 220. The power supply unit 210 is configured to start working upon receiving the first signal, boost the output level of the power supply battery to the first level, and output it through the switching unit 220.

[0095] The switching unit 220 includes a first input terminal, a second input terminal and an output terminal. The first input terminal of the switching unit 220 is connected to the output terminal of the power supply unit 210, the second input terminal of the switching unit 220 is connected to the power supply battery, and the output terminal of the switching unit 220 is connected to the input terminal of the power amplifier module 300.

[0096] The power supply unit 210 is further configured to stop working upon receiving the second signal, so that the switching unit 220 outputs the output level of the power supply battery.

[0097] See also Figure 5 , illustratively, the power supply unit 210 includes a boost subunit U1; the switching unit 220 includes a first diode D1 and a second diode D2. The following takes the example of the power regulation circuit 10 of the headset being arranged in the wireless headset to illustrate the working principle of the power supply module 200. In this embodiment, the boost subunit U1 adopts a power chip SSD101R2, the third pin of which serves as the first input terminal of the power supply unit 210, the fourth pin as the second input terminal of the power supply unit 210, and the first pin as the output terminal of the power supply unit 210. Among them, the third pin is the enable terminal. When the level is high, the power chip works and boosts the power supply battery VBAT to the first level; when the enable terminal is at a low level, the power chip stops working.

[0098] Specifically, the enable terminal of the boost subunit U1 is connected to the first signal, the output terminal is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the cathode of the second diode D2, and the anode of the second diode D2 is connected to the power supply battery VBAT.

[0099] When the enable terminal of the boost subunit U1 receives a high-level first signal, it starts to work and boosts the power supply battery VBAT to a first level. In this embodiment, the first level is 4.5 V. Since the voltage value of the first level is greater than the voltage value of the power supply battery VBAT, the first diode D1 is turned on and the second diode D2 is turned off, and the first level is output through the first diode D1.

[0100] When the enable terminal of the boost subunit U1 receives the second signal of low level, it stops working. Then, at this time, the first diode D1 is turned off, the second diode D2 is turned on, and the power supply battery VBAT is output through the second diode D2.

[0101] In the power regulating circuit 10 of the earphone, the power supply unit 210 starts working when receiving a high-level first signal, boosts the power supply battery to a first level, and outputs it through the switching unit 220; the power supply unit 210 stops working when receiving a low-level second signal, and the power supply battery is output through the switching unit 220. With this solution, the power supply module 200 automatically adjusts the output voltage value according to the high and low power levels of the power supply battery, thereby causing the power amplifier module 300 to output a corresponding power value.

[0102] See also Figure 6 , the power amplifier module 300 includes a power amplifier chip U2. In this embodiment, the model of the power amplifier chip U2 is TMS8003. The following takes the power adjustment circuit 10 of the earphone set in the wireless earphone as an example to illustrate the working principle of the power amplifier module 300. The output level VDD_AP of the power supply module 200 is connected to the power supply end of the power amplifier chip U2 after being stabilized by capacitors C9 and C10. The audio signal is connected to the input end of the power amplifier chip U2 through resistors R5-R8 and capacitors C4-C7, wherein the resistors R5-R8 and capacitors C4-C7 constitute a filter. The power amplifier chip U2 outputs the amplified audio signal and drives the speaker to vibrate through two TVS tubes to realize the conversion from electrical signal to acoustic signal. When the output level VDD_AP of the power supply module 200 is a higher first level, the power output of the power amplifier module 300 is large and works in the first power mode. At this time, the earphone player works in the first playback mode with better sound quality. When the output level VDD_AP of the power supply module 200 is a lower second level, the power output of the power amplifier module 300 is reduced and operates in the second power mode. At this time, the headphone player operates in the second playback mode with average sound quality to extend the battery life.

[0103] In the power regulating circuit 10 of the above-mentioned earphone, when the input level of the power amplifier module 300 is a higher first level, the power output of the power amplifier module 300 is large and the sound quality is better; when the output level is a lower second level, the power output of the power amplifier module 300 is reduced to extend the battery life, thereby achieving a balance between battery life and sound quality.

[0104] See also Figure 7 Optionally, the earphone power regulating circuit 10 further includes: a setting module 400 .

[0105] The setting module 400 includes an input terminal and an output terminal. The input terminal of the setting module 400 is connected to a control signal, and the output terminal of the setting module 400 is connected to the second input terminal of the power supply module 200, so as to maintain the input terminal of the power supply module 200 at the first signal when the control signal is connected.

[0106] Specifically, the control signal is a high level signal, which can be generated by a signal generator or a control chip.

[0107] See also Figure 8 , exemplarily, the setting module 400 includes a third switch device Q3. When the control signal is generated by the control chip, if the control chip receives an operation instruction from the user, it enters the priority mode. At this time, the control chip pulls up the pin GPIO to turn on the third switch device Q3, and the input terminal BOOST_Enable of the power supply module 200 is forced to be set to the second power supply VBUCK, and the power supply module 200 will always output a higher first level, so that the power amplifier module 300 always works in a high power state. When the power regulation circuit 10 of the earphone is set in the wireless earphone, this can ensure that the output sound quality of the earphone is maintained at a high level.

[0108] When the user selects the priority mode, the power regulation circuit 10 of the above-mentioned earphones forces the input end of the power supply module 200 to be set to the second power supply through the setting module 400, so that the power supply module 200 always outputs a higher first level, thereby maintaining the power amplifier module 300 in a high-power state, thereby meeting the user's high-quality sound requirements for the earphones.

[0109] See also Fig. 9 In one embodiment, the present application further provides a power supply circuit 2, comprising: the power regulation circuit 10 and the battery 20 of the earphone involved in the above embodiment.

[0110] The input end of the power regulating circuit 10 of the earphone is connected to the output end of the battery 20 for detecting the output voltage of the battery 20 and operating in the first power mode or the second power mode according to the detection result.

[0111] Optionally, the power regulating circuit 10 of the headset detects the output voltage of the battery 20 and operates in the first power mode or the second power mode according to the detection result, including:

[0112] The detection module 100 of the power regulation circuit 10 of the headset compares the output voltage of the battery 20 with a preset threshold, and outputs a first signal when the output level of the power supply battery is greater than or equal to the preset threshold; and outputs a second signal when the output level of the power supply battery is less than the preset threshold.

[0113] Furthermore, after receiving the first signal, the power supply module 200 of the power regulation circuit 10 of the headset boosts the output level of the power supply battery to the first level for output; after receiving the second signal, the output level of the power supply battery is used as the second level for output.

[0114] Furthermore, after receiving the first level, the power amplifier module 300 of the power regulation circuit 10 of the headset operates in a first power mode with higher power; after receiving the second level, the output power is reduced and operates in the second power mode to extend the battery life of the battery 20.

[0115] Furthermore, when the user selects the priority mode, the setting module 400 of the power regulation circuit 10 of the headset forcibly sets the input end of the power supply module 200 to the second power supply so that the power supply module 200 always outputs a higher first level, thereby maintaining the power amplifier module 300 in a high power state.

[0116] The power supply circuit 2 and the power regulating circuit 10 of the earphone can detect the power level of the battery 20 and automatically adjust the output power according to the power level. When the power level is high, a higher power is output to ensure the high-performance working state of the earphone player; when the power level is low, a lower power is output to extend the battery life of the battery 20 and achieve a balance between high performance and battery life. At the same time, when the user selects the priority mode, the power regulating circuit 10 of the earphone maintains a high-performance working state to meet the user's high-quality needs.

[0117] See also Fig.10 In one embodiment, the present application further provides an earphone 1, comprising an earphone body and a power supply circuit 2 as involved in the above embodiments located inside the earphone body.

[0118] It should be understood that the earphone 1 in this embodiment also includes a player, and the power circuit 2 is connected to the player to amplify the input audio signal to drive the player to produce sound. In the process of driving the player to produce sound, the power circuit 2 automatically adjusts the output power according to the battery level to achieve a balance between battery life and sound quality.

[0119] See also Figure 3 , Figure 5 , Figure 6 and Figure 8 The following is a detailed description of the process of the power supply circuit 2 driving the player to produce sound in conjunction with the diagram.

[0120] See also Figure 3 , the first switch device Q1 detects the power of the battery voltage VBAT. The first switch device Q1 compares the divided power supply battery VBAT with the preset threshold. The first switch device Q1 is turned on when the power supply battery VBAT is greater than or equal to the preset threshold, so that the second switch device Q2 is turned on and outputs the second power supply VBUCK 1.7V; the first switch device Q1 is turned off when the power supply battery VBAT is less than the preset threshold, so that the second switch device Q2 is turned off and outputs a low level.

[0121] See also Figure 5, the enable terminal of the boost subunit U1 is connected to the output signal BOOST_Enable of the second switch device Q2. When the output signal BOOST_Enable is the second power supply VBUCK, the boost subunit U1 starts to work and boosts the power supply battery VBAT to the first level 4.5V. At this time, the first diode D1 is turned on and the second diode D2 is turned off. The first level is output through the first diode D1. When the output signal BOOST_Enable is a low level, the boost subunit U1 stops working. At this time, the first diode D1 is turned off, the second diode D2 is turned on, and the power supply battery VBAT is output through the second diode D2. Exemplarily, at this time, the power supply battery VBAT is 3.8V.

[0122] See also Figure 6 The power supply end of the power amplifier chip U2 is connected to the output signal VDD_AP of the switching unit 220. When the output signal VDD_AP is at a higher first level, the output power of the power amplifier chip U2 is larger, and the sound quality output by the player is better at this time; when the output signal VDD_AP is at a lower second level, the output power of the power amplifier chip U2 is reduced to extend the battery life, thereby achieving a balance between the battery life and sound quality of the headset 1.

[0123] See also Figure 8 When the user selects the priority mode, the control chip forces the input end of the third switch device Q3 to be pulled high, so that the third switch device Q3 is turned on. At this time, the output signal BOOST_Enable maintains the high level of the second power supply VBUCK, so that the boost subunit U1 works, and the power supply battery VBAT is boosted to the first level 4.5V and output to the power amplifier chip U2. At this time, the power amplifier chip U2 maintains a high power state, and the player always outputs high-quality audio signals to meet the user's high-quality sound requirements for headphones.

[0124] In the above-mentioned earphone 1, the power circuit 2 detects the power level of the earphone battery and automatically adjusts the output power according to the power level. When the power level is high, a higher power is output to ensure that the earphone 1 outputs high-quality audio; when the power level is low, a lower power is output to extend the battery life and achieve a balance between battery life and sound quality. At the same time, when the user selects the priority mode, the power circuit 2 always outputs a higher power to meet the user's demand for high-quality audio of the earphone 1.

[0125] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0126] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0127] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A power regulation circuit for headphones, characterized in that: Including: detection module, power supply module and power amplifier module; The input end of the detection module is connected to the power supply battery of the headset, and is used to output the first signal or the second signal according to the connected power supply battery; The power supply module is connected to the detection module and is used to output an electrical signal of a first level according to the first signal, or to output an electrical signal of a second level according to the second signal; The power amplifier module is connected to the player of the headset and is used to operate in a first power mode according to the first level so that the player operates in a first play mode; or operating in a second power mode according to the second level, so that the player operates in a second play mode; The power level of the power supply battery is positively correlated with the output power of the power amplifier module.

2. The power regulation circuit according to claim 1, characterized in that: The detection module outputs a first signal or a second signal according to the connected power supply battery, including: The detection module compares the output level of the power supply battery with a preset threshold; When the output level of the power supply battery is greater than or equal to the preset threshold, outputting a first signal; When the output level of the power supply battery is less than the preset threshold, a second signal is output.

3. The power regulation circuit according to claim 2, characterized in that: The detection module includes a comparison unit and a signal generation unit; The comparison unit is used to compare the output level of the power supply battery with the preset threshold; The signal generating unit is configured to output a first signal when the output level of the power supply battery is greater than or equal to the preset threshold; And used for outputting a second signal when the output level of the power supply battery is less than the preset threshold.

4. The power regulation circuit according to claim 3, characterized in that: The comparison unit includes a first switch device, and the signal generation unit includes a second power supply and a second switch device; The trigger end of the first switch device is connected to the power supply battery, and the output end is connected to the trigger end of the second switch device; the input end of the second switch device is connected to the second power supply, and the output end is connected to the power supply module; The first switch device is turned on when the output level of the power supply battery is greater than or equal to the preset threshold value, so that the second switch device outputs the second power supply to the power supply module after being turned on; The first switch device is turned off when the output level of the power supply battery is less than the preset threshold value, so that the second switch device outputs a low level to the power supply module after being turned off.

5. The power regulation circuit according to claim 3, characterized in that: The detection module also includes an adjustment unit; The regulating unit is connected in series between the power supply battery and the input end of the comparing unit, and is used to regulate the value of the preset threshold.

6. The power regulation circuit according to claim 5, characterized in that: The adjustment unit includes a first resistor and a second resistor; The first resistor and the second resistor are connected in series, and the first end of the series connection is connected to the power supply battery, the second end is grounded, and the middle port of the series connection is connected to the trigger end of the first switch device.

7. The power regulation circuit according to claim 1, characterized in that: The power supply module outputs a first level according to the first signal, or outputs a second level according to the second signal, including: After receiving the first signal, the power supply module boosts the output level of the power supply battery to a first level for output; After receiving the second signal, the power supply module uses the output level of the power supply battery as the second level for output.

8. The power regulating circuit according to claim 7, characterized in that: The power supply module includes a power supply unit and a switching unit; The power supply unit is configured to start working upon receiving the first signal, boost the output level of the power supply battery to the first level, and output the voltage through the switching unit; The power supply unit is further configured to stop working upon receiving the second signal, so that the switching unit outputs the output level of the power supply battery.

9. The power regulating circuit according to claim 8, characterized in that: The power supply unit includes a boost subunit; the switching unit includes a first diode and a second diode; The enable terminal of the boost subunit is connected to the first signal, and the output terminal is connected to the anode of the first diode; The cathode of the first diode is connected to the cathode of the second diode, and the anode of the second diode is connected to the power supply battery; The enable end of the boost subunit starts working when receiving the first signal, boosting the output level of the power supply battery to the first level, so that the first diode is turned on and the second diode is turned off, and the first level is output through the first diode; The enable end of the boost subunit stops working when receiving the second signal, so that the second diode is turned on and the first diode is turned off, and the output level of the power supply battery is output through the second diode.

10. The power regulating circuit according to any one of claims 1 to 9, characterized in that: Also includes: Set up the module; The input end of the setting module is connected to a control signal, and is used to maintain the input end of the power supply module at the first signal when the control signal is connected.

11. A power supply circuit, characterized in that: comprising a power regulating circuit and a battery as claimed in any one of claims 1 to 10; The power regulating circuit is used to detect the output voltage of the battery and operate in the first power mode or the second power mode according to the detection result.

12. A headset, characterized in that: The invention comprises an earphone body and a power supply circuit as claimed in claim 11 located in the earphone body.

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