CN221043180U - TWS Bluetooth headset display circuit and TWS Bluetooth headset device - Google Patents

TWS Bluetooth headset display circuit and TWS Bluetooth headset device Download PDF

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Publication number
CN221043180U
CN221043180U CN202322618325.3U CN202322618325U CN221043180U CN 221043180 U CN221043180 U CN 221043180U CN 202322618325 U CN202322618325 U CN 202322618325U CN 221043180 U CN221043180 U CN 221043180U
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China
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led lamp
bluetooth headset
switch circuit
tws bluetooth
resistor
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CN202322618325.3U
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Chinese (zh)
Inventor
郭世文
吴海全
岳祥
杨卉
谢光河
吴勇
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Shenzhen Grandsun Electronics Co Ltd
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Shenzhen Grandsun Electronics Co Ltd
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Abstract

The application discloses a TWS Bluetooth headset display circuit and TWS Bluetooth headset device, comprising: the display circuit comprises a first LED lamp and a second LED lamp, wherein a first output end of the power module is connected with the positive electrode of the first LED lamp, a negative electrode of the first LED lamp is connected with the positive electrode of the second LED lamp, the negative electrode of the second LED lamp is grounded, the output voltage of the first output end of the power module is smaller than the sum of forward on voltages of the first LED lamp and the second LED lamp, the first output end of the power module is connected with the negative electrode of the first LED lamp through the first switch circuit, the GPIO port is connected with the control end of the first switch circuit, the negative electrode of the first LED is grounded through the second switch circuit, and the working states of the first LED lamp and the second LED lamp can be controlled by only one GPIO port.

Description

TWS Bluetooth headset display circuit and TWS Bluetooth headset device
Technical Field
The application relates to the technical field of Bluetooth headset display, in particular to a TWS Bluetooth headset display circuit and a TWS Bluetooth headset device.
Background
In TWS bluetooth headset application, usually, different states of the headset are displayed through two different color LED lamps, for example, the sufficient power of the headset and the insufficient power of the headset are respectively represented through a green LED lamp and a red LED lamp. As shown in fig. 1 and 2, the main control chip needs to control the display states of the red LED lamp and the green LED lamp by using two GPIO ports, however, in the case of shortage of GPIO port resources, it is difficult to allocate two GPIO ports to control the display states of the two LED lamps.
Disclosure of utility model
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a TWS Bluetooth headset display circuit and a TWS Bluetooth headset device, which can solve the problem that the existing Bluetooth headset display technology has insufficient GPIO port resources.
According to an embodiment of the first aspect of the present application, a TWS bluetooth headset display circuit includes:
a power module;
The display circuit comprises a first LED lamp and a second LED lamp, a first output end of the power supply module is connected with an anode of the first LED lamp, a cathode of the first LED lamp is connected with an anode of the second LED lamp, a cathode of the second LED lamp is grounded, and an output voltage of the first output end of the power supply module is smaller than the sum of forward conduction voltages of the first LED lamp and the second LED lamp;
The GPIO port is connected with the control end of the first switch circuit and is used for controlling the first switch circuit to be conducted when the GPIO port outputs a high level;
And the cathode of the first LED is grounded through the second switch circuit, and the GPIO port is connected with the control end of the second switch circuit so as to be used for controlling the second switch circuit to be conducted when the GPIO port outputs a low level.
The TWS Bluetooth headset display circuit according to the embodiment of the first aspect of the application has at least the following beneficial effects:
When the GPIO port outputs a high level, the first switch circuit is turned on, the second switch circuit is turned off, the power supply module outputs voltage to the positive electrode and the negative electrode of the first LED lamp to be equal, the first LED lamp is not lightened, meanwhile, the power supply module outputs voltage to the positive electrode of the second LED lamp, the negative electrode of the second LED lamp is grounded, and the second LED lamp is lightened due to the pressure difference between the positive electrode and the negative electrode; when the GPIO port outputs a low level, the first switch circuit is disconnected, the second switch circuit is conducted, the power module outputs voltage to the positive electrode of the first LED lamp, the negative electrode of the first LED lamp is grounded, the first LED lamp is lightened due to the pressure difference between the positive electrode and the negative electrode, the positive electrode and the negative electrode of the second LED lamp are grounded, and the second LED lamp is not lightened; when the GPIO port is in a high-resistance state, the power supply module outputs voltage to the first LED lamp and the second LED lamp, and the first LED lamp and the second LED lamp are not lightened because the output voltage of the power supply module is far smaller than the sum of forward conducting voltages of the first LED lamp and the second LED lamp. Compared with the traditional Bluetooth headset display technology, the TWS Bluetooth headset display circuit provided by the embodiment of the application has the advantages that the working states of the first LED lamp and the second LED lamp can be controlled respectively by only one GPIO port under the condition that the GPIO port resources are tense.
According to some embodiments of the application, the first switch circuit includes a first NMOS tube and a first PMOS tube, the GPIO port is connected to a gate of the first NMOS tube, a source of the first NMOS tube is grounded, a drain of the first NMOS tube is connected to a gate of the first PMOS tube, a source of the first PMOS tube is connected to a first output end of the power module, and a drain of the first PMOS tube is connected to a negative electrode of the first LED lamp.
According to some embodiments of the application, the power supply further comprises a first resistor, wherein a first output end of the power supply module is connected with one end of the first resistor, and the other end of the first resistor is connected with the drain electrode of the first NMOS tube.
According to some embodiments of the application, the second switch circuit includes a second PMOS transistor and a second NMOS transistor, the GPIO port is connected to a gate of the second PMOS transistor, a source of the second PMOS transistor is connected to a second output end of the power module, a drain of the second PMOS transistor is connected to the gate of the second NMOS transistor, a source of the second NMOS transistor is grounded, and a drain of the second NMOS transistor is connected to a negative electrode of the first LED lamp.
According to some embodiments of the application, the second resistor is further included, a drain electrode of the second PMOS tube is connected to one end of the second resistor, and the other end of the second resistor is grounded.
According to some embodiments of the application, the LED lamp further comprises a third resistor, wherein the negative electrode of the first LED lamp is connected with one end of the third resistor, and the other end of the third resistor is connected with the positive electrode of the second LED lamp.
The TWS bluetooth headset device according to the embodiment of the second aspect of the application includes the TWS bluetooth headset display circuit described above.
The TWS Bluetooth headset device according to the embodiment of the second aspect of the present application has at least the following advantageous effects:
When the GPIO port outputs a high level, the first switch circuit is turned on, the second switch circuit is turned off, the power supply module outputs voltage to the positive electrode and the negative electrode of the first LED lamp to be equal, the first LED lamp is not lightened, meanwhile, the power supply module outputs voltage to the positive electrode of the second LED lamp, the negative electrode of the second LED lamp is grounded, and the second LED lamp is lightened due to the pressure difference between the positive electrode and the negative electrode; when the GPIO port outputs a low level, the first switch circuit is disconnected, the second switch circuit is conducted, the power module outputs voltage to the positive electrode of the first LED lamp, the negative electrode of the first LED lamp is grounded, the first LED lamp is lightened due to the pressure difference between the positive electrode and the negative electrode, the positive electrode and the negative electrode of the second LED lamp are grounded, and the second LED lamp is not lightened; when the GPIO port is in a high-resistance state, the power supply module outputs voltage to the first LED lamp and the second LED lamp, and the first LED lamp and the second LED lamp are not lightened because the output voltage of the power supply module is far smaller than the sum of forward conducting voltages of the first LED lamp and the second LED lamp. Compared with the traditional Bluetooth headset display technology, the TWS Bluetooth headset display circuit provided by the embodiment of the application has the advantages that the working states of the first LED lamp and the second LED lamp can be controlled respectively by only one GPIO port under the condition that the GPIO port resources are tense.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The application is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a control circuit diagram of a red LED lamp in the prior art;
FIG. 2 is a control circuit diagram of a green LED lamp in the prior art;
fig. 3 is a circuit diagram of a TWS bluetooth headset according to an embodiment of the application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, electrical connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
A TWS bluetooth headset display circuit and a TWS bluetooth headset device according to an embodiment of the application are described below with reference to fig. 3.
According to an embodiment of the present application, a TWS bluetooth headset display circuit, as shown in fig. 3, includes: the display circuit comprises a first LED lamp D1 and a second LED lamp D3, a first output end VDD33 of the power module is connected with the positive electrode of the first LED lamp D1, a negative electrode of the first LED lamp D1 is connected with the positive electrode of the second LED lamp D3, the negative electrode of the second LED lamp D3 is grounded, the output voltage of the first output end VDD33 of the power module is smaller than the sum of the forward conduction voltages of the first LED lamp D1 and the second LED lamp D3, the first output end VDD33 of the power module is connected with the negative electrode of the first LED lamp D1 through the first switch circuit, the GPIO port is connected with the control end of the first switch circuit to be used for controlling the first switch circuit to be conducted when the GPIO port outputs a high level, the negative electrode of the first LED is grounded through the second switch circuit, and the GPIO port is connected with the control end of the second switch circuit to be used for controlling the second switch circuit to be conducted when the GPIO port outputs a low level.
In this embodiment, when the GPIO port outputs a high level, the first switch circuit is turned on, the second switch circuit is turned off, the voltage output by the power module is equal to the voltage of the positive electrode and the negative electrode of the first LED lamp D1, the first LED lamp D1 is not turned on, meanwhile, the voltage output by the power module is equal to the positive electrode of the second LED lamp D3, the negative electrode of the second LED lamp D3 is grounded, and the second LED lamp D3 is turned on due to the pressure difference between the positive electrode and the negative electrode; when the GPIO port outputs a low level, the first switch circuit is disconnected, the second switch circuit is conducted, the power supply module outputs voltage to the positive electrode of the first LED lamp D1, the negative electrode of the first LED lamp D1 is grounded, the first LED lamp D1 is lightened due to the pressure difference between the positive electrode and the negative electrode, the positive electrode and the negative electrode of the second LED lamp D3 are grounded, and the second LED lamp D3 is not lightened; when the GPIO port is in a high-resistance state, the power supply module outputs voltage to the first LED lamp D1 and the second LED lamp D3, and the first LED lamp D1 and the second LED lamp D3 are not lightened because the output voltage of the power supply module is far smaller than the sum of forward conducting voltages of the first LED lamp D1 and the second LED lamp D3. Compared with the traditional Bluetooth headset display technology, the TWS Bluetooth headset display circuit provided by the embodiment of the application has the advantages that the working states of the first LED lamp D1 and the second LED lamp D3 can be respectively controlled by only one GPIO port under the condition that the GPIO port resources are tense.
Note that, the high level of GIPO is 1.8V, the low level is 0V, and the output voltage of the first output terminal VDD33 of the power module is 3.3V. The forward turn-on voltage of the first LED lamp D1 is 2.8V, and the first LED lamp D1 is displayed green. The forward turn-on voltage of the second LED lamp D3 is 1.8V, and the second LED lamp D3 is displayed in red.
In an embodiment of the present application, as shown in fig. 3, the first switch circuit includes a first NMOS transistor Q1, a first PMOS transistor Q2, and a first resistor R6, where the GPIO port is connected to the gate of the first NMOS transistor Q1, the source of the first NMOS transistor Q1 is grounded, the drain of the first NMOS transistor Q1 is connected to the gate of the first PMOS transistor Q2, the source of the first PMOS transistor Q2 is connected to a first output terminal VDD33 of the power module, the drain of the first PMOS transistor Q2 is connected to the negative electrode of the first LED lamp D1, the first output terminal VDD33 of the power module is connected to one end of the first resistor R6, and the other end of the first resistor R6 is connected to the drain of the first NMOS transistor Q1.
In this embodiment, when the GPIO port outputs a high level, the second switch circuit is turned off, the first NMOS transistor Q1 is turned on, the gate of the first PMOS transistor Q2 is grounded, since the source of the first PMOS transistor Q2 is connected to the first output terminal VDD33 of the power module, the source voltage of the first PMOS transistor Q2 is greater than the gate voltage, the first PMOS transistor Q2 is turned on, and since the first switch circuit is turned on, the power module outputs a voltage to the positive electrode and the negative electrode of the first LED lamp D1, the voltages of the positive electrode and the negative electrode of the first LED lamp D1 are equal, and the first LED lamp D1 is not turned on; meanwhile, the power module outputs voltage to the positive electrode of the second LED lamp D3, the negative electrode of the second LED lamp D3 is grounded, and the second LED lamp D3 is lightened due to the pressure difference between the positive electrode and the negative electrode. When the GPIO port outputs a low level, the first NMOS tube Q1 and the first PMOS tube Q2 are cut off, the first switch circuit is disconnected, the second switch circuit is conducted, the power module outputs voltage to the positive electrode of the first LED lamp D1, the negative electrode of the first LED lamp D1 is grounded, the first LED lamp D1 is lightened due to the pressure difference between the positive electrode and the negative electrode, the positive electrode and the negative electrode of the second LED lamp D3 are grounded, and the second LED lamp D3 is not lightened.
In an embodiment of the present application, as shown in fig. 3, the second switch circuit includes a second PMOS transistor Q3, a second NMOS transistor Q4, and a second resistor R1, where the GPIO port is connected to the gate of the second PMOS transistor Q3, the source of the second PMOS transistor Q3 is connected to the second output terminal VDD18 of the power module, the drain of the second PMOS transistor Q3 is connected to the gate of the second NMOS transistor Q4, the source of the second NMOS transistor Q4 is grounded, the drain of the second NMOS transistor Q4 is connected to the cathode of the first LED lamp D1, the drain of the second PMOS transistor Q3 is connected to one end of the second resistor R1, and the other end of the second resistor R1 is grounded.
In this embodiment, when the GPIO port outputs a low level, the first PMOS transistor Q2 and the first NMOS transistor Q1 are turned off, the first switch circuit is turned off, the second PMOS transistor Q3 and the second NMOS transistor Q4 are turned on, the power module outputs a voltage to the positive electrode of the first LED lamp D1, the negative electrode of the first LED lamp D1 is grounded, the first LED lamp D1 is turned on due to a voltage difference between the positive electrode and the negative electrode, both the positive electrode and the negative electrode of the second LED lamp D3 are grounded, and the second LED lamp D3 is not turned on; when the GPIO port outputs a high level, the second PMOS tube Q3 and the second NMOS tube Q4 are cut off, the first NMOS tube Q1 is conducted, the grid electrode of the first PMOS tube Q2 is grounded, the source electrode of the first PMOS tube Q2 is connected with the first output end VDD33 of the power module, the source electrode voltage of the first PMOS tube Q2 is larger than the grid electrode voltage, the first PMOS tube Q2 is conducted, the first switch circuit is conducted, the power module outputs voltage to the positive electrode and the negative electrode of the first LED lamp D1, the voltage of the positive electrode and the negative electrode of the first LED lamp D1 is equal, and the first LED lamp D1 is not lightened. When the GPIO port is in a high-resistance state, the first output end VDD33 of the power supply module outputs voltage to the first LED lamp D1 and the second LED lamp D3, and the first LED lamp D1 and the second LED lamp D3 are not lightened because the output voltage of the power supply module is far smaller than the sum of forward conducting voltages of the first LED lamp D1 and the second LED lamp D3.
It should be noted that, the output voltage of the second output terminal VDD18 of the power module is 1.8V.
In an embodiment of the present application, as shown in fig. 3, the LED lamp further includes a third resistor R2, wherein a negative electrode of the first LED lamp D1 is connected to one end of the third resistor R2, and the other end of the third resistor R2 is connected to an anode of the second LED lamp D3.
In this embodiment, the third resistor R2 plays a role of voltage division, so as to avoid burning out the first LED lamp D1 or the second LED lamp D3.
In addition, the application also discloses a TWS Bluetooth headset device which comprises the TWS Bluetooth headset display circuit.
In this embodiment, when the GPIO port outputs a high level, the first switch circuit is turned on, the second switch circuit is turned off, the voltage output by the power module is equal to the voltage of the positive electrode and the negative electrode of the first LED lamp D1, the first LED lamp D1 is not turned on, meanwhile, the voltage output by the power module is equal to the positive electrode of the second LED lamp D3, the negative electrode of the second LED lamp D3 is grounded, and the second LED lamp D3 is turned on due to the pressure difference between the positive electrode and the negative electrode; when the GPIO port outputs a low level, the first switch circuit is disconnected, the second switch circuit is conducted, the power supply module outputs voltage to the positive electrode of the first LED lamp D1, the negative electrode of the first LED lamp D1 is grounded, the first LED lamp D1 is lightened due to the pressure difference between the positive electrode and the negative electrode, the positive electrode and the negative electrode of the second LED lamp D3 are grounded, and the second LED lamp D3 is not lightened; when the GPIO port is in a high-resistance state, the power supply module outputs voltage to the first LED lamp D1 and the second LED lamp D3, and the first LED lamp D1 and the second LED lamp D3 are not lightened because the output voltage of the power supply module is far smaller than the sum of forward conducting voltages of the first LED lamp D1 and the second LED lamp D3. Compared with the traditional Bluetooth headset display technology, the TWS Bluetooth headset display circuit of the embodiment of the application can respectively control the working states of the first LED lamp D1 and the second LED lamp D3 by only one GPIO port under the condition that the GPIO port resources are tense.
The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.

Claims (7)

  1. TWS bluetooth headset display circuit, characterized in that it comprises:
    a power module;
    The display circuit comprises a first LED lamp and a second LED lamp, a first output end of the power supply module is connected with an anode of the first LED lamp, a cathode of the first LED lamp is connected with an anode of the second LED lamp, a cathode of the second LED lamp is grounded, and an output voltage of the first output end of the power supply module is smaller than the sum of forward conduction voltages of the first LED lamp and the second LED lamp;
    The GPIO port is connected with the control end of the first switch circuit and is used for controlling the first switch circuit to be conducted when the GPIO port outputs a high level;
    The cathode of the first LED lamp is grounded through the second switch circuit, and the GPIO port is connected with the control end of the second switch circuit and used for controlling the second switch circuit to be conducted when the GPIO port outputs a low level.
  2. 2. The TWS bluetooth headset display circuit of claim 1, wherein:
    The first switch circuit comprises a first NMOS tube and a first PMOS tube, the GPIO port is connected with the grid electrode of the first NMOS tube, the source electrode of the first NMOS tube is grounded, the drain electrode of the first NMOS tube is connected with the grid electrode of the first PMOS tube, the source electrode of the first PMOS tube is connected with the first output end of the power module, and the drain electrode of the first PMOS tube is connected with the negative electrode of the first LED lamp.
  3. 3. The TWS bluetooth headset display circuit of claim 2, wherein: the power supply module further comprises a first resistor, wherein a first output end of the power supply module is connected with one end of the first resistor, and the other end of the first resistor is connected with the drain electrode of the first NMOS tube.
  4. 4. The TWS bluetooth headset display circuit of claim 1, wherein:
    The second switch circuit comprises a second PMOS tube and a second NMOS tube, the GPIO port is connected with the grid electrode of the second PMOS tube, the source electrode of the second PMOS tube is connected with the second output end of the power module, the drain electrode of the second PMOS tube is connected with the grid electrode of the second NMOS tube, the source electrode of the second NMOS tube is grounded, and the drain electrode of the second NMOS tube is connected with the cathode of the first LED lamp.
  5. 5. The TWS bluetooth headset display circuit of claim 4, wherein:
    The second PMOS transistor is characterized by further comprising a second resistor, wherein the drain electrode of the second PMOS transistor is connected with one end of the second resistor, and the other end of the second resistor is grounded.
  6. 6. The TWS bluetooth headset display circuit of claim 1, wherein:
    The LED lamp further comprises a third resistor, the negative electrode of the first LED lamp is connected with one end of the third resistor, and the other end of the third resistor is connected with the positive electrode of the second LED lamp.
  7. TWS bluetooth headset device, characterized in that it comprises a TWS bluetooth headset display circuit according to any of claims 1 to 6.
CN202322618325.3U 2023-09-26 2023-09-26 TWS Bluetooth headset display circuit and TWS Bluetooth headset device Active CN221043180U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322618325.3U CN221043180U (en) 2023-09-26 2023-09-26 TWS Bluetooth headset display circuit and TWS Bluetooth headset device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322618325.3U CN221043180U (en) 2023-09-26 2023-09-26 TWS Bluetooth headset display circuit and TWS Bluetooth headset device

Publications (1)

Publication Number Publication Date
CN221043180U true CN221043180U (en) 2024-05-28

Family

ID=91184589

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322618325.3U Active CN221043180U (en) 2023-09-26 2023-09-26 TWS Bluetooth headset display circuit and TWS Bluetooth headset device

Country Status (1)

Country Link
CN (1) CN221043180U (en)

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