Bluetooth earphone and power on/off control method thereof

A technology of bluetooth headset and main control circuit, which is applied in the direction of headset mechanical/electronic switch, earpiece/headphone accessories, transducer circuit, etc., which can solve the need for real-time monitoring of voltage on the chip, limited placement of Hall elements, and increased computing load on the chip and other issues, to achieve the effect of low production cost, high signal transmission efficiency, and small chip calculation

Pending Publication Date: 2019-04-05
伍军华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: high standby power consumption; when the battery of the charging box is exhausted, the headset will automatically turn on when it is put into the box; the chip needs to monitor the voltage in real time, which increases the computing load of the chip
The disadvantages of this method are: high cost; the placement of the Hall element is limited, which is not suitable for the use of small earphone structures; the high external magnetic field will cause the earphone to be turned off by mistake; will automatically boot
The disadvantage of this method is that it takes up a lot of space and is not suitable for small earphones; while increasing the number of contact pins, it also increases the risk of poor contact of the contact pins

Method used

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  • Bluetooth earphone and power on/off control method thereof
  • Bluetooth earphone and power on/off control method thereof
  • Bluetooth earphone and power on/off control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment one, including the attached figure 2 The high-level input terminal Vin1, low-level input terminal Vin2, NMOS field effect transistor Q1, first resistor R1, second resistor R2, Bluetooth headset battery BAT and main control circuit shown in the figure. The main control circuit includes a main control chip, and in this embodiment, the model of the main control chip is AB1524_5X5_64L. The first pin of the main control chip is a REGEN / POWER pin, and the second pin is a VCHG pin.

[0040] The high-level input terminal Vin1 is directly connected to the VCHG pin of the main control chip, and the low-level input terminal Vin2 is electrically connected to one end of the first resistor R1. The gate G of the NMOS field effect transistor Q1 is electrically connected to the other end of the first resistor R1 and one end of the second resistor R2 at the same time, and the drain D of the NMOS field effect transistor Q1 is electrically connected to the other end of the sec...

Embodiment 2

[0042] Embodiment two, as attached figure 2 As shown, on the basis of the first embodiment, a diode Q2 is added. The cathode of the diode Q2 is electrically connected to the low-level input terminal Vin2 and one end of the first resistor R1 at the same time, and the anode of the diode Q2 is grounded to the AGND pin of the main control chip.

[0043] Embodiment 2 In addition to achieving the technical effect of Embodiment 1, the added diode Q2 can form a charging circuit for the battery of the Bluetooth headset on the one hand, and on the other hand, the diode Q2 connects the first resistor R1, the second resistor R2 and the NMOS The field effect transistor Q1 is isolated from the AGND pin of the main control chip, so that the switch control circuit mainly composed of NMOS field effect transistor Q1, first resistor R1 and second resistor R2 can independently control the Bluetooth headset switch, and at the same time Does not affect the normal operation of the charging circuit...

Embodiment 3

[0044] Embodiment three, as attached figure 2 As shown, on the basis of the second embodiment, the third resistor R3 is added. The high-level input terminal Vin1 is connected to the VCHG pin of the main control chip through the third resistor R3.

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Abstract

The invention discloses a Bluetooth earphone which is powered on / off according to a connection state with a charging device and a power on / off control method of the earphone. The Bluetooth earphone comprises a master control circuit, a charging port, and a crystal triode detecting the connection state between the charging port and the charging device. The crystal triode is switched on / off according to the connection state, and makes level change in the output end; and the master control circuit controls power on / off of the Bluetooth earphone according to the high or low level in the output endof the crystal triode. When the Bluetooth earphone is connected with the charging device, the earphone is powered off and then enters a charging state. When the Bluetooth earphone is disconnected from the charging device, the earphone is powered on automatically only if the earphone has power. The Bluetooth earphone and power on / off control method thereof have the advantages including extremely low power consumption, high reliability, simple circuit and low production cost.

Description

technical field [0001] The invention relates to the field of bluetooth earphones and their on / off control, in particular to a bluetooth earphone which is automatically turned on and off according to the connection state with a charging device and its on / off control method. Background technique [0002] Unlike traditional earphones, Bluetooth earphones can free users from the shackles of earphone wires. Bluetooth headsets are usually charged by connecting to a charger. When the user is out and there is no power plug around them, they cannot be charged. Therefore, a Bluetooth headset charging box has appeared. When the Bluetooth headset is put into the charging box, the Bluetooth headset will automatically shut down, and the charging box will start to charge it. When the Bluetooth headset is taken out of the charging box, the charging will end, and the Bluetooth headset will automatically turn on. [0003] There are currently three technologies used to identify the status of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10H04R3/00
CPCH04R1/1041H04R3/00H04R2201/10H04R2430/00
Inventor 伍军华
Owner 伍军华
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