Earphone power supply control method, earphone power supply control system, and mobile terminal
A technology of power supply and control method, which is applied in the direction of handset/headphone accessories, rechargeable batteries/devices, electrical components, etc., which can solve problems such as abnormal shutdown of the terminal and increase in the load impedance of the headset, and achieve the effect of avoiding abnormal shutdown of the terminal
Active Publication Date: 2016-05-18
湖南泽安科技有限责任公司
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Problems solved by technology
[0005] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide users with a control method, system and mobile terminal for the power supply of earphones, so as to overcome the problems in the prior art when the earphones are hot plugged or used. The defect that the load impedance increases or decreases, resulting in abnormal shutdown of the terminal
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[0048] In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0049] The invention provides a method for controlling the power supply of earphones, such as figure 2 As shown, the method includes the following steps:
[0050] S1. When the earphone is in the hot-plug state or in use, obtain the impedance value generated by the earphone load, and judge whether the impedance value exceeds or is lower than the preset impedance value. If it exceeds, perform step S2. If it is low If so, step S3 is executed.
[0051]Since the impedance value generated by the load of the earphone may change when it is hot plugged or in use, the impedance value of ...
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The invention provides an earphone power supply control method, an earphone power supply control system, and a mobile terminal. When the earphone is in the hot-plug state or in the use, the impedance value generated by the earphone load can be acquired, and then whether the impedance value is greater than or lower than the preset impedance value can be determined. When the impedance value is greater than the preset impedance value, the signal of the impedance value of the load greater than the preset impedance value can be input in a booster module, and under the control of the booster module, the voltage input in the earphone can be used for the power supply of the earphone after being boosted. When the impedance value is lower than the preset impedance value, the signal of the impedance value of the load lower than the preset impedance value can be input in a step-down module, and under the control of the step-down module, the voltage input in the earphone can be used for the power supply of the earphone after being stepped down. The stable power supply voltage can be provided for the earphone, and the abnormal shutdown of the terminal caused by the change of the voltage of two ends can be prevented, and great convenience can be provided for the user using the audio frequency of the terminal.
Description
technical field [0001] The present invention relates to the field of terminal control, in particular to a method and system for controlling an earphone power supply and a mobile terminal. Background technique [0002] After the headset is connected to the terminal, the voltage signal output by the power supply for the headset may increase or decrease the load impedance due to the insertion of the headset, thus causing the power supply voltage input to the headset to be unstable, which will cause the mobile terminal to automatically shut down . [0003] like figure 1 As shown, when the impedance detection module detects that the load △R of the left channel increases when the earphone is working, then △R is increased and divided to the left to obtain a larger voltage signal, and the voltage provided by the power supply of the earphone to the earphone unit Under the same condition, the actual working voltage of the earphone unit decreases. If the power supply of the earphone ...
Claims
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IPC IPC(8): H04R1/10
CPCH04R1/1025H04R2201/10
Inventor 章金玉黄树伟
Owner 湖南泽安科技有限责任公司