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Method for detecting earphone insertion, device for detecting earphone insertion and interface circuit

A technology for earphone plugs and earphones, which is applied in the field of interface circuits and can solve problems such as misidentification of multi-functional plugs

Active Publication Date: 2017-11-17
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for detecting earphone insertion, a device for detecting earphone insertion and an interface circuit, which are used to solve the problem of misidentification of existing multifunctional plugs

Method used

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  • Method for detecting earphone insertion, device for detecting earphone insertion and interface circuit
  • Method for detecting earphone insertion, device for detecting earphone insertion and interface circuit
  • Method for detecting earphone insertion, device for detecting earphone insertion and interface circuit

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Embodiment Construction

[0064] figure 1 It is a flowchart of a method for detecting earphone insertion provided by an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0065] Step 11, detecting the resistance value between the contact sheets of the left and right sound channels of the electronic device jack.

[0066] Wherein, the jack can be a single-function earphone jack, and the jack can also be a multi-function jack, for example figure 2 As shown, the jack can be used as an earphone jack of an electronic device for inserting an earphone plug, and at the same time, the earphone jack can also be used as an optical fiber jack of an electronic device for inserting an optical fiber plug, and so on.

[0067] Step 12. When the detected resistance value is greater than or equal to 32 ohms and less than or equal to 64 ohms, it is determined that an earphone plug is inserted into the jack.

[0068] Such as image 3 As shown, for the earphone 31, the resistance ran...

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Abstract

The invention provides a method for detecting earphone insertion, a device for detecting earphone insertion, and an interface circuit. The method includes: detecting the resistance value between the contact sheets of the left and right sound channels of the jack of an electronic device; when the detected resistance value is greater than or equal to 32 ohms and less than or equal to 64 ohms, it is determined that an earphone plug is inserted into the jack. By detecting the resistance value between the left and right channels of the jack, it solves the problem that the headphone-like object is misidentified as a headphone after it is inserted into the jack or a two-in-one socket, especially for the two-in-one socket of headphones and optical fiber. It can effectively distinguish whether the earphone plug is inserted or the optical fiber plug is inserted into the jack.

Description

technical field [0001] The invention relates to interface circuit technology, in particular to a method for detecting earphone insertion, a device for detecting earphone insertion and an interface circuit. Background technique [0002] At present, with the miniaturization of various handheld electronic devices or household electronic devices, there are fewer and fewer exposed interfaces on the electronic devices, so that the exposed interfaces have more functions. For example, the number of interfaces is reduced by using two interfaces in one, but the functions of the interfaces are not reduced. [0003] At present, the jack of the earphone has more functions, such as the jack of the earphone can not only be inserted into the earphone to realize the function of the earphone, but also can be used to insert an optical fiber for communication, and so on. For ease of description, this earphone jack is called a multi-function earphone jack. [0004] However, this type of multif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
Inventor 李进良李念曹静
Owner HUAWEI DEVICE CO LTD