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A mobile phone waterproof circuit

A waterproof, mobile phone technology, applied in electrical components, telephone communication, telephone structure and other directions, can solve the problems of mobile phone circuit short circuit, inability to do it, poor drop resistance, and poor water resistance, and achieve the effect of protection.

Active Publication Date: 2020-08-21
曹颖鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the communication field, the application and development of smart phones are becoming more and more extensive. However, the drop resistance and waterproof performance of existing mobile phones are poor, especially for mobile phones after water, because the battery and internal circuits are still in the circuit conduction. However, the conductivity of water will cause the internal circuit of the mobile phone to be short-circuited or scrapped. At present, consumers generally can only replace the motherboard or a new mobile phone at a high price. In response to this problem, major mobile phone manufacturers in the world are exploring mobile phone waterproof strategies. , and the current waterproof of mobile phones, most of them are sealed with mechanical structures or coated with waterproof materials for improvement. However, the exposed USB ports, headphone jacks, SPK audio holes, SIM card holders, etc. of mobile phones cannot be completely sealed and waterproof.

Method used

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  • A mobile phone waterproof circuit
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  • A mobile phone waterproof circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a mobile phone waterproof circuit is provided, the left side is the battery protection board side circuit, the right side is the main board side circuit, a connector J1 is provided between the battery protection board side circuit and the main board side circuit, and the main board side circuit is set Waterproof detection circuit, the waterproof detection circuit includes three pairs of waterproof detection test points: the first waterproof detection test point (TP1A, TP1B), the second waterproof detection test point (TP2A, TP2B), the third waterproof detection test point (TP3A, TP3B ), these three pairs of waterproof detection test points have been treated with copper leakage, and are set at the interface that is easy to enter the water on the main board side of the mobile phone, such as: USB port, SPK audio port, earphone jack, SIM card holder; the main board load circuit Rload , and the current limiting protection resistor Rh;

[0035] The...

Embodiment 2

[0045] Such as Figure 4 As shown, an optimized mobile phone waterproof circuit is provided. The main difference between it and Embodiment 1 is the circuit on the right side of the main board. Two sets of circuits connected in parallel between the conversion chip LDO and the voltage comparator, the first set of circuits include the first resistor R1 and the second resistor R2 connected in series, the second set of circuits include the current limiting protection resistor Rh, the current limiting protection resistor Rh and the The waterproof detection test points (TPnA, TPnB) are connected in series; the voltage comparator is used to compare the voltage value measured between the first resistor R1 and the second resistor R2 of the first group of circuits with the second group of circuit waterproof detection test points (TPnA, TPnB) and Compare the measured voltage values ​​between the current-limiting protection resistors Rh; assume: the voltage at TP between the waterproof det...

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Abstract

The invention discloses a mobile phone waterproof circuit. The mobile phone waterproof circuit comprises a battery protection board side circuit, a mainboard side circuit, and a connector (J1), wherein the mainboard side circuit comprises a waterproof detection circuit, the circuit comprises waterproof detection testing points (TPnA, and TPnB), a mainboard load circuit (Rload), and a current-limiting protection resistor (Rh); the battery protection board side circuit comprises a control unit, a control unit comprises a (CTL) pin, a (DO) pin, a (CO) pin, and a discharge switch (S1) connected with the (DO) pin; the positive electrode (G+) of the power is connected to the mainboard side circuit through the signal so as to supply power for the mainboard side circuit; the power negative electrode (G-) is connected to the mainboard side circuit through a signal line so as to provide public backflow place for the mainboard side circuit. When the mobile phone mainboard side encounters the water, the mainboard side circuit is in short-circuit, the battery protection board side circuit automatically turn off the power supply to realize the protection on the mobile phone main board; and the power supply to the main board side circuit can be recovered when the mobile phone is dried, and the mobile phone returns to work.

Description

technical field [0001] The invention relates to the field of mobile phone circuits, in particular to a waterproof circuit for mobile phones. Background technique [0002] With the rapid development of the communication field, the application and development of smart phones are becoming more and more extensive. However, the existing mobile phones have poor drop resistance and waterproof performance, especially for mobile phones after being flooded, because the battery and internal circuits are still in the circuit conduction. The conductivity of water will cause the internal circuit of the mobile phone to be short-circuited or scrapped. At present, consumers generally can only replace the motherboard or a new mobile phone at a high price. In response to this problem, major mobile phone manufacturers in the world are exploring mobile phone waterproof strategies. , and the current waterproof of mobile phones, most of them are sealed with mechanical structures or coated with wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/02H04M1/24
CPCH04M1/026H04M1/0274H04M1/0277H04M1/24
Inventor 曹颖鹏
Owner 曹颖鹏