CN112968988A

CN112968988A - Electronic device with waterproof function and waterproof method

Info

Publication number: CN112968988A
Application number: CN201911283514.1A
Authority: CN
Inventors: 吴国伟
Original assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chiun Mai Communication Systems Inc
Current assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chiun Mai Communication Systems Inc
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-06-15
Anticipated expiration: 2039-12-13
Also published as: CN112968988B

Abstract

An electronic device having a waterproof function, comprising: a power source; a graphene oxide film layer having a resistance value that increases when the graphene oxide film layer absorbs a liquid; the fixed resistor and the graphene oxide film layer are connected to the power supply, and the power supply is used for supplying voltage to the graphene oxide film layer and the fixed resistor; the voltage detector is used for detecting the voltage value of the connection part of the graphene oxide film layer and the fixed resistor; the processor is used for generating a shutdown signal when the voltage detector detects that the voltage value changes; and the power management chip is used for responding to the shutdown signal and closing the power supply. The embodiment of the invention also provides a waterproof method.

Description

Electronic device with waterproof function and waterproof method

Technical Field

The present disclosure relates to electronic devices, and particularly to an electronic device with waterproof function and a waterproof method.

Background

Currently, most smart phones are provided with a waterproof structure, for example, a waterproof mesh is fixed in various gaps (such as an earphone interface, a microphone interface, and a receiver seal) of the phone by using an adhesive. However, even with such a waterproof structure, if the mobile phone is soaked in water for a long time, the mobile phone may still be turned on, and thus, the internal circuit may be shorted and burned.

Disclosure of Invention

In view of the above, it is desirable to provide an electronic device with waterproof function and a waterproof method, so as to solve the above problems.

The invention provides an electronic device with waterproof function, comprising:

a power source;

a graphene oxide film layer having a resistance value that increases when the graphene oxide film layer absorbs a liquid;

the fixed resistor and the graphene oxide film layer are connected to the power supply, and the power supply is used for supplying voltage to the graphene oxide film layer and the fixed resistor;

the voltage detector is used for detecting the voltage value of the connection part of the graphene oxide film layer and the fixed resistor;

the processor is used for generating a shutdown signal when the voltage detector detects that the voltage value changes; and

and the power management chip is used for responding to the shutdown signal and closing the power supply.

The invention also provides a waterproof method applied to an electronic device, wherein the electronic device comprises a power supply, a graphene oxide film layer and a fixed resistor, and the waterproof method comprises the following steps:

detecting a voltage value at a connection position of the graphene oxide film layer and the fixed resistor, wherein the graphene oxide film layer has a resistance value, the resistance value is increased when the graphene oxide film layer absorbs liquid, the fixed resistor and the graphene oxide film layer are connected to the power supply, and the power supply is used for supplying voltage to the graphene oxide film layer and the fixed resistor;

and when the voltage value changes, the power supply is turned off.

Compared with the prior art, the method can measure the partial pressure change when the graphene oxide film layer meets water, and then timely control the electronic device to be shut down, so that the electronic device is prevented from being short-circuited and burnt due to the fact that the electronic device meets the water.

Drawings

Fig. 1 is a block diagram of an electronic device according to a preferred embodiment of the invention.

Fig. 2 is a schematic diagram of voltage division detection in the electronic device shown in fig. 1.

Fig. 3 is a schematic diagram illustrating an appearance result of the electronic device shown in fig. 1.

Fig. 4 is a schematic cross-sectional view of the electronic device shown in fig. 3 along line IV-IV.

FIG. 5 is a flow chart of a waterproof method according to a preferred embodiment of the present invention.

Description of the main elements

Power supply 10

Graphene oxide film layer 20

Fixed resistor 30

Voltage detector 40

Processor 50

Power management chip 60

Housing 70

Opening 71

Waterproof net 72

Acceleration detector 80

Resistance value R₁、R₂

Electronic device 100

Steps S51-S55

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Fig. 1 illustrates an electronic device 100 according to a preferred embodiment of the invention, which includes a power source 10, a graphene oxide film 20, a fixed resistor 30, a voltage detector 40, a processor 50, and a power management chip 60.

The graphene oxide film layer 20 has a resistance value that increases when the graphene oxide film layer 20 absorbs a liquid (e.g., when the electronic device 100 is dropped in water).

Referring to fig. 2, the fixed resistor 30 and the graphene oxide film layer 20 are connected in series to the power supply, and the power supply is used for supplying a voltage to the graphene oxide film layer 20 and the fixed resistor 30.

The voltage detector 40 is used for detecting a voltage value at a connection point of the graphene oxide film layer 20 and the fixed resistor 30. As shown in fig. 2, the resistance values of the fixed resistor 30 and the graphene oxide film layer 20 are defined as R₁And R₂Thus, the voltage value at the connection can be determined by the function U (R)₁,R₂) Represents, and U (R)₁,R₂) Can be calculated by the following formula:

U(R₁,R₂)＝U₀R₂/(R₁+R₂)

wherein, U₀Representing the value of the output voltage of the power supply 10. According to the partial pressure law, when the graphene oxide film layer 20 absorbs the liquid, the resistance value R is obtained₂At increasing voltage value U (R) at the junction₁,R₂) And increases accordingly. The processor 50 is configured to generate a shutdown signal when the voltage detector 40 detects the voltage value change.

The power management chip 60 is configured to respond to the shutdown signal and turn off the power supply 10. Therefore, even if the electronic device 100 is soaked in water for a long time, the internal circuit of the electronic device 100 is not in danger of short circuit or damage due to the timely turn-off of the power supply 10.

The fixed resistor 30 may be a resistor with a fixed resistance value in the electronic device 100, and more specifically, the fixed resistor 30 may be a resistor provided inside the processor 50, or may be a resistor provided inside the power supply 10.

Referring to fig. 3 and 4, in the present embodiment, the electronic device 100 further includes a housing 70 and an opening 71 formed in the housing 70, and the graphene oxide film layer 20 is mounted in the opening 71. The opening 71 is a place where the electronic device 100 is easy to enter water, for example, an earphone hole, a plug hole formed on the housing 70 through a USB interface, a speaker hole corresponding to a speaker, a jack formed on the housing 70 through a SIM card, a camera hole for installing a camera, or a sound transmission hole corresponding to a microphone. The graphene oxide film layer 20 has a small thickness, and even if the graphene oxide film layer is mounted in the opening 71, the normal use of the opening 71 is not affected.

Further, a waterproof net 72 is arranged in the opening 71, the waterproof net 72 is fixed on the inner wall of the opening 71 through an adhesive, and the graphene oxide film layer 20 is located outside the waterproof net. The adhesive is waterproof adhesive. The waterproof mesh 72 can prevent the open pores 71 from being filled with water in a time interval between the increase of the resistance value of the graphene oxide film layer 20 and the turn-off of the power supply, thereby further improving the waterproof performance of the electronic device 100.

As shown in fig. 1, in the present embodiment, the electronic device 100 further includes an acceleration detector 80, and the acceleration detector 80 is configured to detect an acceleration of the electronic device 100 and compare the acceleration with an acceleration threshold when the electronic device 100 is in a power-on state. When the acceleration is greater than the acceleration threshold, indicating that the electronic device 100 is moving instantaneously (i.e., there may be a risk of falling into water), the voltage detector 40 detects the voltage value of the connection.

In another embodiment, the electronic device 100 further includes a humidity detector (not shown) for detecting a humidity value of an environment where the electronic device is located and comparing the humidity value with a humidity threshold, and when the voltage value changes and the humidity value is smaller than the humidity threshold, the processor 50 turns off the power supply, so as to prevent the electronic device 100 from misjudging due to an excessively high ambient humidity, and thus, the power supply 10 is erroneously turned off.

Referring to fig. 5, a preferred embodiment of the invention provides a waterproof method, which is applied to the electronic device 100. The sequence of the steps of the waterproof method can be changed according to different requirements, and certain steps can be omitted or combined. The waterproof method comprises the following steps:

in step S51, the acceleration detector 80 detects the acceleration of the electronic device 100 when the electronic device 100 is in the power-on state.

In step S52, the acceleration detector 80 compares the acceleration with an acceleration threshold to determine whether the acceleration is greater than the acceleration threshold, if so, go to step S53, otherwise, go back to step S51.

In step S53, the voltage detector 40 detects a voltage value at a connection point between the graphene oxide film layer 20 and the fixed resistor 30.

In step S54, the processor 50 determines whether the voltage value changes, if so, proceeds to step S55, otherwise, returns to step S51.

In step S55, the power management chip 60 turns off the power supply 10.

Compared with the prior art, the embodiment of the invention can measure the partial pressure change when the graphene oxide film layer is in water, and then timely control the electronic device to be shut down, thereby avoiding the internal circuit of the electronic device from being short-circuited and burnt down due to the water.

It will be appreciated by those skilled in the art that the above embodiments are illustrative only and not intended to be limiting, and that suitable modifications and variations may be made to the above embodiments without departing from the true spirit and scope of the invention.

Claims

1. An electronic device having a waterproof function, comprising:

a power source;

2. The electronic device of claim 1, further comprising an acceleration detector for detecting an acceleration of the electronic device when the electronic device is in the power-on state and comparing the acceleration with an acceleration threshold, wherein the voltage detector detects the voltage value at the connection when the acceleration is greater than the acceleration threshold.

3. The electronic device of claim 1, further comprising a humidity detector for detecting a humidity level of an environment in which the electronic device is located and comparing the humidity level with a humidity threshold, wherein the processor turns off the power supply when the voltage value changes and the humidity level is less than the humidity threshold.

4. The electronic device of claim 1, further comprising a housing and an opening in the housing, wherein the graphene oxide film layer is mounted in the opening.

5. The electronic device of claim 4, wherein a waterproof net is arranged in the opening, the waterproof net is fixed on the inner wall of the opening through an adhesive, and the graphene oxide film layer is positioned outside the waterproof net.

6. A waterproof method applied to an electronic device, wherein the electronic device comprises a power supply, a graphene oxide film layer and a fixed resistor, and the waterproof method comprises the following steps:

and when the voltage value changes, the power supply is turned off.

7. The method of claim 6, wherein prior to detecting the voltage value at the junction of the graphene oxide film layer and the fixed resistor, the method further comprises:

detecting the acceleration of the electronic device when the electronic device is in a starting state; and

comparing the acceleration with an acceleration threshold;

and when the acceleration is larger than the acceleration threshold value, detecting the voltage value of the connection part.

8. The waterproofing method according to claim 6 wherein, when the voltage value changes, the waterproofing method further comprises:

detecting the humidity value of the environment where the electronic device is located; and

comparing the humidity value to a humidity threshold;

wherein the power supply is turned off again when the humidity value is less than the humidity threshold value.