CN106412245A - Waterproof method for USB interface and mobile terminal - Google Patents
Waterproof method for USB interface and mobile terminal Download PDFInfo
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- CN106412245A CN106412245A CN201610805927.1A CN201610805927A CN106412245A CN 106412245 A CN106412245 A CN 106412245A CN 201610805927 A CN201610805927 A CN 201610805927A CN 106412245 A CN106412245 A CN 106412245A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3888—Arrangements for carrying or protecting transceivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B2001/3894—Waterproofing of transmission device
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Telephone Function (AREA)
Abstract
The invention discloses a waterproof method for a USB interface. A control circuit is arranged between the USB interface and a mainboard chip of a mobile terminal, and the control circuit is used for controlling a connected state of a channel between a working interface of the USB interface and a working interface of the mainboard chip. When an equipment connection event is judged to occur, the control circuit makes the channel between the working interface of the USB interface and the working interface of the mainboard chip conductive; when an equipment pull-out event is judged to occur, the control circuit cuts off the channel between the working interface of the USB interface and the working interface of the mainboard chip. When no equipment is connected, the channel between the working interface of the USB interface and the working interface of the mainboard chip is cut off, so that even if conducting liquid enters, the working interface of the USB has short circuit, and the conduction of the whole power circuit of the mobile terminal cannot occur to cause short circuit of the power circuit.
Description
Technical field
The present invention relates to communication technical field, particularly to a kind of USB interface waterproof method.The present invention also relates to one
Plant mobile terminal.
Background technology
With scientific and technical development, the function of mobile terminal is more and more various and powerful at present, disappears for common
For the person of expense user, performance is no longer to limit the bottleneck that mobile phone uses, on the contrary, the use environment of mobile phone increasingly becomes restriction
The factor that mobile phone uses.
For mobile terminal manufacturer, the liquid-proof function of mobile terminal always be its wish the technical goal realized it
One, because user's one side wants to, to rain successfully using mobile phone for example in bathing under more applied environments
Under the special environment such as it；On the other hand, user also be intended to mobile phone will not be because of the neglectful feelings of other during routine use
Waterlogged damage easily under condition.Therefore release possess the mobile terminal of water-proof function for occupy user market have very big excellent
Gesture.
Because liquid is typically all conductive materials, the therefore liquid conductor such as water is larger to the destructiveness of mobile phone, gently then damages
USB (Universal Serial Bus, USB (universal serial bus)) module, heavy then cell phone mainboard is scrapped, and the waterproof for user needs
Ask, also have some manufacturers to be researched and developed for waterproof mobile phone at present, the waterproof method of employing is mainly following several ways：
1st, mobile phone integral sealing waterproof, the method is a kind of mobile phone waterproof method the most frequently used at present, is carried out using fuselage
Seal, and the equipment such as earpiece holes, USB hole, button speaker, receiver is sealed using sealing gasket, in use also
Cock cap to be used the part having exposed circuit contact such as enters and seals to earphone jack, USB receptacle, but using process plug
Cap brings inconvenience to using, and easily leads to mobile phone waterproof effect to lose efficacy because cock cap does not put in place.
2nd, all devices of mobile phone adopt waterproof device, the method to each functional module mainboard of mobile phone, speaker, press
Key, receiver, USB module, the circuit board of handset module spray nano level waterproof membrane, to reach the effect of waterproof, but this side
Method is protected to mobile phone internal circuit, for the hard contact inside exposed earphone jack and USB data line jack still
Need special protection it is impossible to completely accomplish not needing accessory to carry out waterproof.
Inventor finds during realizing the present invention, and the waterproof currently for the USB interface of mobile terminal is mainly
Form the annular seal space of USB socket by accessories such as cock caps, thus preventing the open circuit of the hard contact of USB.The program pair
Circuit part in mobile terminal does not make any improvement, and therefore actually existing water-repellent type is substantially all belonging to
Passive water-repellent type.If but or after the aging loss of cock cap, mobile terminal just loses water-proof function.In this situation
Under, if in circuit immersion conducting liquid (such as water) of mobile terminal it is more likely that can cause in USB interface each working interface it
Between short circuit, and now the power supply of the pin of the interface of USB and PMU (power management chip is a part for mainboard chip) is
It is joined directly together, therefore easily make the PMU on mainboard chip be mistaken for equipment and connect, lead to internal circuit power supply short circuit to burn out
Power supply chip.
As can be seen here, on the premise of being independent of external component (such as cock cap), how to make the USB interface of mobile terminal
Using the impact of not liquid body, become those skilled in the art's technical problem urgently to be resolved hurrily.
Content of the invention
The invention provides a kind of USB interface waterproof method, mobile terminal have in its USB interface power supply unit or
During the insertion of OTG equipment, by the channel conductive between the working interface in USB interface and the working interface of mainboard chip, in its USB
When in interface, no equipment inserts, the passage between the working interface in USB interface and the working interface of mainboard chip is cut off, from
And make the USB interface of mobile terminal can not prevent the inside electricity to mobile terminal for the liquid by other external auxiliary parts
Road produces impact, improves the convenience of equipment use and the experience of user.Bag in the mobile terminal that the method is related to
Containing USB interface, control circuit and mainboard chip, described control circuit is used for controlling working interface and the institute of described USB interface
State the connected state of the passage between the working interface of mainboard chip, the method includes：
When judging generation equipment connection event, described control circuit is by the working interface of described USB interface and described master
Channel conductive between the working interface of board chip；
When judging that generation equipment extracts event, described control circuit is by the working interface of described USB interface and described master
Passage cut-out between the working interface of board chip.
Accordingly, a kind of mobile terminal of disclosure, including USB interface, control circuit and mainboard chip, described control
Circuit processed is used for controlling the connected state of the passage between the working interface of described USB interface and the working interface of described mainboard chip
State, wherein, described control circuit includes：
Conduction module, when judging generation equipment connection event, by the working interface of described USB interface and described mainboard core
Channel conductive between the working interface of piece；
Cut-out module, when judging that generation equipment extracts event, by the working interface of described USB interface and described mainboard core
Passage between the working interface of piece disconnects.
As can be seen here, by applying the technical scheme of the application, set between the USB interface of mobile terminal and mainboard chip
Put control circuit, this control circuit is used for controlling the passage between the working interface of USB interface and the working interface of mainboard chip
Connected state.When judging generation equipment connection event, control circuit is by the work of the working interface of USB interface and mainboard chip
Make the channel conductive between interface；When judging that generation equipment extracts event, control circuit is by the working interface of USB interface and master
Passage cut-out between the working interface of board chip.Due to when not having equipment to access, the working interface of USB interface and mainboard core
Passage between the working interface of piece is cut-off, therefore, even if now there being conducting liquid to enter so that the work of USB connects
Mouth short circuit, is also not result in that the conducting of mobile terminal whole power circuit causes the short circuit of power circuit.Thus can make mobile whole
The USB interface at end can not prevent liquid from producing shadow to the internal circuit of mobile terminal by other external auxiliary parts
Ring.
Brief description
A kind of schematic flow sheet of USB interface waterproof method that Fig. 1 proposes for the application；
A kind of logic control circuit schematic diagram of mobile terminal that Fig. 2 is proposed by the application specific embodiment；
Fig. 3 A is when mobile terminal accesses the handling process schematic diagram of USB externally fed in the application specific embodiment；
Fig. 3 B is when mobile terminal accesses the handling process schematic diagram of OTG equipment in the application specific embodiment；
A kind of structural representation of mobile terminal that Fig. 4 proposes for the application.
Specific embodiment
As stated in the Background Art, the current mobile terminal with USB function mainly passes through for the waterproof of USB interface
The accessories such as cock cap forming the annular seal space of USB interface, thus preventing the short circuit of each working interface in USB interface.But such as
Fruit cock cap is aging or loses, and the USB interface of mobile terminal will lose the performance of waterproof, that is, cannot be by mobile terminal
Internal circuit realize the waterproof of exposed USB interface.
In view of above technical problem, the present invention proposes a kind of USB interface waterproof method, and the method is applied to including USB
In the mobile terminal of interface, control circuit and mainboard chip.For ease of illustrating the flow process of the present invention, below first to this movement
The different parts of terminal are described below：
(1) USB interface
For mobile terminal, the effect one side of USB interface is that power supply unit is accessed mobile terminal, and then realizes
Charging process to mobile terminal, is on the other hand that the storage device supporting OTG is accessed mobile terminal, enables mobile terminal
Carry out data transmission and this storage device between.
(2) control circuit
For regular handset, its USB interface is typically all direct and the mainboard chip of interior of mobile phone connects.Outside confession
After electric equipment or OTG storage device access USB interface, by this USB interface to mainboard chip provide power supply or
It is data-transformation facility.Because the situation that the application is intended to according to External Access Equipment controls USB interface and interior of mobile phone master
Conducting between board chip, is provided with a control circuit therefore between USB interface and mainboard chip, described for controlling
The connected state of the passage between the working interface of the working interface of USB interface and described mainboard chip.Have in this control circuit
Two control units, comprise multiple paster relays in each control unit, these paster relays are used for according to mainboard chip
Signal or the electric power thus supplied of USB interface is controlling between the working interface of USB interface and the working interface of mainboard chip
Passage connected state.
(3) mainboard chip
For common mobile terminal, the circuit on its mainboard can be divided into four plates：Radio frequency part logical gate
Power pack interface portion.Wherein radio frequency be just responsible for receiving and transmitting signal with extraneous contact, including antenna and controller frequency
Synthesis and power amplifier, for being modulated demodulating.Logical gate is made up of CPU and software memory etc., for processing
The operation of some routines, works including controlling whole machine various pieces.And power pack forms by power supply IC with for fulgurite, for inciting somebody to action
In the electric power distribution in battery to each element it is ensured that the normal work of this mobile terminal.Interface portion is then for coordinating
The module being operated between mobile terminal and user and being linked up, such as display screen, SIM, vibrator, ring, keyboard, instruction
Lamp etc..In the technical scheme of the application, the mainboard of mobile terminal is integrally considered a mainboard chip, by control circuit
It is connected with USB interface, thus realizing function of supplying power and data transfer communications function.
Schematic flow sheet based on a kind of USB interface waterproof method described above, proposed by the invention as shown in figure 1,
Comprise the following steps：
S101, when there is equipment connection event, control circuit is by the work of the working interface of USB interface and mainboard chip
Channel conductive between interface.
In the preferred embodiment of the application, control circuit includes the first control unit and the second control unit, and often
Individual control unit is all made up of multiple paster relays.
Relay is a kind of electric control device, is when the change of input quantity (energizing quantity) reaches regulation requirement, electric
Make controlled volume that a kind of electrical equipment of predetermined Spline smoothing occurs in output circuit.It has control system (also known as input circuit) and
By the interactive relationship between control system (also known as output loop).It is commonly used in the control circuit of automatization, it is actually
It is to go to control one kind " automatic switch " of high current running with small current.Therefore play in circuit automatically adjust, safeguard protection, turn
Change the effect such as circuit.
The relay adopting in preferred embodiment in this application is specially paster relay, and its interface includes public termination
Mouth, normally opened pin interface, the first control interface and the second control interface.Wherein, the first control interface and second controls and connects
Mouth is its control interface, when the voltage being applied to the first control interface and the second control interface exceedes default threshold value, will
The switch conduction between public end interface and normally opened pin interface can be made, thus by adjusting the first control interface and the second control
Voltage between interface processed can be realized to circuit turn-on and the control disconnecting.
In the preferred embodiment of the application, in each control unit, the mode of paster relay Access Control circuit is different
, specific as follows：
In the first control unit, the first control interface of paster relay is connected with the power supply interface of USB interface, and second
Control interface is connected with the ground interface of USB interface, and public end interface is connected with the working interface of USB interface, and normally opened pin connects
Mouth is connected with the working interface of mainboard chip；
In the second control unit, the first control interface of paster relay is connected with the power supply interface of mainboard chip, the
Two control interfaces are connected with the ground interface of mainboard chip, and public end interface is connected with the working interface of mainboard chip, normally opened pipe
Foot interface is connected with the working interface of USB interface.
It can be seen that, in the access way of above-mentioned paster relay, two controls of the paster relay in the first control unit
Interface processed is connected with ground interface with the power supply interface of USB interface respectively, therefore when power supply interface and the ground interface of USB interface
Paster relay in first control unit will be turned on more than during default threshold value；Paster relay in second control unit
Two control interfaces of device are connected with ground interface with the power supply interface of mainboard chip respectively, therefore when the power supply of mainboard chip connects
Paster relay in second control unit will be turned on by mouth and ground interface more than during default threshold value.
For the USB interface of mobile terminal, its major function be just used to mobile terminal is charged and with
Mobile terminal carries out data transmission.Therefore in the technical scheme of the application, it is used for when the USB interface of mobile terminal has been inserted into
After the USB cable charging, the power supply interface in USB interface has the presence of voltage, now each paster in the first control unit
Equally can there is voltage in the first control interface of relay, control circuit thinks and currently there occurs equipment even in this case
Take over a job part；And for OTG storage device, itself not possessing function of supplying power, OTG storage device is being inserted by therefore user
After the USB interface of mobile terminal, need to open OTG function on mobile terminals, now the mainboard of mobile terminal will receive user
The control instruction sending, afterwards mainboard chip corresponding OTG sent to control circuit according to the content of control instruction connect instruction
Signal, control circuit, when receiving this OTG connection indication signal, also will be considered that and there occurs equipment connection event.
Therefore, in the preferred embodiment of the application, the type of equipment connection event is set at least to include power supply set
Standby insertion and the insertion of OTG equipment, and control circuit to judge that the current mode that equipment connection event occurs also comprises following two：
(1) exist more than default threshold in the first control interface of each paster relay in the first control unit when detecting
During the voltage of value, control circuit confirms that the type of equipment connection event is inserted for power supply unit；
(2) when the OTG receiving mainboard chip transmission connects indication signal, control circuit confirms equipment connection event
Type is inserted for OTG equipment；
Wherein, OTG connects indication signal and is used for indicating each paster relay in the second control unit for the control circuit
Increase the voltage more than predetermined threshold value at first control interface.
It should be noted that for above two equipment connection event control circuit turn on USB interface working interface with
The mode of the passage between the working interface of Mobile terminal main board chip is different.
For power supply unit insertion, because power supply unit can carry out voltage output, therefore when power supply unit inserts, meeting
Applied voltage on the power supply interface of USB interface, now in the first control unit, the first control interface of each paster relay
Place equally can there is voltage, when this voltage exceedes default threshold value, it will by each paster relay turn on, thus realize by
Channel conductive between the working interface of the working interface of USB interface and Mobile terminal main board chip.
For the insertion of OTG equipment, because power supply unit can not carry out voltage output, therefore user is inciting somebody to action in this application
After OTG storage device inserts the USB interface of mobile terminal, need to open OTG function on mobile terminals, now mobile terminal
Mainboard will receive the control instruction of user's transmission, and mainboard chip sends accordingly to control circuit according to the content of control instruction afterwards
OTG connect indication signal, control circuit receive OTG connect indication signal when, it will respectively paste in the first control unit
Applied voltage at first control interface of piece relay, to turn on to each paster relay, thus realize USB interface
Channel conductive between the working interface of working interface and Mobile terminal main board chip.
Based on the different equipment connection event of both the above, the technical scheme of the application is provided with accordingly in control circuit
Control unit such that it is able to by the working interface of corresponding USB interface and mobile terminal under different equipment connection events
Channel conductive between the working interface of mainboard chip.
Although it should be noted that in the application preferred embodiment using power supply unit insertion and OTG equipment insertion as
Equipment connection event illustrates and illustrates, but these broadly fall into the preferred implementation of the application, on this basis, its
The mode of what he was similar to belong to equipment connection event also belongs to the protection domain of the application.
S102, when generation equipment extracts event, control circuit is by the work of the working interface of USB interface and mainboard chip
Passage between interface disconnects.
In the preferred embodiment of application, the type that equipment extracts event at least includes：Control circuit connects from mainboard chip
Receive OTG and disconnect indication signal, the current OTG device losses connecting, the power supply interface no given voltage of USB interface.
Wherein, OTG disconnects indication signal and is used for indicating that control circuit removes each paster relay in the second control unit
Voltage at device first control interface.
Accordingly, event is extracted for different equipment, control circuit disconnects working interface and the mainboard chip of USB interface
Working interface between the mode of passage be different.
For the power supply interface no given voltage of USB interface, during loss of voltage at the power supply interface of USB interface, say
Bright power supply unit has been extracted, and now the voltage at the first control interface of each paster relay in the first control unit also can disappear
Lose, due to not having the presence of voltage, each paster relay will return to the state of disconnection, thus realizing the work of USB interface
Passage between interface and the working interface of mainboard chip disconnects.
From mainboard chip, OTG is received for control circuit and disconnects indication signal and the current OTG device losses connecting,
User, when extracting OTG equipment, needs to close OTG function on mobile terminals, now the mainboard of mobile terminal in this application
The control instruction of user's transmission will be received, mainboard chip sends accordingly to control circuit according to the content of control instruction afterwards
OTG disconnects indication signal, and control circuit is when receiving OTG disconnection indication signal, it will remove each in the first control unit
Voltage at first control interface of paster relay, so that each paster relay returns to the state of disconnection, thus realize USB
Passage between the working interface of interface and the working interface of mainboard chip disconnects.
Based on discussed above, now illustrate the scheme of the application, in the working interface of USB interface and the work of mainboard chip
Make to increase paster relay on the circuit between interface, and when no equipment connects at USB interface, paster relay disconnected,
The circuit between USB working interface and the working interface of mainboard chip is made to be in the state of disconnection.Because this circuit is to disconnect,
Even if therefore now there being conducting liquid to enter so that USB pin short circuit does not result in this line short yet.
By taking above technical scheme, control circuit is set between the USB interface of mobile terminal and mainboard chip, this
Control circuit is used for controlling the connected state of the passage between the working interface of USB interface and the working interface of mainboard chip.When
When judging generation equipment connection event, control circuit is by between the working interface of USB interface and the working interface of mainboard chip
Channel conductive；When judging that generation equipment extracts event, control circuit is by the work of the working interface of USB interface and mainboard chip
Passage cut-out between interface.Due to when not having equipment to access, the working interface of USB interface and the working interface of mainboard chip
Between passage be cut-off, therefore, though now have conducting liquid enter so that the working interface short circuit of USB, also will not
The conducting of mobile terminal whole power circuit is led to cause the short circuit of power circuit.Thus can make the USB interface of mobile terminal can
Not prevent liquid from producing impact to the internal circuit of mobile terminal by other external auxiliary parts.
In order to the technological thought of the present invention is expanded on further, in conjunction with specific application scenarios, the technical side to the present invention
Case illustrates.As shown in Fig. 2 the logic control circuit of the mobile terminal being proposed by the application specific embodiment is illustrated
Figure, mainly by mobile phone USB interface, USB control logic control circuit and mobile phone OTG circuit control composition.Each electricity therein
The annexation of road device is as follows：
In the logic control circuit of Fig. 2, paster relay K1, K2, K3 and K4 form the first control unit, in the first control
In unit processed, the first control interface of each paster relay is connected with the power supply interface (VCC interface) of USB interface, the second control
Interface is connected with the ground interface (GND interface) of USB interface, and the public end interface of K1, K2, K3 and K4 is respectively with USB's
VCC interface, D- interface, D+ interface and GND interface are connected, normally opened pin interface respectively with the power supply chip of cell phone mainboard
PUM-VBUS interface, PUM-GND interface, IC-D+ interface and IC-D- interface connect, and control signal is carried by the VCC interface of USB
For；Paster relay K5, K6, K7 and K8 form the second control unit, in the second control unit, the first of each paster relay
Control interface is connected with the power supply interface of mainboard chip, and the second control interface is connected with the ground interface of mainboard chip, and pastes
The common port of piece relay K5, K6, K7 and K8 is connect with the PUM-VBUS interface of the power supply chip of cell phone mainboard, PUM-GND respectively
Mouth, IC-D+ interface and IC-D- interface connect；Normally opened pin interface respectively with the VCC interface of USB, D- interface, D+ interface with
And GND interface is connected, control signal is sent to control electricity by the chip pin OTG_CONTRL of mainboard after being amplified by signal
Road.
Based on above-mentioned annexation, this specific embodiment proposes mobile terminal respectively and sets for externally fed and OTG
The standby different processing scheme schematic flow sheet accessing, respectively as shown in Figure 3A and 3B, idiographic flow and being described as follows：
(1) externally fed equipment insertion USB interface
As shown in Figure 3A, when inserting power supply unit, the VCC seam of USB interface has 5V voltage, and this voltage can equally can
It is applied in first control interface of paster relay K1, K2, K3 and K4, in the presence of this voltage, paster relay K1,
K2, K3 and K4 will be switched on, now on the VCC interface in USB interface, GND interface, D+ interface and D- interface and mainboard
Passage between PUM-VBUS interface, PUM-GND interface, IC-D+ interface and IC-D- interface will be switched on, and therefore powers
Equipment can be attached normally being charged and communicating with mobile terminal, when USB end power supply unit is extracted, paster relay
In device K1, K2, K3 and K4 first control interface, voltage also can disappear therewith, and paster relay K1, K2, K3 and K4 will return to disconnected
The state opened, now the PUM-VBUS on the VCC interface in USB interface, GND interface, D+ interface and D- interface and mainboard connect
Passage between mouth, PUM-GND interface, IC-D+ interface and IC-D- interface will be disconnected, it is achieved that by USB interface
Working interface and interior of mobile phone USB circuit isolation, even if mobile phone is immersed in water, be also not result in cell phone mainboard damage.
(2) OTG equipment insertion USB interface
As shown in Figure 3 B, when inserting OTG equipment, line activating is entered to OTG by the setting interface of mobile phone, that is, to OTG_
CONTRL is operated, and now, the OTG that control circuit receives mainboard chip transmission connects indication signal, and according to instruction letter
Number content pass through PUM-VBUS circuit first control interface of each paster relay in the second control unit on applied voltage,
In the presence of this voltage, paster relay K5, K6, K7 and K8 will be switched on, now the VCC interface in USB interface, GND
PUM-VBUS interface on interface, D+ interface and D- interface and mainboard, PUM-GND interface, IC-D+ interface and IC-D- connect
Passage between mouthful will be switched on, and therefore mobile terminal can be attached normally being charged and communicating with OTG equipment,
When the OTG that control circuit receives mainboard chip transmission disconnects indication signal (OTG equipment is extracted), control circuit will be applying
In first control interface of each paster relay in second control unit, voltage is removed, now paster relay K5, K6, K7 and K8
The state of disconnection will be returned to, now on the VCC interface in USB interface, GND interface, D+ interface and D- interface and mainboard
Passage between PUM-VBUS interface, PUM-GND interface, IC-D+ interface and IC-D- interface will be disconnected, and therefore realizes
By the working interface of USB interface and the isolation of interior of mobile phone USB circuit, even if mobile phone is immersed in water, also it is not result in mobile phone
Mainboard damages.
By the description of above specific embodiment, arrange between the USB interface of mobile terminal and mainboard chip
Control circuit, this control circuit is used for controlling the passage between the working interface of USB interface and the working interface of mainboard chip
Connected state.When judging generation equipment connection event, control circuit is by the work of the working interface of USB interface and mainboard chip
Channel conductive between interface；When judging that generation equipment extracts event, control circuit is by the working interface of USB interface and mainboard
Passage cut-out between the working interface of chip.Due to when not having equipment to access, the working interface of USB interface and mainboard chip
Working interface between passage be cut-off, therefore, even if now there being conducting liquid to enter so that the working interface of USB
Short circuit, is also not result in that the conducting of mobile terminal whole power circuit causes the short circuit of power circuit.Thus mobile terminal can be made
USB interface can not prevent liquid from producing impact to the internal circuit of mobile terminal by other external auxiliary parts.
For reaching above technical purpose, the invention allows for a kind of mobile terminal, as shown in figure 4, this mobile terminal bag
Include including USB interface, control circuit and mainboard chip, described control circuit is used for controlling the working interface of described USB interface
The connected state of the passage and the working interface of described mainboard chip between, wherein, described control circuit includes：
Conduction module 421, when judging generation equipment connection event, by the working interface of described USB interface and described master
Channel conductive between the working interface of board chip；
Cut-out module 422, when judging that generation equipment extracts event, by the working interface of described USB interface and described master
Passage between the working interface of board chip disconnects.
In specific application scenarios, described control circuit includes the first control unit and the second control unit, and described
One control unit is made up of multiple paster relays, and described second control unit is made up of multiple paster relays, described paster
The interface of relay includes public end interface, normally opened pin interface, the first control interface and the second control interface.
In specific application scenarios, the first control interface of the paster relay in described first control unit with described
The power supply interface of USB interface is connected, and the second control interface of the paster relay in described first control unit and described USB connect
Mouthful ground interface be connected, the public end interface of the paster relay in described first control unit and the work of described USB interface
Make interface to be connected, the normally opened pin interface of the paster relay in described first control unit and the work of described mainboard chip connect
Mouth is connected；
First control interface of the paster relay in described second control unit and the power supply interface of described mainboard chip
It is connected, the second control interface of the paster relay in described second control unit and the ground interface phase of described mainboard chip
Even, the public end interface of the paster relay in described second control unit is connected with the working interface of described mainboard chip, institute
The normally opened pin interface stating the paster relay in the second control unit is connected with the working interface of described USB interface.
In specific application scenarios, the type of described equipment connection event at least includes power supply unit insertion and OTG
Equipment insert, described conduction module specifically for：
Exist more than default in first control interface of each paster relay in described first control unit when detecting
During the voltage of threshold value, confirm that the type of described equipment connection event is described power supply unit insertion；
When receiving the OTG connection indication signal that described mainboard chip sends, confirm the class of described equipment connection event
Type is described OTG equipment insertion；
Wherein, described OTG connects indication signal and is used for indicating that described control circuit is each in described second control unit
Increase the voltage more than predetermined threshold value at first control interface of paster relay.
In specific application scenarios, the type that described equipment extracts event at least includes：
Described control circuit receives OTG disconnection indication signal, the current OTG equipment connecting that described mainboard chip sends
Loss, the power supply interface no-voltage of described USB interface.
By applying the technical scheme of the application, setting between the USB interface of mobile terminal and mainboard chip controls electricity
Road, this control circuit is used for controlling the connected state of the passage between the working interface of USB interface and the working interface of mainboard chip
State.When judging generation equipment connection event, control circuit by the working interface of the working interface of USB interface and mainboard chip it
Between channel conductive；When judging that generation equipment extracts event, control circuit is by the working interface of USB interface and mainboard chip
Passage cut-out between working interface.Due to when not having equipment to access, the working interface of USB interface and the work of mainboard chip
Passage between interface is cut-off, therefore, even if now there being conducting liquid to enter so that the working interface short circuit of USB,
It is not result in that the conducting of mobile terminal whole power circuit causes the short circuit of power circuit.Thus the USB of mobile terminal can be made to connect
Mouth can not prevent liquid from producing impact to the internal circuit of mobile terminal by other external auxiliary parts.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be led to
Cross hardware to realize it is also possible to the mode by software plus necessary general hardware platform to be realized.Based on such understanding, this
Bright technical scheme can be embodied in the form of software product, and this software product can be stored in non-volatile memories
Medium (can be CD-ROM, USB flash disk, portable hard drive etc.) in, including some instructions with so that a computer equipment (can be
Personal computer, server, or network equipment etc.) execution each implement scene of the present invention described in method.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram being preferable to carry out scene, the module in accompanying drawing or
Flow process is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that module in device in implement scene can according to implement scene describe into
Row is distributed in the device of implement scene it is also possible to carry out one or more dresses that respective change is disposed other than this implement scene
In putting.The module of above-mentioned implement scene can merge into a module it is also possible to be further split into multiple submodule.
The invention described above sequence number is for illustration only, does not represent the quality of implement scene.
Only the several of the present invention disclosed above are embodied as scene, but, the present invention is not limited to this, Ren Heben
What the technical staff in field can think change all should fall into protection scope of the present invention.
Claims (10)
1. a kind of USB interface waterproof method is it is characterised in that comprise USB interface, control circuit and mainboard core in mobile terminal
Piece, described control circuit is used for controlling leading between the working interface of described USB interface and the working interface of described mainboard chip
The connected state in road, the method includes：
When judging generation equipment connection event, described control circuit is by the working interface of described USB interface and described mainboard core
Channel conductive between the working interface of piece；
When judging that generation equipment extracts event, described control circuit is by the working interface of described USB interface and described mainboard core
Passage cut-out between the working interface of piece.
2. the method for claim 1 it is characterised in that
Described control circuit includes the first control unit and the second control unit, and described first control unit is by multiple paster relays
Device forms, and described second control unit is made up of multiple paster relays, and the interface of described paster relay includes public termination
Mouth, normally opened pin interface, the first control interface and the second control interface.
3. method as claimed in claim 2 it is characterised in that
First control interface of the paster relay in described first control unit is connected with the power supply interface of described USB interface,
Second control interface of the paster relay in described first control unit is connected with the ground interface of described USB interface, described
The public end interface of the paster relay in the first control unit is connected with the working interface of described USB interface, described first control
The normally opened pin interface of the paster relay in unit processed is connected with the working interface of described mainboard chip；
First control interface of the paster relay in described second control unit is connected with the power supply interface of described mainboard chip,
Second control interface of the paster relay in described second control unit is connected with the ground interface of described mainboard chip, described
The public end interface of the paster relay in the second control unit is connected with the working interface of described mainboard chip, described second control
The normally opened pin interface of the paster relay in unit processed is connected with the working interface of described USB interface.
4. method as claimed in claim 3 is it is characterised in that the type of described equipment connection event at least includes power supply unit
Insertion and the insertion of OTG equipment, described control circuit judges current generation equipment connection event, specially：
It is more than predetermined threshold value when detecting to exist in the first control interface of each paster relay in described first control unit
Voltage when, described control circuit confirms that the type of described equipment connection event is described power supply unit insertion；
When receiving the OTG connection indication signal that described mainboard chip sends, described control circuit confirms that described equipment connects
The type of event is described OTG equipment insertion；
Wherein, described OTG connects indication signal and is used for indicating each paster in described second control unit for the described control circuit
Increase the voltage more than predetermined threshold value at first control interface of relay.
5. the method for claim 1 is it is characterised in that the type that described equipment extracts event at least includes：
Described control circuit receives the described mainboard chip OTG disconnection indication signal sending, the OTG equipment currently connecting is lost
Mistake, the power supply interface no-voltage of described USB interface.
6. a kind of mobile terminal it is characterised in that including USB interface, control circuit and mainboard chip, use by described control circuit
The connected state of the passage between the working interface controlling described USB interface and the working interface of described mainboard chip, wherein,
Described control circuit includes：
Conduction module, when judging generation equipment connection event, by the working interface of described USB interface and described mainboard chip
Channel conductive between working interface；
Cut-out module, when judging that generation equipment extracts event, by the working interface of described USB interface and described mainboard chip
Passage between working interface disconnects.
7. mobile terminal as claimed in claim 6 it is characterised in that
Described control circuit includes the first control unit and the second control unit, and described first control unit is by multiple paster relays
Device forms, and described second control unit is made up of multiple paster relays, and the interface of described paster relay includes public termination
Mouth, normally opened pin interface, the first control interface and the second control interface.
8. mobile terminal as claimed in claim 7 it is characterised in that
First control interface of the paster relay in described first control unit is connected with the power supply interface of described USB interface,
Second control interface of the paster relay in described first control unit is connected with the ground interface of described USB interface, described
The public end interface of the paster relay in the first control unit is connected with the working interface of described USB interface, described first control
The normally opened pin interface of the paster relay in unit processed is connected with the working interface of described mainboard chip；
First control interface of the paster relay in described second control unit is connected with the power supply interface of described mainboard chip,
Second control interface of the paster relay in described second control unit is connected with the ground interface of described mainboard chip, described
The public end interface of the paster relay in the second control unit is connected with the working interface of described mainboard chip, described second control
The normally opened pin interface of the paster relay in unit processed is connected with the working interface of described USB interface.
9. mobile terminal as claimed in claim 8 is it is characterised in that the type of described equipment connection event at least includes powering
Equipment insertion and OTG equipment insertion, described conduction module specifically for：
It is more than predetermined threshold value when detecting to exist in the first control interface of each paster relay in described first control unit
Voltage when, confirm that the type of described equipment connection event is the insertion of described power supply unit；
When receiving the OTG connection indication signal that described mainboard chip sends, confirm that the type of described equipment connection event is
Described OTG equipment insertion；
Wherein, described OTG connects indication signal and is used for indicating each paster in described second control unit for the described control circuit
Increase the voltage more than predetermined threshold value at first control interface of relay.
10. mobile terminal as claimed in claim 7 is it is characterised in that the type that described equipment extracts event at least includes：
Described control circuit receives the described mainboard chip OTG disconnection indication signal sending, the OTG equipment currently connecting is lost
Mistake, the power supply interface no-voltage of described USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610805927.1A CN106412245B (en) | 2016-09-06 | 2016-09-06 | USB interface waterproof method and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610805927.1A CN106412245B (en) | 2016-09-06 | 2016-09-06 | USB interface waterproof method and mobile terminal |
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| CN106412245B CN106412245B (en) | 2021-02-26 |
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| CN106412245B (en) | 2021-02-26 |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |
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