CN205666897U - Sound video playing device of compatible USB power supply and OTG output function - Google Patents
Sound video playing device of compatible USB power supply and OTG output function Download PDFInfo
- Publication number
- CN205666897U CN205666897U CN201620543173.2U CN201620543173U CN205666897U CN 205666897 U CN205666897 U CN 205666897U CN 201620543173 U CN201620543173 U CN 201620543173U CN 205666897 U CN205666897 U CN 205666897U
- Authority
- CN
- China
- Prior art keywords
- usb
- pin
- resistance
- power supply
- otg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Controls And Circuits For Display Device (AREA)
Abstract
The utility model discloses a sound video playing device of compatible USB power supply and OTG output function, the impedance testing device comprises a detection circuit, switch circuit and voltage conversion circuit, switch circuit is including being used for judging and selecting USB to charge or the switch unit of OTG output and the the control unit that is used for controlling the switch unit, the switch unit includes a MOS pipe, the 3rd MOS pipe and the 5th resistance, the control unit includes first triode and the 6th resistance, the base of first triode is connected with detection circuitry through the 6th resistance, voltage conversion circuit and USB power supply are connected, a power supply voltage for inciting somebody to action battery voltage converts into stably for the external equipment power supply. Implement the utility model discloses a sound video playing device of compatible USB power supply and OTG output function has following beneficial effect: compatible USB power supply and OTG export, can regard as a solitary power to supply power to external equipment sound video playing device.
Description
Technical field
This utility model relates to electronic device field, powers particularly to a kind of compatible USB and OTG (On-The-Go) is defeated
Go out the audio and video display device of function.
Background technology
For audio and video display device, such as: MP4, MP4 are a kind of portable Multifunctional music players, this
Plant music player and can listen music, recording, radio reception, see picture, video and reading electronic book, store file.When user is deposited
Storage music file, after video file waits until MP4, can listen music anywhere or anytime, see video etc..Outside prior art having a lot
Portion's equipment uses USB interface, and such as: USB small fan, existing audio and video display device and external equipment are two independent products
Product, wherein, audio and video display device needs external power source to be powered by USB interface to charge the battery, and battery is only for supplying electricity to
Internal electronic devices and components；After external equipment needs external power source to power, drive motor rotates.Audio and video display device is at present
Internal battery cannot power to other outside equipment as a power supply by the circuit of like product.Traditional audio frequency and video
Playing device does not possess OTG function, it is impossible to powered as a single power supply to external equipment by audio and video display device.Want
Realize the battery of audio and video display device as a power supply, connect other equipment outside by USB interface, supply to external equipment
The technological difficulties of electricity are: in the design circuit of traditional audio and video display device, a permission external power source is defeated by USB interface
Enter, do not allow power supply to be exported by USB interface, if none of reasonably judging, powering to external equipment by force, may
The CPU on circuit board can be caused to burn out.
Utility model content
The technical problems to be solved in the utility model is, for prior art above-mentioned do not possess OTG function, cannot be by
The defect that audio and video display device is powered to external equipment as a single power supply, it is provided that a kind of compatible USB powers and OTG
Export, audio and video display device can be powered and OTG output to the compatible USB that external equipment is powered as a single power supply
The audio and video display device of function.
This utility model solves its technical problem and be the technical scheme is that a kind of compatible USB of structure powers and OTG is defeated
Going out the audio and video display device of function, including testing circuit, on-off circuit and voltage conversion circuit, described on-off circuit includes using
In judging and select USB charging or the power switch unit of OTG output and for controlling the control list of described power switch unit
Unit, described power switch unit includes the first metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor and the 5th resistance, the grid of described first metal-oxide-semiconductor and institute
The grid stating the 3rd metal-oxide-semiconductor connects, and the source electrode of described first metal-oxide-semiconductor connects DC source, the drain electrode of described first metal-oxide-semiconductor and institute
The drain electrode stating the 3rd metal-oxide-semiconductor connects, and the source electrode of described 3rd metal-oxide-semiconductor connects USB power supply, the source electrode of described 3rd metal-oxide-semiconductor
Being connected with its grid also by described 5th resistance, described control unit includes the first audion and the 6th resistance, described first
The base stage of audion is connected with described testing circuit by described 6th resistance, the colelctor electrode of described first audion and described the
The grid of three metal-oxide-semiconductors connects, and described voltage conversion circuit is connected with described USB power supply, is used for converting battery voltage to
The stable supply voltage powered for external equipment.
Power and in the audio and video display device of OTG output function at compatible USB described in the utility model, described detection
Circuit includes USB interface, the second resistance and the 3rd resistance, and the 4th pin of described USB interface is connected by described second resistance
USB-ID port, described 6th resistance is connected with described USB-ID port, and the 4th pin of described USB interface is also with the described 3rd
Resistance connects.
Power and in the audio and video display device of OTG output function, when external at compatible USB described in the utility model
When USB powers, the 4th pin of described USB interface and the 5th pin disconnect, and described USB-ID port is high level；When external
During OTG equipment, the 4th pin of described USB interface and the 5th pin form path, are directly grounded, and described USB-ID port is
Low level.
Power and in the audio and video display device of OTG output function at compatible USB described in the utility model, described voltage
Change-over circuit include the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the second inductance, boost chip, the 3rd diode, the 7th resistance,
8th resistance and the 9th resistance, the 4th pin of described boost chip is by described second inductance connection cell voltage, described liter
The 4th pin also anode with described 3rd diode of pressure chip is connected, and the 5th pin of described boost chip passes through described the
Four capacity earths, the 5th pin of described boost chip is also connected with described cell voltage, and described 3rd diode is by described the
Nine resistance connect described USB power supply, and the 6th pin of described boost chip is respectively by described second electric capacity and the 7th electricity
Resistance connects described USB power supply, and the 6th pin of described boost chip is also by described 8th resistance with its 3rd pin even
Connecing, described 3rd electric capacity is connected with described USB power supply.
Power and in the audio and video display device of OTG output function, when described liter at compatible USB described in the utility model
When first pin of pressure chip is high level, the 4th pin sine wave output signal of described boost chip.
Power and in the audio and video display device of OTG output function at compatible USB described in the utility model, described USB
First pin of interface is connected with described USB power supply.
Power at compatible USB described in the utility model and in the audio and video display device of OTG output function, also include preventing
Electrostatic circuit, described anti-static circuit includes the first bilateral diode, the second bilateral diode and the 3rd bilateral diode, described
One end of first bilateral diode is connected with the 3rd pin of described USB interface, one end of described second bilateral diode and institute
The second pin stating USB interface connects, and described one end of 3rd bilateral diode is connected with the first pin of described USB interface,
The other end of the other end of described first bilateral diode, the other end of the second bilateral diode and the 3rd bilateral diode all connects
Ground.
Power and in the audio and video display device of OTG output function at compatible USB described in the utility model, also include the
One filter capacitor, one end of described first filter capacitor is connected with described DC source, the other end of described first filter capacitor
Ground connection.
Power and in the audio and video display device of OTG output function at compatible USB described in the utility model, described USB
The voltage of power supply is 5V, and the described supply voltage powered for external equipment is 5V.
Power and in the audio and video display device of OTG output function at compatible USB described in the utility model, described direct current
The voltage of power supply is 5V.
Implement compatible USB of the present utility model to power and the audio and video display device of OTG output function, have following useful
Effect: owing to using testing circuit, on-off circuit and voltage conversion circuit, on-off circuit includes power switch unit and controls single
Unit, power switch unit includes the first metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor and the 5th resistance, and control unit includes the first audion and the 6th
Resistance, when circumscribed USB is powered, the node that the 6th resistance is connected with testing circuit is high level, opens the first audion, drags down
One metal-oxide-semiconductor and the grid of the 3rd metal-oxide-semiconductor, the first metal-oxide-semiconductor and the conducting of the 3rd metal-oxide-semiconductor, power to late-class circuit, OTG output function
Time, the node that the 6th resistance is connected with testing circuit is low level, and the first audion cut-off, the first metal-oxide-semiconductor and the 3rd metal-oxide-semiconductor cut
Only, disconnecting late-class circuit and power, OTG exports only for USB, it is achieved USB OTG exports, and voltage conversion circuit can be by battery electricity
Pressure is converted to the stable supply voltage powered for external equipment, thus its compatible USB powers and OTG output, can be by audio frequency and video
Playing device is powered to external equipment as a single power supply.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that this utility model compatibility USB is powered and in one embodiment of audio and video display device of OTG output function
Circuit theory diagrams.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Power and in the audio and video display device embodiment of OTG output function in this utility model compatibility USB, this compatibility
The circuit theory diagrams of the audio and video display device that USB powers with OTG output function are as shown in Figure 1.In Fig. 1, this compatibility USB is powered
Testing circuit 11, on-off circuit and voltage conversion circuit 14, wherein, inspection is included with the audio and video display device of OTG output function
Slowdown monitoring circuit 11 is used for detecting USB and powers and OTG output, and on-off circuit is used for ensureing that machine USB powers with OTG output function not
Conflict, when voltage conversion circuit 14 is used for realizing OTG function, the supply voltage powered for external equipment that its output is stable, this
In embodiment, this stable supply voltage is 5V(i.e. USB5V).Certainly, under the certain situation of the present embodiment, this stable confession
The big I of piezoelectric voltage is different according to the difference of external equipment.
In the present embodiment, on-off circuit includes power switch unit 12 and control unit 13, and power switch unit 12 is used for
Judging and select USB charging or OTG output, control unit 13 is used for controlling power switch unit 12, and power switch unit 12 is wrapped
Including the first metal-oxide-semiconductor QB1, the 3rd metal-oxide-semiconductor QB3 and the 5th resistance RP5, the 5th resistance RP5 is three metal-oxide-semiconductor QB3 grid pull-up resistors.
The grid of the first metal-oxide-semiconductor QB1 and the grid of the 3rd metal-oxide-semiconductor QB3 connect, and the source electrode of the first metal-oxide-semiconductor QB1 connects DC source, this
In embodiment, the voltage of DC source is 5V(i.e. DC5V).Certainly, under the certain situation of the present embodiment, this DC source
Voltage can difference as the case may be and different.First metal-oxide-semiconductor QB1 and the 3rd metal-oxide-semiconductor QB3 is P-channel metal-oxide-semiconductor.
In the present embodiment, the drain electrode of the first metal-oxide-semiconductor QB1 is connected with the drain electrode of the 3rd metal-oxide-semiconductor QB3, the 3rd metal-oxide-semiconductor QB3's
Source electrode connects USB power supply, and the source electrode of the 3rd metal-oxide-semiconductor QB3 is connected with its grid also by the 5th resistance RP5.The present embodiment
In, the voltage of USB power supply is 5V(i.e. USB5V), under the certain situation of the present embodiment, the voltage of USB power supply can
Different according to the difference of audio and video display device.Control unit 13 includes the first audion QP1 and the 6th resistance RP6, the 6th
Resistance RP6 is current-limiting resistance, and the base stage of the first audion QP1 is connected with testing circuit 11 by the 6th resistance RP6, the one or three pole
The colelctor electrode of pipe QP1 and the grid of the 3rd metal-oxide-semiconductor QB3 connect, and voltage conversion circuit 14 is connected with USB power supply, being used for will
Cell voltage VBAT is converted to the stable supply voltage powered for external equipment.
In the present embodiment, when circumscribed USB is powered (on-off circuit circumscribed USB power supply, when i.e. USB5V powers), the
The node (i.e. USB-ID port) that six resistance RP6 are connected with testing circuit 11 is high level, opens the first audion QP1, drags down
First metal-oxide-semiconductor QB1 and the grid of the 3rd metal-oxide-semiconductor QB3, the first metal-oxide-semiconductor QB1 and the 3rd metal-oxide-semiconductor QB3 conducting, supply to late-class circuit
Electricity；When OTG output function, the node that the 6th resistance RP6 is connected with testing circuit 11 is low level, and the first audion QP1 cuts
Only, the first metal-oxide-semiconductor QB1 and the 3rd metal-oxide-semiconductor QB3 cut-off, disconnect late-class circuit and power, OTG exports only for USB, it is achieved USB
OTG output thus its compatible USB powers and OTG output, can using audio and video display device as a single power supply to outside
Equipment is powered.
In the present embodiment, testing circuit 11 includes USB interface JP1, the second resistance RP2 and the 3rd resistance RP3, wherein, USB
4th pin of interface JP1 connects USB-ID port by the second resistance RP2, and the 6th resistance RP6 and USB-ID port is connected,
4th pin of USB interface JP1 is also connected with the 3rd resistance RP3.When circumscribed USB is powered, the 4th pin of USB interface JP1
With the 5th pin disconnect, now USB-ID port is high level, when external OTG equipment, the 4th pin of USB interface JP1 and
5th pin path, is directly grounded, and USB-ID port is low level.First pin of USB interface JP1 is with USB power supply even
Connect.
In the present embodiment, voltage conversion circuit 14 include the second electric capacity CP2, the 3rd electric capacity CP3, the 4th electric capacity CP4, second
Inductance LZ2, boost chip U1, the 3rd diode DP3, the 7th resistance RP7, the 8th resistance RP8 and the 9th resistance RP9, the 9th electricity
Resistance RP9 is load current-limiting resistance, and the 3rd electric capacity CP3 is output filter capacitor, and the 4th pin of boost chip U1 is by the second electricity
Sense LZ2 connects cell voltage VBAT, and the 4th pin of boost chip U1 also anode with the 3rd diode DP3 is connected, boosting core
5th pin of sheet U1 passes through the 4th electric capacity CP4 ground connection, and the 5th pin of boost chip U1 is also connected with cell voltage VBAT, and the 3rd
Diode DP3 connects USB power supply by the 9th resistance RP9, and the 6th pin of boost chip U1 is respectively by the second electric capacity
CP2 and the 7th resistance RP7 connect USB power supply, the 6th pin of boost chip U1 also by the 8th resistance RP8 with its 3rd
Pin connects, and the 3rd electric capacity CP3 and USB power supply is connected.
In the present embodiment, cell voltage VBAT powers and filters, to boost chip U1 and the second inductance through the 4th electric capacity CP4
LZ2 powers, when the first pin of boost chip U1 is high level, and the 4th pin sine wave output signal of boost chip U1,
Realize boosting, the second electric capacity CP2, the 7th resistance RP7 and the 8th resistance RP8 through the 3rd diode DP3 and constitute feedback circuit, instead
Current feed circuit output voltage clamper at stable supply voltage (i.e. 5V).It is noted that in actual applications, can be according to tool
Body situation, makes voltage conversion circuit 14 realize boosting or buck functionality.
In the present embodiment, this compatibility USB is powered and the audio and video display device of OTG output function also includes anti-static circuit
15, the audio and video display device that anti-static circuit 15 is powered with OTG output function for preventing this compatibility USB is by electrostatic breakdown electricity
Son is expected and problem functionally is occurred.Anti-static circuit 15 include the first bilateral diode EP1, the second bilateral diode EP2 and
3rd bilateral diode EP3, one end of the first bilateral diode EP1 is connected with the 3rd pin of USB interface JP1, and second is two-way
One end of diode EP2 is connected with the second pin of USB interface JP1, one end of the 3rd bilateral diode EP3 and USB interface JP1
First pin connect, the other end of the first bilateral diode EP1, the other end of the second bilateral diode EP2 and the 3rd are two-way
The equal ground connection of the other end of diode EP3.
In the present embodiment, this compatibility USB is powered and the audio and video display device of OTG output function also includes the first filtered electrical
Holding CP1, the first filter capacitor CP1 and can ensure that DC5V stably exports, one end of the first filter capacitor CP1 is with DC source DC5V even
Connect, the other end ground connection of the first filter capacitor CP1.
By MP4 for example, traditional MP4 includes shell, display screen, circuit board and battery；Within shell protection MP4
Circuit board, display screen and battery；Display screen is connected with circuit board by winding displacement, the fileinfo of storage within showing MP4；Electricity
Road plate is provided with various electronic devices and components, and topmost components and parts are CPU and FLASH, and CPU is used for controlling each group of circuit, FLASH
For storing fileinfo, additionally USB interface is for transmitting to the charging of MP4 battery and information；The both positive and negative polarity of battery is connected to electricity
On the plate of road, power to each electronic devices and components on circuit board.When external equipment is USB small fan, outside USB small fan includes
Shell, USB interface, motor and air blade；Shell is used for protecting various part；USB interface is to power to motor for external power source
Input；Motor is powered rotational band wind symptom blade by external power source；When air blade rotates, can be with directing gas flow towards one
Direction is moved, thus forms air-flow.USB small fan is a kind of Portable fan, needs externally fed, when USB is connect by user
When mouth according to condition accesses other equipment or adapter, USB small fan can be made to operate, simple to operation.
In existing product, MP4 and USB small fan is two independent products, the battery of MP4 to be realized as a power supply,
By USB interface connect USB small fan, power to USB small fan, can by power supply export and input improvement of circuit,
Realize MP4 to power to USB small fan as a power supply, drive the rotation of USB small fan motor and air blade to form gas
Stream, allows MP4 user arrive, while entertaining, the effect relieved summer heat.Certainly, under the certain situation of the present embodiment, this compatibility USB
The audio and video display device of power supply and OTG output function is not limited only to MP4, it is also possible to be other kinds of audio and video playing
Device.External equipment is also not limited only to USB small fan, also with the equipment being other use USB interface.
Concrete, needing design judgment USB interface power supply is input or the circuit of output, also to design the electricity of output
Pressure is increased to the circuit of the rated operational voltage of USB small fan, and testing circuit 11, on-off circuit and voltage in the present embodiment turn
Change circuit 14 and just can realize above-mentioned functions.Become after above-mentioned testing circuit 11, on-off circuit and voltage conversion circuit 14 combination
Realize compatible USB 5V and the circuit of OTG 5V function.OTG 5V is only for USB, it is achieved USB 5V output supplies electricity to USB small fan,
Thus realize supplying electricity to MP4 as power supply the function of USB small fan.Compared with prior art, MP4 practicality merit is greatly improved
Can compatibility, it is ensured that the functional realiey of USB5V and OTG5V, do not conflict and the characteristic such as output voltage stabilization, occur without
CPU burns out, and circuit structure is simple.
In a word, in the present embodiment, compared with prior art, this compatibility USB is powered and the audio frequency and video of OTG output function are broadcast
Putting device and add testing circuit 11, in this testing circuit 11, the 4th pin of USB interface JP1 and the 5th pin are by original short
Road ground connection is revised as the 4th pin and is accessed the 3rd resistance RP3 and the second resistance RP2, increases the first audion QP1, the first metal-oxide-semiconductor
QB1 and the 3rd metal-oxide-semiconductor QB3, compatible circumscribed USB 5V is powered and OTG 5V exports.Add voltage conversion circuit 14, by electricity
The rated voltage being increased to USB small fan of the voltage stabilization of cell voltage VBAT.Delete outside straight charging circuit.In like product
Do not add these circuit, so the most not possessing the function that audio and video display device is powered as power supply.This utility model realizes
Would be compatible with USB to power and the audio and video display device of OTG output function is powered to external equipment as a single power supply
Function, add the practicality of product function.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in this utility model
Protection domain within.
Claims (10)
1. a compatible USB powers and the audio and video display device of OTG output function, it is characterised in that includes testing circuit, open
Closing circuit and voltage conversion circuit, described on-off circuit includes for judging and select USB charging or the on and off switch of OTG output
Unit and for controlling the control unit of described power switch unit, described power switch unit include the first metal-oxide-semiconductor, the 3rd
Metal-oxide-semiconductor and the 5th resistance, the grid of described first metal-oxide-semiconductor is connected with the grid of described 3rd metal-oxide-semiconductor, described first metal-oxide-semiconductor
Source electrode connects DC source, and the drain electrode of described first metal-oxide-semiconductor is connected with the drain electrode of described 3rd metal-oxide-semiconductor, described 3rd metal-oxide-semiconductor
Source electrode connects USB power supply, and the source electrode of described 3rd metal-oxide-semiconductor is connected with its grid also by described 5th resistance, described control
Unit processed includes the first audion and the 6th resistance, and the base stage of described first audion is by described 6th resistance and described detection
Circuit connects, and the colelctor electrode of described first audion is connected with the grid of described 3rd metal-oxide-semiconductor, described voltage conversion circuit and institute
State USB power supply to connect, for converting battery voltage to the stable supply voltage powered for external equipment.
Compatible USB the most according to claim 1 powers and the audio and video display device of OTG output function, it is characterised in that
Described testing circuit includes USB interface, the second resistance and the 3rd resistance, and the 4th pin of described USB interface passes through described second
Resistance connect USB-ID port, described 6th resistance is connected with described USB-ID port, the 4th pin of described USB interface also with
Described 3rd resistance connects.
Compatible USB the most according to claim 2 powers and the audio and video display device of OTG output function, it is characterised in that
When circumscribed USB is powered, the 4th pin of described USB interface and the 5th pin disconnect, and described USB-ID port is high level；
When external OTG equipment, the 4th pin of described USB interface and the 5th pin form path, are directly grounded, described USB-ID
Port is low level.
4. power according to the compatible USB described in claims 1 to 3 any one and the audio and video display device of OTG output function,
It is characterized in that, described voltage conversion circuit include the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the second inductance, boost chip,
3rd diode, the 7th resistance, the 8th resistance and the 9th resistance, the 4th pin of described boost chip passes through described second inductance
Connecting cell voltage, the 4th pin of described boost chip also anode with described 3rd diode is connected, described boost chip
The 5th pin by described 4th capacity earth, the 5th pin of described boost chip is also connected with described cell voltage, described
3rd diode connects described USB power supply by described 9th resistance, and the 6th pin of described boost chip passes through respectively
Described second electric capacity and the 7th resistance connect described USB power supply, and the 6th pin of described boost chip is also by described the
Eight resistance are connected with its 3rd pin, and described 3rd electric capacity is connected with described USB power supply.
Compatible USB the most according to claim 4 powers and the audio and video display device of OTG output function, it is characterised in that
When the first pin of described boost chip is high level, the 4th pin sine wave output signal of described boost chip.
6. powering according to the compatible USB described in Claims 2 or 3 and the audio and video display device of OTG output function, its feature exists
In, the first pin of described USB interface is connected with described USB power supply.
Compatible USB the most according to claim 6 powers and the audio and video display device of OTG output function, it is characterised in that
Also include that anti-static circuit, described anti-static circuit include the first bilateral diode, the second bilateral diode and the 3rd two-way two
Pole is managed, and one end of described first bilateral diode is connected with the 3rd pin of described USB interface, described second bilateral diode
One end is connected with the second pin of described USB interface, and described one end of 3rd bilateral diode is drawn with the first of described USB interface
Foot connects, the other end of described first bilateral diode, the other end of the second bilateral diode and the 3rd bilateral diode another
The equal ground connection in one end.
Compatible USB the most according to claim 7 powers and the audio and video display device of OTG output function, it is characterised in that
Also include that the first filter capacitor, one end of described first filter capacitor are connected with described DC source, described first filter capacitor
Other end ground connection.
Compatible USB the most according to claim 1 powers and the audio and video display device of OTG output function, it is characterised in that
The voltage of described USB power supply is 5V, and the described supply voltage powered for external equipment is 5V.
Compatible USB the most according to claim 1 powers and the audio and video display device of OTG output function, and its feature exists
In, the voltage of described DC source is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620543173.2U CN205666897U (en) | 2016-06-07 | 2016-06-07 | Sound video playing device of compatible USB power supply and OTG output function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620543173.2U CN205666897U (en) | 2016-06-07 | 2016-06-07 | Sound video playing device of compatible USB power supply and OTG output function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205666897U true CN205666897U (en) | 2016-10-26 |
Family
ID=57156450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620543173.2U Expired - Fee Related CN205666897U (en) | 2016-06-07 | 2016-06-07 | Sound video playing device of compatible USB power supply and OTG output function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205666897U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105828007A (en) * | 2016-06-07 | 2016-08-03 | 深圳市倍儿酷电子商务有限公司 | Audio and video playing device compatible to USB power supply and OTG output functions |
| CN107300965A (en) * | 2017-05-12 | 2017-10-27 | 青岛海信移动通信技术股份有限公司 | The implementation method and device of a kind of USB interface waterproof |
-
2016
- 2016-06-07 CN CN201620543173.2U patent/CN205666897U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105828007A (en) * | 2016-06-07 | 2016-08-03 | 深圳市倍儿酷电子商务有限公司 | Audio and video playing device compatible to USB power supply and OTG output functions |
| CN105828007B (en) * | 2016-06-07 | 2019-04-05 | 深圳市倍儿酷电子商务有限公司 | A kind of audio and video display device of compatible USB power supply and OTG output function |
| CN107300965A (en) * | 2017-05-12 | 2017-10-27 | 青岛海信移动通信技术股份有限公司 | The implementation method and device of a kind of USB interface waterproof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203933124U (en) | A kind of single interface portable power source, bluetooth keyboard and protective sleeve | |
| CN105828007B (en) | A kind of audio and video display device of compatible USB power supply and OTG output function | |
| CN206272219U (en) | A kind of overvoltage and reverse-connection protection circuit and its equipment | |
| CN103812197B (en) | Mobile power supply | |
| CN208479470U (en) | Adjustable voltage output circuit | |
| CN104953650B (en) | A kind of battery electric quantity display device | |
| CN204441888U (en) | A kind of two-wire electronic switch off-state power supply circuits and intelligent switch | |
| CN205666897U (en) | Sound video playing device of compatible USB power supply and OTG output function | |
| WO2012171494A1 (en) | Audio signal transfer device | |
| CN104682388A (en) | Off-state power supply circuit for two-wire system electronic switch and intelligent switch | |
| WO2012171492A1 (en) | Audio signal receiving and transferring device | |
| CN207150798U (en) | Stereo set | |
| CN103683266B (en) | Rechargeable battery protection circuit | |
| CN203027445U (en) | Portable solar sound device | |
| CN104658592A (en) | Large-power audio playing circuit and audio playing device | |
| CN203407010U (en) | Audio playing circuit and audio playing device | |
| CN206039739U (en) | HOSTUSB function sharing circuit that charges | |
| CN203911828U (en) | Drive board control circuit | |
| CN204632339U (en) | A kind of high-power audio playing circuit and audio playing apparatus | |
| CN207124349U (en) | A kind of concentrating socket box | |
| CN204761070U (en) | Battery power display device | |
| CN208028617U (en) | The embedded power supply and electric furniture of electric furniture | |
| CN209233503U (en) | A kind of AC-DC chip self-powered circuit and charger | |
| CN105704613A (en) | Multifunctional sound box | |
| CN207625292U (en) | Power supply switch circuit and TV power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161026 Termination date: 20190607 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |