CN104090860A - Display device and operating method thereof - Google Patents

Display device and operating method thereof Download PDF

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Publication number
CN104090860A
CN104090860A CN201410320373.7A CN201410320373A CN104090860A CN 104090860 A CN104090860 A CN 104090860A CN 201410320373 A CN201410320373 A CN 201410320373A CN 104090860 A CN104090860 A CN 104090860A
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equipment
display device
pin position
power supply
interface
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CN201410320373.7A
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CN104090860B (en
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范泽崴
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Qisda Suzhou Co Ltd
Qisda Corp
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Qisda Suzhou Co Ltd
Qisda Corp
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Abstract

The invention provides a display device. The display device comprises a screen, a first interface, a data switching unit and a processing unit. The screen is used for displaying images including the human-computer interface. The first interface is provided with a first power supply pin position and is used for being connected with first equipment. The processing unit is used for receiving a switching instruction sent by the human-computer interface, controlling the data switching unit and the first power supply pin position to selectively switch the first equipment into master equipment or slave equipment according to the switching instruction and controlling the first power supply pin position to provide power for the first equipment when the first equipment is the master equipment.

Description

A kind of display device and method of operating thereof
Technical field
The present invention relates to field of display devices, relate in particular to a kind of display device that can charge for the running gear connecting.
Background technology
Along with scientific and technological development; possessing the running gears such as the mobile phone of OTG (On-The-Go) function and image output function or flat computer is widely used by people; but due to display screen size and the port number quantitative limitation of mobile phone or flat computer, user often can use display and running gear collocation.USB on running gear (Universal Serial Bus, USB (universal serial bus)) OTG does not need by counter USB device, can reach the function that plural USB device connects and communicates by letter.When running gear utilizes its USB OTG function, when running gear is during as OTG main equipment, running gear need to provide electric energy for example, to from equipment (, keyboard, mouse, Portable disk etc.) use, but because the electric energy of running gear storage itself is limited, therefore, to offer from the electric energy of equipment be also limited to running gear.And in prior art, after running gear collocation display, running gear can not be controlled the desktop of running gear, causes and uses inconvenience.
Summary of the invention
One of object of the present invention is to provide a kind of display device and method of operating thereof, to address the above problem.
On the one hand, the invention provides a kind of display device, this display device comprises:
Screen, for display frame, this picture comprises man-machine interface;
First interface, has the first power supply pin position, and this first interface is used for connecting the first equipment;
Data exchange unit;
Processing unit, the switching command sending for receiving this man-machine interface, and controlling this data exchange unit and this first power supply pin position according to this switching command, optionally to switch this first equipment be main equipment or from equipment, and when this first equipment, control this first pin position that powers during for main equipment and provide electric energy for this first equipment.
Preferably, this display device also comprises:
The second interface, has the second power supply pin position, and this second interface is used for connecting the second equipment;
This processing unit, provides electric energy for control this first power supply pin position and this second power supply pin position during for this main equipment when this first equipment for this first equipment.
Preferably, this display device also comprises:
At least one the 3rd interface, this at least one the 3rd interface is used for connecting at least one the 3rd equipment;
When this at least one the 3rd equipment that at least one the 3rd interface connects when this comprises keyboard and mouse, this main equipment is carried out corresponding operation according to the control information of this keyboard and the transmission of this mouse.
Preferably, when this processing unit receives the first switching command that this man-machine interface sends, this processing unit is controlled this data exchange unit and this first, and to power that pin position this second equipment is connected with the communication of this display device makes this first equipment in closed condition be this main equipment; When this processing unit receives the second switching command that this man-machine interface sends, this processing unit is controlled this data exchange unit and this first pin position that powers and is set up this display device to be connected to make this second equipment with the communication of this second equipment be this main equipment.
Preferably, this data exchange unit comprises the first data switching module and the second data switching module, and this first data switching module has the 3rd power supply pin position, and this second data switching module has the 4th power supply pin position; This processing unit, the switching command sending for receiving this man-machine interface, and optionally switch this first equipment for this main equipment or should be from equipment according to the electromotive force that this switching command is controlled the 3rd power supply pin position, the 4th power supply pin position and this first power supply pin position.
Preferably, in this man-machine interface, comprise button, this button is used for sending this switching command.
Preferably, this display device also comprises pilot lamp, and whether this pilot lamp is used to indicate the current main equipment of this display device is this first equipment.
Preferably, when this button sends this first switching command, this processing unit is controlled this pilot lamp in illuminating state, and controlling this data exchange unit and this first power supply pin position, to make this first equipment be this main equipment, controls this first pin position that powers and provides electric energy for this first equipment; When this button sends this second switching command, this processing unit is controlled this pilot lamp in extinguishing state, controls this data exchange unit and makes this first equipment for being somebody's turn to do from equipment with this first power supply pin position.
Preferably, this button acquiescence is in opening, and when this button is during in this opening, this processing unit is controlled this data exchange unit and this first power supply pin position, and to make this first equipment be this main equipment.
Preferably, this first equipment is running gear, and this second equipment is computing machine.
Preferably, this display device also comprises field effect transistor; This processing unit is for controlling this data exchange unit according to this switching command and controlling this field effect transistor optionally to switch this first equipment be main equipment or from equipment by controlling this first power supply pin position, and by controlling this first pin position that powers, controls this field effect transistor and provide electric energy for this first equipment during for main equipment when this first equipment.
On the other hand, the present invention also provides a kind of method of operating of display device, and for display device, this display device comprises screen, and this screen is for display frame, and this picture comprises man-machine interface, and the method comprises:
By this man-machine interface, receive switching command;
According to this switching command, optionally switch the first equipment and be main equipment or from equipment, and when this first equipment during for main equipment for this first equipment provides electric energy.
Preferably, in this man-machine interface, comprise button, this display device also comprises pilot lamp; According to this switching command, optionally switch the first equipment and be main equipment or from equipment, and when this first equipment during for main equipment this display device for this first equipment provides the step of electric energy, comprise:
When receiving the first switching command, control this pilot lamp in illuminating state, and to control this first equipment be this main equipment, this display device provides electric energy for this first equipment.
Compared with prior art, by built-in OTG function in display device, while making running gear as main equipment, can control easily desktop, and provide electric energy by display device for this action device, avoid the restriction of running gear electric energy.
Accompanying drawing explanation
The schematic diagram of a kind of display device that Fig. 1 provides for one embodiment of the invention;
The schematic diagram of the another kind of display device that Fig. 2 provides for one embodiment of the invention;
The structured flowchart that a kind of first interface that Fig. 3 provides for one embodiment of the invention, the second interface, the 3rd interface, the first data switching module are connected with the second data switching module;
Fig. 4 is a kind of physical circuit figure of structured flowchart as shown in Figure 3;
Fig. 5 is a kind of equivalent circuit diagram of the circuit diagram shown in Fig. 4;
Fig. 6 is the another kind of equivalent circuit diagram of the circuit diagram shown in Fig. 4;
The schematic flow sheet of the method for operating of a kind of display device that Fig. 7 provides for one embodiment of the invention.
Embodiment
For making that object of the present invention, structure, feature and function thereof are had to further understanding, hereby coordinate embodiment to be described in detail as follows.
As shown in Figure 1, disclosed the schematic diagram of a kind of display device that one embodiment of the invention provides, display device can be liquid crystal display.Display device 1 comprises: screen 11, first interface 12, data exchange unit 13 and processing unit 14.Wherein, screen 11 is for display frame, and this picture comprises man-machine interface.First interface 12 has the first power supply pin position, and first interface 12 is for connecting the first equipment.The switching command that processing unit 14 sends for interface man-machine interface, and controlling data exchange unit 13 and the first power supply pin position according to switching command, optionally to switch the first equipment be main equipment or from equipment, and when the first equipment, control the pin position that powers during for main equipment and provide electric energy for the first equipment.
Preferably, display device 1 also comprises field effect transistor.Processing unit 14 is for controlling data exchange unit 13 according to switching command and controlling this field effect transistor optionally to switch this first equipment be main equipment or from equipment by controlling this first power supply pin position, and by controlling this first pin position that powers, controls this field effect transistor and provide electric energy for this first equipment during for main equipment when this first equipment.This field effect transistor can be P-MOS (P type field effect transistor).
As shown in Figure 2, disclosed the schematic diagram of the another kind of display device that one embodiment of the invention provides, compared with above-mentioned Fig. 1, display device 1 also comprises: the second interface 15, there is the second power supply pin position, and the second interface 15 is for connecting the second equipment.Processing unit 14 provides electric energy for control the first power supply pin position and the second power supply pin position during for main equipment when the first equipment for the first equipment.If the second interface 15 connects the second equipment, it is that main equipment or the second equipment are main equipment that processing unit 14 optionally switches the first equipment for the pin position that powers according to switching command control data exchange unit 13 and first; Wherein, when the second equipment is main equipment, the first equipment be the second equipment from equipment.As shown in Figure 2, display device 1 also comprises: at least one the 3rd interface 16, the three interface 16 is for connecting the 3rd equipment.Wherein, when the 3rd equipment of at least one the 3rd interface 16 connection comprises keyboard and mouse, main equipment can be carried out corresponding operation according to the control information of keyboard and mouse transmission.For example,, when the first equipment is main equipment, if when the 3rd equipment that at least one the 3rd interface 16 connects comprises keyboard and mouse, user can utilize keyboard and mouse to this first operate.When the first equipment is main equipment, by at least one the 3rd interface in display device, connect keyboard and mouse, can be directly to the first operate by keyboard and mouse, the first equipment can see through wired (for example, HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface, HDMI), USB3.0 or display interface (Display port)) or wireless (for example miracast) transmit the screen 11 of picture by display device 1 and show, also can be so that the first equipment becomes desktop video-audio playing device or online multimedia.
When processing unit 14 receives the first switching command of man-machine interface transmission, it is main equipment that processing unit 14 control data exchange unit 13 and the first power supply pin position the second equipment is connected with the communication of display device 1 make the first equipment in closed condition; When processing unit 14 receives the second switching command that man-machine interfaces send, processing unit 14 is controlled data exchange unit 13 and the first power supply pin position and is set up display device 1 to be connected to make the second equipment with the communication of the second equipment be main equipment.
In man-machine interface, can comprise button, button is used for sending switching command, and button can utilize OSD to show to point out user to use or utilize Touch Screen analogue-key function.
Display device 1 can also comprise pilot lamp, and whether pilot lamp is used to indicate the current main equipment of display device is the first equipment, and the current main equipment of indicated number device is the first equipment or the second equipment.
Exemplary, when button sends the first switching command, processing unit 14 is controlled pilot lamp in illuminating state, and processing unit 14 is controlled data exchange unit 13 and the first power supply pin position and made the first equipment for main equipment and control the first power supply pin position to provide electric energy for the first equipment; When this button sends this second switching command, processing unit 14 is controlled pilot lamp in extinguishing state, and it is that the second equipment is main equipment from equipment that processing unit 14 control data exchange unit 13 and the first power supply pin position make the first equipment, now, the first equipment be the second equipment from equipment.
Preferably, can so that button acquiescence in opening, when button is during in opening, processing unit 14 is controlled data exchange unit 13 and the first power supply pin position, and to make the first equipment be main equipment.For example, when display device 1 is opened, processing unit 14 is controlled button in opening, now, if first interface 11 connects the first equipment, processing unit 14 is controlled data exchange unit 13 and the first power supply pin position, and to make the first equipment be main equipment, and display device 1 provides electric energy for the first equipment.Certainly, also can be so that button to be given tacit consent in stopping device, it is main equipment that processing unit 14 control data exchange unit 13 and the first power supply pin position make the second equipment.Certainly, can be also other situation, the embodiment of the present invention is not done concrete restriction to this.
Wherein, above-mentioned the first equipment can be used as for running gear etc. the equipment of the peripherals of computing machine after being connected with computing machine, and this equipment has processing unit; Wherein, running gear can be smart mobile phone, panel computer etc.Above-mentioned the second equipment can be computing machine.
Data exchange unit 13 can comprise: the first data switching module 131 and the second data switching module 132; The first data switching module 131 has the 3rd power supply pin position, and the first data switching module 131 is coupled to the second interface 15, first interface 12 and at least one the 3rd interface 16; The second data switching module 132 has the 4th power supply pin position, and the second data switching module 132 is coupled to second interface 15 and at least one the 3rd interface 16.Preferably, processing unit 14 receives after the switching command that man-machine interface sends, and it is main equipment or from equipment that the electromotive force of controlling the 3rd power supply pin position, the 4th power supply pin position and this first power supply pin position according to switching command optionally switches the first equipment.
Exemplary, provide a kind of display device to comprise: screen 11, first interface 12, processing unit 14, the second interface 15, at least one the 3rd interface 16, the first data switching module 131 and the second data switching module 132.As shown in Figure 3, disclosed the structured flowchart that a kind of first interface that one embodiment of the invention provides, the second interface, the 3rd interface, the first data switching module are connected with the second data switching module.Wherein, J1 is used for providing first interface 12, and J2 is used for providing the second interface 15, and U1 is used for providing at least one the 3rd interface 16, and Q1 is for controlling the OTG function of J1.
Preferably, first interface 12 has power supply pin position Scalar_GPIO6, the second interface 15 has power supply pin position Scalar_GPIO5, the first data switching module 131 has power supply pin position Scalar_GPIO1 and Scalar_GPIO2, and the second data switching module 132 has power supply pin position Scalar_GPIO3 and Scalar_GPIO4.As shown in Figure 4, disclosed a kind of physical circuit figure of structured flowchart as shown in Figure 3.Wherein, J1 is USB chip, and preferably J1 is category-B USB chip, and first interface 12 can be provided; When pin ID is wherein connected to ground connection (GND) by resistance, the first equipment being connected with first interface 12 can be main equipment; When pin ID is wherein unsettled, the first equipment being connected with first interface 12 is for from equipment.U1 is USB chip, at least one the 3rd interface 16 is provided.J2 is used for providing the second interface 15.Q1 is P-MOS switch, and one end connects the pin ID of J1, and the other end is by resistance eutral grounding (GND), and the electromotive force of adjustable the first power supply pin position of processing unit 14 makes Q1 open or close to regulate pin ID; Certainly, Q1 is except can be for P-MOS switch, can also be any just element of adjustable pin ID of electromotive force that processing unit 14 regulates the first power supply pin positions that makes.J1 is connected with the first data switching module 131 with the second data switching module 132, and J2 is connected with the first data switching module 131, and U1 is connected with the second data switching module 132 with the first data switching module 131.Table 1 is the explanation of the first data switching module 131 or the second data switching module 132.Conventionally OTG connected mode, needs the extra OTG of use special-thread, and the design can use the general common category-B USB chip with 5 pins just can realize OTG function, need not buy especially OTG special-thread again, can reduce use cost.
Table 1
Fig. 5 has disclosed when processing unit 14 receives the switching command that indication the first equipment that man-machine interface sends is main equipment, the equivalent circuit diagram of the circuit diagram shown in Fig. 4.When processing unit 14 receives the switching command that indication the first equipment that man-machine interface sends is main equipment, processing unit 14 is controlled power supply pin position, making Scalar_GPIO6 is high potential, Scalar_GPIO1 is high potential, Scalar_GPIO2 is low potential, Scalar_GPIO3 is high potential, and Scalar_GPIO4 is low potential.Because Scalar_GPIO6 is high potential, Q1 conducting; Because Scalar_GPIO1 is high potential, Scalar_GPIO2 is low potential, Scalar_GPIO3 is high potential, Scalar_GPIO4 is low potential, according to above-mentioned table 1, can obtain equivalent circuit diagram as shown in Figure 5, wherein, the second equipment is connected in closed condition with the communication of display device 1, and set up display device 1 and be connected with the communication of the first equipment, and then to make the first equipment be main equipment.
Fig. 6 has disclosed when processing unit 14 receives indication the first equipment that man-machine interface sends for switching command from equipment, the equivalent circuit diagram of the circuit diagram shown in Fig. 4.When processing unit 14 receives indication the first equipment that man-machine interface sends for switching command from equipment, processing unit 14 is controlled power supply pin position, making Scalar_GPIO6 is low potential, Scalar_GPIO1 is low potential, Scalar_GPIO2 is low potential, Scalar_GPIO3 is low potential, and Scalar_GPIO4 is low potential.Because Scalar_GPIO6 is low potential, not conducting of Q1; Because Scalar_GPIO1 is low potential, Scalar_GPIO2 is low potential, Scalar_GPIO3 is low potential, Scalar_GPIO4 is low potential, according to above-mentioned table 1, can obtain equivalent circuit diagram as shown in Figure 6, wherein, the first equipment is connected in closed condition with the communication of display device 1, and set up display device 1 and be connected with the communication of the second equipment, and then to make the second equipment be main equipment.
For avoiding electric current to recharge display device power-supply system, as shown in Fig. 4, Fig. 5 and Fig. 6, between the pin 1 of USB chip J1 and power supply, be connected a diode D, the positive pole of diode D is connected with one+5V power supply, the negative pole of diode D is connected with pin 1, and the pressure drop specification of this diode is less than 0.25V.
If do not there is at least one the 3rd interface 16, in above-mentioned Fig. 4, remove USB chip U1, the first data switching module 131 is directly connected with the second data switching module 132, concrete, make the pin D-and pin D-with D+ corresponding be connected of D+ with the second data switching module 132 of the first data switching module 131.
When the first equipment is main equipment, processing unit 14 is controlled the first power supply pin positions and the second power supply pin position and is provided electric energy for the first equipment.Concrete, when the first equipment is main equipment, the electromotive force that processing unit 14 is controlled the first power supply pin positions and the second power supply pin position provides electric energy for the first equipment, the circuit diagram providing corresponding to above-mentioned Fig. 4, processing unit 14 can be controlled the first power supply pin position Scalar_GPIO6 and the second power supply at least one power supply pin position in the Scalar_GPIO5 of pin position and provide electric energy for high potential makes display device 1 for the first equipment, also can control the first power supply pin position Scalar_GPIO6 and the second power supply pin position Scalar_GPIO5 all for low potential makes display device 1 not for the first equipment provides electric energy.
General OTG connected mode, if running gear is main equipment, power supply supply is to be offered from equipment end by running gear, but running gear uses battery supply finite capacity, if desired there is additional power supply source, need to increase USB Y profile and wire, by external transformer or supply unit, provide power supply.In the design, if running gear is main equipment, the power supply that can use display device is as the power supply source of running gear, need not USB Y profile and wire and the device such as transformer, can reduce use cost.When running gear is during as OTG main equipment, can provide and use power supply to charge to running gear by display device, reach the object of OTG and charging while start.
When computing machine is all connected the interface in display device with running gear, if now user wishes that computing machine can read running gear content, the design of changeable ID pin provided by the invention, running gear can be switched to from equipment end, make computing machine can read the content in running gear as main equipment.
More use running gear to connect device that the magnitude of current is larger as carry-on hard disc etc., due to running gear during as main equipment, the specification VBUS of pin 1 correspondence of J1 be push away 8mA more than, therefore may be not enough to promote carry-on hard disc, design of the present invention, when running gear is main equipment, display device can provide electric energy for running gear, and then running gear can utilize the power supply of display device to promote, and then can read information kit in carry-on hard disc by running gear.
The method of operating of a kind of display device that Fig. 7 provides for one embodiment of the invention, for display device, this display device comprises screen, and this screen is for display frame, and this picture comprises man-machine interface, and the method comprises:
S101, by man-machine interface, receive switching command.
S102, according to switching command, optionally switch the first equipment and be main equipment or from equipment, and when the first equipment during for main equipment for the first equipment provides electric energy.
Preferably, in man-machine interface, comprise button.
Further, display device also comprises: pilot lamp, pilot lamp is that main equipment is still from equipment for the first equipment.Preferably, when receiving the first switching command sending by button, control pilot lamp in illuminating state, and first equipment of control is main equipment, this display device provides electric energy for this first equipment; When receiving the second switching command sending by button, control pilot lamp in extinguishing state, and second equipment of control is main equipment.
Preferably, button acquiescence can be set in opening, and when button is during in opening, control the first equipment is main equipment.Further, display device can comprise pilot lamp, pilot lamp is that main equipment is still from equipment for the first equipment, when button is given tacit consent in opening, can be arranged so that pilot lamp is in illuminating state, when button switches to closed condition by opening, can be arranged so that pilot lamp is in extinguishing state.
The method of operating of display device provided by the invention, can optionally switch running gear by the man-machine interface on the screen of display device is main equipment or from equipment, and when running gear is main equipment, can control display device and provide electric energy for running gear, and then the limited problem of electric energy while having solved running gear as main equipment; Also can be so that after running gear collocation display device, running gear can be controlled the screen of display, for user provides service better.
The present invention is described by above-mentioned related embodiment, yet above-described embodiment is only for implementing example of the present invention.Must be pointed out that, the embodiment having disclosed does not limit the scope of the invention.On the contrary, the change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.

Claims (13)

1. a display device, is characterized in that, this display device comprises:
Screen, for display frame, this picture comprises man-machine interface;
First interface, has the first power supply pin position, and this first interface is used for connecting the first equipment;
Data exchange unit;
Processing unit, the switching command sending for receiving this man-machine interface, and controlling this data exchange unit and this first power supply pin position according to this switching command, optionally to switch this first equipment be main equipment or from equipment, and when this first equipment, control this first pin position that powers during for this main equipment and provide electric energy for this first equipment.
2. display device as claimed in claim 1, is characterized in that, this display device also comprises:
The second interface, has the second power supply pin position, and this second interface is used for connecting the second equipment;
This processing unit, provides electric energy for control this first power supply pin position and this second power supply pin position during for this main equipment when this first equipment for this first equipment.
3. display device as claimed in claim 1, is characterized in that, this display device also comprises:
At least one the 3rd interface, this at least one the 3rd interface is used for connecting at least one the 3rd equipment;
When this at least one the 3rd equipment that at least one the 3rd interface connects when this comprises keyboard and mouse, this main equipment is carried out corresponding operation according to the control information of this keyboard and the transmission of this mouse.
4. display device as claimed in claim 2, it is characterized in that, when this processing unit receives the first switching command that this man-machine interface sends, this processing unit is controlled this data exchange unit and this first, and to power that pin position this second equipment is connected with the communication of this display device makes this first equipment in closed condition be this main equipment; When this processing unit receives the second switching command that this man-machine interface sends, this processing unit is controlled this data exchange unit and this first pin position that powers and is set up this display device to be connected to make this second equipment with the communication of this second equipment be this main equipment.
5. display device as claimed in claim 1, it is characterized in that, this data exchange unit comprises the first data switching module and the second data switching module, and this first data switching module has the 3rd power supply pin position, and this second data switching module has the 4th power supply pin position; This processing unit, the switching command sending for receiving this man-machine interface, and optionally switch this first equipment for this main equipment or should be from equipment according to the electromotive force that this switching command is controlled the 3rd power supply pin position, the 4th power supply pin position and this first power supply pin position.
6. display device as claimed in claim 1, is characterized in that, in this man-machine interface, comprises button, and this button is used for sending this switching command.
7. display device as claimed in claim 6, is characterized in that, this display device also comprises pilot lamp, and whether this pilot lamp is used to indicate the current main equipment of this display device is this first equipment.
8. display device as claimed in claim 7, it is characterized in that, when this button sends this first switching command, this processing unit is controlled this pilot lamp in illuminating state, controlling this data exchange unit and this first power supply pin position, to make this first equipment be this main equipment, controls this first pin position that powers and provide electric energy for this first equipment; When this button sends this second switching command, this processing unit is controlled this pilot lamp in extinguishing state, controls this data exchange unit and makes this first equipment for being somebody's turn to do from equipment with this first power supply pin position.
9. display device as claimed in claim 6, is characterized in that, this button acquiescence is in opening, and when this button is during in this opening, this processing unit is controlled this data exchange unit and this first power supply pin position, and to make this first equipment be this main equipment.
10. display device as claimed in claim 2, is characterized in that, this first equipment is running gear, and this second equipment is computing machine.
11. display device as claimed in claim 1, is characterized in that, this display device also comprises field effect transistor; This processing unit is for controlling this data exchange unit according to this switching command and controlling this field effect transistor and optionally switch this first equipment for this main equipment or should be from equipment by controlling this first power supply pin position, and by controlling this first pin position that powers, controls this field effect transistor and provide electric energy for this first equipment during for this main equipment when this first equipment.
The method of operating of 12. 1 kinds of display device, for display device, is characterized in that, this display device comprises screen, and this screen is for display frame, and this picture comprises man-machine interface, and the method comprises:
By this man-machine interface, receive switching command;
According to this switching command, optionally switch the first equipment and be main equipment or from equipment, and when this first equipment during for this main equipment for this first equipment provides electric energy.
The method of operating of 13. display device as claimed in claim 12, is characterized in that, in this man-machine interface, comprises button, and this display device also comprises pilot lamp; According to this switching command, optionally switch the first equipment and be main equipment or from equipment, and when this first equipment during for this main equipment this display device for this first equipment provides the step of electric energy, comprise:
When receiving the first switching command, control this pilot lamp in illuminating state, and to control this first equipment be this main equipment, this display device provides electric energy for this first equipment.
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CN109032984A (en) * 2018-05-31 2018-12-18 广州吉欧电子科技有限公司 A kind of method and USB OTG equipment of multiplexing USB interface
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