CN103064518B - Video interface with power supply function and operation method thereof - Google Patents
Video interface with power supply function and operation method thereof Download PDFInfo
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- CN103064518B CN103064518B CN201210563718.2A CN201210563718A CN103064518B CN 103064518 B CN103064518 B CN 103064518B CN 201210563718 A CN201210563718 A CN 201210563718A CN 103064518 B CN103064518 B CN 103064518B
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Abstract
The invention provides a video interface with a power supply function and an operation method thereof. A control circuit comprises a first input end for receiving first control signals, a second input end for receiving second control signals, a first output end for outputting first power signals, a second output end for outputting second power signals and a video output joint which is provided with a first power supply pin and a second power supply pin. According to the video interface with the power supply function and the operation method thereof, when various computer hosts are connected with various external image display devices through the image output joints, power supply requirements of external image display devices can be provided simultaneously besides transmitting image signals, and the convenience for users is improved greatly.
Description
Technical field
The present invention, with regard to a kind of video interface technology, refers in particular to regard to a kind of video interface with function of supplying power and its behaviour
Make method.
Background technology
A large amount of development with the electronic installation product such as PC, notebook computer or panel computer and universalness, and
The external device (ED)s such as miscellaneous external or terminal or equipment also get more and more.However, traditionally needing using plurality of change
Depressor or power line providing power supply to give external device (ED) or equipment, so, have higher cost and lacking of additionally taking up room
Point.
Wherein, display device, such as CRT monitor, liquid crystal display or projector, its major function is to show
Show image it is however generally that, an image input adapter is provided with a side surface of display device, for example D-sub joint or
It is VGA joint, its main purpose is the image output joint (D-sub joint or VGA joint) with a main frame
Combine, to receive the signal of video signal that this signal source of supply is exported.
However, display device can itself have to be held through the power supply supply of extra transformer or power line
Row image shows, but the image output joint (including D-sub joint or VGA joint) of all of main frame does not have at present
There are function of supplying power, the therefore necessary external transformer of display device or power line, to supply the power supply of display device
Demand, its result will result in inconvenience on using for the user, and cost on manufacturing for the producer increases.
Therefore, how a kind of image output joint with function of supplying power and its control circuit of power supply output are proposed, real
Desired most ardently the emphasis overcoming to be located by related practitioner.
Content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of video with function of supplying power
Interface and its method of operating, for solve video interface of the prior art use on inconvenience and manufacturing cost high the problems such as.
For achieving the above object and other related purposes, the present invention provides a kind of video interface with function of supplying power, institute
State video interface to include：Control circuit, it comprises：First input end, it is in order to receive the first control signal；Second input,
It is in order to receive the second control signal；First output end, it is in order to export the first power supply signal；And second output end, its in order to
Output second source signal；And image output joint, it has the first power supply pin position and the second power supply pin position.
The present invention also provides a kind of method of operating of the video interface with function of supplying power, and described method of operating includes following
Step：Control circuit, its comprise first switch assembly, second switch assembly, the 3rd switch module, diode, first input end,
Second input, the first output end and the second output end；And image output joint, it has the first power supply pin position and the second confession
Electric pin position, wherein, the first end of this first switch assembly is coupled to this first input end, defeated in order to be received from this first input end
The first control signal entering, the second end of this first switch assembly is coupled to the second end of the 3rd switch module, and this first
3rd end of switch module is coupled to earth terminal；Wherein, the first end of this second switch assembly is coupled to this second input, uses
To be received from the second control signal of this second input input, the second end of this second switch assembly is coupled to system power supply,
And the 3rd end of this second switch assembly is coupled to this earth terminal；Wherein, the first end of the 3rd switch module be coupled to this
Second end of two switch modules, the second end of the 3rd switch module is coupled to this first output end, the 3rd switch module
3rd end is coupled to system power supply；And wherein, this diode, it is coupled to the first end of this second switch assembly second defeated with this
Go out between end.
As described above, video interface and its method for operating with function of supplying power of the present invention, in all kinds of main frames
Through its image output joint, when being connected with the display device of outside miscellaneous, in addition to transmission signal of video signal,
The power supply requirement of the display device of outside also can be provided simultaneously, greatly improve the convenience of user.
Brief description
Fig. 1 is the block diagram according to one of the present invention control circuit of example.
Fig. 2 is the circuit diagram according to one of the present invention control circuit of example.
Fig. 3 A is the flow chart according to one of the present invention method of operating of the control circuit of example.
Fig. 3 B is the flow chart according to one of the present invention another method of operating of the control circuit of example.
Fig. 4 is the schematic diagram of the video interface according to Fig. 2 control circuit with function of supplying power.
Reference numerals explanation
100：Control circuit
110：Input circuit
120：Input circuit
130：Controlled circuit
140：Output circuit
200：Control circuit
210：Input circuit
220：Input circuit
230：Controlled circuit
240：Output circuit
a1、b1、c1、d1：First end
a2、b2、c2、d2：Second end
c3：3rd end
C1：Electric capacity
D：Drain electrode
D1：Diode
FS1：Fuse switch
G：Grid
i1：Input
i2：Input
o1：Output end
o2：Output end
Q1、Q2、Q3：Transistor
R1、R2、R3、R4、R5：Resistance
S：Source electrode
P3V3_STBY：Cresset display device
VIN：System power supply
300：There is the video interface of function of supplying power
D15：VGAD-sub 15pin image output joint
pin4：The 4th pin position for D15
pin11：The 11st pin position for D15
Specific embodiment
Reference will now be made in detail the example that the present invention illustrates in alterations.It is possible to the greatest extent, will be according to phase in all schemas
With element numbers to represent same or similar part.
When and when reading with each alterations, you can be better understood upon the detailed description of the preferable example of the present invention.But should
Understand that the present invention is not limited to accurate be set with mode and the apparatus painted.Furthermore, it will be understood that to simple and clear in order to illustrate
Chu, the assembly being shown in schema is not necessarily to scale relative to each other.For example, in order to clearly show that in figure details, some assemblies
Size may amplify with respect to other assemblies.
Fig. 1 is the block diagram of the control circuit 100 according to the present invention one example.Control circuit 100 can comprise input circuit
110th, input circuit 120, controlled circuit 130 and output circuit 140, wherein controlled circuit 130 is respectively coupled to input circuit 110
And input circuit 120, to receive one first signal respectively from input circuit 110 and input circuit 120 and one second letter
Number, and judge whether to be sent to a power output signal output circuit 140 being coupled to controlled circuit 130.If output electricity
Road 140 receives this power output signal from controlled circuit 130, then output circuit 140 exports a rated voltage or electric current
To a load；Otherwise output circuit 140 does not export offer any voltage or electric current.
Next further illustrate the circuit implementation of control circuit 100, please refer to Fig. 1 and Fig. 2, Fig. 2 be according to
Circuit diagram according to the control circuit 200 of the present invention one example.Refer to Fig. 2, control circuit 200 can comprise controlled circuit 230, its
There is first end c1, the second end c2 and the 3rd end c3；Output circuit 240, it has first end d1, and in order to export one first electricity
Second end d2 of source signal；Input circuit 210, it has first end a1 receiving one first control signal, and the second end
a2；And input circuit 220, it has first end b1 receiving one second control signal, and in order to export one second electricity
The second end a2 of the second end b2 of source signal, wherein this input circuit 210 and the second end b2 of input circuit 220, is respectively coupled to
To first end c1 and the second end c2 of controlled circuit 230, the 3rd end c3 of controlled circuit 230 is coupled to the of output circuit 240
One end d1.
Wherein input circuit 210 comprises switch module Q1, and the first end of switch module Q1 is coupled to this input circuit 210
First end a1, and the 3rd end of switch module Q1 is coupled to an earth terminal；And resistance R1, it is coupled to switch module Q1's
Between second end and the second end a2 of input circuit 210, the resistance of resistance R1 can be in the present embodiment but be not limited to a kilooersted
Nurse (1K Ω).
Wherein input circuit 220 comprises resistance R2, and it is coupled to first end b1 of input circuit 220 and is shown with a cresset and sets
Between standby (P3V3_STBY), the resistance of resistance R2 can be in the present embodiment but be not limited to 1K Ω；3rd resistor R3, it couples
Between first end b1 of input circuit 220 and this earth terminal, the resistance of resistance R3 can be in the present embodiment but be not limited to 1M
Ω；Resistance R4, it is coupled between first end b1 of input circuit 220 and the second end b2 of input circuit 220, the resistance of resistance R4
Value can be in the present embodiment but be not limited to 33 Ω；And diode D1, this diode D1 anode tap (+) be coupled to input
Second end b2 of circuit 220, this diode D1 cathode terminal (-) be used for export this second source signal.
Wherein controlled circuit 230 comprises switch module Q2, and the first end of switch module Q2 is coupled to the of controlled circuit 230
Two end c2, and the 3rd end of switch module Q2 is coupled to an earth terminal；Resistance R5, it is coupled to second end of switch module Q2
And system power supply VIN between, the resistance of resistance R5 can be in the present embodiment but be not limited to 10K Ω；And switch module Q3,
The first end of switch module Q3 is coupled to second end of switch module Q2, and second end of switch module Q3 is coupled to controlled circuit
230 first end and the 3rd end c3, and the 3rd end of switch module Q3 is coupled to this system power supply VIN.
Wherein output circuit 240 comprises electric capacity C1, and it is coupled between first end d1 of output circuit 240 and earth terminal,
The capacitance of electric capacity C1 can be in the present embodiment but be not limited to 1 μ F；And fuse switch FS1, it is coupled to output circuit
Between 240 first end b1 and the second end b2.
Above-mentioned switch module Q1, Q2 and Q3 can for but be not limited to NMOS field-effect transistor, PMOS field-effect transistor,
Bipolar transistor or other.And when above-mentioned switch module uses NMOS or PMOS, the first of above-mentioned switch module
End, the second end and the 3rd end correspond to grid, drain electrode and the source electrode of NMOS or PMOS respectively.
Fig. 3 A and 3B is the flow chart of the method for operating of control circuit according to the present invention one example.Referring to Fig. 2
With Fig. 3 A, in step 301, the input i1 of input circuit 210 receives one first control signal；In step 302, work as input
End i1 receives this first control signal, judges this first control signal for high levle or low level, if high levle, in step
In rapid 303, turn on switch module Q1, then no matter whether the 3rd switch module Q3 turns on, in step 308, output circuit 240
The no any power supply signal output of output end o1, then terminate whole control flow；If the first control signal is low level,
In step 304, switch module Q1 is ended, then in step 305, the input i2 of input circuit 220 receives one second control
When signal processed is low level, within step 306, output end o2 of input circuit 220 is because of low level, therefore non-transformer signal output,
In step 307, also because of low level, and end switch module Q2, then switch module Q3 is also switched off, in step 308, output electricity
The no any power supply signal output of output end o1 on road 240, then terminate whole control flow.
Next, referring to Fig. 2 and Fig. 3 B, in step 401, the input i1 of input circuit 210 receives one first
When control signal is low level, then in step 402, switch module Q1 is ended, then in step 403, input circuit 220
Input i2 receive one second control signal be high levle when, in step 404 because the first end of switch module Q2 be height
Level, therefore output end o2 exports a second source signal, then in step 405, also because this second control signal is Gao Zhun
Position, then switch module Q2 conducting, then switch module Q3 is also switched on, therefore in a step 406, this output end o1 output one first electricity
Source signal, setting finishes, then terminate whole control flow.
Next further illustrate application on video interface for the control circuit 200, please refer to Fig. 2 and Fig. 4, Fig. 4
It is the schematic diagram of the video interface 300 according to Fig. 2 control circuit 200 with function of supplying power.Refer to Fig. 4, have and supply electric work
The video interface 300 of energy can comprise control circuit 200, and it comprises：Input i1, it is in order to receive one first control signal；Defeated
Enter to hold i2, it is in order to receive one second control signal；Output end o1, it is in order to export one first power supply signal；And output end o2,
It is in order to export a second source signal；And image output joint D15, it has power supply pin position pin4, and power supply pin position
Pin11, wherein output end o1 and output end o2, can be respectively coupled to power supply pin position pin4 and the power supply of image output joint D15
Pin position pin11, also can be respectively coupled to the power supply pin position pin11 and power supply pin position pin4 of image output joint D15, in other words
Say, output end o1 and output end o2 with this etc. the pin position that powers couple relation, application can exchange.
Wherein input i1 is coupled to a basic input/output, to receive this first control signal, and this is basic
Input/output can be but be not limited to BIOS (Basic Input/Output System), the Yong Hushe of a main frame
Stationary interface, the firmware interface (Firmware Interface) of extended function card (adapter), power-on management program（boot
loader）Or other.
Wherein input i2 is coupled to a universal input/output system, to receive this second control signal, and this is general
Input/output (General Purpose Input/Output) can be but be not limited to an embedded controller
(Embedded Controller), Application Software Program (Software), user's I/O interface or other.
Wherein output end o1 alternative is coupled to power supply pin position pin4 or pin11 of image output joint D15, and defeated
Also alternative is coupled to power supply pin position pin4 or pin11 of image output joint D15 to go out to hold o2, what is more, output end o1 and
Output end o2 alternative is coupled to arbitrary pin position of image output joint D15.
Wherein this image output joint D15 can for but be not limited to a VGA D-sub 15pin joint or other, power pin position
Pin4 can be No. 4 pin position of this VGA D-sub 15pin joint, and the pin position pin11 that powers can be this VGA D-sub 15pin
The o.11 pin position of joint, but in fact, power supply pin position pin4 and power supply pin position pin11 is in this VGA D-sub 15pin joint
This grade pin position being used, can exchange in application, also can be using other any pin on this VGA D-sub 15pin joint
Position.
Wherein control circuit 200 more can comprise a switch module Q1, a switch module Q2, a switch module Q3 and one or two poles
Pipe D1；The first end of wherein switch module Q1 is coupled to this input i1, in order to be received from this first control of input i1 input
Signal processed, second end of switch module Q1 is coupled to second end of switch module Q3, and the 3rd end of switch module Q1 is coupled to
One earth terminal；The first end of wherein switch module Q2 is coupled to input i2, in order to be received from input i2 input this second
Control signal, second end of switch module Q2 is coupled to system power supply VIN, and the 3rd end of switch module Q2 is coupled to this and connects
Ground terminal；The first end of wherein switch module Q3 is coupled to second end of switch module Q2, and second end of switch module Q3 is coupled to
Output end o1, the 3rd end of switch module Q3 is coupled to system power supply VIN；And diode D1, it is coupled to switch module Q2
First end and output end o2 between.
Wherein when input i1 receives this first control signal, if high levle, switch module Q1 turns on, then no
Whether turn on by switch module Q3, all no any power supply signal output of output end o1.
Wherein when input i1 receives this first control signal, if low level, then switch module Q1 cut-off.
Wherein when switch module Q1 ends, and when input i2 receives this second control signal, if low level, then
The first end of switch module Q2 is low level, therefore the no any power supply signal output of output end o2, and switch module Q2 cut-off, then open
Close assembly Q3 to be also switched off, therefore the no any power supply signal output of output end o1.
Wherein when switch module Q1 ends, and when input i2 receives this second control signal, if high levle, then
The first end of Q2 switch module is high levle, therefore output end o2 exports this second source signal, and switch module Q2 conducting, then open
Close assembly Q3 to be also switched on, therefore output end o1 exports this first power supply signal.
Above-mentioned switch module Q1, Q2 and Q3 can be brilliant for NMOS field-effect transistor, PMOS field-effect transistor, Bipolar
Body pipe or other.And when above-mentioned switch module uses NMOS or PMOS, the above-mentioned first end of switch module, the second end and
3rd end corresponds to grid, drain electrode and the source electrode of NMOS or PMOS respectively.
Video interface and its method for operating with function of supplying power of the present invention, passes through its image in all kinds of main frames
Out splice going splice, when being connected with the display device of outside miscellaneous, in addition to transmission signal of video signal, also can be carried simultaneously
For the power supply requirement of outside display device, greatly improve the convenience of user.
When illustrating the representative example of the present invention, this specification may be by the method for operating of the present invention and/or process
The step being rendered as a particular sequence.However, because the method or process are not rely on the particular order of this step herein, because
And the method or process are not intended to be limited to the particular sequence of this step.Usual skill in technique should be understood that also may be used
Step using other sequences.Therefore, the particular order of this step of this specification is not construed as the limit to claim
System.Additionally, the claim with regard to the method for the present invention and/or process is not intended to be limited to sequentially to execute it with this and respectively walks
Suddenly, and those skilled in the art can be readily understood upon, the sequence such as this can be varied from and still fall within spirit and scope of the present invention
Interior.
Those skilled in the art should be understood that under conditions of the extensive inventive concept without departing substantially from examples detailed above, can be to this etc.
Example makes change.It will be understood, therefore, that the present invention is not limited only to disclosed instantiation, but be intended to belong to
All modifications in spirit and scope of the present invention defined in attached claims.
Claims (7)
1. a kind of video interface with function of supplying power is it is characterised in that described video interface is applied in main frame, its
Including：
Control circuit, it comprises：
First input end, it is in order to receive the first control signal；
Second input, it is in order to receive the second control signal；
First output end, it is in order to export the first power supply signal；And
Second output end, it is in order to export second source signal；And
Image output joint, it has the first power supply pin position and the second power supply pin position；
Wherein, this first input end is coupled to basic input/output；This basic input/output is main frame
BIOS or extended function card firmware interface；This second input is coupled to universal input/output system；This universal input/
Output system is embedded controller, Application Software Program or user's I/O interface；
Wherein, this first output end is coupled to this first power supply pin position of this image output joint, and this second output end is coupled to
This second power supply pin position of this image output joint；Or this first output end is coupled to this second confession of this image output joint
Electric pin position, this second output end is coupled to this first power supply pin position of this image output joint.
2. the video interface with function of supplying power according to claim 1 it is characterised in that：This image output joint is D-
Sub joint, this first power supply pin position is No. 4 pin position of this D-sub joint, and this second power supply pin position is this D-sub joint
O.11 pin position；Or, this first power supply pin position is the o.11 pin position of this D-sub joint, and this second power supply pin position is
No. 4 pin position of this D-sub joint；Or, this first power supply pin position and the second power supply pin position are respectively appointing of this D-sub joint
Two pin positions of meaning.
3. a kind of method of operating of the video interface with function of supplying power is it is characterised in that described method of operating includes following step
Suddenly：
Connect control circuit, it comprises first switch assembly, second switch assembly, the 3rd switch module, diode, the first input
End, the second input, the first output end and the second output end；And
Connect image output joint, it has the first power supply pin position and the second power supply pin position,
Wherein, this first input end is coupled to basic input/output, to receive the first control signal；This second input
End is coupled to universal input/output system, to receive the second control signal；This first output end is coupled to this first power supply pin
Position and this second output end are coupled to this second power supply pin position；Or, this first output end be coupled to this second power supply pin position and
This second output end is coupled to this first power supply pin position；
Wherein, the first end of this first switch assembly is coupled to this first input end, in order to be received from the input of this first input end
The first control signal, the second end of this first switch assembly is coupled to the second end of the 3rd switch module, and this first is opened
The 3rd end closing assembly is coupled to earth terminal；
Wherein, the first end of this second switch assembly is coupled to this second input, in order to be received from the input of this second input
The second control signal, the second end of this second switch assembly is coupled to system power supply, and the 3rd end of this second switch assembly
It is coupled to this earth terminal；
Wherein, the first end of the 3rd switch module is coupled to the second end of this second switch assembly, the 3rd switch module
Second end is coupled to this first output end, and the 3rd end of the 3rd switch module is coupled to system power supply；And
Wherein, this diode, is coupled between the first end of this second switch assembly and this second output end.
4. the video interface with function of supplying power according to claim 3 method of operating it is characterised in that：This first control
Signal processed is low level, and when this second control signal is high levle, then this first switch assembly cut-off, this second switch assembly
First end be high levle, therefore this second output end output second source signal.
5. the video interface with function of supplying power according to claim 3 method of operating it is characterised in that：This first control
Signal processed is low level, and when this second control signal is high levle, then this first switch assembly cut-off, this second switch assembly
Conducting, the 3rd switch module is also switched on, and this first output end exports the first power supply signal.
6. the video interface with function of supplying power according to claim 3 method of operating it is characterised in that：This first is opened
Close assembly and this second switch assembly and be NMOS field-effect transistor, this first switch assembly and this second switch assembly its each
First end, the second end and the 3rd end be respectively to should the grid of NMOS field-effect transistor, drain electrode and source electrode.
7. the video interface with function of supplying power according to claim 3 method of operating it is characterised in that：3rd opens
Pass assembly is PMOS field-effect transistor, and the first end of the 3rd switch module, the second end and the 3rd end are respectively to should PMOS field
The grid of effect transistor, drain electrode and source electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563718.2A CN103064518B (en) | 2012-12-21 | 2012-12-21 | Video interface with power supply function and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563718.2A CN103064518B (en) | 2012-12-21 | 2012-12-21 | Video interface with power supply function and operation method thereof |
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| CN103064518A CN103064518A (en) | 2013-04-24 |
| CN103064518B true CN103064518B (en) | 2017-02-08 |
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| CN201210563718.2A Active CN103064518B (en) | 2012-12-21 | 2012-12-21 | Video interface with power supply function and operation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104635907A (en) * | 2013-11-14 | 2015-05-20 | 鸿富锦精密工业(武汉)有限公司 | Energy-saving circuit of computer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201270019Y (en) * | 2008-10-15 | 2009-07-08 | 星安科技股份有限公司 | Control circuit capable of saving electricity of standby electric power of peripheral devices |
| TW201023157A (en) * | 2008-12-12 | 2010-06-16 | Innolux Display Corp | Liquid crystal display device connecting external image signal source |
| CN102034445A (en) * | 2009-09-28 | 2011-04-27 | 群康科技(深圳)有限公司 | Power supply circuit of liquid crystal display |
| CN102255478A (en) * | 2010-05-20 | 2011-11-23 | 台达电子工业股份有限公司 | Electronic system and electronic equipment thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI443500B (en) * | 2008-06-30 | 2014-07-01 | Asustek Comp Inc | Power supply system, computer thereof and power supplying method of computer |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201270019Y (en) * | 2008-10-15 | 2009-07-08 | 星安科技股份有限公司 | Control circuit capable of saving electricity of standby electric power of peripheral devices |
| TW201023157A (en) * | 2008-12-12 | 2010-06-16 | Innolux Display Corp | Liquid crystal display device connecting external image signal source |
| CN102034445A (en) * | 2009-09-28 | 2011-04-27 | 群康科技(深圳)有限公司 | Power supply circuit of liquid crystal display |
| CN102255478A (en) * | 2010-05-20 | 2011-11-23 | 台达电子工业股份有限公司 | Electronic system and electronic equipment thereof |
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