CN108205512A - High-definition multimedia interface device and its control method - Google Patents
High-definition multimedia interface device and its control method Download PDFInfo
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- CN108205512A CN108205512A CN201611168552.9A CN201611168552A CN108205512A CN 108205512 A CN108205512 A CN 108205512A CN 201611168552 A CN201611168552 A CN 201611168552A CN 108205512 A CN108205512 A CN 108205512A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
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- G06F13/4068—Electrical coupling
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
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Abstract
The present invention proposes a kind of high-definition multimedia interface device and its control method.High-definition multimedia interface device includes high-definition multimedia interface connectivity port, control circuit, governor circuit, slave circuit and switching circuit.Governor circuit and slave circuit generating master control HDMI output signals and subordinate HDMI output signals respectively.Switching circuit is coupled to HDMI connectivity ports and control circuit.The control signal-selectivity that switching circuit is generated according to control circuit is connected in the first conducting state and the second conducting state；When switching circuit conducting is in the first conducting state, switching circuit is electrically connected governor circuit, and master control HDMI output signals is made to be exported via high-definition multimedia interface connectivity port；When switching circuit conducting is in the second conducting state, switching circuit is electrically connected slave circuit, and subordinate HDMI output signals is made to be exported via HDMI connectivity ports.
Description
Technical field
The present invention relates to a kind of electronic devices, particularly support the electronic device of high-definition multimedia interface tech.
Background technology
In recent years, with high-definition multimedia interface（High Definition Multimedia Interface；
HDMI）Technology is increasingly popularized, and most electronic devices, which has, carries HDMI connectivity ports, for example, as news source device
Game machine, DVD, personal computer and laptop or, as news source playing device television set, projector and meter
Calculation machine display.Only need a HDMI transmission line that can will include message and video signal between news source device and news source playing device
HDMI signals from interrogate source device export to news source playing device.For example, personal computer can prolong display picture and message
It stretches output to television set and carries out audio-visual broadcasting.
However, in well known HDMI technologies, news source device is not supported usually to play other news source device outputs
The function in news source, and the source playing device of news does not support the function of exporting news source, if supporting output news source and reception simultaneously
News source plays out difunctional, and a HDMI connectivity port certainly will be further added by electronic device, wherein a HDMI connectivity ports
For receiving the HDMI signals from other news source devices, and another HDMI connectivity ports are used for exporting news source to other news sources
Playing device, the PORT COM quantity that so just causing electronic device need to accommodate increase, and the volume of electronic device is caused to rise.If
To avoid increasing the quantity of PORT COM, then the quantity of other PORT COMs such as usb connecting port certainly will be sacrificed.Furthermore volume
The outer production cost that product is also resulted in using a HDMI connectivity port is risen.Further, if electronic device connects comprising two HDMI
Port is connect, user must also rely on the mark by HDMI connectivity ports that can just pick out which one in two HDMI connectivity ports is
Source output terminal mouth is interrogated, and which one is news source receiving port, if identification mistake, HDMI transmission lines are connected to the connecting pin of mistake
Mouth then causes news source playing device that can not normally play news source, so causes the inconvenience of user.
Invention content
In view of this, the present invention proposes a kind of high-definition multimedia interface device and its control method.
Then, the present invention provides a kind of high-definition multimedia interface device, comprising high-definition multimedia interface connectivity port,
Control circuit, governor circuit, slave circuit and switching circuit.Control circuit is generating a control signal；Governor circuit to
Generate a master control high-definition multimedia interface output signal；Slave circuit exports to generate a subordinate high-definition multimedia interface
Signal；Switching circuit is coupled to high-definition multimedia interface connectivity port and control circuit, and switching circuit is to according to control letter
Number selectivity conducting in one first conducting state and one second conducting state；When switching circuit is connected in the first conducting state,
Switching circuit is electrically connected at governor circuit, makes master control high-definition multimedia interface output signal via high-definition multimedia interface
Connectivity port exports；When switching circuit is connected in the second conducting state, switching circuit is electrically connected at slave circuit, makes subordinate
High-definition multimedia interface output signal is exported via high-definition multimedia interface connectivity port.
In some embodiments, the governor circuit is more believed to receive subordinate high-definition multimedia interface input
Number, slave circuit is more receiving a master control high-definition multimedia interface input signal；When switching circuit conducting is in the first conducting
During state, governor circuit receives subordinate high-definition multimedia interface input signal via high-definition multimedia interface connectivity port；
When switching circuit conducting is in the second conducting state, slave circuit receives master control high solution via high-definition multimedia interface connectivity port
Analyse multimedia interface input signal.
In some embodiments, the master control high-definition multimedia interface output signal includes one and minimizes transmission differential
Signal output signal and a power output signal, master control high-definition multimedia interface input signal include one and minimize transmission differential
Signal input signal and a power supply input signal, subordinate high-definition multimedia interface input signal include an extension display identification letter
It ceases input signal and a heat inserts detecting input signal, subordinate high-definition multimedia interface output signal includes an extension display identification
Output information signal and a heat insert detecting output signal.
In some embodiments, control circuit coupling high-definition multimedia interface connectivity port, and switching circuit
It is connected after the first conducting state according to a logic level of control signal, if control circuit is via high-definition multimedia interface
Connectivity port receive power supply input signal, control circuit generate with another logic level control signal, make switching circuit by
First conducting state switches to the second conducting state.
In some embodiments, control circuit coupling slave circuit, and switching circuit is according to the one of control signal
Logic level is connected after the first conducting state, if control circuit receives extension via slave circuit shows that identification information exports
Signal, control circuit generate the control signal with another logic level, and switching circuit is made to switch to the by the first conducting state
Two conducting states.
In some embodiments, the governor circuit is coupled to control circuit, and governor circuit and control circuit are distinguished
For platform courses maincenter device and embedded controller, governor circuit receives a booting power supply and embedded controller is driven to generate control
Signal processed makes switching circuit conducting in the first conducting state.
In some embodiments, the control circuit be embedded controller, control circuit receive a standby power with
Supply the running of slave circuit and switching circuit.
In some embodiments, the high-definition multimedia interface device further includes a housing, to accommodating high parsing
Multimedia interface connectivity port, control circuit, governor circuit, slave circuit and switching circuit, and an entity is formed on housing
Button, to receive a touching to generate a touching signal, control circuit generates corresponding control signal according to touching signal.
In some embodiments, the high-definition multimedia interface device further includes a display unit and is placed in the shell
In body, the video signal adjustment functional menu shown by display unit further includes a setting option of the conducting state of switching circuit,
Physical button receives the touching to change setting option, and control circuit is made to generate corresponding control signal.
In some embodiments, a kind of control method of high-definition multimedia interface device is included produces via a governor circuit
A raw master control high-definition multimedia interface output signal is electrically connected governor circuit and the high more matchmakers of parsing via a switching circuit
Body interface connectivity port makes master control high-definition multimedia interface output signal defeated via high-definition multimedia interface connectivity port
Go out, via a slave circuit generate a subordinate high-definition multimedia interface output signal and via switching circuit be electrically connected from
Belong to circuit and high-definition multimedia interface connectivity port, subordinate high-definition multimedia interface output signal is made to parse more matchmakers via height
Body interface connectivity port exports.
In some embodiments, the control method of the multimedia interface device is further included via high-definition multimedia circle
Face connectivity port receives a subordinate high-definition multimedia interface input signal, is electrically connected governor circuit and height via switching circuit
Definition multimedia interface connectivity port makes governor circuit more via the reception subordinate height parsing of high-definition multimedia interface connectivity port
Media interface input signal receives input letter in a master control high-definition multimedia interface via high-definition multimedia interface connectivity port
Number and be electrically connected slave circuit and high-definition multimedia interface connectivity port via switching circuit, make slave circuit via height
Definition multimedia interface connectivity port receives master control high-definition multimedia interface input signal.
Beneficial effects of the present invention are high-definition multimedia interface device of the invention and its control method, and height parsing is more
One HDMI connectivity ports of media interface device may connect to master controlling terminal device and subordinate end device.Thus, high parsing is more
Media interface device can be used as main control end and subordinate end, and compared to prior art, the quantity of HDMI connectivity ports is not required to increase, into
And save the production cost of high-definition multimedia interface device.Also, user is also without visually to recognize HDMI connecting pins
Mouth is input port or output port, so just improves ease of use.
【Description of the drawings】
Fig. 1 is the block schematic diagram according to an embodiment of the high-definition multimedia interface device of the present invention.
Fig. 2 is connected to a block schematic diagram of a subordinate end device 2 for the high-definition multimedia interface device 1 in Fig. 1.
Fig. 3 is connected to a side of an embodiment of a master controlling terminal device 3 for the high-definition multimedia interface device 1 in Fig. 1
Block schematic diagram.
Fig. 4 is connected to the one of another embodiment of a master controlling terminal device 3 for the high-definition multimedia interface device 1 in Fig. 1
Block schematic diagram.
Fig. 5 is the appearance diagram according to an embodiment of the high-definition multimedia interface device of the present invention.
Fig. 6 is the appearance diagram of an embodiment being connected to each other according to the high-definition multimedia interface device of the present invention.
【Specific embodiment】
Fig. 1 is the block schematic diagram according to the high-definition multimedia interface device of the present invention.Fig. 1 is please referred to, height parsing is more
Media interface device 1 includes high-definition multimedia interface connectivity port 11, control circuit 12, governor circuit 13, slave circuit 14
And switching circuit 15.Switching circuit 15 couples high-definition multimedia interface connectivity port 11 and control circuit 12, and switching circuit
15 selectively couple governor circuit 13 and slave circuit 14.In some embodiments, switching circuit 15 can be electronic switch,
For example, switching circuit 15 can be with multiple metal oxide semiconductcor field effect transistors（MOSFET）To realize.
High-definition multimedia interface device 1 can carry out HDMI between other electronic devices with HDMI connectivity ports and lead to
News, governor circuit 13 input to generate master control HDMI output signals S1 and receive the subordinate HDMI from the electronic device
Signal S2.Slave circuit 14 to generate subordinate HDMI output signals S3 and receive the master control HDMI from the electronic device
Input signal S4.Furthermore as shown in Figure 1, switching circuit 15 is controlled by control circuit 12, control circuit 12 is believed to generate control
Number S5, switching circuit 15 receive the control signal S5 that control circuit 12 generates, and switching circuit 15 is according to the logic of control signal S5
Level and can be switched in the first conducting state and the second conducting state.For example, high logic level（That is, logical one）Control
Signal S5 processed can cause switching circuit 15 to be connected in the first conducting state, and low logic level（That is, logical zero）Control signal
S5 can cause switching circuit 15 to be connected in the second conducting state.By taking the switching circuit 15 includes multiple MOSFET as an example, often
The gate of one MOSFET（gate）End is coupled to control circuit 12 to receive control signal S5.
Then, according to two conducting states of switching circuit 15, switching circuit 15 be optionally coupled to governor circuit 13 and
Slave circuit 14.When switching circuit 15 is connected in the first conducting state, switching circuit 15 is electrically connected at governor circuit 13, this
When high-definition multimedia interface device 1 can be used as master control（master）End, the master control HDMI output letters for generating governor circuit 13
Number S1 is exported via high-definition multimedia interface connectivity port 11, and governor circuit 13 is made to be connected via high-definition multimedia interface
Port 11 receives subordinate HDMI input signals S2.On the other hand, when switching circuit 15 is connected in the second conducting state, switch electricity
Road 15 is electrically connected at slave circuit 14, and high-definition multimedia interface device 1 can be used as subordinate at this time（slave）End, makes subordinate
The subordinate HDMI output signals S3 that circuit 14 generates is exported, and make slave circuit via high-definition multimedia interface connectivity port 11
14 receive master control HDMI input signals S4 via high-definition multimedia interface connectivity port 11.
Fig. 2 to Fig. 4 is respectively the high-definition multimedia interface device 1 of Fig. 1 as main control end and an embodiment at subordinate end
Block schematic diagram.Referring to Fig. 2 to Fig. 4, what deserves to be explained is, high-definition multimedia interface connectivity port 11 has most
Smallization transmission differential signal（Transition Minimized Differential Signaling；TMDS）Channel, display money
Expect channel（Display Data Channel；DDC）Channel,（Consumer Electronics Control；CEC）Channel,
Power supply（Power）Circuit and heat insert detecting（Hot Plug Detection；HPD）Circuit, high-definition multimedia interface connecting pin
Mouth 11 is compatible in any existing HDMI connectors, for example, the A types of 19 piece-root grafting feet of tool（type）HDMI connectors, 29 piece-root grafting feet of tool
Type B HDMI connectors, have 19 piece-root grafting feet c-type HDMI connectors and have 19 piece-root grafting feet D type HDMI connectors.High-definition multimedia
One end of any type of HDMI transmission lines can be connected to HDMI connectivity ports 11, and will be another by the user of interface device 1
End is connected to subordinate end device 2 or master controlling terminal device 3, with the audiovisual materials of transmission tool HDMI forms.
Base this, as shown in Fig. 2, governor circuit 13 can be generated comprising TMDS output signals S11's and power output signal S12
Master control HDMI output signals S1, TMDS output signal S11 and power output signal S12 can be respectively via high-definition multimedia interfaces
TMDS channels and the power circuit output of connectivity port 11.Governor circuit 13 can receive packet respectively via DDC channels and HPD circuits
Identification information is shown containing extension（Extended display identification data；EDID）Input signal S21 and HPD
The subordinate HDMI input signals S2 of input signal S22.Also, believe as shown in figure 3, slave circuit 14 can generate to export comprising EDID
Subordinate HDMI output signals S3, the EDID output signal S31 and HPD output signal S32 of number S31 and HPD output signals S32 can divide
Not via DDC channels and HPD circuit outputs.Slave circuit 14 can be received via TMDS channels and power circuit comprising TMDS respectively
The master control HDMI input signals S4 of input signal S41 and power supply input signal S42.
For using high-definition multimedia interface device 1 as main control end, as shown in Fig. 2, high-definition multimedia interface device 1
It is connected to a subordinate end device 2.Subordinate end device 2 may include high-definition multimedia interface connectivity port 21, HDMI control units
22 and read-only memory 23.When the both ends of HDMI transmission lines are connected to high-definition multimedia interface connectivity port 11 and high solution
After analysing multimedia interface connectivity port 21, since switching circuit 15 is connected in the first conducting state, high-definition multimedia interface
Each channel and each circuit of connectivity port 11 are electrically connected at governor circuit 13 via switching circuit 15.Then, governor circuit 13
The power output signal S12 of generation can be via switching circuit 15, high-definition multimedia interface connectivity port 11 and the high more matchmakers of parsing
Body interface connectivity port 21 is sent to subordinate end device 2, makes the HDMI control units 22 of subordinate end device 2 and stores EDID
Read-only memory 23 export HPD input signal S22 and EDID the input signal S21 for having high logic level respectively, to respond electricity
Source output signal S12.Then, governor circuit 13 is received via high-definition multimedia interface connectivity port 11 and switching circuit 15
EDID input signal S21 and HPD input signals S22.Governor circuit 13 can according to the HPD input signals S22 for having high logic level
Learn that high-definition multimedia interface connectivity port 11 has been connected to subordinate end device 2.Also, governor circuit 13 is inputted according to EDID
Signal S21 transmissions are compatible with the TMDS output signals S11 of the display unit of subordinate end device 2.Finally, TMDS output signals S11
Via switching circuit 15, high-definition multimedia interface connectivity port 11 and high-definition multimedia interface connectivity port 21 be sent to from
Belong to end device 2, subordinate end device 2 is enable to play video signal and message respectively.
For using high-definition multimedia interface device 1 as subordinate end, as shown in figure 3, high-definition multimedia interface device 1
It is connected to the master controlling terminal device 3 for including high-definition multimedia interface connectivity port 31.Master controlling terminal device 3 includes high-definition multimedia
Interface connectivity port 31.When the both ends of HDMI transmission lines are connected to high-definition multimedia interface connectivity port 11 and high parsing
After multimedia interface connectivity port 31, since switching circuit 15 is connected in the second conducting state, high-definition multimedia interface connects
Each channel and each circuit for connecing port 11 are electrically connected at slave circuit 14 via switching circuit 15.Then, master controlling terminal device 3 can
It is more via height parsing via high-definition multimedia interface connectivity port 31 out-put supply input signal S42, power supply input signal S42
Media interface connectivity port 11 and switching circuit 15 are sent to slave circuit 14, and slave circuit 14 is made to export EDID output letters respectively
The HPD output signal S32 of number S31 and the high logic level of tool, to respond power supply input signal S42.Then, EDID output signals
S31 and HPD output signals S32 is via switching circuit 15, high-definition multimedia interface connectivity port 11 and high-definition multimedia circle
Face connectivity port 31 is sent to master controlling terminal device 3, and master controlling terminal device 3 is made to learn that high-definition multimedia interface connectivity port 31 has connected
It is connected to high-definition multimedia interface device 1.Then, master controlling terminal device 3 is compatible with high parsing according to EDID output signals S31 outputs
TMDS input signals S41, the TMDS input signal S41 of the display unit 16 of multimedia interface device 1 connects via multimedia interface
It connects port 31, multimedia interface connectivity port 11 and switching circuit 15 and is sent to slave circuit 14.Finally, slave circuit 14 is right
TMDS input signals S41 carries out signal processing so that video signal and message are respectively sent to display unit 16 and message broadcast unit
17。
In some embodiments, high-definition multimedia interface device 1 can be integrally formed（all in one；AIO）It calculates
Machine.As shown in figure 5, high-definition multimedia interface device 1 more may include a housing 18, housing 18 can house high-definition multimedia circle
Face connectivity port 11, control circuit 12, governor circuit 13, slave circuit 14 and switching circuit 15.In this, governor circuit 13 can be with
The platform courses maincenter device of integrated molding computer（Platform controller hub, PCH）It realizes, to export video signal
And the TMDS output signals S11 after message integration.Slave circuit 14 can be with import and export chip（I/O chip）It is electrically connected read-only
Memory, decoder and HPD controllers are realized.Wherein, decoder can support Low Voltage Differential Signal（Low Voltage
Differential Signaling；LVDS）Transmission, decoder is to TMDS input signals S41 into row decoding and by video signal and sound
News separation；EDID is stored in read-only memory and exportable EDID output signals S31；And HPD controllers can be in receiving voltage
Output has the HPD output signals S32 of high logic level after the power supply input signal S42 that level is 5 V.Control circuit 12 can be interior
Embedded controller（Embedded Controller）Or any special application integrated circuit with control function（ASIC）.
Base this, high-definition multimedia interface device 1 for AIO computers embodiment in, high-definition multimedia interface dress
It puts 1 and further includes a power-supply unit, after high-definition multimedia interface device 1 is switched on, power-supply unit provides one and opens
Electromechanical source, governor circuit 13 receive booting power supply and operate.Then, high-definition multimedia interface device 1 is predeterminable after powering
For as main control end, switching circuit 15 can be automatically connected according to control signal S5 in the first conducting state.Specifically, as schemed
Shown in 2, governor circuit 13 is coupled to control circuit 12, is automatic drive control circuit 12 after the electricity excessively of governor circuit 13, makes control
Circuit 12 is sent out with corresponding logic level（For example, high logic level）Control signal S5 switching circuit 15 to be controlled to be connected
In the first conducting state.Further, it is connected after the first conducting state in switching circuit 15, the high solution in open state
Analysis multimedia interface device 1 can't be automatically switched to subordinate end by main control end, i.e., switching circuit 15 is in high-definition multimedia circle
Face device 1 can't be automatically switched to the second conducting state when being switched on by the first conducting state, and switching circuit 15 is constantly connected
High-definition multimedia interface device 1 is made to may connect to subordinate end device 2 in the first conducting state.
On the other hand, when high-definition multimedia interface device 1 is not keyed up or operates in basic input output system（BIOS）
Power supply option in some power saving standby modes when, power-supply unit can supply a standby power, at this point, for embedded control
The control circuit 12 of device processed can receive standby power, and standby power is sent to slave circuit 14, is opened from power-supply unit
Powered-down road 15, message broadcast unit 17 and display unit 16, make slave circuit 14, switching circuit 15, message broadcast unit 17 and
Display unit 16 can after standby power is received independent work.Then, high-definition multimedia interface device 1 can be used as subordinate end,
And then it shows video signal and plays message.
In high-definition multimedia interface device 1 as in the embodiment at subordinate end, be connected if switching circuit to be made 15 is automatic
In the second conducting state, as shown in figure 3, control circuit 12 can couple high-definition multimedia interface connectivity port 11 to be coupled to height
The power circuit of definition multimedia interface connectivity port 11.Also, control circuit 12 may include buffer（buffer）, with basis
The direction of power supply signal come generate it is corresponding control signal S5 so that automatic configuration switch circuit 15 conducting state.In detail,
If control circuit 12 detects received signal from high-definition multimedia interface connectivity port 11 by buffer, such as power supply
Input signal S42 represents high-definition multimedia interface device 1 at this time as subordinate end.Then, control circuit 12 generates correspondence
Control signal S5, using the control signal S5 have low logic level can make switching circuit 15 be connected in the second conducting state as
Example, control circuit 12 generate the control signal S5 with low logic level after power supply input signal S42 is detected.Base
This, if the conducting before high-definition multimedia interface device 1 is as subordinate end of switching circuit 15 in the first conducting state, controls
Circuit 12 can generate the control signal S5 for having another logic level according to the power supply input signal S42 from master controlling terminal device 3, make
Switching circuit 15 automatically switches to the second conducting state by the first conducting state, when switching circuit 15 switches to the second conducting state
Later, high-definition multimedia interface device 1 can normal communication in master controlling terminal device 3.
Alternatively, in further embodiments, if slave circuit 14 is not to generate EDID according to power supply input signal S42
Output signal S31 but constantly send EDID output signal S31, control circuit 12 may include another buffer to detect EDID
The direction of signal is to generate corresponding control signal S5.As shown in figure 4, control circuit 12 can be coupled to slave circuit 14, to connect
The EDID signals that slave circuit 14 generates, such as EDID output signal S31 are received, is come from when control circuit 12 detects EDID signals
During slave circuit 14, high-definition multimedia interface device 1 is represented as subordinate end, control circuit 12, which generates, at this time has low logic
The control signal S5 of level, makes switching circuit 15 switch to the second conducting state.
In some embodiments, the user of high-definition multimedia interface device 1 manually mode can also set height
The operation mode of definition multimedia interface device 1, to determine high-definition multimedia interface device 1 as main control end or subordinate end.
As shown in figure 5, a physical button 181 is further included on housing 18 is coupled to control circuit 12, when high-definition multimedia interface device 1
User touch physical button 181 after, physical button 181 can generate a touching signal drive control circuit 12 generate control
Signal S5, and then the conducting state of configuration switch circuit 15 make high-definition multimedia interface device 1 that can be used as subordinate end or master control
End.For example, physical button 181 can in order to control display unit 16 video signal adjustment function（On Screen Display；
OSD）Button, after user presses physical button 181, the video signal adjustment functional menu that display unit 16 is shown is further included and is made
High-definition multimedia interface device 1 can be switched as subordinate end or the setting option of main control end, user by physical button 181
The setting option, control circuit 12 to be driven to generate corresponding control signal S5, and then the conducting of configuration switch circuit 15
State.
Fig. 6 is the appearance diagram of an embodiment being connected to each other according to the high-definition multimedia interface device of the present invention.
Fig. 6 is please referred to, by taking two high-definition multimedia interface devices 4,5 are AIO computers as an example, when two high-definition multimedia interface devices
4th, 5 when being switched on, and the switch in two high-definition multimedia interface devices 4,5 must be set separately in user in a manual fashion at this time
The conducting state of circuit or user can set the conducting state of the switching circuit in one of which, for example, if two is high
Definition multimedia interface device 4,5 is preset as main control end（That is, the switching circuit of two high-definition multimedia interface devices 4,5 exists
Conducting is in the first conducting state in preset state）, user must be by physical button 181,182 by it in two switching circuits at this time
One switches to the second conducting state, makes normally carry out HDMI communications between two high-definition multimedia interface devices 4,5.
In conclusion an embodiment of high-definition multimedia interface device according to the present invention and its control method, Gao Xie
One HDMI connectivity ports of analysis multimedia interface device may connect to master controlling terminal device and subordinate end device.Thus, high solution
Main control end and subordinate end can be used as by analysing multimedia interface device, and compared to prior art, the quantity of HDMI connectivity ports is not required to increase
Add, and then save the production cost of high-definition multimedia interface device.Also, user connects also without visually to recognize HDMI
Port is connect as input port or output port, so just improves ease of use.
Although the present invention with embodiment it is disclosed above however, it is not to limit the invention, in any technical field
Have usually intellectual, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, therefore the present invention
Protection domain is when subject to appended patent claim institute defender.
Claims (11)
1. a kind of high-definition multimedia interface device, it is characterised in that：Comprising：
One high-definition multimedia interface connectivity port；
One control circuit, to generate a control signal；
One governor circuit, to generate a master control high-definition multimedia interface output signal；
One slave circuit, to generate a subordinate high-definition multimedia interface output signal；And
One switching circuit is coupled to the high-definition multimedia interface connectivity port and the control circuit, and the switching circuit is to root
It is connected according to the control signal-selectivity in one first conducting state and one second conducting state；When the switching circuit is connected in this
First conducting state, the switching circuit are electrically connected at the governor circuit, make the master control high-definition multimedia interface output signal
It is exported via the high-definition multimedia interface connectivity port；When switching circuit conducting is in second conducting state, switch electricity
Road is electrically connected at the slave circuit, makes the subordinate high-definition multimedia interface output signal via the high-definition multimedia interface
Connectivity port exports.
2. high-definition multimedia interface device according to claim 1, it is characterised in that：The governor circuit is more receiving
One subordinate high-definition multimedia interface input signal, the slave circuit more input to receive a master control high-definition multimedia interface
Signal；When the switching circuit is connected in first conducting state, the governor circuit is via the high-definition multimedia interface connecting pin
Mouth receives the subordinate high-definition multimedia interface input signal；When the switching circuit is connected in second conducting state, the subordinate
Circuit receives the master control high-definition multimedia interface input signal via the high-definition multimedia interface connectivity port.
3. high-definition multimedia interface device according to claim 2, it is characterised in that：Master control high-definition multimedia circle
Face output signal includes one and minimizes transmission differential signal output signal and a power output signal, the master control high-definition multimedia
Interface input signal includes one and minimizes transmission differential signal input signal and a power supply input signal, which parses more matchmakers
Body interface input signal includes an extension and shows that identification information input signal and a heat insert detecting input signal, subordinate height parsing
Multimedia interface output signal includes an extension and shows that identification information output signal and a heat insert detecting output signal.
4. high-definition multimedia interface device according to claim 3, it is characterised in that：The control circuit couples high solution
Multimedia interface connectivity port is analysed, and the switching circuit is connected according to a logic level of the control signal in the first conducting shape
After state, if the control circuit receives the power supply input signal via the high-definition multimedia interface connectivity port, control electricity
Road generates the control signal with another logic level, and the switching circuit is made to switch to this by first conducting state and second is led
Logical state.
5. high-definition multimedia interface device according to claim 3, it is characterised in that：The control circuit couples the subordinate
Circuit, and the switching circuit is connected according to a logic level of the control signal after first conducting state, if the control
Circuit receives the extension via the slave circuit and shows identification information output signal, which, which generates, has another logical bit
The accurate control signal, makes the switching circuit switch to second conducting state by first conducting state.
6. high-definition multimedia interface device according to any one of claim 4 or 5, it is characterised in that：Control electricity
Road is embedded controller, the control circuit receive a standby power for should slave circuit and the switching circuit running.
7. high-definition multimedia interface device according to claim 1, it is characterised in that：The governor circuit is coupled to the control
Circuit processed, the governor circuit are platform courses maincenter device, which is embedded controller, which receives one and open
Electromechanical source and the embedded controller is driven to generate the control signal, make the switching circuit conducting in first conducting state.
8. high-definition multimedia interface device according to claim 1, it is characterised in that：A housing is further included, the housing
To house the high-definition multimedia interface connectivity port, the control circuit, the governor circuit, the slave circuit and switch electricity
Road, and a physical button is formed on the housing, to receive a touching to generate a touching signal, the control circuit is according to this
It touches signal and generates the corresponding control signal.
9. high-definition multimedia interface device according to claim 8, it is characterised in that：A display unit is further included to house
In the housing, the video signal adjustment functional menu shown by the display unit further includes the one of the conducting state of the switching circuit
Option is set, which receives the touching to change the setting option, and the control circuit is made to generate corresponding control letter
Number.
10. a kind of control method of high-definition multimedia interface device, it is characterised in that：Comprising：
A master control high-definition multimedia interface output signal is generated via a governor circuit；
The governor circuit and a high-definition multimedia interface connectivity port are electrically connected via a switching circuit, makes the master control high solution
Multimedia interface output signal is analysed to export via the high-definition multimedia interface connectivity port；
A subordinate high-definition multimedia interface output signal is generated via a slave circuit；And
The slave circuit and the high-definition multimedia interface connectivity port are electrically connected via the switching circuit, makes the subordinate high solution
Multimedia interface output signal is analysed to export via the high-definition multimedia interface connectivity port.
11. the control method of high-definition multimedia interface device according to claim 10, it is characterised in that：It further includes：
A subordinate high-definition multimedia interface input signal is received via the high-definition multimedia interface connectivity port；
The governor circuit and the high-definition multimedia interface connectivity port are electrically connected via the switching circuit, makes the governor circuit
Via the high-definition multimedia interface, connectivity port receives the subordinate high-definition multimedia interface input signal；
A master control high-definition multimedia interface input signal is received via the high-definition multimedia interface connectivity port；And
The slave circuit and the high-definition multimedia interface connectivity port are electrically connected via the switching circuit, makes the slave circuit
Via the high-definition multimedia interface, connectivity port receives the master control high-definition multimedia interface input signal.
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| CN108205512B (en) | 2021-08-13 |
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