CN104636096A - Graphic card and electronic device - Google Patents
Graphic card and electronic device Download PDFInfo
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- CN104636096A CN104636096A CN201310551666.1A CN201310551666A CN104636096A CN 104636096 A CN104636096 A CN 104636096A CN 201310551666 A CN201310551666 A CN 201310551666A CN 104636096 A CN104636096 A CN 104636096A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1415—Digital output to display device ; Cooperation and interconnection of the display device with other functional units with means for detecting differences between the image stored in the host and the images displayed on the displays
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1431—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using a single graphics controller
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Abstract
The invention provides a graphic card and an electronic device. The graphic card comprises a GPU, an HDMI auxiliary signal circuit, a DP auxiliary signal circuit, a gate circuit and a multimedia connector, wherein the multimedia connector is used for outputting the detection signal used for making whether a plug inserted into the multimedia connector is an HDMI plug or a DP plug to the GPU and correspondingly serves as an HDMI connector or a DP connector. The GPU is used for sending a gating instruction to the gate circuit according to the detection signal. The HDMI auxiliary signal circuit is used for transmitting HDMI signals between the GPU and the multimedia connector. The DP auxiliary signal circuit is used for transmitting DP signals between the GPU and the multimedia connector. The gate circuit is used for enabling the HDMI signals or the DP signals to be transmitted between the GPU and the multimedia connector according to the gating instruction. The graphic card can simultaneously support both the HDMI plug and the DP plug without any adaptor, and therefore the value of the graphic card is improved, and the cost for purchasing a DP or HDMI adaptor is eliminated for a user.
Description
Technical field
The present invention generally relates to electronic equipment, and relates more specifically to graphics card and comprise the electronic equipment of graphics card.
Background technology
Display port (Display Port, and HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface DP), HDMI), such as A type (TYPE A), be popular video transmission interface, in most of current main flow graphics card and display, be obtained for support.Sometimes, but connector on the graphics card of user is supported HDMI A type plug is not supported DP plug, but the display of user only supports that DP connector or display can support HDMI A type connector and DP connector, but user only has a DP cable to connect display and graphics card simultaneously.In this case, user must buy HDMI A type and turns DP adapter or HDMI A type cable.The display that also likely user has only supports HDMI A type connector, but the connector on the graphics card of user is DP connector.In this case, DP must be bought and turn HDMI A type adapter.This causes inconvenience to daily life.
Summary of the invention
Therefore, need to provide a kind of graphics card to solve the problems referred to above.
In one embodiment, a kind of graphics card is disclosed.Described graphics card comprises Graphics Processing Unit (Graphic Processing Unit, GPU), HDMI auxiliary signal circuit, DP auxiliary signal circuit, gating circuit and multimedia connector.The plug that multimedia connector is used for inserting to GPU output identification multimedia connector is the detection signal of HDMI plug or DP plug and is correspondingly used as HDMI connector or DP connector.GPU is used for sending gating command according to detection signal to gating circuit.HDMI auxiliary signal circuit is used between GPU and multimedia connector, transmit HDMI signal.DP auxiliary signal circuit is used between GPU and multimedia connector, transmit DP signal.Gating circuit is used for according to gating command, HDMI signal or DP signal being transmitted between GPU and multimedia connector.
Preferably, multimedia connector comprises pick-up unit, pick-up unit comprises detection shell fragment, contact and detection pin, detecting shell fragment according to inserting the plug of multimedia connector is that HDMI plug or DP plug are electrically connected with contact or disconnect and be electrically connected, make when insert the plug of multimedia connector be HDMI plug or DP plug time detection signal there is different value, detect pin to be electrically connected with contact, for output detections signal.
Preferably, GPU comprises universal input/output interface (General Purpose Input Output, GPIO), and GPU receives the detection signal of Autonomous test pin via GPIO.
Preferably, GPU is further used for four Difference signal pairs and four grounded signal to be sent to multimedia connector via the transfer path beyond HDMI auxiliary signal circuit and DP auxiliary signal circuit.
Preferably, transfer path comprises multiple capacitor, for blocking the DC current in transfer path.
Preferably, multimedia connector comprises 20 pins, and four Difference signal pairs and four grounded signal are via the transmission of 1-12 pin.
Preferably, HDMI signal comprises consumer electronics and controls (Consumer Electronics Control, CEC) signal, stick signal, serial time clock line (Serial Clock Line, SCL) signal, serial data line (Serial Data Line, SDA) signal, DDC (Display Data Channel, DDC)/CEC ground signalling ,+5V power supply signal and hot plug detect (Hot Plug Detect, HPD) signal.
Preferably, CEC signal is via the 13rd pin transmission, stick signal is via the 14th pin transmission, SCL signal is via the 15th pin transmission, SDA signal is via the 16th pin transmission, DDC/CEC ground signalling is via the 17th pin transmission, and+5V power supply signal is via the 18th pin transmission, and HPD signal is via the 19th pin transmission.
Preferably, HDMI auxiliary signal circuit comprises DDC impact damper and multiple pull-up resistor, for being the voltage meeting HDMI specification by the voltage transitions of SCL signal and SDA signal.
Preferably, HDMI auxiliary signal circuit comprises power supply voltage converting circuit, for the power supply signal from GPU is converted to+5V power supply signal.
Preferably, DP signal comprises two User Defined signals, the actual signal of accessory channel, ground signalling, the auxiliary signal of accessory channel, HPD signal, joint power supply return signal and joint power supply signal.
Preferably, two User Defined signals are respectively via the 13rd and 14 pin transmission, the actual signal of accessory channel is via the 15th pin transmission, ground signalling is via the 16th pin transmission, the auxiliary signal of accessory channel is via the 17th pin transmission, HPD signal is via the 18th pin transmission, and joint power supply return signal is via the 19th pin transmission, and joint power supply signal is via the 20th pin transmission.
Preferably, gating circuit is between GPU and HDMI auxiliary signal circuit and DP auxiliary signal circuit or at HDMI auxiliary signal circuit with between DP auxiliary signal circuit and multimedia connector.
In another embodiment, a kind of electronic equipment is provided.Described electronic equipment comprises graphics card.Graphics card comprises GPU, HDMI auxiliary signal circuit, DP auxiliary signal circuit, gating circuit and multimedia connector.The plug that multimedia connector is used for inserting to GPU output identification multimedia connector is the detection signal of HDMI plug or DP plug and is correspondingly used as HDMI connector or DP connector.GPU is used for sending gating command according to detection signal to gating circuit.HDMI auxiliary signal circuit is used between GPU and multimedia connector, transmit HDMI signal.DP auxiliary signal circuit is used between GPU and multimedia connector, transmit DP signal.Gating circuit is used for according to gating command, HDMI signal or DP signal being transmitted between GPU and multimedia connector.
Preferably, multimedia connector comprises pick-up unit, pick-up unit comprises detection shell fragment, contact and detection pin, detecting shell fragment according to inserting the plug of multimedia connector is that HDMI plug or DP plug are electrically connected with contact or disconnect and be electrically connected, make when insert the plug of multimedia connector be HDMI plug or DP plug time detection signal there is different value, detect pin to be electrically connected with contact, for output detections signal.
Preferably, GPU comprises GPIO, and GPU receives the detection signal of Autonomous test pin via GPIO.
Preferably, GPU is further used for four Difference signal pairs and four grounded signal to be sent to multimedia connector via the transfer path beyond HDMI auxiliary signal circuit and DP auxiliary signal circuit.
Preferably, transfer path comprises multiple capacitor, for blocking the DC current in transfer path.
Preferably, multimedia connector comprises 20 pins, and four Difference signal pairs and four grounded signal are via the transmission of 1-12 pin.
Preferably, gating circuit is between GPU and HDMI auxiliary signal circuit and DP auxiliary signal circuit or at HDMI auxiliary signal circuit with between DP auxiliary signal circuit and multimedia connector.
The graphics card with compatible multimedia connector can be supported HDMI plug and DP plug simultaneously and without the need to any adapter, therefore can improve the value of graphics card and help user to save the cost buying DP or HDMI adapter.
Below in conjunction with accompanying drawing, describe advantages and features of the invention in detail.
Accompanying drawing explanation
In order to make advantage of the present invention be easier to understand, concise and to the point the present invention described above will be described in more detail by reference to specific embodiment illustrated in the accompanying drawings.Be appreciated that these accompanying drawings depict only exemplary embodiments of the present invention, therefore should do not think the restriction to its protection domain, described and explanation the present invention with additional characteristic and details by accompanying drawing.
Fig. 1 shows the schematic block diagram of the graphics card according to the embodiment of the present invention;
Fig. 2 shows the schematic plan of the schematic elevational view of multimedia connector and the pick-up unit of amplification;
Fig. 3 a shows the circuit diagram of HDMI auxiliary signal circuit according to the embodiment of the present invention and some adjunct circuits; And
Fig. 3 b shows the circuit diagram of DP auxiliary signal circuit according to the embodiment of the present invention and other adjunct circuit.
Embodiment
In discussion hereafter, give details to provide more thorough understanding of the invention.But those skilled in the art can understand, the present invention can be implemented without the need to these details one or more.In specific example, in order to avoid obscuring with the present invention, technical characteristics more well known in the art are at large described.
Below of the present disclosure in embodiment, HDMI plug is HDMI A type plug.HDMI connector is HDMI A type connector.
According to an aspect of the present invention, a kind of graphics card is disclosed.Fig. 1 shows the schematic block diagram of the graphics card 100 according to the embodiment of the present invention.Graphics card 100 comprises GPU101, HDMI auxiliary signal circuit 102, DP auxiliary signal circuit 103, gating circuit 104 and multimedia connector 105.The plug that multimedia connector 105 may be used for inserting to GPU101 output identification multimedia connector 105 is the detection signal of HDMI plug or DP plug and is correspondingly used as HDMI connector or DP connector.Multimedia connector 105 can export corresponding detection signal according to the type of the plug inserting it to GPU101.Such as, when the plug inserting multimedia connector 105 is HDMI plug, multimedia connector 105 can be high level to the detection signal that GPU101 inputs, and when the plug inserting multimedia connector 105 is DP plug, the detection signal that multimedia connector 105 inputs to GPU101 can be low level, and vice versa.GPU101 may be used for sending gating command according to detection signal to gating circuit 104.GPU101 can use gating command to control gating circuit 104 to select to transmit in HDMI signal and DP signal.HDMI auxiliary signal circuit 102 may be used for transmitting HDMI signal between GPU101 and multimedia connector 105.DP auxiliary signal circuit 103 may be used for transmitting DP signal between GPU101 and multimedia connector 105.Gating circuit 104 may be used for according to gating command, HDMI signal or DP signal being transmitted between GPU101 and multimedia connector 105.When the plug inserting multimedia connector 105 is HDMI plug, gating circuit 104 can make according to gating command the transfer path conducting comprising GPU101, HDMI auxiliary signal circuit 102 and multimedia connector 105, can transmit to make HDMI signal between GPU101 and multimedia connector 105.When the plug inserting multimedia connector 105 is DP plug, gating circuit 104 can make according to gating command the transfer path conducting comprising GPU101, DP auxiliary signal circuit 103 and multimedia connector 105, can transmit to make DP signal between GPU101 and multimedia connector 105.
Graphics card disclosed by the invention can support HDMI A type plug and DP plug and without the need to any adapter simultaneously.Therefore, this graphics card 100 can reduce the use cost of user to existing equipment, and is user-friendly to.
In one embodiment, multimedia connector 105 can comprise pick-up unit.Fig. 2 shows the schematic plan of the schematic elevational view of multimedia connector 105 and the pick-up unit 1054 of amplification.The insulating body that multimedia connector 105 can also comprise metal shell 1051 and be arranged in metal shell 1051.The tongue piece 1052 that insulating body can comprise pedestal (not shown) and extend forward along base level.Multimedia connector 100 can also comprise multiple pin bores 1053, is arranged on tongue piece 1052.Pick-up unit 1054 can comprise detection shell fragment 1054a, contact 1054b and detect pin 1054c.Detect pin 1054c to be electrically connected with contact, for output detections signal.Detecting shell fragment 1054a can be that HDMI (High Definition Multimedia Interface) plug or display port plug are electrically connected with contact or disconnect and be electrically connected according to the plug inserting multimedia connector 105, make the plug when insertion multimedia connector 105 be HDMI plug or DP plug time detection signal there is different value.
In one embodiment, pick-up unit 1054 can utilize the shape difference between HDMI plug and DP plug to detect the type of the plug inserting multimedia connector 105.Such as, the lower left corner of DP plug is right angle, and the lower left corner of HDMI plug is oblique angle.Accommodation space can be reserved in the lower right corner of metal shell 101, and detection shell fragment 1054a and contact 1054b is arranged in this accommodation space.When HDMI plug inserts multimedia connector 105, pick-up unit 1054 is not triggered because its lower left corner is oblique angle.And when DP plug insert multimedia connector 105 time, pick-up unit 1054 due to its lower left corner be that right angle is triggered.
In one embodiment, detect shell fragment 1054a and contact 1054b and disconnect electrical connection, and detect shell fragment 1054a and be electrically connected with metal shell 1051 under normal conditions.Metal shell 1051 is via the multiple fixing pin ground connection on metal shell 1051.So detecting shell fragment 1054a is ground connection under normal conditions.Detect pin 1054c and be electrically connected to supply voltage via contact 1054b under normal conditions, and contact 1054b can be connected to supply voltage via pull-up resistor.In fig. 2, showing supply voltage is positive voltage, but one of ordinary skill in the art will appreciate that, this supply voltage also can be negative voltage.When HDMI plug inserts multimedia connector 105, detect shell fragment 1054a and do not compressed, the detection signal that therefore detection pin exports remains high level.And when DP plug inserts multimedia connector 105, detect shell fragment 1054a and be electrically connected with contact 1054b owing to being subject to the compressing of lower left corner part of DP plug.Contact 1054b and detection pin 1054c is ground connection via detection shell fragment 1054a.Therefore, the detection signal that detection pin 1054c exports becomes low level.That is, when HDMI plug inserts multimedia connector 105, the value of detection signal remains " 1 ", and when DP plug inserts multimedia connector 105, the value of detection signal becomes " 0 " from " 1 ".Therefore, GPU101 can judge the type of the plug inserting multimedia connector 100 according to the value of detection signal.
In the embodiment shown in above-mentioned Fig. 2, detect shell fragment 1054a and be used for ground connection, and contact 1054b is connected to supply voltage.One of ordinary skill in the art will appreciate that, also detection shell fragment 1054a can be connected to supply voltage, and by contact 1054b via resistance eutral grounding.
In one embodiment, GPU101 can comprise GPIO.GPU101 can receive via GPIO the detection signal of Autonomous test pin.GPIO106 is comprised referring back to Fig. 1, GPU101.GPIO106 can via I2C(Inter-Integrated Circuit) bus is connected with detection pin 1054c.The detection signal that detection pin 1054c exports can identify the type of the plug inserting multimedia connector 100, so GPU101 can receive detection signal via GPIO106, can send gating command afterwards according to this detection signal.
In one embodiment, GPU101 can be further used for four Difference signal pairs and four grounded signal to be sent to multimedia connector 105 via the transfer path beyond HDMI auxiliary signal circuit 102 and DP auxiliary signal circuit 103.As shown in Figure 1, four Difference signal pairs and four grounded signal are sent to multimedia connector 105 via transfer path 107 by GPU101.HDMI connector transmits transition minimized differential signaling (Transition Minimized Differential signal, TMDS).TMDS has four passages, and first three is RGB or YPbPr data channel, and last is clock lane.What every bar passage transmitted is a Difference signal pair, therefore, has four Difference signal pairs.In addition, TMDS also has four grounded signal.DP connector transmits the signal through 8B/10B coding.Link clock can be embedded in data stream by 8B/10B coding techniques.DP connector can use four passages to transmit data, and each passage is synchronous with the link clock of embedding.What every bar passage transmitted is a Difference signal pair, therefore, has four Difference signal pairs.In addition, four grounded signal is also comprised in the signal that DP connector transmits.Therefore, the plug no matter inserting multimedia connector 105 is HDMI plug or DP plug, all needs four Difference signal pairs and four grounded signal to be sent to multimedia connector 105 from GPU101.Therefore, can via single path, four Difference signal pairs and four grounded signal are directly sent to the type transmission that multimedia connector 105 and not according to insert the plug of multimedia connector 105 by such as transfer path 107.Can avoid increasing extra circuit by identical path above-mentioned four Difference signal pairs of transmission and four grounded signal, and can economize energy, simplified design.
In one embodiment, transfer path 107 can comprise multiple capacitor, for blocking the DC current in transfer path 107.Fig. 3 a shows the circuit diagram of HDMI auxiliary signal circuit 102 according to the embodiment of the present invention and some adjunct circuits.In fig. 3 a, transfer path 107 comprises two capacitors.It should be appreciated by those skilled in the art that and can arrange in transfer path 107 as required or multiple capacitor is not set to block the DC current in transfer path 107.
In one embodiment, multimedia connector 105 can comprise 20 pins.Four Difference signal pairs and four grounded signal can via the transmission of 1-12 pin.HDMI connector has 19 pins, and DP connector has 20 pins.Therefore, multimedia connector 105 can comprise 20 pins, with compatible with HDMI plug and DP plug.The arrangement mode of these 20 pins meets DP specification.Table 1 and table 2 respectively illustrate the pinout of HDMI A type and DP.As shown in Table 1 and Table 2, the definition of the 1-12 pin of HDMI A type and the 1-12 pin of DP is similar, both defines the transmission pin of four Difference signal pairs and four grounded signal.Therefore, in graphics card 100, can be via the transmission of 1-12 pin by four Difference signal pairs and four grounded signal definition.It should be appreciated by those skilled in the art that the number of the pin of multimedia connector 105 can be any other suitable number that can meet compatibility requirements.
The pinout of table 1HDMI A type
| Pin number | Pin name |
| 1 | TMDS Data2+ |
| 2 | TMDS Data2Shield |
| 3 | TMDS Data2- |
| 4 | TMDS Data1+ |
| 5 | TMDS Data1Shield |
| 6 | TMDS Data1- |
| 7 | TMDS Data0+ |
| 8 | TMDS Data0Shield |
| 9 | TMDS Data0- |
| 10 | TMDS Clock+ |
| 11 | TMDS Clock Shield |
| 12 | TMDS Clock- |
| 13 | CEC |
| 14 | Utility(Reserved) |
| 15 | SCL |
| 16 | SDA |
| 17 | DDC/CEC Ground |
| 18 | +5V Power |
| 19 | Hot Plug Detect |
The pinout of table 2DP
| Pin number | Signal type | Pin name |
| 1 | Out | ML_Lane0(p) |
| 2 | GND | GND |
| 3 | Out | ML_Lane0(n) |
| 4 | Out | ML_Lane1(p) |
| 5 | GND | GND |
| 6 | Out | ML_Lane1(n) |
| 7 | Out | ML_Lane2(p) |
| 8 | GND | GND |
| 9 | Out | ML_Lane2(n) |
| 10 | Out | ML_Lane3(p) |
| 11 | GND | GND |
| 12 | Out | ML_Lane3(n) |
| 13 | CONFIG | CONFIG1 |
| 14 | CONFIG | CONFIG2 |
| 15 | I/O | AUX_CH(p) |
| 16 | GND | GND |
| 17 | I/O | AUX_CH(n) |
| 18 | In | Hot Plug Detect |
| 19 | RTN | Return |
| 20 | PWR Out | DP_PWR |
In one embodiment, HDMI signal can comprise CEC signal, stick signal, SCL signal, SDA signal, DDC/CEC ground signalling ,+5V power supply signal and HPD signal.CEC signal can transmit on CEC passage.CEC signal can be audio A MP.AMp.Amp video link (Audio & Video-Link, the AV-Link) protocol signal of commercial size, to support with single remote controller operation multiple stage AV machine.CEC signal is two-way transmission signal.SCL signal is DDC clock line signal, and SDA is DDC data line signal.Graphics card and display can utilize DDC signal to know transmission each other and receiving ability.Such as, DDC signal can comprise the extending display identification data (Extended Display Identification Data, EDID) of display.GPU101 can receive DDC signal to obtain the EDID of display.HPD signal can be sent to GPU101 from display.Whether HPD signal can send the foundation of TMDS signal as GPU101.Such as, when GPU101 is connected with graphics card 100 according to HPD signal determination display, GPU101 can by the EDID of DDC passage reading displayed device.If determine that the mode of operation scope of display and graphics card 100 adapt, then GPU101 can send TMDS signal.When GPU101 disconnects according to HPD signal determination display and graphics card 100, GPU101 can interrupt the transmission to TMDS signal.
In one embodiment, CEC signal is via the 13rd pin transmission, stick signal is via the 14th pin transmission, SCL signal is via the 15th pin transmission, SDA signal is via the 16th pin transmission, DDC/CEC ground signalling is via the 17th pin transmission, and+5V power supply signal is via the 18th pin transmission, and HPD signal is via the 19th pin transmission.When the plug of insertion multimedia connector 105 is HDMI A type plugs, the definition of pin meets HDMI A type connector.It should be appreciated by those skilled in the art that the definition of pin can change as required, this is not limited herein.
In one embodiment, HDMI auxiliary signal circuit 102 can comprise DDC impact damper 1021 and multiple pull-up resistor, for being the voltage meeting HDMI specification by the voltage transitions of SCL signal and SDA signal.In HDMI specification, the voltage used, between 4.8V to 5.3V, is preferably 5V.And the standard of the voltage conforms 3.3V voltage that GPU101 exports.Therefore, HDMI auxiliary signal circuit 102 needs voltage GPU101 being input to multimedia interface 105 to carry out suitable conversion.DDC impact damper 1021 and multiple pull-up resistor can help the realization of compatible multimedia connector.
In one embodiment, HDMI auxiliary signal circuit 102 can comprise power supply voltage converting circuit, for the power supply signal from GPU101 is converted to+5V power supply signal.As shown in Figure 3 a, power-switching circuit can comprise voltage stabilizer and diode.Voltage stabilizer is used for the 3.3V power supply signal from GPU101 to be adjusted to 5V power supply signal.Diode is used for the direction of Limited Current, ensures that the power pins of multimedia connector 105 receives correct power supply.
In one embodiment, DP signal comprises two User Defined signals, the actual signal of accessory channel, ground signalling, the auxiliary signal of accessory channel, HPD signal, joint power supply return signal and joint power supply signal.Fig. 3 b shows the circuit diagram of DP auxiliary signal circuit 103 according to the embodiment of the present invention and other adjunct circuit.See Fig. 3 b, be appreciated that the transfer path of each signal.In DP specification, the voltage used is 3.3V, is consistent with the voltage that GPU101 exports, so DP auxiliary signal circuit 103 does not need the voltage to GPU101 exports to change.
In one embodiment, two User Defined signals are respectively via the 13rd and 14 pin transmission, the actual signal of accessory channel is via the 15th pin transmission, ground signalling is via the 16th pin transmission, the auxiliary signal of accessory channel is via the 17th pin transmission, HPD signal is via the 18th pin transmission, and joint power supply return signal is via the 19th pin transmission, and joint power supply signal is via the 20th pin transmission.The actual signal of accessory channel and the auxiliary signal of accessory channel transmit on accessory channel, can comprise status information, control command etc.When the plug of insertion multimedia connector 105 is DP plugs, the definition of pin meets DP connector.It should be appreciated by those skilled in the art that the definition of pin can change as required, this is not limited herein.
In one embodiment, gating circuit 104 can between GPU101 and HDMI auxiliary signal circuit 102 and DP auxiliary signal circuit 103 or at HDMI auxiliary signal circuit 102 with between DP auxiliary signal circuit 103 and multimedia connector 105.Referring back to Fig. 1, show gating circuit 104 in HDMI auxiliary signal circuit 102 and the situation between DP auxiliary signal circuit 103 and multimedia connector 105.Gating circuit 104 can make a conducting in the transfer path of HDMI signal or the transfer path of DP signal, and it can play the effect of switch.The logical circuit that gating circuit 104 can be made up of such as transistor.The position of gating circuit 104 is variable.
According to another aspect of the present invention, a kind of electronic equipment is disclosed.Electronic equipment comprises graphics card.Graphics card can comprise GPU, HDMI auxiliary signal circuit, DP auxiliary signal circuit, gating circuit and multimedia connector.The plug that multimedia connector may be used for inserting to GPU output identification multimedia connector is the detection signal of HDMI plug or DP plug and is correspondingly used as HDMI connector or DP connector.GPU may be used for sending gating command according to detection signal to gating circuit.HDMI auxiliary signal circuit may be used between GPU and multimedia connector, transmit HDMI signal.DP auxiliary signal circuit may be used between GPU and multimedia connector, transmit DP signal.Gating circuit may be used for according to gating command, HDMI signal or DP signal being transmitted between GPU and multimedia connector.
In one embodiment, multimedia connector can comprise pick-up unit.Pick-up unit can comprise detection shell fragment, contact and detection pin.Detect shell fragment to be electrically connected with contact or to disconnect according to the type of plug inserting multimedia connector and be electrically connected, make the plug when insertion multimedia connector be HDMI plug or DP plug time detection signal there is different value.Detect pin to be electrically connected with contact, for output detections signal.
In one embodiment, GPU can comprise GPIO.GPU can receive via GPIO the detection signal of Autonomous test pin.
In one embodiment, GPU can be further used for four Difference signal pairs and four grounded signal to be sent to multimedia connector via the transfer path beyond HDMI auxiliary signal circuit and DP auxiliary signal circuit.
In one embodiment, transfer path can comprise multiple capacitor, for blocking the DC current in transfer path.
In one embodiment, multimedia connector can comprise 20 pins.Four Difference signal pairs and four grounded signal can via the transmission of 1-12 pin.
In one embodiment, gating circuit can between GPU and HDMI auxiliary signal circuit and DP auxiliary signal circuit or at HDMI auxiliary signal circuit with between DP auxiliary signal circuit and multimedia connector.
Above about in the description of graphics card, GPU, HDMI auxiliary signal circuit involved by electronic equipment, DP auxiliary signal circuit, gating circuit and multimedia connector are described.Concrete structure and the method for operation of electronic equipment can be understood about the description of the embodiment of graphics card above those skilled in the art also combines with reference to figure 1-3b.For simplicity, omit it at this to specifically describe.
In order to be described, aforementioned description have references to specific embodiment and is described.But exemplary discussion above is also not intended to be without omitting ground or limiting the present invention to disclosed in form clear and definite.In view of above instruction, also likely there is a lot of modification and change.Select and describe embodiment, to explain principle of the present invention and practical application best, utilize the present invention best to make others skilled in the art and there are the various embodiments of various modification, so that the special-purpose expected can be applicable to.
Be thus described according to embodiments of the invention.Although the disclosure is described in a particular embodiment, should understand, the present invention should not be construed as and limited by these embodiments, and should understand according to claim.
Claims (20)
1. a graphics card, comprises Graphics Processing Unit, HDMI (High Definition Multimedia Interface) auxiliary signal circuit, display port auxiliary signal circuit, gating circuit and multimedia connector,
The plug that described multimedia connector is used for inserting described multimedia connector to described Graphics Processing Unit output identification is the detection signal of HDMI (High Definition Multimedia Interface) plug or display port plug and is correspondingly used as high definition multimedia interface connector or display port connector;
Described Graphics Processing Unit is used for sending gating command according to described detection signal to described gating circuit;
Described HDMI (High Definition Multimedia Interface) auxiliary signal circuit is used between described Graphics Processing Unit and described multimedia connector, transmit described HDMI (High Definition Multimedia Interface) signal;
Described display port auxiliary signal circuit is used between described Graphics Processing Unit and described multimedia connector, transmit described display port signal; And
Described gating circuit is used for according to described gating command, described HDMI (High Definition Multimedia Interface) signal or described display port signal being transmitted between described Graphics Processing Unit and described multimedia connector.
2. graphics card as claimed in claim 1, it is characterized in that, described multimedia connector comprises pick-up unit, described pick-up unit comprises detection shell fragment, contact and detection pin, described detection shell fragment is that HDMI (High Definition Multimedia Interface) plug or display port plug are electrically connected with described contact or disconnect and be electrically connected according to inserting the plug of described multimedia connector, make when insert the plug of described multimedia connector be HDMI (High Definition Multimedia Interface) plug or display port plug time described detection signal there is different value, described detection pin is electrically connected with described contact, for exporting described detection signal.
3. graphics card as claimed in claim 2, it is characterized in that, described Graphics Processing Unit comprises universal input/output interface, and described Graphics Processing Unit receives the described detection signal from described detection pin via described universal input/output interface.
4. graphics card as claimed in claim 1, it is characterized in that, described Graphics Processing Unit is further used for four Difference signal pairs and four grounded signal to be sent to described multimedia connector via the transfer path beyond described HDMI (High Definition Multimedia Interface) auxiliary signal circuit and described display port auxiliary signal circuit.
5. graphics card as claimed in claim 4, it is characterized in that, described transfer path comprises multiple capacitor, for blocking the DC current in described transfer path.
6. graphics card as claimed in claim 4, it is characterized in that, described multimedia connector comprises 20 pins, and described four Difference signal pairs and four grounded signal are via the transmission of 1-12 pin.
7. graphics card as claimed in claim 6, it is characterized in that, described HDMI (High Definition Multimedia Interface) signal comprises consumer electronics control signal, stick signal, serial time clock line signal, serial data line signal, DDC/consumer electronics control ground signalling ,+5V power supply signal and hot plug detection signal.
8. graphics card as claimed in claim 7, it is characterized in that, described consumer electronics control signal is via the 13rd pin transmission, described stick signal is via the 14th pin transmission, described serial time clock line signal is via the 15th pin transmission, and described serial data line signal is via the 16th pin transmission, and described DDC/consumer electronics control ground signalling via the 17th pin transmission, described+5V power supply signal is via the 18th pin transmission, and described hot plug detection signal is via the 19th pin transmission.
9. graphics card as claimed in claim 7, it is characterized in that, described HDMI (High Definition Multimedia Interface) auxiliary signal circuit comprises DDC impact damper and multiple pull-up resistor, for being the voltage meeting HDMI (High Definition Multimedia Interface) specification by the voltage transitions of described serial time clock line signal and described serial data line signal.
10. graphics card as claimed in claim 7, it is characterized in that, described HDMI (High Definition Multimedia Interface) auxiliary signal circuit comprises power supply voltage converting circuit, for the power supply signal from described Graphics Processing Unit being converted to described+5V power supply signal.
11. graphics cards as claimed in claim 6, it is characterized in that, described display port signal comprises two User Defined signals, the actual signal of accessory channel, ground signalling, the auxiliary signal of accessory channel, hot plug detection signal, joint power supply return signal and joint power supply signal.
12. graphics cards as claimed in claim 11, it is characterized in that, described two User Defined signals are respectively via the 13rd and 14 pin transmission, the actual signal of described accessory channel is via the 15th pin transmission, described ground signalling is via the 16th pin transmission, and the auxiliary signal of described accessory channel is via the 17th pin transmission, and described hot plug detection signal is via the 18th pin transmission, described joint power supply return signal is via the 19th pin transmission, and described joint power supply signal is via the 20th pin transmission.
13. graphics cards as claimed in claim 1, it is characterized in that, described gating circuit is in described Graphics Processing Unit and between described HDMI (High Definition Multimedia Interface) auxiliary signal circuit and described display port auxiliary signal circuit or at described HDMI (High Definition Multimedia Interface) auxiliary signal circuit with between described display port auxiliary signal circuit and described multimedia connector.
14. 1 kinds of electronic equipments, comprise graphics card, and described graphics card comprises Graphics Processing Unit, HDMI (High Definition Multimedia Interface) auxiliary signal circuit, display port auxiliary signal circuit, gating circuit and multimedia connector,
The plug that described multimedia connector is used for inserting described multimedia connector to described Graphics Processing Unit output identification is the detection signal of HDMI (High Definition Multimedia Interface) plug or display port plug and is correspondingly used as high definition multimedia interface connector or display port connector;
Described Graphics Processing Unit is used for sending gating command according to described detection signal to described gating circuit;
Described HDMI (High Definition Multimedia Interface) auxiliary signal circuit is used between described Graphics Processing Unit and described multimedia connector, transmit described HDMI (High Definition Multimedia Interface) signal;
Described display port auxiliary signal circuit is used between described Graphics Processing Unit and described multimedia connector, transmit described display port signal; And
Described gating circuit is used for according to described gating command, described HDMI (High Definition Multimedia Interface) signal or described display port signal being transmitted between described Graphics Processing Unit and described multimedia connector.
15. electronic equipments as claimed in claim 14, it is characterized in that, described multimedia connector comprises pick-up unit, described pick-up unit comprises detection shell fragment, contact and detection pin, described detection shell fragment is that HDMI (High Definition Multimedia Interface) plug or display port plug are electrically connected with described contact or disconnect and be electrically connected according to inserting the plug of described multimedia connector, make when insert the plug of described multimedia connector be HDMI (High Definition Multimedia Interface) plug or display port plug time described detection signal there is different value, described detection pin is electrically connected with described contact, for exporting described detection signal.
16. electronic equipments as claimed in claim 15, it is characterized in that, described Graphics Processing Unit comprises universal input/output interface, and described Graphics Processing Unit receives the described detection signal from described detection pin via described universal input/output interface.
17. electronic equipments as claimed in claim 14, it is characterized in that, described Graphics Processing Unit is further used for four Difference signal pairs and four grounded signal to be sent to described multimedia connector via the transfer path beyond described HDMI (High Definition Multimedia Interface) auxiliary signal circuit and described display port auxiliary signal circuit.
18. electronic equipments as claimed in claim 17, it is characterized in that, described transfer path comprises multiple capacitor, for blocking the DC current in described transfer path.
19. electronic equipments as claimed in claim 17, it is characterized in that, described multimedia connector comprises 20 pins, and described four Difference signal pairs and four grounded signal are via the transmission of 1-12 pin.
20. electronic equipments as claimed in claim 14, it is characterized in that, described gating circuit is in described Graphics Processing Unit and between described HDMI (High Definition Multimedia Interface) auxiliary signal circuit and described display port auxiliary signal circuit or at described HDMI (High Definition Multimedia Interface) auxiliary signal circuit with between described display port auxiliary signal circuit and described multimedia connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310551666.1A CN104636096A (en) | 2013-11-07 | 2013-11-07 | Graphic card and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310551666.1A CN104636096A (en) | 2013-11-07 | 2013-11-07 | Graphic card and electronic device |
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| CN104636096A true CN104636096A (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310551666.1A Pending CN104636096A (en) | 2013-11-07 | 2013-11-07 | Graphic card and electronic device |
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