CN114597706B - HDMI cable assembly and signal transmission method - Google Patents
HDMI cable assembly and signal transmission method Download PDFInfo
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- CN114597706B CN114597706B CN202210262304.XA CN202210262304A CN114597706B CN 114597706 B CN114597706 B CN 114597706B CN 202210262304 A CN202210262304 A CN 202210262304A CN 114597706 B CN114597706 B CN 114597706B
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- 230000008054 signal transmission Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims description 21
- 239000000523 sample Substances 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/631—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/717—Structural association with built-in electrical component with built-in light source
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R29/00—Coupling parts for selective co-operation with a counterpart in different ways to establish different circuits, e.g. for voltage selection, for series-parallel selection, programmable connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
- H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/26—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for engaging or disengaging the two parts of a coupling device
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The application provides an HDMI cable assembly and a signal transmission method, the assembly includes: a cable; a first plug including a first driver for transmitting a differential signal to the first light emitting unit, a second driver for receiving the differential signal from the first light receiving unit, a first light emitting unit, a first light receiving unit, and a first switching chip capable of switching between communication with the first driver or the second driver; and a second plug including a third driver transmitting the differential signal to the second light emitting unit, a fourth driver receiving the differential signal from the second light receiving unit, a second light emitting unit, a second light receiving unit, and a second switching chip capable of switching between communication with the third driver or the fourth driver. Therefore, based on the communication selection function of the switch chip, blind insertion of the first plug and the second plug can be realized.
Description
Technical Field
The application relates to the technical field of HDMI cables, in particular to an HDMI cable assembly and a signal transmission method.
Background
The high definition multimedia interface (High Definition Multimedia Interface, HDMI) is a fully digitized video and audio transmission interface. With the long development and popularization, various electronic devices such as PCs, displays, projectors, set-top boxes, game machines and the like now support HDMI interfaces, and accordingly, the HDMI cable industry is emerging as data transmission between a playback device and a display device.
The conventional HDMI cable is limited by signal loss and cost, and cannot meet the requirement of long-distance transmission, and development of optical communication technology and application in HDMI industry make an HDMI optical-electrical hybrid cable appear on the market, which can meet the requirement of long-distance and low-cost data transmission. However, optical fiber transmission is only one-way transmission, and cannot be used as bidirectional signal transmission, as compared with cable transmission. Therefore, HDMI optical-electrical hybrid cables generally need to define a player port (Source port) and a display port (Sink port) to facilitate unidirectional transmission of video signals from the Source port to the Sink port. Based on this, the two ends of the HDMI photoelectric hybrid cable cannot unconditionally support blind insertion without distinguishing Source end and Sink end, resulting in poor user experience.
Disclosure of Invention
The application provides an HDMI cable assembly and signal transmission method, when HDMI cable assembly connects broadcast end equipment and display end equipment, select between the intercommunication based on switch chip and light emission unit or light receiving unit, can realize the blind of first plug and second plug, and then improve user experience.
The first aspect of the present application provides an HDMI cable assembly, comprising: a cable; the first plug is arranged at one end of the cable and comprises a first driver, a second driver, a first light emitting unit, a first light receiving unit and a first switch chip, wherein the first driver is connected with the first light emitting unit, the second driver is connected with the first light receiving unit, the first driver is used for transmitting differential signals to the first light emitting unit, the second driver is used for receiving the differential signals from the first light receiving unit, the first switch chip is respectively connected with the first driver and the second driver, and the first switch chip can be switched between communication with the first driver or the second driver; the second plug is arranged at the other end of the cable and comprises a third driver, a fourth driver, a second light emitting unit, a second light receiving unit and a second switch chip, the third driver is connected with the second light emitting unit, the fourth driver is connected with the second light receiving unit, the third driver is used for transmitting differential signals to the second light emitting unit, the fourth driver is used for receiving the differential signals from the second light receiving unit, the second switch chip is respectively connected with the third driver and the fourth driver, the second switch chip can be switched between the communication with the third driver or the fourth driver, and the first plug and the second plug realize signal transmission through the combination of the first driver and the fourth driver or the combination of the second driver and the third driver.
In some specific embodiments, the first plug includes a first controller connected to the first driver, the second driver, and the first switch chip, and the second plug includes a second controller connected to the third driver, the fourth driver, and the second switch chip; the first controller is used for switching between the communication of the first switch chip and the first driver or the second driver according to the working state signals of the first driver and the second driver, and the second controller is used for switching between the communication of the second switch chip and the third driver or the fourth driver according to the state signals of the third driver and the fourth driver.
In some embodiments, the cable includes a hot plug signal transmission line, and when the first plug is inserted into one of the play end and the display end, the second plug is inserted into the other of the play end and the display end, and the display end transmits the hot plug signal to the play end through the hot plug signal transmission line; the first controller enables the first switch chip to be communicated with the first driver after detecting that the hot plug signal is a high level signal, and the second controller enables the second switch chip to be communicated with the third driver after detecting that the hot plug signal is a high level signal.
In some specific embodiments, the first controller is provided with a first hot plug signal detection end, the second controller is provided with a second hot plug signal detection end, the first hot plug signal detection end is connected with a hot plug signal transmission line, the second hot plug signal detection end is connected with the hot plug signal transmission line, and the first hot plug detection end and the second hot plug detection end respectively detect hot plug signals.
In some specific embodiments, after the first controller detects a high-level hot plug signal, the first controller detects the working states of the first driver and the second driver respectively, generates a first control signal when detecting that the first driver or the second driver works, and sends the first control signal to the first switch chip, and the first switch chip is communicated with the first driver or the second driver which is working based on the first control signal; after the second controller detects the high-level hot plug signal, the second controller respectively detects the working states of the third driver and the fourth driver, generates a second control signal when detecting the working state of the third driver or the fourth driver, and sends the second control signal to the second switch chip, and the second switch chip is communicated with the working third driver or the working fourth driver based on the second control signal.
In some specific embodiments, the first controller is connected to the status output pins of the first driver and the second driver, respectively, and the second controller is connected to the status output pins of the third driver and the fourth driver, respectively; when the first driver or the second driver works, the first controller detects that the state output pin of the working first driver or second driver is at a low level, and when the third driver or the fourth driver works, the second controller detects that the state output pin of the working third driver or fourth driver is at a low level.
In some embodiments, the first controller includes a first control port connected to the first switch chip, and the second controller includes a second control port connected to the second switch chip; wherein the first controller communicates the first switch chip with the first driver by setting the first control port to a high level, the first controller communicates the first switch chip with the second driver by setting the first control port to a low level, the second controller communicates the second switch chip with the third driver by setting the second control port to a high level, and the second controller communicates the second switch chip with the fourth driver by setting the second control port to a low level.
In some specific embodiments, after detecting that the hot plug signal is a high level signal, the first controller and the second controller continue to detect the hot plug signal at a preset frequency, and after detecting the high level hot plug signal again, connect the first switch chip with the first driver, and connect the second switch chip with the third driver.
A second aspect of the present application provides a signal transmission method based on the HDMI cable assembly of any one of the above, the method comprising: inserting one of the first plug and the second plug into the playing end device, and inserting the other of the first plug and the second plug into the display end device; the first driver or the second driver is communicated through the first switch chip, and the third driver or the fourth driver is communicated through the second switch chip; and transmitting the differential signal of the playing end device to the display end device based on the combination of the communicated first driver and the fourth driver or the combination of the second driver and the third driver.
In some embodiments, the step of communicating to the first driver or the second driver through the first switch chip and to the third driver or the fourth driver through the second switch chip includes: and the communication between the first switch chip and the first driver or the second driver is switched based on the working state signals of the first driver and the second driver, and the communication between the second switch chip and the third driver or the fourth driver is switched based on the state signals of the third driver and the fourth driver.
The application has the following beneficial effects: compared with the prior art, the HDMI cable assembly and the signal transmission method provided by the application select between the communication between the switch chip and the light emitting unit or the light receiving unit when the HDMI cable assembly is connected with the playing end device and the display end device, so that blind insertion of the first plug and the second plug can be realized, and user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of an HDMI cable assembly provided in the present application;
fig. 2 is a schematic structural diagram of another embodiment of an HDMI cable assembly provided in the present application;
fig. 3 is a schematic structural diagram of still another embodiment of an HDMI cable assembly provided in the present application;
fig. 4 is a schematic structural diagram of still another embodiment of an HDMI cable assembly provided in the present application;
fig. 5 is a flowchart of an embodiment of a signal transmission method provided in the present application.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustration of the present application, but do not limit the scope of the present application. Likewise, the following embodiments are only some, but not all, of the embodiments of the present application, and all other embodiments obtained by one of ordinary skill in the art without inventive effort are within the scope of the present application.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented, for example, in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The first aspect of the present application provides an HDMI cable assembly, please refer to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of the HDMI cable assembly provided in the present application, and fig. 2 is a schematic structural diagram of another embodiment of the HDMI cable assembly provided in the present application.
Referring to fig. 1, the hdmi cable assembly 10 includes a first plug 11, a second plug 12, and a cable 13. The first plug 11 is disposed at one end of the cable 13, the second plug 12 is disposed at the other end of the cable 13, one of the first plug 11 and the second plug 12 is inserted into one of the play end device and the display end device, and the other of the first plug 11 and the second plug 12 is inserted into the other of the play end device and the display end device. The playing end device can be a device with playing function such as a computer, a game machine and a set top box, and the display end device can be a device with display function such as a display and a projector, and the playing end device enables the display end device to display based on the display data by transmitting the display data to the display end device.
More specifically, referring to fig. 2, the first plug 11 includes a first driver 111, a first light emitting unit 112, a second driver 113, a first light receiving unit 114, and a first switching chip 115. Wherein the first driver 111 is connected to the first light emitting unit 112, the second driver 113 is connected to the first light receiving unit 114, the first driver 111 is for transmitting a differential signal to the first light emitting unit 112, and the second driver 113 is for receiving the differential signal from the first light receiving unit 114. The first switching chip 115 is connected to the first driver 111 and the second driver 113, respectively, and the first switching chip 115 can switch between communication with the first driver 111 or the second driver 113.
It should be understood that the first driver 111 may be a DRVER driver, the second driver 113 may be a TIA driver, the first light emitting unit 112 may be a laser, and the first light receiving unit 114 may be a PD, i.e., a photodiode. The first driver 111 is configured to transmit the differential signal to the first light emitting unit 112, and to implement driving of the first light emitting unit 112 to convert an electrical signal into an optical signal. The second driver 113 is configured to receive the differential signal from the first light receiving unit 114, and to perform driving of converting the optical signal into an electrical signal by the first light receiving unit 114. The differential signals are high-speed differential signals, which can be high-speed audio/video signals, and can be divided into four groups, namely TMDS2 < + >/-, TMDS1 < + >/-, TMDS0 < + >/-, and CLK < + >/-, respectively.
More specifically, referring to fig. 2, the second plug 12 includes a third driver 121, a second light emitting unit 122, a fourth driver 123, a second light receiving unit 124, and a second switching chip 125. The third driver 121 is connected to the second light emitting unit 122, the fourth driver 123 is connected to the second light receiving unit 124, the third driver 121 is for transmitting the differential signal to the second light emitting unit 122, and the fourth driver 123 is for receiving the differential signal from the second light receiving unit 124. The second switch chip 125 is connected to the third driver 121 and the fourth driver 123, respectively, the second switch chip 125 is capable of switching between communication with the third driver 121 or the fourth driver 123, and the first plug 11 and the second plug 12 realize signal transmission through a combination of the first driver 111 and the fourth driver 123 or a combination of the second driver 113 and the third driver 121.
It should be appreciated that the first driver 111 and the third driver 121 may be the same driver, and the second driver 113 and the fourth driver 123 may be the same driver. The third driver 121 may be a DRVER driver, the fourth driver 123 may be a TIA driver, the second light emitting unit 122 may be a laser, and the first light receiving unit 114 may be a PD, i.e., a photodiode. Reference may be made to the first light emitting unit 112 for the second light emitting unit 122, and to the first light receiving unit 114 for the second light receiving unit 124. When the playback-side device and the display-side device perform data transmission through the HDMI cable assembly 10, the playback-side device transmits data to the fourth driver 123 of the second plug 12 through the first driver 111 of the first plug 11, and further transmits data to the display-side device through the fourth driver 123. Alternatively, the playback-side device transmits data to the second driver 113 of the first plug 11 through the third driver 121 of the second plug 12, and further transmits data to the display-side device through the second driver 113.
Referring to fig. 3, fig. 3 is a schematic structural diagram of another embodiment of an HDMI cable assembly 10 provided in the present application.
In some embodiments, as shown in fig. 3, the first plug 11 includes a first controller 116, and the first controller 116 is connected to the first driver 111, the second driver 113, and the first switch chip 115. The second plug 12 includes a second controller 126, and the second controller 126 is connected to the third driver 121, the fourth driver 123, and the second switching chip 125.
The first controller 116 is configured to switch between the first switch chip 115 and the communication between the first driver 111 or the second driver 113 according to the operation state signals of the first driver 111 and the second driver 113, and the second controller 126 is configured to switch between the second switch chip 125 and the communication between the third driver 121 or the fourth driver 123 according to the state signals of the third driver 121 and the fourth driver 123.
It should be appreciated that the first controller 116 switches the connection of the drivers via the operating status signals of the drivers, and thus enables selection of the drivers for normal data transmission. The same is true for the second controller 126.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another embodiment of an HDMI cable assembly 10 provided in the present application.
As shown in fig. 4, in some embodiments, the cable 13 includes a differential signal transmission line 131 and a non-differential signal transmission line 132, and the non-differential signal transmission line 132 includes a hot plug signal transmission line (HPD) 1321 therein. The differential signal transmission line 131 and the non-differential signal transmission line 132 may be different sub-cables of the cable 13, or may be different transmission channels in the same cable.
When the first plug 11 is inserted into one of the play end device and the display end device, the second plug 12 is inserted into the other of the play end device and the display end device, and the display end device transmits a hot plug signal to the play end device through the hot plug signal transmission line 1321.
Specifically, the non-differential signal transmission line 132 further includes a ground line (GND) 1322 and a cable line 1323, where the ground line 1322 is connected to the first plug 11 and the second plug 12, so as to implement the plug ground; the cable 1323 is used to transmit electric energy from the playback end device to the display end device, so as to realize charging of the display end device. In addition, the non-differential signal transmission line 132 further includes a first sub-transmission line 1324, a second sub-transmission line 1325, a third sub-transmission line 1326, and a fourth sub-transmission line 1327. The first sub-transmission line 1324 is used for transmitting an ARC signal (audio backhaul channel signal) of the playback end device to the display end device, the second sub-transmission line 1325 is used for transmitting SDA signals (data signals) in the playback end device and the display end device to each other, the third sub-transmission line 1326 is used for transmitting SCL signals (clock signals) from the playback end device to the display end device, and the fourth sub-transmission line 1327 is used for transmitting CEC signals (protocol signals) between the playback end device and the display end device to each other.
Referring to fig. 4, the first interface A1 is an HDMI interface of a playback end device, the second interface A2 is an HDMI interface of a display end device, one of the first plug 11 and the second plug 12 is inserted into one of the first interface A1 and the second interface A2, and the other of the first plug 11 and the second plug 12 is inserted into the other of the first interface A1 and the second interface A2. In combination with the above, the display device transmits the hot plug signal to the first interface A1 of the play device through the hot plug signal transmission line 1321 through the second interface A2.
Specifically, after the playback end device and the display end device are successfully connected through the cable 13, the display end device sends a high-level hot plug signal to the playback end device. In connection with the connection mode of the cable 13 of fig. 4, at this time, the first controller 116 makes the first switch chip 115 communicate with the first driver 111 after detecting that the hot plug signal is a high level signal, and the second controller 126 makes the second switch chip 125 communicate with the third driver 121 after detecting that the hot plug signal is a high level signal. Of course, in other embodiments, the second plug 12 may be inserted into the play end device, and the first plug 11 may be inserted into the display end device, where the second switch chip 125 is in communication with the third driver 121, and the first switch chip 115 is in communication with the second driver 113.
The display device sends a high-level hot plug signal to the play device, and the first controller 116 and the second controller 126 can detect the hot plug signal at the same time.
Referring to fig. 4, in some specific embodiments, the first controller 116 is provided with a first hot plug signal detection end 1161, the second controller 126 is provided with a second hot plug signal detection end 1261, the first hot plug signal detection end 1161 is connected to the hot plug signal transmission line 1321, the second hot plug signal detection end 1261 is connected to the hot plug signal transmission line 1321, and the first hot plug signal detection end 1161 and the second hot plug signal detection end 1261 respectively detect hot plug signals.
In combination with the above embodiments, after the first controller 116 detects the hot plug signal of the high level, the first controller 116 detects the operation states of the first driver 111 and the second driver 113, respectively, generates the first control signal when detecting that the first driver 111 or the second driver 113 is operated, and transmits the first control signal to the first switch chip 115, and the first switch chip 115 communicates with the first driver 111 or the second driver 113 that is operated based on the first control signal. Similarly, after the second controller 126 detects the hot plug signal of the high level, the second controller 126 detects the operating states of the third driver 121 and the fourth driver 123, respectively, generates a second control signal when detecting that the third driver 121 or the fourth driver 123 is operated, and transmits the second control signal to the second switch chip 125, and the second switch chip 125 communicates with the third driver 121 or the fourth driver 123 being operated based on the second control signal.
It should be understood that the first driver 111, the second driver 113, the third driver 121, and the fourth driver 123 each have a normal operation state and an abnormal operation state, and the above detection is that the operation is detected as the normal operation state. When the driver is in a normal working state, the differential signal is indicated to realize signal transmission through the driver. The driver is in a normal working state, namely the driver can receive normal high-speed video electric signals, and the switch chip is not communicated with the driver. In some application scenarios, the driver receives a normal high-speed video electrical signal at its input electrical port, i.e. the driver is in a normal operating state at this time.
Referring to fig. 4, the first controller 116 is connected to the status output pins of the first driver 111 and the second driver 113, and the second controller 126 is connected to the status output pins of the third driver 121 and the fourth driver 123. When the first driver 111 or the second driver 113 is operated, the first controller 116 detects that the state output pin of the operated first driver 111 or second driver 113 is at a low level, and when the third driver 121 or the fourth driver 123 is operated, the second controller 126 detects that the state output pin of the operated third driver 121 or fourth driver 123 is at a low level. The first controller 116 may be provided with detection terminals connected to the status output pins of the first driver 111 and the second driver 113, respectively, or may be connected to the status output pins of the first driver 111 and the second driver 113 through the same detection terminal. Accordingly, the second controller 126 is also the same.
It should be understood that when the first driver 111, the second driver 113, the third driver 121 and the fourth driver 123 are in a normal operation state, they normally receive the differential signal, and the level of the state output pin is changed from the high level to the low level. Only when the switch chip is in communication with the correct driver will the driver normally receive the differential signal. The first controller 116 and the second controller 126 detect the level state of the state output pin at a preset frequency to obtain the working state of the driver in real time.
With further reference to fig. 4, the first controller 116 includes a first control port 1162 connected to the first switch chip 115, and the second controller 126 includes a second control port 1262 connected to the second switch chip 125. In combination with the above, the first control port 1162 is a control signal transmitting end, so as to implement transmission of the first control signal, and the first switch chip 115 is correspondingly provided with the first control signal receiving end 1151, so as to implement reception of the first control signal. The second control port 1262 is a control signal transmitting end, so as to realize the transmission of a second control signal, and the second switch chip 125 is correspondingly provided with a second control signal receiving end 1251, so as to realize the reception of the second control signal.
Specifically, the first controller 116 causes the first switching chip 115 to communicate with the first driver 111 by setting the first control port 1162 to a high level, and the first controller 116 causes the first switching chip 115 to communicate with the second driver 113 by setting the first control port 1162 to a low level. In combination with the above, the high level and the low level of the first control port 1162 are the first control signals. Likewise, the second controller 126 communicates the second switching chip 125 with the third driver 121 by setting the second control port 1262 to a high level, and the second controller 126 communicates the second switching chip 125 with the fourth driver 123 by setting the second control port 1262 to a low level.
Specifically, in combination with the above, after the first controller 116 and the second controller 126 detect that the hot plug signal is a high level signal, the first controller 116 causes the first switch chip 115 to communicate with the first driver 111 by setting the first control port 1162 to a high level, and the second controller 126 causes the second switch chip 125 to communicate with the third driver 121 by setting the second control port 1262 to a high level. Thus, in an initial state where the cable 13 is connected to the playback-side apparatus and the display-side apparatus, the first switch chip 115 and the second switch chip 125 in the first plug 11 are both in communication with the same type of DRIVER.
It should be appreciated that in combination with the above, after the initial state, the first controller 116 further detects the operation states of the first driver 111 and the second driver 113, and further selects whether to switch the driver communication according to the operation states.
For example, in the initial state, the first switch chip 115 is connected to the first driver 111, and the first controller 116 further detects the operating states of the first driver 111 and the second driver 113. When the first driver 111 is in a normal operation state, the first switch chip 115 should be connected to the first driver 111, and at this time, the first controller 116 will not switch the connection between the first switch chip 115 and the second driver 113, but keep the connection between the first switch chip 115 and the first driver 111. When the first driver 111 is not in the normal operation state, the first controller 116 controls the first switch chip 115 to communicate with the second driver 113 when the second driver 113 is in the normal operation state.
Further, in some specific embodiments, after the first controller 116 and the second controller 126 detect that the hot plug signal is a high level signal, the first controller 116 and the second controller 126 continue to detect the hot plug signal at a preset frequency, and after detecting the hot plug signal at a high level again, connect the first switch chip 115 to the first driver 111, and connect the second switch chip 125 to the third driver 121.
It should be understood that after the first plug 11 and the second plug 12 connect the playback end device and the display end device, the first plug 11 and/or the second plug 12 may be disconnected from the playback end device or the display end device due to an artificial error operation, and the hot plug signal will be changed to a low level signal. If the playback-side device and the display-side device are reconnected to the first plug 11 and the second plug 12, the first controller 116 and the second controller 126 will re-detect the high-level hot plug signal.
Further, after the first controller 116 and the second controller 126 detect the high-level hot plug signal again, the first controller 116 will enable the first switch chip 115 to be connected to the first driver 111, and subsequently detect the working states of the first driver 111 and the second driver 113, and implement the communication between the first switch chip 115 and the first driver 111 or the second driver 113 based on the working states. Accordingly, the second controller 126 will enable the second switch chip 125 to be connected to the third driver 121, and subsequently detect the working states of the third driver 121 and the fourth driver 123, and implement the communication between the second switch chip 125 and the third driver 121 or the fourth driver 123 based on the working states.
A second aspect of the present application provides a signal transmission method, which may be based on the HDMI cable assembly 10 provided in any of the above embodiments. Referring to fig. 5, fig. 5 is a flowchart of an embodiment of a signal transmission method provided in the present application. As shown in fig. 5, the method comprises the steps of:
s11: one of the first plug and the second plug is inserted into the playing end device, and the other of the first plug and the second plug is inserted into the display end device.
In this step, the first plug may be inserted into any one of the play end device and the display end device, and the second plug may be inserted into any one of the play end device and the display end device, accordingly, so as to implement blind insertion of the first plug and the second plug.
S12: the first driver or the second driver is communicated through the first switch chip, and the third driver or the fourth driver is communicated through the second switch chip.
The first switch chip realizes gating between the first driver and the second driver, and the second switch chip realizes gating between the third driver and the fourth driver. Therefore, when the first plug is inserted into the playing end device, the first switch chip can be communicated with the first driver matched with the playing end device, and when the first plug is inserted into the display end device, the first switch chip can be communicated with the second driver matched with the display end device. Correspondingly, the same is true for the second switch chip in the second plug to realize gating between the third driver and the fourth driver.
In this step, after the first plug and the second plug are blind-plugged, the driver in the first plug and the second plug can be properly selected, so that signals can be transmitted from the playing end device to the display end device.
S13: and transmitting the differential signal of the playing end device to the display end device based on the combination of the communicated first driver and the fourth driver or the combination of the second driver and the third driver.
It should be appreciated that after the first plug is connected to the playback-side device and the second plug is connected to the display-side device, the HDMI cable assembly will transmit a signal through the first driver of the first plug to the fourth driver of the second plug. After the first plug is connected to the display-side device and the second plug is connected to the playback-side device, the HDMI cable assembly transmits a signal to the second driver of the first plug via the third driver of the second plug.
Further, in some embodiments, step S12 may include: and the communication between the first switch chip and the first driver or the second driver is switched based on the working state signals of the first driver and the second driver, and the communication between the second switch chip and the third driver or the fourth driver is switched based on the working state signals of the third driver and the fourth driver.
In combination with the foregoing embodiments, the working state signals of the first driver and the second driver include signals that the first driver and the second driver are in a normal working state and signals that the first driver and the second driver are in an abnormal working state. In combination with the above embodiments, the signal in the normal working state and the signal in the abnormal working state may be level signals of the driver state output pins, so that the level signals implement switching between the communication between the first switch chip and the first driver or the second driver.
Accordingly, the switching between the communication between the second switch chip and the third driver or the fourth driver may be referred to the description of the switching between the communication between the first switch chip and the first driver or the second driver.
In summary, in the above embodiments, the HDMI cable assembly 10 and the corresponding signal transmission method provided in the present application can implement blind insertion of the first plug and the second plug, and improve user experience.
The foregoing is only the embodiments of the present application, and not the patent scope of the present application is limited by the foregoing description, but all equivalent structures or equivalent processes using the contents of the present application and the accompanying drawings, or directly or indirectly applied to other related technical fields, which are included in the patent protection scope of the present application.
Claims (8)
1. An HDMI cable assembly, comprising:
a cable;
the first plug is arranged at one end of the cable and comprises a first driver, a second driver, a first light emitting unit, a first light receiving unit and a first switch chip, wherein the first driver is connected with the first light emitting unit, the second driver is connected with the first light receiving unit, the first driver is used for transmitting differential signals to the first light emitting unit, the second driver is used for receiving the differential signals from the first light receiving unit, the first switch chip is respectively connected with the first driver and the second driver, and the first switch chip can be switched between communication with the first driver or the second driver;
the second plug is arranged at the other end of the cable and comprises a third driver, a fourth driver, a second light emitting unit, a second light receiving unit and a second switch chip, wherein the third driver is connected with the second light emitting unit, the fourth driver is connected with the second light receiving unit, the third driver is used for transmitting differential signals to the second light emitting unit, the fourth driver is used for receiving the differential signals from the second light receiving unit, the second switch chip is respectively connected with the third driver and the fourth driver, and the second switch chip can be switched between communication with the third driver or the fourth driver;
the first plug and the second plug realize signal transmission through the combination of the first driver and the fourth driver or the combination of the second driver and the third driver;
the first plug comprises a first controller, the first controller is connected with the first driver, the second driver and the first switch chip, the second plug comprises a second controller, and the second controller is connected with the third driver, the fourth driver and the second switch chip;
the cable comprises a hot plug signal transmission line, when the first plug is inserted into one of the playing end and the display end, the second plug is inserted into the other of the playing end and the display end, and the display end transmits the hot plug signal to the playing end through the hot plug signal transmission line;
in an initial state, after the first controller detects that the hot plug signal is a high level signal, the first switch chip is communicated with the first DRIVER, and after the second controller detects that the hot plug signal is a high level signal, the second switch chip is communicated with the third DRIVER, and the first switch chip and the second switch chip are communicated with the same type of DRIVER;
after the initial state, the first controller is used for switching between the first switch chip and the first driver or the second driver according to the working state signals of the first driver and the second driver, and the second controller is used for switching between the second switch chip and the third driver or the fourth driver according to the state signals of the third driver and the fourth driver.
2. The HDMI cable assembly of claim 1, wherein,
the first controller is provided with a first hot plug signal detection end, the second controller is provided with a second hot plug signal detection end, the first hot plug signal detection end is connected with the hot plug signal transmission line, the second hot plug signal detection end is connected with the hot plug signal transmission line, and the first hot plug signal detection end and the second hot plug signal detection end respectively detect the hot plug signal.
3. The HDMI cable assembly of claim 1, wherein,
after the first controller detects the high-level hot plug signal, the first controller respectively detects the working states of the first driver and the second driver, generates a first control signal when detecting that the first driver or the second driver works, and sends the first control signal to the first switch chip, and the first switch chip is communicated with the working first driver or the working second driver based on the first control signal;
after the second controller detects the high-level hot plug signal, the second controller detects the working states of the third driver and the fourth driver respectively, generates a second control signal when detecting the third driver or the fourth driver to work, and sends the second control signal to the second switch chip, and the second switch chip is communicated with the third driver or the fourth driver which is working based on the second control signal.
4. The HDMI cable assembly of claim 3, wherein,
the first controller is respectively connected with the state output pins of the first driver and the second driver, and the second controller is respectively connected with the state output pins of the third driver and the fourth driver;
when the first driver or the second driver works, the first controller detects that the working state output pin of the first driver or the second driver is in a low level, and when the third driver or the fourth driver works, the second controller detects that the working state output pin of the third driver or the fourth driver is in a low level.
5. The HDMI cable assembly of claim 4, wherein,
the first controller comprises a first control port connected with the first switch chip, and the second controller comprises a second control port connected with the second switch chip;
wherein the first controller causes the first switch chip to communicate with the first driver by setting the first control port to a high level, the first controller causes the first switch chip to communicate with the second driver by setting the first control port to a low level, the second controller causes the second switch chip to communicate with the third driver by setting the second control port to a high level, and the second controller causes the second switch chip to communicate with the fourth driver by setting the second control port to a low level.
6. The HDMI cable assembly of claim 1, wherein,
after the first controller and the second controller detect that the hot plug signal is a high level signal, the first controller and the second controller continue to detect the hot plug signal at a preset frequency, and after the hot plug signal with a high level is detected again, the first switch chip is connected with the first driver, and the second switch chip is connected with the third driver.
7. A signal transmission method, characterized in that the signal transmission method is based on the HDMI cable assembly of any one of the preceding claims 1-5, the method comprising:
inserting one of the first plug and the second plug into play end equipment, and inserting the other of the first plug and the second plug into display end equipment;
the first switch chip is communicated with the first driver or the second driver, and the second switch chip is communicated with the third driver or the fourth driver;
and transmitting the differential signal of the playing end device to the display end device based on the combination of the first driver and the fourth driver or the combination of the second driver and the third driver after being communicated.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
the step of communicating to the first driver or the second driver through the first switch chip and communicating to the third driver or the fourth driver through the second switch chip includes:
and switching between the first switch chip and the first driver or the second driver is realized based on the working state signals of the first driver and the second driver, and switching between the second switch chip and the third driver or the fourth driver is realized based on the working state signals of the third driver and the fourth driver.
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| CN103259999B (en) * | 2012-02-20 | 2016-06-15 | 联发科技（新加坡）私人有限公司 | HPD signal output control method, HDMI receiving device and system |
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| CN104103924A (en) * | 2013-04-02 | 2014-10-15 | 华为终端有限公司 | High definition multimedia interface hdmi interface unit and multimedia terminal |
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