CN114597706A - HDMI cable assembly and signal transmission method - Google Patents

HDMI cable assembly and signal transmission method Download PDF

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Publication number
CN114597706A
CN114597706A CN202210262304.XA CN202210262304A CN114597706A CN 114597706 A CN114597706 A CN 114597706A CN 202210262304 A CN202210262304 A CN 202210262304A CN 114597706 A CN114597706 A CN 114597706A
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China
Prior art keywords
driver
switch chip
controller
signal
plug
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Granted
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CN202210262304.XA
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Chinese (zh)
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CN114597706B (en
Inventor
蒋军
许引库
周建
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Shenzhen New Liansheng Photoelectric Technology Co ltd
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Shenzhen New Liansheng Photoelectric Technology Co ltd
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Priority to CN202210262304.XA priority Critical patent/CN114597706B/en
Publication of CN114597706A publication Critical patent/CN114597706A/en
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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
    • 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
    • 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
    • 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
    • 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 comprises: 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 receiving unit, and a first switch 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 receiving unit, and a second switch chip capable of switching between communication with the third driver or the fourth driver. Therefore, the blind-mating of the first plug and the second plug can be realized based on the communication selection function of the switch chip.

Description

HDMI cable assembly and signal transmission method
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
A High Definition Multimedia Interface (HDMI) is a fully digital video/audio transmission Interface. After long-term development and popularization, various electronic devices such as PCs, displays, projectors, set-top boxes, game machines, and the like now support HDMI interfaces, and with this, the HDMI cable industry has emerged as a data transmission between playback devices and display devices.
The traditional HDMI cable is limited by signal loss and cost, and cannot meet the requirement of long-distance transmission, and the development of the optical communication technology and the application in the HDMI industry enable the appearance of an HDMI photoelectric hybrid cable on the market, so that long-distance and low-cost data transmission can be met. However, compared with cable transmission, optical fiber transmission can only transmit signals in one direction, and cannot be used for bidirectional signal transmission. Therefore, the HDMI optical/electrical hybrid cable generally needs 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 optical-electrical hybrid cable cannot unconditionally support blind plugging without distinguishing the Source end and the Sink end, resulting in poor user experience.
Disclosure of Invention
The application provides an HDMI cable assembly and a signal transmission method, when the HDMI cable assembly is connected with a playing end device and a display end device, blind plugging of a first plug and a second plug can be achieved based on selection between communication of a switch chip and a light emitting unit or a light receiving unit, and user experience is further improved.
The present application provides in a first aspect 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 the 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 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, the first controller is connected with the first driver, the second driver and the first switch chip, the second plug includes a second controller, the second controller is connected with the third driver, the fourth driver and the second switch chip; the first controller is used for realizing switching between communication of the first switch chip and the first driver or the second driver according to working state signals of the first driver and the second driver, and the second controller is used for realizing switching between communication of the second switch chip and the third driver or the fourth driver according to state signals of the third driver and the fourth driver.
In some specific embodiments, the cable includes a hot plug signal transmission line, 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 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 detection end and the second hot plug detection end respectively detect a hot plug signal.
In some specific embodiments, after the first controller detects a high-level hot plug signal, the first controller detects operating 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 is operating, and sends the first control signal to the first switch chip, and the first switch chip is communicated with the operating first driver or the operating 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 that the third driver or the fourth driver works, 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 status output pins of the first driver and the second driver, respectively, and the second controller is connected to 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 the working 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 the working 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; the first controller enables the first switch chip to be communicated with the first driver by setting the first control port to be at a high level, the first controller enables the first switch chip to be communicated with the second driver by setting the first control port to be at a low level, the second controller enables the second switch chip to be communicated with the third driver by setting the second control port to be at a high level, and the second controller enables the second switch chip to be communicated with the fourth driver by setting the second control port to be at a low level.
In some specific embodiments, 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 high-level hot plug signal is detected again, the first switch chip is connected to the first driver, so that the second switch chip is connected to 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 including: inserting one of the first plug and the second plug into the playing end equipment, and inserting the other of the first plug and the second plug into the 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 connected first driver and fourth driver or the combination of the second driver and the third driver.
In some embodiments, the step of communicating through the first switch chip to the first driver or the second driver and through the second switch chip to the third driver or the fourth driver comprises: and switching between the communication of 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 communication of the second switch chip and the third driver or the fourth driver is realized based on the state signals of the third driver and the fourth driver.
The application has at least the following beneficial effects: compared with the prior art, the HDMI cable assembly and the signal transmission method provided by the application can realize blind plugging of the first plug and the second plug based on selection between the communication of 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, and further improve user experience.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
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 another embodiment of an HDMI cable assembly provided herein;
fig. 4 is a schematic structural diagram of another embodiment of an HDMI cable assembly provided herein;
fig. 5 is a flowchart illustrating a signal transmission method according to an embodiment of the present disclosure.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise 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.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an embodiment of an HDMI cable assembly provided in the present application, and fig. 2 is a schematic structural diagram of another embodiment of an 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 playback 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 playback end device and the display end device. The playing end device can be a device with a playing function, such as a computer, a game machine and a set-top box, the display end device can be a device with a display function, such as a display and a projector, and the playing end device enables the display end device to display based on 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 switch 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 configured to transmit a differential signal to the first light emitting unit 112, and the second driver 113 is configured to receive the differential signal from the first light receiving unit 114. The first switch chip 115 is connected to the first driver 111 and the second driver 113, respectively, and the first switch chip 115 can switch communication with the first driver 111 or the second driver 113.
It is to 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 implements 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 implement driving of the first light receiving unit 114 to convert the optical signal into an electrical signal. The differential signals are high-speed differential signals, can be high-speed audio/video signals, and can be specifically divided into four groups, namely TMDS2+/-, TMDS1+/-, TMDS0+/-, and CLK +/-.
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 switch 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 used to transmit a differential signal to the second light emitting unit 122, and the fourth driver 123 is used to receive a 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 can switch 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 is understood 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 broadcasting-side device and the display-side device perform data transmission through the HDMI cable assembly 10, the broadcasting-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 then transmits data to the display-side device through the fourth driver 123. Alternatively, the playing 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 then 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 the HDMI cable assembly 10 provided in the present application.
As shown in fig. 3, in some embodiments, 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 switch chip 125.
The first controller 116 is configured to switch between communications of the first switch chip 115 and the first driver 111 or the second driver 113 according to the operating state signals of the first driver 111 and the second driver 113, and the second controller 126 is configured to switch between communications of the second switch chip 125 and 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 understood that the first controller 116 implements the switching of the driver connection by the operating status signal of the driver, and thus implements the selection of the driver so as to normally perform the 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 the HDMI cable assembly 10 provided in the present application.
In some embodiments, as shown in fig. 4, 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. 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 playback end device and the display end device, the second plug 12 is inserted into the other of the playback end device and the display end device, and the display end device sends a hot plug signal to the playback 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, wherein the ground line 1322 is connected to the first plug 11 and the second plug 12 to realize grounding of the plugs; the cable 1323 is used for transmitting electric energy from the playing-end device to the display-end device to charge 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 to transmit an ARC signal (audio return channel signal) of the playback-end device to the display-end device, the second sub-transmission line 1325 is used to implement mutual transmission of an SDA signal (data signal) between the playback-end device and the display-end device, the third sub-transmission line 1326 is used to implement transmission of an SCL signal (clock signal) from the playback-end device to the display-end device, and the fourth sub-transmission line 1327 is used to implement mutual transmission of a CEC signal (protocol signal) between the playback-end device and the display-end device.
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 a 2. In conjunction with the above, the display end device transmits the hot plug signal to the first interface a1 of the playback end device through the hot plug signal transmission line 1321 through the second interface a 2.
Specifically, after the playing 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 playing end device. In combination with the connection manner of the cable 13 in fig. 4, at this time, after detecting that the hot plug signal is a high level signal, the first controller 116 makes the first switch chip 115 communicate with the first driver 111, and after detecting that the hot plug signal is a high level signal, the second controller 126 makes the second switch chip 125 communicate with the third driver 121. Of course, in other embodiments, the second plug 12 may be inserted into the playing-side device, and the first plug 11 may be inserted into the display-side 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 playback 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 detecting terminal 1161, the second controller 126 is provided with a second hot plug signal detecting terminal 1261, the first hot plug signal detecting terminal 1161 is connected to the hot plug signal transmission line 1321, the second hot plug signal detecting terminal 1261 is connected to the hot plug signal transmission line 1321, and the first hot plug signal detecting terminal 1161 and the second hot plug signal detecting terminal 1261 detect hot plug signals respectively.
With reference to the above embodiment, after the first controller 116 detects the high level hot plug signal, the first controller 116 detects the operating states of the first driver 111 and the second driver 113, respectively, generates a first control signal when detecting that the first driver 111 or the second driver 113 is operating, and sends the first control signal to the first switch chip 115, and the first switch chip 115 communicates with the operating first driver 111 or the operating second driver 113 based on the first control signal. Similarly, after the second controller 126 detects the high-level hot plug signal, 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 that is operating 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 all have a normal operation state and an abnormal operation state, and the detection of the operation is performed as the detection of the normal operation state. When the driver is in a normal working state, the differential signal can realize the transmission of the signal through the driver. The driver can be in a normal working state that the driver can receive a normal high-speed video electrical signal, and the switch chip can not be communicated with the driver at the moment. In some application scenarios, the driver receives a normal high-speed video electrical signal on its input electrical port, i.e., the driver is in a normal operating state.
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, respectively, and the second controller 126 is connected to the status output pins of the third driver 121 and the fourth driver 123, respectively. When the first driver 111 or the second driver 113 operates, the first controller 116 detects that the status output pin of the operating first driver 111 or the operating second driver 113 is at a low level, and when the third driver 121 or the fourth driver 123 operates, the second controller 126 detects that the status output pin of the operating third driver 121 or the operating fourth driver 123 is at a low level. The first controller 116 may be provided with a detection terminal connected to the status output pins of the first driver 111 and the second driver 113, 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, so does the second controller 126.
It should be understood that the first driver 111, the second driver 113, the third driver 121, and the fourth driver 123 receive the differential signals normally when they are in a normal operating state, and the level of the state output pin changes from a high level to a low level. The driver will normally receive the differential signal only when the switch chip is connected to the correct driver. The first controller 116 and the second controller 126 detect the level status of the status output pin at a predetermined frequency to obtain the operating status of the driver in real time.
Referring further 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 terminal to transmit the first control signal, and the first switch chip 115 is correspondingly provided with a first control signal receiving terminal 1151 to receive the first control signal. The second control port 1262 is a control signal transmitting terminal to transmit a second control signal, and the second switch chip 125 is correspondingly provided with a second control signal receiving terminal 1251 to receive the second control signal.
Specifically, the first controller 116 makes the first switch chip 115 communicate with the first driver 111 by setting the first control port 1162 to a high level, and the first controller 116 makes the first switch chip 115 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 signal. Likewise, the second controller 126 makes the second switch chip 125 communicate with the third driver 121 by setting the second control port 1262 to a high level, and the second controller 126 makes the second switch chip 125 communicate 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 makes the first switch chip 115 communicate with the first driver 111 by setting the first control port 1162 to a high level, and the second controller 126 makes the second switch chip 125 communicate with the third driver 121 by setting the second control port 1262 to a high level. Therefore, in an initial state where the cable 13 is connected to the playback-side device and the display-side device, both the first switch chip 115 and the second switch chip 125 in the first plug 11 communicate with the same type of DRIVER.
It should be understood that, in conjunction with the above, after the initial state, the first controller 116 further detects the operating states of the first driver 111 and the second driver 113, and then selects whether to switch the driver connection or not according to the operating 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 operating state, the first switch chip 115 should be connected to the first driver 111, and the first controller 116 does not switch the connection between the first switch chip 115 and the second driver 113, but maintains the connection between the first switch chip 115 and the first driver 111. When the first driver 111 is not in a normal operating state and the second driver 113 is in a normal operating state, the first controller 116 controls the first switch chip 115 to communicate with the second driver 113.
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 high-level hot plug signal again, the first switch chip 115 is connected to the first driver 111, so that the second switch chip 125 is connected 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 human error operation, and the hot plug signal will be changed to a low-level signal. If the first plug 11 and the second plug 12 reconnect the playback device and the display device, the first controller 116 and the second controller 126 will detect the hot plug signal with high level again.
Further, after the first controller 116 and the second controller 126 detect the hot plug signal with the high level again, the first controller 116 will connect the first switch chip 115 to the first driver 111 and subsequently detect the operating states of the first driver 111 and the second driver 113, and based on the operating states, the first switch chip 115 and the first driver 111 or the second driver 113 are connected. Accordingly, the second controller 126 will connect the second switch chip 125 to the third driver 121 and subsequently detect the operating states of the third driver 121 and the fourth driver 123, and communication between the second switch chip 125 and the third driver 121 or the fourth driver 123 is achieved based on the operating 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 one of the above embodiments. Referring to fig. 5, fig. 5 is a schematic flowchart illustrating a signal transmission method according to an embodiment of the present disclosure. As shown in fig. 5, the method includes the following steps:
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 playback end device and the display end device, and the second plug may be correspondingly inserted into any one of the playback end device and the display end device, thereby realizing blind insertion of the first plug and the second plug.
S12: 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.
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 adapted to 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 adapted to the display-end device. Accordingly, the same is true for the second switch chip in the second plug to enable gating between the third driver and the fourth driver.
In this step, after the first plug and the second plug are blindly plugged, the drivers in the first plug and the second plug can be correctly selected, so that the signal can be transmitted from the playing terminal device to the display terminal device.
S13: and transmitting the differential signal of the playing end device to the display end device based on the combination of the connected first driver and 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 transmits 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 through the third driver of the second plug.
Further, in some embodiments, step S12 may include: and switching between the communication 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 communication 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.
In combination with the above embodiment, the operating state signals of the first driver and the second driver include a signal that the first driver and the second driver are in a normal operating state, and a signal that the first driver and the second driver are in an abnormal operating state. In combination with the content of the above embodiment, the signal in the normal operating state and the signal in the abnormal operating state may be level signals of the driver state output pin, and the level signals realize switching between communication between the first switch chip and the first driver or the second driver.
Accordingly, switching between connectivity of the second switch chip with the third driver or the fourth driver may refer to the description of switching between connectivity of the first switch chip with the first driver or the second driver.
By combining the content of the above embodiments, the HDMI cable assembly 10 and the corresponding signal transmission method provided by the present application can implement blind mating of the first plug and the second plug, thereby improving user experience.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims (10)

1. An HDMI cable assembly, the 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, 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;
a second plug disposed at the other end of the cable, the second plug including a third driver, a fourth driver, a second light emitting unit, a second light receiving unit, and a second switch chip, the third driver being connected to the second light emitting unit, the fourth driver being connected to the second light receiving unit, the third driver being configured to transmit a differential signal to the second light emitting unit, the fourth driver being configured to receive a differential signal from the second light receiving unit, the second switch chip being connected to the third driver and the fourth driver, respectively, the second switch chip being capable of switching between communication with the third driver or the fourth driver;
wherein the first plug and the second plug realize signal transmission through a combination of the first driver and the fourth driver or a combination of the second driver and the third driver.
2. The HDMI cable assembly of claim 1,
the first plug comprises a first controller connected with the first driver, the second driver and the first switch chip, and the second plug comprises a second controller connected with the third driver, the fourth driver and the second switch chip;
the first controller is used for realizing 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 realizing 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.
3. The HDMI cable assembly of claim 2,
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;
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.
4. The HDMI cable assembly of claim 3,
the first controller is provided with first hot plug signal detection end, the second controller is provided with second hot plug signal detection end, first hot plug signal detection end with hot plug signal transmission line connects, second hot plug signal detection end with hot plug signal transmission line connects, first hot plug signal detection end with second hot plug signal detection end is right respectively hot plug signal detects.
5. The HDMI cable assembly of claim 3,
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 first driver or the second driver which works based on the first control signal;
after the second controller detects the high-level hot plug signal, the second controller detects the operating states of the third driver and the fourth driver, respectively, generates a second control signal when detecting that the third driver or the fourth driver is operating, and sends the second control signal to the second switch chip, and the second switch chip is communicated with the operating third driver or the operating fourth driver based on the second control signal.
6. The HDMI cable assembly of claim 5,
the first controller is respectively connected with state output pins of the first driver and the second driver, and the second controller is respectively connected with 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 a state output pin of the working first driver or the working second driver is at a low level, and when the third driver or the fourth driver works, the second controller detects that a state output pin of the working third driver or the working fourth driver is at a low level.
7. The HDMI cable assembly of claim 6,
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 makes the first switch chip communicate with the first driver by setting the first control port to a high level, the first controller makes the first switch chip communicate with the second driver by setting the first control port to a low level, the second controller makes the second switch chip communicate with the third driver by setting the second control port to a high level, and the second controller makes the second switch chip communicate with the fourth driver by setting the second control port to a low level.
8. The HDMI cable assembly of claim 3,
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 at the high level is detected again, the first switch chip is connected with the first driver, so that the second switch chip is connected with the third driver.
9. A signal transmission method based on the HDMI cable assembly of any of claims 1-8, the method comprising:
inserting one of the first plug and the second plug into a playing end device, and inserting the other of the first plug and the second plug into a display end device;
communicating through the first switch chip to the first driver or the second driver and communicating through the second switch chip to 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 the communication.
10. The method of claim 9,
the step of communicating with the first driver or the second driver through the first switch chip and communicating with the third driver or the fourth driver through the second switch chip includes:
switching between communication of a first switch chip and the first driver or the second driver is achieved based on the first driver and the second driver working state signal, and switching between communication of the second switch chip and the third driver or the fourth driver is achieved based on the third driver and the fourth driver working state signal.
CN202210262304.XA 2022-03-16 2022-03-16 HDMI cable assembly and signal transmission method Active CN114597706B (en)

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CN208656773U (en) * 2018-08-14 2019-03-26 海能电子(深圳)有限公司 High-definition multimedia interface fiber transmission device
CN216391268U (en) * 2021-11-02 2022-04-26 深圳新联胜光电科技有限公司 HDMI2.1 all-optical photoelectric conversion communication device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130219087A1 (en) * 2012-02-20 2013-08-22 Mediatek Singapore Pte. Ltd. High-definition multimedia interface (hdmi) receiver apparatuses, hdmi systems using the same, and control methods therefor
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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