CN211656158U - Signal conversion circuit and signal patch cord - Google Patents
Signal conversion circuit and signal patch cord Download PDFInfo
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- CN211656158U CN211656158U CN202020618472.4U CN202020618472U CN211656158U CN 211656158 U CN211656158 U CN 211656158U CN 202020618472 U CN202020618472 U CN 202020618472U CN 211656158 U CN211656158 U CN 211656158U
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Abstract
The utility model relates to a data line technical field, concretely relates to signal conversion circuit and signal patch cord, its mainly used HDMI signal interface's output signal converts the input signal who becomes with Type-C interface adaptation. The signal conversion circuit comprises a signal receiving module, a signal conversion module and a signal sending module, wherein the signal receiving module is used for receiving an HDMI signal sent by an HDMI signal interface and sending the HDMI signal to the signal conversion module, the signal conversion module is used for converting the HDMI signal into a Type-C signal and sending the signal to the signal sending module, the signal sending module is used for sending the Type-C signal to a Type-C interface, so that a signal output by the HDMI signal interface is converted into an input signal matched with the Type-C interface, and an output device provided with the HDMI signal interface can send the signal to a receiving device with the Type-C interface through the signal conversion circuit or a patch cord.
Description
Technical Field
The utility model relates to a data line technical field, concretely relates to signal conversion circuit and signal patch cord.
Background
For example, the existing computer host basically has an HDMI output port, and some displays are also provided with an HDMI input port, so that the host can be directly connected with the displays through the HDMI cable. However, for a device whose signal source only has an HDMI output port, and a display device only has an USB Type-C input port, in order to view the image content displayed by the HDMI signal source, a patch cord from HDMI to USB Type-C is required to convert the TMDS signal sent by the HDMI signal source into a DP signal, and then transmit the DP signal to a display having a USB Type-C interface. The existing products on the market are wires with USB Type-C to HDMI interfaces, and the wires have the function of converting video signals with USB Type-C interface equipment into signals of HDMI types and then transmitting the signals to equipment such as televisions, displays and projectors. If the interface of display only has Type-C mouth, then can't with the signal source lug connection who has the HDMI delivery outlet, consequently lack a wire rod that can convert the HDMI signal into Type-C signal in the market.
SUMMERY OF THE UTILITY MODEL
The utility model provides a signal conversion circuit and signal patch cord, its aim at converts the HDMI signal into Type-C signal for the output device who has the HDMI interface can give the receiving equipment who has the Type-C interface with signal transmission.
A signal conversion circuit for signal conversion between an HDMI interface and a Type-C interface, comprising: the device comprises a signal receiving module, a signal conversion module and a signal sending module;
the signal receiving module is used for receiving the HDMI signal output by the HDMI interface and sending the HDMI signal to the signal conversion module;
the signal conversion module is used for converting the HDMI signal into a Type-C signal and outputting the Type-C signal to the signal sending module;
the signal sending module is used for outputting the Type-C signal to the Type-C interface.
The signal conversion module comprises a decoding and decrypting module and a coding and encrypting module;
the decoding and decrypting module is used for decoding and decrypting the HDMI signals of the TMDS mechanism and sending the decoded and decrypted data to the encoding and encrypting module, and the encoding and encrypting module is used for encoding and encrypting the decoded and decrypted data to obtain the Type-C signals of the DP mechanism.
In an embodiment, the communication device further comprises a CC control module, and the CC control module is configured to establish a communication connection with a receiving device connected to the Type-C interface.
In an embodiment, the auxiliary signal control module is configured to communicate with a receiving device connected to a Type-C interface, acquire EDID-related information of the receiving device, and control resolution and rate of output of the Type-C signal according to the EDID-related information.
In one embodiment, the device further comprises a Type-C interface, an input end of the Type-C interface is connected with an output end of the signal sending module, and an output end of the Type-C interface is used for connecting with a receiving device;
the HDMI interface is characterized by further comprising an HDMI interface, wherein the input end of the HDMI interface is used for being connected with output equipment, and the output end of the HDMI interface is connected with the input end of the signal receiving module.
In one embodiment, the device further comprises a power module, an input end of the power module is connected with the Type-C interface, and an output end of the power module is connected with the signal receiving module, the signal conversion module, the signal sending module, the CC control module and the auxiliary signal control module.
In one embodiment, the power supply further comprises a voltage reduction circuit, wherein the voltage reduction circuit is arranged between the Type-C interface and the power supply module and used for reducing high voltage input by external equipment into multi-path low voltage and then supplying the multi-path low voltage to the power supply module.
In one embodiment, the USB interface is connected with the Type-C interface and used for connecting an output device, so that a USB port on the output device is in communication connection with the Type-C interface;
still include switching circuit, the Type-C interface pass through switching circuit with the step-down circuit is connected, the USB interface still with switching circuit connects, output device still passes through the USB interface to the switching circuit power supply, switching circuit is used for switching USB interface and/or Type-C interface with the step-down circuit switches on.
In one embodiment, the device further comprises a clock circuit, wherein the clock circuit is connected with the signal receiving module, the signal conversion module and the signal transmitting module and is used for providing a clock signal;
the voltage reduction circuit comprises a first voltage reduction circuit, a second voltage reduction circuit and a third voltage reduction circuit, and the first voltage reduction circuit, the second voltage reduction circuit and the third voltage reduction circuit are respectively used for reducing input voltage into voltage with different sizes and supplying the voltage to the power supply module.
A signal patch cord comprising a signal conversion circuit as described above.
According to the signal conversion circuit and the signal patch cord of the embodiment, the signal conversion circuit and the signal patch cord are mainly used for converting the output signal of the HDMI signal interface into the input signal matched with the Type-C interface. The signal conversion circuit comprises a signal receiving module, a signal conversion module and a signal sending module, wherein the signal receiving module is used for receiving an HDMI signal sent by an HDMI signal interface and sending the HDMI signal to the signal conversion module, the signal conversion module is used for converting the HDMI signal into a Type-C signal and sending the signal to the signal sending module, the signal sending module is used for sending the Type-C signal to a Type-C interface, so that a signal output by the HDMI signal interface is converted into an input signal matched with the Type-C interface, and an output device provided with the HDMI signal interface can send the signal to a receiving device with the Type-C interface through the signal conversion circuit and a patch cord.
Drawings
Fig. 1 is a schematic diagram of a signal conversion circuit according to an embodiment of the present application.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. It should be noted that, the Type-C interface and the HDMI interface described in the following embodiments of the present application do not consider the form of the male connector and the female connector, and in practical use, four types of conversion lines can be produced, for example, one Type is an HDMI male connector and a Type-C male connector, an HDMI male connector and a Type-C female connector, an HDMI female connector and a Type-C male connector, and a Type-C female connector.
The first embodiment is as follows:
referring to fig. 1, the present embodiment provides a signal conversion circuit, which is used for signal conversion between an HDMI interface and a Type-C interface, and converts an HDMI signal sent by an output device into a Type-C signal to be sent to a receiving device having the Type-C interface, so that the output device having the HDMI interface can transmit a signal to the receiving device having only the Type-C interface.
The signal conversion circuit of the present embodiment includes a signal receiving module 11, a signal conversion module, and a signal transmitting module 14. The signal receiving module is used for receiving an HDMI signal sent by the HDMI interface 2 and sending the HDMI signal to the signal conversion module, the signal conversion module is used for converting the HDMI signal into a Type-C signal and sending the Type-C signal to the signal sending module 14, and the signal sending module 14 is used for sending the Type-C signal to the Type-C interface so as to send the Type-C signal to a receiving device connected with the Type-C interface.
The signal conversion module comprises a decoding and decrypting module 12 and an encoding and encrypting module 13, the signal receiving module 11 receives the HDMI signal output by the HDMI interface and then sends the HDMI signal to the decoding and decrypting module 12, the decoding and decrypting module 12 is used for decoding and decrypting the HDMI signal and sending the decoded and decrypted data to the encoding and encrypting module 13, and the encoding and encrypting module 13 is used for encoding and encrypting the decoded and decrypted data according to a preset format to obtain a Type-C signal suitable for a Type-C interface. For example, the HDMI signal output by the HDMI interface 2 of the host is a signal of TMDS (transition modulation differential signaling) scheme, the converted Type-C signal is a signal of DP (display port (DP) is a digital video interface standard developed by the alliance of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA)), and after the Type-C signal is connected to the display, the converted signal of DP scheme can be directly displayed on the display.
The conversion circuit further comprises a CC control module 15, and the CC control module 15 is configured to establish a communication connection with a receiving device connected to the Type-C interface 3. When a receiving device (e.g., a display) is connected to the Type-C interface 3, the CC control module 15 establishes a communication connection with the receiving device, and the display provides a voltage of 5V to the switching circuit.
In an embodiment, the signal conversion circuit further includes an auxiliary signal control module 16, where the auxiliary signal control module 16 is configured to communicate with a receiving device connected to the Type-C interface 3, obtain EDID-related information of the receiving device, and generate an auxiliary signal according to the EDID-related information, where the auxiliary signal is used to control the resolution and the rate of the Type-C signal output. The auxiliary signal control module 16 is used to obtain some hardware information of the receiving device, such as EDID-related information, for example, the auxiliary signal control module 16 obtains the supported resolution and signal transmission rate of the display, and then generates a control signal, which is sent to the signal conversion module and signal sending module 14 to control the resolution and rate of the Type-C signal output adapted to the receiving device.
In one embodiment, the signal conversion circuit further includes a Type-C interface 3 and an HDMI interface 2, where an input terminal of the Type-C interface 3 is connected to an output terminal of the signal transmission module 14, and an output terminal thereof is used for connecting a receiving device (e.g., a display); the HDMI interface 2 has an input terminal for connecting an output device (e.g., a host), and an output terminal connected to an input terminal of the signal receiving module 11. Therefore, the output device and the receiving device are respectively connected through the HDMI interface 2 and the Type-C interface 3, and the HDMI signal output by the output device is converted into a Type-C signal adaptive to the Type-C interface 3, so that communication connection is established between the output device and the receiving device.
The signal conversion circuit of this embodiment further includes a power module 17, an input end of the power module 17 is connected to the Type-C interface 3, and an output end of the power module 17 is connected to the signal receiving module 11, the decoding and decrypting module 12, the encoding and encrypting module 13, the signal sending module 14, the CC control module 15, and the auxiliary signal control module 16. After the CC control module 15 establishes communication connection with the receiving device, the communication device may output a supply voltage 5V through the switching circuit module 5, and then the supply voltage is supplied to the voltage reduction circuit 4, and finally the supply voltage is supplied to the power supply module 17, and the power supply module 17 supplies power to each module, so that each module may work normally.
In an embodiment, the signal conversion circuit further includes a voltage reduction circuit 4, the voltage reduction circuit 4 is disposed between the Type-C interface 3 and the power module 17, the voltage reduction circuit 4 is configured to reduce a high voltage input by the external device to a multi-path low voltage and then supply the multi-path low voltage to the power module 17, and then the power module 17 supplies power to each module according to a voltage requirement of each module.
Specifically, the voltage-reducing circuit 4 of the present embodiment includes a first voltage-reducing module 41, a second voltage-reducing module 42, and a third voltage-reducing module 43, which are respectively used for reducing the input voltage to different divided voltages to be supplied to the power supply module 17.
In one embodiment, the signal conversion circuit further comprises a USB interface 6, the USB interface 6 is communicatively connected to the Type-C interface 3, and the USB interface 6 is used to connect an output device, so that the USB interface on the output device is communicatively connected to the Type-C interface 3 on the receiving device. For example, the USB interface is connected to a USB interface on a host, and when the Type-C interface 3 of the conversion circuit of this embodiment is connected to a display, it is equivalent to indirectly guiding a USB interface on the host to a USB port on the display, so that a user can directly connect other devices with USB interfaces, such as a keyboard and a mouse, to the USB port on the display, which is equivalent to directly connecting to the host. The situation can be applied to the situation that the distance between the host and the keyboard and the mouse is far, so that the connecting line between the mouse and the keyboard is not long enough, and the host can be controlled by connecting the mouse or the keyboard with the USB interface on the display.
In one embodiment, the signal conversion circuit further includes a switching circuit 5, the Type-C interface 3 is connected to the voltage reduction circuit 4 through the switching circuit 5, the USB interface 6 is also connected to the switching circuit 5, and the output device further supplies power to the switching circuit 5 through the USB interface 6, so as to supply power to each module in the circuit.
In the first case: when the Type-C interface 3 is connected with the receiving equipment and the USB interface 6 is not connected with the output equipment, the switching circuit controls the Type-C interface 3 to be conducted with the voltage reduction circuit 4 to supply power to the whole circuit;
in the second case: after Type-C interface 3 connects the receiving arrangement, when USB interface 6 still was connected with output device simultaneously, then switching circuit control USB interface 6 step-down circuit 4 switched on, control Type-C interface 3 and step-down circuit 4 disconnection.
In this embodiment, the signal conversion circuit further includes a clock circuit 7, the clock circuit 7 is connected to the signal receiving module 11, the signal conversion module, and the signal transmitting module 14, and is configured to provide a stable clock signal, and when an HDMI signal is provided to the signal receiving module 11, all modules are controlled to operate, and the HDMI signal is converted into a Type-C signal.
Example two
The present embodiment provides a signal conversion circuit for converting an HDMI signal issued by an output device into a Type-C signal to be transmitted to a reception device having a Type-C interface.
The signal conversion circuit includes the circuit structure provided in the first embodiment, in this embodiment, the signal receiving module 11, the decoding and decrypting module 12, the encoding and encrypting module 13, the signal sending module 14, the CC control module 15, the power supply module 17, and the auxiliary signal control module 16 are all integrated in a data conversion chip, and a specific data conversion chip of this embodiment adopts an LT6711A chip. After the Type-C interface 3 is inserted into the display, after CC (CC is a short for Configuration Channel) protocol communication is performed between the display and the CC control module 15, the display outputs 5V voltage to the switching circuit, so as to supply power to the whole circuit.
The voltage-reducing circuit 4 of this embodiment adopts three power conversion chips, specifically, the first voltage-reducing module 41 and the second voltage-reducing module 42 both adopt one JW5211 DC TO DC power conversion chip TO reduce the 5V voltage TO 1.2V and 1.8V voltage respectively for the power supply module 17, and the third voltage-reducing module 43 adopts one WL2805N33-3/TR chip TO reduce the 5V input voltage TO 3.3V for the power supply module 17. These three sets of voltages then power the LT6711A chip for its operation. Meanwhile, a 27MHz passive crystal oscillator is adopted by the LT6711A externally-hung clock circuit to provide a stable clock signal for the LT6711A during operation. When the TMDS input from the HDMI signal source is sent to LT6711A, LT6711A converts the TMDS signal into a DP signal, and then communicates with the display through the CC protocol communication signal sent by the CC control module 15, so that the display realizes the display of the DP signal on the display, thereby completing the display of the HDMI signal on the USB Type-C display. At this time, if the USB interface 6 is connected to the USB port of the HDMI signal source (i.e. output device), the data expansion function of USB2.0 is added, and one USB port of the output device is expanded to one or more USB ports on the display, so that a mouse, a keyboard, etc. can be connected at the same time.
EXAMPLE III
The present embodiment provides a signal patch cord, which includes the signal conversion circuit provided in the first embodiment or the second embodiment, and the signal patch cord is formed by encapsulating the signal conversion circuit, where one end of the signal patch cord is a Type-C interface and the other end of the signal patch cord is an HDMI interface.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (10)
1. A signal conversion circuit for signal conversion between an HDMI interface and a Type-C interface, comprising: the device comprises a signal receiving module, a signal conversion module and a signal sending module;
the signal receiving module is used for receiving the HDMI signal output by the HDMI interface and sending the HDMI signal to the signal conversion module;
the signal conversion module is used for converting the HDMI signal into a Type-C signal and outputting the Type-C signal to the signal sending module;
the signal sending module is used for outputting the Type-C signal to the Type-C interface.
2. The signal conversion circuit according to claim 1, wherein the signal conversion module includes a decoding decryption module and an encoding encryption module;
the decoding and decrypting module is used for decoding and decrypting the HDMI signals of the TMDS mechanism and sending the decoded and decrypted data to the encoding and encrypting module, and the encoding and encrypting module is used for encoding and encrypting the decoded and decrypted data to obtain the Type-C signals of the DP mechanism.
3. The signal conversion circuit of claim 2, further comprising a CC control module to establish a communication connection with a receiving device connected on the Type-C interface.
4. The signal conversion circuit according to claim 3, further comprising an auxiliary signal control module, wherein the auxiliary signal control module is configured to communicate with a receiving device connected to the Type-C interface, acquire EDID (extended display identification data) related information of the receiving device, and control the resolution and the rate of the Type-C signal output according to the EDID related information.
5. The signal conversion circuit of claim 1, further comprising a Type-C interface, an input of the Type-C interface being connected to an output of the signal transmission module, an output thereof being used to connect to a receiving device;
the HDMI interface is characterized by further comprising an HDMI interface, wherein the input end of the HDMI interface is used for being connected with output equipment, and the output end of the HDMI interface is connected with the input end of the signal receiving module.
6. The signal conversion circuit of claim 5, further comprising a power module, wherein an input terminal of the power module is connected to the Type-C interface, and an output terminal of the power module is connected to the signal receiving module, the signal conversion module, the signal sending module, the CC control module, and the auxiliary signal control module.
7. The signal conversion circuit according to claim 6, further comprising a voltage reduction circuit, wherein the voltage reduction circuit is disposed between the Type-C interface and the power module, and is configured to reduce a high voltage input by an external device into multiple low voltages and supply the multiple low voltages to the power module.
8. The signal conversion circuit of claim 7, further comprising a USB interface, the USB interface being connected to the Type-C interface, the USB interface being configured to connect to an output device such that a USB port on the output device is communicatively connected to the Type-C interface;
still include switching circuit, the Type-C interface pass through switching circuit with the step-down circuit is connected, the USB interface still with switching circuit connects, output device still passes through the USB interface to the switching circuit power supply, switching circuit is used for switching USB interface and/or Type-C interface with the step-down circuit switches on.
9. The signal conversion circuit of claim 8, further comprising a clock circuit coupled to the signal receiving module, the signal conversion module, and the signal transmitting module for providing a clock signal;
the voltage reduction circuit comprises a first voltage reduction circuit, a second voltage reduction circuit and a third voltage reduction circuit, and the first voltage reduction circuit, the second voltage reduction circuit and the third voltage reduction circuit are respectively used for reducing input voltage into voltage with different sizes and supplying the voltage to the power supply module.
10. A signal patch cord comprising a switching circuit as claimed in any one of claims 7 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020618472.4U CN211656158U (en) | 2020-04-22 | 2020-04-22 | Signal conversion circuit and signal patch cord |
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| CN202020618472.4U CN211656158U (en) | 2020-04-22 | 2020-04-22 | Signal conversion circuit and signal patch cord |
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| CN211656158U true CN211656158U (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114979260A (en) * | 2022-05-12 | 2022-08-30 | 深圳市绿联科技股份有限公司 | Protocol-based communication method and device, electronic equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114979260A (en) * | 2022-05-12 | 2022-08-30 | 深圳市绿联科技股份有限公司 | Protocol-based communication method and device, electronic equipment and storage medium |
| CN114979260B (en) * | 2022-05-12 | 2023-09-15 | 深圳市绿联科技股份有限公司 | Protocol-based communication method and device, electronic equipment and storage medium |
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Address after: 518109 1st-6th floor, 1st floor, 6th floor, No.7 office building, yuan plant area, Longcheng industry and trade, Gaofeng community, Dalang street, Longhua District, Shenzhen, Guangdong Province Patentee after: Shenzhen lvlian Technology Co.,Ltd. Address before: 518109 1st-6th floor, 1st floor, 6th floor, No.7 office building, yuan plant area, Longcheng industry and trade, Gaofeng community, Dalang street, Longhua District, Shenzhen, Guangdong Province Patentee before: SHENZHEN GREEN CONNECTION TECHNOLOGY Co.,Ltd. |