Video signal transmission circuit for Type-C interface

Abstract

The utility model provides a video signal transmission circuit for a Type-C interface, which comprises a DP signal conversion circuit, the input end of the DP signal conversion circuit can receive DP video signals of intelligent electronic equipment through the Type-C interface, and the output end of the DP signal conversion circuit is connected with the input end of an HDMI signal coding circuit. The output end of the HDMI signal coding circuit is connected with the input end of the wireless signal transmitting circuit, the output end of the wireless signal transmitting circuit is connected with the input end of the wireless signal receiving circuit, the output end of the wireless signal receiving circuit is connected with the input end of the HDMI signal decoding circuit, and the output end of the HDMI signal decoding circuit can be connected with HDMI signal display equipment. The beneficial effects of the utility model are that DP video signals can be converted into HDMI signals, and then the HDMI signals are wirelessly transmitted to the display for display through WIFI, the signal loss ratio is low, the wireless transmission distance is long, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, and particularly relates to a video signal transmission circuit for a Type-C interface. Background Art

[0002] Type-C is a connection interface of the USB interface. It can be inserted regardless of the front and back sides, with a size of about 8.3mm×2.5mm, and supports functions such as USB-standard charging, data transmission, and display output like other interfaces. Type-C is formulated by the USB Implementers Forum and began to be popularized after being supported by manufacturers such as Apple, Google, Intel, and Microsoft in 2014.

[0003] With the wide application of the Type-C interface in intelligent electronic devices such as computers and mobile phones, the Type-C interface greatly meets the convenience needs of users. For example, the Type-C interface can be used for both charging and data transmission. DP, that is, DisplayPort, is a high-definition digital display interface standard that can connect a computer and a monitor. When the Type-C interface is used for DP video data transmission, since the Type-C interface uses 8.1Gbp high-speed communication, the signal loss will be serious. If the wire is too long, black screen and mosaic phenomena will occur. Therefore, the wire length of the Type-C interface is usually less than 1.5 meters, which leads to a relatively small distance range for connecting the monitor. This is a very bad user experience for users. Summary of the Utility Model

[0004] To solve the problems in the prior art, the utility model provides a video signal transmission circuit for a Type-C interface. By setting a DP signal conversion circuit, an HDMI signal encoding circuit, a wireless signal transmitting circuit, a wireless signal receiving circuit, and an HDMI signal decoding circuit that cooperate with each other in the video signal transmission circuit for the Type-C interface, it can realize converting the DP video signal into an HDMI signal and then wirelessly transmitting it to the monitor for display through WIFI. The signal loss ratio is low, and the wireless transmission distance is far, greatly improving the user experience and solving the problems in the prior art that when the Type-C interface is used for DP video data transmission, a too long wire is likely to cause a high signal loss ratio, and a short wire length will result in a short connection distance for the monitor.

[0005] A video signal transmission circuit for a Type-C interface provided by the present utility model includes a DP signal conversion circuit, an HDMI signal encoding circuit, a wireless signal transmitting circuit, a wireless signal receiving circuit, and an HDMI signal decoding circuit. The input end of the DP signal conversion circuit can receive the DP video signal of an intelligent electronic device through the Type-C interface. The output end of the DP signal conversion circuit is connected to the input end of the HDMI signal encoding circuit. The output end of the HDMI signal encoding circuit is connected to the input end of the wireless signal transmitting circuit. The output end of the wireless signal transmitting circuit is connected to the input end of the wireless signal receiving circuit. The output end of the wireless signal receiving circuit is connected to the input end of the HDMI signal decoding circuit. The output end of the HDMI signal decoding circuit can be connected to an HDMI signal display device. The DP signal conversion circuit can receive the DP video signal of the intelligent electronic device through the Type-C interface and convert it into an HDMI signal, which is then encoded by the HDMI signal encoding circuit, transmitted by the wireless signal transmitting circuit, received by the wireless signal receiving circuit, and decoded by the HDMI signal decoding circuit and then output to the HDMI signal display device for display.

[0006] For further improvement of the present utility model, a DP signal conversion chip U1 is provided in the DP signal conversion circuit. The DP signal conversion chip U1 has 49 pins. The 43rd, 44th, 46th, and 47th pins of the DP signal conversion chip U1 can receive the DP video signal of the intelligent electronic device through the Type-C interface. The 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U1 are connected to the input end of the HDMI signal encoding circuit.

[0007] For further improvement of the present utility model, an HDMI signal encoding chip U5 is provided in the HDMI signal encoding circuit. The HDMI signal encoding chip U5 has 89 pins. The 7th, 8th, 9th, 10th, 11th, 12th, 13th, and 14th pins of the HDMI signal encoding chip U5 are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U1. The 43rd and 44th pins of the HDMI signal encoding chip U5 are connected to the input end of the wireless signal transmitting circuit.

[0008] The present utility model is further improved. The wireless signal transmitting circuit is internally provided with a video signal transmitting chip U10, a resistor R58, a resistor R59, an inductor L6, and an antenna RF1. The video signal transmitting chip U10 has 22 pins. The 12th pin of the video signal transmitting chip U10 is connected to the 43rd pin of the HDMI signal encoding chip U5 through the resistor R58. The 13th pin of the video signal transmitting chip U10 is connected to the 44th pin of the HDMI signal encoding chip U5 through the resistor R58. The 2nd pin of the video signal transmitting chip U10 is connected to one end of the antenna RF1 through the inductor L6, and the other end of the antenna RF1 is grounded.

[0009] The present utility model is further improved. The wireless signal receiving circuit is internally provided with a video signal receiving chip U17, an inductor L10, and an antenna RF2. The video signal receiving chip U17 has 22 pins. The 12th and 13th pins of the video signal receiving chip U17 are connected to the input end of the HDMI signal decoding circuit. The 2nd pin of the video signal receiving chip U17 is connected to one end of the antenna RF2 through the inductor L10, and the other end of the antenna RF2 is grounded.

[0010] The present utility model is further improved. The HDMI signal decoding circuit is internally provided with an HDMI signal decoding chip U13. The HDMI signal decoding chip U13 has 69 pins. The 33rd and 34th pins of the HDMI signal decoding chip U13 are respectively connected to the 12th and 13th pins of the video signal receiving chip U17. The 6th, 7th, 9th, 10th, 11th, 12th, 14th, 15th, 17th, and 18th pins of the HDMI signal decoding chip U13 can be connected to an HDMI signal display device.

[0011] The present utility model is further improved. The model of the DP signal conversion chip U1 is GSV2201S.

[0012] The present utility model is further improved. The models of the HDMI signal encoding chip U5 and the HDMI signal decoding chip U13 are AM8360D.

[0013] The present utility model is further improved. The models of the video signal transmitting chip U10 and the video signal receiving chip U17 are AM9421.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: A video signal transmission circuit for a Type-C interface is provided. By setting a DP signal conversion circuit, an HDMI signal encoding circuit, a wireless signal transmitting circuit, a wireless signal receiving circuit, and an HDMI signal decoding circuit that cooperate with each other in the video signal transmission circuit for the Type-C interface, the DP signal conversion circuit can receive the DP video signal of the intelligent electronic device and send it to the DP signal conversion circuit to be converted into an HDMI signal, which is then encoded by the HDMI signal encoding circuit, transmitted by the wireless signal transmitting circuit, received by the wireless signal receiving circuit, and decoded by the HDMI signal decoding circuit and then output to the HDMI signal display device for display. It can realize converting the DP video signal into an HDMI signal and then wirelessly transmitting it to the display through WIFI for display. The signal loss ratio is low, and the wireless transmission distance is far, greatly improving the user experience and solving the problems in the prior art that when the Type-C interface is used for DP video data transmission, too long a wire is likely to cause a high signal loss ratio, and too short a wire length will result in a short connection distance to the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic block diagram of a video signal transmission circuit for a Type-C interface of the present utility model;

[0017] Figure 2 It is a circuit diagram of the DP signal conversion circuit of the present utility model;

[0018] Figure 3 It is a circuit diagram of the HDMI signal encoding circuit of the present utility model;

[0019] Figure 4 It is a circuit diagram of the wireless signal transmitting circuit of the present utility model;

[0020] Figure 5 It is a circuit diagram of the wireless signal receiving circuit of the present utility model;

[0021] Figure 6 It is a circuit diagram of the HDMI signal decoding circuit of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this utility model; the terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this utility model or the above drawings are used to distinguish different objects and not to describe a specific order.

[0023] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this utility model. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] To enable those skilled in the art to better understand the solution of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the drawings.

[0025] Such as Figures 1-6As shown in the figure, a video signal transmission circuit for a Type-C interface provided by the present utility model includes a DP signal conversion circuit, an HDMI signal encoding circuit, a wireless signal transmitting circuit, a wireless signal receiving circuit, and an HDMI signal decoding circuit. The input end of the DP signal conversion circuit can receive the DP video signal of the intelligent electronic device through the Type-C interface. The output end of the DP signal conversion circuit is connected to the input end of the HDMI signal encoding circuit. The output end of the HDMI signal encoding circuit is connected to the input end of the wireless signal transmitting circuit. The output end of the wireless signal transmitting circuit is connected to the input end of the wireless signal receiving circuit. The output end of the wireless signal receiving circuit is connected to the input end of the HDMI signal decoding circuit. The output end of the HDMI signal decoding circuit can be connected to an HDMI signal display device. In this embodiment, the DP signal conversion circuit can receive the DP video signal of the intelligent electronic device through the Type-C interface and convert it into an HDMI signal. After being encoded by the HDMI signal encoding circuit, transmitted by the wireless signal transmitting circuit, received by the wireless signal receiving circuit, and decoded by the HDMI signal decoding circuit, it is output to the HDMI signal display device for display. It can realize converting the DP video signal into an HDMI signal and then wirelessly transmitting it to the display through WIFI for display. The signal loss ratio is low, and the wireless transmission distance is far, greatly improving the user experience. Among them, HDMI refers to High Definition Multimedia Interface (English: High Definition Multimedia Interface, HDMI), which is a digital video / audio interface technology and a dedicated digital interface suitable for video transmission. It can transmit audio and video signals simultaneously, with a maximum data transmission speed of 2.25GB / s. At the same time, there is no need to perform digital-to-analog or analog-to-digital conversion before signal transmission. HDMI can be paired with High-bandwidth Digital Content Protection (HDCP) to prevent unauthorized copying of copyrighted audio and video content. The extra space provided by HDMI can be applied to future upgraded audio and video formats. Since the requirements for a 1080p video and an 8-channel audio signal are less than 0.5GB / s, there is still a large margin in HDMI, which allows it to connect a DVD player, a receiver, and a PRR with one cable respectively.

[0026] As Figure 2As shown, a DP signal conversion chip U1 is provided inside the DP signal conversion circuit. The model of the DP signal conversion chip U1 is GSV2201S. The DP signal conversion chip U1 has 49 pins. The 43rd, 44th, 46th, and 47th pins of the DP signal conversion chip U1 can receive the DP video signal of the smart electronic device through the Type-C interface. The 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U1 are connected to the input end of the HDMI signal encoding circuit. In this embodiment, the DP signal conversion circuit is used to receive the DP video signal of the smart electronic device through the Type-C interface and convert it into an HDMI signal for output to the HDMI signal encoding circuit.

[0027] As Figure 3 shown, an HDMI signal encoding chip U5 is provided inside the HDMI signal encoding circuit. The model of the HDMI signal encoding chip U5 is AM8360D. The HDMI signal encoding chip U5 has 89 pins. The 7th, 8th, 9th, 10th, 11th, 12th, 13th, and 14th pins of the HDMI signal encoding chip U5 are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U1. The 43rd and 44th pins of the HDMI signal encoding chip U5 are connected to the input end of the wireless signal transmission circuit. In this embodiment, the HDMI signal encoding circuit is used to encode the HDMI signal and send it to the wireless signal transmission circuit.

[0028] As Figure 4 shown, a video signal transmission chip U10, a resistor R58, a resistor R59, an inductor L6, and an antenna RF1 are provided inside the wireless signal transmission circuit. The model of the video signal transmission chip U10 is AM9421. The video signal transmission chip U10 has 22 pins. The 12th pin of the video signal transmission chip U10 is connected to the 43rd pin of the HDMI signal encoding chip U5 through the resistor R58. The 13th pin of the video signal transmission chip U10 is connected to the 44th pin of the HDMI signal encoding chip U5 through the resistor R58. The 2nd pin of the video signal transmission chip U10 is connected to one end of the antenna RF1 through the inductor L6. The other end of the antenna RF1 is grounded. In this embodiment, the wireless signal transmission circuit is used to send out the encoded HDMI video signal.

[0029] As Figure 5As shown in the figure, a video signal receiving chip U17, an inductor L10, and an antenna RF2 are provided in the wireless signal receiving circuit. The model of the video signal receiving chip U17 is AM9421. The video signal receiving chip U17 has 22 pins. The 12th and 13th pins of the video signal receiving chip U17 are connected to the input end of the HDMI signal decoding circuit. The 2nd pin of the video signal receiving chip U17 is connected to one end of the antenna RF2 through the inductor L10, and the other end of the antenna RF2 is grounded. In this embodiment, the wireless signal receiving circuit is used to receive the encoded HDMI video signal transmitted by the wireless signal transmitting circuit and transmit it to the HDMI signal decoding circuit.

[0030] As Figure 6 shown in the figure, an HDMI signal decoding chip U13 is provided in the HDMI signal decoding circuit. The model of the HDMI signal decoding chip U13 is AM8360D. The HDMI signal decoding chip U13 has 69 pins. The 33rd and 34th pins of the HDMI signal decoding chip U13 are respectively connected to the 12th and 13th pins of the video signal receiving chip U17. The 6th, 7th, 9th, 10th, 11th, 12th, 14th, 15th, 17th, and 18th pins of the HDMI signal decoding chip U13 can be connected to the HDMI signal display device. In this embodiment, the HDMI signal decoding circuit is used to decode the encoded HDMI video signal and transmit it to the HDMI signal display device for display.

[0031] As can be seen from the above, the present invention provides a video signal transmission circuit for a Type-C interface. By setting a DP signal conversion circuit, an HDMI signal encoding circuit, a wireless signal transmitting circuit, a wireless signal receiving circuit, and an HDMI signal decoding circuit that cooperate with each other in the video signal transmission circuit for the Type-C interface, the DP signal conversion circuit can receive the DP video signal of the intelligent electronic device and send it to the DP signal conversion circuit to be converted into an HDMI signal, which is then encoded by the HDMI signal encoding circuit, transmitted by the wireless signal transmitting circuit, received by the wireless signal receiving circuit, and decoded by the HDMI signal decoding circuit and then output to the HDMI signal display device for display. It can realize converting the DP video signal into an HDMI signal and then wirelessly transmitting it to the display through WIFI. The signal loss ratio is low, and the wireless transmission distance is far, greatly improving the user experience and solving the problems in the prior art that when the Type-C interface is used for DP video data transmission, too long wires are likely to cause a high signal loss ratio, and too short wire lengths will result in a short connection distance to the display.

[0032] The above-described specific implementation manner is the preferred implementation manner of the present invention, and does not limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation manner. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A video signal transmission circuit for a Type-C interface, characterized in that: It includes a DP signal conversion circuit, an HDMI signal encoding circuit, a wireless signal transmitting circuit, a wireless signal receiving circuit, and an HDMI signal decoding circuit. The input end of the DP signal conversion circuit can receive the DP video signal of the intelligent electronic device through a Type-C interface. The output end of the DP signal conversion circuit is connected to the input end of the HDMI signal encoding circuit. The output end of the HDMI signal encoding circuit is connected to the input end of the wireless signal transmitting circuit. The output end of the wireless signal transmitting circuit is connected to the input end of the wireless signal receiving circuit. The output end of the wireless signal receiving circuit is connected to the input end of the HDMI signal decoding circuit. The output end of the HDMI signal decoding circuit can be connected to an HDMI signal display device. The DP signal conversion circuit can receive the DP video signal of the intelligent electronic device through the Type-C interface and convert it into an HDMI signal, which is then encoded by the HDMI signal encoding circuit, transmitted by the wireless signal transmitting circuit, received by the wireless signal receiving circuit, and decoded by the HDMI signal decoding circuit and then output to the HDMI signal display device for display.

2. The video signal transmission circuit for a Type-C interface according to claim 1, wherein: A DP signal conversion chip U1 is provided inside the DP signal conversion circuit. The DP signal conversion chip U1 has 49 pins. The 43rd, 44th, 46th, and 47th pins of the DP signal conversion chip U1 can receive the DP video signal of the intelligent electronic device through the Type-C interface. The 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U1 are connected to the input end of the HDMI signal encoding circuit.

3. The video signal transmission circuit for a Type-C interface according to claim 2, wherein: An HDMI signal encoding chip U5 is provided inside the HDMI signal encoding circuit. The HDMI signal encoding chip U5 has 89 pins. The 7th, 8th, 9th, 10th, 11th, 12th, 13th, and 14th pins of the HDMI signal encoding chip U5 are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U1. The 43rd and 44th pins of the HDMI signal encoding chip U5 are connected to the input end of the wireless signal transmitting circuit.

4. The video signal transmission circuit for a Type-C interface according to claim 3, characterized in that: A video signal transmitting chip U10, a resistor R58, a resistor R59, an inductor L6, and an antenna RF1 are provided inside the wireless signal transmitting circuit. The video signal transmitting chip U10 has 22 pins. The 12th pin of the video signal transmitting chip U10 is connected to the 43rd pin of the HDMI signal encoding chip U5 through the resistor R58. The 13th pin of the video signal transmitting chip U10 is connected to the 44th pin of the HDMI signal encoding chip U5 through the resistor R58. The 2nd pin of the video signal transmitting chip U10 is connected to one end of the antenna RF1 through the inductor L6. The other end of the antenna RF1 is grounded.

5. The video signal transmission circuit for a Type-C interface according to claim 4, wherein: The wireless signal receiving circuit is provided with a video signal receiving chip U17, an inductor L10 and an antenna RF2. The video signal receiving chip U17 has 22 pins. The 12th and 13th pins of the video signal receiving chip U17 are connected to the input end of the HDMI signal decoding circuit. The 2nd pin of the video signal receiving chip U17 is connected to one end of the antenna RF2 through the inductor L10, and the other end of the antenna RF2 is grounded.

6. The video signal transmission circuit for a Type-C interface according to claim 5, wherein: The HDMI signal decoding circuit is provided with an HDMI signal decoding chip U13. The HDMI signal decoding chip U13 has 69 pins. The 33rd and 34th pins of the HDMI signal decoding chip U13 are respectively connected to the 12th and 13th pins of the video signal receiving chip U17. The 6th, 7th, 9th, 10th, 11th, 12th, 14th, 15th, 17th and 18th pins of the HDMI signal decoding chip U13 can be connected to an HDMI signal display device.

7. The video signal transmission circuit for a Type-C interface according to claim 6, wherein: The model of the DP signal conversion chip U1 is GSV2201S.

8. The video signal transmission circuit for a Type-C interface according to claim 7, wherein: The models of the HDMI signal encoding chip U5 and the HDMI signal decoding chip U13 are AM8360D.

9. The video signal transmission circuit for a Type-C interface according to claim 8, characterized in that: The models of the video signal transmitting chip U10 and the video signal receiving chip U17 are AM9421.

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