An HDMI optical-electrical hybrid transmission system

Abstract

The present invention provides an HDMI optoelectronic hybrid transmission system, comprising a transmitting end HDMI, a receiving end HDMI and a signal line connecting the transmitting end HDMI and the receiving end HDMI, wherein the transmitting end HDMI is built-in with a transmitting end optoelectronic module, the transmitting end optoelectronic module comprises a transmitting end circuit board, and a ground capacitance adjustment circuit is integrated on the transmitting end circuit board; and / or the receiving end HDMI is built-in with a receiving end optoelectronic module, the receiving end optoelectronic module comprises a receiving end circuit board, and a ground capacitance adjustment circuit is integrated on the receiving end circuit board. The present invention can freely adjust the capacitance value of the signal line of the low-frequency control clock signal and / or the low-frequency control data signal to the ground, thereby greatly improving the self-control ability of the HDMI optoelectronic hybrid transmission system for the transmission distance under the premise of ensuring the stability of the HDMI optoelectronic hybrid transmission system in transmitting the low-frequency control signal.

Description

[Technical field]

[0001] The present invention relates to the technical field of signal transmission, and in particular to an HDMI optical-electrical hybrid transmission system. [Background technology]

[0002] High Definition Multimedia Interface (HDMI) is a fully digital video and sound transmission interface that can send uncompressed audio and video signals. It is widely used in electronic devices such as set-top boxes, DVD players, personal computers, televisions, game consoles, integrated amplifiers, digital audio and televisions. HDMI is usually connected with signal lines (such as copper wires) to form an HDMI transmission system. In recent years, due to the limitation that copper wires cannot meet ultra-long-distance transmission, the HDMI optical-electrical hybrid transmission system composed of HDMI and optical fiber has emerged.

[0003] In the prior art, the HDMI optoelectronic hybrid transmission system generally includes a transmitter HDMI with a built-in transmitter optoelectronic module, a receiver HDMI with a built-in receiver optoelectronic module, and an optical fiber connecting the transmitter HDMI and the receiver HDMI. When transmitting video signals, the transmitter optoelectronic module is usually used to convert four pairs of high-speed differential signal pairs from electrical signals to optical signals. After being transmitted to the receiver HDMI via the optical fiber, the receiver optoelectronic module is used to convert the four pairs of high-speed differential signal pairs from optical signals to electrical signals, so as to transmit the converted electrical signals to the display terminal for display, wherein the four pairs of high-speed differential signal pairs are RGB three-color differential signal pairs and clock differential signal pairs, respectively, while other low-speed control signals and voltage signals are still transmitted using traditional copper wires. For a long time, the transmission distance of the HDMI optoelectronic hybrid transmission system is first limited by the type of optical fiber and the coupling efficiency between the optoelectronic module and the optical fiber, and secondly by the capacitance value of the signal line of the low-frequency control clock signal and the low-frequency control data signal to the ground. It can be seen from this that the transmission distance of the existing HDMI optoelectronic hybrid transmission system is not controlled by the optoelectronic module itself, resulting in the existing HDMI optoelectronic hybrid transmission system having a weak self-control ability for the transmission distance.

[0004] Therefore, it is necessary to improve the structure of the above-mentioned HDMI optical-electrical hybrid transmission system. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is to provide a HDMI optical-electrical hybrid transmission system to solve the problem that the HDMI optical-electrical hybrid transmission system in the prior art has a weak self-control capability for transmission distance.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The embodiment of the present invention provides an HDMI optoelectronic hybrid transmission system, comprising: a transmitting end HDMI, a receiving end HDMI and a signal line connecting the transmitting end HDMI and the receiving end HDMI, the transmitting end HDMI having a built-in transmitting end optoelectronic module, the transmitting end optoelectronic module including a transmitting end circuit board, and a ground capacitance adjustment circuit integrated on the transmitting end circuit board; and / or

[0008] The receiving end HDMI has a built-in receiving end optoelectronic module, and the receiving end optoelectronic module includes a receiving end circuit board, and a ground capacitance adjustment circuit is integrated on the receiving end circuit board.

[0009] In some embodiments, the signal line includes: optical fiber and copper wire.

[0010] In some embodiments, the transmitting end HDMI and the receiving end HDMI are correspondingly provided with a power pin, a ground pin and a low-frequency control clock signal pin, and the two power pins, the two ground pins and the two low-frequency control clock signal pins are all connected through the copper wire, and the first equivalent circuit of the ground capacitance adjustment circuit includes: a first resistor, a second resistor, a third resistor and a first capacitor, one end of the first resistor is connected to the low-frequency control clock signal pin of the transmitting end HDMI through the copper wire, and the other end of the first resistor is connected to the low-frequency control clock signal pin of the receiving end HDMI through the copper wire;

[0011] One end of the second resistor is connected to the copper wire between the first resistor and the low-frequency control clock signal pin of the transmitting end HDMI, and the other end of the second resistor is connected to the copper wire between the two power pins;

[0012] One end of the third resistor is connected to the copper wire between the first resistor and the low-frequency control clock signal pin of the receiving end HDMI, and the other end of the third resistor is connected to the copper wire between the two power pins;

[0013] One end of the first capacitor is connected to the copper wire between the first resistor and the low-frequency control clock signal pin of the receiving end HDMI, and the other end of the first capacitor is connected to the copper wire between the two ground pins.

[0014] In some embodiments, the transmitting end HDMI and the receiving end HDMI are also correspondingly provided with low-frequency control data signal pins, and the second equivalent circuit of the ground capacitance adjustment circuit includes: a fourth resistor, a fifth resistor, a sixth resistor and a second capacitor, one end of the fourth resistor is connected to the low-frequency control data signal pin of the transmitting end HDMI through the copper wire, and the other end of the fourth resistor is connected to the low-frequency control data signal pin of the receiving end HDMI through the copper wire;

[0015] One end of the fifth resistor is connected to the copper wire between the fourth resistor and the low-frequency control data signal pin of the transmitting end HDMI, and the other end of the fifth resistor is connected to the copper wire between the two power pins;

[0016] One end of the sixth resistor is connected to the copper wire between the fourth resistor and the low-frequency control data signal pin of the receiving end HDMI, and the other end of the sixth resistor is connected to the copper wire between the two power pins;

[0017] One end of the second capacitor is connected to the copper wire between the fourth resistor and the low-frequency control data signal pin of the receiving end HDMI, and the other end of the second capacitor is connected to the copper wire between the two ground pins.

[0018] In some embodiments, the equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the first equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the second equivalent circuit; or

[0019] The equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the second equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the first equivalent circuit; or

[0020] The equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the first equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the first equivalent circuit; or

[0021] The equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the second equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the second equivalent circuit.

[0022] It can be seen from the above description that, compared with the prior art, the beneficial effects of the present invention are:

[0023] The ground capacitance adjustment circuit is integrated on the transmitting end circuit board and / or the ground capacitance adjustment circuit is integrated on the receiving end circuit board, so that during the operation of the HDMI optoelectronic hybrid transmission system, the capacitance value of the signal line of the low-frequency control clock signal and / or the low-frequency control data signal to the ground can be freely adjusted through the ground capacitance adjustment circuit integrated on the transmitting end circuit board and / or the ground capacitance adjustment circuit integrated on the receiving end circuit board, thereby greatly improving the self-control ability of the HDMI optoelectronic hybrid transmission system for the transmission distance while ensuring the stability of the HDMI optoelectronic hybrid transmission system in transmitting the low-frequency control signal.

Brief Description of the Drawings

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can also be obtained based on the provided drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of an HDMI optical-electrical hybrid transmission system provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the circuit structure of a first equivalent circuit of the ground capacitance adjustment circuit provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the circuit structure of a second equivalent circuit of the ground capacitance adjustment circuit provided in an embodiment of the present invention. [Specific implementation method]

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] See also Figure 1 , Figure 1 The present invention provides a schematic diagram of the structure of an HDMI optical-electrical hybrid transmission system.

[0030] like Figure 1 As shown, an embodiment of the present invention provides an HDMI optoelectronic hybrid transmission system, including a transmitter HDMI100, a receiver HDMI200, and a signal line 300 connecting the transmitter HDMI100 and the receiver HDMI200, wherein the transmitter HDMI100 is built with a transmitter optoelectronic module (not shown in the figure), the transmitter optoelectronic module includes a transmitter circuit board (not shown in the figure), and a ground capacitance adjustment circuit (not shown in the figure) is integrated on the transmitter circuit board. It should be noted that the ground capacitance adjustment circuit integrated on the transmitter circuit board is intended to adjust the equivalent capacitance value of the signal line of the low-frequency control clock signal and / or the low-frequency control data signal to the ground.

[0031] In practical applications, when the above-mentioned HDMI optoelectronic hybrid transmission system provided by the embodiment of the present invention is in a working state, the equivalent capacitance value of the signal line of the low-frequency control clock signal and / or the low-frequency control data signal to the ground can be freely adjusted through the capacitance adjustment circuit to the ground integrated on the transmitting end circuit board, so that the equivalent capacitance value of the signal line of the low-frequency control clock signal and / or the low-frequency control data signal to the ground reaches the expected value.

[0032] Furthermore, the above-mentioned receiving end HDMI200 also has a built-in receiving end optoelectronic module (not shown in the figure), and the receiving end optoelectronic module includes a receiving end circuit board (not shown in the figure). At this time, the ground capacitance adjustment circuit integrated on the transmitting end circuit board can be integrated on the receiving end circuit board.

[0033] Of course, the setting position and number of the above-mentioned ground capacitance adjustment circuit are not limited to this. In other embodiments, the ground capacitance adjustment circuit can be integrated on the transmitting end circuit board and the receiving end circuit board at the same time, and one or more ground capacitance adjustment circuits can be integrated on the same circuit board. In this case, the number of ground capacitance adjustment circuits is greater than or equal to two. It should be understood that when the number of ground capacitance adjustment circuits is greater than or equal to two, the circuit structure of each ground capacitance adjustment circuit may be the same or different. Based on this, the setting position, number and specific circuit structure of the ground capacitance adjustment circuit are determined according to the actual application scenario, and the embodiment of the present invention does not limit this.

[0034] In the above-mentioned HDMI optoelectronic hybrid transmission system provided by the embodiment of the present invention, a ground capacitance adjustment circuit is integrated on the transmitting end circuit board and / or a ground capacitance adjustment circuit is integrated on the receiving end circuit board, so that during the operation of the HDMI optoelectronic hybrid transmission system, the ground capacitance adjustment circuit integrated on the transmitting end circuit board and / or the ground capacitance adjustment circuit integrated on the receiving end circuit board can be used to freely adjust the equivalent capacitance value of the signal line of the low-frequency control clock signal and / or the low-frequency control data signal to the ground, thereby greatly improving the self-control ability of the HDMI optoelectronic hybrid transmission system for the transmission distance while ensuring the stability of the HDMI optoelectronic hybrid transmission system in transmitting the low-frequency control signal.

[0035] Please read further Figure 2 as well as Figure 3 , Figure 2 A schematic diagram of the circuit structure of a first equivalent circuit of the ground capacitance adjustment circuit provided in an embodiment of the present invention, Figure 3 A schematic diagram of the circuit structure of a second equivalent circuit of the ground capacitance adjustment circuit provided in an embodiment of the present invention.

[0036] As a feasible implementation, the signal line 300 connecting the transmitting end HDMI100 and the receiving end HDMI200 can be composed of at least one optical fiber and at least one copper wire. It should be understood that the number of optical fibers and the number of copper wires are determined according to the actual application scenario, and the embodiment of the present invention does not limit this.

[0037] Further, such as Figure 2 As shown, the transmitting end HDMI100 and the receiving end HDMI200 may be provided with power pins (A1 and A2), ground pins (D1 and D2) and low-frequency control clock signal pins (B1 and B2) respectively, and the two power pins A1 and A2, the two ground pins D1 and D2 and the two low-frequency control clock signal pins B1 and B2 may be connected by copper wires (310, 321, 322 and 330).

[0038] On this basis, the first equivalent circuit of the above-mentioned ground capacitance adjustment circuit may include a first resistor R1, a second resistor R2, a third resistor R3 and a first capacitor C1, wherein one end of the first resistor R1 is connected to the low-frequency control clock signal pin B1 of the transmitting end HDMI100 through a copper wire 321, and the other end of the first resistor R1 is connected to the low-frequency control clock signal pin B2 of the receiving end HDMI200 through a copper wire 322; one end of the second resistor R2 is connected to the copper wire 321 between the first resistor R1 and the low-frequency control clock signal pin B1 of the transmitting end HDMI100. 1, the other end of the second resistor R2 is connected to the copper wire 310 between the two power pins A1 and A2; one end of the third resistor R3 is connected to the copper wire 322 between the first resistor R1 and the low-frequency control clock signal pin B2 of the receiving end HDMI200, and the other end of the third resistor R3 is connected to the copper wire 310 between the two power pins A1 and A2; one end of the first capacitor C1 is connected to the copper wire 322 between the first resistor R1 and the low-frequency control clock signal pin B2 of the receiving end HDMI200, and the other end of the first capacitor C1 is connected to the copper wire 330 between the two ground pins D1 and D2.

[0039] Furthermore, Figure 3 As shown, the transmitting end HDMI100 and the receiving end HDMI200 may also be provided with low-frequency control data signal pins (E1 and E2) correspondingly.

[0040] On this basis, the second equivalent circuit of the above-mentioned ground capacitance adjustment circuit may include a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a second capacitor C2, wherein one end of the fourth resistor R4 is connected to the low-frequency control data signal pin E1 of the transmitting end HDMI100 through a copper wire 341, and the other end of the fourth resistor R4 is connected to the low-frequency control data signal pin E2 of the receiving end HDMI200 through a copper wire 342; one end of the fifth resistor R5 is connected to the copper wire 341 between the fourth resistor R4 and the low-frequency control data signal pin E1 of the transmitting end HDMI100. 1, the other end of the fifth resistor R5 is connected to the copper wire 310 between the two power pins A1 and A2; one end of the sixth resistor R6 is connected to the copper wire 342 between the fourth resistor R4 and the low-frequency control data signal pin E2 of the receiving end HDMI200, and the other end of the sixth resistor R6 is connected to the copper wire 310 between the two power pins A1 and A2; one end of the second capacitor C2 is connected to the copper wire 342 between the fourth resistor R4 and the low-frequency control data signal pin E2 of the receiving end HDMI200, and the other end of the second capacitor C2 is connected to the copper wire 330 between the two ground pins D1 and D2.

[0041] Of course, the structural form of the equivalent circuit of the above-mentioned ground capacitance adjustment circuit is not limited to the two equivalent circuits shown above. In other embodiments, the structural form of the equivalent circuit of the above-mentioned ground capacitance adjustment circuit can be a simple equivalent circuit constructed by multiple simple components (similar to the two equivalent circuits shown above), or it can be a complex equivalent circuit constructed by a chip or an MCU microcontroller, for example, a complex equivalent circuit constructed by a chip with a capacitance equivalent function (such as a P82B96 chip), etc. The embodiment of the present invention is not limited to this.

[0042] In addition, when the equivalent circuit of the ground capacitance adjustment circuit on the above-mentioned transmitting end circuit board is the first equivalent circuit, the equivalent circuit of the ground capacitance adjustment circuit on the above-mentioned receiving end circuit board may be the second equivalent circuit or the first equivalent circuit; when the equivalent circuit of the ground capacitance adjustment circuit on the above-mentioned transmitting end circuit board is the second equivalent circuit, the equivalent circuit of the ground capacitance adjustment circuit on the above-mentioned receiving end circuit board may be the first equivalent circuit or the second equivalent circuit, and the embodiment of the present invention does not limit this.

[0043] It should be noted that the various embodiments in the present invention are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0044] It should also be noted that, in the context of the present invention, relational terms such as first and second, etc., are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0045] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined in the present invention can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in the present invention, but will conform to the widest range consistent with the principles and novel features disclosed in the present invention.

Claims

1. An HDMI optical-electrical hybrid transmission system, characterized in that: include: A transmitting end HDMI, a receiving end HDMI and a signal line connecting the transmitting end HDMI and the receiving end HDMI, the transmitting end HDMI has a built-in transmitting end optoelectronic module, the transmitting end optoelectronic module includes a transmitting end circuit board, and a ground capacitance adjustment circuit is integrated on the transmitting end circuit board; and / or The receiving end HDMI has a built-in receiving end optoelectronic module, the receiving end optoelectronic module includes a receiving end circuit board, and the receiving end circuit board is integrated with a ground capacitance adjustment circuit; The signal line includes: optical fiber and copper wire; The transmitting end HDMI and the receiving end HDMI are correspondingly provided with a power pin, a ground pin and a low-frequency control clock signal pin, and the two power pins, the two ground pins and the two low-frequency control clock signal pins are all connected through the copper wire, and the first equivalent circuit of the ground capacitance adjustment circuit includes: a first resistor, a second resistor, a third resistor and a first capacitor, one end of the first resistor is connected to the low-frequency control clock signal pin of the transmitting end HDMI through the copper wire, and the other end of the first resistor is connected to the low-frequency control clock signal pin of the receiving end HDMI through the copper wire; One end of the second resistor is connected to the copper wire between the first resistor and the low-frequency control clock signal pin of the transmitting end HDMI, and the other end of the second resistor is connected to the copper wire between the two power pins; One end of the third resistor is connected to the copper wire between the first resistor and the low-frequency control clock signal pin of the receiving end HDMI, and the other end of the third resistor is connected to the copper wire between the two power pins; One end of the first capacitor is connected to the copper wire between the first resistor and the low-frequency control clock signal pin of the receiving end HDMI, and the other end of the first capacitor is connected to the copper wire between the two ground pins.

2. The HDMI optical-electrical hybrid transmission system according to claim 1, characterized in that: The transmitting end HDMI and the receiving end HDMI are also correspondingly provided with low-frequency control data signal pins, and the second equivalent circuit of the ground capacitance adjustment circuit includes: a fourth resistor, a fifth resistor, a sixth resistor and a second capacitor, one end of the fourth resistor is connected to the low-frequency control data signal pin of the transmitting end HDMI through the copper wire, and the other end of the fourth resistor is connected to the low-frequency control data signal pin of the receiving end HDMI through the copper wire; One end of the fifth resistor is connected to the copper wire between the fourth resistor and the low-frequency control data signal pin of the transmitting end HDMI, and the other end of the fifth resistor is connected to the copper wire between the two power pins; One end of the sixth resistor is connected to the copper wire between the fourth resistor and the low-frequency control data signal pin of the receiving end HDMI, and the other end of the sixth resistor is connected to the copper wire between the two power pins; One end of the second capacitor is connected to the copper wire between the fourth resistor and the low-frequency control data signal pin of the receiving end HDMI, and the other end of the second capacitor is connected to the copper wire between the two ground pins.

3. The HDMI optical-electrical hybrid transmission system according to claim 2, characterized in that: The equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the first equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the second equivalent circuit; or The equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the second equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the first equivalent circuit; or The equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the first equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the first equivalent circuit; or The equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the second equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the second equivalent circuit.

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