JP3240636U - HDMI photoelectric hybrid transmission system - Google Patents

Abstract

The present invention provides an HDMI optoelectronic hybrid transmission system, which includes a transmitting end HDMI, a receiving end HDMI, and a signal line connecting the transmitting end HDMI and the receiving end HDMI. an end opto-electrical module is built in, the transmitting end opto-electrical module includes a transmitting end circuit board, the transmitting end circuit board is integrated with a ground capacitance adjustment circuit, and/or the receiving end HDMI contains a receiving end opto-electrical module; The receiving end optoelectronic module includes a receiving end circuit board, and a ground capacitance adjusting circuit is integrated on the receiving end circuit board. The present invention can freely adjust the ground capacitance value of the signal line for the low-frequency control clock signal and/or the low-frequency control data signal. As a result, the self-control capability of the HDMI opto-electronic hybrid transmission system with respect to the transmission distance is greatly improved on the premise that the HDMI opto-electronic hybrid transmission system ensures the stability of transmitting the low-frequency control signal. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to the field of signal transmission technology, and more particularly to an HDMI optoelectronic hybrid transmission system.

High Definition Multimedia Interface (HDMI) is a fully digitized video and audio transmission interface, capable of transmitting uncompressed audio and video signals, used in set-top boxes, DVD players , Widely used in electronic equipment such as personal computers, televisions, game consoles, compound amplifiers, and digital audio televisions. HDMI is usually connected to a signal line (e.g., copper wire) to form an HDMI transmission system, but in recent years, copper wires cannot support ultra-long-distance transmission, so an HDMI opto-electronic hybrid transmission system consisting of HDMI and optical fiber has been developed. Appeared.

In the prior art, the HDMI optoelectronic hybrid transmission system generally connects the transmitting end HDMI with the transmitting end optoelectronic module, the receiving end HDMI with the receiving end optoelectronic module built in, the transmitting end HDMI and the receiving end HDMI. When transmitting video signals, generally four pairs of high-speed differential signal pairs are converted from electrical signals to optical signals by the transmitting end optoelectronic module and transmitted to the receiving end HDMI through the optical fiber. After that, the four pairs of high-speed differential signal pairs are further converted from optical signals to electrical signals by the receiving end optoelectronic module, and the converted electrical signals are transmitted to the display terminal for display. Among them, four pairs of high-speed differential signal pairs are RGB three-color differential signal pairs and clock differential signal pairs respectively, and other low-speed control signals and voltage signals are transmitted by conventional copper wires. For a long time, the transmission distance of the HDMI optoelectronic hybrid transmission system is limited first by the type of optical fiber and the coupling efficiency between the optoelectronic module and the optical fiber, and then by the ground capacitance value of the signal line of the low frequency control clock signal and the low frequency control data signal. This shows that the transmission distance of the conventional HDMI optoelectronic hybrid transmission system is not controlled by the optoelectronic module itself, and the self-control ability of the conventional HDMI optoelectronic hybrid transmission system over the transmission distance is weak.

Therefore, there is a need to improve the structure of the above HDMI optoelectronic hybrid transmission system.

The technical problem to be solved by the present invention is to provide an HDMI optoelectronic hybrid transmission system that solves the problem in the prior art that the self-control ability of the HDMI optoelectronic hybrid transmission system with respect to the transmission distance is weak.

In order to solve the above technical problems, the present invention adopts the following technical solutions.

An embodiment of the present invention includes 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 embedded with a transmitting end photoelectric module, and the transmitting end The optoelectronic module includes a transmitting end circuit board, the transmitting end circuit board is integrated with a ground capacitance adjustment circuit, and/or the receiving end HDMI is embedded with a receiving end optoelectronic module, and the receiving end optoelectronic module is the receiving end. Provided is an HDMI optoelectronic hybrid transmission system comprising a circuit board, wherein a ground capacitance adjustment circuit is integrated on the receiving end circuit board.

In some embodiments, the signal line includes optical fiber and copper wire.

In some embodiments, the transmitting end HDMI and the receiving end HDMI are respectively provided with a power pin, a ground pin and a low-frequency control clock signal pin, between the two power pins and the two ground pins. and between the two low-frequency control clock signal pins are connected by 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 by the copper wire, and the other end of the first resistor is the receiving by the copper wire; connected to the low frequency control clock signal pin of the end HDMI;
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 two power pins. connected to said copper wire between,
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 two power pins. connected to said copper wire between,
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 two ground pins. is connected to the copper wire between.

In some embodiments, the transmitting end HDMI and the receiving end HDMI are further provided with corresponding low-frequency control data signal pins, and the second equivalent circuit of the ground capacitance adjustment circuit is a fourth resistor. , a fifth resistor, a sixth resistor and a second capacitor, one end of the fourth resistor being connected to the low frequency control data signal pin of the transmitting end HDMI by the copper wire; the other end of the resistor is connected to the low frequency control data signal pin of the receiving end HDMI by 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 two power pins. connected to said copper wire between,
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 two power pins. connected to said copper wire between,
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 two ground pins. is connected to the copper wire between.

In some embodiments, the equivalent circuit of the ground capacitance adjustment circuit in the transmitting end circuit board is the first equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit in the receiving end circuit board is the second equivalent circuit. or the equivalent circuit of the ground capacitance adjustment circuit on the transmission end circuit board is the second equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the reception end circuit board is the first equivalent circuit or an equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is the first equivalent circuit, and an 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 transmission end circuit board is the second equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the reception end circuit board is the second equivalent circuit be.

As can be seen from the above description, the beneficial effects of the present invention compared with the prior art are as follows.

With the ground capacitance adjusting circuit integrated on the transmitting end circuit board and/or the ground capacitance adjusting circuit integrated on the receiving end circuit board, the HDMI optoelectronic hybrid transmission system is integrated on the transmitting end circuit board during operation. The ground capacitance adjustment circuit and/or the ground capacitance adjustment circuit integrated on the receiving end circuit board can freely adjust the ground capacitance value of the signal line of the low frequency control clock signal and/or the low frequency control data signal. As a result, the self-control capability of the HDMI opto-electronic hybrid transmission system with respect to the transmission distance is greatly improved on the premise that the HDMI opto-electronic hybrid transmission system ensures the stability of transmitting the low-frequency control signal.

In order to explain the embodiments of the present invention or technical solutions in the prior art more clearly, the following briefly describes the drawings necessary for describing the embodiments or the prior art. Of course, the drawings described below are some embodiments of the present invention, but not all embodiments. For those skilled in the art, other drawings can be obtained further based on the examples provided without creative effort.

1 is a structural schematic diagram of an HDMI optoelectronic hybrid transmission system according to an embodiment of the present invention; FIG. 1 is a schematic diagram of a circuit structure of a first equivalent circuit of a ground capacitance adjusting circuit according to an embodiment of the present invention; FIG. FIG. 4 is a schematic diagram of the circuit structure of the second equivalent circuit of the ground capacitance adjusting circuit according to the embodiment of the present invention;

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be described in more detail below with reference to the drawings and examples. Indicates similar elements or elements with the same or similar function. It should be noted that the specific examples described herein are for the purpose of interpreting the present invention only, and are not intended to limit the present invention. Moreover, the technical features included in each embodiment of the present invention described below can be combined with each other as long as they do not contradict each other.

Please refer to FIG. 1, which is a structural schematic diagram of an HDMI optoelectronic hybrid transmission system according to an embodiment of the present invention.

As shown in FIG. 1 , the embodiment of the present invention provides an HDMI optoelectronic hybrid transmission system, which connects the transmitting end HDMI 100, the receiving end HDMI 200, and the transmitting end HDMI 100 and the receiving end HDMI 200. Including the signal line 300, the transmitting end HDMI 100 is embedded with a transmitting end photoelectric module (not shown), the transmitting end photoelectric module includes a transmitting end circuit board (not shown), and the transmitting end circuit board has a ground capacitance adjustment. A circuit (not shown) is integrated. However, the ground capacitance adjustment circuit integrated on the transmission end circuit board is intended to adjust the ground equivalent capacitance value of the signal line for the low-frequency control clock signal and/or the low-frequency control data signal.

In practical application, when the above HDMI optoelectronic hybrid transmission system according to the embodiment of the present invention is in operation, the low frequency control clock signal and/or the low frequency The ground equivalent capacitance value of the signal line for the control data signal can be freely adjusted. As a result, the ground equivalent capacitance value of the signal line for the low-frequency control clock signal and/or the low-frequency control data signal reaches the expected value.

In addition, the receiving end HDMI 200 also incorporates a receiving end photoelectric module (not shown), the receiving end photoelectric module includes a receiving end circuit board (not shown), which is integrated on the transmitting end circuit board. A ground capacitance adjustment circuit can be integrated on the receiving end circuit board.

Of course, the installation position and number of the ground capacitance adjustment circuits are not limited to this. may be integrated with one or more ground capacitance regulating circuits, at which time the number of ground capacitance regulating circuits is two or more. It should be understood that when the number of ground capacitance adjustment circuits is two or more, the circuit structure of each ground capacitance adjustment circuit may be the same or different. Based on this, the installation position, number and specific circuit structure of the ground capacitance adjustment circuit are determined according to the actual application scenario, and the embodiments of the present invention are not limited thereto.

In the above HDMI optoelectronic hybrid transmission system according to the embodiment of the present invention, the ground capacitance adjusting circuit is integrated on the transmitting end circuit board and/or the ground capacitance adjusting circuit is integrated on the receiving end circuit board, so that the HDMI optoelectronic hybrid During operation, the transmission system modulates the low frequency control clock signal and/or the low frequency control data signal by means of a ground capacitance conditioning circuit integrated on the transmitting end circuit board and/or a ground capacitance conditioning circuit integrated on the receiving end circuit board. The ground equivalent capacitance value of the signal line can be freely adjusted. As a result, the self-control capability of the HDMI opto-electronic hybrid transmission system with respect to the transmission distance is greatly improved on the premise that the HDMI opto-electronic hybrid transmission system ensures the stability of transmitting the low-frequency control signal.

2 and 3, FIG. 2 is a schematic diagram of the circuit structure of the first equivalent circuit of the ground capacitance adjusting circuit according to the embodiment of the present invention, and FIG. 3 is the ground according to the embodiment of the present invention. FIG. 4 is a circuit structure schematic diagram of a second type equivalent circuit of the capacitance adjustment circuit;

As a possible embodiment, the signal line 300 connecting the transmitting end HDMI 100 and the receiving end HDMI 200 may consist 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. Embodiments of the present invention are not limited to this.

Further, as shown in FIG. 2, the transmitting end HDMI 100 and the receiving end HDMI 200 are correspondingly provided with power pins (A1 and A2), ground pins (D1 and D2) and low-frequency control clock signal pins (B1 and B2). ) may be installed between the two power supply pins A1 and A2, between the two ground pins D1 and D2 and between the two low frequency control clock signal pins B1 and B2 are all copper wires ( 310, 321, 322 and 330).

Based on this, the first equivalent circuit of the ground capacitance adjustment circuit may include a first resistor R1, a second resistor R2, a third resistor R3 and a first capacitor C1, and a first One end of the resistor R1 is connected to the low-frequency control clock signal pin B1 of the transmitting end HDMI 100 by 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 HDMI 200 by 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 HDMI 100, and the other end of the second resistor R2 is connected to two Connected to the copper wire 310 between the 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 HDMI 200 , 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 first resistor R1 and the low frequency control of the receiving end HDMI 200 The other end of the first capacitor C1 may be connected to the copper wire 322 between the clock signal pin B2 and the copper wire 330 between the two ground pins D1 and D2.

Further, as shown in FIG. 3, the transmitter HDMI 100 and the receiver HDMI 200 may be provided with corresponding low-frequency control data signal pins (E1 and E2).

Based on this, the second equivalent circuit of the ground capacitance adjustment circuit may include a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a second capacitor C2, and a fourth One end of the resistor R4 is connected to the low-frequency control data signal pin E1 of the transmitting end HDMI 100 by 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 HDMI 200 by 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 HDMI 100, and the other end of the fifth resistor R5 is connected to two power sources. 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 HDMI 200; 6 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 fourth resistor R4 and the low frequency control data signal pin of the receiving end HDMI 200 E2 and the other end of the second capacitor C2 is connected to the copper wire 330 between the two ground pins D1 and D2.

Of course, the structural form of the equivalent circuit of the ground capacitance adjusting circuit is not limited to the above two types of equivalent circuits. In another embodiment, the structural form of the equivalent circuit of the ground capacitance adjustment circuit may be a simple equivalent circuit (similar to the two types of equivalent circuits shown above) composed of a plurality of simple components, It can be a complex equivalent circuit composed of a chip or MCU microcontroller, such as a complex equivalent circuit composed of a chip with capacity equalization function (such as a P82B96 chip), etc., and the embodiments of the present invention. does not limit this.

Further, when the equivalent circuit of the ground capacitance adjustment circuit in the transmitting end circuit board is a first type equivalent circuit, the equivalent circuit of the ground capacitance adjustment circuit in the receiving end circuit board is a second type equivalent circuit or a first type equivalent circuit. If the equivalent circuit of the ground capacitance adjustment circuit on the transmitting end circuit board is a second type equivalent circuit, the equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is a first type equivalent circuit or the equivalent circuit of the second kind, and the embodiments of the present invention are not limited thereto.

Each embodiment in the content of the present invention will be described step by step, each embodiment will focus on the differences from the other embodiments, and the same or similar features among the embodiments. It should be noted that the parts may refer to each other.

In the context of the present invention, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation and do not necessarily imply that such actual It should also be noted that no relationship or order is required or implied. Furthermore, terms such as "comprising," "including," or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a set of elements includes It includes not only those elements, but also elements not explicitly listed or specific to these processes, methods, articles, or devices. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other such elements in a process, method, article, or apparatus containing that element.

The above description of the disclosed embodiments will enable any person skilled in the art to make or use the teachings of the present invention. Various modifications to these examples will be apparent to those skilled in the art. The general principles defined in the inventive subject matter may be implemented in other embodiments without departing from the spirit or scope of the inventive subject matter. Accordingly, the inventive subject matter is not limited to those embodiments shown in the inventive subject matter, but is intended to accommodate the broadest scope consistent with the principles and novel features disclosed in the inventive subject matter. be.

Claims (5)

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 embedded with a transmitting end optoelectronic module, and the transmitting end optoelectronic module is a transmitting end circuit board; wherein the transmitting end circuit board is integrated with a ground capacitance adjustment circuit; and/or the receiving end HDMI is embedded with a receiving end photoelectric module, the receiving end photoelectric module includes a receiving end circuit board, and the receiving end An HDMI optoelectronic hybrid transmission system, wherein a ground capacitance adjusting circuit is integrated on the end circuit board. 2. The HDMI optoelectronic hybrid transmission system of claim 1, wherein the signal line comprises an optical fiber and a copper wire. The transmitting end HDMI and the receiving end HDMI are respectively provided with a power pin, a ground pin and a low-frequency control clock signal pin, between the two power pins, between the two ground pins and between the two low-frequency pins. all of the control clock signal pins are connected by 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 by 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 by the copper wire. connected to the clock signal pin,
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 two power pins. connected to said copper wire between,
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 two power pins. connected to said copper wire between,
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 two ground pins. 3. The HDMI optoelectronic hybrid transmission system according to claim 2, wherein the HDMI optoelectronic hybrid transmission system is connected to the copper wire between. The transmitting end HDMI and the receiving end HDMI are further provided with corresponding low-frequency control data signal pins, and the second equivalent circuit of the ground capacitance adjustment circuit comprises a fourth resistor, a fifth resistor, a third 6 resistors 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 by the copper wire, and the other end of the fourth resistor is the copper connected to the low frequency control data signal pin of the receiving end HDMI by a line;
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 two power pins. connected to said copper wire between,
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 two power pins. connected to said copper wire between,
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 two ground pins. 4. The HDMI optoelectronic hybrid transmission system according to claim 3, wherein the HDMI optoelectronic hybrid transmission system is connected to the copper wire between. The equivalent circuit of the ground capacitance adjustment circuit on the transmission end circuit board is the first equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the reception end circuit board is the second equivalent circuit, or The equivalent circuit of the ground capacitance adjustment circuit on the transmission end circuit board is the second equivalent circuit, and the equivalent circuit of the ground capacitance adjustment circuit on the reception end circuit board is the first equivalent circuit, or the transmission The equivalent circuit of the ground capacitance adjustment circuit in the end circuit board is the first equivalent circuit, the equivalent circuit of the ground capacitance adjustment circuit in the reception end circuit board is the first equivalent circuit, or the transmission end An equivalent circuit of the ground capacitance adjustment circuit on the circuit board is the second equivalent circuit, and an equivalent circuit of the ground capacitance adjustment circuit on the receiving end circuit board is the second equivalent circuit. 5. The HDMI optoelectronic hybrid transmission system according to item 4.

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