CN201084854Y - Cable structure capable of prolonging HDMI signal transmission distance - Google Patents

Abstract

A cable structure capable of extending the transmission distance of an HDMI signal comprises: a first plug, a cable and a second plug. The first plug is plugged into the HDMI connection port of a display, and the first plug is composed of a circuit board, an HDMI connector and a housing. One end of the cable is electrically connected to the first plug, and the other end is electrically connected to the second plug. When the second plug is plugged into a playback end, and the first plug is plugged into a display, the transmitted HDMI signal is amplified by a signal amplifier on the circuit board and then transmitted to the display, thereby extending the transmission distance of the HDMI signal.

Description

Cable structure that can extend HDMI signal transmission distance

technical field

The utility model relates to a cable, in particular to an HDMI (High-Definition Multimedia Interface, high-definition multimedia transmission interface) signal cable.

Background technique

HDMI is High Definition Multimedia Interface. The HDMI interface can provide data transmission bandwidth up to 5Gbps, and can transmit uncompressed audio signals and high-resolution video signals.

The HDMI interface can obtain high-quality video and audio signal transmission without digital/analog or analog/digital conversion before signal transmission. Using the HDMI interface only requires one HDMI cable to transmit audio and video signals at the same time, unlike the traditional transmission system that requires multiple cables to connect, which greatly simplifies the installation of the home theater system.

The traditional HDMI cable provides a data transmission rate of 5Gbps, and can transmit up to 15 meters. Referring to Fig. 1, if the HDMI signal transmission distance exceeds 15 meters, in order to avoid the HDMI signal attenuation during the transmission process, an adapter 30 must be provided between the two HDMI cables 10 and 20 for switching, through the adapter 30 The internal signal amplifying circuit (REPEATER) amplifies the signal, so that the transmitted HDMI signal can be transmitted over a long distance without causing signal attenuation. However, when the adapter 30 is electrically connected to the two HDMI cables 10, 20, the attenuation of some signals cannot be avoided due to the increase in the number of electrical contacts generated.

Contents of the invention

Therefore, the main purpose of this utility model is to provide a signal amplifying circuit and integrate it with the HDMI cable, thereby reducing the space occupied by the HDMI cable and the adapter, making it convenient for the user to connect the player terminal and the display terminal, and further Reduce the production cost of the signal amplifying circuit and the HDMI cable.

In order to achieve the above purpose, the utility model provides a cable structure capable of extending the transmission distance of HDMI signals, which includes: a first plug, a cable and a second plug. Wherein, the first plug is composed of a circuit board, an HDMI connector and a housing. One side of the circuit board is electrically connected to a plurality of wires inside the cable, and the circuit board is electrically connected to the power supply unit and the display unit. The power supply unit is a power socket and plugged with the power plug of an external transformer to provide power supply. When the display unit is amplified by the HDMI signal, the display unit will be illuminated, thereby showing that the circuit board is working. In addition, the other side of the circuit board is electrically connected to the HDMI connector. After the cable, circuit board and HDMI connector are electrically connected, a housing is covered on the cable, circuit board and HDMI connector, and one end of the HDMI connector, power supply unit and display unit is extended or exposed outside the housing . The other end of the cable is electrically connected to the second plug and has a shell on it, and an HDMI connector extends from one end of the shell.

The utility model reduces the space occupied by the HDMI cable and the adapter, and because the adapter 30 reduces the number of contact points when connecting the HDMI cable, it also avoids the attenuation of some signals at the same time.

Description of drawings

Figure 1 is a schematic diagram of the electrical connection between a traditional HDMI cable and an adapter;

Fig. 2 is an exploded schematic view of the HDMI cable of the present invention;

Fig. 3 is a three-dimensional schematic diagram outside the line of the HDMI cable of the present invention;

Fig. 4 is a schematic diagram of the HDMI connection port of the HDMI cable of the present invention and the display and the player; and,

Fig. 5 is a schematic block diagram of the signal amplifying circuit of the present invention.

Explanation of main component symbols

HDMI cable 10, 20

Adapter 30

First Plug 1 Circuit Board 11

Power supply unit 111 Display unit 112

HDMI connector 12 shell 13

Perforation 131, 132

Cable 2 Conductor 21

Shell 31 HDMI connector 32

Display 4 HDMI connection port 41

Player 5 HDMI connection port 51

voltage stabilizing unit 113 expander 114

Equalizer 115

Detailed ways

Relevant technical content and detailed description of the utility model, now in conjunction with the accompanying drawings are described as follows:

Figures 2 and 3 are three-dimensional schematic diagrams of the disassembly and appearance of the HDMI cable of the present invention. As shown in the figure: the utility model provides a cable structure capable of extending the HDMI signal transmission distance, the cable structure includes: a first plug 1, a cable 2 and a second plug 3; wherein the first plug 1 is plugged into At the HDMI connection port (not shown in the figure) of the playback terminal or the display, the first plug is composed of a circuit board 11, an HDMI connector 12 and a housing 13, and one side of the circuit board 11 is electrically connected to a plurality of wires 21 inside the cable connect. The circuit board 11 is electrically connected to the power unit 111 and the display unit 112 . The power supply unit 111 is a power socket for plugging in a power plug of an external transformer (not shown in the figure), so as to provide the DC power required for the circuit board 11 to work. The display unit 112 is a light emitting diode, and when the circuit of the circuit board 11 (described in detail below) amplifies the HDMI signal, the display unit 112 will be lit, thereby indicating that the circuit board 11 is working. The other side of the circuit board 11 is electrically connected to the HDMI connector 12, and the HDMI connector 12 is plugged into the HDMI connection port of the player or the display. After the above-mentioned cable 2, circuit board 11 and HDMI connector 12 are electrically connected, they are placed in a mold, and plastic or rubber is injected into the mold, and then the cable 2, circuit board 11 and HDMI connector 12 can be packaged. The casing 13 is provided with through holes 131 and 132 on the casing 13 , the through holes 131 and 132 expose the power supply unit 111 and the display unit 112 , and one end of the HDMI connector 12 extends out of the casing 13 .

One end of the cable 2 is electrically connected to the first plug 1 , and the other end is electrically connected to the second plug 3 .

The second plug 3 is electrically connected to the cable 2, and has a housing 31 on it. One end of the housing 31 is extended with an HDMI connector 32, and the HDMI connector 32 is plugged into the HDMI connection port of the player or display.

3 and 4 are schematic diagrams of the three-dimensional appearance of the HDMI cable of the present invention and the HDMI connection ports of the HDMI cable and the display and player. As shown in the figure, when the first plug 1 of the HDMI cable 2 is plugged into the HDMI connection port 41 of the display 4, and the second plug 3 is plugged into the HDMI connection port 51 of the player 5, the HDMI cable 2 is connected to the video and When the audio signal is transmitted, the circuit on the circuit board 11 amplifies the video and audio signal, and then transmits it to the display 4, so that the display 4 displays and plays high-quality video and audio signals.

Fig. 5 is a schematic diagram of a circuit block on a circuit board of the present invention. As shown in the figure, the circuit board 11 has an amplifying HDMI signal circuit, including: a power supply unit 111, a voltage stabilizing unit 113, an expander 114, an equalizer 115 and a display unit 112; wherein,

The power supply unit 111 is a power socket, which is inserted into a power plug of an external transformer (not shown in the figure) to provide DC power.

The voltage stabilizing unit 113 is electrically connected to the power supply unit 111 , and the voltage output by the stabilizing power supply unit 111 is within a certain range.

The extender (EXTENDER) 114 is electrically connected to the voltage stabilizing unit 113 and can provide compensation for cable capacitance up to 3000pF.

The equalizer (EQUALIZER) 115 is electrically connected with the power supply unit 111 and used for frequency compensation. When the frequency is 825MHz, it can provide at most 40dB loss compensation for the TMDS line.

The display unit 112 is electrically connected to the equalizer 115 and displays the working status of the HDMI signal amplifying circuit.

When the signal of the playback terminal 5 is input to the expander 114 and the equalizer 115 , the expander 114 and the equalizer 115 can extend the transmission distance of the HDMI cable to avoid signal attenuation.

The above is only a preferred embodiment of the utility model, and does not therefore limit the patent scope of the utility model. All other equivalent changes or modifications made within the scope of the utility model should be included in the patent of the utility model. within range.

Claims (10)

1. A cable structure capable of extending an HDMI signal transmission distance, comprising:

a cable wire;

the first plug is electrically connected with one end of the cable;

the second plug is electrically connected with the other end of the cable;

the first plug is composed of a circuit board and an HDMI connector, one side of the circuit board is electrically connected with the plurality of wires in the cable, and the other side of the circuit board is electrically connected with the HDMI connector.

2. The cable structure capable of extending the HDMI signal transmission distance according to claim 1, wherein said circuit board is electrically connected to a power supply unit.

3. The cable structure capable of extending the HDMI signal transmission distance according to claim 2, wherein said power supply unit is a power outlet.

4. The cable structure capable of extending the HDMI signal transmission distance according to claim 1, wherein said circuit board is electrically connected to a display unit.

5. The cable structure capable of extending the HDMI signal transmission distance according to claim 4, wherein said display unit is a light emitting diode.

6. The cable structure capable of extending the HDMI signal transmission distance according to claim 1, wherein said HDMI signal amplifying circuit on said circuit board comprises:

a power supply unit for supplying a direct current power;

the voltage stabilizing unit is electrically connected with the power supply unit and stabilizes the voltage output by the power supply unit within a certain range;

the expander is electrically connected with the voltage stabilizing unit and is used for compensating the capacitance of the cable;

the equalizer is electrically connected with the power supply unit and used for frequency compensation; and the number of the first and second groups,

and the display unit is electrically connected with the equalizer and displays the working state of the HDMI signal amplifying circuit.

7. The cable structure capable of extending the HDMI signal transmission distance according to claim 6, wherein said power supply unit is a power outlet.

8. The cable structure capable of extending the HDMI signal transmission distance according to claim 6, wherein said display unit is a light emitting diode.

9. The cable structure capable of extending the HDMI signal transmission distance as claimed in claim 1, wherein a housing is disposed on the cable, the circuit board and the HDMI connector after the cable and the circuit board are electrically connected to the HDMI connector, and one end of the HDMI connector extends to the outside of the housing.

10. The cable structure according to claim 9, wherein the housing has two through holes, so that the power unit and the display unit are exposed.

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