TWM516786U - Structure of transmission line - Google Patents

Description

Transmission line structure

This creation is about a transmission line, especially an audio or video fiber cable that reduces the number of fibers.

According to the technical field of transmission lines such as audio and video transmission lines or data transmission lines, Active Optical Cable (AOC) is more than optical fiber, optical transceiver components and related to conventional passive copper cables. Devices such as driving and amplifying chips have better anti-attenuation, anti-interference performance and long transmission distance. The future application and promotion are quite promising. Among them, the interface specifications of the transmission line include HDMI, DisplayPort (DP) and USB 3. X and so on, please refer to the first figure and the second figure for a conventional HDMI active optical fiber cable 1. It can be noted that the active optical fiber cable shown here has the inside of the optical fiber 15 In addition, a certain number of copper wires 16 are also disposed at the same time for transmitting other electrical signals, so it is also called a hybrid hybrid optical cable. The HDMI active optical fiber cable 1 has a casing 10 and a An electrical connector 11 embedded in the housing 10 and a circuit board 12 disposed inside the housing 10 and electrically connected to the electrical connector 11 and a chip 13 respectively disposed on the circuit board 12 (such as driving, magnifying crystal And an optical engine 14 (also referred to as an optical engine), wherein the optical engine 14 is provided with a VCSEL (Vertical Cavity Surface Emitting Laser) composed of four optical transceiver components. Array or Photo Diode array, respectively Corresponding to and transmitting HDMI TMDS0, TMDS1, TMDS2 clock control signals, the optical engine 14 is coupled with four optical fibers 15 respectively corresponding to the VCSEL array or the photodiode array, and the copper conductor 16 is Electrically connected to the circuit board 12, the optical fibers 15 and the copper wires 16 are typically wrapped in a cable 2.

Please continue to refer to the second figure. The optical engine 14 of the conventional HDMI active fiber optic cable 1 does not have the single-fiber wavelength division multiplexing structure design, so multiple fibers 15 must be used, in addition to increasing the wire cost, and the fiber 15 is also It is easy to entangle with other optical fibers 15 or copper wires 16 to increase the risk of damage. If the protection of the optical fiber 15 is to be strengthened, the overall structure of the cable 2 is more complicated and larger, which reduces the practicability and reliability of the product. In addition, the optical transceiver component array on the optical engine 14 is usually assembled by using a high-precision patch (SMT) device and other packaging devices, and then precisely coupled with the optical fiber 14 to be difficult to process and expensive. Packaging equipment has no advantage in production cost. Therefore, how to improve the above-mentioned defects is the technical difficulty that the creators of this case want to solve.

In view of the existing active optical fiber cable, the optical engine has a high packaging cost, and a plurality of optical fibers must be used together, which increases the cost of the wire and the chance of fiber damage, thereby reducing the practicability and reliability of the product. The aim is to develop a transmission line structure that reduces the number of fibers.

Another object of the present invention is to develop a transmission line structure that can be easily fabricated or applied to a detachable fiber optic cable.

In order to achieve the above object, the present invention provides a transmission line structure, comprising: a connector housing, an electrical connector is fixed on one side of the connector housing; and a circuit board is provided. Placed inside the connector housing; a wave division multiplex optical sub-module disposed inside the connector housing and electrically connected to the circuit board; a cable connected to the other side of the connector housing An optical fiber is disposed in the cable, and the optical fiber is coupled to the optical fiber interface of the wavelength division multiplexing optical sub-module.

With the above structure, the creation can greatly reduce the amount of fiber used in the transmission line, in addition to reducing the cost of the wire, and avoiding the situation where multiple fibers are easily damaged by entanglement, and at the same time, by reducing the number of fibers, It is more conducive to the production and application of detachable fiber optic cable, which enables the creation of the product to significantly reduce product cost and improve product reliability.

[Use]

1‧‧‧HDMI Active Optical Cable

10‧‧‧shell

11‧‧‧Electrical connector

12‧‧‧ boards

13‧‧‧ wafer

14‧‧‧Optical engine

15‧‧‧Fiber

16‧‧‧ copper wire

2‧‧‧ cable

[this creation]

3‧‧‧Connector housing

301‧‧‧Combination Department

4‧‧‧Electrical connector

5‧‧‧Circuit board

6‧‧‧Wavelength multiplex optical sub-module

6a‧‧‧Wavelength multiplex optical engine

61‧‧‧Fiber interface

61a‧‧‧Fiber interface

62‧‧‧Optical transceiver components

62a‧‧‧Optical transceiver components

63‧‧‧WDM filter

7‧‧‧ cable

701‧‧‧Combined Department

71‧‧‧ fiber optic

72‧‧‧ copper wire

The first figure is a schematic diagram of the structure of a conventional HDMI active optical fiber cable.

The second figure is a partially enlarged schematic view of the first figure.

The third picture is a schematic diagram of the structure of the creation.

The fourth picture is a schematic diagram of the structure of the wavelength division multiplexing optical sub-module.

The fifth drawing is a schematic view of a second embodiment of the present creation.

The sixth drawing is a schematic diagram of a third embodiment of the present creation.

Referring to the third figure, the present invention provides a transmission line structure, comprising: a connector housing 3, an electrical connector 4 is fixed on one side of the connector housing 3, and the interface of the electrical connector 4 is matched. HDMI, DisplayPort or USB 3.X specifications (it is worth mentioning that although the USB cable is traditionally used for data transmission, the newer USB 3.1 type C specification has a DisplayPort Alternate Mode, which is FullPort Alternate Mode. HD Or the audio and video data of the image quality of 4K or more, that is, the transmission line of the present invention is an audio-visual transmission line or a data transmission line. In this embodiment, the interface of the electrical connector 4 is represented by an HDMI interface; a circuit board 5, the The circuit board 5 is disposed inside the connector housing 3; a wave division multiplex optical sub-module 6 disposed inside the connector housing 3, and the wavelength division multiplexing optical The sub-module 6 is electrically connected to the circuit board 5 for concentrating the multi-channel optical signals in a single optical fiber line through WDM (Wavelength Division Multiplexing) technology. Please refer to the fourth figure. The wavelength division multiplexing optical sub-module 6 is provided with a fiber optic interface 61 such as a ferrule. The wavelength division multiplexing optical sub-module 6 is provided with at least two optical transceiver components 62 and at least one WDM filter. The sheet 63, wherein the optical transceiver element 62 and the WDM filter 63 are used to implement the wavelength division multiplexing, is a prior art and is not a technical feature of the present invention. For details, refer to the Chinese Patent Publication No. CN204334582U The contents of the optical transceiver of the channel are not here. Herein, the optical transceiver component 62 is specifically a light emitting component (such as a VCSEL) or a light receiving component (such as a photodiode, Photo Diode) having a cap package structure such as a TO-CAN package structure. The number of the optical transceiver components 62 can be adjusted according to the interface specifications of the transmission line. In terms of the HDMI transmission line, the number of the optical transceiver components 62 is four to correspond to the TMDS0, TMDS1, and TMDS2 clocks respectively. Control signal, but for the transmission line of USB 3.X, only two optical transceiver elements 62 are required to receive and transmit in the wavelength division multiplexing optical sub-module 6, and in addition, the optical transmission and reception are theoretically The number of components 62 and WDM filters 63 can be arbitrarily increased and expanded. However, the size and packaging cost of the wavelength division multiplexing optical sub-module 6 are considered in practice, and the number of the optical transceiver components 62 is still 2~. 4 is the best, this quantity limit can still meet the needs of various audio and video or data transmission specifications of this creation, so it will not detract from or affect the original The feasibility of the implementation; a cable 7, the cable 7 is connected, for example, to the other side of the connector housing 3, the cable 7 is provided with an optical fiber 71, and the optical fiber 71 and the wavelength division multiplexing The optical sub-module 6 is coupled to the optical fiber interface 61 for transmitting audio and video or data signals. In addition, the cable 7 may further include at least one copper wire 72 for transmitting other electrical signals, the copper wire 72 and The circuit board 5 is electrically connected, and the number of the copper wires 72 can be adjusted according to actual needs. For example, the HDMI transmission line can include a CEC (Consumer Electronics Control) line, DDC (Display Data Control, Display data control) line and HPD (Hot Plug Detect) line, etc., that is, the transmission line of the present invention can be either an opto-electric hybrid type or a purely optical fiber type; in addition, it can be mentioned that Considering the clock control signal in the HDMI video signal, the bandwidth of the data is actually much smaller than the bandwidth occupied by the signals such as TMDS0~2, so in one feasible embodiment, one optical transceiver component can also be reduced. The number of 62 (that is, the remaining 3), At the same time, a copper wire 72 is added for the transmission of the clock control signal, which can reduce the internal component quantity and packaging cost of the wavelength division multiplexing optical sub-module 6; see the third figure and the fourth As shown in the figure, by the present invention, the wavelength division multiplexing optical sub-module 6 is provided, and the amount of the optical fiber 71 of the transmission line can be greatly reduced, thereby avoiding the situation in which the plurality of optical fibers 15 are easily damaged by the entanglement. The wavelength division multiplexing optical sub-module 6 also has a more mature packaging process and lower packaging equipment cost than the conventional optical engine 14, so that the creation can greatly reduce the product cost and improve the reliability of the product; Referring to the fifth embodiment, a second embodiment of the present invention is shown in which the connector housing 3 and the cable 7 are detachably connected due to the connector housing. The caliber size of the cable 3 is usually larger than the caliber of the cable 7, so that the structural design can facilitate the installation and construction work of the cable 7 for threading, wiring, etc., and the structure can be respectively on the connector housing 3 and the cable 7. The corresponding joint portion 301 and the joint portion 701 are disposed to be realized (for example, a shank and a groove or a hook and a card slot), and the specific detailed structure thereof is well known to those skilled in the art, and will not be described in detail herein. In addition, it is worth noting that compared to the multiple optical fibers 15 of the conventional HDMI active optical cable 1, the present invention creates a detachable active optical cable by simplifying the optical fiber 71 in the cable 7 into one. In time, the precision requirement and process difficulty of coupling and docking the optical fiber 71 and the wavelength division multiplexing optical sub-module 6 can be reduced, thereby greatly reducing the production cost of the product and improving the quality stability of the product; The figure shows a third embodiment of the present invention, in which a wave division multiplex optical engine 6a is provided instead of the wavelength division multiplexing optical sub-module 6, and the wavelength division multiplexing optical engine 6a is internally provided with at least two Optical transmission and reception by optical transceiver elements 62a The array of the components and the at least two WDM filters 63 are still exemplified by the HDM1 transmission line in this embodiment. Therefore, four optical transceiver components 62a are illustrated, and the wavelength division multiplexing optical engine 6a and the conventional optical engine 14 are shown. Actually, it has a similar package structure, and the internal optical transceiver component 62a is also the same as the optical transceiver component of the conventional optical engine 14 (specifically, a VCSEL or a photodiode that does not have a TO-CAN package structure). The main difference from the conventional optical engine 14 is that a WDM filter 63 like a wavelength division multiplexing optical sub-module 6 is internally provided, whereby the wavelength division multiplexing optical engine 6a also requires only one optical fiber interface 61a. The present invention can also realize the function of transmitting a plurality of optical signals by a single optical fiber 71 on the package structure of the conventional optical engine 14, and further, the wavelength division multiplexing of the present embodiment is compared with the wavelength division multiplexing optical secondary module 6. Although the packaging device used in the optical engine 6a is relatively expensive, it can increase the component packaging density, and thus can easily package up to 12 optical transceiver components 62a, thereby greatly improving the application range and applicability of the present invention.

3‧‧‧Connector housing

4‧‧‧Electrical connector

5‧‧‧Circuit board

6‧‧‧Wavelength multiplex optical sub-module

7‧‧‧ cable

71‧‧‧ fiber optic

72‧‧‧ copper wire

Claims (10)

A transmission line structure includes: a connector housing having an electrical connector fixed on one side of the connector housing; a circuit board disposed inside the connector housing; and a wavelength division multiplexing optical sub-module, The wavelength division multiplexing optical sub-module is provided with an optical fiber interface, and the wavelength division multiplexing optical sub-module is provided with at least two optical transceiver components and at least a WDM filter, and the optical transceiver component is provided with a cap package structure; a cable connected to the other side of the connector housing, the cable is provided with an optical fiber, the optical fiber and the wave division The optical sub-module of the optical sub-module is coupled to the optical fiber interface. The transmission line structure according to claim 1, wherein the interface of the electrical connector conforms to the specifications of HDMI, DisplayPort or USB 3.X. The transmission line structure according to claim 1, wherein the number of the optical transceiver elements is 2 to 4. The transmission line structure of claim 1, wherein the cable further comprises at least one copper wire, each of the copper wires being electrically connected to the circuit board. The transmission line structure of claim 1, wherein the cable and the connector housing are detachably connected. A transmission line structure includes: a connector housing having an electrical connector fixed on one side of the connector housing; a circuit board disposed inside the connector housing; and a wave division multiplex optical engine disposed on the Inside the connector housing and electrically connected to the circuit board, the wavelength division multiplexing optical engine is provided with a fiber optic interface, and the wave division is The optical engine is internally provided with an array of optical transceiver components composed of at least two optical transceiver components without a TO-CAN package structure and at least two WDM filters; a cable connected to the connector housing On the other side, an optical fiber is disposed in the cable, and the optical fiber is coupled to the optical fiber interface of the wavelength division multiplexing optical sub-module. The transmission line structure according to claim 6, wherein the interface of the electrical connector conforms to the specifications of HDMI, DisplayPort or USB 3.X. The transmission line structure according to claim 6, wherein the number of the optical transceiver elements is 2 to 12. The transmission line structure of claim 6, wherein the cable further comprises at least one copper wire, each of the copper wires being electrically connected to the circuit board. The transmission line structure of claim 6, wherein the cable and the connector housing are detachably connected.