KR20180076771A - optical guide for active optical cable assemble - Google Patents

optical guide for active optical cable assemble Download PDF

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Publication number
KR20180076771A
KR20180076771A KR1020160181284A KR20160181284A KR20180076771A KR 20180076771 A KR20180076771 A KR 20180076771A KR 1020160181284 A KR1020160181284 A KR 1020160181284A KR 20160181284 A KR20160181284 A KR 20160181284A KR 20180076771 A KR20180076771 A KR 20180076771A
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KR
South Korea
Prior art keywords
optical
optical fiber
optical fibers
alignment grooves
fiber guide
Prior art date
Application number
KR1020160181284A
Other languages
Korean (ko)
Inventor
이주일
장성진
심상원
Original Assignee
주식회사 엔티코아
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Application filed by 주식회사 엔티코아 filed Critical 주식회사 엔티코아
Priority to KR1020160181284A priority Critical patent/KR20180076771A/en
Publication of KR20180076771A publication Critical patent/KR20180076771A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3885—Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

Disclosed is an optical fiber guide of an active optical cable assembly, capable of accommodating a larger number of optical fibers at the same size. According to the present invention, in an optical fiber guide of an active optical cable assembly in which a plurality of optical fibers of an optical cable are arranged to be connected to a printed circuit board including an active device which interconverts an optical signal and an electric signal, a plurality of alignment grooves into which the plurality of optical fibers are respectively inserted are horizontally spaced apart from each other in a body of the optical fiber guide, and the maximum distance is larger in the vertical direction than in the horizontal direction in the cross section of the plurality of alignment grooves.

Description

[0001] The present invention relates to an optical fiber guide for an active optical fiber assembly,

The present invention relates to an optical fiber guide of an active optical fiber assembly capable of accommodating a larger number of optical fibers at the same size.

In general, optical fibers are replacing copper-based connections in many traditional long-haul and metropolitan communications networks for a number of reasons, such as large bandwidth capacity, dielectric characteristics, and the like. As consumers require more bandwidth for consumer electronic devices such as smart phones, laptops, displays, tablets, etc., the use of optical fibers for signal transmission is considered to replace existing copper-based connections for such applications have.

This is because high-speed communication between electronic devices is possible, but very short cable distances such as 1-2 meters are impractical. However, a very long transmission length of several tens of meters can be achieved by using an active optical fiber assembly having optical fiber as a transmission medium. Active fiber optic cable assemblies use electrical connectors to provide compatibility with electrical ports, but they convert electrical signals into optical signals in the connector for optical transmission of signals across the optical fibers between the electrical connectors on the cable ends.

Furthermore, the trend of transition from standard electrical protocols to fully optical-based connections is that the conversion of optical and electrical signals within a connector using existing protocols such as HDMI, USB, MiniDisplay ports, etc., occurs in the first few centimeters of the cable assembly, Will be lagging behind by commercialization of the assembly.

The ability to convert electrical interfaces and protocols into an appropriate bitstream and transmit them accurately to fiber optics and capture and decode them at the receiver end typically includes laser drivers, integrated circuits, clock and data recovery (CDR) ) Devices, trans-impedance amplifiers (TIAs), and suitable electrical circuits in the form of printed circuit board assemblies involving active electrical components.

A typical active type optical cable assembly includes a printed circuit board assembly carrying the above-mentioned active type electrical components, an optical cable connected thereto, and a housing for protecting the optical cable assembly and the connection terminal.

Here, a light guide is provided as a component for connecting the printed circuit board assembly and the optical cable.

The light guide is a component that functions to insert each optical fiber according to the number of optical fibers, that is, the number of channels, in the optical cable and to be connected to the printed circuit board assembly.

However, in the optical fiber guide of the conventional optical fiber assembly according to the related art, holes are formed in the number of channels and each optical fiber is inserted into the holes. Therefore, as the number of channels increases, the pitch between them decreases. Therefore, the pitch between the holes is reduced, so that it is difficult to apply a larger number of channels because the limit is reached in the same size light guide.

Patent Document 10-2015-0018335

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical fiber guide of an active type optical cable assembly capable of applying a larger number of channels to the same size by changing a cross-sectional shape of a hole into which optical fibers are inserted.

According to an aspect of the present invention, there is provided a method of manufacturing an active matrix display device including a plurality of optical fibers arranged in an array so that a plurality of optical fibers of an optical cable are connected to a printed circuit board including an active device for converting an optical signal and an electric signal, In the optical fiber guide of the optical fiber assembly, a plurality of alignment grooves into which the plurality of optical fibers are respectively inserted are horizontally spaced apart from each other in the optical fiber guide body, and a cross section of the plurality of alignment grooves is perpendicular to the horizontal direction The maximum distance can be made larger.

Preferably, the plurality of alignment grooves may have an elliptical or rhombic cross-section.

Preferably, the plurality of alignment grooves may be reduced in cross sectional area from the optical cable toward the printed circuit board.

The optical fiber guide body may be provided with an inspection window for observing whether the plurality of optical fibers are properly inserted into the plurality of alignment grooves.

Preferably, the inspection window may be provided at a position where a portion where the cross-sectional area of the plurality of optical fibers is reduced can be observed.

Preferably, a portion where the cross-sectional area of the plurality of alignment grooves is reduced may be reduced in a tapered form.

Preferably, the shells of the plurality of optical fibers may have different colors.

The present invention as described above has the following effects.

The present invention provides an effect that the cross-section of the alignment grooves for accommodating the optical fiber is made elliptical or rhombic, so that a larger number of channels can be secured even in the same size.

1 is a partial perspective view of an active optical fiber assembly with an optical fiber guide according to the present invention.
2 is a perspective view of an optical fiber guide of an active optical cable assembly according to the present invention.
3 is a front view of an optical fiber guide of an active optical cable assembly according to the present invention.
4 is a sectional view taken along the line AA shown in Fig.
5 is a front view showing an example of an optical fiber inserted into an optical fiber guide of an active type optical cable assembly according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, where a section such as a layer, a film, an area, a plate, or the like is referred to as being "on" another section, it includes not only the case where it is "directly on" another part but also the case where there is another part in between. On the contrary, where a section such as a layer, a film, an area, a plate, etc. is referred to as being "under" another section, this includes not only the case where the section is "directly underneath"

Hereinafter, an optical fiber guide of an active optical cable assembly according to an embodiment of the present invention will be described in detail with reference to the drawings.

1, an optical fiber guide 40 of an active optical fiber assembly according to a first embodiment of the present invention is installed between an optical cable 50 and a printed circuit board 30, and includes a plurality of optical fibers 50 of the optical cable 50 (51) and the printed circuit board (30) are physically and electrically connected to each other.

Referring to FIG. 1, one terminal portion of the HDMI optical cable assembly, which is one of the active optical cable assemblies according to the present invention, is shown.

The optical fiber guide 40 of the active optical cable assembly according to the present invention may be configured such that a plurality of optical fibers 51 of the optical cable 50 are connected to a printed circuit board 30 including an active device for converting an optical signal and an electric signal, And the plurality of optical fibers 51 are arranged and arranged.

The optical cable 50 is connected to one cable in accordance with the number of channels to which the electronic product connector and the terminal 10 are connected.

In the case of a short distance, the optical cable 50 is not practically usable because there is not a large difference in terms of the speed and the capacity in the copper-based cable. However, the development of various electronic products and the amount of information transmitted / received increase exponentially, It is resisting to be competitive even in the connection of the distance of tens of meters.

The optical fiber 50 is separated into a single strand optical fiber 51 from the time when the optical cable 50 enters the case 20. The separated optical fibers 51 are inserted into the optical fiber guide 40 and aligned.

Referring to FIG. 1, the HDMI optical cable assembly includes a terminal portion 10 for electrically connecting the pins of the maintenance body to the front of the HDMI optical cable assembly. An electric component and an optical fiber 51 are disposed inside the terminal portion 10, And a case 20 connected thereto. Since the pins of the terminal unit 10 are physically contacted with the pins of the electronic product connector to be electrically connected to each other, they have the same number. In the past, 4-8 channels are used depending on the type of the optical cable assembly. A much larger number of pins, for example, eight channels or more are installed. In addition, since the number of channels increases by a multiple, when the number of channels is increased in order to transmit a large amount of information, the number of the optical fibers 51 increases sharply when designing the optical cable 50, and the optical fiber guide for accommodating and aligning the optical fibers The alignment grooves are designed so that they can be housed and aligned. Of course, since standard dimensions are fixed, increasing the number is also limited. The present invention has an aspect that can further extend this limitation.

Referring to FIG. 2, the printed circuit board 30 is installed in the case 20, and the printed circuit board 30 includes an active device, which converts an electrical signal into an optical signal on the input side, The optical signal is converted into a battery signal. Accordingly, the printed circuit board 30 must be aligned so that the optical fibers 51 for transmitting signals are connected to the correct positions one by one.

The alignment of the optical fibers 51 is performed by the optical fiber guide 40 according to the present invention. 2, the optical fibers 51 extending along the optical fiber 50 are separated into optical fibers 51. The optical fibers 51 are inserted into the optical fiber guides 40, .

3, a plurality of alignment grooves 42 into which the plurality of optical fibers 51 are inserted are horizontally spaced apart from each other in the optical fiber guide body 41, and the plurality of alignment grooves 42 42 have a larger maximum distance in the vertical direction than the horizontal direction.

Referring to FIG. 3, the plurality of alignment grooves 42 may have an elliptical or rhombic cross-section. The pitch indicated by the distance X between the plurality of alignment grooves 42 shown in FIG. 3 is determined by the standard of the width of the optical fiber guide 40. Therefore, as the number of channels increases, 42) should be increased.

If the width of the optical fiber guide 40 is about 4 mm, eight or more alignment grooves 42 should be formed therebetween. Therefore, if the pitch between the optical fiber guides 40 is drastically reduced to exceed 16 channels, .

3, the end face of the alignment groove 42 is formed in an elliptical shape or a rhomboid shape rather than a circular shape, and the maximum distance in the vertical direction is formed larger than the maximum distance in the horizontal direction. Therefore, the pitch increases as compared with the circular alignment groove, so that the defect rate can be reduced.

Referring to FIG. 4, the plurality of alignment grooves 42 are configured to have a reduced cross-sectional area from the optical cable 50 toward the printed circuit board 30.

The optical fiber 51 is separated into multiple strands from the optical fiber 50 and then processed into a shape as shown in FIG. In other words, the cross-sectional area of the alignment grooves 42 is reduced by several steps. In order to accommodate the optical fibers 51, the alignment grooves 42 are also changed in cross-sectional area.

Referring to FIG. 5, the optical fiber 51 includes a first end 51a, a second end 51b, a third end 51c, and finally a fourth end 51d from an end thereof. Correspondingly, the alignment groove 42 also includes a first end 42a, a second end 42b, a third end 42c, and a fourth end 42d from the end. Here, the fourth stage 42c is larger than the fourth stage 51d of the optical fiber 51.

Also, referring to FIG. 4, the end portions of the plurality of alignment grooves 42 where the cross-sectional area is reduced are reduced in a tapered shape. As a result, the optical fiber 51 can be assembled more accurately and more reliably when the optical fiber 51 is assembled.

2 and 3, the optical fiber guide body 41 is provided with inspection windows 41a and 41b to observe whether the plurality of optical fibers 51 are properly inserted into the plurality of alignment grooves 42, 41b.

At this time, the inspection windows 41a and 41b are provided at positions where the sectional areas of the plurality of optical fibers 51 can be observed.

Here, referring to FIG. 4, the inspection windows 41a and 41b are formed at a position where the cross-sectional area is reduced first and at a position where the cross-sectional area is finally reduced. Inspection through the inspection windows 41a and 41b with water is almost impossible by the naked eye and is performed using a vision apparatus using a microscope apparatus.

In addition, the shells of the plurality of optical fibers 51 have different colors. Therefore, it is easy to check whether the assembly is more clearly made during the inspection.

When the optical fibers 51 are assembled in the alignment grooves 42, the optical fiber guides 40 are inserted and fixed in the connector board 30, and the optical fibers 51 are connected to the printed circuit board 30 As shown in Fig.

Although an HDMI cable is used as an example in this embodiment, the present invention can be applied to optical fiber guides of various optical cable assemblies as described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Terminal 20: Case
30: printed circuit board 40: optical fiber guide
41: body 42: alignment groove
50: optical cable 51: optical fiber

Claims (7)

An optical fiber guide of an active type optical cable assembly in which a plurality of optical fibers of an optical cable are aligned so that a plurality of optical fibers of the optical cable can be connected to a printed circuit board including an active device for converting an optical signal and an electric signal,
A plurality of alignment grooves into which the plurality of optical fibers are respectively inserted are horizontally spaced apart from each other in the optical fiber guide body and a maximum distance in the vertical direction of the plurality of alignment grooves is larger than a horizontal direction The optical fiber guide of the active optical fiber assembly. The method according to claim 1,
Wherein the plurality of alignment grooves have an elliptical or rhomboid cross-section. The method according to claim 1,
Wherein the plurality of alignment grooves are reduced in cross-sectional area from the optical cable toward the printed circuit board in a multistage manner. The method of claim 3,
Wherein the optical fiber guide body is provided with an inspection window for observing whether the plurality of optical fibers are properly inserted into the plurality of alignment grooves. 5. The method of claim 4,
Wherein the inspection window is provided at a position where a portion where the cross-sectional area of the plurality of optical fibers is reduced can be observed. The method of claim 3,
Wherein a portion where the cross-sectional area of the plurality of alignment grooves is reduced is reduced in a tapered shape. 7. The method according to any one of claims 1 to 6,
Wherein the plurality of optical fibers have different colors from each other. ≪ RTI ID = 0.0 > 11. < / RTI >
KR1020160181284A 2016-12-28 2016-12-28 optical guide for active optical cable assemble KR20180076771A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06289236A (en) * 1993-03-31 1994-10-18 Sumitomo Electric Ind Ltd Optical fiber array
KR20010002760A (en) * 1999-06-17 2001-01-15 정선종 Fabrication Method of Multi-fiber array using electro-plating and silicon wafers
KR200310758Y1 (en) * 2003-01-20 2003-04-21 주식회사 비주얼메이커 Optical Connector
KR20130131593A (en) * 2012-05-24 2013-12-04 주식회사 제씨콤 Optical connecting block of optical fiber arrays and manufacturing method thereof
KR20150018335A (en) * 2013-08-07 2015-02-23 선전 더렌 일렉트로닉 컴퍼니., 리미티드. Hdmi cable, hdmi connector and hdmi interface for high definition video/audio playback devices
JP2015200789A (en) * 2014-04-08 2015-11-12 住友電気工業株式会社 optical connection structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06289236A (en) * 1993-03-31 1994-10-18 Sumitomo Electric Ind Ltd Optical fiber array
KR20010002760A (en) * 1999-06-17 2001-01-15 정선종 Fabrication Method of Multi-fiber array using electro-plating and silicon wafers
KR200310758Y1 (en) * 2003-01-20 2003-04-21 주식회사 비주얼메이커 Optical Connector
KR20130131593A (en) * 2012-05-24 2013-12-04 주식회사 제씨콤 Optical connecting block of optical fiber arrays and manufacturing method thereof
KR20150018335A (en) * 2013-08-07 2015-02-23 선전 더렌 일렉트로닉 컴퍼니., 리미티드. Hdmi cable, hdmi connector and hdmi interface for high definition video/audio playback devices
JP2015200789A (en) * 2014-04-08 2015-11-12 住友電気工業株式会社 optical connection structure

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