Optical module, installation method, interface, optical fiber transmission line and optical fiber transmission device
Technical Field
The present invention relates to data transmission technologies, and in particular, to an optical module, an interface, an optical fiber transmission line, a multi-channel optical fiber transmission device, and an optical module installation method.
Background
The traditional data transmission line using copper cables as data transmission media is small in data transmission quantity, only supports short-distance transmission and cannot meet the requirements of high-definition and high-speed data transmission.
Optical fibers have been widely used in backbone networks as data transmission media, have large data capacity, and can perform long-distance transmission. However, due to the problems of cost and the like of the optical fiber transmission line, the popularization and application of the optical fiber transmission line in daily life or common families are limited.
Disclosure of Invention
An object of the present invention is to provide an optical module applied to a data transmission line and/or a multi-channel optical fiber transmission device, which can reduce the manufacturing cost of the transmission line.
The invention provides an optical module, comprising: a separate optical transceiver device; optical device positioning means for connecting the separated optical transceiver device to the circuit board; and the optical fiber positioning device is used for respectively aligning the optical fibers to the separated optical transceiver devices.
According to an embodiment of the optical module of the present invention, the optical module further comprises lens means for reflecting and focusing light from the optical fiber to the optical receiving device or reflecting and focusing light from the optical transmitting device into the optical fiber.
According to one embodiment of the optical module of the present invention, the optical transceiver device is connected to the circuit board by a conductive adhesive and a gold wire; and/or
The optical fiber positioning device and the optical fiber are fixed by optical glue.
According to an embodiment of the optical module of the present invention, an optical device positioning apparatus includes:
the circuit board positioning column is used for matching with the positioning hole on the circuit board and positioning the optical device positioning device on the circuit board;
an optical device positioning hole for positioning the separated optical transceiver to the circuit board;
a first positioning hole for assembling the lens device and the optical device positioning device;
the lens device includes:
the first positioning column is used for matching with a first positioning hole on the optical device positioning device to realize the assembly of the optical device positioning device and the lens device;
the second positioning hole is used for assembling the lens device and the optical fiber positioning device;
a lens for focusing the optical path and aligning the optical fiber and/or the optical transceiver device of the corresponding channel;
the optical fiber positioning device includes:
the second positioning column is used for matching with a second positioning hole of the lens device to realize the assembly of the lens device and the optical fiber positioning device;
the optical fiber positioning holes are used for guiding and positioning the optical fibers and respectively aligning the optical fibers to the corresponding optical transceiver devices through the lenses;
the optical fiber fixing platform is a support for placing and fixing the optical fiber, and the shape of the optical fiber fixing platform is not particularly limited.
According to an embodiment of the optical module of the present invention, the optical module further comprises a sealing means for sealing the optical transceiver device, the optical device positioning means, and the optical fiber positioning means.
According to the optical module provided by the invention, the optical transceiver devices are separated, and when one of the optical transceiver devices is unqualified or fails, only the optical transceiver device which fails can be replaced, so that the cost is reduced.
The present invention also provides an interface comprising: a joint; a circuit board connected to the connector; and the optical module is connected with the circuit board.
The present invention also provides an optical fiber transmission line, comprising: an optical fiber; and the above-described interface at the end of the optical fiber.
The invention provides a multi-channel optical fiber transmission device, which comprises an optical fiber positioning device;
the optical fiber positioning device comprises a supporting platform and n optical fiber positioning holes, wherein n is an integer greater than or equal to 2;
the inlet of the optical fiber positioning hole is larger than the outlet of the optical fiber positioning hole.
An embodiment of the multi-channel fiber transmission device according to the invention further comprises: n optical fiber guide grooves aligned with the n optical fiber positioning holes; the n optical fiber guide grooves are arranged at one side far away from the optical fiber positioning hole to form a trapezoid.
According to one embodiment of the multi-channel optical fiber transmission device of the present invention, the optical fiber positioning hole includes a tapered positioning hole located at an entrance side of the optical fiber positioning hole and a circular positioning hole located at an exit side of the optical fiber positioning hole.
According to one embodiment of the multi-channel optical fiber transmission device of the present invention, the gradient of the trapezoid of the fiber guiding groove is 10 to 20 degrees, preferably 15 degrees;
and/or
The inclination of the tapered locating hole is 8 to 16 degrees, preferably 10 degrees.
The invention also provides a multi-channel optical fiber transmission device, which comprises the optical fiber positioning device and a lens/prism device. Wherein the lens/prism arrangement comprises a right-angle prism and two spherical lenses located at the sides of the right-angle prism.
The invention also provides a multi-channel optical fiber transmission device, which comprises the optical device positioning device, the optical fiber positioning device and the lens/prism device.
Another object of the present invention is to provide an optical module mounting method, which can effectively position a separated optical transceiver device on a circuit board.
The invention provides an optical module installation method, which comprises the following steps:
connecting the separated optical transceiver to the circuit board by the optical device positioning device;
the optical fiber is aligned to the separated optical transceiver device by the optical fiber positioning device.
According to one embodiment of the installation method of the present invention, aligning an optical fiber to a separate optical transceiver device by an optical fiber positioning device comprises:
combining a lens device with an optical device positioning device, combining an optical fiber positioning device with the lens device, and aligning the optical fiber to the separated optical transceiver device through the lens device;
or,
the optical device positioning device and the optical fiber positioning device are combined, and the optical fiber is directly aligned to the separated optical transceiver.
According to one embodiment of the mounting method of the present invention, connecting the separated optical transceiver device to the circuit board by the optical device positioning means comprises:
securing the optical transceiver device to the optical device positioning apparatus, the optical transceiver device being electrically connected to the circuit board by a separate optical device positioning apparatus;
or,
the optical device positioning device is combined with the circuit board, and the separated optical transceiver is positioned to the appointed position of the circuit board through the optical device positioning device, so that the separated optical transceiver is electrically connected with the circuit board.
According to an embodiment of the installation method of the invention, the method further comprises:
the optical transceiver is connected with the circuit board through conductive adhesive and gold wires;
and/or
And fixing the optical fiber positioning device and the optical fiber by using optical glue.
According to the optical module mounting method provided by the invention, the optical transceiver is placed at the appointed position of the circuit board through the optical device positioning device, so that the separated optical transceiver is effectively positioned on the circuit board.
Furthermore, the device is connected with the circuit board by using the conductive adhesive and the gold thread, so that the distance from the light receiving and transmitting device to the chip is effectively shortened, the normal transmission of high-speed signals is ensured, the production flow is simplified, and the cost is saved.
Drawings
FIG. 1 shows a schematic diagram of one embodiment of an interface of the present invention;
FIG. 2 shows a block diagram of one embodiment of an optical device positioning apparatus of the present invention;
FIG. 3 shows a block diagram of one embodiment of a lens apparatus of the present invention;
FIG. 4 shows a block diagram of one embodiment of a fiber positioning device of the present invention;
FIG. 5 shows a schematic diagram of another embodiment of an interface of the present invention;
FIG. 6 is a flow chart illustrating one embodiment of an optical module mounting method of the present invention
Fig. 7 shows a flowchart of another embodiment of an HDMI interface mounting method of the present invention;
fig. 8 shows a schematic diagram of the flow shown in fig. 7.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. In the drawings, the same reference numerals denote the same or similar components or elements.
One basic idea of the present disclosure is to connect a separate optical transceiver to a circuit board by an optical device positioning apparatus, and to achieve optical fiber alignment of the separate optical transceiver by an optical fiber positioning apparatus. The installation of the separated optical transceiver is realized through the positioning device, and the installation and the use are convenient.
Herein, the optical transceiver device may be an optical receiver device, an optical transmitter device, or include both an optical receiver device and an optical transmitter device.
Specific embodiments of the invention are specifically illustrated or described below.
FIG. 1 shows a schematic diagram of one embodiment of an interface of the present invention. As shown in fig. 1, the interface comprises a connector 1, a circuit board 2, an optical fiber 3, an optical device positioning device 4, a lens device 5, an optical fiber positioning device 6, and an optical transceiver device (not shown in fig. 1). The connector 1 is, for example, an HDMI (High Definition Multimedia Interface) connector, a VAG (Video Address Generator) connector, a dp (display port) or DVI (digital visual Interface) connector, or other various connectors. Examples of the optical transceiver device include an LD (Laser Diode), a PD (Photo Diode), a Vcsel (Vertical-Cavity Surface-Emitting Laser), and an LED (Light Emitting Diode). The connector 1 is connected with the circuit board 2, the optical device positioning device 4 positions the separated optical transceiver device on the circuit board 2, and the lens device 5 is respectively connected with the optical device positioning device 4 and the optical fiber positioning device 6, and reflects and converges the light from the optical fiber 3 to the optical transceiver device, or reflects and converges the light from the optical transceiver device to the optical fiber 3; the optical fiber positioning device 6 separates the optical fibers 3 and aligns the separated optical transceivers, respectively, via the lens device 5.
It should be noted that, in the above embodiments, the optical transceiver devices are separated, which may mean that each optical transceiver device is separated, or one or more optical transceiver devices may form a group, and the groups are separated from each other.
In the prior art, a plurality of optical transceiver devices are generally integrated together to form an optical transceiver device component. However, either during manufacture or use, failure of any one of the optical transceiver components necessitates replacement of the entire optical transceiver component, thereby greatly increasing production and use costs. In the embodiment, the optical transceiver devices are separated, not all the optical transceiver devices are integrated together as usual in the prior art, and when one of the optical transceiver devices is unqualified or fails, only the failed optical transceiver device can be replaced, so that the yield is improved, the production cost is reduced, and the use and maintenance cost is reduced.
Fig. 2 is a block diagram of an embodiment of the optical device positioning apparatus of the present invention, in which fig. 2 (a) is a perspective view of the embodiment of the optical device positioning apparatus, and fig. 2 (b) is a front view of the embodiment of the optical device positioning apparatus. As shown in fig. 2, the optical device positioning apparatus includes an optical device positioning hole 21, a circuit board positioning post 22, and a first positioning hole 23. The circuit board positioning posts 22 mate with the circuit board positioning holes to position the optical device positioning apparatus on the circuit board. The optical device positioning hole 21 is used for positioning the optical transceiver device (wafer) on the circuit board to position the optical transceiver device to the circuit board. The first positioning hole 23 is used for assembly of the lens arrangement with the optics positioning device 21.
Fig. 3 is a structural view showing an embodiment of the lens apparatus of the present invention, in which fig. 3a is a perspective view showing the embodiment of the lens apparatus, fig. 3b is a front view showing the embodiment of the lens apparatus, and fig. 3c is a side view showing the embodiment of the lens apparatus. As shown in fig. 3, the lens device includes a first positioning column 31, a second positioning hole 32, and a lens 33. The lens 33 is, for example, a glass lens or a plastic lens. The first positioning column 31 is matched with the first positioning hole 23 on the optical device positioning device, so that the optical device positioning device and the lens device are assembled. The second positioning hole 32 is used for assembling the lens device and the optical fiber positioning device. The lens 33 is used for optical path focusing and alignment. The main function of the lens device is to focus and guide the light path. For example, the LENS at TX (transmission) end focuses light emitted from a light emitting element and then reflects the light through 90 ° into an optical fiber, and the optical path is guided into a light receiving device at RX (reception) end. The design effectively increases the transmission efficiency of the optical path, reduces the thickness of the product and reduces the occupied space of the product. Fig. 3(d) shows a specific structure of the lens/prism. The lens/prism arrangement includes a right angle prism; the lower spherical lens is used for converging light beams, the 45-degree prism surface is used for 90-degree conversion of the light beam direction, and the upper spherical lens is used for converging light beams. A lens/prism is fitted with the optical fiber positioning device and a lens/prism is fitted with the optical transmitter/optical receiver.
The transmission path of the optical path of the invention is as follows:
the light emitter emits laser, a laser beam passes through the lower spherical lens shown in the figure 3(d), reaches a 45-degree surface of the prism in the focusing process, is turned by 90 degrees and then reaches the upper spherical lens shown in the figure 3(d), the laser beam enters an optical fiber fixed by the multi-light-path optical fiber transmission device after being focused by the spherical lens, enters the upper spherical lens of the lens/prism of the receiving end after passing through the optical fiber, reaches the 45-degree surface of the prism in the focusing process, reaches the lower spherical lens after being turned by 90 degrees, and reaches the light receiver after being focused by the spherical lens.
Reference examples are:
the signal transmitting end sends a signal to a product HDMI interface, the signal is converted into a current signal capable of driving the light emitter through a laser driver, the light emitter emits laser, a laser beam passes through a lower spherical lens shown in figure 3(d), reaches a 45-degree surface of a prism in the focusing process, turns 90 degrees to reach an upper spherical lens shown in figure 3(d), the laser beam enters an optical fiber fixed by a multi-path optical fiber transmission device after being focused through the spherical lens, enters an upper spherical lens of a receiving end lens/prism after passing through the optical fiber, reaches the 45-degree surface of the prism in the focusing process, turns 90 degrees to reach the lower spherical lens, reaches an optical receiver after being focused through the spherical lens, an amplifier amplifies the signal received by the optical receiver, and the signal is transmitted to a signal receiving end through the product HDMI interface.
FIG. 4 shows a block diagram of one embodiment of the optical fiber positioning device of the present invention, wherein FIG. 4a shows a perspective view of the embodiment of the optical fiber positioning device and FIG. 4b shows a front view of the embodiment of the optical fiber positioning device. As shown in fig. 4, the optical fiber positioning device includes a second positioning column 41, an optical fiber positioning hole 42, and an optical fiber fixing platform 43 (a supporting platform). The second positioning post 41 is matched with the second positioning hole 32 of the lens device to realize the assembly of the lens device and the optical fiber positioning device. The optical fiber positioning holes 42 are used for guiding and positioning the optical fibers, and the optical fibers are respectively aligned to the separated optical transceiver devices through the lenses. The fiber holding platform 43 is used to place and hold the optical fiber. For example, the optical fiber positioning device can separate, position and extend the optical fibers in parallel, and use optical glue to fix the optical fibers to the optical fiber fixing platform 43 of the optical fiber positioning device after the optical fibers pass through the optical fiber positioning device. FIG. 4c shows a perspective view of an embodiment of the fiber positioning device. As shown in fig. 4c, the optical fiber positioning device includes n optical fiber positioning holes (6 are shown in the figure), where n is an integer greater than or equal to 2; n is preferably 2 to 20, or preferably 4 to 12. The inlet of the optical fiber positioning hole is larger than the outlet of the optical fiber positioning hole, so that the optical fiber is convenient to install. In the embodiment of FIG. 4c, the fiber alignment hole includes two portions, a tapered alignment hole on the entrance side of the fiber alignment hole and a circular alignment hole on the exit side of the fiber alignment hole. (e.g., 126um) circular alignment holes are used for fiber alignment, tapered alignment holes are used for fiber guidance into the circular alignment holes, and the tapered alignment holes may be selected from 8-16 degrees, preferably 10 degrees. Also shown in FIG. 4c are n fiber guiding grooves that align with the fiber positioning holes; the number of the optical fiber guide grooves corresponds to the number of the optical fiber positioning holes. The optical fiber guiding grooves are arranged in a trapezoid shape at one side far away from the optical fiber positioning hole. The trapezoidal optical fiber guiding groove is used for primarily guiding the optical fiber to the conical positioning hole, and the gradient can be 10-20 degrees, preferably 15 degrees. The optical fiber guiding grooves are arranged in a trapezoidal shape at the inlet side, so that the optical fibers can accurately enter the optical fiber positioning holes.
The fiber positioning device is fitted with an optical lens/prism and also with a light emitter/light receiver.
It will be appreciated by those skilled in the art that the above embodiments are provided with interchangeable pairs of positioning holes and positioning posts, such as the first positioning post of the lens device and the first positioning hole of the optical device positioning device, to achieve the objectives of the present invention. Furthermore, the above embodiments only provide one positioning implementation, and those skilled in the art can implement other positioning implementations according to the teachings of the present invention, such as integrating the optical device positioning device and the lens device to form a seal of the circuit board surface.
In the above embodiment, the optical assembly devices such as the optical device positioning device, the lens device, the optical fiber positioning device, and the like have simple design, and can transmit data only by being combined, so that the optical assembly device is convenient to use.
Fig. 5 shows a schematic diagram of another embodiment of the interface of the present invention, wherein fig. 5(a) shows a perspective view of an embodiment of the interface, and fig. 5(b) shows a detailed perspective view of an optical device positioning apparatus in an embodiment of the interface. As shown in fig. 5(a), the interface includes the connector 1, the circuit board 2, the optical fiber 3, the optical device positioning means 54, the optical fiber positioning means 56, and does not include the lens means. The optical device positioning device 54 connects the separate optical transceiver device 57 to the circuit board 2 and the optical fiber positioning device 56 directly aligns the optical fiber 3 with the optical transceiver device 57 connected to the circuit board 2 through the optical device positioning device 54. As shown in fig. 5(b), the optical device positioning apparatus 54 includes a PIN (PIN)542, a PIN end 541, and a positioning hole 543. The optical transceiver 57 is fixed at the front end of the optical device positioning apparatus 54, and the positive and negative electrodes of the optical transceiver 57 (e.g., LD, PD, etc.) are connected to the protruding (e.g., copper) pins 542 by means of gold bonding; the positioning hole 543 is matched with the positioning post of the optical fiber positioning device 56 to complete the assembly of the optical device positioning device 54 and the optical fiber positioning device 56. The pin ends 541 at the rear of the optics positioner are connected to the circuit board, for example by soldering, to effect connection of the optics positioner 54 to the circuit board 2, thereby connecting the optical transceiver 57 to the circuit board 2.
According to one embodiment of the present invention, the exterior of the optical module is sealed with a sealing device (e.g., a hermetic member) to effectively protect the optical transceiver device, lens, optical fiber terminal, etc. from external dust. In one embodiment, multiple paths of optical fiber transmission are adopted, so that the data bandwidth is further improved, and the product upgrading space is increased.
FIG. 6 illustrates a flow chart of one embodiment of an optical module mounting method of the present invention.
As shown in fig. 6, at step 602, an optical transceiver device is connected to a circuit board by an optical device positioning apparatus. For example, the optical transceiver is fixed to the optical device positioning means, and the optical transceiver is electrically connected to the circuit board through the optical device positioning means; or, the optical device positioning device is combined with the circuit board, and the separated optical transceiver is positioned to the specified position of the circuit board through the optical device positioning hole of the optical device positioning device, so that the optical transceiver is electrically connected with the circuit board. The optical transceiver device may be connected to the circuit board using conductive paste or gold wire.
At step 606, the optical fiber is aligned with the optical transceiver device by the optical fiber positioning device. The optical transceiver device may be directly aligned with the optical fiber or indirectly aligned with the optical fiber after passing through a light refracting or reflecting means, such as a lens means. For example, combining the lens device with the optical device positioning device, assembling the optical fiber positioning device with the lens device, and aligning the optical fiber with the separated optical transceiver device through the lens device.
In the above embodiment, the CHIP ON BOARD manufacturing method is adopted, and the DB (Die Bonding) device is used to place the optical transceiver device at the specified position ON the circuit BOARD, so that the separated optical transceiver device is effectively positioned ON the circuit BOARD. The device is connected with the circuit board by using the conductive adhesive and the gold thread, and the manufacturing mode not only effectively shortens the distance from the transmitting and receiving optical device to the chip, ensures the normal transmission of high-speed signals, but also simplifies the production flow and saves the cost.
Fig. 7 shows a flowchart of an embodiment of an HDMI interface installation method of the present invention, and fig. 8a to 8f show schematic diagrams of respective steps in the flowchart shown in fig. 7.
As shown in fig. 7, at step 702, PCBA (Printed circuit Board Assembly) and HDMI connector Assembly is performed (fig. 8 a).
At step 704, a positioning pedestal (optics positioning device) is combined with the PCBA. The positioning base is used for positioning the optical transceiver and the circuit board in a combined mode. The circuit board with the positioning base is sent into an automatic DB device for placing the optical transceiver, and the DB device places the optical transceiver at an arbitrarily set position according to the positioning hole of the positioning base (figure 8 b).
At step 706, DB, WB (Wire Bonding) optical transceiver devices are bonded on the PCBA (fig. 8 c).
At step 708, the lens device is bonded to a positioning base (FIG. 8 d).
At step 710, the fiber is assembled with an MT (Mating Terminal, combination splice) and trimmed (clear) before being combined with a lens device (FIG. 8 e).
At step 712, the housing is assembled (fig. 8 f).
In one embodiment of the invention, when the RX (receiving) end cannot receive the TX (transmitting) end power supply, the RX end power supply is performed by using a matched USB-to-DC power line. In one embodiment of the invention, the shell is designed by ultrasonic lamination, thereby effectively preventing dust from entering an internal circuit and ensuring the attractive appearance. In one embodiment of the present invention, the optical fiber used is a fully transparent multi-path (e.g., four-path, six-path, eight-path, etc.) array optical fiber design, which is light, beautiful and more suitable for home use.
It should be noted that the optical module provided by the present invention can be applied to various interfaces and data transmission lines, such as HDMI, VAG, DP, DVI, etc., and the present invention does not limit the type of the interface and the connector of the optical fiber transmission line to which the optical module is applied.
The all-fiber high-definition high-speed transmission line (such as an HDMI all-fiber high-definition high-speed transmission line) breaks through the traditional mode of using a copper cable to transmit data, high-speed signals are brought into optical fibers to be transmitted, so that real high definition and high speed are realized, the bottleneck that the copper cable can only transmit in short distance is further solved, and long-distance transmission of the high-definition signals is realized. The all-fiber high-definition high-speed transmission line provided by the invention is beautiful, small and exquisite, is convenient to use, is not only suitable for common families, but also is suitable for the transmission requirements of long-distance high-definition signals such as large-screen high-definition display, video monitoring, outfield shooting and the like.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.