As we all know, optical fiber is much better than the general material in terms of transmission distance, and supports higher transmission rates, so many people will give priority to it when conditions permit. Recently, UGREEN Greenlink has launched an HDMI cable based on optical fiber design to give full play to the advantages of optical fiber.
Its length has reached an astonishing 15 meters, far more than most of the similar wires, not only that, but also to achieve long-distance lossless transmission, support 4K/60Hz video transmission, very suitable for home theater, audio and video entertainment, high-definition video conferencing office, multimedia education and other scenarios.
The charging head network has previously evaluated the cable in detail, and the following continues to disassemble it to see how the interior is designed.
First, the appearance of the green connection multimedia optical fiber cable
The front of the box is printed with the UGREEN brand, product name, exterior drawing and the logo of the adaptable equipment.
The back is printed with product introduction, specifications, application scenarios and information of Shenzhen Greenlink Technology Co., Ltd.
Product Specifications:
The combination core of 4-core fiber + 7-core tinned copper wire is adopted to prevent interference between high-frequency signals;
High quality photoelectric conversion module, ultra-low power consumption ≤ 250mW;
Support 3D imaging, support HDCP1.4/2.2;
Resolution supports up to 3840*2160/60HZ, and supports backward compatibility with 1440P, 1080P, 1080I, 720P;
Support audio backhaul;
The color space supports up to YCBCr 4:4:4, and the color depth is 8bit;
Long-distance lossless transmission;
Open the package, the cable jacket plastic bag protection, to prevent scratches and wear during transportation, there is also an inspection certificate inside.
The cable has been wrapped around a lot, after all, it is 15 meters long and is tied and arranged using two magic cable ties.
The weight is about 313g.
The male head cover is protected by a plastic shell, the cable head shell is made of aluminum alloy and plastic material, gray and black color, and the middle area is designed with HDMI and Source words, indicating that the cable is connected to the video output device.
The other end is designed the same, except that Source turns into a display, signaling to connect to the display. This design is to distinguish the transmission direction. Because the fiber optic cable is directional, there is Source identification to connect one end to the signal source output, such as notebooks, hosts or whatever, and the other end to connect monitors, projectors and other devices.
The other side of the thread is designed with the UGREEN brand.
The HDMI core is made of blue plastic.
The end of the line has to be extended to protect the skin from bending and causing the skin to burst.
The measured end length was 41.17mm.
The width is 19.81mm.
With a thickness of 10.84mm, the plug length is longer than that of a traditional HDMI cable plug due to the built-in fiber optic transceiver circuit.
The diameter of the wire body is 4.13 mm.
Second, the green connection multimedia optical fiber cable disassembly
The aluminum alloy shell at the Source end is cut open, and a small red plate is used inside, and there is a plastic shell isolation between the board and the aluminum alloy shell.
The small plates are fixed with fixed columns, the middle area is wrapped in insulating tape, and the wire core solder joints are injected for protection.
Screws are also used at the end to tighten the fixing core.
On the other side of the small board, the central area is exposed copper, with COB process drivers and VCSEL optoel components, where four optical fibers are connected and covered with microlenses to concentrate light into the fiber.
Four optoelectronic components and driver close-ups.
The display end shell is also cut open, and the internal design is the same as the other end, but the small plate is green to avoid confusion during production.
Close-up of the core connection, from the silk screen printing on the right side of the core and the small series of measurements can be understood:
The blue core function is hot swap detection (HPD), which will serve as the basis for whether the HDMI source (Source) initiates an EDID read and whether it starts sending TMDS signals;
The white core is connected to the SCL pin, and the black wire core is connected to the SDA pin to allow Source (DVD) and Display (TV) to communicate;
Orange core connection reserved pin, unused;
The yellow core realizes the CEC signal connection, allowing the user to control the connected devices on the HDMI interface;
The red core is marked by +5V next to it, indicating that it is a power core;
The green core and the exposed core are connected in one place, and the function is DDC/CEC grounding;
Fiber optic cores are used for the transmission of three pairs of TMDS data and one pair of clock signals.
On the other side of the board, there are also drivers and optoelectronic components for the COB process.
Cut the body of the line.
The core group wraps the tin foil to shield the interference.
The core group is mixed with multiple strands of tensile wire to improve the tensile performance of the cable.
Intercept a wire core, and the official specifications, there are 4 fibers and 7 tinned copper cores, as well as a bare core and 3 tensile wires.
Four fiber optic wires close-up, different colors, jacket insulated plastic layer, for digital signal transmission.
The other 7 core copper wires are tinned for interference resistance, and the black cores are close-up.
Yellow wire core close-up.
Close-up of the red core.
Close-up of the white core.
Close-up of orange core.
Blue wire core close-up.
Close-up of the green core.
Close-up of bare core.
Close-up of the anti-tensile line.
All disassembled, let's take a family portrait.
Charging head net disassembly summary
Greenlink HDMI fiber optic cable has a variety of lengths to choose from, even 50 meters length optional, soft body, thinner wire diameter, moderate weight, greatly facilitate the installation of wiring; support 4K@60Hz video specifications, so that the picture quality, length is no longer limited; support audio and picture simultaneous interpretation, no need for additional wiring. Gold-plated plugs and zinc alloy terminals are standard, and the quality does not need to worry.
The charging head network was found through disassembly, as shown in the packaging specifications, and there are high-quality photoelectric conversion modules at both ends of the cable, and four optical fibers are connected. The remaining 8 cores are tinned and anti-interference, and three tensile wires are added to the cable to improve tensile performance. This HDMI line is based on optical fiber, which can achieve lossless transmission, compared with ordinary copper cable plates, both length and transmission performance have been qualitatively improved, to meet the needs of various high-demand scenarios.