From the Tiananmen Anti-Japanese War Parade to the Rio Olympic Games, from the World Cup in Brazil to the Voss Forum, "there is always a national event in the big event" has become a general consensus on the display devices of the National Star. Recently, the most influential top summit forum in Asia, the Boao Forum for Asia, was held in a grand forum. The two high-definition LED displays on the forum were particularly eye-catching. People in the industry have asked for a message: "Is the display on the Boao Forum for Asia using the star's device?" In keeping with the truth-seeking news attitude, we have verified through multiple inspections that the LED display on the Boao Forum for Asia is led by the National Star 1515. Small-pitch full-color devices are "exciting"!
meeting venue
The National Star 1515 full-color device has the advantages of high resolution, high contrast and high density. It has a high level of brightness, reliability and clarity, ensuring clear picture and bright colors, and can accurately and accurately convey the meeting screen. And information, help the summit to communicate and communicate in an orderly manner.
The display quality of the display using the National Star 1515 device is clear and delicate.
It is reported that this is the second time that the National Star display device has appeared in the Boao Forum for Asia. For the second consecutive year, boarding the "Boao" international stage is a full affirmation and praise for Guoxing Optoelectronics. Guoxing has once again demonstrated to the world the "sealing" of Chinese LED technology.
2016 Boao Forum for Asia Conference
2017 Boao Forum for Asia Conference
This is an era of the king. At the Boao Forum, the whole world is listening to Chinese voices; in the field of LED display packaging, National Star is also sending the strongest Chinese voice to the world with excellent quality and extreme light efficiency.
The road to seal is the national star!
There are two types of EPON systems: one is a system that uses 2 wavelengths; the other is a system that uses 3 wavelengths.
For a two-wavelength system, its downlink wavelength is 1510 nm to transmit downlink voice, data and digital video services; the uplink wavelength is 1310nm to transmit uplink voice and video on-demand and download data request signals. The two-way transmission rate of this system is 1.25 Gb/s, even if the OBD split ratio is 32, it can transmit 20km.
For the three-wavelength system, in addition to the downlink wavelength of 1510 nm and the uplink wavelength of 1310 nm, a transmission window with a downlink wavelength of 1550 nm (1530 ~ 1565 nm) is added. The new window is used to transmit downlink CATV service or DWDM service. The CATV service can be either an analog video signal or an MPEG-2 digital video signal. When the splitting ratio of this system is 32, it can transmit 18 km.
EPON is located between the business network interface and the user network interface, connected to the business node through SNI, and connected to user equipment through UNI. EPON system is mainly composed of optical line terminal (OLT), optical distribution network (ODN) and optical network unit.
In the EPON system, the OLT is not only a switch or router, but also a multi-service providing platform, which provides optical fiber interfaces for passive optical fiber networks. According to the development trend of Ethernet to metropolitan area network and wide area network, OLT will provide 1 Gb/s and 10 Gb/s Ethernet interfaces. In addition to supporting traditional voice, ordinary telephone lines, and other types of T1/E1 interfaces, the OLT also supports SONET connections at ATM, FR, and OC3/12/48/192 rates. The OLT in the EPON can be configured with multiple optical line cards as required to connect with 16 to 64 ONUs. In EPON, the maximum distance from the OLT to the ONU can reach 20 km. If an optical fiber amplifier (active repeater) is used, the distance can be extended.
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