LED backlight LCD TV as a breakthrough in the flat-panel TV industry, the industry is unanimously optimistic. In 2008, Samsung took the lead in releasing the world's largest 70-inch LED LCD TV. Subsequently, the 750, 850, and 950 series LCD TV products launched successively adopted LED backlight technology. Hisense was the first domestically-produced enterprise that launched LED backlight LCD TV products in China. Production of China's first large-size LED backlight module production line, and the annual output of 1.5 million LED backlight modules. It is foreseeable that LED technology will become a new milestone in the development of the flat panel TV industry. Lu Jianbo, a well-known home appliance expert, believes that LED backlights have obvious advantages. As a replacement display technology product, there will definitely be popularization. In 2009, with the large flat panel display companies involved in large-size LED backlights, Introducing new LED backlights. Various market agencies have predicted that the next five years will be a critical period for the development of large-size backlights.
According to the High-tech LED Industry Research Institute (GLII), LED backlights are expected to boost the demand for LED chips in 2010, especially LED-backlit LCD TVs will create a large demand. If the LED backlight chip can achieve higher luminous efficiency before the end of this year, thereby reducing the amount of LED particles used and adjusting the number of LED strips, it is expected to accelerate the popularity of LED backlight applications in the future.
According to the general rule of the consumer electronics industry, when the price of an alternative product reaches 1.3-1.5 times the price of the replaced product, an alternative product such as an LED LCD TV will enter a period of rapid growth.
According to GLII statistics, the overall sales volume of China's LCD TV market in 2009 was 21.668 million units, an increase of 80.5% over 2008, and a total of 450,000 LED sales were achieved. The LED-backlit LCD TV has a penetration rate of 2%.
In 2010, under the influence of a series of policies to expand domestic demand, such as home appliances to the countryside and old-for-new, the domestic LCD TV market accelerated. It is estimated that by the end of 2010, China's LCD TV retail market sales will exceed 35 million units, of which LED backlight LCD TV retail sales will reach 4 million units, an increase of 780% compared with 2009. LED-backlit LCD TV penetration will exceed 11%.
In 2010, global LED-backlit LCD TV shipments are expected to reach 35 million units, accounting for 20% of global LCD TVs. Compared with 3.6 million units in 2009, it increased by 870%. For each LED LCD TV, 580 LEDs are needed to calculate. It is estimated that the demand for LED backlights in 2010 will be about 20 billion.
The high-growth large-size backlight market has brought business opportunities to LED manufacturers. But at the same time, whether the supply of LED chips and devices can keep up with the rapid growth of demand has become a market worry. From the first half of this year, the shortage of LED chips is not unrelated to the backlight. In the face of the tempting backlight market, major TV manufacturers have tried to extend upstream. The most typical example in this regard is the Korean manufacturer LG. According to GLII data, LG, the world's second-largest LCD TV manufacturer, expects its LED-backlit TV to ship 6.5 million units this year, accounting for 20% of its total revenue. This figure will increase to 45% by 2011. The high demand for LED-backlit TVs has put a lot of pressure on the supply of upstream LED chips. In order to ensure sufficient LED chip supply, LG has announced that it will invest in LED construction in Jiangsu with LED packaging factory Yiguang Electronics and Taiwan LCD TV manufacturer Ruixuan Technology. Packaging factory. In addition, LG's subsidiary LG Innotek has also increased the production capacity of LED chips. LG Innotek has purchased 50 MOCVD (metal organic compound chemical vapor deposition) equipment in 2009, and is expected to add another 50 units this year.
Domestic TV manufacturers are also in a crucial period of grabbing the market share of LED-backlit TVs. Hisense has announced that it will raise funds to build five integrated LCD module production lines. At the same time, independent research and development of LED backlights continues. It is also known that Skyworth and Konka are also investing in LED packaging companies to ensure the supply of upstream parts. In the beginning of 2009, Konka began to screen LED packaging factories nationwide. Finally, Ruifeng was selected. It invested tens of millions of yuan to become the second largest shareholder of Ruifeng, and the upper level of Konka highly recognized the development direction of Ruifeng LED industry. Ruifeng Optoelectronics' overall sales exceeded 200 million yuan last year. Its scale and technology rank among the top in the domestic SMD LED packaging industry. In terms of large-size backlights in LEDs, Ruifeng is one of the best high-quality device suppliers in China. The only LED device packaging company in China that successfully produced mass production. In 2009, the company achieved sales of 75.22 KK in medium and large size LCD backlights, sales revenue of approximately RMB 2014, and gross profit margin of over 40%. In the first half of 2010, the company has achieved a production capacity of 96 KK and a sales income of approximately 19.7 million. In the national semiconductor lighting engineering R&D and industry alliance (CSA) domestic large and medium-sized LED backlight device segment market segment, Ruifeng photo potential ranks first in the domestic market. . It has successfully solved the "metachromatic" phenomenon, ensuring the color stability and consistency of the final product, as well as the full range of product development capabilities with high reliability, while including the overall liquid crystal module in the color gamut coverage control technology. Transmissive and LED development technology. In addition, domestic appliance companies have been involved in the research and development and production of large and medium-sized LED backlights, such as Hisense, TCL, Skyworth, etc. However, most enterprises are still in the stage of production line construction, and still rely heavily on imports.
GLII's LED backlight market research report for the first half of this year pointed out that the penetration rate of LED backlights in medium and large LCD TVs in the first quarter of this year has reached 9%. In the face of the fast-growing LED backlight market, in order to develop large-size LED backlights, it is necessary to strengthen the linkage effect between TV manufacturers and LED chips and packages. If the whole machine and the LED industry are separated, China's LED backlight industry will be difficult to do, and LED-backlit TV will have no market share and competitiveness.
First, Wireless Router
So what is a wireless router?
Wireless router, according to the definition of Baidu Encyclopedia: Wireless router is used for users to access the Internet, with wireless coverage of the router.
A wireless router can be thought of as a repeater that forwards the broadband network signal from the wall of your home through an antenna to nearby wireless network devices (laptops, Wifi-enabled phones, tablets, and all Wifi-enabled devices).
The popular wireless routers in the market generally support four access methods: dedicated xdsl/cable, dynamic xdsl, pptp, and generally can only support 15 to 20 devices online at the same time. It also has some other network management functions, such as dhcp service, nat firewall, mac address filtering, dynamic domain name and so on. The signal range of the general wireless router is 50 meters radius, and the signal range of some wireless routers has reached 300 meters radius.
The name of wireless router can be separated out of two keywords: wireless and routing.
Understand the technical principle behind these two words, you understand the wireless router.
Wireless is also what we often call Wi-Fi. Wireless routers can convert home broadband from wired to wireless signals, and all devices can happily surf the Internet as long as they connect to their own Wi-Fi. In addition, these devices also form a wireless local area network, where local data is exchanged at high speed and is not limited by the bandwidth of home broadband.
For example, many people have smart speakers in their homes that can be used to control various smart appliances. When you say small X small X, turn on the TV, the speaker actually finds the TV through the LAN and sends instructions, and does not need to connect to the Internet; And if you let it broadcast news, you have to get data through the Internet.
The Local Area Network we talked about earlier, also known as the Intranet, is represented by the Local Area Network (LAN) on the router, so the Wi-Fi signal is also called WLAN(Wireless LAN); The Internet we want to access, also known as the extranet, is represented on the router by the WAN(Wide Area Network).
On the Intranet, the IP address of each device is different, which is called a private address. All devices on the Internet share the same public address, which is assigned by broadband operators such as China Telecom Unicom.
The router is the bridge between the Intranet and the external network. The above mentioned IP address translation, packet forwarding, is the router routing function. In other words, the router is the hub of the home network, and the data of all the devices must be forwarded through it to access each other or reach the external network, which means that one husband is the key and ten thousand men are not open, so the comprehensive router is also called "home gateway".
Second, the demand for wireless routers
I do not know if there is a sudden WIFI break when you play games at home, and a stable router is crucial at this time. However, it is important to note that your WIFI frequently dropped may not be a problem with the router, it may also be a problem with the carrier network. (Router means I don't back this pot)
In fact, for most people, there are two basic requirements for wireless routers
Stable and do not drop
Fast Internet and easy setup
Some people will have some advanced needs:
There are some features, USB interface, can be external U disk or hard disk, can achieve simple nas functions, QOS, etc., to advertising and so on
Mesh networking, when the house area is large, multiple routers can be used for Mesh networking
How to choose a wireless router
The wireless router market is in the transition stage from WiFi 5 to WiFi 6, if you want to buy the first choice is definitely WiFi 6 wireless router, which is the future trend.
The speed of WiFi 6 is nearly 40% higher than the previous generation 802.11ac, and the highest connection speed can even reach 9.6Gbps, while the highest speed of 802.11ac is only 6.93Gbp. More importantly, unlike 802.11ac, which only covers the 5GHz band, WiFi 6 covers 2.4GHz and 5GHz. Although the 5GHz band has less interference, it has weak wall penetration ability, and the 2.4GHz band has strong wall penetration ability, which takes into account each other.
So why choose a WIFI6 router?
Compared with the previous generation of 802.11ac WiFi 5, the maximum transmission rate of WiFi 6 in the 5Ghz band has been increased from 3.5Gbps to 9.6Gbps, and the theoretical speed has been increased by nearly 3 times. WiFi 6's 5Ghz single-stream 80Mhz bandwidth can reach theoretical speeds of up to 1201Mbps and 160Mhz bandwidth of up to 2402Mbps.
The band supports 2.4Ghz and 5Ghz.
In terms of modulation mode, WiFi6 supports 1024-QAM, which is higher than the 256-QAM of WiFi 5, and the data capacity is higher. Some high-end WiFi 6 routers support 4096-QAM.
WiFi6 supports MU-MIMO (multi-user multiple-input multiple-output) technology, and supports both upstream and downstream MU-MIMO, with a maximum support of 8T×8R MU-MIMO. The speed is greatly improved. High concurrency, WiFi6 5GHz band, terminal connections up to 128! 5 times that of WiFi5. Effectively solve the Internet needs of multi-person networking and smart home;
WiFi6 adopts OFDMA (orthogonal frequency division multiple access) technology. After using OFDM to parent the channel, the transmission technology of transmitting data is loaded on the subcarrier, allowing different users to share the same channel, allowing more devices to access, with shorter response time and lower delay.
Low latency, WiFi6 time delay can be as low as 10ms, compared to WiFi5 30ms delay, only 1/3. This performance refresh is extremely friendly to game lovers;
If WiFi6 (wireless router) devices need to be certified by the WiFi Alliance, they must use the WPA 3 security protocol, which is more secure.
The WiFi6 wireless router is backward compatible with WiFi5 and WiFi4 terminals.
Fourth, the misunderstanding of purchasing routers
Is the through-wall router really through-wall?
Mistake; The country has strict limits on the transmission power of the wireless router antenna, if you have a lot of rooms in your home, and there are many walls between them, even if you buy an expensive wireless router, you can not do one to cover all the room signals. If the signal is not good, you can consider multiple wireless router Mesh networking.
Does a wireless router have a stronger signal with more antennas?
More antennas just to match the X*X MIMO mode, the more antennas, the more channels, can only ensure that the network is more stable, the impact on the signal is little, the strength of the signal is only related to the wireless transmission power. The wireless transmission power of the country has a standard.
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