USB 2.0 provides for a maximum cable length of 5 meters for devices running at Hi Speed (480 Mbit/s). The primary reason for this limit is the maximum allowed round-trip delay of about 1.5 μs. If USB host commands are unanswered by the USB device within the allowed time, the host considers the command lost. When adding USB device response time, delays from the maximum number of hubs added to the delays from connecting cables, the maximum acceptable delay per cable amounts to 26 ns.The USB 2.0 specification requires that cable delay be less than 5.2 ns per meter (192 000 km/s, which is close to the maximum achievable transmission speed for standard copper wire).
USB 2.0 Charger Data Cable, 2.0 USB Adapter, Micro USB 2.0 Cable, 2.0 USB Cable Ningbo Kabling Enterprise Limited , http://www.kablinglancable.com
LED has many advantages such as green environmental protection, energy saving and high efficiency, and long life. Under the double stimulation of national policy support and market interests, the current domestic LED industry has developed rapidly, whether it is a professional LED manufacturer, a traditional lighting enterprise, or the outside world. Capital is swarming into the field of LED lighting. However, compared with the ups and downs of the upstream link, LEDs are still facing multiple challenges in the popularization of the terminal market due to factors such as high price, uneven quality and low consumer awareness.
The three major constraints in the development of the LED market 1. The price of LED lamps ranges from 10 times to dozens of times compared with incandescent lamps and energy-saving lamps. The high price has greatly affected the sales of LEDs in the market.
2, the quality is uneven in the crazy entry of all walks of people and the low-cost vicious competition in the market, the LED industry has a mixed quality, market chaos, affecting the purchase reputation of LED lamps in the hearts of consumers.
3, consumer awareness is not high as a new thing LED lighting, at present, many consumers do not really understand LED lamps, in general, the LED industry awareness is not high, which directly leads to the lack of confidence of many dealers.
Breaking the issue: LED promotion problem Sanwei Liangfang is aiming at the above three difficulties. We believe that LED lighting should fly into ordinary people's homes, and it is necessary to reduce LED product prices and improve product quality through technological innovation, and increase publicity to make more consumption. Learn about LEDs.
1. Breaking the price of LEDs In June of this year, Mulinsen shares once again adjusted the price of some LED bulbs and LEDT8 tubes, and the price adjustment exceeded 40. This is the second round of price adjustment measures implemented by Mulinsen since the beginning of this year. The two price adjustments have reached 70.
With the continuous improvement of LED technology and the continuous decline of cost, the price of LED lighting products has also been declining in recent years, which has overcome the first difficulty for the popularization and application of LED lighting.
2, technological innovation, casting quality quality At present, the LED market is in the Warring States era of princely disputes, the price of LED products is chaotic, and the quality is mixed. Therefore, high-quality, cost-effective LED products have become an urgent need in the market.
This year, Mulinsen shares and the world's leading LED device manufacturer Philips Lumileds formally formed a close partnership through the Philips Lumileds Global Partner Program platform. Philips Lumileds will provide high-quality LED device products based on the high-end positioning of Mulinsen's light source family brand. At the same time, Mulinsen also worked closely with the Taiwan Industrial Technology Research Institute to solve many structural technical problems such as structural design, design, and heat dissipation design of LED lamps.
LED companies represented by Mulinsen continue to strengthen the R&D and innovation of products, provide high-quality LED products to customers through technological innovation and product upgrades, and conform to the trend of new LED light sources entering thousands of households.
3. Strengthen publicity and promote the popularization of LED knowledge to popularize LED lighting knowledge. At present, the government and enterprises have spread the concept of LED to the public through LED exhibitions, experience halls, media reports, etc., to create a good publicity scope, and to rotate the LED industry. Good voice in China. On October 18th, the first LED theme museum in China opened at the Guangdong Science Center. The 10 LED outstanding enterprises represented by Mulinsen Co., Ltd. won the title of Guangdong LED Theme Park Exhibition Base.
