In the first half of 2012, the overall scale of China's LED indoor lighting market increased significantly, with a year-on-year increase of nearly 36%. Among them, more than 50% of the market expansion was contributed by the addition of LED indoor lighting.
According to a survey conducted by the High-tech LED Industry Research Institute, since the first half of 2011, the number of new LED indoor lighting companies has increased to nearly 1,800. Among them, nearly 1,000 new LED indoor lighting companies were added in the first half of this year.
In the first half of the year, the average price of LED indoor lighting products dropped by about 10%. The main price declines were in China, the United States and the European Union, with a drop of 8%-10%, and the price of LED indoor lighting products sold in Japan. More stable, the decline is between 5% and 8%.
At present, the ex-factory price of LED bulbs replacing 40-watt incandescent lamps is already around 35 yuan.
In the first half of the year, the market for LED indoor lighting in China grew rapidly, with a year-on-year increase of nearly 36%. Among them, the growth rate of LED tubes, LED bulbs, LED downlights and LED spotlights is obvious. It is estimated that in 2012, the scale of China's LED indoor lighting market will exceed 25 billion yuan, a year-on-year growth rate of more than 40%.
According to the survey, in the first half of this year, the growth rate of revenues of enterprises entering the LED indoor lighting industry slowed down year-on-year, with an average increase of about 15%. The manufacturers that started to enter the LED indoor lighting market in the second half of last year have become the main driving force for market growth. The income of new enterprises has increased by several times.
Since the first half of the year, the number of new LED indoor lighting companies has exceeded 1,800. Among them, more than 60% of new companies entering the LED indoor lighting industry, its main business is LED display and LED package.
Figure 1 2009 HI-2012H1 5W LED bulb average ex-factory price trend
Due to the slowdown in the growth of the LED display market, LED display companies are generally faced with the problem of how to achieve business breakthroughs, entering the explosive growth of LED lighting, becoming the first choice for many LED display companies.
In addition to the enterprises that entered the LED indoor lighting market in the early days, such as Zhouming Technology and Lianjian Optoelectronics, LED display companies such as Regent Optoelectronics and Sangao Branch also accelerated the development of LED lighting business. Shanghai Sansi also began to develop LED indoor lighting products. And plans to launch LED indoor lighting products next year. Ex-factory price dropped by 10% from the previous year. Since the first half of this year, the price of LED indoor lighting products in China has shown a slight downward trend, with a drop of less than 10%.
(unfinished)
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What is Car Ethernet
Car Ethernet is a new local area network technology that uses Ethernet to connect the electronic unit in the car. Unlike traditional Ethernet, which uses 4 unshielded twisted pair cables, car Ethernet can achieve a transmission rate of 100Mbit/s or even 1Gbit/s on a single pair of unshielded twisted pair cables. At the same time, it also meets the requirements of the automotive industry for high reliability, low electromagnetic radiation, low power consumption, bandwidth allocation, low latency and synchronous real-time. The physical layer of on-board Ethernet uses BroadRReach technology, and BroadR-Reach's physical layer (PHY) technology has been standardized by the One-pair Ethernet Alliance (OPEN). Therefore, it is sometimes called Broad RReach (BRR) or OABR (Open Alliance BroadR-Reach). The MAC layer of vehicle Ethernet adopts the IEEE 802.3 interface standard and seamlessly supports widely used high-level network protocols (such as TCP/IP) without any adaptation.
On-board Ethernet protocol architecture
Vehicle-borne Ethernet and its supported upper-layer protocol architecture are shown in Figure 1. Vehicle-borne Ethernet mainly involves OSI layer 1 and Layer 2 technologies, while vehicle-borne Ethernet also supports AVB, TCP/IP, DOIP, SOME/IP and other protocols or application forms.
On-board Ethernet framework
Among them, AVB is an extension of traditional Ethernet functions, which enhances the real-time performance of traditional Ethernet audio and video transmission by adding precise clock synchronization, bandwidth reservation and other protocols, and is a network audio and video real-time transmission technology with great development potential. SOME/IP (Scalable Service-Oriented MiddlewarE on IP) specifies the video communication interface requirements for vehicle camera applications, which can be applied to the field of vehicle cameras, and realizes the mode control of driver assistance cameras through apis.
As an extension of AVB protocol, Time-Sensitive Networking (TSN) introduces related technologies of time-triggered Ethernet, which can efficiently realize the transmission of automotive control information. In addition, the on-board Ethernet of the 1Gbit communication standard also supports Power Over Ethernet (POE) function and Energy-Efficient Ethernet (EEE) function. The POE function provides power for connected terminal devices while transmitting data through twisted pair cables, eliminating the need to connect external power cables to terminals and reducing the complexity of power supply.
On-board Ethernet standardization
In terms of in-vehicle Ethernet standardization, the IEEE802.3 and IEEE802.1 working groups, AUTOSAR, the OPEN Alliance and the AVnu Alliance have played a major role in promoting it.
The IEEE802.3 local area network standard represents the mainstream Ethernet standard in the industry, and the on-board Ethernet technology is developed on the basis of IEEE802.3, so the IEEE is currently the most important international standardization body for on-board Ethernet. In order to meet the requirements of the car, it involves the development of a number of new specifications and the revision of the original specifications within the two working groups of IEEE802 and 802.1, including PHY specifications, AVB specifications, and single-wire to data line power supply. In addition, AVB related to AV transmission, timing synchronization and other specifications also need to be standardized by other technical committees of IEEE, such as IEEE1722 and IEEE1588.
OPEN Alliance
The OPEN Industry Alliance was launched in November 2011 by Broadcom, NXP, and BMW to promote the application of Ethernet-based technology standards to in-car connectivity. The main standardization goal is to develop a 100Mbit/s BroadR-R physical layer standard and develop OPEN interoperability requirements.
AUTOSAR
AUTOSAR is a consortium of automotive manufacturers, suppliers, and tool developers that aims to develop an open, standardized automotive software architecture, and the AUTOSAR specification already includes the automotive TCP/UDP/IP protocol stack.
AVnu
The AVnu Alliance was formed by Broadcom in collaboration with Cisco, Harman and Intel to promote the IEEE 802.1 AVB standard and the Time Synchronization Network (TSN) standard, establish a certification system, and address important technical and performance issues such as precise timing, real-time synchronization, bandwidth reservation, and traffic shaping.
Vehicle Router,Vehicle 4G Router,Vehicle 4G Wireless Router,Vehicle Wifi Router
Shenzhen MovingComm Technology Co., Ltd. , https://www.movingcommiot.com