Shenzhen LED industry has a staggering momentum, and the market has expanded four times in four years.

In the first quarter of this year, most of the LED enterprises in Shenzhen expanded their production and expanded. According to this trend, the LED industry in the city will reach 40 billion yuan, and may exceed 150 billion in 2015. Recently, at the LED industry international procurement salon held in Shenzhen, the executive vice president of Shenzhen LED Industry Association, Shi Shirong, optimistically predicted that Shenzhen will become the regional leader of the domestic LED industry.

Yu Shirong said that the LED market will have a huge breakthrough in the future, with broad application prospects and potential market demand of 20 trillion yuan. “South Korea’s Samsung has taken the lead in launching LED TV sets, and 200 TV chips are used in one TV set. At the end of last year, Konka entered Shenzhen Ruifeng and entered the LED industry. All the phenomena of such industrial capital investment have shown that the prospect of LED is gratifying. of."

Most of the participants agreed with Shi Shirong's point of view. Some experts said that the three most widely used LED applications are LED display, backlight application and lighting. According to Moore's Law, with the application of the scale market, the cost of lighting market has dropped sharply, and 56% of the existing lighting market opportunities have been replaced by energy-saving lamps and LED lights. In 2009, the global mobile phone sales exceeded 1 billion units, and the demand for LEDs is also extremely large. The scale growth rate of the domestic LED industry over the years shows a strong expansion: in 2007, the industrial scale was 15 billion, and the industrial scale in 2008 was 20 billion. In 2009, the preliminary statistics were 24.5 billion yuan.

At the international procurement salon hosted by the global market, representatives of manufacturing companies have said that LED products are mainly dependent on exports due to higher production costs and higher prices. How to reduce costs has become the most concerned topic for manufacturers. A representative from a Guangzhou factory revealed that they used the new materials to save 40% of the existing LED lighting and reduce the cost by 40%. This statement has attracted the attention of many manufacturers.

According to Qi Shirong, Shenzhen is the main LED production gathering place in the country, and the municipal government will provide a series of policy support. At present, relevant departments have begun to build eight major platforms, including Huaqiang North LED Purchasing Center, LED Technology R&D Institute, and Observation Research Center. Among them, LED technology research and development institute settled in Nanshan District, will apply for the construction of national-level LED R & D center, strengthen the exchange of enterprise R & D department; strengthen the view design and application design, build Shenzhen International [0.59 -1.67%] LED viewing center, view Jing Industrial Design Park; set up LED standard alliance, patent alliance; build LED industrial zone in Guangming New District; build unique service platform in financial service field.


A hard disk drive (HDD), hard disk, hard drive or fixed disk[b] is a data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material. The platters are paired with magnetic heads, usually arranged on a moving actuator arm, which read and write data to the platter surfaces.[2] Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. HDDs are a type of non-volatile storage, retaining stored data even when powered off.[3][4][5]

Introduced by IBM in 1956,[6] HDDs became the dominant secondary storage device for general-purpose computers by the early 1960s. Continuously improved, HDDs have maintained this position into the modern era of servers and personal computers. More than 200 companies have produced HDDs historically, though after extensive industry consolidation most current units are manufactured by Seagate, Toshiba, and Western Digital. As of 2016, HDD production (in bytes per year) is growing, although unit shipments and sales revenues are declining. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), which have higher data-transfer rates, higher areal storage density, better reliability,[7] and much lower latency and access times.[8][9][10][11] While SSDs have higher cost per bit, SSDs are replacing HDDs where speed, power consumption, small size, and durability are important.[10][11]

The primary characteristics of an HDD are its capacity and performance. Capacity is specified in unit prefixes corresponding to powers of 1000: a 1-terabyte (TB) drive has a capacity of 1,000 gigabytes (GB; where 1 gigabyte = 1 billion bytes). Typically, some of an HDD's capacity is unavailable to the user because it is used by the file system and the computer operating system, and possibly inbuilt redundancy for error correction and recovery. Performance is specified by the time required to move the heads to a track or cylinder (average access time) plus the time it takes for the desired sector to move under the head (average latency, which is a function of the physical rotational speed in revolutions per minute), and finally the speed at which the data is transmitted (data rate).

The two most common form factors for modern HDDs are 3.5-inch, for desktop computers, and 2.5-inch, primarily for laptops. HDDs are connected to systems by standard interface cables such as PATA (Parallel ATA), SATA (Serial ATA), USB or SAS (Serial attached SCSI) cables.


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