Known as the "third lighting revolution", the LED industry is highly valued by the government and sought after by the industry for its energy saving and environmental protection advantages. However, in a good voice, LED still faces various problems such as lack of core technology, lack of industry standards, high prices, and difficulty in large-scale promotion.
Technically still not perfect
“Not very mature yet.†Yesterday (June 9th), at the “2010 Energy Conservation Publicity Week and Guangdong LED Industry Summit Forum†held in Guangzhou, Shang Sheng, director of information display and optoelectronic technology of South China University of Technology, said. In his view, due to various aspects of technology and other aspects, the development of China's LED industry is not as good as imagined.
In recent years, China's LED industry has developed rapidly. The four major regions of the Pearl River Delta, the Yangtze River Delta, Jiangxi and Fujian, Beijing and Dalian have been formed. Some experts predict that in 2010 China's LED output value will reach 150 billion yuan, twice as much as in 2008. However, when the scale of the industry expanded rapidly, technology research and development was far behind.
In this regard, Xiang Xiaomei, director of the Institute of Industrial Economics of the Guangdong Academy of Social Sciences, said that the industry's slow technological progress, low product innovation, and insufficient technical content have led to a lack of core competitiveness in the LED industry.
LED industry chain includes extension, chip, packaging and application. Due to the lack of key technologies, most of China's enterprises are concentrated in downstream areas such as packaging and application. The high-end links of the industry chain are relatively weak, and the upstream technology is subject to people. Enterprises that have the heart to enter the upstream of the industrial chain, such as extension, are generally bleak, and there are also many companies that have been forced to withdraw.
The problem of light decay is also a tight spell on the head of LED lighting companies. LED light sources now have a common light fade problem. Some LED street lights installed in less than one year, the brightness is severely attenuated. According to Wen Shangsheng, LED lamps convert electrical energy into light energy and heat energy during operation. For every 2 °C rise in component temperature, the reliability of the lamp will drop by 10%. When the operating temperature rises from 63 °C to 74 °C, the LED average Life expectancy will be reduced by 3/4.
Products are difficult to widely use
The imperfections in LED technology have also hindered the widespread use of products in the market. Not only when LED products can enter the homes of ordinary people is an unknown number, but also the “Ten Cities and Ten Thousand Cities†project promoted by the state is also in the market. The large-scale promotion of LED products is difficult.
Hundreds of high prices have kept the needs of ordinary people out of the door, and large-scale commercial applications are still immature, so many people have to explore how to get rid of LED "energy saving and not saving money" curse .
The government's support in procurement and other aspects has promoted the marketization of LEDs to a certain extent. However, in the demand created by such government, some enterprises are often overly optimistic and flocking. Some products with poor quality have also flocked to the market, which has caused consumers' distrust of LED products objectively and the difficulty of promotion has further increased.
Contract energy management, which is regarded by the industry as an LED booster, has to push itself to the road. Since the introduction of China, the contract energy management model has been in a state of tepid. Contract energy service companies also have problems of small scale and high risks. Wen Kai, executive deputy director of the Guangdong Green Industry Investment Fund Operation Office, believes that contract energy management still faces three barriers of technology, credit and capital. The water test project is also only a demonstration role, and there is still room for improvement in terms of scale and marketization.
Application-Specific Integrated Circuit refers to an integrated circuit specifically designed to perform a specific computing task. It is very common to use ASIC for mining in the field of blockchain. This article will analyze the principle of ASIC mining and why it should be anti-ASIC.
For Bitcoin, mining has gone through four stages: CPU, GPU, FPGA and ASIC. GPU is naturally suitable for parallel simple operations, so the execution of SHA256 is much higher than the CPU. FPGA is a programmable hardware, because it has a certain degree of universality, so the unit price will be relatively expensive. ASIC has a large initial design investment, but the unit price will be cheaper after mass production. Therefore, if you can determine that the market size is relatively large, the use of ASIC technology will be the most cost-effective.
This is the basic principle of ASIC.
In a nutshell, mining is running complicated calculations in the search for a specific number. Whether it`s an ASIC miner or a GPU mining rig, mining hardware must run through many calculations before finding that number. In proof of work systems like Bitcoin, the first one to find that number gets a reward - at the time of writing, 12.5 Bitcoins worth around $96,850. That reward will fall to 6.25 Bitcoins in May 2020.
There are so many people and powerful computing systems trying to mine Bitcoin that miner groups form to find that number and share the profit. Even more, the faster your hardware, the more you earn. That`s why people who can afford it opt for ASIC miners because it gives them the greatest chance of earning cryptocurrency in exchange for their investment.
Each cryptocurrency has its own cryptographic hash algorithm, and ASIC miners are designed to mine using that specific algorithm. Bitcoin ASIC miners are actually designed to calculate the SHA-256 hash algorithm. In the case of Litecoin, it uses Scrypt. That means technically they could mine any other coin that`s based on the same algorithm, though typically, people who buy ASIC hardware designed for Bitcoin mine that specific digital currency.
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