Electronic enthusiasts eight o'clock: Huawei announced the launch of the industry's first high-temperature long-life graphene lithium-ion battery, which suddenly caused widespread concern about graphene. Ren Zhengfei, president of Huawei, said that in the next 10-20 years, graphene will trigger a technological revolution and become a black technology that completely changes the 21st century. Is this going to change for the LED industry?
Graphene is known as the "king of materials" in the new century. Its advent has brought great shock and impact to the industry. As a new type of nanomaterial that is currently found to be the thinnest, strongest, and most conductive and thermally conductive, graphene is predicted by scientists to "completely change the 21st century." Its application is very likely to set off a subversive revolution sweeping the globe.
Thanks to its superior electrical and thermal conductivity, the emergence of graphene has brought new life to the LED industry. The magical graphene molecule not only greatly enhances the performance and service life of LED luminaires, but also has a price advantage that is cheaper than conventional LEDs. Industry insiders predict that LED products using graphene technology will bring another innovation to lighting technology.
However, many researchers have pointed out that graphene, as a new material, has to be widely used in the LED field, and it can be described as "a bright future and a tortuous road." Due to the technology and high cost of graphene production, the road of graphene + LED in the future can be described as long and long.
One of the discoverers of graphene, Andrei Heim, winner of the 2010 Nobel Prize in Physics, described: "Graphene is as amazing to many people as Alice in Wonderland."
Graphene is actually a two-dimensional crystal with a thickness of one atom, which is separated from the graphite material and composed of carbon atoms. The graphite used in the pencil lead is equivalent to a myriad of layers of graphene stacked together.
“It is by far the thinnest and strongest material in nature, can be stretched infinitely, bent to a large extent without breaking, and can withstand a lot of pressure,†said Andre Heim.
In addition, it has extraordinary thermal conductivity and electrical conductivity. It is reported that graphene is one of the most conductive materials in the world, and about one percent of graphene is added to plastic to turn them into conductors. The weight is also extremely light, the same thickness is 200 times the strength of the steel, but can transmit electrons at a speed of 1 million meters / sec. Graphene can be used both as a conductor material and as a semiconductor material. It is the material with the highest room temperature conductivity in known objects and is orders of magnitude higher than the best conductor metals such as gold or copper.
“Graphene has high conductivity and stable chemical structure. It is an ideal electrode material for mobile batteries and power supplies.†Cheng Huiming, a member of the Chinese Academy of Sciences and a researcher at the Institute of Metal Research, Chinese Academy of Sciences, said graphene and electronic components. The electronic devices are further combined to increase the storage rate of other electrical storage devices.
It is reported that the most potential application of graphene is to become a substitute for silicon, manufacturing ultra-micro transistors for the production of future supercomputers. By replacing silicon with graphene, computer processors can run hundreds of times faster.
In addition, graphene is almost completely transparent, absorbing only 2.3% of light. On the other hand, it is very dense, and even the smallest gas molecules (helium) cannot penetrate. These features make it ideal for use as a raw material for transparent electronic products such as transparent touch displays, luminescent panels and solar panels.
In view of the excellent thermal conductivity and electrical conductivity and high transparency of graphene materials, the LED industry has begun to try to use graphene in the field of LED chips and heat dissipation.
In 2015, the National Graphene Institute of the University of Manchester in the UK developed a new graphene bulb with a stronger structure and lower cost than LED bulbs. According to researchers, the new graphene bulbs are still based on LED technology development, greatly enhance their performance and service life through magical graphene molecules, and hopefully cheaper than traditional LED bulbs. The innovative technology of the graphene bulb is a dimmable bulb, the bulb has a filament-shaped LED lamp, and the outer layer of the LED lamp is coated with graphene, and the graphene has strong conductivity, which can make the bulb use time is extended, and Reduce energy consumption by 10%.
Professionals also believe that the replacement of "silicon" will bring a subversive change to the LED chip industry. According to the Massachusetts Institute of Technology, graphene technology can increase the speed of chips by a million times. If it can be successfully commercialized, this is undoubtedly a new revolution for the chip industry. In the past few decades, silicon has been the first choice for the manufacture of chips, and the emergence of graphene, in the future, will replace silicon as the main material of the chip.
On the other hand, in addition to excellent thermal conductivity, graphene is also expected to replace existing rare earth elements to make white LEDs. Researchers from Tsinghua University in Taiwan, in a published article, claimed that materials other than rare earth elements were used to make LED products that could emit white light. According to reports, this LED is based on alkali metal ruthenium, built a metal organic framework (MOF), combined with graphene and other materials on the top and bottom of the MOF, constitutes an LED that can directly emit white light.
At present, with the gradual maturity of the LED market and the increasingly fierce competition, how to reduce costs and manufacture higher performance products has become the goal pursued by LED companies. The combination of graphene and LED lighting will undoubtedly bring a new breakthrough for the sustainable development of the LED industry.
On August 4, 2016, the signing ceremony of the merger of Shandong Jingtaixing Optoelectronics Technology Co., Ltd. and British Graphene Lighting Company was held in Shandong Building. The merged new company will be the first company in the world to apply graphene technology to LED lighting in a large scale, and will actively promote the development of LED lighting industry.
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The dog trainer is an electronic collar that assists the owner in correcting the behavior of the pet dog. This electronic collar can help the owner to train the pet dog within a certain range. Send a signal driving command through the remote control transmitter, such as sound signal, vibration signal, electric shock signal. After the receiver receives the signal instruction, it will make corresponding mechanical activities to remind the pet dog's behavior. Get rid of the bad habits of your pet dog.
The dog training device is a product developed based on the principle of wireless remote control. It consists of two parts: the remote control (the owner's end) and the receiver (the dog wearing end). The owner receives the dog's neck through the remote control in his hand. The device emits work instructions, so as to achieve the purpose of training pet dogs.
The remote control of the dog trainer has three modes, usually three functional modes: sound, vibration, and static pulse. For the use of the three modes, when the pet dog's bad behavior occurs, it will give a sound reminder, or a vibration reminder, or an electric shock pulse reminder. . If things go on like this, the dog will form a conditioned reflex, knowing which behaviors should be stopped immediately.
The receiver does not need to be worn for a long time. After the owner uses the remote dog training device, he needs to check the health of the pet dog`s neck and skin regularly.
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