In order to promote the reduction of greenhouse gases and alleviate the global warming process, countries have banned the production and use of incandescent lamps. China also plans to ban the import and sale of ordinary lighting incandescent lamps of 15 watts and above by October 1, 2016, and replace incandescent lamps with high-efficiency lighting products. In order to promote the reduction of greenhouse gases and alleviate the global warming process, countries have banned the production and use of incandescent lamps. China also plans to ban the import and sale of ordinary lighting incandescent lamps of 15 watts and above by October 1, 2016, and replace incandescent lamps with high-efficiency lighting products. Energy conservation is one of the most prominent advantages of LED, and it is also an important basis for the government to issue policies to promote the application of this technology. In general lighting, if dimming technology is introduced, the energy saving advantage of LED lighting can be exerted more. Main dimming methods and their advantages and disadvantages There are currently three most common dimming methods on the market: PWM dimming, thyristor dimming, and linear dimming. SCR dimming has been used for dimming and energy-saving lamp dimming methods earlier, and it is also the most widely used dimming method for LED dimming. The advantages of thyristor dimming are high working efficiency and stable performance. However, based on its working principle, there are some design defects in the application. The root of the defect is that the thyristor needs to maintain a current to maintain conduction after being turned on, otherwise it will return to the off state. PWM dimming technology is currently considered to be the most promising LED dimming technology. The advantages are simple application, high efficiency, high precision, and high dimming effect; the disadvantage is that since the general LED driver is based on the principle of switching power supply, if the PWM dimming frequency is between 200 and 20 kHz, the inductance around the LED driver and The output capacitor is prone to noise that is audible to the human ear. Linear dimming is mainly based on the simple voltage division principle. Its advantages are simple application and no interference. The disadvantages are inflexibility and low efficiency. When the LED current is reduced, the white LED will shift to the yellow spectrum. Because the partial pressure produces too much heat. Dimming driver IC price is too high According to industry sources, the current price of domestic LED lighting driver IC per chip is down to more than two hairs, the quality is not much different, and the same IC foreign manufacturers are also quoted in more than two, domestic enterprises Almost monopolized the LED lighting driver market, but the general driver IC market price is too low, almost unprofitable. As a result, semiconductor manufacturers have turned their attention to the more valuable LED dimming driver IC. Wang Yongbin, director of lighting products marketing for NXP Semiconductors in Greater China, said that the price of LED dimming driver ICs has now dropped to 0.45-0.6 dollars, while non-dimming driver ICs are about 0.3-0.4 dollars. At present, the price of LED dimming driver is still too high, which is mainly related to the lack of maturity of LED dimming lighting market: domestic LED lamps have almost no dimming demand, and foreign markets in North America and Australia also have little room for growth. International chip makers have been diversified by several chip makers, and the pace and intensity of pushing new products are not as good as before, and the prices are also high. Dimming compatibility is still a major obstacle to the large-scale adoption of dimming LED luminaires. In addition to the relatively expensive procurement costs, there are dimming compatibility issues similar to compact fluorescent lamps. For most consumers, buying LED bulbs today is a frustrating experience. Because you buy it home, you will find that most LED bulbs can't be used, so many fixtures can't solve the dimming compatibility problem. It is a very complicated project to solve the dimming compatibility performance 100% because it mainly involves 4 key parameters: function; flicker-free stable state; smooth dimming and dimming range (maximum-minimum). We know that whether it is from the perspective of energy conservation and environmental protection, or user experience, it is very necessary to develop dimming LED lighting, and it has very market prospects. The requirements for dimming are divided into three categories: one is the need to adjust the light for function, such as the entrance to the door, the conference room, etc.; the second is the embodiment of the comfort and lifestyle of the home life, the light and dark combination of the light can be based on the needs of the environment. Adjustments can also play a role in setting off the atmosphere; the third is the need for environmental protection and energy conservation, and the main reason for driving dimming technology into the future development direction of LED drive technology is energy conservation.
Shine Veneer Stacker Machine mainly include 4feet and 8feet automatic Veneer Stacker, mechanical veneer stacking Machine , vacuum veneer connecting machine and veneer stacking line with veneer grading system. A/B/C grade veneer can be stacked separately.Users can choose one of the stacking machine according to actual requirements.
Veneer Stacker Machine
Automatic Stacking Machine,Veneer Stacker Machine,Veneer Stacker,Plywood Veneer Stacker
Shandong Shine Machinery Co.,Ltd , https://www.shinewoodmachine.com