Pingjin is in a hurry! North China is in a hurry! The Chinese nation is in a hurry! More than 80 years ago, the Japanese aggression invaded the future of North China into a fog. The anti-Japanese national salvation movement of the whole nation was like a slap in the face, awakening the patriotism of the people and driving away the Japanese aggressors. Today, 80 years later, Pingjin North China has once again fallen into a heavy fog. This time it is the punishment of nature for our bad behavior. In the spring and autumn, the North China region is caught in a sandstorm of yellow sand, and the winter smog is coming again. . Beijing has used it for decades to finally win the title of the foggy capital of London. This time, the service for the people was also ridiculed by the netizens to feed the people. Recently, the Beijing Heavy Pollution Emergency Command issued a blue warning for heavy air pollution, which was the first heavy pollution warning in 2014. According to the Beijing Environmental Protection Monitoring Center, the real-time concentration of PM2.5 at the Wanshou Xigong monitoring site is 623 μg/m3, and the other sites are over 500 μg/m3. For the first time since this year, PM2.5 has exceeded 500 μg/m3. .
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In the smog weather in the fog, the Tiananmen Square in Beijing suffered from fog and smog in the city. The visibility of Tiananmen Square and the surrounding area was low, and the air quality was extremely poor. In the square, the LED large screen is always on. In the picture, we can observe that the visibility around is very low, but the led light in the smog is especially eye-catching. Why do you want to use red led in fog? Some surveys have shown that 60 traffic accidents occurred at night and in bad weather, mainly because of the poor line of sight when driving and the high speed of the car. Especially at night, when there is no road lamp and smog on the road, the distance from the headlights is limited, and there is a safety hazard. The use of LED large screens for visual assistance in traffic makes it very helpful for drivers to clearly and clearly observe the information in front of low visibility or darkness. Let the drivers remind each other of the avoidance of the vehicle and make the trip safer. The LED display under the smog adopts a red led large screen in foggy weather or at night. It is because the wavelength of the red LED has an emission center wavelength of about 620 to 630 nm. Mainly used for neon lights, indicators, car taillights and signal machines, red light sources for LED displays, and backlights for liquid crystal panels. Red LEDs have different drive voltage and temperature characteristics than blue and green LEDs. This is because the semiconductor materials are different, the red LEDs use AlInGaP, and the blue LEDs and green LEDs use GaN-based materials. In terms of driving voltage (forward voltage), the red LED is 2V or more, and the blue LED and the green LED are 3V or more. In terms of temperature characteristics, the output power of the red LED will change greatly due to the influence of temperature. The output power at high temperature is lower than that of the green LED and the blue LED. It has a wide range of applications and its wavelength is longer than other colors. Due to the difference in these characteristics, the penetration ability of the red LED is stronger than that of green and blue. Therefore, the red led in the haze weather is more conducive to attracting people's attention in places with poor visibility. LED market prospects in the field of public lighting and commercial lighting Currently, the market prospects in LED public lighting and commercial lighting are large. In 2013, the market penetration rate may be more than 10, and civil lighting may be relatively weak. However, this is enough to support the recovery of the entire market. Public lighting and commercial lighting account for about 70% of the total market. Relying on the inherent advantages of LED displays, LED advertising machines have many advantages in the field of public lighting and commercial lighting compared with traditional LCD advertising machines. For example, the screen brightness of the LED advertising machine can reach 5000 cd/m2, and in the outdoor environment, both the coverage and the display effect can exert greater effects. In the past year, although the share of LED display in the outdoor application market has shown a growth trend, the driving force for growth is not the increase in the number of screens, but the added value of the original screen. This means that with the increase in demand in the application market, the traditional extensive business model can no longer promote the development of the industry. If the LED display industry wants to maintain steady growth, it is necessary to take a refined route and refine the market application. The LED display manufacturers' development of the indoor application market and the investment in outdoor advertising machines are a new attempt for this change.
[img]/uploads/allimg/140121/1635021200-0.jpg[/img]
In the smog weather in the fog, the Tiananmen Square in Beijing suffered from fog and smog in the city. The visibility of Tiananmen Square and the surrounding area was low, and the air quality was extremely poor. In the square, the LED large screen is always on. In the picture, we can observe that the visibility around is very low, but the led light in the smog is especially eye-catching. Why do you want to use red led in fog? Some surveys have shown that 60 traffic accidents occurred at night and in bad weather, mainly because of the poor line of sight when driving and the high speed of the car. Especially at night, when there is no road lamp and smog on the road, the distance from the headlights is limited, and there is a safety hazard. The use of LED large screens for visual assistance in traffic makes it very helpful for drivers to clearly and clearly observe the information in front of low visibility or darkness. Let the drivers remind each other of the avoidance of the vehicle and make the trip safer. The LED display under the smog adopts a red led large screen in foggy weather or at night. It is because the wavelength of the red LED has an emission center wavelength of about 620 to 630 nm. Mainly used for neon lights, indicators, car taillights and signal machines, red light sources for LED displays, and backlights for liquid crystal panels. Red LEDs have different drive voltage and temperature characteristics than blue and green LEDs. This is because the semiconductor materials are different, the red LEDs use AlInGaP, and the blue LEDs and green LEDs use GaN-based materials. In terms of driving voltage (forward voltage), the red LED is 2V or more, and the blue LED and the green LED are 3V or more. In terms of temperature characteristics, the output power of the red LED will change greatly due to the influence of temperature. The output power at high temperature is lower than that of the green LED and the blue LED. It has a wide range of applications and its wavelength is longer than other colors. Due to the difference in these characteristics, the penetration ability of the red LED is stronger than that of green and blue. Therefore, the red led in the haze weather is more conducive to attracting people's attention in places with poor visibility. LED market prospects in the field of public lighting and commercial lighting Currently, the market prospects in LED public lighting and commercial lighting are large. In 2013, the market penetration rate may be more than 10, and civil lighting may be relatively weak. However, this is enough to support the recovery of the entire market. Public lighting and commercial lighting account for about 70% of the total market. Relying on the inherent advantages of LED displays, LED advertising machines have many advantages in the field of public lighting and commercial lighting compared with traditional LCD advertising machines. For example, the screen brightness of the LED advertising machine can reach 5000 cd/m2, and in the outdoor environment, both the coverage and the display effect can exert greater effects. In the past year, although the share of LED display in the outdoor application market has shown a growth trend, the driving force for growth is not the increase in the number of screens, but the added value of the original screen. This means that with the increase in demand in the application market, the traditional extensive business model can no longer promote the development of the industry. If the LED display industry wants to maintain steady growth, it is necessary to take a refined route and refine the market application. The LED display manufacturers' development of the indoor application market and the investment in outdoor advertising machines are a new attempt for this change.
All Metal Casting parts need to have wax molds to produce the product. Only a mold with high production precision and reasonable structure can ensure the production of qualified Investment Casting Parts. Therefore, the production of molds is very critical for investment casting. First of all, we must ensure the accuracy of the molds. Only high-precision molds can produce high-precision products. It is also necessary to consider the position of the gate to ensure the balance of the wax flow, the convenience of subsequent removal of the gate, and the importance of the size of the gate position; and the rationality of the mold structure, only the design is reasonable. The mold structure can ensure efficient production and long mold life.
SCZY has its own mold manufacturing workshop, and the overall accuracy of the mold can reach ±0.02mm. Before manufacturing the mold, we will systematically analyze the mold structure and gate position to ensure that the produced mold can produce products accurately and efficiently.
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