The PN junction inside the LED is applied to the manufacturing, assembly screening, testing, packaging, storage and transportation of the electronic product, and installation and use. It is inevitable that the induced charge will not be affected by the electrostatic induction.
If the charge is not released in time, a higher potential difference will be formed on the two electrodes. When the charge energy reaches the LED's tolerance limit (this is the LED antistatic index value), the charge will be released instantaneously.
Discharges between the two electrodes of the LED chip in a very short time (nanosecond level), and instantaneously will be between the two electrodes (where the resistance is the smallest, often around the electrode), the conductive layer, the luminescent layer, etc. The internal material produces a local high temperature, and the temperature is as high as 1400 ° C. At this extreme high temperature, the material layer between the two electrodes is melted and melted into a small hole, thereby causing various abnormalities such as leakage, dead light and darkening.
The anti-static of LED chips of different enterprises, different processes, different substrate materials and different designs is also very different. The current anti-static height of the market is very different and the fish are mixed.
The antistatic level of the LED is independent of the package of the LED, depending on the chip itself. Some companies have adopted Zener diodes to protect them. This is a remedy adopted in the early days. Now, LED chip technology continues to advance, and this method is gradually becoming costly and operability is weak.
Once the enterprise encounters an LED LED light leakage and other accidents, the idea is often to strengthen the static management of its production workshop, such as grounding, laying static table mats, ion fans, etc., but this is not a cure, static is nowhere No, it can be said that 'hidden the first day can not hide fifteen'. Because the LED antistatic index used is low, it is difficult to cure a newborn with a health defect.
The company chooses LEDs (chips) with high anti-static index, which will completely solve the leakage accidents such as leakage and dead lights of LED caused by static electricity. Because of the high anti-static LED, it can adapt to various environments, such as LED anti-static. Above 2000V, it can generally withstand the static electricity in our normal environment. LEDs above 3000V can shine in the environment without deliberately strengthening the static control.
The so-called mini projector is also called pico projector, TRT-Lcos Portable Projector. Mainly through the 3M LCOS RGB three-color projector and 720P film decoding technology, the traditional huge projector is refined, portable, miniaturized, entertaining and practical, making the projection technology closer to life and entertainment.
Usually the projector has certain regulations on 2 aspects:
a). Size: Usually the size is the size of a mobile phone.
b). Battery life: It is required to have at least 1-2 hours or more of battery life when it is not connected to power.
In addition, its general weight will not exceed 0.2Kg, and some do not even need fan cooling or ultra-small silent fan cooling. It can be carried with you (it can be put into your pocket), and the screen can be projected to 40-50 inches or more.
Advantage:
1. Completely replace the MP5 player, video, listening to songs, playing games, e-books, picture browsing, etc. MP5 video is affected by physical performance, the screen can not be bigger, and the screen of this thing is at least 20 inches.
2. Instead of the TV function, the machine can have a built-in CMMB function, or it can be directly connected to the set-top box to play the TV, and it can be used as a 21-inch TV during the day.
Look, it can be used as a 60-100-inch TV at night to achieve the effect of home theater; it is convenient to move and break through the traditional film and television space. Even if you are on the mountain, you can also share today's TV series, movies, and MTV with your lover.
3. Business office: instead of large projectors, it is used for company meetings; the price of large projectors is 4,000 to 14,000, and the lamp life is more than 1,000 hours, which is not convenient to carry. 30,000 hours, no need to change the bulb for 3 years, easy to carry, the salesman only needs to bring a micro projector to demonstrate the new product, which can achieve the demonstration effect.
4. Teaching: training meetings, classroom teaching; traditional projectors are not easy to carry. In school classrooms, due to the naughty students, projectors are not safe to place in the classroom and are easily damaged by students. The portability of micro projectors makes up for the teaching vacancies. In the future, teachers only need to store the materials in the projector and show them to students for teaching, saving the trouble of textbooks and handwriting with pens and chalks.
In addition, the micro-projection has no radiation, which can fully protect pregnant women and people with myopia. Its low power consumption function is 1/1,000,000 of the power consumption of color TVs. One day of electricity has completely impacted the indicators of safety, environmental protection, health, etc., and has made amazing contributions to future social development, standing at the peak of the green world as a leader.
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