Compared with high-pressure sodium lamps, LED lamps have the advantages of low energy consumption, high brightness, fast response, long life, arbitrary dimming, wide color temperature range, high color rendering index and flexible intelligent control, making them the most ideal light source for road lighting. Widely concerned by the Chinese government. From "Ten Cities and Ten Thousand Cities" to "Fifty Cities and Two Millions", and then to the "Semiconductor Lighting Demonstration Project", it can be seen that LED street lighting has always been the focus of national policy support.
However, even if many advantages are in the body, there are policies that favor the promotion of LED street lighting. According to Changcheng Liangshun of Yanyaguang Power Plant, “At present, there are more than 14 million street lamps installed in the country, of which only 530,000 LED street lamps account for 4% of the total installation of street lamps.†In addition to the lack of industry standards, high prices, and difficult maintenance, the biggest problem is that the LED street lamp cooling technology and the short board that really adapts to the harsh environment of roads in various regions are still not resolved, resulting in LED road lighting failure. Frequent power failures and dead lights are serious, which is not conducive to the scale of LED street lights. Therefore, solving the heat dissipation problem has become the premise of the promotion of LED street lamps.
Recently, Yanya Optoelectronics announced the launch of the first street lamp based on thermal magnetic radiator, which can effectively solve the heat dissipation problem of LED street lamps. Cheng Liangshun told Gaogong LED reporter, "Thermal radiator is a new type of radiator based on the new heat dissipation concept. It uses the characteristics that the polarity of the thermomagnetic material can be sequentially arranged in the thermal field environment, and forms a laterally moving thermal field on the surface of the radiator. Airflow to achieve the purpose of active heat dissipation."
The problem of heat dissipation is a disease in the street lamp industry
Simple processing technology with cost down
Patent application, preemptive
Modular design, optimistic about the future market
For more information, please refer to the "High-tech LED - Lighting Market" magazine June issue
brightness
LCD is a substance between solid and liquid. It can't emit light by itself, so it needs additional light source. Therefore, the number of lamps is related to the brightness of the Liquid Crystal Display. The earliest liquid crystal displays had only two upper and lower tubes, the lowest of the popular type was four lamps, and the high-end one was six lamps. The four-lamp design is divided into three types of placement: one is that there is a lamp on each of the four sides, but the disadvantage is that there will be dark shadows in the middle. The solution is to arrange the four lamps from top to bottom. The last one is the "U"-shaped placement form, which is actually two lamp tubes produced by two lamps in disguise. The six-lamp design actually uses three lamps. The manufacturer bends all three lamps into a "U" shape, and then places them in parallel to achieve the effect of six lamps.
Tip: Brightness is also a more important indicator. The brighter the LCD, the brighter the LCD, it will stand out from a row of LCD walls. The highlight technology we often see in CRT (ViewSonic is called highlight, Philips is called display Bright, BenQ is called Rui Cai) is to increase the current of the shadow mask tube to bombard the phosphor to produce a brighter effect. Such a technology is generally traded at the expense of image quality and the life of the display. All use this The products of this kind of technology are all bright in the default state, you always have to press a button to implement, press 3X bright to play the game; press again to turn to 5X bright to watch the video disc, a closer look is blurred, you need to watch The text has to be honestly returned to the normal text mode. This design actually prevents you from frequently highlighting. The principle of LCD display brightness is different from that of CRT. They are realized by the brightness of the backlight tube behind the panel. Therefore, the lamp has to be designed more so that the light will be uniform. In the early days when selling LCDs, it was a great thing to tell others that there were three LCDs. But at that time, Chi Mei CRV came up with a six-lamp technology. In fact, the three tubes were bent into a "U" shape. The so-called six; such a six-lamp design, plus the strong luminescence of the lamp itself, the panel is very bright, such a representative work is represented by VA712 in ViewSonic; but all bright panels will have a fatal injury , The screen will leak light, this term is rarely mentioned by ordinary people, the editor personally thinks it is very important, light leakage means that under a completely black screen, the liquid crystal is not black, but whitish and gray. Therefore, a good LCD should not emphasize brightness blindly, but more emphasis on contrast. ViewSonic's VP and VG series are products that do not emphasize brightness but contrast!
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ESEN Optoelectronics Technology Co., Ltd, , https://www.esenlcd.com