LED light source is a new generation of lighting source attracting attention, currently used in indirect lighting applications such as information display. These low-power LEDs have been quietly used in various products. Traffic signal lights, guide lights, etc. have been replaced by LED light sources because of the high cost of replacement. Other underground lights, underwater lights, etc. have also slowly replaced LED light sources. The automotive industry, which emphasizes high reliability, has also adopted various LED light sources from the rear lights, interior lights, instrument panels, etc. The backlight of mobile phones and displays is another application that helps the growth of the LED industry. The new LED backlight module replaces the traditional non-environmental cold cathode tube, and reduces the power consumption of the display. In addition to achieving the goal of energy saving and emission reduction Some portable electronic products (such as notebook computers, etc.) have increased their working hours and truly meet the demands that electronic products can be carried around. The light source of LED can provide colorful light output by means of program control, and quickly change the color to provide unprecedented visual effects. New applications have led to the vigorous development of the entire LED industry, and of course also led to the growth momentum of LED technology. The new generation of high-power LEDs are produced under such growth momentum.
The research and development achievements of high-power LED chips have pushed LED lighting applications from a small area of lighting (such as miner's lamps, flashlights, table lamps, mobile phones and backlight modules, etc.) to a large area of lighting. The so-called large-area lighting applications including headlights, street lights, tunnel lights, square lighting, factory lighting, park lights, etc. are all the next applications that drive LED and another wave of growth. Of course, these applications need to consider more restrictions than previous products, such as lighting regulations, light source mechanism and optical design, new requirements for power saving, expensive prices, heat dissipation problems caused by high power, and light decay. The problems and so on are the current bottlenecks. This article will explain the current status of these issues, in addition to its shortcomings and make suggestions.
Street lights (street lights) not only play an important role in maintaining smooth traffic, but also one of the important indicators for a city. At present, a simple colloquial word "Look at the car during the day and look at the lights at night" is popular in major cities with high growth. This shows how important street lights and street lights are! The use of LED street lights compared to traditional light sources used on street lights such as mercury lamps , High-pressure sodium lamps or halogenated metal lamps, etc., LED light source has the advantages of long life and maintenance-free. With the rising awareness of environmental protection, the new environmental protection regulations of the European Union RoHS (Restriction of Hazardous Substances for Electronic and Electrical Equipment) have been stipulated since July 1, 2006. All those containing lead, mercury, cadmium, hexavalent chromium and other heavy metals and polybromine Electronic and electrical equipment with flame retardants such as diphenyl ether and polybrominated biphenyls will be banned from entering the EU consumer market. This move will also affect other advanced countries and regions to follow up in the near future to protect the environment in which they live. This makes traditional light sources face the fate of being eliminated because they contain regulated substances, but they have the advantages of long life and energy saving. The new light source has naturally received extensive attention and discussion. In addition to the above description of the demand for LED street lights brought by green energy, the recent price of crude oil has risen steadily due to the turmoil in the international situation, and the price of each barrel of crude oil has exceeded 100 US dollars. The level continues to advance to 150 US dollars per barrel. Experts estimate If the situation in the Middle East deteriorates further, the price of oil per barrel will reach the sky-high price of $200 per barrel. China's domestic electricity shortage and the soaring crude oil prices have led the central government to put forward macro-control policies to curb excessive economic development and propose energy-saving and emission-reduction targets. Local governments around the world have put forward corresponding measures in response to the central government's call, and the energy-saving and emission-reduction effect of using LED street lamps can indeed effectively improve the current waste of road lighting.