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Compared with incandescent lamps and fluorescent lamps, white LED lamps have the advantages of small size, long life, fast response, low power consumption, environmental protection, and high luminous efficiency. However, the white LED lamp has a long life and is prone to deterioration, the lamp is aging, resulting in light color deviation, color deterioration, and affecting the quality of the lighting. The general life span is 2 to 3 years. In order to solve these problems, Wenzhou University's College of Chemistry and Materials Engineering, a special professor of Qijiang, has invented new materials to Weidong, which can extend the life of LED lamps by about 10 years, and can be used for a long time to make LED lamps more widely used in high-end. Lighting on cars, high-speed rail, airplanes, submarines, etc. A few days ago, the author walked into the laboratory of Professor Wei Dong to explore the magic of this new material. The refining of yellow light single crystal at 2000 °C allows white LED lamps to last longer. Professor Weidong is introduced. Now the main process of white LED lamps on the market is to use blue light emitting chips and yellow light emitting phosphors. The combination of white light. However, the main problem of this process is that the AB glue that binds the phosphor is easy to age, especially when the lamp is illuminated for a long time, the phosphor of the AB glue can lose the original effect, thereby affecting the illumination of the white LED lamp. The effect, such as the light is not bright enough, the light is blue and so on. To break through this problem, we must start with a yellow phosphor. In this regard, Professor Wei Dong spent many years working on the yellow light single crystal material, which is produced in a high temperature environment of 2000 ° C, as long as a piece of each LED blue chip is matched (for example, 24 A single light source with a single crystal light source of 5.5mm5.5mm can be used to emit stable white light. Due to the high temperature resistance and good thermal conductivity of the crystal, the LED lamp can be made more durable and has a longer service life, especially for the bulb not being damaged by the high temperature caused by long-time illumination, so it is very suitable for the lamp used in high-end cars. , high-speed rail, aircraft or submarine lighting. A few days ago, the reporter saw the high-temperature furnace and the yellow crystal production of yellow crystals in Weidong's laboratory. The research has been successful for four or five years, and Weidong is currently negotiating cooperation with related companies. He said that in the production of yellow crystals, by controlling the composition, concentration, thickness, etc. of the crystal, different levels of light and color temperature can be adjusted to meet various needs, and white LED lamps of various lengths and shapes can also be produced. In addition, Weidong has also developed another yellow fluorescent material, which is an alternative material for yellow powder. Compared with yellow crystal, yellow glass is not as durable, but the cost is lower and the production cycle is shorter. Alternative materials have reached the market's technical indicators. Scientific research cooperation breaks through traditional craftsmanship and makes LED light production more convenient. Professor Weidong not only invented alternative materials, but also made white light LED lamps more durable. He also cooperated with foreign schools to break through traditional craftsmanship and make LED lamp manufacturing easier and more efficient. He said that the current process of white LED lamps requires a combination of chips and yellow powder or yellow crystals, so that the bonding of the two requires the use of AB glue, which is not so durable. So how to use glue instead of making the production process simpler, he came up with a new way to produce a blue chip on the yellow crystal, which is to make the two merge into one, no longer need glue bonding. Currently, the process is still under further development. In addition to trying to break through the traditional process, in order to make the white LED light more soft, he also developed a red crystal to emit red light. He said that only the white light emitted by the combination of yellow light and blue light is mostly glaring. If you add red light, it will make white light softer and more comfortable. At present, he is developing how to fuse yellow crystals and red crystals, and only one crystal can realize the effect of two crystals. The process needs further improvement.
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