Led Tube lighting technology with the rapid development of many cities in the country, road lighting has been no lack of Led Tube lights the scene. Especially in high-power Led Tube light effect devices over 100lm / W After, Led Tube street lighting as the development trend of the road has been generally recognized. In 2009, several cities in China were organized Led Tube evaluation of road test lighting products, most of Led Tube lamp products in the distribution curve, the system optical efficiency indicators and other key technologies made significant progress in road lighting standards compliance energy-saving effects, has reached the relevant standards and specifications.
Although Led Tube lamp rapid development of technology, but most of Led Tube lamp manufacturers in the product development process neglected in the cold environment of the particular application of technical requirements. A common myth is that, Led Tube in the cold regions are conducive to heat, not prone to failure. As everyone knows, the cold application environment, on the Led Tube lamp has a more stringent technical requirements, mainly in the following two aspects:
(1) lower the temperature in the cold, and the temperature, and sudden changes in hot and cold temperature impact and long-term work for the device has a more stringent quality requirements Fiber Optic Terminal Box.
(2) in the cold regions of the Led Tube lights have to consider precautionary measures to prevent ice condensation.
For these reasons, Led Tube lights in the cold regions of the application, the following aspects need to address the key technical problems.
Hot and cold temperature shock may cause the failure of the device Led Tube
As Led Tube chip package, the devices are solid-solid, there are chips, silicone (or resin), metal support and lead expansion coefficient mismatch between the phenomenon of cold regions with large temperature difference between hot and cold shocks, silica in the temperature change will make the process of expansion and contraction increased, the device internal stress is too large, which will lead to Led Tube wire bonding the displacement increases, the lead early fatigue and damage. Bonding also makes the state less the original spot appears sealing off the possibility of the electrode caused by ball and chip Sealing-off phenomenon, and even appeared to make tiered Led Tube chip off the failure phenomenon.
A Led Tube Led Tube device lights up to the application of hundreds of stars, usually in series hybrid-based configuration Centrifugal Fan mode, if a failure Led Tube, Led Tube will lead to joint failure of multiple satellites, the application in cold regions Led Tube lights first use of the environment under specific temperature changes under the lights, set reasonable ultrasonic power, bonding pressure, bonding time and bonding temperature packaging process parameters, to ensure that every device in a low-temperature Led Tube the reliability of operating environments.
