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The factors influencing the LED light failure description - (AddTime :2013-01-08)

200W led Flood light lamps and lanterns as a new type of green lighting, energy saving, environmental protection, long life, pursue honors by the customers. But the 200W led Flood light light failure problem, it is a 200W led Flood light lamps and lanterns have to face the problem. The light of the continuous decline, the serious influence the use of 200W led Flood light lamps and lanterns.

So far, the white 200W led Flood light light on the market decline may be to civil lighting into one of the primary problem. What causes the 200W led Flood light 's light failure? Generally speaking, in view of the 200W led Flood light light failure has two main factors:

A, 200W led Flood light product quality problem:

1, the 200W led Flood light chip constitution is bad, brightness decay rapidly. 2, production process defect, 200W led Flood light chip cooling can not good from the foot of the PIN is derived, exacerbate the 200W led Flood light chips temperature is too high to attenuation.

Second, the conditions of use:

1, 200W led Flood light constant current drive, some 200W led Flood light by voltage driver makes 200W led Flood light attenuation.
2, the drive current is greater than the rated driving conditions. Actually lead to 200W led Flood light products light some of the reasons for failure, the key is still hot problem, although a lot of manufacturers in the secondary products not particularly pay attention to the problem of heat dissipation, but these subprime 200W led Flood light products use for a long time, the light failure degree than there are pay attention to the heat dissipation of 200W led Flood light products. 200W led Flood light chip itself the thermal resistance, the influence of silver, the cooling effect of the substrate, and colloid and gold are also have relationship with light failure. Three factors influencing the quality of 200W led Flood light lamps and light failure First of all, choose what kind of white 200W led Flood light lights. It is important, the quality of white 200W led Flood light can be said to be the very important factor. Give some examples, the same represented by 14 mil for white light chip wafer, made of common epoxy resin adhesive with BaiGuangJiao and packing glue out of white 200W led Flood light lamp, single light in 30 degrees, under the environment of, one thousand hours after the attenuation data for light decline 70%; If use D class low failure glue encapsulation, in the same aging environment, thousands of hours of light failure is 45%; If C glue sealing and low failure in the same aging environment, thousands of hours of light failure is 12%; If B type low failure glue sealing, in the same aging environment, thousands of hours of light failure for - 3%; If A kind of low failure glue, in the same aging environment, thousands of hours of light failure for - 6%. Secondly, 200W led Flood light lamp bead work environment temperature. According to single 200W led Flood light white light aging of the data, if only one white 200W led Flood light lamp light work, at the same time, it is the environment temperature is 30 degrees, so, single white 200W led Flood light lamp bracket temperature at work not more than 45 degrees. 200W led Flood light the life of this time, it would be ideal. If there are 100 white 200W led Flood light lamp light work at the same time, the interval between them is only 11.4 mm, so, the light of the surrounding white 200W led Flood light lamp bracket temperature may also can't more than 45 degrees, but the light of those in the middle of the white 200W led Flood light lamp is likely to achieve the high temperature of 65 degrees. This time, the 200W led Flood light lamp bead is a test. So, gathered in the middle of the white 200W led Flood light lamp, theory of glazing failure will be faster, and the lamp of the surrounding white 200W led Flood light lamp, the light failure will be a little more slowly. Anyway, everyone should know, 200W led Flood light is afraid of heat, the higher the temperature, the 200W led Flood light life is short, the temperature is lower, 200W led Flood light life is longer. 200W led Flood light the ideal working temperature between 5 to zero, of course, is in the negative. But it is basically impossible. So, we understand that there is a 200W led Flood light lamp bead the ideal working parameters, and as far as possible in the design of the lamps and lanterns, strengthen heat conduction, heat dissipation function. Anyway, the lower the temperature, the 200W led Flood light life is longer. Again, 200W led Flood light lamp bead work electrical parameters of the design. According to the experimental results, the white 200W led Flood light lights under the condition of the drive current is lower, the smaller the quantity of heat of emission, of course, brightness is smaller. According to the survey, 200W led Flood light solar lamp circuit design, 200W led Flood light the drive current general just 5-10 ma; Lamps and lanterns of the lamp bead with large number of products, such as more than 500, or more, the drive current is normally 10 to 15 ma, and the popular application of 200W led Flood light lamp drive current, just 15-18 ma, rarely more than the current design to 20 ma. 14 ma and the experimental results also show that the flow driven by electricity, and, with the lid does not leak, the air inside the temperature reached 71 degrees, under the environment of low failure products, thousands of hours of light failure to zero, 2000 hours of light failure is 3%, this means that the white low failure 200W led Flood light lights used in such an environment has reached its maximum, again big is a kind of hurt for it. Because there is no heat aging in the aging board function, so the 200W led Flood light work the heat transmission is basically can't go outside. The experiment proved this point. Aging board inside the air temperature has reached 101 degrees of high temperature, aging board the lid of the surface temperature is only 53 degrees, is a few degrees. It shows that the design of the plastic lid basically do not have heat conduction heat dissipation function. But the lamps and lanterns of general design, considering the heat conduction of heat dissipation function. So, in summary, the 200W led Flood light lamp bead work electrical parameters of the design according to the actual situation, if the thermal conductivity of lamps heat dissipation function is very good, white 200W led Flood light lamp is the drive current increase a little of it doesn't matter, because the 200W led Flood light lamp bead work heat moments can be derived to outside, no damage to the 200W led Flood light , is the best care for the 200W led Flood light . On the contrary, if the thermal conductivity of lamps heat dissipation function so-so, best circuit design to be a little bit small. Let it put less heat.