Analysis of high power LED in lighting applications

At present, to solve the fundamental problem, only to take remedial measures, such as the use of aluminum substrate to deal with insulation (the original aluminum substrate has not been insulated, and now almost all done) may not be understood. Single LED insulation, little effect, there are many problems when the series. 3, the problem of LED pulse resistance and the manufacturers are still controversial, in my practical application does exist, the main reaction in the cold pulse, that is, the power of the moment, a few LED in the cold state of the electricity.

1, LED single color LED applications, there is no color problem, but if a lot of LED put into use or a lamp with multiple LED at the same time, the color problem will appear.

2, LED insulation problem (here refers to the heat insulation of the substrate on the LED positive and negative poles) do not dare to say that we are the first to find the insulation problem of LED, but at least the big name manufacturers are surprised to our question. At present, to solve the fundamental problem, only to take remedial measures, such as the use of aluminum substrate to deal with insulation (the original aluminum substrate has not been insulated, and now almost all done) may not be understood. Single LED insulation, little effect, there are many problems when the series.

3, the problem of LED pulse resistance and the manufacturers are still controversial, in my practical application does exist, the main reaction in the cold pulse, that is, the power of the moment, a few LED in the cold state of the electricity that is the breakdown or break. I think it is not static or high voltage (boot voltage range).

4, LED light angle problems due to the various manufacturers of packaging LED lens is not the same as if the same light angle (nominal angle), the effect is not the same, the condenser selection difficult, even not universal.

5, LED potentially blinding hidden LED luminous point makes the brightness of the center is super concentrated, so it is easy to hurt people's eyes, although some lighting manufacturers make efforts in this regard, but due to regulatory lag, it is only for a person's moral issue.

6, LED heating problems in theory, LED not so hot, but due to the current technology is not mature, LED fever is known to all.

7, LED efficiency is low (luminous rate) at present LED electric conversion efficiency is too low (because there is no instrument test, dare not give specific data).

8, LED brightness is not enough brightness, so that the current LED in the lighting industry can only act as a supporting role, mainly used for decoration.

9, LED light and life of the mainland or Taiwanese LED produced by light and life is a serious problem, and the heat of solution quality, the driver, are likely to affect the life and the life of LED, so 100 thousand hours is also a selling point! 10, LED drive power supply problems at present most driving lines are borrowed from the switching power supply, there are a few lines is designed for the LED driver, but basically the same effect, because the LED need to adopt DC drive, constant current control, the drive line is quite huge, can not be compared with the electronic transformer, but also the efficiency of relatively low, reaching 80% with good (single is not up to).

In addition, manufacturers for the pursuit of applicability, claiming that a driver can take a ten (just pick one, two, can be), but this is actually a mistake, although is a constant current, the starting voltage is too high will often LED death in an instant.

11, LED modeling is limited due to the characteristics of LED single side lighting, making the shape of LED lamps subject to certain restrictions.

12, the price was too high a LED 1W-3WLED imports mostly to around $3, but also made more than and 10 dollars (poor quality, no intellectual property) a 6 LED about lamps sold into the hands of consumers, about 1000 yuan, do you want to buy a color TV set or to buy lamps.