Analyze the problems of high-power LED in the application of LED lighting industry
1, LED color difference problem
There is basically no chromatic aberration problem in the application of a single LED, but if a large number of LEDs are put into use together or one lamp has multiple LEDs at the same time, the chromatic aberration problem is highlighted. First, a group of lamps is seen, if the lights are seen at a glance The colors are inconsistent. Although LUXEON divides the LEDs into eight military regions according to the color temperature, and then divides several cells to the right in each military region, to a certain extent, the large-scale chromatic aberration is controlled, but the same color region is in the same batch of LEDs. There are still differences, and the difference still cannot escape the provocation of the naked eye.
2, LED insulation problem
(Insulation refers to the heat sink substrate for the positive and negative electrodes of the LED) We dare not say that we are the first to find the insulation problem of LED, but at least the big-name manufacturers are surprised by our doubts. The fundamental problem is to take remedial measures, such as using aluminum substrates to handle insulation (the original aluminum substrate is not insulated, and now almost all). It may not be understandable. A single LED is not insulated, and the effect is small. There is a problem.
3, LED anti-pulse problem
This problem is still controversial with the manufacturer. It does exist in my practical application. The main reaction is on the cold pulse, that is, at the moment of power-on, a few LEDs are broken or disconnected at the moment of cold power-on. I don't think it is static electricity or Caused by high voltage (starting voltage is in range).
4, the problem of LED illumination angle
Since the LED lens packages of different manufacturers are different, even if they are the same illumination angle (nominal angle), the effect is not the same, making the selection of the concentrator difficult and difficult to use.
5, LED potential blinding hidden dangers
The LED lighting point is too concentrated to make the center point super bright, which is easy to hurt people's eyes. Although some lighting manufacturers are making efforts in this regard, due to the lag of regulations, it can only be a moral issue for people.
6, LED fever problem
In theory, LEDs don't heat very much, but because of the immature technology, LED fever is well known, I don't want to say more.
7, LED efficiency is low (luminosity)
At present, the LED's electrical conversion efficiency is too low (due to the lack of instrument testing, dare not give specific data).
8, LED brightness is insufficient
Insufficient brightness makes LEDs only play a supporting role in the lighting industry, mainly for decoration.
9, LED light decay and life
At present, the LED light decay and lifespan problems produced by mainland or Taiwanese companies are more serious. First, the big-name manufacturers such as LUXEON have a nominal 100,000 hours. I am afraid that they are only psychologically clear, and the heat dissipation is good or bad. Matching can affect the light decay and life of the LED, so 100,000 hours is just a selling point!
10, LED drive power problem
At present, most of the drive lines are borrowed from the switching power supply. Of course, there are also very small numbers of lines that are specifically used for LED driving, but the effect is basically the same. Since the LEDs need to be driven by DC, constant current control is adopted, which makes the driving lines quite large. Can not be compared with electronic transformers, and the efficiency is relatively low, reaching 80% is not bad (single can not reach). In addition, manufacturers in pursuit of applicability, claim that a drive can take ten or so casually (one, two (..... can be), in fact, this is a misunderstanding, although it is a constant current, too high starting voltage will often kill the LED in an instant.
11, limited LED shape
Due to the characteristics of LED single-sided illumination, the shape of LED lamps is limited.
12, LED unit price is too high
An imported 1W-3W LED is about 3 US dollars, and more than 10 pieces of domestically produced (poor quality, no intellectual property rights). A 6 LED or so left and right lamps are sold to consumers, almost 1000 yuan RMB. I would like to ask if you want to buy a color TV or buy a light.
(This article is reproduced on the Internet. The texts and opinions expressed in this article have not been confirmed by this site, nor do they represent the position of Gaogong LED. Readers need to verify the relevant content by themselves.)
There is basically no chromatic aberration problem in the application of a single LED, but if a large number of LEDs are put into use together or one lamp has multiple LEDs at the same time, the chromatic aberration problem is highlighted. First, a group of lamps is seen, if the lights are seen at a glance The colors are inconsistent. Although LUXEON divides the LEDs into eight military regions according to the color temperature, and then divides several cells to the right in each military region, to a certain extent, the large-scale chromatic aberration is controlled, but the same color region is in the same batch of LEDs. There are still differences, and the difference still cannot escape the provocation of the naked eye.
2, LED insulation problem
(Insulation refers to the heat sink substrate for the positive and negative electrodes of the LED) We dare not say that we are the first to find the insulation problem of LED, but at least the big-name manufacturers are surprised by our doubts. The fundamental problem is to take remedial measures, such as using aluminum substrates to handle insulation (the original aluminum substrate is not insulated, and now almost all). It may not be understandable. A single LED is not insulated, and the effect is small. There is a problem.
3, LED anti-pulse problem
This problem is still controversial with the manufacturer. It does exist in my practical application. The main reaction is on the cold pulse, that is, at the moment of power-on, a few LEDs are broken or disconnected at the moment of cold power-on. I don't think it is static electricity or Caused by high voltage (starting voltage is in range).
4, the problem of LED illumination angle
Since the LED lens packages of different manufacturers are different, even if they are the same illumination angle (nominal angle), the effect is not the same, making the selection of the concentrator difficult and difficult to use.
5, LED potential blinding hidden dangers
The LED lighting point is too concentrated to make the center point super bright, which is easy to hurt people's eyes. Although some lighting manufacturers are making efforts in this regard, due to the lag of regulations, it can only be a moral issue for people.
6, LED fever problem
In theory, LEDs don't heat very much, but because of the immature technology, LED fever is well known, I don't want to say more.
7, LED efficiency is low (luminosity)
At present, the LED's electrical conversion efficiency is too low (due to the lack of instrument testing, dare not give specific data).
8, LED brightness is insufficient
Insufficient brightness makes LEDs only play a supporting role in the lighting industry, mainly for decoration.
9, LED light decay and life
At present, the LED light decay and lifespan problems produced by mainland or Taiwanese companies are more serious. First, the big-name manufacturers such as LUXEON have a nominal 100,000 hours. I am afraid that they are only psychologically clear, and the heat dissipation is good or bad. Matching can affect the light decay and life of the LED, so 100,000 hours is just a selling point!
10, LED drive power problem
At present, most of the drive lines are borrowed from the switching power supply. Of course, there are also very small numbers of lines that are specifically used for LED driving, but the effect is basically the same. Since the LEDs need to be driven by DC, constant current control is adopted, which makes the driving lines quite large. Can not be compared with electronic transformers, and the efficiency is relatively low, reaching 80% is not bad (single can not reach). In addition, manufacturers in pursuit of applicability, claim that a drive can take ten or so casually (one, two (..... can be), in fact, this is a misunderstanding, although it is a constant current, too high starting voltage will often kill the LED in an instant.
11, limited LED shape
Due to the characteristics of LED single-sided illumination, the shape of LED lamps is limited.
12, LED unit price is too high
An imported 1W-3W LED is about 3 US dollars, and more than 10 pieces of domestically produced (poor quality, no intellectual property rights). A 6 LED or so left and right lamps are sold to consumers, almost 1000 yuan RMB. I would like to ask if you want to buy a color TV or buy a light.
(This article is reproduced on the Internet. The texts and opinions expressed in this article have not been confirmed by this site, nor do they represent the position of Gaogong LED. Readers need to verify the relevant content by themselves.)
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