Why does led lamp not close properly?

With a slightly light after close led lamp, why does led lamp not close properly? the mainly reason is the electrification of zero line. that does happened very often. the problem from installer. they didn’t operated according to the correct operation rules. they didn’t put the live into electrical plugs (electrical plugs have one live wire , one neutral wire and one earthe wire)，and control switch with neutral wire.   although the switch is off, But live wire still have a little current is flowing. that make that the led lamp has a slightly light. solution: adjust the electricity wire position and direction for the best status of control.

If led lamp is a slightly light, call a repairman immediately. then you  would like to tell me what happened

a Great Epoch of led Wafer

The big era of led wafer has come.
For respond to market require and shifts, the led maker has been promotion of wafer production line(from 2 inch,3 inch,4inch to 6inch) , other led manufactory has now taken on an even bigger challenge.( start initial layout of 12inch,wafer production line). anyway we are except that increase of led wafer yields and improvement of led cost structure. the breakthrough marked the beginning of a new era.

requiring the AC (Alternating Current), whether in home、schools or other place . AC of the very important system in our live .  now the led even quotes Alternating Current.
The work currently is moving toward a certainty direction, when turn-on forware voltage increase. toward currently by making led work. the work currently is flowing the other way when turn-on reverse voltage increase. and you will see them on the other side of the led to generate light.

control led by PWM module

We are know that PWM(pulse width modulations) is normal technology for control led . but there are has some body is not clear which work principle . All right, we want to do one more at simple PWM example here.

We are put the a second divided into pieces of one thousand . a pieces of work time is one millisecond . then we will make that led lit one for 7 millisecond and lit off for 3 millisecond through led controller . in this sense, the led only work for 0.7 second in one second . due to there was a faster interval for state transition, so our eyes can not found led flash.all we saw was about the light is rather dim.

Through this way , we can be control led bright.

LED wafer

The led wafer is key core of led. in fact, the wavelength , bright , input forward voltage of led depends on led wafer.led production process is performed under led wafer. so wafer technology is import for led.

what is led wafer? Now that we had a brief overview of wafer , raw material of water is silicon. water is silicon wafer that it have been used for silicon semiconductor integrated circuit. this wafer shape was regular circle. a single piece of semiconductor material that has been cut from a slice by scribing and breaking. a wafer can be made into a variety of specifications for the electricity circuit (include led module).

Research of relationship between phosphors and white light led

The influences of white light LED packaging process on its performance are discussed in previous chapter. in here we will continuous of discussed other way—converted to white light with phosphors. Before that, we could have been review principle that the ultraviolet light strip is then converted to white light by phosphors on the surface.

Then The three other color match were: blue led + yellow phosphors
blue led + crimson phosphors and green phosphors
uv led + RGB phosphors

Red light led and Blue light led

Many people suffer from acne and angst.how do I prevent acne? but you should be know that Red light led and Blue light led can be treated for acne. and it is Safe and efficient, without side effects. red light led to work in close conjunction with blue light led.

blue light: kill germs and help regulate the immune system.
red light: anti-inflammatory ,making the generated fibrous cells,reduce the formation scar.
clearance can reached up to around eighty percent when together the two form a powerful combination.

Based on hybrid control theory to make white LED with RGB
We have discussed that blue light and phosphor make white before. today we will using other way to make white LED.
Human’brightness sensitivity of Three-color light sources is different when using different wavelength RGB to drive LED.in here the brightest is green light , secondly, is red light, and the weakest is blue light.and do they make white light? the answer is yes. we can make white light with different ratios of RGB light , the percentages of RGB light was red light 30％、green light 59％、and blue light 11％. the bright equation is : Y=0.30R+0.59G+0.11B.

LED flicker

Flicker is a common problem when led working ,Every led user are interested in the issuer. following we are talk about led flicker. first you will know that flicker is not relationship of led source, flicker from led drive circuit .Due to the alternating current characteristics of artificial lighting source, its light outputin all exists certain stroboscopic.Research on Glitter Phenomenon of led Based on People’s Physiological and Psychological Reflection —- the eyes are indisposed when distinguish flicker rates low than 50 Hz.

Advantage and disadvantage of led constant current IC

In currently, the led constant current ic is performed in series high frequency pulse(PWM) to LED.

PWM control technology is the most popular technology in constant current IC. the human’ eyes can’t feel flicker-free(the factory always say: LED work in pure DC and flicker-free, eliminating the visual fatigue by traditional strobe light) , the reason is that PWM frequency is so high. the design full coincidence of Ergonomics ,and it can save power energy.

But the work frequency of constant current ic in 100KHz~500KHz, so the IC suitable only for small power LED.