The ceiling lamp is arranged on a lamp holder on a ceiling by the lamp cap that extends out;to this end, we took a pair of ceiling lamp to make a simple dismantling.
A view of the base plate
Lens of ceiling lamp
Information of lamp PCB board
Constant currently IC
Calculating method for led required power
And up until now buying many species of led, we’ve been concerned about how many work power the led module can get. with these 0,25W、0.50W.75W、1W as exemplifications of led power calculation.
*1.480×0.25=120W，together with power dissipation, comes to around 135w, the hourly usage of 0.135 kilowatt.
*2.480×0.5=240W，together with power dissipation, comes to around 260w, the hourly usage of 0.26kilowatt.
*480×0.75=360W，together with power dissipation, comes to around 390w, the hourly usage of 0.39 kilowatt.
*480×1=480w，together with power dissipation, comes to around 510w, the hourly usage of 0.51kilowatt.
led factors method
A typical led application of three elements.
1、led Cleaning ,
We are need to handle these clean led with chemical. because Some chemical may have a bad reaction to those led and the chemical may cause slight discoloration, they include trichloroethylene (trichloroethylene) and acetone.dipping and ethanol alcohol are ideal cleaning methods.and don’t exceed 3 second under common temperature.
2、led over-current protection
Another considerations for using led:limiting the use of one type over-current protection circuit to limit output current,and by changing the size of the current sampling resistor to regulate the size of current-limiting value.
The calculating formulas are gived:R=（VCC-VF）/IF
VCC as power voltage, VF as work voltage of led , IF as work currently of led
3、welding conditionas
Soldering condition has great effect on the performance of led module.
Soldering by soldering iron:the temperature of soldering iron no more than 300℃，the welding time no more than three second, The surface of led should be at least two millimeter higher than the position of the welding location.
Wave soldering: compatible with lead free soldering.the temperature of soldering iron no more than 260℃，
the welding time no more than five second, The surface of led should be at least two millimeter higher than the position of the dip soldering location.
LED Chip’s Application Study in the led production.
LED not working alone. another critical piece of led production is LED chip. what use does it have?
*LED chip has high voltage of constant circuit which supply constant output current for led.
*LED chip ability to weather an switching time of led which is led EN pin by LED chip , and the switching frequency can meet 1 MHz. whose reaction speed is very high. and can support the high color gradation changes in high frequency output(PWM output).
* There are those LED chip includes detect circuit. damage status that does occur should be readily detectable and accessible for inspection and repair .to optimize the measures of improving reliability in order to achieve the purpose of the reliability of planning.
What factors concern you most when you’ll buy led power supply?
Which the led power supply transforms electricity energy into light energy. in generally ,the input source of led power supply include
industrial frequency alternating current(AC), source of direct current(DC). the following points should be consideration when choosing and designing your solution.
1．High efficiency: LED is save energy production, so the led power supply must have high efficiency.
2. High power factor: high power factor is another important requirement of the power network to load.
3.Driver way: led power supply divide into constant voltage and constant currently.
5．Surge protect: it is intolerable for the led who capacity of surge protect.
6．Protection function: besides regular protection function such as currently protection, you will also find more protection function such as “temperature protection”. requirement! Come according to the standard of protocol and want to accord with national level and electrical Safety .
The user enters this world in a sticky situation: the high power led isn’t working! the user hope that they shall never again have to undergo such unpleasant experience. but user had an unhappy experience occasionally. we look into the issue.
High power led modules is the nested assembly that contains the second filament.what is filament? an electric light passes electricity through material called a filament. we are also call gold thread. when using, one end is directly connected with an positive pole and the other end is directly connected with a negative pole. the large current will cause serious harm of filament.
the power support for led
LED is light device of low voltage direct current constant current source.The semiconductor properties of the led are what allow to generate light. so led must require the recombination of p electron and hole. in led design, decision of plan according to product requirements and specifications.
the most important design step of these is power support(determination power supply way).
AC power support:
to convert the high frequency AC power , and generator into steady DC voltage, it would provide a constant currently source for the led.
Rechargeable battery:
The design solution by a rechargeable battery that can be charged via optional solar panel for perpetual use. or using that Built-in rechargeable battery. in here we not have to worry about electricity, because of led light with minimal power consumption. so rechargeable battery is also a good choice.
the led instrument
There are many types of instrument,such as: electromagnetic therapy instrument, digital therapy, ozonic instrument, and led instrument, of course.
The principle of the led instrument is a led instrument of setting led light shining on skin . then then instrument can change the structure of skin cells. the led instrument were often high purity and high power density of led. red light led ,blue light led and yellow light led is generally used.the led structure has advantages that they kill the bacteria will also bring harm to the new collagen elastin and collagen. so the led instrument can accelerate the growth and induct tendency of cells.
If you’d like more led production information, view the web site: www.ledlightmake.com
LED bracket of Requirement
With the development of led technology, and high led has been gaining ground. so LED bracket start should be widely applied.but led experts noted : We found a bigger difference for processing technique of the COB bracket and PPA bracket . From a manufacturing or sourcing perspective, led engineer will want to use a EMC bracket , the EMC bracket has already been used for more than PPA bracket. to take over to drive 3W high power is no problem. and EMC bracket is headed for the direction of more high power led (for example:5W high power led).
Chromaticity coordinate of led
Coordinate: . It means “absolute position of a certain point in a plane coordinate system. zero points to be the origin. then you want to j positioning a specific location within the plane coordinate system. which indicates that the method: A（X，Y)；
led chromaticity coordinate: precisely. color chromaticity coordinate designates the color chromaticity coordinate in chromaticity diagram. sensitive color of retina has RGB(red,green,blue), from the three colors red, blue and green, all other color sensations can be made .mixed in varying proportions, they can produce all colors. that mix process is reflected in this chromaticity coordinate.