The function feature of new energy led
1, The save power is obviously ,good environment
2,The work environment is in low heat and low voltage, so it is safely and reliable
3, It’s best light source in solar energy, and there are high efficiency,
4, There are special lanes in new-type light design ,The lights aspect is thin
5, The intelligence controller will monitor the work current
6, There are not glare ,light pollution , the lampshade is not perishing
7, The work voltage is windy , and there are not delay in start status, no flash
8, Good impact, anti vibration shock, there are not ultraviolet light and infrared light in the light source
9,High color-rendering index and good color rendering, multi-color temperature is optional

We are know that, the led will be lit when current through the led, and there are two kind of way to adjust the luminous of led. one is change current , other one is PWM In here, we are think that to adjust driver current of LED, because they are mostly positive proportion .both the led bright and led work current. but there are a question in here when change led bright through adjust forward current, the way also change light spectrum and color temperature when adjust led bright at time. that is reason it has color slanting. in general the white led was made by blue led and yellow phosphor .along with the bright of blue led was increased and the thick of yellow phosphor is invariant, it will increase the main wavelength of light spectrum. they are not problem for the normal light device . but there will are a flicker in small work current. unless the range of const current is width, for example the range between 0 to highest . that is all right. sample work in here , the small work current will trigger flicker when with current way to adjust led bright.

High power COB light source in application
The cob plate light source is light production as save power and friend environment, this integrate led chip packing on the aluminum substrate,
it has a lot of advantage for example , low heat resister, excellent dissipation heat, install convenient , adopting reflection plate surface as make light source soft and have large range of illumination ,no dazzle ,no uv light.

application area
supermarket , indoor, hotel , kitchen ,bedroom ,

Product process of cob chip
Putting the heat conducting epoxy resin covers the surface of the aluminum substrate, then put the silicon chip into the aluminum substrate, the silicon chip firmly fixing the aluminum substrate with heat-treatment,
then cilicon chip and the aluminum substrate build relation of electrical connection using wire welding

Advantage and drawback of high power cob

Advantage
Compare to single LED, the cob light source can save that once packing cost and twice grading cost. the same function in lighting device system,
the cob can cut down 30% cost of light source through actual measure,
this is great important significance to promote COB to application market.
in performance , via reasonable lens design , cob module can avoid dazzle,
in application, the product and install of cob module is simple and convenient, so it can cut down product cost. with the lighting market gradually increase , the cob light source will be mainly production .

The COB packing is more reasonable than traditional SMD packing. the COB packing is that single or various led chip pacing in to aluminum substrate.aluminum substrate for heat dissipation. the COB packing is low heat resister, the low heat resister lit well-distributed is the advantage .so the COB widely applicable to the lighting field

Attentions in use:
static electrical
The COB afraid static electrical, so ant-static electrical is necessary , especially the static electrical is bigger that max specified value. it will damage the cob. the user must adopted a resolution for ant-static electrical,

Welding

The power of welding machine be lower 20W and work temperature of welding machine is not higher than 300℃, the welding time no more than three seconds.

Clean COB
After welding please using ultrasonic to clean the COB
The COB packing is more reasonable than traditional SMD packing. the COB packing is that single or various led chip pacing in to aluminum substrate.aluminum substrate for heat dissipation. the COB packing is low heat resister, the low heat resister lit well-distributed is the advantage .so the COB widely applicable to the lighting field

Attentions in use:
The COB afraid static electrical, so ant-static electrical is necessary , especially the static electrical is bigger that max specified value. it will damage the cob. the user must adopted a resolution for ant-static electrical,

Welding
The power of welding machine be lower 20W and work temperature of welding machine is not higher than 300℃, the welding time no more than three seconds.
Clean COB
After welding please using ultrasonic to clean the COB

Talk about dual-color LED

The dual-color LED can lit light of two kind color
In general, there are three type of dual-color LED,

* Dual-color led with three pin
The dual-color led has three pin, the middle pin is common pin.
other pin correspond two color respectively
* Dual-color led with four pin
Echo side output one color respectively
*Dual color led with two pin
It just only has two pin, the follows are work status of dual color led with two pinThe positively of power lead to short ping and negative connect to long pin will generated one kind of color.The positively of power lead to long ping and negative connect to short pin will generated other kind of color.

The temperature and currently had influence with led
The led has influence on temperature and currently
Temperature effect
High temperature will cause low light output
The drift of led wavelength due to a variety of output color
Forward voltage will fall down
persistent herd for long time will cut down server time or cause luminous decay.

The currently effect
The drift of instable current due to a variety of color output
If the currently is beyond its normal range value will decrease server time.
The currently effect
The drift of instable current due to a variety of color output
If the currently is beyond its normal range value will decrease server time.

The reason of led damage
There are effect of service time in led light device. they are excess current and excess heat respectively,
The excess current is that the work current over rate current, it cause voltage impact .other damage way is over heat, the disadvantage will reduce service time of led. The invalid of led drive and the led itself as flawed will cause led break,
Those reason is mainly reason to break the led. in general , the excess voltage impact of input power and short circuit of electrical circuit will cause damage to the power and drive of led . and it also cause damage to the component. the short fault of short circuit may cause excess driver.the short circuit of driver electrical circuit will cause damage to the led . the test proved , this is close relate between the led perform and PN junction, the PN junction temperature of LED raise 10℃, the service time will reduce 50%
The rate current of common led is 20mA, the current was raise by various of use reason, and have not taken steps to prevent led, the current will over rate current and to damage the led.
First reason is that supply voltage raise suddenly. a particular component is in short circuit ,to make the a particular voltage
The upper paper is some reason of led fault.

Analyze heat of led

Analyzed the influence of rising the junction temperature of LED upon performance of LED

The heat question remains, we was fully aware of the problem.

because there are currently in the led, it will generates the joule heat and helps maintain the energy. then the heat is raised, it will rising the junction temperature of led and it will decrease transform rate of led .

So through increased currently to rising the luminous , it’s not right ,it’s not science

The eight mainly reason of led strip fault
The led damage from the improper package in transit
The false weld damage cause that pad has come off for shock in    transit
The welding tin too little cause that pad has come off
Adopt low quality of led strip PCB board , the led will break or come off when we bend the led strip
The copper foil and pad is separate when the bend angle is big on   install led strip, it also can cause led work break
The led strip is over-squeezed on install led strip, it cause damage to led ic(integrate chip)
The weld resistance layout too thick , so the weld tin can’t connect pad , the phenomenon belongs to false weld
When install led strip , please don’t bend the led strip, if the user over bend the strip will cause the pad of led strip come off