What is difference between the isolated of LED driver and non-isolated of LED driver?
The work flow of Isolation of LED driver as follow:
Input power 110Và rectifying à filtering  à switch transistor of ICà High-frequency transformerà  geted output voltage.The contact is isolated between the output side and input side by transformer. so the security.
Non- isolated LED driver is used capacitance + Resistance To reduce the voltage. But it still has high voltage(with input 11V) after reduce the voltage.

used in the low voltage led lamps,the lamps have 110V, who had touched the danger of electric shock.Very likely People is danger of electric shock when touched the led lamps.

Summary:

Non isolation: input and output power of common ground.

Isolation: input and output power with no common ground, a transformer separated.

 Ir led strip can be done barbecue?

Infrared wave has longer lengths (radio, microwave, infrared, visible light. Wavelength  in order from  from long to short），the impression is feeling the heat, the effect is produced by thermal effects,
what kind of level is reach when then the infrared transmission? If the infrared can penetrate to theatomic, molecular internal, so will cause the atomic, molecular enlargement and can lead to the disintegration of atoms, molecules. This is really the case? As a matter of fact? Infrared frequency is low, the energy is not enough, the ir led could not achieve effect that atomic and molecular disintegration .
Therefore, the infrared can only penetrate the gap of the atoms and molecules, and can not penetrate to the internal of atoms, molecules. because the infrared can only penetrate into the interstitial of atoms, molecules, will cause the vibration of atoms and molecules to accelerate, distance to big,
increasing the thermal energy, from a macro perspective, the material in the melting and boiling in, on vaporization, but the nature of matter (atoms, molecules themselves) did not change,this is the infrared thermal effect. So we can use this infrared excitation mechanism to barbecue food, make organic polymer degeneration, but cannot use the infrared ray generated photoelectric effect, but can not make the nuclear internalchange.

The paint of Infrared heating led strip
A high-quality paint of ir led strip:   adopts imported special baking technology with short wave infrared heat lamp , baking infiltration, straight into the paint, so the temperature of paint rises rapidly, the evaporation of water from the inside to the outside ,

Excellentgloss and fullness to the paint surface, the mirror is more clear，and Excellent adhesion,i s not easy to produce the “orange peel, tears” phenomenon, avoid rework, and greatly improve the work efficiency.
Second,  high efficiency and energy saving:
1  high efficiency: the powered can run at full power in 3Second,  high electric heating conversion rate reaches above 95%, The ir led strip use …
2 energy saving：the ir led strip life of up to 6000 hours. Third, lightweight and convenient: Infrared heating led strip may need to be flexible and adjust the height and angle. can be carried out in different parts of the car according to paint Infrared heating led strip may need to be flexible to adjust the height and angle can be carried out in different parts of the car according to paint;  this led strip  is also in accordance with paint  demand, do every thing possible to optimize the server of vehicle paint.

Automotive painting with ir led strip
Wall hanging type ir led strip

Spray paint When the car repair,generally use two-component paint, ensure the bright color, and not easy to fade. This paint chemical reaction depends on its Chemistry molecular to the drying and heating, the effect is not very good.
Far infrared penetration is very strong, can enter the paint layer directly, from inside to outside to finish drying process in a very short period of time, at the same time to keep intact paint colors of primary.because of the ir led strip has a distinctive character in the far infrared,
based on the combination of advanced technology developed on the baking equipment, to paint domain introduction of infrared heating technology, which has a strong penetration wavelength straight into the paint, so that the paint layer(body shell) temperature rises rapidly generate self-heating effect,coating moisture (or solvent) is rapidly from the inside to the outside, when the volatile chemical paint is same,paint bond resonance surface increase due to aggregation amplitude,so that the probability of vibrational frequencies draw the
crosslinked polymer is increased,the acceleration curing of  lacquer paint. Ensure that the paint drying and heating should have high efficiency, environmental protection and energy-saving features requirements. Therefore. The gloss of paint surface and high fullness, mirror more clear, coating adhesion, is not easy to produce the “orange peel, tears” phenomenon, avoid rework, cost savings, improve efficiency.

ANALYSIS OF THE INFRARED LED CHIP APPLICATIONS(2)

Infrared light emitting diode  to control the controlled device when Infrared light emitting diode emitting infrared, controlled device has a electric conversion elements of corresponding infrared,
such as an infrared receiver diodes, transistors and other optoelectronic. as we use it that Emission and receiving of infrared  has paired two tubes. An infrared transmitting and receiving in two type, one is direct emitting, the second is reflective emitting.
the direct emitting and reflective emitting placed in opposite ends of a transmitting terminal with receiving terminal there a piece between the direct emitting and reflective emitting;and They tied together, usually receiving tube always no light, only to encounter a reflection in the infrared light emitted by light emitting diodes, receiving tube receives the reflected infrared light was working.Double infrared emission circuit, can improve the transmitting power, increase function that  the infrared emission  distance.
 According to the characteristics of the infrared LED chips, based on different wavelengths can be more widely used, such as:

1 Wavelength: 940nm, suitable for remote control, such as household electrical appliance remote controller;

2 Wavelength: 808nm, suitable for medical appliance, space optical communication, infrared lighting source, pumping solid laser

3 Wavelength: 830nm, automatic card system is suitable for high-speed road (night vision system is best, can see a little red, tube core is better than that of 850nm)

4 Wavelength: 840nm, suitable for color zoom IR waterproof camera

5 Wavelength: 850nm, suitable for the camera (video) digital photography, monitoring,building intercom, burglar alarm, infrared waterproof, ir led strip

6 Wavelength: 870nm, applicable to shopping malls, at the crossroads of camera

Analysis of the ir LED chip applications

Ordinary infrared LED and the ir led strip is similar,
but infrared LED can emits infrared. Its pipe pressure drop is generally about 1.4v, the working current of less than 20mA.In order to adapt to different working voltage, the circuit is limited current with series resistor.The infrared transmitting to control the controlled device corresponding, and transmitting power is proportional to its distance control. In order to increase the control distance of infrared, infrared light emitting diode is working on the pulse condition（PWM）, because the pulse of light (light modulation) the effective transmission distance is almost directly proportional to the current of pulse,just try to improve the peak Ip, can increase the transmitting distance of infrared light. Improved Ip method, is to reduce the pulse duty ratio, namely the compressed pulse width(T), some color TV infrared remote control device, the work pulse duty ratio of infrared emitting tube is about 1/3-1/4; some electrical appliances infrared remote control, the duty ratio is 1/10. Reducing the pulse duty cycle can also make emission from low power infrared light-emitting diode is greatly increased.
Common infrared light emitting diode, the power is divided into small power (1mW-10mW), medium power (20mW-50mW) and high power (above 50mW-100mW)three categories. To make the infrared light emitting diode produces a modulated light, only in the drive pipe pulse voltage with a certain frequency.

Whether LED will emit infrared？

An old friend emailed me to ask.
Q:LED claim to not emit infrared and ultraviolet light, but I holding a ceramic of 40W COB LED in yesterday, my hand lamp glass nearby, lit by hand there is a feeling of heat, and the heat from the thermal radiation source of LED only. How you see it?

My reply: Any object will emit infrared radiation(bring infra red heaters), and LED is no exception. The so-called LED spectroscopy without infrared, refers to its can not radiate infrared spectroscopy band directly.     However, due to itself having a certain temperature, so the LED chip or the led package will be send some infrared.

In the case of LED, has been the different between the two:* the emission of infrared and *ordinary surfaces emit infrared.
LED’s surface because of the temperature (as long as the case is not absolute zero) emitting infrared, there will be emitted infrared excitation PN junction（just like  Ir Led Strip）. In Currently seen red LED test report is true. Other light-colored LED is still no actual test report.Do not think that the cold will not emit infrared light. your home TV remote control with infrared emission is a cold light source, it emits is infrared.

Infrared light for physiotherapy  

In generally Infrared physiotherapy lighting led size is larger, power is also big , about 100 ~ 300 w,Physiotherapy of infrared lamp is visible（Longer wavelength light, “should also be longer than the wavelength of red light）, it not only has the infrared, containing a large amount of visible components, which mainly issued heat that contains a lot of infrared, with brighter light. the frequency of radiates is high, strong permeability, infrared wave peak strictly in the 1300nm, so that the the wavelength of the infrared can penetrate the human body just dermis, to promote blood circulation, enhance the absorption capacity of joint muscle tissue inflammation, relieve the symptoms of arthritis, promote the healing of soft tissue injury.cooperate on body cosmetology and chest cosmetology  , Contribute to more effective ingredients and absorption of effective ingredients.  Therefore, the Infrared led strip to become one of the beauty salon for Breast and Body . At the same time rheumatoid arthritis has a good curative effect.

The matters needing attention:

1, Irradiation distance is subject to feel comfortable.

2, Do not lookt the infrared lamp directly.

3, Pay attention away from all kinds of flammable items,Pay attention to ventilation cooling equipment.

4, Do not touch the infrared light while the infrared light is in use(Is high temperature) 

Talk about that LED light source
Because the LED light source belongs to the spot matrix, it’s combination form light-emitting diode arrangement.
so that any one single LED module is a point light source, and integrated with the LED downlights, spotlights led etc. are regarded as point light source. The ideal state of point light source is a single luminous body and emitter to emit light in all directions, like sun not have sunspots, star in this category is called a perfect point source.We used to live in the point light source are generally light bulbs, lamp beads. Even if they only have a 180 ° angle of the light-emitting surface.in our life The point light source used high power led, led cob, light bulb, lamp etc.. Even if the light-emitting surface they have only 180 degrees angle.LED point light source is the most used light source. energy saving and server time is the best light sources at present. LED operating voltage is very low (about 1 V); the working current is very small (mA can be light); and the good performance of the seismic resistant, impact resistance and high reliability, long service life; current intensity through the modulation(with PWM) can be easily modulated by luminescence intensity.
LED is called the fourth generation light source, with energy saving, environmental protection, safety, long service life, low power consumption, low heat, high brightness, waterproof, shockproof, miniature, easy dimming, beam focus, easy maintenance, can be widely used in various directions, display, decoration, backlightin, general lighting and other fields.LED with high electro-optical conversion efficiency, easy dimming(adjust light), color variety, low operating voltage, repeatedly switching not destructiveness of led life, less heat, durable, small size, high brightness, concentrated light beam stability, no delay to start, etc.

But it also has the same problem we need to solve, the LED initial cost is too high, color difference, low efficiency, high power LED constant current driving. To make a long story short, compared with the traditional light source, LED light source is bound to replace the traditional light source advantage products, as ledlightmake has a shaky enterprise, light up the world.

How to select the high power LED and LED light source?
High power led lamp beads and led light source selection method should be from about 9 aspect to analyze:

1, LED brightness
LED brightness is different, the price will be different.Spotlight: General brightness 60-70lm;
Bulbs: general brightness 80-90lm.

Note: the 1W brightness has 60～110 lm, 3W brightness can up to a maximum of 240 lm, 5W-300W is integrated led chip, using series parallel connection to contain a new led integrated chip (package), mainly to check  how much current, voltage, and may be connected in parallel, series, or any combination thereof.
1W red light brightness is 30～40 lm in generally;
1W green light brightness is generally 60～80 lm;
1W yellow light brightness is generally 30～50 lm;
1W Blue ray brightness has 20～30 lm in generally;
LED lens: a lens with the general PMMA, PC, optical glass, silica gel (soft silica gel, hard materials such as silica gel).the angle bigger is better  (the means light efficiency is high), with a LED lens small angle, light to shoot far.

2, Antistatic ability
Antistatic ability of LED, long life,so it’s higher prices. LED of Antistatic usually greater than 700V can be used for Decoration LED lighting.

3, The wavelength
The same wavelength LED, color consistency, such as the requirements of the color line, the high prices. No LED spectral separation device manufacturers is difficult to produce pure colors.White light is divided into warm color (color temperature 2700-4000K), white (color temperature 5500-6000K), cool white (color temperature above 7000K) Europeans prefer warm white.
Red: Band 600-680, 620, 630 which is mainly used for stage lights, 690 near-infrared
Blue-ray: the band 430-480, 460, 465 stage lights which use more.
Green: band 500-580, 525, 530 stage lights which use more.

4, Leakage current
LED is light as one-way conductive, if there is reverse current. it is called leakage, the leakage current of LEDis large, short service life, low price.

5, Light angle
LED light emission angle is not the same when Different uses. Special light-emitting angle, and higher prices.

6, Life(server time)
Different quality is the key to life, life is determined by the light fades. Small Light decay, long life,and high price.

7, LED chips
LED luminous body for the LED chip, different LED chips, prices vary widely. Japan, United States’LED chips is more expensive, Taiwan factory and China’s domestic LED manufacturers of LED chip prices lower than Japan and the US.
8, The chip size
The length of a side express the size of the chip, in generally the led chip size as:38-45mΩ, quality of big LED chip  is better than small LED chip.price  is proportional to its Chip size!

9, Colloids
LED ordinary colloidal generally epoxy resin, adds features（a UV LED and fire agents） more expensive, high-quality outdoor LED lighting should be proof-UV and proof-fire.