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.

More features of energy saving LED light source
Led  light  source  characteristics

Can be programmed and control multiple  simultaneous changes, can be realized simultaneously colorful, transition, scanning, Water lights and other full color changing effects. It is also can be a plurality of point light source composed of dot matrix screen, change the a variety of pictures, text, animation and so on; with low power, long life(long service life.) and other characteristics.

Led light source functionality
 Led light source and LED display can be controlled by the computer  for real-time transmission of advertising information, advertising video, free to replace the advertising content, while the higher pixel LED display, display accuracy is correspondingly higher, close the effect better, led spot light display

is also quite good visual effect in remote viewing, to meet the needs of  distance vision of large-scale advertising, neon billboards change relatively monotonous, can not be real-time transmission and replace the advertising content, poor functionality.

Led light source using a variety In different occasions
   Led light source can be used not only dot matrix display，but also can be used for housing, bridges, city lighting project outline the buildings, hotels, hotels and other places of entertainment, indoor decorative lighting project, has a great market prospect(market potential.).

LED point light source of environmental protection

Green Lighting is the world follow the eco-design goal, LED is the LED point light source of a high efficiency and energy saving, no mercury filled, can reduce energy consumption and reduce greenhouse gases and other pollutants into the atmosphere, LED can also be used in combination with solar cells, it is one of the most environmentally friendly source of led light source.

LED point light source — Taking LED as a point light source of luminous body
The concept of led light source:LED point light source is to use LED as the point light source, LED point source(led spot light) belongs to one of the artificial electric light source. LED light-emitting diode, is the use of semiconductor pn junction, the homogeneity heterogeneity PN junction, the metal semiconductor junction (MS), a metal insulator semiconductor (MIS) node of the light made of light-emitting devices. The working principle. The working principle it works on the same principle as other electrical properties of generally crystal diode, however, different crystal materials used.

At present, LED point source LED including visible light; not visible light, laser and other different types,the common light of life is visible light.
Light-emitting diode light color depends on the materials used, there are a variety of colors yellow, green, red, orange, blue, purple, blue, white, full-color, etc., can be made into various shapes such as rectangular, round and so on. LED has the advantages etc., LED has a long life (LED servier time),small volume, light weight, low power consumption (energy), low cost, and low operating voltage, high luminous efficiency, light response time is very short, wide working（operating） temperature range, color pure, firm structure (impact resistance, vibration resistance), performance is stable and reliable and so on a series of characteristics, so people favor.Because LED luminous body close to the “point light led light source”, lighting design is more convenient, however, if a large area display, current and power consumption are larger. in General LED lights can be used in electronic equipment, digital control, display boards and other display devices and opto devices, is also commonly used decorative optical communications, as well as building outlines, amusement parks, billboards, streets, and other places of the decoration stage.

The Parameters of Led point light source
1, Electrical characteristics
  Including volt-ampere characteristics, allowing power consumption, response time, the capacitance – voltage characteristics.

2, The optical performance characteristics
 Including spectral characteristics, with light distribution characteristics, mainly for the brightness or lumen value, the light fades, loss of efficiency, luminous efficiency, consistency and optical distribution characteristics. Usually adopts the peak wavelength and half brightness, describe the spectral characteristics of the spectral distribution.

3, Thermal of properties
  Heat-related characteristics reflect the junction temperature change, resistance, etc. led light source with high brightness LED as the light source, long life, low function,  die-casting aluminum lamp body, PC lamp shade, green environmental protection. Like the stars in the sky, give a person infinite daydream.
The use of dots of matrix combination theory, the use of LED digital programmable controller computer system to realize the different types of animation (Gif, Flash), dot matrix text, graphics (JPG, BMP), and various lighting effects.

(B).The Led point light source technology parameters:

Light source: high brightness LED

LED color: red, yellow, blue, green, white, RGB, YW

Working voltage: DC12V/110V

Working temperature: -40~50 °C (-40~+50 °C)

Protection grade:IP65

Driving way: constant current

(C).Led point light source material:
*The lamp body is made of die-casting aluminum，

*lamp shade for the PC material，

*material polyester prism through the mask heat sink design

*aluminum body rubber seals

(D) .The application scope of Led point light source:
For entertainment, outdoor advertising signs (door), large office buildings, landmark buildings and indoor and outdoor decorative lighting and so on.

Power: 2W

Casing material: PC

External diameter: 5-200mm

(E).Led point light source installation

1. The first available screws or glue fixed mounted light fixture desired position.
2. Follow the installation drawings connect the power lines and signal lines, and the waterproof treatment.

Installation note issue:
A. Note that supply operating power supply coincides with led light source.

B. Light body will be connected between the signal line and the controller properly. The Power line of controller connected to provide normal power supply.

C.Be prepared (Waterproof treatment)for connect power line and signal line.

What reason is caused Dead lights of LED point light source lamp？ For details, see below.
The leakage current of LED point light sources are caused by excessive PN junction failure.In generally LED chips are injury by static electricity, the PN junction LED chip failure, leakage current increases,the LED light source will turn into a resistance, this usually does not affect the LED point light source and other work. which generally does not affect the work of other LED point light sources.Prevent electrostatic damage to electronic components, is a very important work of the electronics industry, LED packaging, application of the enterprise must not be taken lightly.  Any one part of problem, will cause damage to the LED light source, LED light source to the bad performance or even failure.LED spot light lamp wiring open solder joints causing death.LED point light source connection solder joint make Dead lights by Open circuit of light.Internal connection wire of LED point light source is disconnected,resulting in the death produced when not have current inflow of the LED lights, this situation will affect the normal work of other LED light source, the reason is the low voltage operation of LED light source, the general should use string, parallel to join, to adapt to different operating voltages, More series of LED light source draw the influence of LED light source series.can use a weld method In such a situation,Will not bright LED light source with a lighter LED lead is heated to 200-300 ℃， remove the lighter, with 3-volt button batteries connected LED by positive and negative,  if LED light source can be light, but with the lead temperature reduced By the light turns the not bright, which proves that LED point light source is weld.the reason of Heating can light is based on the principle of metal thermal expansion and contraction, elongation and internal solder connected with the expansion of LED lead when heated, when the power is switched on, the LED point light source can be a normal lighting.The two way cause of Dead lights phenomenon of LED point light source lamp. But only to comply with the using rules of LED point light source, the above two phenomena can be avoided.

How to layout the LED lighting project, creating environment of exquisite luxury Home Furnishing!

The indoor lighting of Home Furnishing should coordinate with different number of LED lights, different LED lights, and different LED lamps, in addition to the master of light, to the visual health, light source The use of requirement, but also have different design styles. You can use light to regulate the master feeling for indoor light . You can also take advantage of well-being Tones to decorate the room.Doors, lobby, corridor lighting,this is the first impression when entering the room, but also reflect the effect of one of the standard interior decoration, so LED lighting Generally used in small LED bulb, LED ceiling lamps or a square LED,about size, specifications should be with the overall matching. Sometimes the owner will be arranged in the doorway LED spotlights lamp, door and hallways or other rooms should have a primary ，followed by points, while the lobby is a public place, his cloth lamp is very important, so you can choose the Bright LED Downlight as first choice, so look magnificent, luxurious fine!