LED lamp refers to the use of LED (light emitting diode) as light source lamp. Because LED has the advantages of high brightness, color rich variety, low power consumption, long service life, LED has been widely used in the automotive field. LED lamp profile LED lamp production requirements LED lights will become the future market mainstream characteristic of vehicle lighting LED lamp development and classification of domestic LED lights the bottleneck of the development of domestic LED lamp prospect Brief
introduction of LED lamp
Now the car lights had incandescent lamp, halogen lamp, xenon lamp etc.. In addition to headlamps, other lamps such as lights, litter lights, car lights is the use of incandescent lamp etc.. But in recent years also popular at LED as indicating lamp, such as brake indicator light, turning indication lamp etc. Why the instead of incandescent lamps with LED? The outer cover can be made with the PC pipe, maximal temperature up to 135 degrees. Greatly improve the light transmission effect, enhance the impact resistance!! Resistance to weak acid and neutral oil. Effective period of 20 years. The original advantages of LED are significant compared with incandescent lamps,
First is the long life, generally up to tens of thousands hours, even one hundred thousand hours. Some people think that if the car lighting the use of LED in future, the whole car use period without changing the lamp.
Secondly is very energy-efficient, more than half of the same brightness of the incandescent lamp energy saving at least.
Thirdly is the high quality light, basically no radiation, which belongs to the “green light”. Fourthly is a LED has the advantages of simple structure, the internal support structure, seal around with epoxy resin transparent, good seismic performance.
Fifthly is not need hot start time, lighting fast response (nanosecond), suitable for fast moving objects using.
Sixth is applicable at a voltage of 6-12 volts, can be applied in automobile.
Seventh is the LED occupancy volume is small, the designer can transform lighting mode freely, auto modeling diversification. Automobile manufacturers favor LED, is completely determined by the advantages of the LED. This is LED lamp production requirementsFirst according to the standard optical design need of light shape requirements, including the LED brightness, distribution of light beam, design of beam angle。 Although LED can save energy and has the advantages of small size, but the beam angle of narrow and LED heat treatment is higher requirements, so LED is used as the lamp on the processing of the need to pay particular attention to the uniform light. Another is heat treatment for LED, if the heat do not, will not only affect the life of LED, but also lead to LED appears in the light emitting device attenuation, based on two restrictions, LED lamp has not been very good development, only a few top grade car assembly. Secondly LED quality control and check of light production coordination, it is relatively simple when compared to the headlights, lights require. But the main thing is to solve the problem of uniform light LED, namely, how to make uniform distribution when output of the LED light, and good heat dissipation problem solving of LED. LED lamp is dong after need to do some performance testing and 3C certification,LED lamp will become the market mainstream of vehicle lighting in future.
With the continuous development and evolution of LED technology, its applications in the automotive industry have been more widespread. However, the current LED companies in the lights, backlight, lighting and other three major application market is still in the development stage, certification, lean on demand that this year industrial growth contribution is not big, but along with the industrialization speed, the next LED companies in the lights, backlight, lighting and other three areas have a large number of applications.

The difference between downlights and spotlights.

Many people are confused for led of Downlights and spotlights,
what distinction between the downlights and spotlights? What position should be applied to Home Furnishing ?and what is different effect of applying? We will talk about the downlights and spotlights Base on the questions above。Simply to think, the downlights led lamp is lighting a lamp compared to ordinary bright outfit is more focused,  usually used for general lighting or auxiliary lighting.spotlights lamp is lighting a highly condensing, which light is to specify a specific target. And it is mainly used for special lighting, such as emphasis a new place on a very good taste.

We will be talk about the distinguish downlights and spotlights from the several aspects.

1, from the source to see downlight can be replace the incandescent bulbs, and can also be replace energy-saving lamp. Incandescent lamp is a yellow light. Installed energy-saving lamps as lighting types (can be white or yellow light). The direction of the ceiling downlights light source is not adjustable. Common household lamp is used in quartz bulb, or lamp. Of course, large lamp is not necessarily used quartz bulb. Quartz bulb only yellow light. But the direction of the light source lamp can be freely adjusted general.

2, from the application location: downlight are generally installed in the ceiling, the general ceiling needs above 150mm can be installed. Of course, there are also external type lamp. downlight region is a very good choice In the absence of dome light or pendant mounted, respect to soft compare with the spotlights light lamp. In generally spotlights lamp can be divided into orbit, hanging type and embedded type etc.The spotlights Lamp with transformer, but also has without transformer. The embedded lamp can be installed in the ceiling. Tht spotlights Lamp is mainly used for the need to emphasize or performance, such as TV wall, paintings, jewelry and so on, can be made to enhance the effect of light.

3, from the price: point of view the same grade, The spotlights lamp is expensive compare with downlight lamp.It must be noted that, lamp generally cannot be used for lighting wool fabrics, nor near flammable obstacles, otherwise easy to cause fire. Although the spotlight more power but at a proper position has its decorative effect is not the same. The colorful lamp and lamp cup decorated, have a distinctive style.

LED solution LED heat dissipation— aluminum substrate design choice of LED circuit design, in order to better solve the problem of heat dissipation, LED and some high power IC needs to use the aluminum base circuit board.Aluminum substrate is composed of PCB circuit layer (Tong Boceng), heat insulating layer and the metal base layer. Circuit layer requirements with current carrying capacity greatly, thus should use thick copper foil, thickness of 35 um~280 um; thermal insulation layer is PCB aluminum substrate of core technology, it is generally composed of special, polymer filled by special ceramic thermal resistance is small, the viscoelastic performance is excellent, has the ability of anti aging to withstand mechanical and thermal stress of IMS-H01 IMS-H02 and LED-0601 PCB high performance aluminum,The heat insulating layer and substrate is the use of this technique makes it has very good thermal conductivity and high strength electrical insulation properties; metal base is a support member aluminum substrate, is required to have high thermal conductivity, the general is aluminum plate, also can use of copper (the copper plate can provide better thermal conductivity), suitable for drilling, punching and cutting and conventional machining. The process requirements are: gold plating, tin spraying, OSP oxidation, lead-free ROHS process etc.. Material: aluminum substrate product features: The insulation layer is thin, small thermal resistance; non-magnetic; good heat dissipation; high standard thickness of mechanical strength product: 0.8, 1, 1.2, 1.5, 2, 2.5 copper foil thickness: , 3.0mm 1.8um 35um 70UM 105um 140um features: with high heat dissipation, electromagnetic shielding performance, high mechanical strength, excellent processing properties. Usage: LED special power hybrid IC (HIC). Aluminum substrate is carrying LED and device of heat conduction, heat dissipation is mainly dependent on the area, concentrated heat conduction can choose to board with high thermal conductivity, such as the United States Beggs sheet; slow heat conduction or heat domestic material can be. The price is difference , Beggs sheet to produce the finished product probably need 4000 / square meters, general domestic materials 1000 /square meters. LED lamp general use voltage is not very high, the choice of 1mil thickness of insulation layer can withstand voltage greater than 2000V. Radiation reference design methods: why thermal design? The effects of high temperature on electronic products: insulation performance degradation; damage to components; aging materials heat; low melting point weld cracking, the welding points off. Effect of temperature on components: generally, temperature resistance is reduced; the high temperature will reduce the service life of the capacitor; decline in the performance of high temperature will make the transformer, choke coil insulation material, general transformer, choke coil allows the temperature lower than 95C; the temperature is too high。

Battery driven single LED, wide application of miner’s lamp, flashlight, emergency lights and other products. can find 20-400mA fixed current in led market. we will talk about LED backlight LCD driver ic. It is a very large size and according to the backlight LCD linear LED representation of the driver IC, linear IC power design as well as the feedback sampling automatically adapt to LED; VF value; 4 channel of LED constant current output, consistent with the R/G/B color combinations of 3:6:1 with high color rendering requirements. Can be applied to the high requirements of back light,The current market sales in good condition, more and more manufacturers adopt. The utility model has the advantages of simple design, simple circuit, convenient application, gray performance is currently the world’s one of the best (level 65536). The drawback is, these IC need large power supply and high cost for design.
The cost of power supply part is higher than LED driving part.
at present ,application of wash wall lamp, stage lighting, the screen lighting(seek higher requirements light ). Gray is very important performance factor for design in LED IC in the future. Single channel high power LED constant current DD311 driver ，it is the constant current driver for a single channel LED output, built-in current mirror and the current switch component, is designed for driving large power LED chip. it can drive up to 1 A input current (sink current), and through the adjustment of the reference input current (IREF) to arbitrarily set the size of the output current. The output current value is about 100 times of IREF, IREF by adjusting the external resistor or bias (bias) voltage to set the fine-tuning or make the bias voltage can be corrected LED light. it has achieved overall brightness at the same time adjustment. The output of the led chip can withstand voltage up to 36V, connecting application support multiple high power LED series. Built in output enable terminal (Enable), can easily achieve high gray scale application of high power LED. Features: the maximum output current: 1A (by the reference input current IREF settings) minimum output voltage requirements: 1V (when Iout = 1A) maximum output under voltage: 36V (output channel leakage current of less than 0.1uA).

FPGA
Landscape lamp in the traditional sense with a control box, single-chip, ARM control, color changes, only seven kinds of light color change mode,There is a single way on the led changes, and has limit for hardware control system speed.microcontroller family of embedded controllers PWM (PulseWidthModulation) generally only 3 to 6-chanle, if the need to expand only using software PWM. Function, can not meet the requirement of high speed transmission of data.control of LED lamp with FPAG system or C/OS2 II operating system Especially when the LED lamp for a long time to fade in and fade out, will cause jump process obvious in entire process of fade in and fade out. In order to let the eye looks no jumping, to achieve the gentle fade in and fade out effect, must rely on a powerful processor to complete the requirements. The system uses Nios II soft core embedded into the FPGA based SOPC(SystemonProgrammableChip) method, Nios II soft core processor on a PWM independent control of R (red), G (green), B (blue) light gray to control landscape lamp, landscape lamp control implementation of LED full-color display.The communication mechanism between multi processes in the business field, has obtained the successful should Using [526]. The use of programmable SOPC technology and C/OS2 II operating system is a good choice for the design of control system of LED landscape lamp.
system function description
The system is composed of a display unit, a display drive unit, control unit, data communication unit,Figure 1 system structure diagram
Using Nios II soft core with FPGA, by C/OS2 with real-time operating system by using the signal way by changing the PWM (pulse width modulation) duty cycle to achieve control the [7] scene playing on LED lamp group, showed the least 256 colors, with static, gradient, light gradually, gradually dark, flashing 5 types of change
Type and effect of full-color dynamic changes. Data communication unit by CF (CompactFlash) card, the lamp control data file of PC send out to control system. Control unit put the transmits light control data of PC into memory, to fetch and analysis data from the memory,the analysis and processing of finished lamp control data sent to the LED lamp driving unit, display unit control is realized by multiplex channel PWMA variety of change scenarios of LED lamp. The display drive unit is a custom Full color lamp control IP core, each IP control of a lamp through PWM. lamp control data show a scene change effect through the PWM port. Display the core device unit for three color LED tube, color with red, green, blue, produce various other different colors.

According to the design of Audi LED headlights tears eyebrow lights, it is at the side of ordinary automobile (especially the left side) to install at least one side led lamp for road lighting side, The edge-lit lighting fixtures have a wide range of lit and low cost, using the installation of car sidelight lamp will greatly reduce night will be cars, overtaking traffic accidents .

To prepare A long 30 / 60CM, two with a line (30CM length of only one cable), which could be a group of three pcs led. Recommend a car to buy two! !

Color of lighting: white, blue, red, green

Uses; Universal tears LED Light (all models of car can be installed)

Material: 335 side-emitting, each lamp reaches more than 1000MCD

Length: 30CM / 60CM

Width: 0.6CM high 0.2CM (Universal Ultra Slim, specializing in tears Design)

Background(pcb color): black
First with 12V battery power to test tears led lamps, no problem and then start the installation,
the correct way is to remove the lamp strip after careful paste from the package inside the inner edge in the headlight, direct fixed! The power directly in parallel with the width lamp (lamp power line) can be, no direct (through the fuse) to connect the battery power supply!!!
Features: side-emitting light bar (also called tears), either brightness or effects can to replacing the old front SMD light bar of illuminated; this light bar can be arbitrarily cut (3 LED lights a group of cut),can mounted in any position。 Now there are many riders install door rail, light eyebrows or relatively narrow place, this section can choose light bar (regardless of length, width, thickness are the best), easy to install (the back of a double-sided plastic)!

1. Surface sealant

2. waterproof rating of IP68, suitable for indoor and outdoor use

3.DC12V voltage

4.The rugged, high shock resistance

5. The low-power, high-brightness

6. No radiation

7. The flexible, compact size, easy to install

8. Life: 10,0000 hours
9. Can withstand temperature: -20 ℃ to 50 ℃, operating temperature: 5 ℃ to 50 ℃

As to improve LED performance, the power supply will also become a substantial part of the capability of the LED lamp. So to choose high quality components for power supply is an import thigh. Now we will talk about this.
PCB:
full use of first-class quality fiberglass board, non-cardboard, glass and other half-second material.
Component layout alignment:
The PCB layout and quality components is import and reasonable reason that related to design of product reliability and quality; the same material, different on PCB board layout, the final effect of the product is not the same; products with reasonable structure, in the simulation of transport and drop test, have an excellent performance when the anti interference test on the job; in the design high （AC alternating current）and low voltage complete isolation, safety distance is greater than the international standard 6mm, more to enhance the safety of the product.
Capacitors:
Capacitance using temperature -40ºC-105ºC, long life, international companies producing original brand products, mainly ruby, Black Edition, TOCON, YALECON other brands.
ledlightmake company integrates scientific research, production and sales, the company set up under the development department, production department, quality inspection department, various departments to strictly layers and responsible attitude, make the company’s products occupy a space for one person in the fierce competition in the market; rely on strong product quality to win led Markey and old customers the consistent high praise!

Different switching power supply parameters are not the same, but most of the constant voltage of the switching power supply has a power matching function (with bleeder resistors), will be based on your load to adjust the current, which is in his case to ensure that the voltage supply on the move, power is automatically adjusted according to the load current to output the required power, so you can go to test and check that the power supply .to validate if the power supply is appropriate for led strip. And verification method is also very simple. Common chips of led strip are the following: 3020,3528,5050 and so on, the common 3528 lamp beads per meter 30 beads, 60 beads, 90 beads, 120 beads; 5050 lamp beads 30 beads, 60 beads, 72 beads;
but the most common way is 3 serial links and, according to the circuit connection mode can be calculated easily out of current, such as 3528 of the 60 bead light strip, is also 3 string and 20 parallel, according to each 20MA current, this current is 20 * 20=400MA, at this point, you can use the multimeter to measure current, see whether can meet the requirements, if conditions permit, you can the stability coefficient test power supply current, drive more stable is also more suitable for the LED lamp strip (because LED lamp beads are demanding constant current when LED lamp just work)!

The classification and choice of power supply LED
There are many kinds of classification methods of power supply:
According to the different output divided into constant voltage, constant current;
According to the characteristics of the input divided into general series, and high power factor series;
According to different purposes is divided into waterproof series, and is not waterproof series; According to the circuit structure is divided into different series of isolated, and not isolated series;
According to the control mode Divided into control mode adjustable light series, and adjustable light series.
LED has numerous advantages，in that case, environmental protection, long service life, photoelectric conversion efficiency, The LED life in the 10 Million hours Above But in the actual application process, Because of the design of driving power supply and driving mode selection is improper, or with LED Light does not match, draw the LED to damage or decay, Reduced LED The reliability of the lamp. Due to Different LED Manufacturers and LED specifications，output Current and Voltage also are different Now with white light LED for Cases,
In accordance The variation rules of the current and voltage. In general application of forward voltage 3.0-3.6V About, The typical value of voltage 3.3V Current 20mA,
When forward voltage more than 3.6V After The forward voltage is very small increase , LED The positive power Flow may have doubled up, draw the LED body temperature rise too fast
To accelerate LED Optical attenuation and Make LED Life shortening. Even be likely to burn LED.
According to the variation characteristics of LED Voltage, current。Put forward strict requirements on the design of driving power supply。

Now, share some experience that the LED lamp strip driving power
The intelligent LED lamp control is one of the advantages, and the power supply is the key of intelligent control.Intelligent control in LED street and LED tunnel lamp lighting application conditions most mature and the most obvious effect, intelligent control can control in different time, to realize stepless adjustment of lamp power according to the road traffic density, can meet the application requirements, and realize the enormous energy-saving effect, saves a large amount of funds for highway administrative unit. The application in the tunnel lighting can not only saving energy, can also according to the brightness of the situation outside the tunnel automatic adjustment of the tunnel entrance brightness, for the driver to provide a visual transition stage, in order to ensure driving safety.

1, giving up four or more outputs, develop single or two outputs, high current and large current to abandon the development of a small current.The more complex of outputs, the cost solve is very high current interference between the different way, if not solve high failure rate. Further more the total output current is greater, and the current is mainly due to the heat, the voltage itself does not lead directly to heat, heat and electric current is proportional to the square,, that current is increased 2 times than the original , then, the amount of heat will increase 4 times than the original, the original current is increased to 3 times, heat will increase to 9 times than the original. In summary, single or two-output LED light strip power failure rate will be much lower.
2, cooling and protection are the main external factor of a power failure.Not only the power supply may have a heat, lamps will be heat, How reasonable to heat dissipated is a matter of lighting design engineer must consider , must prevent the formation of heat, heat island effect, influence power life. Using separate power program is a good choice.
3, to give up power, super power, select a higher stability of small power supply.Because of the greater the power, the more heat generating by components,, which is also more compact components, is not conducive to heat dissipation, and the temperature is the culprit of a power failure. Furthermore, relatively small power development is more mature, stable and cost has advantages.
In fact, many large power supply are not tested over time and practice, are hastily implemented projects are experimental products, so that the failure of endless. Compared with small power supply for early development, technical solutions are more mature.