月份：2012年5月

what are led bulbs for cars

For cars use, LED structure is a small chip is encapsulated in epoxy, in general, its operating voltage is 2-3.6V, the operating current is 0.02-0.03A, is a way to convert electrical energy into visible light semiconductor, it changed the incandescent tungsten light and energy-saving lamp base toner light principle, and use electric light. With long life, high luminous efficiency, radiation and energy-saving advantages. Its inherent characteristics it is the ideal light source to replace the traditional light source, it has a wide range of uses. what are led bulbs for cars? Due to the needs of the automobile exterior design, the aerodynamic requirements and aesthetic needs, as well as the concept of environmental protection, people will use LED lights in the instrument lights backlight display, front and rear turn lights, brake lights, reversing lights, fog lights, reading lamps and other functional aspects, but also have a decorative function, transformation to achieve glory.

what are led bulbs for cars? The good points of car led bulbs are listed below.

what are led bulbs for cars
1. Response time is short, without delay, the traditional glass bulb bulb is 0.3 seconds of delay, to prevent rear-end, to reduce accidents.

2. With enhanced seismic performance, because the LED is completely encapsulated in epoxy resin inside it than light bulbs and fluorescent tubes are sturdy.

3. high luminous purity, without shade filter, wavelength error of less than 10 nm.

4 small, light-emitting heat lamps materials, heat resistance requirements are not high.

5, Beam angel, easier to control, and do not need to reduce the depth of the lamp with reflector concentrator.

6. Low power consumption and energy utilization up to 80%, to reach the traditional light bulb the same brightness, power consumption is only 6% of the traditional light bulb, power-saving fuel economy.

7. Long life, the filament structure is not heat, no glass, tungsten and other vulnerable moving parts, the failure percentage is very low, maintenance-free under normal use within more than six years.

8. vehicle control circuit is not easily oxidized.

9. Small size and light weight. Various types of lamps can be designed to slim and compact car design space.

10 environmental protection and green lighting. No excess infrared, UV spectra of the LED spectrum, without mercury-containing hazardous substances, heat, radiation, more suited to the requirements of the green car.

Although the LED has been widely used in the car, but the LED is a multi-compound semiconductor components, electrical, optical, thermal and mechanical parameters of highly discrete. what are led bulbs? Therefore, the design should take full account of this characteristic, the components of automotive LED light source and led street light to strict classification, grading.

 

what are led light bulbs and white led

what are led light bulbs? The white LED lights source lighting with green, long life, energy saving, small size, light weight, quick to respond, low operating voltage and good safety characteristics, known as the 21st century green replacement for incandescent, fluorescent and energy-saving lamps. LED white light is a variety of ways, are now widely used and has achieved industrialization is the launch of the white phosphor coating on the LED chip. Because LED uses three methods to achieve white light of fluorescent powder, technically does not fully mature, so severely limited the wider application of white LED lighting in the area.

what are led light bulbs and white led

There are 3 different methods to achieve white led, then you could know what are led light bulbs.

The first scenario is Blu-ray excitation of the yellow phosphor coating a blue LED street light chip, the principle is the blue chip issued by the yellow light and fluorescent powder complementary to the formation of white light. However, the principle disadvantage of this program is the phosphor emission spectra of the Ce3 ion with the characteristics of a continuous spectrum, therefore, poor color, luminous efficiency is not high enough, it is difficult to meet the needs of low color temperature lighting, in order to solve this problem must be improved through the development of new highly efficient phosphor.

The second option is the blue LED chip coated with green and red phosphors, the principle is issued through the chip emits blue light phosphor green and red compound obtained white, so color is more better. The drawback is that this program of phosphor conversion efficiency is low, only to improve the efficiency of red phosphors can be improved.

The third program is the three primary colors or multiple color phosphor coating in the violet or ultraviolet LED high bay chip, the principle is the chip launch the long-wave ultraviolet light (was 370nm-380nm) or violet (380nm-410nm ) to stimulate phosphor to achieve white light emission color of this program to be better than the previous two programs, but the effective conversion efficiency of the phosphor is also low, and red and green phosphors generally sulfide system, so this kind of luminescent stability of the phosphor, the light fades larger. Only to develop more efficient, low-light decay of LED phosphors in order to achieve higher conversion efficiency.

what are led light bulbs and white led? After reading this article, you would know.

what is a led bulb with different circuit

what is a led bulb? LED in the commercialization of specific applications often need dozens or even hundreds of LED combinations together,  constitute the light emitting device, the LED load circuit connected directly related to the reliability and service life of LED components. This is because the LED circuit can work safely, and its basic function has two aspects: First, to maintain a constant current. Second, the drive circuit should be kept lower power consumption, in order to make the efficiency of the LED high bay system in a high level.

what is a led bulb with different circuit
A wide range of LED in the form of the connection circuit are listed below: series, parallel, series parallel combinations. Then you would know what is a led bulb.

1, Series: The series circuit is the number of the LED cathode to anode connectedclusters, the advantage of operating current through each LED are generally required tostring together with the current limiting resistor. The drawback is that this circuit requires apower supply higher voltage. Voltage equation and the circuit current using the following formula:
V total = LED VF = VF1 + VF2 + VF3 … + VFn
I = total individual LED IF value

2, parallel: parallel circuit is the number of LED cathode and anode, cathode andanode parallel connection, which is characterized by the operating voltage of each LED, total current is ΣIFn, in order to ensure that each LED current IF. needs consistent with the forward voltage of each LED. However, this circuit drawback is that the power supply can provide a higher current. Voltage equation and the circuit current using the following formula:
V total = VF value of each LED
I total = each LED IF =, IF1 + the IF2 + IF3 … + IFn

3, series / parallel combination of: the LED connected in series / parallel combination ofform, the biggest benefit is you can significantly reduce the impact of VF inconsistent. Also, we should be reminded that,   changes in the composition of the array form or LED street light number should also be timely adjustment of the current limiting resistor. Appropriate current limiting resistor in order to effectively control the current in the circuit configuration in the circuit. Of course, the series / parallel combination circuit causes the output current with the input voltage and ambient temperature and other factors, a significant change occurs.

This is the answers of what is a led bulb.

what are the best led grow lights in printing

What is the LED printer? In fact, it has been available for some time, the manufacturer uses infrared LED light source, to create an LED array directly to the digital data into the optical information to hit the drum, but the resolution failed with a laser printer was comparable. However, due to the structure of the LED printer is cheap, do not need a laser printer using the focus lens, refraction, lenses and other components, products can be lightweight and inexpensive. Then what are the best led grow lights, LED Printer?

what are the best led grow lights in printing

LED printer print principles and laser printers are similar, they are using optical technology will turn the digital data into light information to hit the drum, and then by the toner, you can print out beautiful the file. LED street light printers have the advantage of more than a laser printer is the structure needed to lay down complex optical structure, the LED printer product volume per pound laser printer is much smaller, and can use simple LED array with optics, LED printer warm-up time is short, direct print mode, reducing the time of the paper road, also reduced the perspective of fine-tuning of reaction time, a substantial increase in the speed of the print output than mine laser printer and inkjet printers are faster, but with the advantages of low distortion and high precision.

In addition to quickly print the advantages mentioned in the previous principle, As the LED printer is less in volume , they will be able to incorporate more complex function in product design, to create a multi-functional commercial affairs. what are the best led grow lights ? LED printer is the same as the inkjet printer using the horizontal feed, which makes using the media more and more space to play.

The other hand, LED printer is able to make small printhead by excellent semiconductor process technology and the characteristics of LED, in fact the LED can cater to print fine degree of product durability, long-term use down, the life of the LED components than a laser printer, what are the best led grow lights ? but also have the advantage of lower power consumption, even with the heat low, the configuration of the cooling components is relatively reduced, not only reduce the production costs of LED, machine-generated noise is also low, the overall improvement of energy-saving effect and the product durability, environmental protection done, regardless of the great effort.

The short term efficient LED lighting squandered, but long-term is a huge opportunity

In the short term, the new efficient led lighting are squandered, but in the long term, this is a great opportunity for LED lighting. It makes avoided the constraints of the electrical lighting within 100 years.

Compared with incandescent and compact fluorescent’s light-emitting and inefficient, the LED Lights has a huge advantage. Compared to conventional incandescent and compact fluorescent lamps, LED may be bring more complex factor, as weel as more interesting and useful lighting pattern. In order to obtain these advantages, they would have to order LED lighting fixtures. LED can provide the adjustable color temperature, brightness and intelligent control, additional features.

Just try to imagine this lighting, it can not only dim, but also select the desired color temperature. In other words, you may want to enhance the light intensity or increase the color of light in the room. Efficient led lighting is the only spectrum lighting with sufficient space-tunable light source. Although this technology is feasible, yet to creat a way to the adjustment with intuitive user interface is challenging. Who are able to design a simple control adjustable color LED lighting will have a unique competitive advantage.

Another possibility is to improve the level of lighting, especially in the office area. The people’s eyes (after 40 years of age) began to lose their ability to focus, even those with excellent eyesight should wear glasses to improve vision when they are at 40 to 50 years. However, in many cases, those people may do not need glasses to improve eyesight where they are at outdoors, because they human eyes will see more clearly in the intensity lighting conditions. When the efficiency of LED street light reach 150lm / W level, to improve office lighting to 1000lx is possible, rather than the current conditions of typical office 300lx.

When people began to consider the constraints of conventional lighting, the opportunity of efficient led lighting will be get. The typical home lighting household would be able to withstand the current circuit of 20A. If all of the ceiling lighting fixtures are replaced with LEDs, a 10A (or even less amps) would be sufficient to provide lighting for the entire house. Moreover, because the LED products is essentially a low-voltage devices, desgin engineers can use almost  any voltage lighting circuits. Converted to 12V or 24V DC system will eliminate the great cost of the wiring on the roof of a large number of standard wiring, especially in the current, the price of copper is much high.

what is a led light bulb with different power supply?

Although the LED is good at energy saving, but the LED street light source can not directly use the utility grid voltage, it must be equipped with dedicated voltage conversion equipment provided to meet the LED rated voltage and current in order to make LED to work properly, is the so-called LED high bay power supply. what is a led light bulb?

what is a led light bulb with different power supply?However, due to a variety of different LED power performance, so choose a suitable, efficient LED special power supply, can be truly revealing the high performance characteristics of the LED light source. Because of the low efficiency of the LED power supply needs to consume a lot of power, will not be able to highlight the energy-saving characteristics of the LED to the LED-powered.

LED power supply according to driving methods can be divided into two categories:
A constant current drive circuit driving the LED is very satisfactory, the drawback is that higher prices. The constant current circuit although not afraid of the load short-circuit, but is prohibited to load completely open. what is a led light bulb?
To limit the number of LED use, because it has the largest withstand current and voltage values.   A voltage regulator circuit to determine all the parameters, the output is a fixed voltage, output current changes with the changes in load.

Second, the LED lights power circuit structure can be divided into six categories:
The conventional step-down transformer:
The advantage of this power is small, the downside is the weight of emphasis, the power efficiency is very low, generally 45% to 60%, reliability is not high, so rarely.
Electronic step-down transformer:
The power structure of the inadequacies of conversion efficiency is low, narrow voltage range, generally 180 ~ 240V ripple interference.

The PWM control switching power supply:
At present, the LED power supply of the PWM control mode is ideal, because this switching power supply output voltage or current is very stable. what is a led light bulb? High power conversion efficiency can generally be as high as 80% to 90%, and the output voltage and current is very stable. LED power of this approach consists of four parts are: part of the input rectifier filter, the filter portion of the output rectifier, PWM regulator control section, the switching energy conversion part. Protection measures, such circuits are well belong to the high reliability of power supply.


what is an led light bulb from Eneltec?

Just a symbol of human civilization, and the LED street light is the new light source in the 21st century, the LED is very much in line with modern ideas: green, health, environmental protection, energy saving, long life. Then, what is an led light bulb? Although the LED compared to the incandescent lamp has a stronger adaptability and life, but in the application and use should be noted that the following requirements to ensure the LED can be a stable, long-term work properly. the voltage and current Not recommended the parallel use of the LED, because even the same model, the LED operating voltage of the same batch have some differences, unless to do a current sharing. Super bright white LED is installed, have anti-static facilities, ultra bright white LED damage by static electricity even when the naked eye can not see out, will reduce the service life. If the LED operating voltage changes 0.1V, then the operating current of 20mA about possible changes. Typically using a series limiting resistor can also use a simple constant voltage circuit, the aim is to achieve automatic pressure limiting current limiting to prevent damage to the LED Grow Lights.  what is an led light bulb? Ordinary LED peak current of 50 ~ 100mA reverse voltage of about 6V LED application to pay attention to when designing a circuit, the peak voltage and current do not exceed this limit. (Special except for high power) when the peak voltage of the circuit is too high may damage the LED. the welding conditions A soldering iron: Manual welding, soldering with a soldering iron and requires less than 25W (up to no more than 30W) soldering iron, and the temperature of the soldering iron must be kept no higher than 300 ° C is generally recommended in the 260 ℃. Soldering time not more than 3 seconds. dip soldering: Requirements of cutting-edge temperature of 260 ° C dip soldering, dip soldering time is not more than five seconds, the location of the dip soldering at least 2 mm from the gel. what is an led light bulb from Eneltec? what is an led light bulb? Note: After welding, the temperature of the LED products down to room temperature be handled with care. Do not use hard objects and sharp objects to scratch, Sassafras, touch, squeeze, press the LED.

Why energy saving led lighting save energy?

LED street light bulbs will be soon widely used in the future of household lighting, in street lights, outdoor signs and offices because of its energy-saving and environment protection. Why energy saving led lighting save energy?

Monochromatic light of high brightness LED has made great progress in markets. Although they are more expensive than traditional light bulbs, their advantages can be offset by its higher price. First of all, In order to achieve brightness, a red LED light will consume 15 watts, while the traditional bulb will have to consume up to 150 watts of energy. In addition, according to scientists testing, when LED power light, 10% of the energy can be transformed into light but only  7-8% of the conversion efficiency of incandescent bulbs. Taking the above information into consideration, in order to achieve the same lighting effects, LED lights than incandescent energy saving is obvious.

Of equal importance, the key strength of energy saving led lighting is reduced power consumption. LED circuit will approach 80% efficiency, which means 80% of the electrical energy is converted to light energy. The remaining 20% is lost as heat energy. Compare that with incandescent bulbs which operate at about 20% efficiency (80% of the electrical energy is lost as heat). Realistically the cost savings would be higher as most incandescent light bulbs blow out within a year and require replacements whereas LED light bulbs can be used easily for a decade without burning out.

In real money terms, if a 100 Watt incandescent bulb is used for 1 year, with an electrical cost of 10 cents/kilowatt hour, $88 will be spent on electricity costs. Of the $88 expense, $70 will have been used to heat the room, not light the room. If an 80% efficient LED high bay system had been used, the electricity cost would be $23 per year – there would be a cost savings of $65 on electricity during the year.

It will be interesting to see what developments are coming for more residential applications of energy saving led lighting. LED lighting technology has been researched and developed for the past two decades We in the industry are certain that tomorrows LED lights will last longer and consume even less power than todays energy efficient led light bulbs. LED lighting will be used to replace virtually every type of light, bulb, and lamp that is currently in use.

The color quality is perhaps the most difficult problem for new led lighting

LED street light manufacturers also have to face their new problems. Perhaps in the shop windows, the new led lighting has been abandoned. With the rapid improvement in SSL, the listed time is critical. Although the actual design time is shorter, but to obtain the required certificate from the US takes a few months.

Design engineers to select those that may take several years manufactured LED must remain cautious. Because LED products use the same package, LED manufacturers can easily release a higher flux of lighting. With the rapid development of LED chips, LED packing technology keeps the pace. And the LED performance improvements will have an equally important role. LED manufactures are extremely clear, and subsequently extended the life cycle of their products. In addition, if possible, it will make new led lighting with the previous model and the same PCB.

The color quality is perhaps the most difficult problem. The industry has spent a lot of time and money in the color variability of measurement and control. For manufacturers,  chroma storage, like OSRAM ANSI, spend more and more. But the color temperature and compact chroma isn’t the all problems,  because with the same chromaticity coordinates of light source may have different optical wavelength. If the spectral differences, the two different non-white surface will come into being.

Typically, the LED light has the same chromaticity coordinates, which is not a problem, because their spectra are very similar. That is to replace incandescent with an new led lighting. This is a potential problem. Because the great difference of the LED spectrum and incandescent spectrum.

Color efining index (CRI Color Rendering, the Index) is a measure of the closeness of the perceived color of a surface lighting with the same surface in a given lighting of color under incandescent indicators. CRI of 100 is a perfect match. While CRI of 80 is good, but the more discriminatory consumer may not think so.

OSRAM introduced by the increase red LED products Brilliant,Mix in the green – white LED. When the red with green-white mixed, it will produce white spectrum incandescent spectrum to match more white spectrum. Especially in the end of the red LED. Because usually here the conventional white LED bulbs color will drop. The result is a higher efficiency of lighting and refined color index.

what is led bulb of LED package

No matter what type of LED to the need for different types of design package, because only the packaged end products in order to put into practical application. what is led bulb?

what is led bulb of LED package
Why LED package ?
The LED package will lead to the electrodes of the LED chip, not only to protect the LED chip, and serve to improve the luminous efficiency. LED packaging is not just to complete the output signal is more important is to protect the normal work of the die, the output of visible light function. Shows both the electrical parameters of LED packaging, and optical parameters of design and technical requirements, is not a simple task.

2.LED package devices
Require a higher LED Street light package, therefore, whether the DIP LED or SMD LED must use high-precision solid crystal, because the location of the LED chip into the package is accurate and will directly affect the luminous efficiency of the whole package devices . If the location of the chip in the reflector cup is biased, the light can not be fully reflected, direct impact on the brightness of the LED. However, using an advanced PR System (pre-image recognition system) solid crystal machine, regardless of the quality of the lead frame difference can still be accurately LED chip soldered on a predetermined position.

3.LED package form
According to different applications, different dimensions of the cooling solution and the glow. LED packaging a variety of forms. At present, the LED package the classification of the Lamp-LED TOP-LED, Side-LED, SMD LED, High-Power-LED high bay, Flip Chip-LED, etc.

SMD LED (Surface Mount LEDs)
SMD LED is attached to the circuit board surface, suitable for SMT processing, reflow, and a good solution to the brightness, angle, flatness, reliability, consistency and other issues, the use of lighter PCB board and the reflective layer materials improved to remove the heavy carbon steel pin DIP LED, display the reflective layer need to be filled with epoxy resin less aims to reduce the size, lower weight. Product weight of the surface mount LED can be easily lightened by half, and ultimately make the application more perfect. what is led bulb?

High-Power-LED (high-power LED)
In order to obtain high power, high brightness LED light source, manufacturers, high-power direction of the LED chip and package design to development. At present, able to withstand the number of W-power LED package. Multi-chip combinations such as Norlux series of high-power LED package structure of hexagonal aluminum base (non-conductive), the base diameter of 31.75mm, the emitting area is located in the center part of a diameter of about (0.375 × 25.4) mm can accommodate up to 40 LED die, aluminum as a heat sink. This package using conventional die combination of high-density package, high luminous efficiency, low thermal resistance, high optical output power at high current, but also a promising development in LED solid-state light source.

what is led bulb? Visible, the power LED thermal characteristics of a direct impact to the operating temperature of LED luminescence efficiency, emission wavelength, life, power type LED chip package design, manufacturing technology is even more important.