The components of the lamp is acted the role of knowledge sharing, LED energy-saving light bulbs, lamps and lanterns city of ancient town
- Aug 31, 2016 -
The composition of LED energy-saving light bulbs and other factors:
: 1. The voltage LED use the low voltage power supply, power supply voltage between 6 to 24 v, and varies according to the product, so it is a safer than using high voltage power supply, power supply, especially suitable for public places.
2. Efficiency: compared with incandescent lamp lighting energy consumption reduced by 80%.
Applicability: 3. Very small, each unit of LED is 3 to 5 mm square dice, so can be prepared into various shapes of the device, and is suitable for variable environment.
4. Stability: 100000 hours, droop for 50% of the original.
5. Response time: its response time of millisecond incandescent lamps, LED lights response time for a nanosecond.
6. Environmental pollution: no harmful metallic mercury.
7. Color: changes the current can change color, leds conveniently by the methods of chemical modification, adjust the material of the band structure and the band gap, red yellow green blue orange polychromatic light. Such as small current when the red LED, with the increase of current, can in turn into orange, yellow, and finally for the green.
8. Price: the price of the LED relatively expensive, compared with incandescent light bulb, the price of a few leds with the price of an incandescent lamp, and usually lights in each group should be composed of 300 ~ 500 on diode.
The working principle of
Light-emitting diodes (leds) core part is composed of p-type and n-type semiconductor semiconductor chips, between the p-type and n-type semiconductor semiconductor has a transition layer, called the p-n junction. In some of the semiconductor PN junction, the minority carrier injection with majority carrier compound will release excess energy in the form of light, so as to directly convert the electric energy to light energy. PN junction to add reverse voltage, minority carrier injection, so the light. Principle of the use of injection electroluminescent diode called light-emitting diodes (leds), known as the LED. (that is, when it is in a state of positive work plus forward voltage) on both ends, when the current is flowing from the LED anode to cathode, semiconductor crystal gives different colors of light from ultraviolet to infrared, the strength of the light associated with current.
The point of choose and buy
Choose LED light source from nine basic performance (figure)
As the rush market, as a consumer, choose LED, still need to be calm, scientific analysis, choose the best cost-effective light source and lamps and lanterns, the following introduce the basic performance of several kinds of LED:
1, brightness, the LED brightness is different, the price is different. Used for LED lamps and lanterns, the LED should comply with the laser level Ⅰ class standard.
2, antistatic ability: antistatic ability of LED, long life, so price is high. Antistatic usually greater than 700 v LED can be used in the LED lighting.
3, wavelength, wavelength of LED, the color is consistent, if request the same color, the price is high. Not the manufacturer of the LED light color separation instrument is not easy to produce pure color products.
4, leakage current, the LED is a one-way conductive lights, if there is a reverse current, is called the leakage, leakage current big LED, short service life, low price.
5, light Angle: use different LED light Angle is different. Special light Angle, the price is higher. Such as the diffuse Angle, the price is higher.
6, different life: quality is the key to life, life is decided by droop. Droop small, long service life, the price is high.
7, chip: LED lights for chip, different chip, price difference is very big. Chip is more expensive, Japan, the United States generally chips in Taiwan and domestic price is lower than the day, the United States.
8, chip size: the size of the chip to side, said big LED chip quality is better than that of the small chips. The price is proportional with the chip size.
9, colloid: ordinary LED colloid generally for epoxy resin, leds with uv radiation and fire retardant added more expensive, high quality outdoor LED lighting should be uv and fire prevention. Each product can have different design, different design suitable for different purposes, the reliability of the LED lighting design aspects include: electrical safety, fire safety, environmental safety, mechanical safety, health and safety, security, time and other factors. From the perspective of the electrical safety shall comply with relevant international and national standards.
Because of the LED is a new product, the national standard lag, but countries to provide product qualification testing. With international safety certification (such as GS, CE, UL, etc.) and the national product quality certification of the LED lamp price is higher, because these products on the safety design is reliable. The attention of consumers is to carefully identify certificate of authenticity, now has the international safety certification and the national product certification factory is not much.
From the aspects of health, the use of non-toxic materials, design of the product price is higher, especially the indoor LED lighting, don't keen on gaining petty advantages chooses is faulty LED lamp act the role ofing, currently only a small number of LED manufacturers is to use non-toxic materials production, to identify the method can directly use the nose, smelly products price more lower than without bad smell. Similar toxins such as lead, mercury, cadmium needs professional analysis. Look from the applicable environmental security, have reliable dustproof moistureproof design, materials, fire prevention, prevent ultraviolet ray, prevent cold cracking of LED products price is high.
LED light has the following characteristics
1, high purity, bright rich color. The current LED products almost cover the whole visible spectrum range, and high color purity. With the traditional way of colored light is incandescent lamp and filter, greatly reduces the light efficiency.
2, long life. LED the actual life of more than 50000 hours, is a regular source of several times or even more.
3, light source, no mercury, no ultraviolet light beam. LED is a solid light source, green environmental protection, especially suitable for the sweet water shop, jewelry store, museums, art galleries and other professional place, can meet the special requirements of the goods on display lighting.
4, solid luminescence, seismic performance is good, strong and reliable.
5, energy saving, economy, free maintenance.
6, the colour of dynamic control, light and shade is adjustable, trichromatic LED combination can be realized by using PWM color changes.
7 directionality, LED strong light, high utilization rate of luminous flux, and small volume, easy to LED the appearance design of lamps and lanterns and light intensity distribution of the control.
8, the LED can use dc low voltage power supply, safe and reliable.
9, LED from the start temperature limits, may be transient, generally for a couple of ms, and to be able to achieve a total luminous flux output transient.
What is the advantage of LED lamps and lanterns
(1) high energy saving
Energy saving energy no pollution or environmental protection. Dc drive, ultra-low power consumption (0.03 ~ 0.06 W single pipe) electric power conversion is close to 1 oo %, the same lighting effect than the traditional light source, energy saving more than 80%.
(2) long life
LED light source is also known as longevity light, means never extinguished the lights. LED light source for solid cold light source, with epoxy resin encapsulation, no loose parts in the body, there is no filament light easy to burn and thermal deposition, droop, such as faults, service life can reach 60000 ~ 100000 hours, long service life 10 times more than traditional light.
(3) more changes
LED light source can use red, green, blue three colors may, in under the control of computer technology make the three colors gray level 256 and arbitrary mixed, can produce 256 * 256 * 256 = 16777216 kinds of color, form the combination of the different light color variety, can realize the dynamic change of rich and colorful effect, and all kinds of images.
(4) the environmental protection
LED light source environmental protection effect is better. There is no ultraviolet ray and the red line spectrum, no heat, no radiation, glare small, and waste recycling, no pollution, no mercury elements; Cold light source, can safely touch, belongs to the typical green lighting source
(5) high pointed
Compared with the traditional monotonous lighting effects, the LED light source is low pressure microelectronics products, its success is a blend of computer technology, network communication technology, image processing technology, embedded control technology, etc., so also is digital information product, is a semiconductor photoelectric device "high point" technology, the online programming, unlimited upgrade, the characteristics of flexible.
(6) small volume
LED is basically a small chip is encapsulated in the epoxy resin, so it is very small, very light.
(7) high brightness, low quantity of heat
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