As with traditional light sources, the optical units of the LED light source are uniform. In order to make readers understand and easy to use, the following will be a brief introduction to the knowledge: First, the luminous flux Luminous flux refers to the amount of light emitted by the light source in the unit time, that is, the radiation energy can be felt by the human eye that part of the radiation energy. It is the product of the radiant energy of a band in a unit time and the relative visual acuity of the band. As the human eye on the different wavelengths of light relative visual rate is different, so different wavelengths of light radiation power is equal, the luminous flux is not equal. The luminous flux symbol is Φ, in lumens (Lm). According to the spectral radiation flux Φ (λ), we can get the luminous flux formula: Φ = Km ■ Φ (λ) gV (λ) dλ In the formula, V (λ) - relative to the spectral efficiency of light; Km-radiati...
Cold light source: cold light source is the use of chemical energy, energy, bio-energized light source (firefly, neon, LED, etc.). It has a very good optical, flashing characteristics. When the object emits light, its temperature is not higher than the ambient temperature, this light is called cold light source, such as LED is the use of electronic holes on the composite luminescence. From the strict sense, the LED light-emitting diodes is the electroluminescence also has heat, but relatively low point of incandescent light source. Hot light source: The use of thermal energy to stimulate the light source, such as incandescent lamp at 3,000-4,000K temperature when the heat radiation. Incandescent 80-90% of the energy conversion can heat, about 10% of the energy into light energy. So the luminous efficiency is low. We are not based on the temperature of the lamp shell is defined as cold light source, or hot light source. Lamps around the tempera...
Do you believe that the colors are actually alive: they have the flexibility to make the colors of various spaces affect our feelings. However, in most people's living space, pale or warm lights, we are generally used to. The new LED color lights, that is, with dimming, coloring mechanism of LED lamps, can produce the effect of changing the space atmosphere. LED color change lamp by the capacitor step-down power supply, LED controller and G, R, B three-color LED array. Its shape and the general milky white incandescent bulbs the same, but after the light will automatically press a certain time interval discoloration. Circle to send green, yellow, green, purple, blue, red, white light. (Such as red, blue and two blue LED light when the purple light); if red, green and blue three kinds of LED When lit, it will produce white light. If there is a circuit can make red, green, blue LED, respectively, two bright, separate light ...
The first step: product packaging detailed look Regular LED bulb products, the product packaging will have parameters, manufacturers, origin, contact and other identification. Through the product packaging, consumers can first understand the brightness, light color, energy efficiency and service life and other most concerned about the purchase factors, so the right choice for their own products. If the product packaging does not have these signs, compared to non-formal products, its product quality is difficult to be guaranteed, consumers in the process of using the bulb damage is also difficult to find businesses for after-sales service. So consumers in the purchase of LED bulbs before you read the product packaging. Step 2: Pick up the bulb and watch carefully After reading the LED bulb product packaging, the next should come up with a light bulb to see, touch, shake, measured a test. First look at the appearance of the light bulb, the appearance sh...
LED lights of the ten major advantages: First, the lamp body is very small LED lights are very small, very fine LED chip package in the transparent epoxy inside, so it is very small, very light, in the production and application can save a lot of material and space. Second, the energy consumption is very low LED lamp operating voltage is generally only 2 ~ 3.6V, operating current as long as 0.02 ~ 0.03A. That is: it consumes no more than 0.1W of electricity, the consumption of electricity than the same luminous incandescent lamp to reduce more than 90% Lamps are reduced by more than 70%. LED Third, sturdy and durable LED chips are completely encapsulated in the epoxy resin inside. Small epoxy resin particles extremely difficult to break, the entire lamp body is not loose part; inside the chip is extremely difficult to break, but also little heat effect and may volatilize, fuse. These features make LED difficult to dam...
In the LED production of the problem is the chip package, the cup of bubbles occupy a large proportion of bad, if the production bubble is not well resolved or control, it will cause the product to accelerate the decay of a factor, which will show the IV Decrease, IR becomes larger, VF rises. Affect the bubble generation factors are more. In the general case, the process is mature, the bad proportion of the bubble will not be too high. If the cup has bubbles, you can give the cup a certain percentage of glue, and then in the next process. The following are the relevant factors: 1. The temperature and humidity of the environment have a greater impact on the bubble. 2. The temperature of the mold is also a factor in the generation of bubbles. 3. Bubble generation and process adjustment has a great relationship. For example, some factories do not have the same vacuum without bubbles, and there is a bubble in this factory even if there is a vacuum, ...
1 high reliability LED products are mainly LED chips and power, cooling shell, control circuit and other components. LED power supply which directly affects the product is good or bad. In particular, LED street lamp products, due to installed at high altitude, maintenance is not convenient, maintenance costs are also large. 2 high efficiency LED is energy-saving products, drive power also meet the energy requirements. Especially the power installed in the structure of the lamp, is particularly important. Because the LED luminous efficiency with the LED temperature increases and decreased. Power efficiency is high, its power consumption is small, in the lamp heat is small, it will reduce the lamp temperature. Can delay the LED light failure favorable. 4inch Die-casting Aluminum led downlight 3 constant current drive mode In order to meet the LED VI characteristics, so the LED power supply must use constant curren...
Led sterilization lamp is actually a kind of LED lights, is to produce negative ions after the miniaturization of complex equipment and energy efficient combination of energy, in the light irradiation at the same time, can produce a large number of negative ions scattered in the space, which play smoke Dust, odor and other harmful effects, widely used in hotels, hotels, offices, conference rooms, family and tea, karaoke, Internet cafes and other leisure and entertainment places, is to improve air quality, eliminate formaldehyde, benzene and other harmful gases Of the excellent product. Health is basically air, and negative ions are vitamins in the air. Nature, the forest, the waterfall side, thunderstorms after the air fresh and pleasant, because these ambient air anion content increased. Experts pointed out: the concentration of negative ions in the air and human health has a direct relationship, according to statistics, adults breathe about 20,000 ti...
L/B is the standard definition of LED lamp life. 50000h (L85 / B10), that is, 10% of the product luminous flux output to the initial value of 85% or less when the time is 50,000 hours. In turn, it means that LED products with 50,000 hours after the work, there are still 90% of the product light failure less than 15% reliability. 50000h (L80 / B50), that is, 50% of the product luminous flux output to the initial value of 80% or less when the time is 50,000 hours. Refers to the LED lamps work 50,000 hours later, there are still 50% of the product light fades less than 20%. In general, to achieve this indicator of LED lamps, you must use world-class LED chip, the use of higher thermal design, 25 ° C ambient conditions, LED lamp chip junction temperature control within 60 ° C can be done.
Compared with the previous incandescent and energy-saving lamps, LED lamps can be described as a lot of advantages, its use of longer life, but also more energy saving. In addition to see the parameters of the lamp (wattage, life, color temperature), but also should pay attention to meet the following three functional requirements: 1, the function of lighting. Color temperature is different, the impact of light effects are also different. In general, the color temperature is greater than 5000k for the cold light, color temperature between 3000-5000K for the warm white, color temperature is less than 3000K is warm. Home lighting is generally used for warm light, because the warm reminiscent of fireplaces and fire, it is warm and peaceful. 2, eye function. Stroboscopic damage to the eyes of a huge, especially in the light of a long time to study and study people, need attention. In addition, the LED, i.e., the light emitting diode, is made...