High-power LED lamp beads parameters and design skills

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LED lamp beads parameters introduced:

1, brightness

LED brightness is different, different prices.


Spotlight: Usually brightness 60-70lm;


Bulb: Usually brightness 80-90lm.

NOTE: 1W brightness 60-110lm3W brightness up 240lm5W-300W is an integrated chip with a serial / parallel package, mainly to see how much current, voltage, and a few strings of.


1W red light, the brightness is generally 30-40lm; 1W green light, the brightness is generally 60-80lm; 1W yellow light, the brightness is generally 30-50lm; 1W blue light, the brightness is generally 20-30lm.

LED lens: a lens ships with PMMA, PC, optical glass, silica gel (soft silicone, hard silicone) and other materials. The greater the angle, the higher the optical efficiency, small-angle lens LED light to shoot too far.


2, antistatic ability

Antistatic ability of LED, long life, and therefore higher prices. The LED is usually static than 700V can be used for LED lighting.

3, wavelength

The same wavelength LED, and color, such as requiring the same color, the price is high. No LED spectral separation device manufacturers is difficult to produce pure colors.

Warm white points (color temperature 2700-4000K), white (color temperature 5500-6000K), cool white (color temperature above 7000K) warm white Europeans prefer

Red: Band 600-680, 620, 630 which is mainly used for stage lights, infrared proximity 690

Blue: 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 one-way conductive light, if there is reverse current is called leakage, leakage current is large LED, short life, low prices.

5, light angle

Different uses LED light emission angle is not the same. Special light-emitting angle, higher prices.

6, life

Different quality is the key to life, life is determined by the light fades. Light is small, long life, long life, high price.

7, LED chips

LED luminous body for the chip, different chips, prices vary widely. Japan, the United States more expensive chip, the Taiwan plant with China's domestic manufacturers LED

Chip cell lower than Japan, the United States.

8, the chip size

The size of the chip to the side length of said chip size is generally:

38-45mΩ, quality big chip LED is better than small chips. Proportional to the price of the same chip size.

9, colloid

Ordinary LED colloidal generally epoxy resin, plus a UV LED and fire agents more expensive, high-quality outdoor LED lighting should be UV and fire.

10, color value

White: 60-65, Warm White: 50-60, since companies use different phosphor package is not the same, so the color is not the same value.

Point light Design Tips

Each product will have different designs, different designs for different uses, LED lighting design reliability comprising: electrical safety, fire safety, for the environment safety, mechanical safety, health and safety, safe use of time and other factors. From the electrical safety point of view, it should comply with the relevant international and national standards. Because LED is a new product, the Chinese national standards lag, but the state provides product qualification testing. With international safety certification (such as GS, CE, UL, etc.) and LED lighting price national product quality certification must be high, because these products in the security design is reliable. Consumer attention is to be carefully identified the authenticity of the certificate, there are national and international safety certification product certification are not many manufacturers.

From a health aspect, the use of non-toxic materials designed product prices higher, especially indoor LED lighting, do not cheap selection of LED lighting odor, currently only a few LED manufacturers is produced using non-toxic materials, identify methods can directly with the nose, respectively, the smell of the product lower than many odor-free prices. Professionals need a similar analysis of lead, mercury, cadmium and other toxins.

From the application of environmental security perspective, a reliable dust-proof design, material fire, UV, anti-low temperature cracking price of LED products is high. The main technical parameters of LED luminous intensity, color, wavelength, color temperature and so on. Here we give a brief introduction on these parameters.

LuminousIntensity; IV

Light intensity is defined as a unit solid angle emitted luminous flux, in units of candles (Candela, cd). In general, the light source will be in different directions with different intensity emitted luminous flux in the visible radiant intensity in a particular direction unit solid angle of the emitted light intensity that is called.

Chromaticity

The human eye's perception of color is a complex process, the visual sense in order to quantify the color description, International Lighting Association (CIE) according to standard observer's visual experiments, the human eye to different wavelengths of radiation caused to be record, calculate the red, green, and blue color matching function, through mathematical transformations obtained after the so-called CIE1931ColorMatchingFunction (x ((), y ((), z (()), and a color matching function based on this, the subsequent development of the several color metric definition, made it possible to describe the use of color. CIE1931 color matching function according to the human eye to visible light stimulus value XYZ represented by the following formula obtained by converting the x, y, namely CIE1931 (x, y) color coordinates degree, through this unified standard color description will be quantified and controlled.

ChromaticityCoordinates

However, since the color domain (x, y) chromaticity coordinates constructed of non-uniformity, color difference is difficult to quantify, he said so in 1976 CIE CIE1931 chromaticity coordinates will be converted to the color gamut formed close to the uniform color space, color difference can be quantified let that 

UniformChromaticityScale

Chromaticity coordinates to (u ', v') represents, calculated as follows: dominant wavelength (λD) is also one of its method of color expression in the test piece obtained chromaticity coordinates (x, y) after , which was marked on the CIE chromaticity coordinates diagram (see below), link E light source color point (chromaticity coordinates (x, y) = (0.333,0.333)) and extending to the point of the link line, this extension cord and the spectrum locus (horseshoe) intersect wavelength values, that is called the main wavelength of the test piece.

But should be noted that such a method of marking the same main wavelength will represent multiple different shades points, is the more significance when used in DUT chromaticity point adjacent spectral locus, while the white LED can not be this way describing its color characteristics.


Purity

In its main wavelength description auxiliary color when it said that as a percentage, is defined as the chromaticity coordinates E DUT chromaticity coordinates of the light source and the linear distance of the DUT to E light wavelength spectrum of the main track