Due to the LED panel light has not issued national standard at present, in 2014 China electronics standardization technology association and China gather industry jointly promote foundation announced on both sides of the common standard GT004-2012 "general indoor lighting lamps and lanterns of LED panel", the LED panel light made regulations on the safety and performance, specification of LED panel light quality requirements, as a reference basis for the flat lamp manufacturer production, also can make the market management laws.Reference on both sides of the common standards, in the face of how to control the quality of LED panel light are discussed.
1, the structure characteristics
Compared with other lamps and lanterns of LED panel light structure unique, mainly by the light source, light guide, diffuser, reflection paper, driving power and so on, more than any other lamps and lanterns, diffuser, reflection of light guide plate paper, such as the LED back light structure of the products.
(1) the LED light source
LED panel lamp manufacturers in the use of LED light source are basically adopts SMD patch series, such as 3528, 3014, etc.LED panel lamp manufacturers facing market is dynamic, the manufacturer will choose according to the actual needs of customers for products meet the design requirements of the light source.The choice to product performance improvement of LED light source is very critical, is one of the important factors that improve the quality of the LED panel light.
(2) guide plate
Is the role of guide plate LED point light source the light through the optical technology into a surface light source, the side of the LED light refraction make the light from the front even exported by branch.At present mainly adopts printing forms of light guide plate, guide plate quality will directly affect the product's brightness and uniformity, require good pervious to light performance.
Guide plate is the key point of LED panel light quality control, site design is bad, the overall smooth effect is bad, the light is not even, also can appear on both sides of the middle light there's a light at the end of the dark and into the light brightness, visible partial dark space, different angles are inconsistent, and so on and so forth.To improve the photosynthetic efficiency of light guide plate depend mainly on the design of the network, the second is the quality of the plate, should choose the qualified panel with high light transmittance.
(3) diffusion plate
Diffuser's main role is to uniform light guide plate export, let light distribution more uniform.When the light beam to spread, the reflected light will spread to different perspectives, and then by the positive injection of light guide plate, use a variety of density, size of diffusion, make uniform glow of light guide plate, improve the brightness of the light guide plate.Can also play a role fuzzy network.
Diffuser generally use the acrylic sheet of 2.0 or PC material, almost is PS material.Yakeli the lower cost and light transmittance of a little higher than PC, anti-aging performance weak;The PC price a little expensive, but strong anti-aging performance.Diffuser in mount later can't see the site, and light transmittance to around 90%.Acrylic light transmittance at 92%, a PC is about 90%, the PS is about 88%, manufacturers can according to the requirements in terms of diffusion plate material choice, most manufacturers are using acrylic material at present.
(4) reflective paper
Is the role of reflective paper guide plate under the overflow of total reflection of light, LED light, make full use of as far as possible choose reflectance close to 100% reflective paper, to maximize the light use, improve the output of the LED panel lamp brightness, for RW250 commonly.
(5) HouGaiBan
Main function is to seal the LED panel lights, generally USES the aluminum plate, and can also heat dissipation effect.
(6) drive power supply
There are two kinds of LED drive power supply, one is to use a constant current power supply, the model of high efficiency, PF value as high as 0.95, cost-effective;The second is the use of constant pressure constant current power supply, stable performance, but low efficiency, high cost, the use of the general power supply is mainly for export, the other certification requirements.Actually family using constant current power supply is safe, because users are hard to come into contact with the power supply, and use safe low voltage lamp body itself.
