The structure of the surface light source mainly includes the following materials:
1. Aluminum frame
Appearance structure, and the main structure of LED heat dissipation - generally use AL6063, aluminum extrusion die, low initial cost investment, beautiful surface treatment, good heat dissipation effect, I went to the exhibition a few days ago and found that some manufacturers began to make die-casting frames, so IP level It can be made higher, and the sealing is better, and the overall appearance is beautiful, but the cost of the initial investment in the mold is higher
2. Diffuser plate
Disperses the light of the light guide plate evenly, and also plays the role of blocking the dots - the diffuser plate generally uses acrylic 2.0 plate or PC material, the cost of acrylic is lower and the light transmittance is slightly higher than that of PC. Acrylic is brittle and anti-aging The performance is weak, the price of the PC is slightly expensive, but the anti-aging performance is strong. After the diffuser is installed, the dots cannot be seen, and the light transmittance should be about 90%. The light transmittance of acrylic is 92%, and that of PC is 88%. You can choose the material of the diffuser plate according to your needs, and generally use acrylic material
3. Light guide plate
The side LED light is refracted by the dots to change the light angle and scatter - the light guide plate is the heart of the panel light. The dot design is very important. If the dot design is not good, the overall light effect you see will be very poor. Generally, 1. The middle is bright, The two sides are dark 2. There is a bright side on the incoming side, and the middle is dark 3. From different angles, the overall brightness is inconsistent 4. The local dark area is obvious. A large part of the light effect of the light guide plate is in the design of the network, followed by the selection of the plate, but it is not right to blindly pursue the brand of the plate, because many brand manufacturers like Japan's Mitsubishi, most of their good plates are used. People ordered good, many Mitsubishi sheets out of the market are mostly scraps, and their light transmittance is not as high as that of their own sheets, so the choice of sheet does not necessarily depend on the manufacturer of the sheet, as long as the test of light transmittance and high light efficiency is OK, In fact, you can
4. Reflective paper
Reflect the residual light on the back of the light guide plate - generally RW250
5. Back cover
Sealed lamp body - generally AL aluminum, the overall texture is strong, and can play a little role in heat dissipation
6.LED light source
Generally, 3528 is used, and some people use 5630 and 5050. The luminous efficiency of 5630 and 5050 is not high, and the design of the dots is difficult, and the versatility is poor, but the cost is low. 3528 has high luminous efficiency and strong versatility of dots. Generally, you can directly buy the light guide plate from other companies when you start doing it, and you don’t need to re-proof the design.
7. Drive power
Lamp drive - there are currently 2 power supply modes 1. Direct use of cross-current power supply (this mode has high efficiency, PF value as high as 0.95, high cost performance) 2. Constant voltage with cross-current mode (stable performance, but low efficiency, high cost) Generally used This mode is designed for customers who require certification, because the lamps are low-voltage lamps with 24V input, which do not need to be safety regulations, and can be shipped to various countries directly using a power supply with safety regulations.
Matters needing attention in the design and production process
1. The thermally conductive adhesive needs to be as thin as possible. It is better to use the thermally conductive adhesive with its own viscosity, otherwise it will affect the thermal conductivity.
2. The selection of diffuser panels. Now many flat-panel lamps on the market generally choose diffuser panels with a smooth surface and a matte surface. This diffuser panel has a disadvantage, large static electricity, and it is easy to absorb ash and produce bright spots during the production process. During long-term use, dust will enter the lamp body through various ways, which will cause the lamps to have dense bright spots. In the early days, some people used a double-sided diffusion diffuser plate. This diffuser plate has good light guiding effect and low static electricity, which can prevent dust from entering the lamp body. However, the light transmittance of this diffuser is only 85-88%. Whether you choose it depends on your own design.
3. For the selection of LED lamps, try to choose lamps with high efficiency, because the side-emitting flat panel lamps have limitations in heat dissipation and luminous flux output. If the power is large, the heat dissipation will be affected, and the light efficiency is low
4. Try not to glue the light-entering surface when sticking the reflective paper. The glue will absorb light, and it is easy to produce bright edges on the light-entering surface. However, the large-area light guide plate needs to be glued a little, otherwise there will be shadow stripes, because the reflective paper does not This is the case when it is glued tightly and loosened and warped in the lamp body.
Benwei Lighting is an LED Tube, LED flood light, LED Panel Light, LED High Bay, LED manufacturer with 12 years of experience. If you want to purchase a high-quality LED flood light or have a more in-depth understanding of the application of LED flood lights, please contact send us inquiry， our web: https://www.benweilight.com/.
