With the development of the LED lighting industry, the LED panel light derived from the LED backlight has uniform light, no glare, and exquisite structure. It has been loved by many people. I have studied and developed the flat panel lamp for 2 years. The design and precautions of the panel light structure, I hope to help everyone.
The structure of the surface light source mainly includes the following materials:
Aluminum frame
Appearance structure, and main structure of LED heat dissipation--Generally use AL6063, aluminum extrusion die, low initial cost input, beautiful surface treatment, good heat dissipation effect. Some days ago, I also found that some manufacturers started to make die-casting frames, so IP rating Can be higher, and the light is better, the overall appearance is beautiful, but the cost of the initial investment in the mold is higher.
2. Diffusion plate
The light of the light guide plate is evenly dispersed, and the function of blocking the mesh point is also used. The diffusion plate generally uses acrylic or 2.0 material, the cost of acrylic is lower and the transmittance is slightly higher than that of PC, and the acrylic is resistant to aging. The performance is weak, the price of the PC is slightly expensive, but the anti-aging performance is strong. The diffuser plate cannot see the dots after being mounted, and the light transmittance is about 90%. Acrylic transmittance is 92%, PC is 88%. You can choose the diffuser material according to your needs, generally use acrylic materials.
3. Light guide plate
The side LED light is deflected by the dot refraction to change the angle of the light. The light guide plate is the heart of the flat light. The dot design is very important. The dot design is not good. The overall light effect seen is very poor. Generally, the middle light will appear. Both sides are dark 2. There are bright edges when entering the light, and the dark is in the middle 3. Standing at different angles, the overall brightness is inconsistent 4. The local dark areas are obvious. The light effect of the light guide plate is very large in the design of the outlet, followed by the selection of the plate, but it is not right to pursue the brand of the brand. Because many brand manufacturers like Mitsubishi of Japan, most of the good plates are People order well, many Mitsubishi plates out of the market are mostly scraps, and their light transmittance is not as high as that of their own plates, so the choice of plates does not have to look at the manufacturers of the plates, as long as the test transmittance is high, the light effect is OK. In fact, it can be
4. Reflective paper
Reflecting the residual light on the back of the light guide - generally RW250
5. Rear cover
Sealed lamp body - generally AL aluminum, the overall texture is strong, and can play a little heat dissipation
6.LED light source
Generally used 3528, some people use 5630 and 5050, 5630 and 5050 are not efficient and the design of the dot is difficult, the versatility is poor, but the cost is low. 3528 high-efficiency network has high versatility. Generally, you can directly buy other light guides and do not need to re-sample.
7. Drive power
Lamp driver--currently there are 2 power supply modes 1. Directly use cross-current power supply (this mode has high efficiency, PF value is up to 0.95, cost-effective) 2. Constant pressure with cross-flow mode (stable performance, but low efficiency, high cost) is generally used This mode is designed for customers who require certification, because the luminaire is a low-voltage luminaire with 24V input. It does not need to be used for safety. It can be shipped to various countries by directly using a safety power supply.
Problems to be aware of in the design and production process
1. The thinner the thermal conductive adhesive, the better. It is better to use the self-adhesive thermal adhesive, otherwise it will affect the thermal conductivity.
2. The selection of diffusing plate, many diffusing plates with smooth surface and matte surface are generally selected on the market. This diffusing plate has a disadvantage, the static electricity is large, and it is easy to suck in the production process to produce bright spots, and In the long-term use, dust will enter the lamp body through various ways, which will cause the lamps to be densely colored. In the early days, some people used a diffusing plate with double-sided diffusion. This diffusing plate has good light guiding effect and low static electricity, which can avoid the bright spot effect of dust entering the lamp body, but the diffusing plate has a low transmittance of only 85-88%. Whether you choose this depends on the meaning of your own design.
3. The selection of LED lights, try to use high-efficiency lamps, because the side-emitting panel lights have limitations in heat dissipation and luminous flux output, power dissipation will have an impact, and the light efficiency is low.
4. When entering the glossy surface, do not stick glue when sticking reflective paper. The glue will absorb light, and it is easy to appear on the light surface to produce bright edges. However, a large area of ​​the light guide plate needs to be glued a little, otherwise there will be a shadow strip because the reflective paper does not. This is the case when it is tight and loose and warped in the lamp body.
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