LED panel light structure sub-board design
The LED panel light derived from LED backlight has uniform light, no glare and exquisite structure. can help
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 that the IP level can be It is higher, and the sealing is better, and the overall appearance is beautiful, but the cost of investing in molds in the early stage is higher
2. Diffuser plate
The light of the light guide plate is evenly diffused, and the diffuser plate is generally used for the acrylic 2.0 sheet or PC material. The cost of acrylic is lower and the light transmittance is slightly higher than that of PC. Acrylic is brittle and has weak anti-aging properties. , The price of PC is slightly more 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 through the dots to change the angle of the light, and 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 seen is very poor. Generally, 1. The middle is bright, and the two sides are bright. Dark 2. There are bright edges on the incoming light side, and the middle is dark 3. From different angles, the overall brightness is inconsistent 4. Local dark areas are 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. Rear cover
The sealed lamp body is generally made of AL aluminum, which has a strong overall texture and can play a 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
There are currently 2 power supply modes for lamp driving: 1. Direct use of cross-current power supply (this mode has high efficiency, PF value as high as 0.95, and high cost performance) 2. Constant voltage with cross-current mode (stable performance, but low efficiency and high cost) Generally use this type of power supply The mode is designed for customers who require certification. Because the lamps are low-voltage lamps with 24V input, no safety regulations are required. Directly using a power supply with safety regulations can be shipped to various countries.
