The problem of dark area about Panel and Plate light

         When we talk about ultra-thin panel lights and flat panel lights, the main problem is that the dark areas and low light efficiency.Why some of that the light is very uniform and bright, but other is only dark and also out of light?Let's solve this problem.

       The difference is obvious. What is the main reason of the difference?then we need to take a look about structure of the panel lamp.

         We see that both the panel light and the large flat panel have the same structure, and the light comes out from the SMD led and passes through the diffuser plate.And the one that affects the light distribution most is the guide plate.Let's take a look at the real picture of the guide plate.

         The most important function of the guide plate is to make the light from the surrounding area be uniform, and the effect is the small dots on the graph.If you open a panel light or flat light, and carefully observe a dot, we'll find dot is not evenly distributed in the back of the guide plate,  present around is poor, but to the middle of the distribution is more closer.why should do that?Of course this is an optical simulation and closely calculated (each material is different and the results are different).After calculating the dot size and distribution, the factory is able to obtain the guide plate we see through the silk screen.We know that optics itself is very strict, and even a slight error in the above steps leads to uneven distribution of light.

          The third reason is that the material of the guide plate has changed. The material of the guide plate is changed from the early PC and PMMA to the present PS and glass.This is a very big change.We know that the conductivity of light in each material is different, which leads to a great change in light efficiency and light, which is the worst in glass.

       The final reason is the factory's assembly ability, which has a great impact on panel lights and large plates, especially large ones.Everyone knows that it's hard to get an optical assembly, even though the structure of the LED lights is very simple now, but there's a big difference.For example,The flat lamp use soft light strip, there will be always some misplacement when the soft light strip which stuck on the flat lamp, if the dislocation is bigger, the side of the whole lamp will appear obvious dark area.In addition, the gap between the guide plate and the light strip will  also affect the whole effect.

      So if you need to buy panel lights and flat panel lights, it's really important to choose suppliers.