The LED panel light embodies the lighting application realm of "seeing the light but not the light". It has the advantages of uniform lighting, soft and quiet, clean and bright, and has the advantages of anti-mosquito, anti-smoke, anti-fog and easy to clean; its simple shape is easy to integrate with the ceiling module, so it is especially complicated in the integrated ceiling, and the environment is more complicated. The small bathroom and kitchen sector has great application advantages. At the same time, LED panel lights also have many characteristics such as low power consumption, energy saving and environmental protection, long life, economical use; technology fashion, convenient application, etc., which are deeply loved by modern consumers.
However, with the rapid development of the integrated ceiling industry and the popularization of LED applications, because there is no standard to follow for LED panel lights and the lack of government technical supervision, a large number of crude workshops have emerged. In the market, there are a large number of LED panel lights with short lifespan, poor light color and luminous efficiency, and even leakage accidents. There are constant complaints from users and dealers have no after-sales service. This greatly impacts the market’s determination and belief in LED panel lights and affects the industry. Healthy development. Here, let us dissect the LED panel light market from a technical point of view, especially the LED panel light market phenomenon in the integrated ceiling sector.
LED light source devices currently used in LED panel lights
Due to its small size, suitable power, high luminous efficiency, easy light control and heat dissipation, the current LED panel lights from the earliest 3528 to the later 3014, 2835, to the current main use of SMD4014 lamp beads.
The status quo of core component drive power
Because LED lamp beads belong to low-voltage startup semiconductor devices, the most basic requirement is that they need to be driven by a matched low-voltage power supply and require a continuous constant current. If the current is too high, the light decays quickly, and the lamp will be extremely dim or even burn out after a long time .
At present, there are mainly three technical solutions for LED drive power:
1. Resistance-capacitance step-down: simple solution, few components, low cost, non-constant current. It is mainly used for LED lamp configurations of 3W and below, and there is a risk of leakage through the lamp board, so the structural shell of the lamp body must be insulated;
2. Non-isolated power supply: moderate cost, using IC constant current, but there is also the risk of leakage caused by breakdown, and the structural shell of the lamp body must be insulated.
3. Isolation power supply: high cost, IC constant current, good safety.
In order to achieve better light extraction efficiency, LED panel lights generally have a slender string structure. As such, in order to ensure the heat dissipation of LED lights, an all-aluminum structure is now used as a cavity for heat dissipation. The non-insulating nature of the aluminum lamp body requires the use of an isolated power supply to have basic safety protection, and at the same time, it can provide a continuous constant current to ensure the long life of the lamp beads.
