4.Reflective paper The role of the reflective paper is […]
The role of the reflective paper is to fully reflect the light overflowing under the light guide plate, so that the light emitted by the LED is fully utilized. Use reflective paper with a reflectivity close to 100% as much as possible to maximize its light utilization and improve the output brightness of the LED flat lamp. Generally For RW250.
5, rear cover
The main function is to seal the LED flat lamp, generally using aluminum plate, and also can play a role in heat dissipation.
There are currently two types of LED drive power supplies. One is the use of a constant current power supply. This mode has high efficiency, a PF value of 0.95, and a high cost performance ratio. The second is the use of a constant voltage and constant current power supply with stable performance, but low efficiency and high cost. This power supply is mainly for export, and the other party has certification requirements. In fact, it is safe to use a constant current power supply in the home, because users are difficult to access the power supply, and the lamp body itself uses a safe low voltage.