From the LED light source to the light guide plate, the […]
From the LED light source to the light guide plate, the reflector, until the final display output of the LED flat lamp, the light utilization rate will be reduced by about 30% from the brightness index, and the final utilization rate of the LED flat lamp from the light guide plate to the final utilization rate is less than 70% . In order to improve the light utilization rate, we need to choose good quality materials, such as light guide plates and reflective paper, which not only meet the technical performance indicators of LED flat lamp design, but also cooperate with each other in specifications and specifications. size. Due to the thicker downward module, it does not meet the trend of light and beauty. At present, most of them are side lights.
The function of the guide plate is to guide the light scattering direction, which is used to improve the brightness of the panel and ensure the uniformity of the brightness of the panel. Now the light guide plate is thinner and thinner, and its quality has a great influence on the quality of the LED flat lamp. The key to improving the efficiency of side-light LED flat panel lights is the light transmittance and optical uniformity of the light guide plate.
Light guide plate is made by injection molding acrylic to smooth surface, or using the existing acrylic plate, the transmittance reaches more than 90%. Then, for highly reflective and non-absorbent materials, the diffused dots are printed on the bottom of the light guide plate by screen printing, and the reflective paper will overflow the total reflection of the light on the bottom surface. In the light guide plate, it is used to improve the use efficiency of light and the front brightness. Through laboratory tests, the results show that the efficiency of LED panel lights produced by professional LED manufacturers can reach 110lm / W at 5500K, but few manufacturers achieve first-level efficiency.
