论文部分内容阅读
基于交流(AC)110V发光二极管(LED)芯片制备了立体发光灯片,并对AC LED的光学均匀性和热学均匀性进行研究。通过改变荧光粉胶的配比来提高正反面的光学均匀性,研究发现,当立体灯片反面的荧光粉胶与正面的比例达到30%时,立体发光灯片反面的光通量与正面的比值最大,且正反面的色温差最小,其荧光粉的激发是最好的。另外,测试4种样品的发光角度,发现其发光角度分布相似,而发光强度与积分球测试得到的光通量比值也相近。同时对热学均匀性进行研究,发现正反面荧光粉胶配比达到30%时,该立体灯片的稳态温度最低,转化的热量最小,其相对应的光通量最高,使得立体灯片的热学均匀性更好。
A three-dimensional luminescent lamp was fabricated based on AC 110V LED chips. The optical uniformity and thermal uniformity of the AC LED were investigated. By changing the ratio of phosphor powder to improve the optical uniformity of the front and the back, it was found that when the ratio of the phosphor powder to the front of the stereoscopic light film reaches 30%, the ratio of the luminous flux to the front of the back of the stereoscopic light chip is the largest , And the front and back of the smallest color temperature difference, the excitation of the phosphor is the best. In addition, the luminous angles of the four samples were tested and found to have similar distribution of luminous angles, and the luminous flux was also similar to that of the integrating sphere test. At the same time, the research on thermal uniformity shows that when the proportion of phosphor in the front and the back is up to 30%, the steady-state temperature of the three-dimensional light sheet is the lowest, the heat of conversion is the smallest, and the corresponding luminous flux is the highest so that the thermal uniformity of the three- Sex better.