针对侧入式LED平板灯出光效率低、导光板(LGP)制造成本高、设计流程繁琐等缺点设计了一种无导光板的LED平板灯。利用复合抛物面反光杯(CPC)将LED阵列发出的光束汇聚并投射在出光面板上, 并通过掠射和叠加的方法实现了出光面板的照度均匀性。进一步采用Taguchi实验方法进行设计, 并借助Tracepro软件仿真分析, 将影响该灯具最大照度和照度均匀度的因子进行研究与分析, 同时运用ANOVA理论分析出因子对品质的影响程度, 进而优化灯具的各项结构参数, 设计出一款均匀度95.87%、最大照度39 870 lx无导光板LED平板灯。结果表明: 该平板灯的效果达到甚至超过目前市面上的LED平板灯, 并且其无导光板的设计可以在很大程度上降低LED平板灯的生产成本; 此外, 将Taguchi方法引入平板灯的设计简化了设计流程。

A LED flat panel light without light guide plate was designed to solve the disadvantages of low luminous efficiency and the high cost of Light Guide Plate(LGP) in edge-lighting LED flat panel light. The beam launched from the LED arrays was converged by the compound parabolic reflective cup(CPC) and was gazed on light emitting panel. In this way, the uniform luminous can be obtained on light emitting panel. Then, Taguchi method was used to design the experiment and analyzed the factors that affected maximum and uniformity of illumination by the software of Tracepro simultaneously. Furthermore, the influence of quality was studied by the theory of ANOVA to optimize structural parameters. Finally, the LED flat panel light without light guide plate after optimizing was designed with the illumination uniformity of 95.87% and the maximum illumination of 39 870 lx. These results show that the flat panel light that designed has achieved the general or even better effects of LED flat lights. It can also largely reduce the production cost of LED flat panel lights owing to the design of removing LGP. Besides, the applying of Taguchi method greatly simplified the design processes.