申请号：AU2021105348A

申请日：2021.08.12

公开（公告）号：AU2021105348A4

公开（公告）日：20211014

IPC分类（公开）：F21V7/04;B43L1/04;F21W131/40;F21V5/00;F21Y101/00

CPC发明（公开）：F21V7/04;B43L1/04;F21W2131/40;F21Y2101/00;F21V5/007

申请（专利权）人：复旦大学，光华临港工程应用技术研发上海有限公司

发明人：林燕丹; 周莉

专利说明

The present disclosure belongs to the field of lighting technology, and specifically relates to a light-emitting diode (LED) blackboard light. The lens type LED blackboard light structurally comprises a light shell, LED light beads, a printed circuit board (PCB), an optical lens and a plastic surface cover, wherein the LED light beads, the PCB, the optical lens and the plastic surface cover form an optical module placed and fixed in a groove in the light shell; and the optical lens is in a long strip shape and is formed by incident surfaces, a light-exiting surface and two different side surface internal total reflection surfaces. According to the lens type LED blackboard light provided by the present disclosure, aiming at the position characteristics of a blackboard and the light, a secondary light distribution design is carried out on an LED through the optical lens, and the lens adopts a multi-free-form-surface lens form, fully collects energy emitted by an LED light source through refraction and total internal reflection ways, re-distributes and projects onto a blackboard surface, so that lighting effects on condensed light and polarized light are achieved, the utilization ratio of optical energy is greatly improved, and meanwhile, higher uniformity on the blackboard surface is maintained. The blackboard light is simple in structure and has higher practicability. DRAWING - Fig 1 17961985_1 (GHMatters) P116977.AU 10 &;>,20