Hybrid lens combined blackboard lamp

Abstract

The invention relates to a hybrid lens combined blackboard lamp. Two or more lenses with different light-emitting angles are combined, light of a corresponding LED lamp strip is evenly irradiated to ablackboard in a layered manner, ultra-close distance lighting of the blackboard lamp can be achieved, and the high-homogeneity lighting effect of the blackboard can be achieved. Meanwhile, the irradiation distance is short, emergent light of the LED blackboard lamp cannot be directly shot into the human eyes, and dazzling to teachers and students can be effectively reduced. A supporting frame canbe lifted and can be telescopic, and can adapt to actual different needs, the supporting frame and the lamp body can be rotatably connected, and the whole lighting angle of the whole lamp can be adjusted. According to the hybrid lens combined blackboard lamp, the center of each lens is in one-to-one correspondence to an LED, the emergent direction is controlled to be a rotating-symmetry small-angle light distribution curve, more light can fall on the blackboard, and compared with a strip lens in the prior art, the whole lamp is higher in light efficiency, independent lens combination is morefree and flexible, and the energy utilization rate is higher.

Description

technical field [0001] The invention relates to the field of educational lighting, and more specifically relates to a hybrid lens combination blackboard lamp. Background technique [0002] Traditional classroom blackboard lighting uses traditional T8 lamps. The light of T8 tubes is directly and indirectly reflected to the blackboard surface through a large-area reflector. In order to cover the entire blackboard with light, it is necessary to set the lamps at a relatively remote distance , Only by illuminating the blackboard from a long distance can the entire blackboard be illuminated. [0003] However, long-distance lighting is likely to cause light to directly enter the teacher's eyes, which will cause serious glare to the teacher. [0004] With the rapid development of LED lighting, LED blackboard lights are also produced, but the common LED blackboard lights use the optical method of strip lens or single lens multi-head combination, but these optical solutions always ne...

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the above-mentioned invention still has the disadvantage of requiring long-distance lighting and causing more serious glare.

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