| 摘要 |
PURPOSE: A double layer lighting board which magnifies the scattering effect of light and improves insulation effect and soundproof effect is provided to improve the intensity of a lighting board by forming the board in a regular grid structure. CONSTITUTION: A double layer lighting board comprises a plurality of couplings(20), a rib(21) and a grid layer. A plurality of couplings is formed on the upper side of the lighting board with a fixed interval at a regular interval. The rib is formed inside a plurality of couplings in a vertical direction. The grid layer is formed between the upper side and lower surface of the lighting board. The grid layer is composed of a lattice cell. |
