| 摘要 |
PURPOSE: A cover for a light emitting diode lamp is provided to improve the effectiveness of illumination by lighting a wide area with a minimum light emitting diode. CONSTITUTION: A cover(10) is made of acryl or polycarbonate. An insertion hole(11) is formed near a light emitting diode(21) of a circuit board(20). A crystal lens(12) is inserted into the insertion hole. A diffusion groove is formed in the inside of the crystal lens. The diffusion groove is formed into one of a square groove, a hexagonal groove or an octagonal groove. |
