| 摘要 |
PURPOSE: A glare reduction lighting device is provided to have angle of beam spread which is suitable as a main illumination by using two prism plates which are orthogonally arranged and optimizing a prism pattern shape. CONSTITUTION: An optical source unit comprises a plurality of LED packages(120). The plurality of LED packages is installed on a wiring board(110). An optical member(150) changes the distribution of light emitted from the optical source unit. The optical member comprises a first prism plate(151) and a second prism plate(153). A first prism pattern is formed on the first prism plate. The second prism plate is formed on the first prism plate. A cover member(130) comprises a reflecting surface(130a) reflecting light emitted from the plurality of LED packages toward the optical member. |
