| 摘要 |
A reflective unit (16, 26, 26a) for using with a light guiding element (14, 24, 24a) is disclosed. The light guiding element (14, 24, 24a) includes a light entrance portion (144, 244) and a light exit portion (148, 248, 248a). The light exit portion (148, 248, 248a) has a first concave portion (1482, 2482, 2482a) dented toward the light entrance portion (144, 244). The reflective unit (16, 26, 26a) includes a fixing member (162, 262, 262a) and a reflective member (164, 264). The fixing member (162, 262, 262a) is arranged around the perimeter of the upper end of the light exit portion (148, 248, 248a). The reflective member (164, 264) is arranged on the fixing member (162, 264, 262a) for covering the first concave portion (1482, 2482, 2482a) and forming a conical-shaped light propagating space (19, 29). |
