ILLUMINATION DEVICE

摘要

PURPOSE:To enhance transmissivity, to eliminate the irregularity of brightness by using a light diffusing plate whose diffusing property is low and to improve the utilizing efficiency of light. CONSTITUTION:The front part of a bar-like cold cathode fluorescent lamp 1 is covered with the light diffusing plate 6 and a reflecting mirror 7 is arranged at the back part of the lamp 1. The mirror 7 consists of a first curved surface 7a and a second curved surface 7b positioned at the central part of the first curved surface. Besides, the lamp 1 is positioned at the focus coordinate of the first curved surface 7a.