| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface light source device which secures a wide light emission area while using a compact structure. SOLUTION: Light conducting blocks BL1-BL3 are arranged in tandem. The light conducting block BL1 is supplied with primary light from a primary light source L1. The other primary light sources L2, L3 are placed in recesses formed near the ends of the light conducting blocks BL1, BL2 and supply primary light to the light conducting blocks BL2, BL3. In order to prevent luminance insufficiency caused by electrode parts at both ends of each primary light source L2, L3, the superimposed parts of the adjacent light conducting blocks are formed by tong-shaped superimposed parts 17a, 17b, 27a, 27b and strip superimposed parts 17c, 27c. The light conducting blocks BL1-BL3 may be constructed of integrated light conducting plates. The primary light sources L1-L3 each having curved electrode parts at both ends may be employed. |
