| 摘要 |
To provide an illumination device which can be easily and sturdily assembled despite having a round or elliptical shape and which has high light utilization efficiency. An illumination device 1 of the present invention includes: a point light source 6; a substrate 7; a hollow frame 2; and a bottom surface reflection section 5, a side surface reflection section 4, and a light conducting reflection plate 3 that are disposed inside the frame 2. The surface of the bottom surface reflection section 5 that faces the light conducting reflection plate 3, the inner surface of the side surface reflection section 4, and the surface of the light conducting reflection plate 3 that faces the bottom surface reflection section 5 are formed from members that have high light reflectivity and low light transmissivity. The frame 2 has an opening of the same shape as the light conducting reflection plate 3 on both sides, an engaging bent section 2c is provided at one edge of the opening, and the side surface reflection section 4 is disposed on the inside surface side thereof. The light conducting reflection plate 3 is held between the engaging bent section 2c of the frame 2 and the side surface reflection section 4. The side surface reflection section 4 is held by the other edge of the frame 2 and the bottom surface reflection section 5 fixed to the substrate 7. |
