| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface emitting device which has an excellent uniformity and can emit light at high luminous intensity. SOLUTION: The surface emitting device includes a light plate having upper and lower surfaces opposite to each other; a reflector formed on the lower surface of the light plate; a LED light source having LED elements, which is disposed in such a manner that light from the LED elements is irradiated on an end surface of the light plate. The surface emitting device emits light form the upper surface of the light plate. The light plate has a plurality of notches each having two sidewalls, at its end surface opposite to a light-emitting surface of the LED light source. As these notches are far apart from their center portion, an angle formed between an outer sidewall of the notches and the end surface of the light plate is closed to a right angle, whereas an angle formed between an inner sidewall of the notches and the end surface of the light plate becomes smaller. |
