| 摘要 |
A light guide includes a main body, an input surface (554), an output surface (551a), a reflecting surface (551b), a first diffusing portion (A1) and a second diffusing portion (A2). The main body is guiding light. The light is inputted the input surface of the main body. The light is emitted from the output surface (551a) in a direction intersecting with the longitudinal direction. The reflecting surface (551b) is provided on the main body and opposite to the output surface (551a). The first diffusing portion (A1) is formed on the reflecting surface 551b) closer to the input surface. The second diffusing portion (2) is formed on the reflecting surface 551b) closer to a side opposite to the input surface (554). The first and the second diffusing portions have a first and a second length respectively in a direction orthogonal to the longitudinal direction, and the first length is longer than the second length. |
