| 摘要 |
A light guide plate has an annular part and an inside annular part, and the annular part has an element array facing part having an incident surface and an inside reflection part having a reflective surface which is a part located further on the inside annular part side than the element array facing part and reflects light incident from the incident surface toward the inside annular part. The reflective surface has an annular first light scattering area to which light scattering processing is applied, and a second light scattering area which is an area located further on the inside annular part side than the first light scattering area and to which light scattering processing is applied in a manner different from the first light scattering area so that a larger quantity of light than the first light scattering area is emitted. |
