| 摘要 |
<p>A spread illuminating apparatus (10) includes a point light source (12), a light conductor plate (14) having a light inlet surface (14a) facing the point light source (12), and a housing frame to hold the point light source (12) and the light conductor plate (14), wherein the housing frame includes an inner frame member (16) and an outer frame member (18) to enclose the inner frame member (16), the point light source (12) is disposed at an end wall (18a) of the outer frame member (18), the light conductor plate (14) is held in the inner frame member (16) by joint mechanisms (40) such that the light inlet surface (14a) of the light conductor plate (14) is positioned inward of a forefront face (17) of the inner frame member (16) with a predetermined distance (di) therefrom, and wherein the inner frame member (16) is housed in the outer frame member (18) with a predetermined constant clearance (w) provided between the point light source (12) and the light inlet surface (14a) of the light conductor plate (14).</p> |
