| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thin inside-illumination type planar lighting device capable of controlling irradiation light from a light source with power consumption reduced. <P>SOLUTION: The device is provided with a body case 11 equipped with a picture-frame frame part 12 arranged around an opening 11a, a light diffusion plate 13 buried in the opening, a linear light source 14 arranged at the frame part, a side-face reflecting plate 16 between an inner face of the frame part and the linear light source, and a rear-face reflecting plate 17 arranged at an inner face of the body case. The side-face reflecting plate consists of a convex-face reflecting part 16a with a center projecting in a linear light source direction and formed in a convex shape in an axis direction of the linear light source, a rear-face side concave-face reflecting part 16b installed in extension from one of the end edges of the convex-face reflecting part and linked to a rear-face reflecting plate base part 16b1, and a front-side concave-face reflecting part 16c extended from the other end edge of the convex-face reflecting part and linked to a frame-part inner-face front-side base part, and the rear-face reflecting plate is so structured as to be extended in inclination in a light diffusion direction from the edge end toward the center, form a linear rear-face reflecting plate center part 18 in a direction of the axis center 14a of the linear light source, and guide the irradiation light from the linear light source to the light diffusion plate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
