| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the uncomfortable feeling of a display image caused by the luminance unevenness changing in the time of lighting by one light emitting diode, and lighting by other light emitting diodes, when plural kinds of the light emitting diodes compose a primary light source by applying a surface light source device and a display device to a liquid crystal display device of a portable telephone, e.g. SOLUTION: A plurality of dot light source 18As and 18B are closely disposed so that optical paths in which the illuminating light propagate the inside of a light transmission plate 16 may overlap when viewing from a light-emitting surface 16B side of the light transmission plate 16.</p> |
