| 摘要 |
PROBLEM TO BE SOLVED: To secure a maximum area of a light outgoing surface while preventing a bright line. SOLUTION: The flat light source device 10 comprises a linear light source 12, and the light emitted from the linear light source 12 gets into one side surface of a light guide plate 16, and goes out from the upper surface 16a of the light guide plate 16. A display panel 22, having two display areas of which, light transmission rats are different from each other, is arranged so as to cover the upper surface of the light guide plate 16. A shading sheet 28 shading the light going out from the light guide plate 16, is arranged between the light guide plate 16 and the display plane 22. The light shielding property becomes low in proportion with distance from one end surface 16c of the light guide plate 16, and the unevenness of the light going out from the light guide plate 16 is absorbed in the light shielding plate 28. By the above, the brightness of the light going out from the display panel 22 is prevented from becoming suddenly high at the neighboring area of the linear light source 12, therefore, even the neighboring area of the linear light source 12 can be utilized as the light outgoing surface. |
