| 摘要 |
<P>PROBLEM TO BE SOLVED: To block parts which appear dark on the optical sheet depending on the angle from which the light source apparatus is seen. <P>SOLUTION: The light source apparatus includes a light guide plate, a plurality of optical sheets, and a frame, wherein one of the plurality of optical sheets which is arranged at a position most distant from the light guide plate is a prism sheet, the prism sheet having: a plurality of prisms formed on one surface thereof which are extended in parallel with each other; and one or more projecting pieces which are integrally formed with the prism sheet in a shape projecting from a fringe of the prism sheet. Angles formed by a plurality of pairs of sides respectively adjoining the projecting pieces are smaller than 90 degrees. Each of the two angles formed by the straight line and the pair of the sides is set to be smaller than 45 degrees, wherein the straight line: passing through a region formed between the pair of dark part suppressing sides; passing through an intersection point of the pair of dark part suppressing sides; and being parallel or perpendicular to ridge lines of the prisms. <P>COPYRIGHT: (C)2011,JPO&INPIT |
