| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a backlight capable of suppressing frontal luminance unevenness and oblique luminance unevenness, and also capable of suppressing visibility of a stud pin. <P>SOLUTION: The backlight includes a linear light source to emit light, and a laminate having an entrance plane for light emitted from the linear light source to enter, and a light emitting plane to emit light incident from the entrance plane. The laminate include a molded diffuser and a prism sheet disposed adjacently to each other. The molded diffuser and the prism sheet are laminated toward the light emitting plate from the entrance plane in this order. The molded diffuser has an entrance plane for light emitted from the linear light source to enter, and a light emitting plane to emit light incident from the entrance plane toward the prism, and a plurality of triangle pole-shaped protrusions the top parts of which curvature R is given are repeatedly disposed on the light emitting plane. The basic angle of the protrusion is ≥38 degrees and ≤42 degrees, and the ratio of the curvature R given to the top part of the protrusion to the pitch Cp of the protrusion R/Cp satisfies a relationship of 0.0014<R<Cp<0.43. <P>COPYRIGHT: (C)2011,JPO&INPIT |
