| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve improvement of light extraction efficiency and reduction in color drift in a well-balanced manner and restrict unevenness in brightness, thereby helping to improve light extraction efficiency for an EL element. <P>SOLUTION: An EL element 1 is provided which includes a first substrate 21 consisting of a translucent substrate and a luminous layer 26 formed on a reverse side 21b of the first substrate 21 and sandwiched between an anode 24 and a cathode 25. On a surface 21a of the first substrate 21 is laminated an optical sheet 3 equipped with a lens group on the surface of a translucent base material 31 via a lamination layer 32. The optical sheet 3 has unit lenses 4 (4A, 4B) of the lens group partially and two-dimensionally arranged, and includes color drift reduction parts 5 between the unit lenses 4, which, occupying 0.1%-50% of the surface area, increase a total reflection angle relative to the emitted light from the translucent base material 31. <P>COPYRIGHT: (C)2012,JPO&INPIT |
