Patent ID: 9417362
Filing Date: 2016-08-16
CPC Classification: G02B,G02F

Claim Text:
1. A reflective structure comprising: a reflective film configured to reflect, diffract, and diffuse incident light omni-directionally, the reflective film including, a plurality of first concave-convex elements having a curved surface, and a plurality of second concave-convex elements on the curved surface, the second concave-convex elements being a smaller scale than a scale of the first concave-convex elements, and the reflective film including a plurality of first layers and a plurality of second layers alternately stacked in turns; and a color purity control element configured to substantially reduce degradation of a color purity expressed by the reflective film, the color purity control element including a pair of complementary-color absorption layers made of different material from both the first layers and the second layers, the pair of complementary-color absorption layers directly on the first layers at opposite surfaces of the first layers and the second layers alternately stacked, respectively, the pair of complementary-color absorption layers configured to absorb a complementary light with respect to a color light reflected by the reflective film.