Patent ID: 8430519
Filing Date: 2013-04-30
Classification: G02B,G02F

Abstract:
1. A lighting device comprising: at least one point light source; an optical member provided on a light output side of the lighting device from the point light source, the optical member being a member having a substantially uniform light reflectance; a first light reflecting portion arranged on a portion of the optical member that overlaps the point light source, the first light reflecting portion reflecting light from the point light source and being defined by a pattern having light reflectivity; a light scattering portion arranged on a portion of the optical member that does not overlap the point light source, the light scattering portion scattering the light emitted from the point light source and being defined by a pattern having a light scattering property; and a second light reflecting portion provided to reflect the light that is reflected by the first light reflecting portion to be directed to the first light reflecting portion; wherein the pattern of the first light reflecting portion is configured such that an area of each portion of the pattern of the first light reflecting portion decreases in a direction away from the portion that overlaps the point light source, and the pattern of the light scattering portion is configured such that an area of each portion of the pattern of the light scattering portion increases in a direction away from the portion of the first light reflecting portion that overlaps the point light source.