Patent ID: 9180810
Filing Date: 2015-11-10
Classification: B60Q

Abstract:
1. A base comprising a fiber base layer that includes fibers, wherein a basis weight of the base is in a range from 300 to 1,500 g/m wherein a thickness of the base is in a range from 1 to 10 mm, wherein a content of fibers in the fiber base layer is in a range from 20% to 70% by mass based on 100% by mass of the fiber base layer, and wherein the base has a transmittance calculated by an equation of [(B/A)×100(%)] of 35% to 75%, where, A is an illuminance measured at an irradiation target surface directly under a center of a surface-emitting light source (100 mm×100 mm) when a light is emitted from the surface-emitting light source that is disposed at a distance of 600 mm from the irradiation target surface so that an emitting surface of the surface-emitting light source is parallel to the irradiation target surface, and B is an illuminance measured at the irradiation target surface directly under the center of the surface-emitting light source when a light is emitted from the surface-emitting light source that is disposed on a back side of the base, the base being disposed at a distance of 600 mm from the irradiation target surface so that an emitting surface of the base is parallel to the irradiation target surface.