Patent ID: 9732939
Date: 2017-08-15
CPC Classifications: B60Q,F21S,F21V,F21Y,G02B

Claim:
1. An optical member, comprising: a base substrate; a pattern layer including a plurality of patterns sequentially arranged on a first surface of the base substrate in a first direction, and a plurality of separation portions disposed between adjacent ones of the plurality of patterns; and a reflective portion disposed directly on the plurality of patterns; wherein the plurality of patterns implement a line shaped beam of a first path crossing at right angles to respective pattern extension directions of the multiple patterns by guiding a first incident beam into a first surface direction toward which the first surface looks or a second surface direction toward which a second surface of the base substrate opposite to the first surface looks, through refraction or reflection from the inclined surfaces, and wherein an optical width of the line shaped beam is smaller than a width of a light emitting surface of a light source irradiating light to the plurality of patterns, and a length of the line shaped beam is larger than the optical width; wherein a rate of a height to a width (h/w) of the plurality of patterns is 0.5 or less, wherein the plurality of patterns have a circular or elliptic shape and extend in a second direction which intersects to the first direction, wherein, a width of each of the separation portions is smaller than the width of each of the patterns, wherein each of the separation portions has a flat surface, wherein the reflective portion includes a shape corresponding to a shape of the plurality of patterns, and wherein a distance between two adjacent patterns among the plurality of patterns ranges from 10 to 500 μm; the plurality of patterns serve as indirect light sources in which optical paths become longer in order as a distance from light sources increases, thereby creating a three-dimensional effect beam in a thickness direction of the base substrate.