Patent ID: 9494825
Filing Date: 2016-11-15
CPC Classification: G02B,G02F

Claim Text:
1. A condensing sheet comprising: a light output unit that has a plurality of lenses; and a light input unit that faces the light output unit and includes a light penetration unit and a light reflection unit, wherein the light input unit has grooves and protrusions, the grooves function as the light penetration unit, and the protrusions function as the light reflection unit; wherein the protrusions include a recess sinking toward the light output unit, and the recess receives a reflector; wherein a center of the reflector has a thickness in the range of 3 to 100 μm, wherein at least two sides of the reflector are inclined, and the thickness of the at least two sides of the reflector along the incline is in the range of 3 to 150 μm, and wherein the at least two sides of the reflector coincide with corresponding inclined sides of the recess; wherein the grooves have a depth in the range of more than 0 μm and 100 μm or less, and the recess has a depth in the range of 2 to 50 μm; wherein an exposed surface of the reflector that is exposed outside of the recess is a convex surface, wherein the recess has a depth which smaller than the depth of each of the grooves, wherein the recess has a trapezoidal section, wherein the reflector has a trapezoidal section, wherein the reflector is made of a resin to which a reflection substance is added in an amount of 20 to 80 wt %, and wherein the reflection substance includes at least one reflection pigment selected from the group consisting of BaSO wherein the reflector is disposed to have a corresponding position to a contact area at which the adjacent lenses are in contact with each other, such that the at least two sides of the reflector are inclined toward the contact area at which adjacent lenses are in contact with each other to maximize direct illumination.