Patent ID: 9658380
Date: 2017-05-23
CPC Classifications: G02B

Claim:
1. A planar light guide device comprising: a light source comprising a substrate, and light-emitting elements that are electrically connected to the substrate and are arranged on a mounting surface of the substrate to be an alignment on a center line between two long edges of the mounting surface of the substrate; and a light-transmitting resin sealing the light-emitting elements and the mounting surface of the substrate, the light-transmitting resin comprising a first side and a second side that is an opposite side of the first side wherein the light-emitting elements each comprises a light-emitting surface that is positioned in the light-transmitting resin between the first side and the second side of the light-transmitting resin, the first side of the light-transmitting resin comprises optical elements that are arranged in a region adjacent to the light-emitting elements, and each of the optical elements comprises a first surface and a second surface that is smaller in area than the first surface, and the first surface of the optical element is inclined with an angle that is in a range of one to 40 degrees with respect to a surface that is perpendicular to the mounting surface of the substrate with an edge of the surface in parallel with the center line between the two long edges of the mounting surface of the substrate, the second side of the light-transmitting resin comprises optical elements that are arranged in a region adjacent to the light-emitting elements, and each of the optical elements comprises a first surface and a second surface that is smaller in area than the first surface, and the first surface of the optical element is inclined with an angle that is in a range of one to 40 degrees with respect to a surface that is perpendicular to the mounting surface of the substrate with an edge of the surface in parallel with the center line between the two long edges of the mounting surface of the substrate.