Patent ID: 8956038
Filing Date: 2015-02-17
Classification: G02B,Y10T

Abstract:
1. A lighting device comprising: a tiered structure including a plurality of light guide layers being arranged in tiers wherein a portion of a first surface of each lower one of the plurality of light guide layers that is not covered by an upper one of the plurality of light guide layers defines an uncovered portion of the first surface, edges of one end portions of the plurality of light guide layers being arranged in a plane to form an acceptance surface of the tiered structure; and at least one light emitting device positioned at the acceptance surface and configured to emit light into the plurality of light guide layers through the acceptance surface, wherein each of the plurality of light guide layers is configured to transmit the light therein and to emit the light from the uncovered portion of the first surface thereof, wherein the at least one light emitting device is a light emitting diode packaged in resin, wherein the at least one light emitting device comprises a light intensity adjuster arranged on a front surface of a package, the front surface facing the acceptance surface, and configured to reflect a part of the light emitted from the light emitting diode, and wherein the light intensity adjuster is further configured such that as the one end portion becomes more distant from the uncovered portion of each one of the plurality of light guide layers, the intensity of the light becomes higher.