| CPC F21V 5/02 (2013.01) [A47F 3/001 (2013.01); G02B 6/0053 (2013.01); G02B 6/0058 (2013.01); F21V 2200/20 (2015.01); G02B 6/0073 (2013.01); G07F 9/02 (2013.01)] | 8 Claims |
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1. An illumination device, comprising:
a transparent light guide plate comprising an end face comprising an incident surface, and a bend located between the incident surface and a distal end face opposite to the incident surface; and
a light source facing the incident surface, wherein
the light guide plate comprises:
a plurality of first prisms on a first surface of the light guide plate extending from the incident surface to the bend, the plurality of first prisms being configured to reflect light emitted from the light source and entering the light guide plate through the incident surface and emit the light in a downward direction through a second surface opposite to the first surface;
a plurality of second prisms on a third surface of the light guide plate extending from the distal end face to the bend, the third surface comprising a surface of the light guide plate facing in an outward direction, the plurality of second prisms being configured to reflect light emitted from the light source and entering the light guide plate through the incident surface and emit the light in an inward direction through a fourth surface opposite to the third surface; and
a plurality of third prisms arranged in a predetermined pattern on the fourth surface, the plurality of third prisms being configured to reflect light entering the light guide plate and emit the light through the third surface to display the predetermined pattern in the outward direction, and
the distal end face comprises an angled slope formed such that light is emitted from the distal end face in a direction that is angled upward relative to the light emitted through the fourth surface.
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