Patent ID: 11920781
Assignee: NICHIA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G | IPC F  G

Claim 9:
10. A lighting device comprising:
a light source;
a first optical element configured to convert light emitted from the light source into substantially parallel light; and
a plurality of second optical elements, wherein
each of the plurality of second optical elements has a light incident surface,
a first array of second optical elements of the plurality of second optical elements is arranged so as to at least partially overlap with each other when viewed in a first direction,
a second array of second optical elements of the plurality of second optical elements is arranged so as to at least partially overlap with each other when viewed in the first direction, the second array being offset from the first array in a second direction intersecting the first direction when viewed in the first direction,
each of the second optical elements of the first array of second optical elements guides at least a portion of the substantially parallel light incident on the light incident surface in the second direction and guides another portion in the first direction, and
each of the second optical elements of the second array of second optical elements guides at least a portion of the substantially parallel light incident on the light incident surface in a direction opposite to the second direction and guides another portion in the first direction.