Patent ID: 11953712
Assignee: JAPAN DISPLAY INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F

Claim 0:
1. An illumination device comprising:
a first light guide having a first main surface, a second main surface on a side opposite to the first main surface, a first side surface, and a second side surface on a side opposite to the first side surface;
a second light guide having a third main surface opposed to the second main surface, a fourth main surface on a side opposite to the third main surface, a third side surface close to the first side surface, and a fourth side surface located on a side opposite to the third side surface and close to the second side surface;
a plurality of first light sources opposed to the first side surface; and
a plurality of second light sources opposed to the fourth side surface, wherein
the first main surface includes a first plane and a plurality of first grooves located between the first plane and the first side surface,
the second main surface includes a plurality of second grooves opposed to the first plane and orthogonal to the first grooves, and a second plane located between the second grooves and the first side surface,
the third main surface includes a third plane and a plurality of third grooves located between the third plane and the fourth side surface and parallel to the first grooves, and
the fourth main surface includes a plurality of fourth grooves opposed to the third plane and orthogonal to the third grooves, and a fourth plane located between the fourth grooves and the fourth side surface.