Patent ID: 11958405
Assignee: PANASONIC AUTOMOTIVE SYSTEMS CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. The illumination device according to claim 4, wherein
in a state in which the illumination device is mounted on the ceiling, the light source is located below the light guide in the up and down direction and emits the light upward in the up and down direction,
the second surface includes a second inclined surface that, in a state in which the illumination device is mounted on the ceiling, is inclined toward where the first surface is located as a position on the second inclined surface moves upward in the up and down direction,
the light guide includes an entry surface that is located above the light source in the up and down direction in a state in which the illumination device is mounted on the ceiling and that receives the light emitted from the light source, and an exit surface that extends downward in the up and down direction from the second surface to the first surface in a state in which the illumination device is mounted on the ceiling and that transmits the light received via the entry surface,
the second inclined surface reflects the light that has entered the light guide via the entry surface toward the first inclined surface,
the first inclined surface reflects the light reflected by the second inclined surface toward the exit surface, and
the exit surface transmits the light reflected by the first inclined surface out of the light guide.