Lighting device

1. A lighting device comprising:

at least one lighting unit; and

at least one mounting unit that mounts the at least one lighting unit on a mounting target, wherein

the at least one lighting unit includes:

a lighting sheet; and

a supporting member supporting the lighting sheet, in a flat state, in at least a portion of a peripheral portion of the lighting sheet, the supporting member including at least one first attachment portion,

the at least one first attachment portion is only provided at an upper portion of the supporting member,

the at least one mounting unit includes at least one attaching member including at least one second attachment portion and at least one third attachment portion, the at least one second attachment portion being fixed to the at least one first attachment portion, and the at least one third attachment portion being fixed to the mounting target,

the lighting sheet includes:

a base material having optical transparency,

a plurality of lighting portions having optical transparency which are provided in a first surface of the base material, and

a void portion which is provided between the plurality of lighting portions, and

a portion of a side surface of the plurality of lighting portions facing the void portion serves as a reflecting surface reflecting light which is incident to the plurality of lighting portions.

2. The lighting device according to claim 1 , wherein

the supporting member is defined by a frame body, and

the frame body supports the lighting sheet such that the frame body surrounds the peripheral portion of the lighting sheet.

3. The lighting device according to claim 2 , wherein the frame body includes a groove portion in an inner wall surface in which the lighting sheet is disposed and supports the lighting sheet by inserting the peripheral portion of the lighting sheet into the groove portion.

4. The lighting device according to claim 3 , wherein a gap is provided between a bottom surface of the groove portion and the lighting sheet.

5. The lighting device according to claim 2 , wherein

the at least one attaching member includes a plurality of attaching members, and

the plurality of attaching members are provided at one side of the frame body.

6. The lighting device according to claim 1 , wherein

the at least one lighting unit includes a plurality of lighting units, and

a coupling member coupling the plurality of lighting units is provided in the supporting member.

7. The lighting device according to claim 1 , wherein an inclined surface which is inclined to an incident direction side of light with respect to a main surface of the lighting sheet in a normal direction is provided in a portion of the supporting member.

8. The lighting device according to claim 1 , wherein a light transmitting portion is provided in a portion of the supporting member.

9. The lighting device according to claim 1 , further comprising:

a rotation mechanism which rotates the at least one lighting unit around a rotating shaft which is parallel to a main surface of the lighting sheet.

10. The lighting device according to claim 9 , wherein

the at least one mounting unit includes a plurality of mounting units which are arranged in one direction, and

the rotation mechanism rotates the at least one lighting unit around a rotating shaft extending in a direction parallel to an arrangement direction of the plurality of mounting units.

11. The lighting device according to claim 9 , wherein

the at least one mounting unit includes a plurality of mounting units which are arranged in one direction,

the plurality of mounting units are detachable from the at least one lighting unit, and

the rotation mechanism rotates the at least one lighting unit around a rotating shaft extending in a direction parallel to an arrangement direction of the plurality of mounting units.

12. The lighting device according to claim 1 , wherein an elastic body is provided in at least a portion of the supporting member.

13. The lighting device according to claim 1 , wherein the supporting member is expandable in a direction along an outer periphery of the lighting sheet.

14. The lighting device according to claim 1 , wherein a member for managing a temperature is provided in the at least one lighting unit.

15. The lighting device according to claim 1 , wherein the at least one mounting unit is detachable from the at least one lighting unit.

16. The lighting device according to claim 15 , wherein the at least one mounting unit is fixed to the at least one lighting unit by using a screw.

17. The lighting device according to claim 1 , wherein the mounting target is a window frame.