Display device
According to one embodiment, a display device includes a first transparent substrate including a first main surface, a second transparent substrate including a first end portion, a liquid crystal layer containing strip-shaped polymers and liquid crystal molecules, a third transparent substrate including a second end portion and a second main surface, a first light-emitting element and a first light guide. The first light guide includes a first surface and a second surface. A height from the first main surface to the second surface is less than a height from the first main surface to the second main surface.
1. A display device comprising:
a first transparent substrate comprising a first main surface;
a second transparent substrate comprising a first end portion and opposing the first main surface;
a liquid crystal layer located between the first transparent substrate and the second transparent substrate and containing strip-shaped polymers and liquid crystal molecules;
a third transparent substrate comprising a second end portion and a second main surface on an opposite side to a surface opposing the second transparent substrate, and adhered to the second transparent substrate;
a first light-emitting element opposing the first end portion and the second end portion; and
a first light guide overlapping the first main surface and located between the first and second end portions and the first light-emitting element,
the first light guide comprising a first surface opposing the first main surface and a second surface on an opposite side to the first surface,
a height from the first main surface to the second surface being less than a height from the first main surface to the second main surface.
2. The device of claim 1 , wherein
the first surface and the second surface are parallel to each other.
3. The device of claim 2 , further comprising:
a first wiring substrate connected to the first light-emitting element and opposing the second surface;
a first adhesive layer adhering the first wiring substrate and the first light guide together;
an insulating film located between the first main surface and the first light guide; and
a second adhesive layer adhering the insulating film and the first light guide together,
wherein
the first adhesive layer and the second adhesive layer each comprise a reflective member.
4. The device of claim 3 , wherein
the first light guide comprises a third surface opposing the first end portion and the second end portion, and a fourth surface on an opposite side to the third surface and opposing the first light-emitting element, and
a distance between the third surface and the fourth surface is 20 mm or more.
5. The device of claim 2 , further comprising:
a first wiring substrate connected to the first light-emitting element and located between the first light guide and the first main surface;
an insulating film located between the first main surface and the first wiring substrate;
a first adhesive layer adhering the first wiring substrate and the first light guide together; and
a second adhesive layer adhering the first wiring substrate and the insulating film together,
wherein
the first adhesive layer comprising a reflective member, and
the second surface is in contact with an air layer.
6. The device of claim 2 , wherein
the first transparent substrate comprises a third main surface on an opposite side to the first main surface, and a third end portion,
the second transparent substrate comprises a fourth end portion on an opposite side to the first end portion, and
the third transparent substrate comprises a fourth main surface on an opposite side to the second main surface,
the device further comprises:
a second light-emitting element opposing the third end portion and the fourth end portion; and
a second light guide overlapping the fourth main surface and located between the third and fourth end portions and the second light-emitting element,
the second light guide comprises a fifth surface opposing the fourth main surface and a sixth surface on an opposite side to the fifth surface, and
a height from the fourth main surface to the sixth surface is less than a height from the fourth main surface to the third main surface.
7. The device of claim 1 , wherein
the first transparent substrate comprises a third main surface on an opposite side to the first main surface, and a third end portion,
the second transparent substrate comprises a fourth end portion on an opposite side to the first end portion, and
the third transparent substrate comprises a fourth main surface on an opposite side to the second main surface,
the device further comprises:
a second light-emitting element opposing the third end portion and the fourth end portion; and
a second light guide overlapping the fourth main surface and located between the third and fourth end portions and the second light-emitting element,
the second light guide comprises a fifth surface opposing the fourth main surface and a sixth surface on an opposite side to the fifth surface, and
a height from the fourth main surface to the sixth surface is less than a height from the fourth main surface to the third main surface.
8. The device of claim 7 , wherein
the fifth surface and the sixth surface are parallel to each other.
9. The device of claim 8 , further comprising:
a second wiring substrate connected to the second light-emitting element and opposing the sixth surface;
a third adhesive layer adhering the second wiring substrate and the second light guide together; and
a fourth adhesive layer adhering the second light guide and the third transparent substrate together,
wherein
the third adhesive layer and the fourth adhesive layer each comprise a reflective member.
10. The device of claim 8 , further comprising:
a second wiring substrate connected to the second light-emitting element and located between the second light guide and the fourth main surface;
a third adhesive layer adhering the second wiring substrate and the second light guide together; and
the fourth adhesive layer adhering the second wiring substrate and the third transparent substrate together,
wherein
the third adhesive layer comprises a reflective member, and
the sixth surface is in contact with an air layer.
11. The device of claim 1 , further comprising:
a first substrate comprising the first transparent substrate;
a second substrate comprising the second transparent substrate; and
a light source unit overlapping the first substrate,
wherein
the light source unit comprises:
the first light-emitting element;
the first light guide;
a first wiring substrate connected to the first light-emitting element;
a first adhesive layer adhering the first wiring substrate and the first light guide together; and
a second adhesive layer adhering the first substrate and the first light guide together.
12. A display device comprising:
a first transparent substrate comprising a first end portion, a first main surface and a second main surface on an opposite side to the first main surface;
a second transparent substrate comprising a second end portion and opposing the second main surface;
a liquid crystal layer located between the first transparent substrate and the second transparent substrate and containing strip-shaped polymers and liquid crystal molecules;
a third transparent substrate adhered to the second transparent substrate and comprising a third main surface;
a first light-emitting element opposing the first end portion and the second end portion; and
a first light guide overlapping the third main surface and located between the first and second end portions and the first light-emitting element,
the first light guide comprising a first surface opposing the third main surface and a second surface on an opposite side to the first surface,
a height from the third main surface to the second surface being less than a height from the third main surface to the first main surface.
13. The device of claim 12 , further comprising:
a first wiring substrate connected to the first light-emitting element and opposing the second surface;
a first adhesive layer adhering the first wiring substrate and the first light guide together; and
a second adhesive layer adhering the third transparent substrate and the first light guide together,
wherein
the first adhesive layer and the second adhesive layer each comprise a reflective member.
14. The device of claim 12 , further comprising:
a first wiring substrate connected to the first light-emitting element and located between the first surface and the third main surface;
a first adhesive layer adhering the first wiring substrate and the first light guide together; and
a second adhesive layer adhering the third transparent substrate and the first wiring substrate together,
wherein
the first adhesive layer comprises a reflective member, and
the second surface is in contact with an air layer.
15. A display device comprising:
a first transparent substrate comprising a first main surface;
a second transparent substrate comprising a first end portion and a second main surface on an opposite side to a surface opposing the first transparent substrate;
a liquid crystal layer located between the first transparent substrate and the second transparent substrate and containing strip-shaped polymers and liquid crystal molecules;
a first light-emitting element opposing the first end portion; and
a first light guide overlapping the first main surface and located between the first end portion and the first light-emitting element,
the first light guide comprising a first surface opposing the first main surface and a second surface on an opposite side to the first surface,
a height from the first main surface to the second surface being less than a height from the first main surface to the second main surface.