Patent ID: 11947216
Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A backlight apparatus comprising:
a light source configured to emit blue light;
a light guide layer including a first main surface, a second main surface on a side opposite to the first main surface, at least one light-receiving side surface intersecting the first and second main surfaces and receiving the blue light emitted from the light source, and at least one non-light-receiving side surface intersecting the first and second main surfaces and not receiving the blue light;
a quantum dot phosphor layer provided on the first main surface side of the light guide layer, the quantum dot phosphor layer including a third main surface facing the first main surface, a fourth main surface on a side opposite to the third main surface, and a side surface intersecting the third and fourth main surfaces, and the quantum dot phosphor layer including a red quantum dot phosphor receiving the blue light and emitting red light and a green quantum dot phosphor receiving the blue light and emitting green light;
a reflective layer disposed on the second main surface side of the light guide layer; and
a yellow phosphor layer provided facing the at least one non-light-receiving side surface of the light guide layer, the yellow phosphor layer including a yellow phosphor receiving the blue light and emitting yellow light,
wherein the third main surface of the quantum dot phosphor layer is in contact with the first main surface of the light guide layer.