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US 11,237,319 B2Granted
Illumination device and display device
AssigneeJapan Display Inc.
InventorsHiroaki Kijima, Shinichi Komura, Yoichi Asakawa, Ken Onoda
Life of this patent
Estimating the term…
Abstract
According to one embodiment, the illumination device includes a first area, a second area, a first light guide, a plurality of first light sources, a second light guide, a plurality of second light sources, a first layer and a second layer. The first layer extends from the first area over a boundary between the first area and the second area, to between a second side surface of the first light guide and the boundary. The second layer extends from the second area over the boundary to between a third side surface of the second light guide and the boundary.
Claims10
An illumination device comprising:
- a first light guide comprising a first main surface, a second main surface located on an opposite side to the first main surface, a first side surface, and a second side surface located on an opposite side to the first side surface;
- a plurality of first laser light sources opposing the second side surface;
- a second light guide comprising a third main surface opposing the second main surface, a fourth main surface located on an opposite side to the third main surface, a third side surface, and a fourth side surface located on an opposite side to the third side surface;
- a plurality of second laser light sources opposing the third side surface;
- a first layer including a plurality of first prisms formed on the second main surface;
- and
- a second layer including a plurality of second prisms formed on the fourth main surface, wherein
- the first layer includes a first end portion located close to the first side surface, and a second end portion located closer to the second side surface than the first end portion,
- the second layer includes a third end portion located close to the third side surface, and a fourth end portion located closer to the fourth side surface than the third end portion,
- in a plan view, the plurality of second laser light sources, the first end portion, the fourth end portion, the second end portion, the third end portion, and the plurality of first laser light sources are arranged in this order in a first direction,
- the first layer extends over a middle point between the first side surface and the second side surface and between the third side surface and the fourth side surface,
- the second layer extends over the middle point, and
- a second length of the second layer between the fourth end portion and the middle point is greater than a first length of the first layer between the second end portion and the middle point.
10 more elements
A display device comprising:
- an illumination device;
- and
- a display panel which displays images;
- the illumination device comprising:
- a first light guide comprising a first main surface, a second main surface located on an opposite side to the first main surface, a first side surface, and a second side surface located on an opposite side to the first side surface;
- a plurality of first laser light sources opposing the second side surface;
- a second light guide comprising a third main surface opposing the second main surface, a fourth main surface located on an opposite side to the third main surface, a third side surface, and a fourth side surface located on an opposite side to the third side surface;
- a plurality of second laser light sources opposing the third side surface;
- a first layer including a plurality of first prisms formed on the second main surface;
- and
- a second layer including a plurality of second prisms formed on the fourth main surface, wherein
- the first layer includes a first end portion located close to the first side surface, and a second end portion located closer to the second side surface than the first end portion,
- the second layer includes a third end portion located close to the third side surface, and a fourth end portion located closer to the fourth side surface than the third end portion,
- in a plan view, the plurality of second laser light sources, the first end portion, the fourth end portion, the second end portion, the third end portion, and the plurality of first laser light sources are arranged in this order in a first direction,
- the first layer extends over a middle point between the first side surface and the second side surface and between the third side surface and the fourth side surface,
- the second layer extends over the middle point, and
- a second length of the second layer between the fourth end portion and the middle point is greater than a first length of the first layer between the second end portion and the middle point.
14 more elements
Dependencies are inferred from the claim text.