Planar light device
AssigneeHon Hai Precision Ind. Co., Ltd.
InventorsJyh-Chain Lin, Ga-Lane Chen
Life of this patent
Estimating the term…
Abstract
A planar light device (30) for emitting light beams, including a light guide plate (31) having a plurality of diffraction grating units (33). The light guide plate includes a light-emitting surface (313), an opposite bottom surface, and a light incident surface (311) disposed therebetween. A light source (32) is disposed adjacent to the light incident surface. The diffraction grating units cover the bottom surface of the light guide plate. Each diffraction grating unit is divided into a first part (A) and a second part (B), the first and second parts having different alignment directions from each other.
Claims17
A planar light device for emitting light beams, comprising:
- a light source used to emit light rays;
- a light guide plate optically coupling with the light source to guide the light rays and to convert the light rays into planar light, the light guide plate having a bottom surface, a light-emitting surface opposite to the bottom surface, and a light incident surface adjoining the light-emitting surface and the bottom surface;
- and
- a plurality of diamond-shaped diffraction grating units formed on the bottom surface of the light guide plate, each diffraction grating unit being divided into a first part and a second part, the corresponding first and second parts having a different alignment direction orthogonal to the other and oblique to the light incident surface of the light guide plate, the corresponding first and second parts each including a plurality of grooves extending in the alignment direction associated therewith.
A planar light device for emitting light beams, comprising:
- a light source used to emit light rays;
- a light guide plate optically coupling with the light source to guide the light rays and to convert the light rays into planar light, the light guide plate having a bottom surface, a light-emitting surface opposite to the bottom surface, and a light incident surface adjoining the light-emitting surface and the bottom surface;
- and
- a layer of diamond-shaped diffraction gratings covering the bottom surface of the light guide plate, the diffraction gratings each having at least two orthogonal alignment directions associated therewith, the two orthogonal alignment directions being oblique to the light incident surface of the light guide plate, each diffraction grating including a plurality of grooves, each groove extending in the alignment direction corresponding thereto.
A planar light device for emitting light beams, comprising:
- a light source used to emit light rays;
- a light guide plate optically coupling with the light source to guide the light rays and to convert the light rays into planar light, the light guide plate having a bottom surface, a light-emitting surface opposite to the bottom surface, and a light incident surface adjoining the light-emitting surface and the bottom surface;
- and
- a plurality of diamond-shaped diffraction grating units distributed on the bottom surface of the light guide plate, the diffraction grating units defining at least two orthogonal alignment directions commonly toward the light-emitting surface and oblique to the light incident surface of the light guide plate, each diffraction grating unit including a plurality of grooves, each groove extending in the alignment direction corresponding thereto.
Dependencies are inferred from the claim text.