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US 2019/0317266 A1Published application
Display device
AssigneeOMRON Corporation
InventorsMasayuki Shinohara, Gouo Kurata, Tsuyoshi Arai, Norikazu Kitamura, Yuto Mori
Life of this patent
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Abstract
To make a displayed image clear. A display device emits image light reflected by a plurality of prisms (141) provided in a light guide plate (14) from a light exit surface (14c). The prism (141) has a reflective surface (141a) that reflects and emits the image light. The reflective surface (141a) is formed in a curved shape in a thickness direction of the light guide plate (14).
Claims15
A display device comprising a light guide plate, wherein
- image light is entered from an end face of the light guide plate, and the image light is emitted from a light exit surface of the light guide plate, the image light being reflected or refracted by each of a plurality of emission structure units provided on the light guide plate,
- the emission structure unit has an optical surface configured to reflect or refract and emit the image light,
- the optical surface is formed in a curved shape in a thickness direction of the light guide plate
- the emission structure unit is provided on a bottom surface of the light guide plate, the bottom surface facing the light exit surface, so as to protrude from the bottom surface toward the light exit surface,
- the optical surface is formed such that an angle formed with the light exit surface increases as approaching the light exit surface in a thickness direction of the light guide plate,
- the image light is reflected by the optical surface to form a real image, and
- an angle formed between the light exit surface and an end of the optical surface of the emission structure unit on a side farther from the end face in a direction in which the image light is guided by the light guide plate is equal to or smaller than an angle formed between the light exit surface and an end of the optical surface of each of adjacent emission structure units on a side closer to the end face in the direction in which the image light of the emission structure unit is guided by the light guide plate.
4 more elements
2-4. (canceled)
A display device comprising a light guide plate,
- wherein image light is entered from an end face of the light guide plate, and the image light is emitted from a light exit surface of the light guide plate, the image light being reflected or refracted by each of a plurality of emission structure units provided on the light guide plate,
- wherein the emission structure unit has an optical surface configured to reflect or refract and emit the image light, the optical surface is formed in a curved shape in a thickness direction of the light guide plate,
- wherein the emission structure unit is provided on a bottom surface of the light guide plate, the bottom surface facing the light exit surface, so as to protrude from the bottom surface toward the light exit surface,
- wherein the optical surface is formed such that an angle formed with the light exit surface decreases as approaching the light exit surface in a thickness direction of the light guide plate,
- wherein the image light is refracted by the optical surface to form a virtual image, and
- wherein an angle formed between the light exit surface and an end of the optical surface of the emission structure unit on a side farther from the end face in a direction in which the image light is guided by the light guide plate is equal to or greater than an angle formed between the light exit surface and an end of the optical surface of each of adjacent emission structure units on a side closer to the end face in the direction in which the image light of the emission structure unit is guided by the light guide plate.
3 more elements
Dependencies are inferred from the claim text.