Display device
AssigneeMagnolia White Corporation
InventorsShinichi Komura, Kazutaka Nagaoka
Life of this patent
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Abstract
According to one embodiment, a display device includes an illumination device, a display panel opposed, a first retardation film, a holographic optical element, a second retardation film, a reflection polarizer spaced apart from the holographic optical element, and configured to transmit first linearly polarized light and reflect second linearly polarized light orthogonal to the first linearly polarized light, and a polarization conversion element located between the second retardation film and the reflection polarizer, and configured to maintain a polarization direction of the display light and rotate a polarization direction of external light transmitted through the light guide.
Claims15
A display device comprising:
- an illumination device comprising a light guide, and a light emitting element opposed to a side surface of the light guide;
- a display panel opposed to a first main surface of the light guide and configured to emit display light of linearly polarized light;
- a first retardation film opposed to the display panel;
- a holographic optical element opposed to the first retardation film;
- a second retardation film opposed to the holographic optical element;
- a reflection polarizer spaced apart from the holographic optical element, and configured to transmit first linearly polarized light and reflect second linearly polarized light orthogonal to the first linearly polarized light;
- and
- a polarization conversion element located between the second retardation film and the reflection polarizer, and configured to maintain a polarization direction of the display light and rotate a polarization direction of external light transmitted through the light guide.
A display device comprising:
- an illumination device including a light guide, and a light emitting element opposed to a side surface of the light guide;
- a display panel opposed to a first main surface of the light guide and configured to emit display light of linearly polarized light;
- a first retardation film opposed to the display panel;
- a half mirror opposed to the first retardation film;
- a second retardation film opposed to the half mirror;
- a reflection polarizer spaced apart from the half mirror, and configured to transmit first linearly polarized light and reflect second linearly polarized light orthogonal to the first linearly polarized light;
- a polarization conversion element located between the second retardation film and the reflection polarizer, and configured to maintain a polarization direction of the display light and rotate a polarization direction of external light transmitted through the light guide;
- a third retardation film opposed to the reflection polarizer;
- and
- a lens element opposed to the third retardation film, configured to condense first circularly polarized light which is the display light transmitted through the third retardation film, and configured to transmit the first circularly polarized light which is the external light transmitted through the third retardation film without condensing the first circularly polarized light.
Dependencies are inferred from the claim text.