Display device
AssigneeAlps Alpine Co., Ltd.
InventorShingo YUZA
Life of this patent
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Abstract
A display device capable of displaying an aerial image by using retroreflection. The display device includes: a light source; a polarizing beam splitter arranged at a position on which light from the light source is incident; a retroreflecting member; a λ/4 plate arranged on a surface of the retroreflecting member; and a light attenuating filter arranged on the surface of the λ/4 plate. The retroreflecting member receives light reflected by the polarizing beam splitter and transmitted through the light attenuating filter and the λ/4 plate, and the polarizing beam splitter transmits light retroreflected by the retroreflecting member and transmitted through the λ/4 plate and the light attenuating filter to form the aerial image.
Claims5
A display device capable of displaying an aerial image by using retroreflection, the display device comprising:
- a light source;
- a polarizing beam splitter arranged at a position on which light from the light source is incident;
- a retroreflecting member;
- a λ/4 plate arranged on a surface of the retroreflecting member;
- and
- a light attenuating filter arranged on the surface of the λ/4 plate, wherein
- the retroreflecting member receives light reflected by the polarizing beam splitter and transmitted through the light attenuating filter and the λ/4 plate, and
- the polarizing beam splitter transmits light retroreflected by the retroreflecting member and transmitted through the λ/4 plate and the light attenuating filter to form the aerial image.
A display device capable of displaying an aerial image by using retroreflection, the display device comprising:
- a light source;
- a half mirror arranged at a position on which light from the light source is incident;
- a retroreflecting member;
- and
- a polarizing plate arranged on a surface of the retroreflecting member, wherein
- the retroreflecting member receives light reflected by the half mirror and transmitted through the polarizing plate, and
- the half mirror transmits light retroreflected by the retroreflecting member and transmitted through the polarizing plate to form the aerial image.
Dependencies are inferred from the claim text.