Display device
First Claim
Patent Images
1. A display device comprising:
- an optical element which transmits or reflects incident light emitted from a light source;
a first reflective element comprising a first retroreflective surface on which the light reflected on the optical element is retroreflected, and a first specular reflection surface on which the light reflected on the optical element is specularly reflected;
a second reflective element comprising a second retroreflective surface on which the light reflected on the first specular reflection surface is retroreflected; and
a display module emitting first display light which is first circularly polarized light and second display light which is the first circularly polarized light,whereinthe optical element comprises;
a polarizing element comprising a transparent axis which transmits first linearly polarized light and reflects second linearly polarized light orthogonal to the transparent axis; and
a retardation film opposed to a surface of the polarizing element which is opposed to the light source and the first reflective element, and changing transmitted light by a phase difference,the first display light is converted into the second linearly polarized light when transmitted through the retardation film, reflected on the polarizing element, converted into second circularly polarized light in an opposite direction to the first circularly polarized light when transmitted through the retardation film, reflected on the first specular reflection surface, reflected on the second retroreflective surface, reflected on the first specular reflection surface, converted into the first linearly polarized light when transmitted through the retardation film, and transmitted through the polarizing element, andthe second display light is converted into the second linearly polarized light when transmitted through the retardation film, reflected on the polarizing element, converted into the second circularly polarized light when transmitted through the retardation film, reflected on the first retroreflective surface, converted into the first linearly polarized light when transmitted through the retardation film, and transmitted through the polarizing element.
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Accused Products
Abstract
According to one embodiment, a display device includes an optical element urging incident light to be transmitted or reflected, a first reflective element includes a first retroreflective surface in an uneven state on which the light reflected on the optical element is retroreflected, and a first specular reflection surface on which the light reflected on the optical element is specularly reflected, and a second reflective element includes a second retroreflective surface in an uneven state on which the light reflected on the first specular reflection surface is retroreflected.
9 Citations
13 Claims
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1. A display device comprising:
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an optical element which transmits or reflects incident light emitted from a light source; a first reflective element comprising a first retroreflective surface on which the light reflected on the optical element is retroreflected, and a first specular reflection surface on which the light reflected on the optical element is specularly reflected; a second reflective element comprising a second retroreflective surface on which the light reflected on the first specular reflection surface is retroreflected; and a display module emitting first display light which is first circularly polarized light and second display light which is the first circularly polarized light, wherein the optical element comprises; a polarizing element comprising a transparent axis which transmits first linearly polarized light and reflects second linearly polarized light orthogonal to the transparent axis; and a retardation film opposed to a surface of the polarizing element which is opposed to the light source and the first reflective element, and changing transmitted light by a phase difference, the first display light is converted into the second linearly polarized light when transmitted through the retardation film, reflected on the polarizing element, converted into second circularly polarized light in an opposite direction to the first circularly polarized light when transmitted through the retardation film, reflected on the first specular reflection surface, reflected on the second retroreflective surface, reflected on the first specular reflection surface, converted into the first linearly polarized light when transmitted through the retardation film, and transmitted through the polarizing element, and the second display light is converted into the second linearly polarized light when transmitted through the retardation film, reflected on the polarizing element, converted into the second circularly polarized light when transmitted through the retardation film, reflected on the first retroreflective surface, converted into the first linearly polarized light when transmitted through the retardation film, and transmitted through the polarizing element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification
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Current AssigneeJapan Display Incorporated
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Original AssigneeJapan Display Incorporated
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InventorsNumata, Yudai, Koito, Takeo
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Primary Examiner(s)Font, Frank G
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Application NumberUS15/440,751Publication NumberTime in Patent Office740 DaysField of Search35948501, 35948907, 359530, 359614US Class CurrentCPC Class CodesG02B 5/08 Mirrors vehicle mirrors inv...G02B 5/124 plural reflecting elements ...G02B 5/3083 Birefringent or phase retar...
