Display device having an anisotropic scattering member
View Patent ↗Disclosed herein is a display device including a reflection type image display portion having a sheet-like anisotropic scattering member. In an area, in an in-plane direction, of the anisotropic scattering member, a low-refractive index area and a high-refractive index area are disposed in a mixture style. The anisotropic scattering member is disposed so that a light is scattered when an outside light is made incident from a surface side on which a degree of a change in a refractive index in a vicinity of a boundary between the low-refractive index area and the high-refractive index area is relatively large, and is emitted from a surface side on which the degree of the change in the refractive index in the vicinity of the boundary between the low-refractive index area and the high-refractive index area is relatively small.
1. A display device comprising
a reflection type image display portion including a sheet-like anisotropic scattering member,
wherein in an area, in an in-plane direction, of the anisotropic scattering member, a low-refractive index area and a high-refractive index area are disposed in a mixture style,
the high-refractive index area has a louver-like shape, and the low-refractive index area is formed in a peripheral area surrounding the high-refractive index area,
the anisotropic scattering member includes a first scattering layer and a second scattering layer, and
a first direction in which a high-refractive index area of the first scattering layer having the louver-like shape extends intersects with a second direction in which a high-refractive index area of the second scattering layer having the louver-like shape extends.
2. The display device according to claim 1 ,
wherein the image display portion has a rectangular shape,
the first direction is along a short side of the image display portion, and
the second direction is along a long side of the image display portion.
3. The display device according to claim 1 ,
wherein each of the first scattering layer and the second scattering layer includes a first surface and a second surface, the first surface having a relatively large degree of change in a refractive index in a vicinity of a boundary between the low-refractive index area and the high-refractive index area, and the second surface having a relatively small degree of change in the refractive index in the vicinity of the boundary between the low-refractive index area and the high-refractive index area.
4. The display device according to claim 1 ,
wherein the anisotropic scattering member is disposed so that light is scattered when outside light reflected within the image display portion is transmitted through the anisotropic scattering member.
5. The display device according to claim 1 ,
wherein the anisotropic scattering member is disposed so that light is scattered when outside light made incident from an outside is transmitted through the anisotropic scattering member.
6. The display device according to claim 1 ,
wherein the image display portion has a reflection type liquid crystal display panel including a front substrate, a back substrate, and a liquid crystal material layer disposed between the front substrate and the back substrate, and
the anisotropic scattering member is disposed on the front substrate side.
7. The display device according to claim 1 ,
wherein the first scattering layer and the second scattering layer are different in scattering characteristics from one another and laminated one upon another.