Microstructure optical phase shifting film and lens
The present invention discloses a microstructure optical phase shifting film and lens. The optical phase shifting film is an integrated structure which includes a light-phase-shifting-film base and the convex surface positioned thereon. The convex surface has a plurality of semi-cylinder like protrusions which have the same height and are separated from a constant pitch with each other. A lens layer is covered on the surface of the optical phase shifting film to form a microstructure lens. The optical phase shift film exhibits different refractive index because of the light with different polarization angle. Therefore, the microstructure functions as a lenticular lens used in 2D/3D switching display.
1. A microstructure optical phase shifting film for switching between 2D and 3D display, which is monocoque, comprising:
a switching crystal layer including molecules of crystal with polarization films over and under the switching crystal layer wherein orientation of the molecules of the crystal is changed when a polarization voltage is applied to the polarization films;
a light-phase-shifting-film base with a thickness and a rectangular shape of the top view, wherein the light-phase-shifting-film base is positioned on the switching crystal layer, and has two lateral sides with equal lengths and two longitudinal sides with equal lengths;
a convex surface positioned on the light-phase-shifting-film base with a plurality of semi-cylinder like protrusions with equal heights arrayed in a constant pitch and parallel to each other, wherein the heights are measured from highest points of the semi-cylinder like protrusions to points where the semi-cylinder like protrusions intersect the light-phase-shifting-film base, and an axis of the semi-cylinder like protrusions and an alignment phase of material molecules of the microstructure optical phase shifting film form an angle.
2. The microstructure optical phase shifting film of claim 1 , wherein factors used to change to refraction index of the microstructure optical phase shifting film comprising: the angle, the height of the semi-cylinder like protrusions, the constant pitch of the semi-cylinder like protrusions, or a polarization angle of an incident light.
3. The microstructure optical phase shifting film of claim 1 , wherein the constant pitch of the semi-cylinder like protrusions is 120 μm˜450 μm.
4. The microstructure optical phase shifting film of claim 1 , wherein the constant pitch of the semi-cylinder like protrusions is 150 μm˜200 μm.
5. The microstructure optical phase shifting film of claim 1 , wherein the height of the semi-cylinder like protrusions is 10 μm˜180 μm.
6. The microstructure optical phase shifting film of claim 1 , wherein the thickness of the light-phase-shifting-film base is 50 μm˜150 μm.
7. The microstructure optical phase shifting film of claim 1 , wherein the material of the microstructure optical phase shifting film is transparent material comprising: polyvinyl chloride (PVC), polycarbonate (PC), polyvinyl alcohol (PVA), polyethylene terephthalate (PET), polyethylene (PE), tri-acetyl cellulose (TAC), cellulose Acetate Propionate (CAP).
8. A lens comprising the microstructure optical phase shifting film of claim 1 , further comprising a lens layer with a first refraction index on the semi-cylinder like protrusions, wherein an incident light with a polarization angle from a bottom flat surface of the light-phase-shifting-film base penetrates the microstructure optical phase shifting film and the lens layer.
9. The lens of claim 8 , wherein a first refraction index of the microstructure optical phase shifting film in a first polarization angle of the incident light is different from a second refraction index of the microstructure optical phase shifting film in a second polarization angle of the incident light.
10. The lens of claim 9 , wherein the first polarization angle comprises 0 or 180 degree and the second polarization angle comprises 90 or 270 degree.
11. The lens of claim 9 , wherein the first polarization angle comprises 90 or 270 degree and the second polarization angle comprises 0 or 180 degree.