Stereoscopic display system with active switchable retarder
View Patent ↗Disclosed herein are displays and related methods for providing stereoscopic imagery, wherein an air gap may be provided between components of the display to allow a reduction in the amount of bonding material used to bond a stereoscopic display panel with a polarization control panel (PCP) element comprising an active switchable retarder. In some embodiments, the PCP element is at least the size of the display panel such that the entirety of the display panel is covered by the PCP element, and thus there would be neither tight tolerance horizontal nor vertical alignment requirements between the PCP element and the display panel. Structural support of the components of the display may be provided by bonding around the edges of the rigid or semi-rigid stereoscopic display panel and PCP element. For example, the air gap may be created with uniform spacers between the stereoscopic display panel and the PCP element.
1. A display for providing stereoscopic imagery, the display comprising:
a stereoscopic display panel operable to provide left-eye and right-eye image encoded light;
a polarization control panel (PCP) element positioned to receive light from the stereoscopic display panel and having an active switchable retarder operable to selectively transform the state of polarization (SOP) of light received from the stereoscopic display panel in synchronization with the left-eye and right-eye image encoded light; and
wherein the stereoscopic display panel is bonded to the PCP element with an air gap therebetween, the air gap substantially coextensive along both length and width of the stereoscopic display panel, further wherein the PCP element is larger in length and width than the stereoscopic display panel such that the entirety of the stereoscopic display panel is covered by the PCP element.
2. A display in accordance with claim 1 , wherein the stereoscopic display panel is a liquid crystal (LC) display panel.
3. A display in accordance with claim 1 , wherein the stereoscopic display panel is an organic LED display panel.
4. A display in accordance with claim 1 , wherein the active switchable retarder is a liquid crystal switchable retarder.
5. A display in accordance with claim 1 , wherein the active switchable retarder comprises a pi-cell (parallel aligned) retarder or a fast electronically controlled birefringence (ECB) (anti-parallel aligned) retarder.
6. A display in accordance with claim 1 , wherein the active switchable retarder is oriented at a first angle from vertical, the PCP element further comprising a retardation element orientated at a second angle from vertical, and one or more polarization retarder films.
7. A display in accordance with claim 6 , wherein an order of the active switchable retarder, the retardation element and one or more retarder films is selected based on passive eyewear for use in viewing the left-eye and right-eye images.
8. A display in accordance with claim 1 , further comprising a polarization rotation element positioned between the stereoscopic display panel and the PCP element operable to rotate the polarization axis of light received from the stereoscopic display panel to a substantially vertical orientation.
9. A display in accordance with claim 8 , further comprising a clean-up polarizer positioned proximate to the polarization rotation element and operable to filter out unwanted light having a polarization axis that is not parallel to the vertical and thus transmit light only along the vertical orientation.
10. A display in accordance with claim 8 , wherein the PCP element comprises the polarization rotation element and the clean-up polarizer.
11. A display in accordance with claim 1 , further comprising substantially uniform spacers positioned along the perimeter of the stereoscopic display panel, the stereoscopic display panel bonded to the PCP element using said substantially uniform spacers.
12. A display for providing stereoscopic imagery, the display comprising:
a stereoscopic display panel operable to provide left-eye and right-eye image encoded light;
a polarization control panel (PCP) element positioned to receive light from the stereoscopic display panel, the PCP element being larger in length and width than the stereoscopic display panel such that the entirety of the stereoscopic display panel is covered by the PCP element, the PCP element having an active switchable retarder operable to selectively transform the state of polarization (SOP) of light received from the stereoscopic display panel in synchronization with the left-eye and right-eye image encoded light; and
substantially uniform spacers positioned along the perimeter of the stereoscopic display panel, wherein the stereoscopic display panel is bonded to the PCP element using said substantially uniform spacers to provide an air gap therebetween, the air gap substantially coextensive along both length and width of the stereoscopic display panel.
13. A display in accordance with claim 12 , wherein the stereoscopic display panel is a liquid crystal (LC) display panel.
14. A display in accordance with claim 12 , wherein the stereoscopic display panel is an organic LED display panel.
15. A display in accordance with claim 12 , wherein the active switchable retarder is a liquid crystal switchable retarder.
16. A display in accordance with claim 12 , wherein the switchable retarder comprises a pi-cell (parallel aligned) retarder or a fast electronically controlled birefringence (ECB) (anti-parallel aligned) retarder.
17. A display in accordance with claim 12 , wherein the active switchable retarder is oriented at a first angle from vertical, the PCP element further comprising a retardation element orientated at a second angle from vertical, and one or more polarization retarder films.
18. A display in accordance with claim 17 , wherein an order of the active switchable retarder, the retardation element and one or more retarder films is selected based on passive eyewear for use in viewing the left-eye and right-eye images.
19. A display in accordance with claim 12 , further comprising a polarization rotation element positioned between the stereoscopic display panel and the PCP element operable to rotate the polarization axis of light received from the stereoscopic display panel to a substantially vertical orientation.
20. A display in accordance with claim 19 , further comprising a clean-up polarizer positioned proximate to the polarization rotation element and operable to filter out unwanted light having a polarization axis that is not parallel to the vertical and thus transmit light only along the vertical orientation.
21. A display in accordance with claim 20 , wherein the PCP element comprises the polarization rotation element and the clean-up polarizer.
22. A display for providing stereoscopic imagery, the display comprising:
an organic LED display panel operable to provide left-eye and right-eye image encoded light;
a polarization control panel (PCP) element positioned to receive light from the organic LED display panel, the PCP element being larger in length and width than the LC display panel such that the entirety of the organic LED display panel is covered by the PCP element, the PCP element having an active LC switchable retarder operable to selectively transform the state of polarization (SOP) of light received from the organic LED display panel in synchronization with the left-eye and right-eye image encoded light; and
wherein the organic LED display panel is bonded to the PCP element with an air gap therebetween, the air gap substantially coextensive along both length and width of the organic LED display panel.
23. A display in accordance with claim 22 , wherein the active LC switchable retarder comprises a pi-cell (parallel aligned) retarder or a fast electronically controlled birefringence (ECB) (anti-parallel aligned) retarder.
24. A display in accordance with claim 22 , wherein the active LC switchable retarder is oriented at a first angle from vertical, the PCP element further comprising a retardation element orientated at a second angle from vertical, and one or more polarization retarder films.
25. A display in accordance with claim 24 , wherein an order of the active switchable retarder, the retardation element and one or more retarder films is selected based on passive eyewear for use in viewing the left-eye and right-eye images.
26. A display in accordance with claim 22 , further comprising:
a polarization rotation element positioned between the stereoscopic display panel and the PCP element operable to rotate the polarization axis of light received from the stereoscopic display panel to a substantially vertical orientation; and
a clean-up polarizer positioned proximate to the polarization rotation element and operable to filter out unwanted light having a polarization axis that is not parallel to the vertical and thus transmit light only along the vertical orientation.
27. A display in accordance with claim 26 , wherein the PCP element comprises the polarization rotation element and the clean-up polarizer.
28. A display in accordance with claim 22 , further comprising substantially uniform spacers positioned along the perimeter of the organic LED display panel, the organic LED display panel bonded to the PCP element using said substantially uniform spacers.