Segmented polarization control panel
AssigneeRealD Inc.
InventorsMichael G. Robinson, Jianmin Chen
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Abstract
This disclosure describes stereoscopic flat panel display systems based on the polarization encoding of sequentially displayed left and right eye images. The systems comprise line-by-line addressed liquid crystal display (LCD) panels, illuminating back light units and polarization control panels (PCPs). Right and left eye images are written sequentially onto the LCD whose polarization is controlled by a substantially synchronously driven PCP. The backlight may be continuously illuminated, or modulated temporally, spatially or both, as can the PCP.
Claims21
A polarization control panel (PCP) for a stereoscopic display, operable to selectively transform the state of polarization of modulated light from an image modulation panel, the PCP having a plurality of polarization control segments, the PCP comprising:
- a liquid crystal (LC) layer disposed on a first plane;
- a common electrode disposed on a first side of the LC layer, and parallel to the first plane;
- a first electrode disposed on a second side of the LC layer, on a second plane that is parallel to the first plane;
- and
- a second electrode disposed on the second side of the LC layer, on a third plane, wherein a portion of the first electrode overlaps with the second electrode and is conductively isolated from the second electrode;
- wherein the first electrode is operable to cause the second electrode to be driven to a voltage potential, and
- wherein the PCP is operable to transform the state of polarization of the modulated light from the image modulation panel in accordance with the voltage potential of the second electrode being driven by the first electrode.
A polarization control panel (PCP) for a stereoscopic display, operable to transform the state of polarization of modulated light from an image modulation panel, the PCP having a plurality of polarization control segments, the PCP comprising:
- a liquid crystal (LC) layer;
- a common electrode disposed on a first side of the LC layer;
- a first electrode disposed on a second side of the LC layer;
- a second electrode disposed on the second side of the LC layer;
- and
- an intermediate electrode disposed on the second side of the LC layer and overlapping a portion of the first electrode and the second electrode;
- wherein the first electrode is operable to cause the intermediate electrode to be driven to a voltage potential, and
- wherein the PCP is operable to transform the state of polarization of the modulated light from the image modulation panel in accordance with the voltage potential of the second electrode being driven by the first electrode.
A polarization control panel (PCP) for a stereoscopic display, operable to transform the state of polarization of modulated light from an image modulation panel, the PCP having a plurality of polarization control segments, the PCP comprising:
- a liquid crystal (LC) layer;
- a common electrode disposed on a first side of the LC layer;
- a first electrode disposed on a second side of the LC layer;
- a second electrode disposed on the second side of the LC layer;
- and
- an intermediate electrode disposed on the second side of the LC layer and overlapping a portion of the first electrode and the second electrode;
- wherein the intermediate electrode follows an average of drive electrode voltages between the first and second electrodes.
Dependencies are inferred from the claim text.