Reald Inc.

Colorlink, Inc.

Jianmin Chen

Michael Geraint Robinson

Gary Dean Sharp

Jonathan R Birge

David A Coleman

Kristina M Johnson

John Korah

Disclosed embodiments include stereoscopic systems having at least one compensator operable to reduce the sensitivity of polarization control over incidence angle of image source optics and analyzer optics. In an exemplary embodiment, the disclosed compensator is operable to compensate polarization changes induced by optics at either or both the image source subsystem and the analyzer subsystem, in which the polarization changes would be operable to cause leakage at the analyzer subsystem if uncompensated. As such, the disclosed compensators and compensation techniques are operable to reduce leakage at the analyzer subsystem even if the disclosed compensator may be located at the analyzer subsystem.

Polarization compensated stereoscopic projection

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.

Stereoscopic flat panel display with updated blanking intervals

Generally, this disclosure concerns the angle sensitivity of polarization switch elements and the resulting impact of the ray direction on performance. More specifically, apparatus and techniques for compensating the angular sensitivity of liquid crystal (LC) polarization switches are described that enhance the performance of polarization switches. For example, a polarization switch is disclosed that transforms linearly polarized light of an initial polarization orientation that includes a first and second liquid crystal cell with a compensator located between the LC cells. The compensator layer is operable to enhance the field of view through the polarization switch. Such compensation techniques are particularly useful for short-throw projection environments.

Field-of-view compensated polarization switch for short-throw 3D projection

Stereoscopic flat panel display with scrolling backlight and synchronized liquid crystal display update

Polarization modulation with in-plane switching of liquid crystals (LCs) may be used in active retarder stereoscopic display systems where viewers wear passive eyewear to see isolated left and right eye images. Embodiments of the present disclosure may include nematic LC or fast switching ferroelectric liquid crystal (FLC), depending on the desired performance.

In-plane switched active retarder for stereoscopic display systems

Polarization compensated stereoscopic systems

Stereoscopic flat panel display with a continuously lit backlight

Segmented polarization control panel

A super-twist nematic (STN) liquid crystal (LC) light shutter with improved contrast performance, lower power requirements and enhanced off-axis performance. Compensator components may be disposed in front of and, in some cases, behind the liquid crystal cell. In some embodiments, a STN LC cell with a twist angle of 270 degrees may be used. In other embodiments, a STN LC cell with a twist angle ranging between just greater than 270 degrees and 285 degrees may be used. Also disclosed is a system incorporating the various disclosed STN LC shutters.

System and eyewear for viewing stereoscopic imagery

Described are various compensators for compensating for in-plate and out-of-plane retardances of LC panels in their dark states.

Dark-state compensators for LC panels

Described are tilted compensators for compensating for in-plate and out-of-plane retardances of LC panels in their dark states, including a single tilted biaxial retarder or compound retarder comprising more than one biaxial film, which are effective to compensate both for nonideal polarization effects of LC panels and other optical components in optical projection systems. Also described are tilted compensators for deflecting away from a projection system optical path unwanted reflected light.

Contrast enhancement for liquid crystal based projection systems

Described is an optical compensator device that can maintain a high degree of performance in the demanding environment of projection display. A mounting process involves using a sealant between optically clear glass or ceramic substrate and low elastic polymer retarder film. The sealant may mitigate or prevent the degradation of the retarder film by acting as an oxygen barrier that seals the substrate and increases the lifetime of the device in high luminance.

High durability and high performance polarization optics using a low-elasticity organic layer

LC panel compensators

A sequential color system with reduced or eliminated global temporal notching losses may be implemented with a buffered display panel. Fast global blanking and/or inter-field images may be used to reduce or eliminate the global temporal notching losses. When consecutive states of a pixel are 'on,' an inter-field image may be displayed by maintaining the pixel in an 'on' state instead of turning the pixel &#x201c;off&#x201d; and then turning the pixel &#x201c;on.&#x201d; This improves the color brightness and saturation. The display may be implemented with a color wheel or with a color switch.

Growing community of inventors

Superior, CO, United States of America

Jianmin Chen