Reald Inc.

University of Colorado

Brillian Corporation

Three-five Systems, Inc.

Colorado Microdisplay, Inc.

Zight Corporation

Light Field Lab, Inc.

Boulder Nonlinear Systems, Inc.

University Technology Corporation

Other

Meadowlark Optics, Inc.

Realid Inc.

Compound Photonics U.S. Corporation

Douglas J McKnight

Michael Geraint Robinson

Miller H Schuck

Gary Dean Sharp

Tobias W Walker

Lowell F Bohn, Jr

Kevin R Curtis

Kristina M Johnson

Douglas J Gorny

Wilhelm Taylor

Mrityunjay Kumar

Jonathan Sean Karafin

Terry Norton

Mary Tilton

Paul L Roselle

Jay Ahling

Kam Wan

Russell M Hudyma

Kevin J Ilcisin

Kevin Schehrer

Steven A Serati

Jon Karafin

Mark DiLullo

Miller H Schuck, Iii

William Cassarly

Miller Schuck

Karl Armagost

William S Barnhill

Peter T Kazlas

Jonathan Biles

Ido Bar-Tana

Christopher Hoy

Janelle Shane

Jay R Ahling

This disclosure describes systems, methods, and apparatus for an optical system including pairs of LCPGs and polarization controllers (e.g., waveplates) that can be controlled to effect multiple simultaneous focal planes, or to simultaneously image multiple focal planes.

Simultaneous focusing of an optical system to multiple focal planes using liquid crystal polarization lenses

Systems, devices, and methods disclosed herein may generate captured views and a plurality of intermediate views within a pixel disparity range, T, the plurality of intermediate views being extrapolated from the captured views.

Multiscopic image capture system

A spatial light modulator having an active and a peripheral region, wherein coherent light impinges on both regions, but due to a higher spatial frequency of pixels within the peripheral region, and due to biasing the peripheral region pixels to maximize dispersion of reflected light therefrom, a majority of light reflected from the peripheral region is directed outside of a three-dimensional target window. A spatial frequency of the pixels in the active region is selected such that maximum dispersion of reflected light from the active region is incident within the three-dimensional target window. In this way, incident light that does not reflect from the active region need not be absorbed, or blocked, but instead can be reflected, but still fails to interfere with the target window.

Reflective spatial light modulator with high spatial frequency border

A direct view display provides a light modulating panel and a backlight including first and second sets of spectral emitters. Several modes of operation may be provided including an advanced 2D mode, and an enhanced color gamut mode employing simultaneous illumination of the first and second set of spectral emitters. Another embodiment may be an optical structure for a multi-functional LCD display with wide color gamut and high stereo contrast. The optical structure may also be used to produce more saturated colors for a wider display color gamut and also may be used to produce a brighter backlight structure through light recycling of the wider bandwidth light back into the optical structure.

Multi-primary backlight for multi-functional active-matrix liquid crystal displays

Systems, methods, and apparatus are disclosed for attenuating an incident polarized light beam using a plurality of Liquid Crystal Polarization Gratings ('LCPGs') and one or more switchable liquid crystal layers. When four LCPGs are used, a spacing between first and second LCPGs can be equal to a spacing between third and fourth LCPGs. Pi and FCL cells can also be used in place of more traditional LC switches. Switching of the LC switch can be imparted via an AC bias.

Compact liquid crystal beam steering devices including multiple polarization gratings

Optical systems having at least one polarization beam splitter (PBS) are operable to receive randomly-polarized light bundles from a projector lens. The PBS is further operable to direct light bundles having a state of polarization (SOP) along a light path and operable to direct other light bundles having a different SOP along different light paths. The light paths have optical path lengths which may differ. Each light path produces an image having a distortion which may differ from the distortion of an image produced by a different light path. A compensation in a light path is operable to convert a non-compensated distortion of an image into a compensated distortion that more closely matches the distortion of images in other light paths.

Distortion matching polarization conversion systems and methods thereof

The present disclosure includes systems and methods for solving speckle problems by exciting the screen with a more complex vibration spectrum. A range of frequencies provides, in effect, a collection of overlapping patterns of high and low displacement, so that all regions of the screen have enough motion to reduce visible speckle. As previously discussed acceptable speckle may be approximately 15% contrast or less, preferably approximately 5% contrast or less at approximately 15 feet from the screen.

System and method for vibrating screens to reduce speckle

Liquid crystal devices may include electrode segments that are spaced apart and have a gap therebetween. A bridge layer may be disposed in the gap and configured to have a resistance that is operable provide a substantially equipotential region proximate to the gap portion while still allowing the electrode segments to be substantially isolated electrically. The disclosed liquid crystal devices may have reduced visual artifacts and may be configured to be a liquid crystal display, a polarization control panel, or a switch having liquid crystal cells.

Liquid crystal devices having reduced electrode-gap visibility

The present disclosure provides discussion of screen vibration to reduce speckle in display applications and/or projection screens. Electrical transducers or reactors may be used with a screen to reduce or remove speckle in projection screens and/or display applications. Electrical transducers may not be directly mounted to a screen, thus eliminating many mechanical failure modes associated with a vibrating transducer as well as resulting in a much quieter operation. By design, the reactors or transducers may actually contact the screen, and can take up less than one square inch of screen surface each, than previous designs, which may be outside of the active viewing area and within 12 inches of the screen border, preferably less than approximately 1 inch from screen edge. The reactors are magnets, though any ferrous material can be made to work with certain operating conditions.

Screen vibration for reducing speckle

Display devices with high dynamic ranges approaching the limitations of the human eye are discussed herein. High dynamic range projections systems may be 2D or 3D and devices may or may not be implemented with polarization preserving optics for high efficiency. In one embodiment, 2D HDR projection systems may compensate the modulator for varying transmission and contrast versus field of view. In another embodiment, 3D HDR projection systems may include a global or pixelated/segmented modulator. The global or pixelated/segmented modulator may be included in a stereoscopic polarization switch or in a polarization-preserving stereoscopic projection system. Additionally, a combination of global/global or pixelated/pixelated, or global/pixelated modulators may be used.

High dynamic range, high contrast projection systems

Growing community of inventors

Boulder, CO, United States of America

Douglas J McKnight