David Coleman
Engineers at Mccella Ct, Westminster, CO

7898734, Mar 1, 2011

Jan 28, 2009

12/361532

David A. Coleman - Louisville CO, US
Gary D. Sharp - Boulder CO, US

RealD Inc. - Beverly Hills CA

G03B 21/56, G03B 21/60

359449, 359459

Polarization preserving front projection screens and diffusers provide optimum polarization preservation for stereoscopic 3D viewing, as well as improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed screens direct light from a projector toward viewers within a diffusion locus, while maintaining optimum gain characteristics. More specifically, light incident on a region of the front projection screen from a predetermined projection direction is reflected by an engineered surface to a predetermined diffusion locus after undergoing substantially single reflections. The engineered surface, comprised of generating kernels, is used to optimally diffuse illumination light into a range of viewing angles, within the diffusion locus, with suitable gain profile, while optimally preserving polarization for 3D applications. Such a screen, when combined with matched polarization analyzing eyewear, provides extremely low cross-talk from any observation point.

8194315, Jun 5, 2012

Dec 22, 2010

12/976986

Gary D. Sharp - Boulder CO, US
David A. Coleman - Louisville CO, US
Joel Petersen - Valley Village CA, US
Christopher Rich - Rancho Pales Verdes CA, US
Raymond Jacob Lewandowski - San Diego CA, US

ReaID Inc. - Beverly Hills CA
Wavefront Technology, Inc. - Paramount CA

G03B 21/60

359452, 427180, 427194, 359443, 359518, 359538

Polarization preserving projection screens provide optimum polarization preservation for 3D viewing. The projection screens additionally provide improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed method for providing a projection screen comprises embossing at least a first side of a first substrate to produce an optically functional material and then cutting the optically functional material into pieces to produce a plurality of engineered particles. The plurality of engineered particles may then be deposited on a second substrate to produce a substantially homogeneous optical appearance of the projection screen.

8526106, Sep 3, 2013

Mar 9, 2012

13/416693

David A. Coleman - Louisville CO, US
Gary D. Sharp - Boulder CO, US

RealD Inc. - Beverly Hills CA

G03B 21/56, G03B 21/60

359443, 359449, 359451, 428 57, 428 58, 428 61, 428212

Methods to substantially reduce or eliminate optical non-uniformity across an interface may also substantially improve the strength and ease of seam manufacturing, including joining substrates. The methods may include managing optical non-uniformities at least by broadening a region over which a change in optical loss may occur and/or by maintaining a substantially constant average optical loss across an interface. The methods may also include forming a seam that substantially reduces the appearance of optical non-uniformities at the seam, which may include maintaining approximately constant average loss in the vicinity of the seam by substantially controlling reflectivity in the vicinity of the seam, in which substantially controlling reflectivity in the vicinity of the seam may include employing a backer treated to minimize optical reflectivity over a range of angles.

2012008, Apr 5, 2012

Sep 30, 2011

13/250638

David A. Coleman - Louisville CO, US
Gary D. Sharp - Boulder CO, US

REALD INC. - Beverly Hills CA

G03B 21/60, B05D 5/06

359459, 4271633

A method for providing a projection screen for receiving stereoscopic images may include providing a substrate with a contoured, reflective surface, wherein light reflected from the substrate substantially may undergo no more than a single reflection and may also include coating a first layer on the substrate with a contoured, reflective surface. The first layer may substantially maintain the same optical properties as the substrate without the first layer. The first layer may be substantially conformal to the surface of the substrate and also may be a self assembled monolayer coating which may include at least a functional group that is hydrophobic.

2014006, Mar 6, 2014

Sep 6, 2013

14/020654

Kevin R. Curtis - Boulder CO, US
David A. Coleman - Louisville CO, US

RealD Inc. - Beverly Hills CA

G03B 21/56

359446, 359443

A stiffening strip at selected edges of a screen may enable the use and mounting of a high-elastic modulus substrate screen material. Such screen materials may be engineered to provide polarization-preserving characteristics, and be applied to or part of the high-elastic modulus substrate. Furthermore, the stiffening strip may enable the use of screen vibration techniques to reduce speckle in display applications that use projection screens, particularly those display applications using illumination sources prone to speckle such as laser-based projection. The screen vibration may be provided by a vibrating device attached to the stiffening strip.

2013010, May 2, 2013

Dec 14, 2012

13/714874

RealD Inc. - Beverly Hills CA, US
David A. Coleman - Louisville CO, US

REALD INC. - Beverly Hills CA

G02B 27/26, G02B 5/30

359465, 1563066, 1562755, 35948907

Stereoscopic eyewear with compound curvature may be employed to view three dimensional content. The manufacture of such eyewear may be achieved by thermoforming a first material and by thermoforming a second material. The first and second materials may be in roll stock form prior to thermoforming, and the first layer may be polarizer material, while the second layer may be retarder material. Each of the first and second materials may be thermoformed by employing optimized thermoforming conditions for each of the two materials. Additionally, the two thermoforming lines may be timed so that the curved shapes of the first material in roll stock form may be substantially synchronized with the curved shapes of the second material in roll stock form, which may allow the curved shapes of each of the first and second materials in roll stock form may be joined together.

2007024, Oct 18, 2007

Jun 19, 2007

11/765174

Jianmin Chen - Superior CO, US
David Coleman - Louisville CO, US

COLORLINK, INC. - Boulder CO

G03B 21/14

353020000

An LCoS projection system provides a form birefringent polarization beam splitter (PBS) having an output modulator port, a light modulating panel, and a biaxial compensation element between the output modulator port and the light modulating panel. In one embodiment, the biaxial compensation element is a biaxial quarter wave plate. In another embodiment, the biaxial compensation element includes a uniaxial quarter wave plate and a biaxial trim retarder. The biaxial compensation element provides improved contrast performance.

8169699, May 1, 2012

Dec 22, 2010

12/977026

Joel Petersen - Valley Village CA, US
Christopher Rich - Rancho Pales Verdes CA, US
Raymond Jacob Lewandowski - San Diego CA, US
Gary D. Sharp - Boulder CO, US
David Coleman - Louisville CO, US

RealD Inc. - Beverly Hills CA

G03B 21/56

359452, 353 20, 359443, 359454, 359458, 359459

Polarization preserving projection screens provide optimum polarization preservation for 3D viewing. The projection screens additionally provide improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed method for providing a projection screen comprises stripping an optically functional material from a carrier substrate, thus creating engineered particles from the optically functional material. The engineered particles may then be deposited on a second substrate to create a substantially homogeneous optical appearance of the projection screen.

2013005, Mar 7, 2013

Feb 24, 2012

13/405199

Gary D. Sharp - Boulder CO, US
David A. Coleman - Louisville CO, US

REALD INC. - Beverly Hills CA

G02C 7/10, B23P 11/00

351 44, 29 20

Disclosed embodiments relate to eyewear configured to reduce stray light. An exemplary embodiment of the eyewear accounts for various design factors, including the cross sectional profile of the rim, the micro topography of the rim surface, the reflectivity, the theatre or room geometry, proximity of the eye to the lens, lens size, and the screen gain. An exemplary eyewear includes lenses connected to the rim sections of a frame, and a path may be defined through a maximum height of the outer flange portion of a rim section and a maximum height of the inner flange portion of the rim section. The path may be inclined at an angle relative to an angle α relative to a longitudinal axis defined by the lenses.

2011018, Aug 4, 2011

Feb 1, 2011

13/019275

Gary D. Sharp - Boulder CO, US
David A. Coleman - Louisville CO, US

REALD INC. - Beverly Hills CA

G02B 27/26, G02C 7/02, G02B 5/30

359465, 156 99, 35948907

Stereoscopic eyewear with compound curvature may be employed to view three dimensional content. The manufacture of such eyewear may be achieved by thermoforming a first material and by thermoforming a second material. The first and second materials may be in roll stock form prior to thermoforming, and the first layer may be polarizer material, while the second layer may be retarder material. Each of the first and second materials may be thermoformed by employing optimized thermoforming conditions for each of the two materials. Additionally, the two thermoforming lines may be timed so that the curved shapes of the first material in roll stock form may be substantially synchronized with the curved shapes of the second material in roll stock form, which may allow the curved shapes of each of the first and second materials in roll stock form may be joined together.