Gang Mei Xu

US Patent:

5793458, Aug 11, 1998

Filed:

Dec 18, 1996

Appl. No.:

8/768502

Inventors:

John A. VanderPloeg - Highland MI
Gang Xu - Northville MI
Adiel Abileah - Farmington Hill MI

Assignee:

OIS Optical Imaging Systems, Inc. - Northville MI

International Classification:

G02F 11335

US Classification:

349118

Abstract:

A normally white twisted nematic liquid crystal display is provided for outputting improved viewing characteristics which are defined by high contrast ratios and reduced inversion. The display includes both positive and negative retardation films, the negative films being biaxial and defined by n. sub. x >n. sub. y >n. sub. z in certain embodiments where the "z" direction is substantially perpendicular to the film plane and the "x" and "y" directions are substantially parallel to the film plane. By providing the positive and biaxial negative retarders with specific retardation values and/or ratios, improved viewing characteristics are provided. According to other embodiments, a positive and a negative (uniaxial or biaxial) retarder may be provided on only one side of the liquid crystal layer.

US Patent:

6567143, May 20, 2003

Filed:

Apr 28, 1998

Appl. No.:

09/066827

Inventors:

John A. VanderPloeg - Highland MI
Gang Xu - Cupertino CA

Assignee:

Guardian Industries Corp. - Auburn Hills MI

International Classification:

G02F 11335

US Classification:

349120, 349118

Abstract:

A normally white twisted nematic (TN) liquid crystal display (LCD) outputs improved viewing characteristics which are defined by high contrast ratios and/or reduced inversion. The display includes a pair of negative tilted retarders located on opposite sides of the liquid crystal layer, each of the tilted retarders including a tilt or incline angle which varies throughout the thickness of the layer. Additionally, one or two negative uniaxial or biaxial retarders are provided. As a result of the particular orientations, alignments, and retardation values described in the different embodiments herein, the display exhibits improved contrast and reduced inversion, often in the same viewing areas. Contrast ratio in the positive vertical viewing zone is especially improved.

US Patent:

6578536, Jun 17, 2003

Filed:

Dec 18, 2001

Appl. No.:

10/025579

Inventors:

William Peter Donohue - Milford MI
Alfred Edmund Lynn - Troy MI
Gang Xu - Westlake OH
Vijay Garg - Canton MI

Assignee:

Visteon Global Technologies, Inc. - Dearborn MI

International Classification:

F01L 134

US Classification:

123 9018, 123 9015, 123 9011, 123 9012, 25112901, 25112916

Abstract:

The present invention provides an actuator assembly for operating a cylinder valve of an internal combustion engine. The actuator assembly achieves fast response times by utilizing a solenoid actuator that contains an armature element formed of a powder metal. A valve system that utilizes two of the actuator assemblies in conjunction with a cylinder valve is also provided.

US Patent:

6631633, Oct 14, 2003

Filed:

Nov 2, 2000

Appl. No.:

09/704885

Inventors:

Vijay K. Garg - Canton MI
Zheng Lou - Plymouth MI
Alfred E. Lynn - Troy MI
David Jorgensen - Chelsea MI
Gang Xu - Canton MI

Assignee:

Visteon Global Technologies, Inc. - Dearborn MI

International Classification:

G01L 2700

US Classification:

73 157, 137 1, 25112916

Abstract:

A variable force solenoid valve assembly generally includes a coil, magnetic pole, armature, and one or more variable size air gaps that are disposed within the solenoid. The solenoid may be calibrated by first energizing the solenoid coils and determining a corresponding desired hydraulic pressure, measuring the actual hydraulic pressure, and adjusting the magnetic flux until the desired output pressure is achieved.

US Patent:

6801213, Oct 5, 2004

Filed:

Feb 21, 2001

Appl. No.:

09/792041

Inventors:

Neil Bergstrom - Palo Alto CA
Dick Huston - Boulder Creek CA
Gang Xu - Cupertino CA

Assignee:

Brillian Corporation - Tempe AZ

International Classification:

G09G 502

US Classification:

345596, 345591, 345600, 345593, 345597, 345 88, 345102

Abstract:

A system and method are provided for driving a digital display adapted to depict a first number of bits per color field during each frame. In use, a second number of bits is displayed which is greater than the first number of bits. This is accomplished by alternating the display of the bits between frames. To this end, additional bits of color are displayed without increasing the number of bits per color field during each frame.

US Patent:

7369292, May 6, 2008

Filed:

May 3, 2006

Appl. No.:

11/416920

Inventors:

Gang Xu - Cupertino CA, US
Evgeni Gousev - Saratoga CA, US

Assignee:

QUALCOMM MEMS Technologies, Inc. - San Diego CA

International Classification:

G02F 1/03
G02B 26/00

US Classification:

359245, 359290

Abstract:

A microelectromechanical (MEMS) device is presented which comprises a metallized semiconductor. The metallized semiconductor can be used for conductor applications because of its low resistivity, and for transistor applications because of its semiconductor properties. In addition, the metallized semiconductor can be tuned to have optical properties which allow it to be useful for optical MEMS devices.

US Patent:

7403180, Jul 22, 2008

Filed:

Jan 29, 2007

Appl. No.:

11/699542

Inventors:

Louis D. Silverstein - Scottsdale AZ, US
Alan G. Lewis - Sunnyvale CA, US
Jennifer Lee Gille - Menlo Park CA, US
Gang Xu - Cupertino CA, US

Assignee:

Qualcomm Mems Technologies, Inc. - San Diego IL

International Classification:

G09G 3/34
G02B 26/00

US Classification:

345 84, 345 55, 345 85, 359290, 359291, 385146

Abstract:

A display device including a plurality of optical modulators and a plurality of filter elements on a reflective side of the plurality of optical modulators is provided. The plurality of optical modulators includes a first set of optical modulators and a second set of optical modulators. Each optical modulator of the plurality of optical modulators is configured to be selectively switched among at least a first state, a second state, and a third state. Each state has a different spectral reflectance. The plurality of filter elements includes a first set of filter elements corresponding to the first set of optical modulators and a second set of filter elements corresponding to the second set of optical modulators. The first set of filter elements has a different spectral transmittance than the second set of filter elements.

US Patent:

7619822, Nov 17, 2009

Filed:

Jan 30, 2007

Appl. No.:

11/669074

Inventors:

Russell Wayne Gruhike - Santa Clara CA, US
Mark Mienko - San Jose CA, US
Gang Xu - Cupertino CA, US
Ion Bita - San Jose CA, US

Assignee:

QUALCOMM MEMS Technologies, Inc. - San Diego CA

International Classification:

G02B 5/02
F21V 7/04
G02B 26/00

US Classification:

359599, 362600, 362603, 362609, 362610, 359291

Abstract:

Various embodiments of the invention include an interferometric optical modulator comprising a substrate layer and a light direction layer. Such an interferometric modulator may be integrated with a diffuser layer in a display device in a way that physically integrates the diffuser layer into the light direction layer in a way where the diff-user layer does not interact with light propagating within the light direction layer. As a result, most of the light propagating within the light direction layer does not penetrate into the diffuser which would inhibit performance of the display. In some embodiments, the interface between the diffuser layer and the light direction layer has a lower index of refraction than the light direction layer and the transparent substrate so that total internal reflection occurs at the interface.