Patents by Inventor Clarence Chui

Clarence Chui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20110096056
    Abstract: Embodiments of exemplary MEMS interferometric modulators are arranged at intersections of rows and columns of electrodes. In certain embodiments, the column electrode has a lower electrical resistance than the row electrode. A driving circuit applies a potential difference of a first polarity across electrodes during a first phase and then quickly transition to applying a bias voltage having a polarity opposite to the first polarity during a second phase. In certain embodiments, an absolute value of the difference between the voltages applied to the row electrode is less than an absolute value of the difference between the voltages applied to the column electrode during the first and second phases.
    Type: Application
    Filed: January 5, 2011
    Publication date: April 28, 2011
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Manish Kothari, Marc Mignard, Mithran C. Mathew, Jeffrey B. Sampsell
  • Publication number: 20110095973
    Abstract: An iterferometric modulator array is integrated with collapsible cavity MEMS electrical switches. The electrical switches may have similar physical geometry as the display elements. The switches may form row or column select functions for the display.
    Type: Application
    Filed: December 6, 2010
    Publication date: April 28, 2011
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventor: Clarence Chui
  • Patent number: 7928940
    Abstract: Embodiments of exemplary MEMS interferometric modulators are arranged at intersections of rows and columns of electrodes. In certain embodiments, the column electrode has a lower electrical resistance than the row electrode. A driving circuit applies a potential difference of a first polarity across electrodes during a first phase and then quickly transition to applying a bias voltage having a polarity opposite to the first polarity during a second phase. In certain embodiments, an absolute value of the difference between the voltages applied to the row electrode is less than an absolute value of the difference between the voltages applied to the column electrode during the first and second phases.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: April 19, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Manish Kothari, Marc Mignard, Mithran C. Mathew, Jeffrey B. Sampsell
  • Patent number: 7920136
    Abstract: Methods of writing display data to MEMS display elements are configured to minimize charge buildup and differential aging. Simultaneous to writing rows of image data, a pre-write operation is performed on a next row. The pre-write operation writes either image data or the inverse of the image data to the next row. In some embodiments, the selection between writing image data and writing inverse image data is performed in a random or pseudo-random manner.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: April 5, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Richard A. Stewart, Clarence Chui, Robert S. Hastings
  • Publication number: 20110075247
    Abstract: A displaying apparatus that includes a plurality of electromechanical system elements arranged in rows. The electromechanical system elements of each of the rows are further arranged in subrows. The subrows of each row are electrically connected. Certain of the electromechanical system elements have a hysteresis stability window that is nested with another hysteresis stability window of certain others of the electromechanical system elements. A method of manufacturing a displaying apparatus that includes forming a plurality of electromechanical system elements arranged in rows. The electromechanical system elements of each of the rows are further arranged in subrows. The subrows of each row are electrically connected. Certain of the electromechanical system elements have a hysteresis stability window that is nested with another hysteresis stability window of certain others of the electromechanical system elements.
    Type: Application
    Filed: December 7, 2010
    Publication date: March 31, 2011
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Mithran C. Mathew, Marc Mignard
  • Patent number: 7911677
    Abstract: A MEMS device is electrically actuated with a voltage placed across a first electrode and a moveable material. The device may be maintained in an actuated state by latch electrodes that are separate from the first electrode.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: March 22, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Clarence Chui
  • Patent number: 7906353
    Abstract: Embodiments of the present disclosure include a method of fabricating interferometric devices using lift-off processing techniques. Use of lift-off processing in the fabrication of various layers of interferometric modulators, such as an optical stack or a flex layer, advantageously avoids individualized chemistries associated with the plurality of materials associated with each layer thereof. Moreover, use of lift-off processing allows much greater selection in both materials and facilities available for fabrication of interferometric modulators.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: March 15, 2011
    Assignee: Qualcomm Mems Technologies, Inc.
    Inventors: Clarence Chui, Ming-Hau Tung
  • Publication number: 20110053304
    Abstract: A package is made of a transparent substrate having an interferometric modulator and a back plate. A non-hermetic seal joins the back plate to the substrate to form a package, and a desiccant resides inside the package. A method of packaging an interferometric modulator includes providing a transparent substrate and manufacturing an interferometric modulator array on a backside of the substrate. A back plate includes a curved portion relative to the substrate. The curved portion is substantially throughout the back plate. The back plate is sealed to the backside of the substrate with a back seal in ambient conditions, thereby forming a package.
    Type: Application
    Filed: October 14, 2010
    Publication date: March 3, 2011
    Applicant: Qualcomm MEMS Technologies, Inc.
    Inventors: Lauren Palmateer, Brian J. Gally, William J. Cummings, Manish Kothari, Clarence Chui
  • Publication number: 20110044496
    Abstract: A multi-state light modulator comprises a first reflector. A first electrode is positioned at a distance from the first reflector. A second reflector is positioned between the first reflector and the first electrode. The second reflector is movable between an undriven position, a first driven position, and a second driven position, each having a corresponding distance from the first reflector. In one embodiment, the three positions correspond to reflecting white light, being non-reflective, and reflecting a selected color of light. Another embodiment is a method of making the light modulator. Another embodiment is a display including the light modulator.
    Type: Application
    Filed: November 5, 2010
    Publication date: February 24, 2011
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, William J. Cummings, Brian J. Gally
  • Patent number: 7889163
    Abstract: Embodiments of exemplary MEMS interferometric modulators are arranged at intersections of rows and columns of electrodes. In certain embodiments, the column electrode has a lower electrical resistance than the row electrode. A driving circuit applies a potential difference of a first polarity across electrodes during a first phase and then quickly transition to applying a bias voltage having a polarity opposite to the first polarity during a second phase. In certain embodiments, an absolute value of the difference between the voltages applied to the row electrode is less than an absolute value of the difference between the voltages applied to the column electrode during the first and second phases.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: February 15, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Manish Kothari, Marc Mignard, Mithran C. Mathew, Jeffrey B. Sampsell
  • Publication number: 20110032427
    Abstract: A system and method for processing video data are disclosed. In one aspect, a method includes generating halftone data for a first video frame and generating halftone data for a second video frame. The method further includes, to reduce at least one visual artifact, selectively copying the halftone data for the first video frame into the halftone data for the second video frame, the selective copying being based upon a comparison between a predetermined fixed threshold and the difference in the human visual system model-based perceptual error of the originally generated halftone data for the second video frame and the human visual system model-based perceptual error of the halftone data for the second video frame after the copying is done.
    Type: Application
    Filed: June 4, 2010
    Publication date: February 10, 2011
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventors: Hamood-Ur Rehman, Marc Mignard, Clarence Chui
  • Patent number: 7875485
    Abstract: Embodiments of MEMS devices comprise a conductive movable layer spaced apart from a conductive fixed layer by a gap, and supported by rigid support structures, or rivets, overlying depressions in the conductive movable layer, or by posts underlying depressions in the conductive movable layer. In certain embodiments, portions of the rivet structures extend through the movable layer and contact underlying layers. In other embodiments, the material used to form the rigid support structures may also be used to passivate otherwise exposed electrical leads in electrical connection with the MEMS devices, protecting the electrical leads from damage or other interference.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: January 25, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Teruo Sasagawa, SuryaPrakash Ganti, Mark W. Miles, Clarence Chui, Manish Kothari, Ming-Hau Tung
  • Patent number: 7864402
    Abstract: A displaying apparatus that includes a plurality of electromechanical system elements arranged in rows. The electromechanical system elements of each of the rows are further arranged in subrows. The subrows of each row are electrically connected. Certain of the electromechanical system elements have a hysteresis stability window that is nested with another hysteresis stability window of certain others of the electromechanical system elements. A method of manufacturing a displaying apparatus that includes forming a plurality of electromechanical system elements arranged in rows. The electromechanical system elements of each of the rows are further arranged in subrows. The subrows of each row are electrically connected. Certain of the electromechanical system elements have a hysteresis stability window that is nested with another hysteresis stability window of certain others of the electromechanical system elements.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: January 4, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Mithran C Mathew, Marc Mignard
  • Patent number: 7863079
    Abstract: Methods of fabricating an electromechanical systems device that minimize critical dimension (CD) loss in the device are described. The methods provide electromechanical systems devices with improved properties, including high reflectivity.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: January 4, 2011
    Assignee: Qualcomm MEMS Technologies, Inc.
    Inventors: Manish Kothari, Clarence Chui, Sauri Gudlavalleti
  • Patent number: 7864395
    Abstract: A method and system for fabricating a light guide is disclosed. The method and system comprise providing a light guide element which includes a plurality of scattering elements located therein and adjusting at least a portion of the scattering elements to maintain their optical scattering character. The present invention provides a system and method for fabricating a front light technology that is inexpensive and can compete on a cost basis with LCD backlight technologies while maintaining reasonable performance.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: January 4, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Clarence Chui
  • Patent number: 7859739
    Abstract: An interferometric modulator array is integrated with collapsible cavity MEMS electrical switches. The electrical switches may have similar physical geometry as the display elements. The switches may form row or column select functions for the display.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: December 28, 2010
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Clarence Chui
  • Publication number: 20100320555
    Abstract: In one embodiment, the invention provides a method for fabricating a microelectromechanical systems device. The method comprises fabricating a first layer comprising a film having a characteristic electromechanical response, and a characteristic optical response, wherein the characteristic optical response is desirable and the characteristic electromechanical response is undesirable; and modifying the characteristic electromechanical response of the first layer by at least reducing charge build up thereon during activation of the microelectromechanical systems device.
    Type: Application
    Filed: August 23, 2010
    Publication date: December 23, 2010
    Applicant: QUALCOMM MEMS Technolgies, Inc.
    Inventors: Mark W. Miles, John Batey, Clarence Chui, Manish Kothari, Ming-Hau Tung
  • Publication number: 20100321352
    Abstract: A display array which can reduce the row connections between the display and the driver circuit and methods of manufacturing and operating the same are disclosed. In one embodiment, a display device comprises an array of MEMS display elements and a plurality of voltage dividers coupled to the array and configured to provide row output voltages to drive the array, wherein each row is connected to at least two inputs joined by a voltage divider.
    Type: Application
    Filed: August 12, 2010
    Publication date: December 23, 2010
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Alan Lewis, Marc M. Mignard
  • Publication number: 20100315398
    Abstract: Methods and devices for applying bias potentials of opposite polarities to columns of electromechanical display elements are described herein. The bias potentials may be applied such that a column and an adjacent column receive bias potentials of opposite polarity. The bias potentials may be applied such that a polarity of bias voltages received by columns of a first set of the display elements is opposite a polarity of bias voltages received by columns of a second set of the display elements.
    Type: Application
    Filed: August 5, 2010
    Publication date: December 16, 2010
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Manish Kothari
  • Patent number: RE42119
    Abstract: One aspect of the invention provides a method for fabricating a microelectromechanical systems device. The method comprises fabricating an array of first elements, each first element conforming to a first geometry; fabricating at least one array of second elements, each second element conforming to a second geometry; wherein fabricating the arrays comprises selecting a defining aspect of each of the first and second geometries based on a defining characteristic of each of the first and second elements; and normalizing differences in an actuation voltage required to actuate each of the first and second elements, wherein the differences are as a result of the selected defining aspect, the defining characteristic of each of the elements being unchanged.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: February 8, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Mark W. Miles