Patents by Inventor Sauri Gudlavalleti
Sauri Gudlavalleti 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).
-
Patent number: 8270062Abstract: In certain embodiments, a device is provided including a substrate and a plurality of supports over the substrate. The device may further include a mechanical layer having a movable portion and a stationary portion. The stationary portion may disposed over the supports. In certain embodiments, the device further includes a reflective surface positioned over the substrate and mechanically coupled to the movable portion. The device of certain embodiments further includes at least one movable stop element displaced from and mechanically coupled to the movable portion. In certain embodiments, the at least a portion of the stop element may be positioned over the stationary portion.Type: GrantFiled: September 17, 2009Date of Patent: September 18, 2012Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Manish Kothari, Sauri Gudlavalleti, Stephen Zee
-
Publication number: 20120169743Abstract: An interferometric modulating device is provided with a thermal expansion balancing layer on a side of the movable flexible layer opposite the movable reflector such that when temperature changes the distance between the movable reflector and the optical stack does not change significantly, thereby leading to stable color. Additionally, an interferometric modulating device is provided with a stiffening layer between the movable flexible layer and the movable reflector and at least one hollow void exists on the surface where the movable reflector and the stiffening layer contact each other so that the movable reflector is more rigid to bending, thereby reducing the temperature sensitivity of the movable reflector.Type: ApplicationFiled: March 13, 2012Publication date: July 5, 2012Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Sauri Gudlavalleti, Clarence Chui
-
Patent number: 8164821Abstract: An interferometric modulating device is provided with a thermal expansion balancing layer on a side of the movable flexible layer opposite the movable reflector such that when temperature changes the distance between the movable reflector and the optical stack does not change significantly, thereby leading to stable color. Additionally, an interferometric modulating device is provided with a stiffening layer between the movable flexible layer and the movable reflector and at least one hollow void exists on the surface where the movable reflector and the stiffening layer contact each other so that the movable reflector is more rigid to bending, thereby reducing the temperature sensitivity of the movable reflector.Type: GrantFiled: February 22, 2008Date of Patent: April 24, 2012Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Sauri Gudlavalleti, Clarence Chui
-
Publication number: 20120069209Abstract: A lensless camera may include an array of MEMS-based light-modulating devices. A camera controller may control the MEMS-based light-modulating devices to transmit visible light through, or substantially prevent the transmission of visible light through, predetermined areas of the array. The array may be controlled in response to input from a user and/or in response to the location of a detected subject. The viewing direction of a lensless camera having such an array can be rapidly changed by changing the transmittance of different regions of the array.Type: ApplicationFiled: September 22, 2010Publication date: March 22, 2012Inventors: Sauri Gudlavalleti, Manish Kothari
-
Publication number: 20120019713Abstract: Some embodiments comprise at least one array that includes microelectromechanical systems (“MEMS”)-based light-modulating devices. Elements of the array(s) may be configured to absorb and/or reflect light when in a first configuration and to transmit light when in a second position. Such an array may be controlled to function as a camera aperture and/or as a camera shutter. For example, a controller may cause the array to function as a shutter by causing the MEMS devices to open for a predetermined period of time. The predetermined period of time may be based, at least in part, on input received from a user, the intensity of ambient light, the intensity of a flash, the size of the camera aperture, etc. Some embodiments provide a variable aperture device that does not add significant thickness or cost to a camera module. Such embodiments may enable a camera to function well in both bright and dark light, to control depth of field, etc.Type: ApplicationFiled: July 26, 2010Publication date: January 26, 2012Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Sauri Gudlavalleti, Manish Kothari
-
Publication number: 20120014683Abstract: A camera flash system may include a light source and an array that includes MEMS-based light-modulating devices disposed in front the light source. The camera flash system may control the array to transmit light through, or substantially prevent the transmission of light through, predetermined areas of the array. In some embodiments, the array may be controlled in response to input from a user, in response to detected ambient light conditions and/or in response to the proximity of a detected subject or other detected features. For example, the camera flash system may control the array to substantially prevent the transmission of light through an area of the array that is between the light source and the eyes of a detected subject.Type: ApplicationFiled: July 15, 2010Publication date: January 19, 2012Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Sauri Gudlavalleti, Manish Kothari
-
Publication number: 20110273701Abstract: A test structure allows one or more deposited thin film layers to be moved such that mechanical properties of the thin film layer or layers may be determined. Methods for characterizing the mechanical properties of the deposited thin film layer include the determination of a transition voltage of the movable thin film layer in the test structure, or the mechanical stiffness of the movable layer, and/or a determination of residual stress within the movable layer. Methods may also include the determination of creep rate or fatigue, as well as the variance in mechanical properties of the movable layer at various temperatures. Test structures used with the testing methods may include structures which interferometrically modulate incident light, enabling electrical or optical determination of the state of the test structures.Type: ApplicationFiled: September 28, 2007Publication date: November 10, 2011Applicant: QUAL COMM MEMS Technologies, Inc.Inventors: Manish Kothari, Sauri Gudlavalleti, Satyadev Rajesh Patel
-
Patent number: 7989118Abstract: A method of manufacturing a fuel cell stack is provided. The method provides forming an inspectable preassembly of multiple fuel cell assemblies that may be termed a pseudostack. Each fuel cell in the pseudostack has permanent electrical interconnections and sealing connections on only one of the two electrodes, namely an anode layer or a cathode layer. For example, an anode interconnect may be firmly attached to the anode layer by means of a bonding agent and a sealing agent used to seal passages on the anode layer of the fuel cell. Alternatively, seals and permanent electrical connections may be made on the cathode layer of the fuel cell, and not on the anode layer.Type: GrantFiled: June 1, 2010Date of Patent: August 2, 2011Assignee: General Electric CompanyInventors: Richard Scott Bourgeois, Richard Louis Hart, Sauri Gudlavalleti, Shu Ching Quek, Andrew Philip Shapiro, Rong Fan, Dacong Weng, Xiwang Qi
-
Publication number: 20110063712Abstract: In certain embodiments, a device is provided including a substrate and a plurality of supports over the substrate. The device may further include a mechanical layer having a movable portion and a stationary portion. The stationary portion may disposed over the supports. In certain embodiments, the device further includes a reflective surface positioned over the substrate and mechanically coupled to the movable portion. The device of certain embodiments further includes at least one movable stop element displaced from and mechanically coupled to the movable portion. In certain embodiments, the at least a portion of the stop element may be positioned over the stationary portion.Type: ApplicationFiled: September 17, 2009Publication date: March 17, 2011Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Manish Kothari, Sauri Gudlavalleti, Stephen Zee
-
Patent number: 7863079Abstract: 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: GrantFiled: February 5, 2008Date of Patent: January 4, 2011Assignee: Qualcomm MEMS Technologies, Inc.Inventors: Manish Kothari, Clarence Chui, Sauri Gudlavalleti
-
Patent number: 7803493Abstract: A fuel cell assembly comprises a separating structure configured for separating a first reactant and a second reactant wherein the separating structure has an opening therein. The fuel cell assembly further comprises a fuel cell comprising a first electrode, a second electrode, and an electrolyte interposed between the first and second electrodes, and a passage configured to introduce the second reactant to the second electrode. The electrolyte is bonded to the separating structure with the first electrode being situated within the opening, and the second electrode being situated within the passage.Type: GrantFiled: September 29, 2004Date of Patent: September 28, 2010Assignee: General Electric CompanyInventors: Richard Scott Bourgeois, Sauri Gudlavalleti, Shu Ching Quek, Wayne Charles Hasz, James Daniel Powers
-
Publication number: 20100239940Abstract: A method of manufacturing a fuel cell stack is provided. The method provides forming an inspectable preassembly of multiple fuel cell assemblies that may be termed a pseudostack. Each fuel cell in the pseudostack has permanent electrical interconnections and sealing connections on only one of the two electrodes, namely an anode layer or a cathode layer. For example, an anode interconnect may be firmly attached to the anode layer by means of a bonding agent and a sealing agent used to seal passages on the anode layer of the fuel cell. Alternatively, seals and permanent electrical connections may be made on the cathode layer of the fuel cell, and not on the anode layer.Type: ApplicationFiled: June 1, 2010Publication date: September 23, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Richard Scott Bourgeois, Richard Louis Hart, Sauri Gudlavalleti, Shu Ching Quek, Andrew Philip Shapiro, Rong Fan, Dacong Weng, Xiwang Qi
-
Patent number: 7632595Abstract: A fuel cell assembly comprising at least one metallic component, at least one ceramic component and a structure disposed between the metallic component and the ceramic component. The structure is configured to have a lower stiffness compared to at least one of the metallic component and the ceramic component, to accommodate a difference in strain between the metallic component and the ceramic component of the fuel cell assembly.Type: GrantFiled: April 5, 2004Date of Patent: December 15, 2009Assignee: General Electric CompanyInventors: Richard Scott Bourgeois, Sauri Gudlavalleti
-
Publication number: 20090291340Abstract: A fuel cell assembly comprising at least one metallic component, at least one ceramic component and a structure disposed between the metallic component and the ceramic component. The structure is configured to have a lower stiffness compared to at least one of the metallic component and the ceramic component, to accommodate a difference in strain between the metallic component and the ceramic component of the fuel cell assembly.Type: ApplicationFiled: April 5, 2004Publication date: November 26, 2009Inventors: Richard Scott Bourgeois, Sauri Gudlavalleti
-
Publication number: 20090231666Abstract: An interferometric modulating device is provided with a thermal expansion balancing layer on a side of the movable flexible layer opposite the movable reflector such that when temperature changes the distance between the movable reflector and the optical stack does not change significantly, thereby leading to stable color. Additionally, an interferometric modulating device is provided with a stiffening layer between the movable flexible layer and the movable reflector and at least one hollow void exists on the surface where the movable reflector and the stiffening layer contact each other so that the movable reflector is more rigid to bending, thereby reducing the temperature sensitivity of the movable reflector.Type: ApplicationFiled: February 22, 2008Publication date: September 17, 2009Inventors: Sauri Gudlavalleti, Clarence Chui
-
Patent number: 7572432Abstract: Disclosed herein is a method comprising combusting a feed stream to form combustion products; and reforming the combustion products to produce a gaseous composition comprising hydrogen. Disclosed herein too is a method for producing hydrogen comprising introducing a feed stream comprising natural gas and air or oxygen into a cyclical compression chamber; compressing the feed stream in the cyclical compression chamber; combusting the feed stream in the cyclical compression chamber to produce combustion products; discharging the combustion products from the cyclical compression chamber into a reforming section; and reforming the combustion products with steam in the reforming section to produce a gaseous composition comprising hydrogen.Type: GrantFiled: April 13, 2004Date of Patent: August 11, 2009Assignee: General Electric CompanyInventors: Sauri Gudlavalleti, Michael Bowman, Chellappa Balan, Shailesh Singh Bhaisora, Andrei Colibaba-Evulet, Narayan Ramesh
-
Publication number: 20090195856Abstract: 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: ApplicationFiled: February 5, 2008Publication date: August 6, 2009Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Manish Kothari, Clarence Chui, Sauri Gudlavalleti
-
Publication number: 20090051369Abstract: A MEMS test device comprises a flexible beam spaced apart from an optical stack. The MEMS test device includes a reflective layer and a partially reflective layer, such that a change in the position of the MEMS test device can be observed without the use of an external interferometer. The flexible beam may be cantilevered or fixed at each end. The flexible beam may include a shoe suspended from the side of the beam facing the optical stack, to provide a fixed contact area. An array of MEMS test devices may be used to determine compliance, or to calculate adhesion forces.Type: ApplicationFiled: August 21, 2007Publication date: February 26, 2009Applicant: QUALCOMM IncorporatedInventors: Lior Kogut, Ming-Hau Tung, Sauri Gudlavalleti
-
Publication number: 20080085371Abstract: A thermal spray system is provided. The thermal spray system includes a spray assembly for applying a coating to a workpiece. The thermal spray system also includes a fixturing assembly couplable to the workpiece for positioning the workpiece relative to the thermal spray system, wherein the fixturing assembly permits the workpiece to distort during application of the coating to minimize residual strain buildup within the workpiece and reduce coating stresses.Type: ApplicationFiled: October 5, 2006Publication date: April 10, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Sauri Gudlavalleti, Larry Steven Rosenzweig, Shu Ching Quek, Chandra Sekher Yerramalli
-
Patent number: 7261064Abstract: A combustion engine system comprises a plurality of cylinders configured to combust a mixed fuel to produce an exhaust gas and at least one reforming cylinder configured to receive a first portion of a fuel and deliver a reformed hydrogen-containing gas. The hydrogen-containing gas is introduced into a second portion of the fuel to form the mixed fuel to reduce emission from the combustion engine system.Type: GrantFiled: October 1, 2004Date of Patent: August 28, 2007Assignee: General Electric CompanyInventors: Shailesh Singh Bhaisora, Michael John Bowman, Sauri Gudlavalleti