Patents by Inventor Anshu A. Pradhan

Anshu A. Pradhan 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).

  • Controlling transitions in optically switchable devices
    Patent number: 10401702
    Abstract: Aspects of this disclosure concern controllers and control methods for applying a drive voltage to bus bars of optically switchable devices such as electrochromic devices. Such devices are often provided on windows such as architectural glass. In certain embodiments, the applied drive voltage is controlled in a manner that efficiently drives an optical transition over the entire surface of the electrochromic device. The drive voltage is controlled to account for differences in effective voltage experienced in regions between the bus bars and regions proximate the bus bars. Regions near the bus bars experience the highest effective voltage.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: September 3, 2019
    Assignee: View, Inc.
    Inventors: Gordon Jack, Sridhar K. Kailasam, Stephen C. Brown, Anshu A. Pradhan
  • ELECTROMAGNETIC-SHIELDING ELECTROCHROMIC WINDOWS
    Publication number: 20190219881
    Abstract: Electromagnetic-shielding, electrochromic windows comprising a first multi-layer conductor, an electrochromic stack disposed on the first multi-layer conductor, and a second multi-layer conductor, wherein the one or more multi-layer conductors with an electromagnetic shielding stack configured to be activated to block electromagnetic communication signals through the windows.
    Type: Application
    Filed: August 18, 2017
    Publication date: July 18, 2019
    Inventors: Dhairya Shrivastava, Stephen Clark Brown, Robert T. Rozbicki, Anshu A. Pradhan, Sridhar Karthik Kailasam, Robin Friedman, Gordon E. Jack, Dane Thomas Gillaspie
  • CALIBRATION OF ELECTRICAL PARAMETERS IN OPTICALLY SWITCHABLE WINDOWS
    Publication number: 20190221148
    Abstract: The embodiments herein relate to methods for controlling an optical transition and the ending tint state of an optically switchable device, and optically switchable devices configured to perform such methods. In various embodiments, non-optical (e.g., electrical) feedback is used to help control an optical transition. The feedback may be used for a number of different purposes. In many implementations, the feedback is used to control an ongoing optical transition. In some embodiments a transfer function is used calibrate optical drive parameters to control the tinting state of optically switching devices.
    Type: Application
    Filed: March 20, 2019
    Publication date: July 18, 2019
    Applicant: View, Inc.
    Inventors: Anshu A. Pradhan, Abhishek Anant Dixit
  • Counter electrode for electrochromic devices
    Patent number: 10345671
    Abstract: The embodiments herein relate to electrochromic stacks, electrochromic devices, and methods and apparatus for making such stacks and devices. In various embodiments, an anodically coloring layer in an electrochromic stack or device is fabricated to include nickel-tungsten-tin-oxide (NiWSnO). This material is particularly beneficial in that it is very transparent in its clear state.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: July 9, 2019
    Assignee: View, Inc.
    Inventors: Dane Gillaspie, Anshu A. Pradhan, Sridhar K. Kailasam
  • CONNECTORS FOR SMART WINDOWS
    Publication number: 20190196292
    Abstract: This disclosure provides connectors for smart windows. A smart window may incorporate an optically switchable pane. In one aspect, a window unit includes an insulated glass unit including an optically switchable pane. A wire assembly may be attached to the edge of the insulated glass unit and may include wires in electrical communication with electrodes of the optically switchable pane. A floating connector may be attached to a distal end of the wire assembly. The floating connector may include a flange and a nose, with two holes in the flange for affixing the floating connector to a first frame. The nose may include a terminal face that present two exposed contacts of opposite polarity. Pre-wired spacers improve fabrication efficiency and seal integrity of insulated glass units. Electrical connection systems include those embedded in the secondary seal of the insulated glass unit.
    Type: Application
    Filed: November 20, 2018
    Publication date: June 27, 2019
    Inventors: Stephen C. Brown, Dhairya Shrivastava, David Walter Groechel, Anshu A. Pradhan, Gordon Jack, Disha Mehtani, Robert T. Rozbicki
  • FABRICATION OF LOW DEFECTIVITY ELECTROCHROMIC DEVICES
    Publication number: 20190187531
    Abstract: Prior electrochromic devices frequently suffer from high levels of defectivity. The defects may be manifest as pin holes or spots where the electrochromic transition is impaired. This is unacceptable for many applications such as electrochromic architectural glass. Improved electrochromic devices with low defectivity can be fabricated by depositing certain layered components of the electrochromic device in a single integrated deposition system. While these layers are being deposited and/or treated on a substrate, for example a glass window, the substrate never leaves a controlled ambient environment, for example a low pressure controlled atmosphere having very low levels of particles. These layers may be deposited using physical vapor deposition. In certain embodiments, the device includes a counter electrode having an anodically coloring electrochromic material in combination with an additive.
    Type: Application
    Filed: February 25, 2019
    Publication date: June 20, 2019
    Inventors: Anshu A. Pradhan, Robert T. Rozbicki, Dane Gillaspie, Sridhar K. Kailasam
  • ELECTROCHROMIC DEVICES
    Publication number: 20190171078
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically-insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically-insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Application
    Filed: November 29, 2018
    Publication date: June 6, 2019
    Inventors: Anshu A. Pradhan, Robert T. Rozbicki
  • MULTI-ZONE EC WINDOWS
    Publication number: 20190169926
    Abstract: Thin-film devices, for example, multi-zone electrochromic windows, and methods of manufacturing are described. In certain cases, a multi-zone electrochromic window comprises a monolithic EC device on a transparent substrate and two or more tinting zones, wherein the tinting zones are configured for independent operation.
    Type: Application
    Filed: November 14, 2018
    Publication date: June 6, 2019
    Inventors: Dhairya Shrivastava, Robin Friedman, Vinod Khosla, Rao Mulpuri, Anshu A. Pradhan
  • MITIGATING DEFECTS IN AN ELECTROCHROMIC DEVICE UNDER A BUS BAR
    Publication number: 20190171076
    Abstract: Methods are provided for fabricating electrochromic devices that mitigate formation of short circuits under a top bus bar without predetermining where top bus bars will be applied on the device. Devices fabricated using such methods may be deactivated under the top bus bar, or may include active material under the top bus bar. Methods of fabricating devices with active material under a top bus bar include depositing a modified top bus bar, fabricating self-healing layers in the electrochromic device, and modifying a top transparent conductive layer of the device prior to applying bus bars.
    Type: Application
    Filed: January 16, 2019
    Publication date: June 6, 2019
    Inventors: Sridhar Karthik Kailasam, Dhairya Shrivastava, Zhiwei Cai, Robert T. Rozbicki, Dane Thomas Gillaspie, Todd William Martin, Anshu A. Pradhan, Ronald M. Parker
  • Narrow pre-deposition laser deletion
    Patent number: 10295880
    Abstract: Certain aspects pertain to methods of fabricating an optical device on a substantially transparent substrate that include a pre-deposition operation that removes a width of lower conductor layer at a distance from the outer edge of the substrate to form a pad at the outer edge. The pad and any deposited layers of the optical device may be removed in a post edge deletion operation.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: May 21, 2019
    Assignee: View, Inc.
    Inventors: Abhishek Anant Dixit, Todd William Martin, Anshu A. Pradhan
  • MITIGATING DEFECTS IN AN ELECTROCHROMIC DEVICE UNDER A BUS BAR
    Publication number: 20190146295
    Abstract: Methods are provided for fabricating electrochromic devices that mitigate formation of short circuits under a top bus bar without predetermining where top bus bars will be applied on the device. Devices fabricated using such methods may be deactivated under the top bus bar, or may include active material under the top bus bar. Methods of fabricating devices with active material under a top bus bar include depositing a modified top bus bar, fabricating self-healing layers in the electrochromic device, and modifying a top transparent conductive layer of the device prior to applying bus bars.
    Type: Application
    Filed: June 14, 2017
    Publication date: May 16, 2019
    Inventors: Ronald M. Parker, Anshu A. Pradhan, Abhishek Anant Dixit, Douglas Dauson
  • Defect-mitigation layers in electrochromic devices
    Patent number: 10288969
    Abstract: Electrochromic devices and methods may employ the addition of a defect-mitigating insulating layer which prevents electronically conducting layers and/or electrochromically active layers from contacting layers of the opposite polarity and creating a short circuit in regions where defects form. In some embodiments, an encapsulating layer is provided to encapsulate particles and prevent them from ejecting from the device stack and risking a short circuit when subsequent layers are deposited. The insulating layer may have an electronic resistivity of between about 1 and 108 Ohm-cm. In some embodiments, the insulating layer contains one or more of the following metal oxides: aluminum oxide, zinc oxide, tin oxide, silicon aluminum oxide, cerium oxide, tungsten oxide, nickel tungsten oxide, and oxidized indium tin oxide. Carbides, nitrides, oxynitrides, and oxycarbides may also be used.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: May 14, 2019
    Assignee: View, Inc.
    Inventors: Sridhar K. Kailasam, Robin Friedman, Dane Gillaspie, Anshu A. Pradhan, Robert Rozbicki, Disha Mehtani
  • Onboard controller for multistate windows
    Patent number: 10268098
    Abstract: Onboard EC window controllers are described. The controllers are configured in close proximity to the EC window, for example, within the IGU. The controller may be part of a window assembly, which includes an IGU having one or more EC panes, and thus does not have to be matched with the EC window, and installed, in the field. The window controllers described herein have a number of advantages because they are matched to the IGU containing one or more EC devices and their proximity to the EC panes of the window overcomes a number of problems associated with conventional controller configurations.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: April 23, 2019
    Assignee: View, Inc.
    Inventors: Dhairya Shrivastava, Anshu A. Pradhan, Stephen C. Brown, David Walter Groechel, Robert T. Rozbicki
  • COUNTER ELECTRODE MATERIAL FOR ELECTROCHROMIC DEVICES
    Publication number: 20190113819
    Abstract: Various embodiments herein relate to electrochromic devices, methods of fabricating electrochromic 116 devices, and apparatus for fabricating electrochromic 100 devices. In a number of cases, the electrochromic device may be fabricated to include a particular counter electrode material. The counter electrode material may include a base anodically coloring material. The counter electrode material may further include one or more halogens. The counter electrode material may also include one or more additives.
    Type: Application
    Filed: March 24, 2017
    Publication date: April 18, 2019
    Inventors: Anshu A. Pradhan, Robert T. Rozbicki, Dane Gillaspie, Sridhar K. Kailasam
  • Fabrication of low defectivity electrochromic devices
    Patent number: 10261381
    Abstract: Prior electrochromic devices frequently suffer from high levels of defectivity. The defects may be manifest as pin holes or spots where the electrochromic transition is impaired. This is unacceptable for many applications such as electrochromic architectural glass. Improved electrochromic devices with low defectivity can be fabricated by depositing certain layered components of the electrochromic device in a single integrated deposition system. While these layers are being deposited and/or treated on a substrate, for example a glass window, the substrate never leaves a controlled ambient environment, for example a low pressure controlled atmosphere having very low levels of particles. These layers may be deposited using physical vapor deposition. In certain embodiments, the device includes a counter electrode having an anodically coloring electrochromic material in combination with an additive.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: April 16, 2019
    Assignee: View, Inc.
    Inventors: Anshu A. Pradhan, Robert T. Rozbicki, Dane Gillaspie, Sridhar K. Kailasam
  • FABRICATION OF ELECTROCHROMIC DEVICES
    Publication number: 20190107764
    Abstract: Electrochromic devices and methods may employ the addition of a defect-mitigating insulating layer which prevents electronically conducting layers and/or electrochromically active layers from contacting layers of the opposite polarity and creating a short circuit in regions where defects form. In some embodiments, an encapsulating layer is provided to encapsulate particles and prevent them from ejecting from the device stack and risking a short circuit when subsequent layers are deposited. The insulating layer may have an electronic resistivity of between about 1 and 108 Ohm-cm. In some embodiments, the insulating layer contains one or more of the following metal oxides: aluminum oxide, zinc oxide, tin oxide, silicon aluminum oxide, cerium oxide, tungsten oxide, nickel tungsten oxide, and oxidized indium tin oxide. Carbides, nitrides, oxynitrides, and oxycarbides may also be used.
    Type: Application
    Filed: December 4, 2018
    Publication date: April 11, 2019
    Inventors: Sridhar K. Kailasam, Robin Friedman, Dane Gillaspie, Anshu A. Pradhan, Robert Rozbicki, Disha Mehtani
  • COUNTER ELECTRODE FOR ELECTROCHROMIC DEVICES
    Publication number: 20190107763
    Abstract: The embodiments herein relate to electrochromic stacks, electrochromic devices, and methods and apparatus for making such stacks and devices. In various embodiments, an anodically coloring layer in an electrochromic stack or device is fabricated to include nickel-tungsten-tin-oxide (NiWSnO). This material is particularly beneficial in that it is very transparent in its clear state.
    Type: Application
    Filed: November 29, 2018
    Publication date: April 11, 2019
    Inventors: Dane Gillaspie, Anshu A. Pradhan, Sridhar K. Kailasam
  • Fabrication of low defectivity electrochromic devices
    Patent number: 10254615
    Abstract: Prior electrochromic devices frequently suffer from high levels of defectivity. The defects may be manifest as pin holes or spots where the electrochromic transition is impaired. This is unacceptable for many applications such as electrochromic architectural glass. Improved electrochromic devices with low defectivity can be fabricated by depositing certain layered components of the electrochromic device in a single integrated deposition system. While these layers are being deposited and/or treated on a substrate, for example a glass window, the substrate never leaves a controlled ambient environment, for example a low pressure controlled atmosphere having very low levels of particles. These layers may be deposited using physical vapor deposition.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: April 9, 2019
    Assignee: View, Inc.
    Inventors: Sridhar Karthik Kailasam, Robin Friedman, Anshu A. Pradhan, Robert T. Rozbicki
  • NARROW PRE-DEPOSITION LASER DELETION
    Publication number: 20190086756
    Abstract: Certain aspects pertain to methods of fabricating an optical device on a substantially transparent substrate that include a pre-deposition operation that removes a width of lower conductor layer at a distance from the outer edge of the substrate to form a pad at the outer edge. The pad and any deposited layers of the optical device may be removed in a post edge deletion operation.
    Type: Application
    Filed: November 19, 2018
    Publication date: March 21, 2019
    Inventors: Abhishek Anant Dixit, Todd William Martin, Anshu A. Pradhan
  • LITHIUM SPUTTER TARGETS
    Publication number: 20190032195
    Abstract: Described are methods of fabricating lithium sputter targets, lithium sputter targets, associated handling apparatus, and sputter methods including lithium targets. Various embodiments address adhesion of the lithium metal target to a support structure, avoiding and/or removing passivating coatings formed on the lithium target, uniformity of the lithium target as well as efficient cooling of lithium during sputtering. Target configurations used to compensate for non-uniformities in sputter plasma are described. Modular format lithium tiles and methods of fabrication are described. Rotary lithium sputter targets are also described.
    Type: Application
    Filed: October 2, 2018
    Publication date: January 31, 2019
    Inventors: Disha Mehtani, Sridhar Karthik Kailasam, Trevor Frank, Todd William Martin, Jason Satern, Que Anh Song Nguyen, Dhairya Shrivastava, Martin John Neumann, Anshu A. Pradhan, Robert T. Rozbicki