Patents by Inventor Anshu Pradhan
Anshu 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).
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Publication number: 20240142844Abstract: Controllers and control methods apply a drive voltage to bus bars of a thin film optically switchable device. The applied drive voltage is provided at a level that drives a transition over the entire surface of the optically switchable device but does not damage or degrade the device. This applied voltage produces an effective voltage at all locations on the face of the device that is within a bracketed range. The upper bound of this range is associated with a voltage safely below the level at which the device may experience damage or degradation impacting its performance in the short term or the long term. At the lower boundary of this range is an effective voltage at which the transition between optical states of the device occurs relatively rapidly. The level of voltage applied between the bus bars is significantly greater than the maximum value of the effective voltage within the bracketed range.Type: ApplicationFiled: January 11, 2024Publication date: May 2, 2024Inventors: Anshu A. Pradhan, Disha Mehtani, Gordon Jack
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Publication number: 20240118578Abstract: 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. In some cases, feedback may be used to monitor an optical transition. In these or other cases, a group of optically switchable devices may transition together over a particular duration to achieve approximately uniform tint states over time during the transition.Type: ApplicationFiled: October 19, 2023Publication date: April 11, 2024Inventors: Gordon Jack, Sridhar K. Kailasam, Stephen C. Brown, Anshu A. Pradhan
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Patent number: 11947232Abstract: 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: GrantFiled: March 8, 2018Date of Patent: April 2, 2024Assignee: View, Inc.Inventors: Sridhar Karthik Kailasam, Robin Friedman, Anshu A. Pradhan, Robert T. Rozbicki
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Patent number: 11934080Abstract: 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: GrantFiled: December 15, 2020Date of Patent: March 19, 2024Assignee: View, Inc.Inventors: Sridhar K. Kailasam, Dhairya Shrivastava, Zhiwei Cai, Robert T. Rozbicki, Dane Gillaspie, Todd Martin, Anshu A. Pradhan, Ronald M. Parker
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Publication number: 20240082949Abstract: Thin-film devices, for example electrochromic devices for windows, and methods of manufacturing are described. Particular focus is given to methods of patterning optical devices. Various edge deletion and isolation scribes are performed, for example, to ensure the optical device has appropriate isolation from any edge defects. Methods described herein apply to any thin-film device having one or more material layers sandwiched between two thin film electrical conductor layers. The described methods create novel optical device configurations.Type: ApplicationFiled: October 20, 2023Publication date: March 14, 2024Applicant: View, Inc.Inventors: Abhishek Anant Dixit, Todd William Martin, Anshu A. Pradhan, Fabian Strong, Robert T. Rozbicki
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Patent number: 11927867Abstract: Controllers and control methods apply a drive voltage to bus bars of a thin film optically switchable device. The applied drive voltage is provided at a level that drives a transition over the entire surface of the optically switchable device but does not damage or degrade the device. This applied voltage produces an effective voltage at all locations on the face of the device that is within a bracketed range. The upper bound of this range is associated with a voltage safely below the level at which the device may experience damage or degradation impacting its performance in the short term or the long term. At the lower boundary of this range is an effective voltage at which the transition between optical states of the device occurs relatively rapidly. The level of voltage applied between the bus bars is significantly greater than the maximum value of the effective voltage within the bracketed range.Type: GrantFiled: December 13, 2022Date of Patent: March 12, 2024Assignee: View, Inc.Inventors: Anshu A. Pradhan, Disha Mehtani, Gordon Jack
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Patent number: 11898233Abstract: 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, which are in direct contact with one another. 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. In addition to the improved electrochromic devices and methods for fabrication, integrated deposition systems for forming such improved devices are also disclosed.Type: GrantFiled: August 17, 2021Date of Patent: February 13, 2024Assignee: View, Inc.Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
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Patent number: 11891327Abstract: 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: GrantFiled: July 29, 2022Date of Patent: February 6, 2024Assignee: View, Inc.Inventors: Anshu A. Pradhan, Robert T. Rozbicki, Dane Thomas Gillaspie, Sridhar Karthik Kailasam
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Patent number: 11865632Abstract: Thin-film devices, for example electrochromic devices for windows, and methods of manufacturing are described. Particular focus is given to methods of patterning optical devices. Various edge deletion and isolation scribes are performed, for example, to ensure the optical device has appropriate isolation from any edge defects. Methods described herein apply to any thin-film device having one or more material layers sandwiched between two thin film electrical conductor layers. The described methods create novel optical device configurations.Type: GrantFiled: April 12, 2022Date of Patent: January 9, 2024Assignee: View, Inc.Inventors: Abhishek Anant Dixit, Todd William Martin, Anshu A. Pradhan, Fabian Strong, Robert T. Rozbicki
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Patent number: 11835834Abstract: 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. In some cases, feedback may be used to monitor an optical transition. In these or other cases, a group of optically switchable devices may transition together over a particular duration to achieve approximately uniform tint states over time during the transition.Type: GrantFiled: October 19, 2022Date of Patent: December 5, 2023Assignee: View, Inc.Inventors: Gordon Jack, Sridhar K. Kailasam, Stephen C. Brown, Anshu A. Pradhan
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Patent number: 11829045Abstract: 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. In some cases, feedback may be used to monitor an optical transition. In these or other cases, a group of optically switchable devices may transition together over a particular duration to achieve approximately uniform tint states over time during the transition.Type: GrantFiled: July 29, 2021Date of Patent: November 28, 2023Assignee: View, Inc.Inventors: Gordon Jack, Sridhar K. Kailasam, Stephen C. Brown, Anshu A. Pradhan
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Patent number: 11719992Abstract: 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: GrantFiled: October 14, 2021Date of Patent: August 8, 2023Assignee: View, Inc.Inventors: Stephen Clark Brown, Dhairya Shrivastava, David Walter Groechel, Anshu A. Pradhan, Gordon E. Jack, Disha Mehtani, Robert T. Rozbicki
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Patent number: 11698566Abstract: 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: GrantFiled: June 26, 2019Date of Patent: July 11, 2023Assignee: View, Inc.Inventors: Sridhar Karthik Kailasam, Dhairya Shrivastava, Zhiwei Cai, Robert T. Rozbicki, Dane Thomas Gillaspie, Todd William Martin, Anshu A. Pradhan, Ronald M. Parker
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Publication number: 20230205032Abstract: Various embodiments herein relate to electrochromic devices, methods of fabricating electrochromic devices, and apparatus for fabricating electrochromic 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: ApplicationFiled: March 6, 2023Publication date: June 29, 2023Inventors: Anshu A. Pradhan, Robert T. Rozbicki, Dane Gillaspie, Sridhar K. Kailasam
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Patent number: 11681197Abstract: 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: GrantFiled: March 2, 2021Date of Patent: June 20, 2023Assignee: View, Inc.Inventors: Dhairya Shrivastava, Anshu A. Pradhan, Stephen Clark Brown, David Walter Groechel, Robert T. Rozbicki
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Patent number: 11668990Abstract: 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: GrantFiled: August 14, 2020Date of Patent: June 6, 2023Assignee: View, Inc.Inventors: Robert T. Rozbicki, Sridhar Karthik Kailasam, Robin Friedman, Dane Thomas Gillaspie, Anshu A. Pradhan, Disha Mehtani
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Patent number: 11668991Abstract: The embodiments herein relate to methods for controlling an optical transition in 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.Type: GrantFiled: January 29, 2021Date of Patent: June 6, 2023Assignee: View, Inc.Inventor: Anshu A. Pradhan
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Publication number: 20230161213Abstract: 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: ApplicationFiled: January 10, 2023Publication date: May 25, 2023Inventors: Gordon Jack, Sridhar K. Kailasam, Stephen C. Brown, Anshu A. Pradhan
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Patent number: 11654659Abstract: 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: GrantFiled: February 12, 2021Date of Patent: May 23, 2023Assignees: View, Inc., Corning IncorporatedInventors: Ronald M. Parker, Anshu A. Pradhan, Abhishek Anant Dixit, Douglas Dauson
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Publication number: 20230152655Abstract: Controllers and control methods apply a drive voltage to bus bars of a thin film optically switchable device. The applied drive voltage is provided at a level that drives a transition over the entire surface of the optically switchable device but does not damage or degrade the device. This applied voltage produces an effective voltage at all locations on the face of the device that is within a bracketed range. The upper bound of this range is associated with a voltage safely below the level at which the device may experience damage or degradation impacting its performance in the short term or the long term. At the lower boundary of this range is an effective voltage at which the transition between optical states of the device occurs relatively rapidly. The level of voltage applied between the bus bars is significantly greater than the maximum value of the effective voltage within the bracketed range.Type: ApplicationFiled: January 13, 2023Publication date: May 18, 2023Inventors: Anshu A. Pradhan, Disha Mehtani, Gordon Jack