Patents by Inventor Taisup Hwang
Taisup Hwang 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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Patent number: 9389423Abstract: An apparatus for providing adjustable transparency to an optical element of a head wearable display includes an electro-chromic film disposed across the optical element to adjust a transparency of the optical element to ambient light and a transparency controller coupled to control the electro-chromic film with a drive signal to decrease the transparency of the optical element as the brightness of the ambient light increases. The transparency controller includes a scaling circuit coupled to receive a power signal from a power source and coupled to output the driving signal to the electro-chromic film to control the transparency of the optical element. The scaling circuit scales the power signal to generate the driving signal. The transparency controller further includes a control circuit coupled to the scaling circuit to control the scaling applied by the scaling circuit.Type: GrantFiled: March 11, 2014Date of Patent: July 12, 2016Assignee: Google Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Anurag Gupta, Simon R. Prakash
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Publication number: 20160181575Abstract: The disclosed embodiments provide a battery cell. The battery cell includes a set of layers including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, which contains a first layer of polyether ether ketone (PEEK).Type: ApplicationFiled: April 29, 2013Publication date: June 23, 2016Applicant: Apple Inc.Inventors: Richard M. Mank, Taisup Hwang
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Patent number: 9331358Abstract: The disclosed embodiments provide a battery cell which includes a set of jelly rolls enclosed in a pouch. Each jelly roll includes layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a first set of conductive tabs and a second set of conductive tabs. Each of the first set of conductive tabs is coupled to the cathode of one of the jelly rolls, and each of the second set of conductive tabs is coupled to the anode of one of the jelly rolls. At least one of the first set and one of the second set of conductive tabs extend through seals in the pouch to provide terminals for the battery cell.Type: GrantFiled: January 26, 2010Date of Patent: May 3, 2016Assignee: Apple Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Patent number: 9276287Abstract: The disclosed embodiments provide a battery cell. The battery cell includes a set of layers forming a non-rectangular shape, wherein the set of layers comprises a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The layers are enclosed in a flexible pouch, and the first and second conductive tabs are extended through seals in the pouch to provide terminals for the battery cell. Furthermore, the non-rectangular shape is created by removing material from one or more of the layers.Type: GrantFiled: October 28, 2011Date of Patent: March 1, 2016Assignee: Apple Inc.Inventors: Ramesh C. Bhardwaj, John Raff, Stephen R. McClure, Erik L. Wang, Taisup Hwang
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Publication number: 20150303416Abstract: The disclosed embodiments provide a battery pack for use with a portable electronic device. The battery pack includes a first set of cells with different capacities electrically coupled in a parallel configuration. Cells within the first set of cells may also have different thicknesses and/or dimensions. The first set of cells is arranged within the battery pack to facilitate efficient use of space within a portable electronic device. For example, the first set of cells may be arranged to accommodate components in the portable electronic device.Type: ApplicationFiled: April 21, 2015Publication date: October 22, 2015Applicant: APPLE INC.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Publication number: 20150260991Abstract: An apparatus for providing adjustable transparency to an optical element of a head wearable display includes an electro-chromic film disposed across the optical element to adjust a transparency of the optical element to ambient light and a transparency controller coupled to control the electro-chromic film with a drive signal to decrease the transparency of the optical element as the brightness of the ambient light increases. The transparency controller includes a scaling circuit coupled to receive a power signal from a power source and coupled to output the driving signal to the electro-chromic film to control the transparency of the optical element. The scaling circuit scales the power signal to generate the driving signal. The transparency controller further includes a control circuit coupled to the scaling circuit to control the scaling applied by the scaling circuit.Type: ApplicationFiled: March 11, 2014Publication date: September 17, 2015Applicant: GOOGLE INC.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Anurag Gupta, Simon R. Prakash
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Patent number: 9040187Abstract: The disclosed embodiments provide a battery pack for use with a portable electronic device. The battery pack includes a first set of cells with different capacities electrically coupled in a parallel configuration. Cells within the first set of cells may also have different thicknesses and/or dimensions. The first set of cells is arranged within the battery pack to facilitate efficient use of space within a portable electronic device. For example, the first set of cells may be arranged to accommodate components in the portable electronic device.Type: GrantFiled: July 13, 2010Date of Patent: May 26, 2015Assignee: APPLE, INC.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Publication number: 20140322575Abstract: The disclosed embodiments provide a battery cell. The battery cell includes a set of layers which are wound together to form a jelly roll, including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, wherein the pouch is flexible. To increase a current flow in the battery cell, a first set of conductive tabs is coupled to a cathode substrate of the cathode, and a second set of conductive tabs is coupled to an anode substrate of the anode.Type: ApplicationFiled: April 24, 2013Publication date: October 30, 2014Applicant: Apple Inc.Inventors: Taisup Hwang, Richard M. Mank, Bookeun Oh
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Publication number: 20140322590Abstract: The disclosed embodiments provide a battery cell. The battery cell includes a set of layers including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, which contains a first layer of polyether ether ketone (PEEK).Type: ApplicationFiled: April 29, 2013Publication date: October 30, 2014Applicant: Apple Inc.Inventors: Richard M. Mank, Taisup Hwang
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Patent number: 8846230Abstract: The disclosed embodiments relate to the design of a battery cell with multiple thicknesses. This battery cell includes a jelly roll enclosed in a pouch, wherein the jelly roll includes layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. The jelly roll also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The jelly roll is enclosed in a flexible pouch, and the first and second conductive tabs are extended through seals in the pouch to provide terminals for the battery cell. Furthermore, the battery cell has two or more thicknesses, wherein the different thicknesses are created by removing material from one or more of the layers before winding the layers together.Type: GrantFiled: October 18, 2013Date of Patent: September 30, 2014Assignee: Apple Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Patent number: 8816648Abstract: Some embodiments of the present invention provide a system that charges a battery. During operation, the system obtains a set of charging currents {I1, . . . , In} and a set of charging voltages {V1, . . . , Vn}. Next, the system repeats constant-current and constant-voltage charging operations, starting with i=1 and incrementing i with every repetition, until a termination condition is reached. These constant-current and constant-voltage charging operations involve charging the battery using a constant current Ii until a cell voltage of the battery reaches Vi, and then charging the battery using a constant voltage Vi until a charging current is less than or equal to Ii+1.Type: GrantFiled: August 17, 2009Date of Patent: August 26, 2014Assignee: Apple Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Publication number: 20140109397Abstract: The disclosed embodiments relate to the manufacture of a battery cell. The battery cell includes a set of layers including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, wherein the pouch is flexible. The layers may be wound to create a jelly roll and/or stacked prior to sealing the layers in the flexible pouch. A side fold is also formed in the pouch by producing a target temperature in the range of 55° C. to 75° C. at a side seal of the pouch prior to folding the side seal against the battery cell.Type: ApplicationFiled: January 29, 2013Publication date: April 24, 2014Applicant: APPLE INC.Inventors: Sheba Devan, Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Publication number: 20140106194Abstract: The disclosed embodiments provide a battery cell which includes a set of jelly rolls enclosed in a pouch. Each jelly roll includes layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a first set of conductive tabs and a second set of conductive tabs. Each of the first set of conductive tabs is coupled to the cathode of one of the jelly rolls, and each of the second set of conductive tabs is coupled to the anode of one of the jelly rolls. At least one of the first set and one of the second set of conductive tabs extend through seals in the pouch to provide terminals for the battery cell.Type: ApplicationFiled: December 19, 2013Publication date: April 17, 2014Applicant: Apple Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Publication number: 20140106190Abstract: The disclosed embodiments relate to a battery cell which includes a weakness for relieving pressure. This battery cell includes a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator and an anode with an active coating. The jelly roll also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The jelly roll is enclosed in a flexible pouch, wherein the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell. This pouch includes a weakness which yields when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.Type: ApplicationFiled: December 16, 2013Publication date: April 17, 2014Applicant: Apple Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Patent number: 8679201Abstract: The disclosed embodiments relate to the manufacture of a battery cell. The battery cell includes a set of layers including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, wherein the pouch is flexible. The layers may be wound to create a jelly roll prior to sealing the layers in the flexible pouch. The stiffness of the battery cell may be increased by applying a pressure of at least 0.13 kilogram-force (kgf) per square millimeter and a temperature of about 85° C. to the layers.Type: GrantFiled: October 13, 2011Date of Patent: March 25, 2014Assignee: Apple Inc.Inventors: Ramesh C. Bhardwaj, Sheba Devan, Taisup Hwang
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Publication number: 20140050955Abstract: The described embodiments relate to the design of a package for a battery cell. This battery cell includes a jelly roll with layers that are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. Moreover, a pouch encloses the battery cell. Furthermore, a mechanical support structure, within the pouch, surrounds a portion of an outer surface of the jelly roll.Type: ApplicationFiled: September 26, 2012Publication date: February 20, 2014Applicant: APPLE INC.Inventors: Richard M. Mank, Taisup Hwang, Bookeun Oh
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Publication number: 20140045023Abstract: The disclosed embodiments relate to the design of a battery cell with multiple thicknesses. This battery cell includes a jelly roll enclosed in a pouch, wherein the jelly roll includes layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. The jelly roll also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The jelly roll is enclosed in a flexible pouch, and the first and second conductive tabs are extended through seals in the pouch to provide terminals for the battery cell. Furthermore, the battery cell has two or more thicknesses, wherein the different thicknesses are created by removing material from one or more of the layers before winding the layers together.Type: ApplicationFiled: October 18, 2013Publication date: February 13, 2014Applicant: Apple Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Publication number: 20140019790Abstract: A method and apparatus are described for monitoring a battery in an electronic device. In the described embodiments, a battery is charged to a predetermined state of charge. The float current for the battery is then determined, and an alert is selectively generated based on the float current.Type: ApplicationFiled: July 10, 2012Publication date: January 16, 2014Applicant: APPLE INC.Inventors: Ramesh C. Bhardwaj, Taisup Hwang
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Patent number: 8617734Abstract: The disclosed embodiments relate to a battery cell which includes a weakness for relieving pressure. This battery cell includes a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator and an anode with an active coating. The jelly roll also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The jelly roll is enclosed in a flexible pouch, wherein the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell. This pouch includes a weakness which yields when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.Type: GrantFiled: December 20, 2012Date of Patent: December 31, 2013Assignee: Apple Inc.Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Publication number: 20130337303Abstract: The disclosed embodiments relate to the manufacture of a battery cell. The battery cell includes a set of layers including a cathode and an anode. The cathode includes a cathode substrate with a thickness in the range of 8-10 microns and a cathode active material. The anode includes an anode substrate with a thickness in the range of 4-6 microns and an anode active material. The cathode active material is coated on the cathode substrate at a rate of 2 mm/min to 3 mm/min, and the anode active material is coated on the anode substrate at a rate of 2 mm/min to 3.8 mm/min. Such substrate thicknesses and coating speeds may increase the energy density of the battery cell over that of a conventional battery cell with thicker cathode and anode substrates while avoiding manufacturing defects associated with the use of thinner substrates in battery cells.Type: ApplicationFiled: June 18, 2012Publication date: December 19, 2013Applicant: APPLE INC.Inventors: Ramesh C. Bhardwaj, Taisup Hwang