Patents by Inventor Sean Xiao
Sean Xiao 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: 10156043Abstract: The present invention relates to a reusable water writing paper, as well as to its production process and an inkless printing device thereof. The reusable water writing paper is consisted of a substrate as structure-support material, a color-displaying component supported on the substrate, and an optional performance-enhancing additive, wherein the color-displaying component is an oxazoline-based hydrochromic dye, which can change color obviously to display characters and/or patterns after contacting with water, and revert to the initial color to disappear the displayed characters and/or patterns after the water is removed, thereby the water writing paper is reusable. The paper is not only suitable for the exercise of writing or drawing with a brush pen, but also can be used for daily writing with a pen. Furthermore, inkless printing also can be achieved by spraying water.Type: GrantFiled: September 3, 2014Date of Patent: December 18, 2018Assignee: Jilin UniversityInventors: Sean Xiao-An Zhang, Lan Sheng, Minjie Li
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Publication number: 20160168797Abstract: The present invention relates to a reusable water writing paper, as well as to its production process and an inkless printing device thereof The reusable water writing paper is consisted of a substrate as structure-support material, a color-displaying component supported on the substrate, and an optional performance-enhancing additive, wherein the color-displaying component is an oxazoline-based hydrochromic dye, which can change color obviously to display characters and/or patterns after contacting with water, and revert to the initial color to disappear the displayed characters and/or patterns after the water is removed, thereby the water writing paper is reusable. The paper is not only suitable for the exercise of writing or drawing with a brush pen, but also can be used for daily writing with a pen. Furthermore, inkless printing also can be achieved by spraying water.Type: ApplicationFiled: September 3, 2014Publication date: June 16, 2016Inventors: Sean Xiao-An Zhang, Lan Sheng, Minjie Li
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Patent number: 9143943Abstract: Mode sensitive networking is provided to allow mode specific communications using a mobile device. If a device has an established secured connection and an application is running in work mode, packets are routed through the secure connection. If the device has an established secured connection but an application is running in personal mode, packets are routed through an alternate connection. Secured connections may be established by using privileged applications. A device and associated applications may have access to different servers, sites, and destinations based on a current mode.Type: GrantFiled: November 29, 2011Date of Patent: September 22, 2015Assignee: Dell Products L.P.Inventors: Vadim Draluk, Francois Goldfain, Jan-Willem Maarse, Geng Chen, Sean Xiao
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Patent number: 9009856Abstract: Mechanisms are provided to allow particular parties and applications access to protected application programming interfaces (APIs) without the use of security domains. Trusted parties and applications may have access to protected APIs while unfrosted parties and applications may be restricted to a more limited set of APIs. Public keys associated with individual applications that are used to enforce licensing policies can be repurposed for use in a verification process to prevent unauthorized access to APIs. A credential storage manager can be used to maintain permission and certificate information. An application authorization manager may access credential storage and maintain trusted application information.Type: GrantFiled: December 16, 2011Date of Patent: April 14, 2015Assignee: Dell Products L.P.Inventors: Vadim Draluk, Francois Goldfain, Jan-Willem Maarse, Helen Bragg, Sean Xiao
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Patent number: 8620620Abstract: A method(s) of testing AN/ULQ-21 (Hydra) Circuit Card Assembly(ies) (CCAs), which involve providing software to perform automated tests on Hydra CCAs that make up the Hydra Countermeasures Set and employ commercial off the shelf equipment (such as signal generators, spectrum analyzer, Data Acquisition Device(s), oscillators, etc. as applicable depending on the test and CCA being evaluated).Type: GrantFiled: September 30, 2010Date of Patent: December 31, 2013Assignee: The United States of America as represented by the Secretary of the NavyInventors: Keith Ng Yuen, Alex Phi Bao Long Nguyen, David George Omoto, Jacob B. Oliver, Michael Anthony Antonio Pascual, Sean Xiao-Yun Hong
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Publication number: 20130160147Abstract: Mechanisms are provided to allow particular parties and applications access to protected application programming interfaces (APIs) without the use of security domains. Trusted parties and applications may have access to protected APIs while unfrosted parties and applications may be restricted to a more limited set of APIs. Public keys associated with individual applications that are used to enforce licensing policies can be repurposed for use in a verification process to prevent unauthorized access to APIs. A credential storage manager can be used to maintain permission and certificate information. An application authorization manager may access credential storage and maintain trusted application information.Type: ApplicationFiled: December 16, 2011Publication date: June 20, 2013Applicant: DELL Products L.P.Inventors: Vadim Draluk, Francois Goldfain, Jan-Willem Maarse, Helen Bragg, Sean Xiao
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Publication number: 20130138766Abstract: Mode sensitive networking is provided to allow mode specific communications using a mobile device. If a device has an established secured connection and an application is running in work mode, packets are routed through the secure connection. If the device has an established secured connection but an application is running in personal mode, packets are routed through an alternate connection. Secured connections may be established by using privileged applications. A device and associated applications may have access to different servers, sites, and destinations based on a current mode.Type: ApplicationFiled: November 29, 2011Publication date: May 30, 2013Applicant: DELL Products L.P.Inventors: Vadim Draluk, Francois Goldfain, Jan-Willem Maarse, Geng Chen, Sean Xiao
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Publication number: 20110269240Abstract: The present invention is drawn toward a chemical or biological sensor that can comprise a semi-conducting nanowire and a chemical or biological sensing molecule tethered to the semi-conducting nanowire through a spacer group including a hydrophilic reactive group. In one embodiment, the semi-conducting nanowire can be part of an array of like or similar semi-conducting nanowires. Electrical leads can provide an electrical current to the array, and a signal measurement apparatus can be electrically coupled to the array, and can be configured for detecting changes in the electrical current of the array.Type: ApplicationFiled: March 8, 2004Publication date: November 3, 2011Inventors: Zhang-Lin Zhou, Zhiyong Li, Sean Xiao-An Zhang
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Patent number: 8048377Abstract: The present invention is drawn toward a chemical or biological sensor that can comprise a semi-conducting nanowire and a chemical or biological sensing molecule tethered to the semi-conducting nanowire through a spacer group including a hydrophilic reactive group. In one embodiment, the semi-conducting nanowire can be part of an array of like or similar semi-conducting nanowires. Electrical leads can provide an electrical current to the array, and a signal measurement apparatus can be electrically coupled to the array, and can be configured for detecting changes in the electrical current of the array.Type: GrantFiled: March 8, 2004Date of Patent: November 1, 2011Assignee: Hewlett-Packard Development Company, L.P.Inventors: Zhang-Lin Zhou, Zhiyong Li, Sean Xiao-An Zhang
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Publication number: 20100276017Abstract: A microfluidic device (100) for controllably moving a material of interest (102) includes a holding cavity (108) configured to hold the material of interest (102) and at least one actuator (120) configured to induce an activation material (116) to expand or contract. Expansion of the activation material (116) decreases the size of the holding cavity (108) to cause the material of interest (102) to be released from the holding cavity (108) and contraction of the activation material (116) increases the size of the holding cavity (108) to cause the material of interest (102) to be received into the holding cavity (108). The at least one actuator (120) is operable at multiple levels between a zero induction level to a maximum induction level on the activation material (116) to thereby controllably expand or contract the holding cavity (108) to release or receive a specified volume of the material of interest (102).Type: ApplicationFiled: December 1, 2009Publication date: November 4, 2010Inventors: Sean Xiao-An Zhang, Patricia A. Beck, Janice H. Nickel
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Patent number: 7821229Abstract: A system and method for cell balancing with smart low-voltage control circuit. The cell balancing system comprises a plurality of battery cells, an external bypass path for each cell, an internal bypass path for each cell, an input terminal receiving an enable signal for each cell, an input terminal receiving a selection signal, and a cell balancing unit for generating a configuration signal to conduct the external bypass path or internal bypass path. The enable signal is configured to enable a bypass current of each cell, and the selection signal is configured to select the external bypass path or internal bypass path. The cell balancing unit is employed to receive signals from input terminals, and generate a configuration signal to control the conductance of external bypass paths or internal bypass paths.Type: GrantFiled: December 15, 2008Date of Patent: October 26, 2010Assignee: 02Micro International LimitedInventors: Wei Wang, Guoxing Li, Sean Xiao
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Patent number: 7780841Abstract: A sensor array for sensing at least one of chemical moieties and biological moieties is provided. The sensor array comprises a plurality of working electrodes electrically associated with a reference electrode, each working electrode in combination with the reference electrode forming a transducer. Each working electrode is provided with a coating of a sensing element comprised of an ionizable moiety and a functional group sensitive to one of the chemical and/or biological moieties.Type: GrantFiled: February 15, 2005Date of Patent: August 24, 2010Assignee: Hewlett-Packard Development Company. L.P.Inventors: Sean Xiao-An Zhang, Zhiyong Li, Zhang-Lin Zhou, William M. Tong, R. Stanley Williams, Yong Chen
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Patent number: 7701177Abstract: A battery pre-charging circuit includes a pre-charging path, a pre-charging switch and a low-voltage pre-charging circuit. The pre-charging path is coupled between a charger and a battery for providing a pre-charging current from the charger to the battery. The pre-charging switch is coupled to the pre-charging path for conducting along the pre-charging path. The low-voltage pre-charging circuit is coupled to the pre-charging switch for controlling the pre-charging switch. The low-voltage pre-charging circuit is configured to switch on the pre-charging switch when the battery voltage is below a first battery voltage level.Type: GrantFiled: December 21, 2006Date of Patent: April 20, 2010Assignee: O2Micro International LimitedInventors: Shiqiang Liu, Guoxing Li, Sean Xiao, Liusheng Liu
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Patent number: 7679324Abstract: A communication circuit is used for transmitting data between a plurality of devices which have non-common ground voltages. The communication circuit comprises a plurality of transmitting input nodes coupled to the devices, respectively, a transmitting current path, a plurality of receiving output nodes coupled to the devices, respectively, and a receiving current path. The transmitting current path is coupled to the transmitting input nodes. The current through the transmitting current path is varied according to the input signal of the transmitting input nodes. The receiving current path is coupled to the receiving output nodes. The current through the receiving current path is varied according to the current of the transmitting current path such that data is transmitted from the transmitting input nodes to the receiving output nodes.Type: GrantFiled: November 18, 2005Date of Patent: March 16, 2010Assignee: O2Micro International LimitedInventors: Sean Xiao, Oleksandr Kokorin
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Patent number: 7677720Abstract: Ceramic pigment-based, chemically-modified porous coatings can be used for enhancing image permanence of ink-jet image printing. Specifically, a porous coated media sheet, comprising a media substrate, having a porous coating coated thereon comprising a modified ceramic pigment including a fixer group and a stabilizer group, each covalently attached to the ceramic pigment is disclosed. Additionally, a method and system for preparing permanent ink-jet images is also provided.Type: GrantFiled: August 2, 2005Date of Patent: March 16, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Kent D. Vincent, Sivapackia Ganapathiappan, Sean Xiao-An Zhang, Palitha Wickramanayake
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Patent number: 7656145Abstract: A voltage generator is used for generating a voltage reference with high power supply rejection. One embodiment of the circuit includes a voltage regulator and a bandgap voltage circuit and an amplifier. The voltage regulator including an input node is coupled to an external power supply for generating a regulated voltage source. A bandgap voltage circuit includes a first and a second resistor and a first and a second transistor to generate a voltage difference between the base-to-emitter voltages of the first and the second transistors. The second resistor is coupled to the first resistor and the first transistor for generating the first predetermined voltage in response to the voltage difference. An amplifier circuit is coupled to the first transistor of the bandgap voltage circuit for receiving a first amplifying signal and generating an amplified signal so as to regulate the regulated voltage source.Type: GrantFiled: June 19, 2007Date of Patent: February 2, 2010Assignee: O2Micro International LimitedInventors: Sean Xiao, Tom Tang, Guoxing Li
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Patent number: 7642750Abstract: A circuit is used for controlling charging and discharging a battery. The circuit comprises a first MOSFET for controlling discharging the battery, and a second MOSFET coupled in series to the battery and the first MOSFET for controlling charging the battery. The first and second MOSFETs have body diodes respectively, and the first body diode of the first MOSFET and the second body diode of the second MOSFET are coupled in opposite directions. A load is coupled to the battery and a common node between the first and second MOSFETs such that power in the battery is delivered to said load when the first MOSFET is turned on. The circuit further comprises a power source coupled to the second switch in series and power is delivered from the power source to the battery when the first and second MOSFETs are turned on.Type: GrantFiled: August 22, 2006Date of Patent: January 5, 2010Assignee: O2Micro International LimitedInventors: Shiqiang Liu, Sean Xiao, Guoxing Li, Liusheng Liu
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Patent number: 7629771Abstract: A protection device for non-common ground buses is disclosed. The protection circuit includes a controller, a level shifter, a first group of switches, and a second group of switches. The controller together with the level shifter controls the first group and second group of switches. The non-common ground buses will be isolated when at least one group of the switches are turned off in an abnormal condition.Type: GrantFiled: December 27, 2006Date of Patent: December 8, 2009Assignee: O2Micro International, Ltd.Inventors: Guoxing Li, Shiqiang Liu, Sean Xiao
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Publication number: 20090091293Abstract: A system and method for cell balancing with smart low-voltage control circuit. The cell balancing system comprises a plurality of battery cells, an external bypass path for each cell, an internal bypass path for each cell, an input terminal receiving an enable signal for each cell, an input terminal receiving a selection signal, and a cell balancing unit for generating a configuration signal to conduct the external bypass path or internal bypass path. The enable signal is configured to enable a bypass current of each cell, and the selection signal is configured to select the external bypass path or internal bypass path. The cell balancing unit is employed to receive signals from input terminals, and generate a configuration signal to control the conductance of external bypass paths or internal bypass paths.Type: ApplicationFiled: December 15, 2008Publication date: April 9, 2009Inventors: Wei WANG, Guoxing Li, Sean XIAO
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Patent number: 7496216Abstract: A system and method of capturing a skin print from skin having ridges and valleys. A skin print sensor having a return/supply contact and a plurality of contact pads is provided. A finger is applied to the skin print sensor and data is stored representative of contact pads in contact with skin ridges.Type: GrantFiled: June 21, 2005Date of Patent: February 24, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: Sui-hing Leung, Sean Xiao-An Zhang, Chung Ching Yang