Patents by Inventor Hae-Seung Lee

Hae-Seung Lee 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).

  • 2-phase threshold detector based circuits
    Patent number: 8432192
    Abstract: A switched capacitor circuit includes a threshold detector to generate a threshold detection signal when a difference between first and second input signals crosses a predetermined level. A coarse current source produces a coarse ramp. A series sampling capacitor samples a coarse output voltage when the threshold detector indicates a first threshold crossing. The sampling capacitor is connected in series with a fine current source producing a fine ramp.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: April 30, 2013
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Matthew Guyton, Hae-Seung Lee
  • CURABLE CYCLIC ANHYDRIDE COPOLYMER/SILICONE COMPOSITION
    Publication number: 20130041084
    Abstract: Disclosed is a curable silicone composition for preparing release layers and pressure sensitive adhesives, and to substrates bearing a layer of the cured composition. More specifically, this invention relates to a silicone composition, curable in the absence of both catalysts and actinic radiation comprising a cyclic anhydride copolymer and an amine-terminated polysiloxane.
    Type: Application
    Filed: August 8, 2011
    Publication date: February 14, 2013
    Inventors: Joon Chatterjee, Timothy D. Filiatrault, Hae-Seung Lee, David S. Hays, Naimul Karim, Babu N. Gaddam
  • Offset cancellation for sampled-data circuits
    Patent number: 8373489
    Abstract: A comparator based circuit with effective offset cancellation includes first and second amplifiers and an offset capacitor operatively connected to the first and second amplifiers. An offset voltage source generates an offset voltage. A first switch connects the offset voltage source to ground during a first time period. The first amplifier generates an output voltage in response to the first switch connecting the offset voltage source to ground during the first time period. A second switch connects the offset capacitor to ground during a second time period. The first switch disconnects the offset voltage source from ground during a third time period, and the second switch disconnects the offset capacitor from ground during the third time period.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: February 12, 2013
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Hae-Seung Lee
  • RADIATION CURABLE POLY(ISOBUTYLENE) ADHESIVE COPOLYMERS HAVING PENDENT AMINE GROUPS
    Publication number: 20120322910
    Abstract: The disclosure provides pressure-sensitive adhesives and adhesive sealants prepared from amine-modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Application
    Filed: June 20, 2011
    Publication date: December 20, 2012
    Inventors: Joon Chatterjee, Hae-Seung Lee, Babu N. Gaddam
  • 2-PHASE THRESHOLD DETECTOR BASED CIRCUITS
    Publication number: 20120293232
    Abstract: A switched capacitor circuit includes a threshold detector to generate a threshold detection signal when a difference between first and second input signals crosses a predetermined level. A coarse current source produces a coarse ramp. A series sampling capacitor samples a coarse output voltage when the threshold detector indicates a first threshold crossing. The sampling capacitor is connected in series with a fine current source producing a fine ramp.
    Type: Application
    Filed: May 20, 2011
    Publication date: November 22, 2012
    Applicant: Cambridge Analog Technologies, Inc.
    Inventors: Matthew Guyton, Hae-Seung Lee
  • Passive offset and overshoot cancellation for sampled-data circuits
    Patent number: 8305131
    Abstract: A zero-crossing detector with effective offset cancellation includes a set of series connected capacitors and an amplifier having an input terminal. An offset capacitor is operatively connected between the amplifier and the set of series connected capacitors. A switch is operatively connected to the input terminal, and an offset sampling capacitor is operatively connected to the switch. The switch connects the offset sampling capacitor to the input terminal of the amplifier during a charge transfer phase.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: November 6, 2012
    Assignee: Maxim Integrated, Inc.
    Inventor: Hae-Seung Lee
  • Constant slope ramp circuits for sampled-data circuits
    Patent number: 8294495
    Abstract: A circuit includes a level-crossing detector to generate a level-crossing detection signal when an input signal crosses a predetermined voltage level. A first stage set of capacitors is operatively coupled to the level-crossing detector. A ramp circuit is operatively coupled to the set of series-connected capacitors. A second stage set of capacitors is operatively coupled to the first stage set of capacitors and the ramp circuit. The ramp circuit includes a feedback capacitor and a preset switch to provide a linear ramp output.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: October 23, 2012
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Hae-Seung Lee
  • System and Method for Background Calibration of Time Interleaved Analog to Digital Converters
    Publication number: 20120262318
    Abstract: Various embodiments allow for background calibration of channel-to-channel mismatch errors. In certain embodiments calibration is accomplished by comparing the output of I-ADCs against the output of a reference ADC and correlating the difference to a known function to obtain a correction signal that can be used to correct channel-to-channel mismatch errors.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 18, 2012
    Applicant: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Matthew Allen Zornig Straayer, Hae-Seung Lee
  • ISOBUTYLENE COPOLYMER WITH GRAFTED POLYMER GROUPS
    Publication number: 20120208013
    Abstract: Disclosed are copolymers which comprise: a) an isobutylene copolymer having grafted polymer groups, b) optionally a tackifier, and c) optionally a non-functionalized poly(isobutylene) polymer. The compositions are useful in adhesives and coatings.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 16, 2012
    Inventors: Jason D. Clapper, Hae-Seung Lee, Joon Chatterjee, Babu N. Gaddam
  • MOISTURE CURABLE ISOBUTYLENE ADHESIVE COPOLYMERS
    Publication number: 20120141787
    Abstract: The disclose provides pressure-sensitive adhesives and adhesive sealants prepared from alkoxysilane modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Application
    Filed: November 2, 2011
    Publication date: June 7, 2012
    Inventors: Hae-Seung Lee, Joon Chatterjee, Babu N. Gaddam, Gregg A. Caldwell
  • IONICALLY CROSSLINKABLE POLY(ISOBUTYLENE) ADHESIVE POLYMERS
    Publication number: 20120122359
    Abstract: Adhesive (co)polymers of this disclosure comprise: a) an isobutylene copolymer having pendent succinate groups and optionally a tackifier. The pendent succinic acid groups ionically crosslinks the isobutylene copolymer by hydrogen boding with adjacent pendent succinic acid groups.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 17, 2012
    Inventors: Hae-Seung Lee, Joon Chatterjee, Gregg A. Caldwell, Babu N. Gaddam
  • UV CURABLE ANHYDRIDE-MODIFIED POLY(ISOUTYLENE)
    Publication number: 20120123011
    Abstract: An adhesive (co)polymers comprising: a) an isobutylene copolymer having pendent anhydride groups, b) a polyamine photobase generator and c) optionally a tackifier is described.
    Type: Application
    Filed: October 25, 2011
    Publication date: May 17, 2012
    Inventors: Hae-Seung Lee, Joon Chatterjee, Gregg A. Caldwell, Babu N. Gaddam
  • RADIATION CURABLE POLY(ISOBUTYLENE) ADHESIVE COPOLYMERS
    Publication number: 20120082847
    Abstract: The disclose provides pressure-sensitive adhesives and adhesive sealants prepared from modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Application
    Filed: June 27, 2011
    Publication date: April 5, 2012
    Inventors: Hae-Seung Lee, Guy D. Joly, Joon Chatterjee, Marie Aloshyna ep Lesuffleur, Jay M. Jennen, Jingjing Ma, Gregg A. Caldwell, Babu N. Gaddam, Larry R. Krepski
  • Organic electroluminescent device and method of manufacturing the same
    Patent number: 8053985
    Abstract: An organic electroluminescent device and its method of manufacturing are provided. The organic electroluminescent device may include a rear substrate, an organic electroluminescent unit including a first electrode, an organic film, and a second electrode stacked on a surface of the rear substrate. It may also include a front substrate joined to the rear substrate to seal an internal space in which the organic electroluminescent unit is disposed. It may also include a porous oxide layer composed of a porous silica and a metal compound on a lower surface thereof. A device constructed according to the present invention may have excellent adsorption of moisture and oxygen, thereby increasing the life span of the device.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: November 8, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jong-Hyuk Lee, Hae-Seung Lee, Yoon-Hyeung Cho, Won-Jong Kim, Jin-Woo Park
  • Organic electroluminescence device and manufacturing method thereof
    Patent number: 8052499
    Abstract: An organic electroluminescence (EL) device which has a rear substrate, an organic EL element formed on the rear substrate and having a laminate structure in which a first electrode, an organic layer and a second electrode are sequentially laminated, a front substrate coupled to the rear substrate via sealant to seal an internal space in which the organic EL element is accommodated, and a transparent nanoporous oxide layer having nanoporous oxide particles disposed in the internal space formed by the rear substrate and the front substrate. Since the organic electroluminescence device includes the transparent nanoporous oxide layer having the nanoporous oxide particles and pores, it has an improved lifetime by increased moisture and oxygen absorbing properties.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: November 8, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jong-Hyuk Lee, Yoon-Hyeung Cho, Hyun-Jung Yang, Won-Jong Kim, Hae-Seung Lee
  • Organic electroluminescent device and method for manufacturing the same
    Patent number: 8044584
    Abstract: An organic electroluminescent device includes a substrate, an encapsulation substrate, an organic electroluminescent portion interposed between the substrate and the encapsulation substrate and a transparent moisture absorption layer. The transparent moisture absorption layer comprises at least one of a metal oxide and a metal salt with an average particle diameter of about 100 nm or less, a binder, and a dispersant. The transparent moisture absorption layer may be disposed in an internal space provided by the substrate and the encapsulation substrate and may be used in a front emission type organic electroluminescent device.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: October 25, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Yoon-Hyeung Cho, Jong-Hyuk Lee, Hae-Seung Lee, Won-Jong Kim, Jin-Baek Choi
  • 2-PHASE THRESHOLD DETECTOR BASED CIRCUITS
    Publication number: 20110169340
    Abstract: A switched capacitor circuit includes a threshold detector to generate a threshold detection signal when a difference between first and second input signals crosses a predetermined level. A variable current source produces a varying amount of current in response to the difference between the input signals. A voltage measurement means produce a measurement signal in response to the difference between the input signals. A correction means produces a correction signal in response to the measurement signal to produce an optimum coarse phase overshoot. A timing comparison means produces a timing signal in response to the difference between the input signals. A correction means produces a correction signal in response to the timing signal to produce an optimum coarse phase overshoot.
    Type: Application
    Filed: January 3, 2011
    Publication date: July 14, 2011
    Applicant: CAMBRIDGE ANALOG TECHNOLOGIES LLC
    Inventors: Matthew Z. Straayer, Hae-Seung Lee, Kush Gulati, Carlos E. Munoz
  • OFFSET CANCELLATION FOR SAMPLED-DATA CITCUITS
    Publication number: 20110032003
    Abstract: A comparator based circuit with effective offset cancellation includes first and second amplifiers and an offset capacitor operatively connected to the first and second amplifiers. An offset voltage source generates an offset voltage. A first switch connects the offset voltage source to ground during a first time period. The first amplifier generates an output voltage in response to the first switch connecting the offset voltage source to ground during the first time period. A second switch connects the offset capacitor to ground during a second time period. The first switch disconnects the offset voltage source from ground during a third time period, and the second switch disconnects the offset capacitor from ground during the third time period.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 10, 2011
    Applicant: CAMBRIDGE ANALOG TECHNOLOGIES, INC.
    Inventor: Hae-Seung Lee
  • Offset cancellation for sampled-data circuits
    Patent number: 7843233
    Abstract: A comparator based circuit with effective offset cancellation includes first and second amplifiers and an offset capacitor operatively connected to the first and second amplifiers. An offset voltage source generates an offset voltage. A first switch connects the offset voltage source to ground during a first time period. The first amplifier generates an output voltage in response to the first switch connecting the offset voltage source to ground during the first time period. A second switch connects the offset capacitor to ground during a second time period. The first switch disconnects the offset voltage source from ground during a third time period, and the second switch disconnects the offset capacitor from ground during the third time period.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: November 30, 2010
    Assignee: Cambridge Analog Technologies, Inc.
    Inventor: Hae-Seung Lee
  • Organic electroluminescence device and manufacturing method thereof
    Patent number: 7834540
    Abstract: An organic electroluminescence (EL) device which has a rear substrate, an organic EL element formed on the rear substrate and having a laminate structure in which a first electrode, an organic layer and a second electrode are sequentially laminated, a front substrate coupled to the rear substrate via sealant to seal an internal space in which the organic EL element is accommodated, and a transparent nanoporous oxide layer having nanoporous oxide particles disposed in the internal space formed by the rear substrate and the front substrate. Since the organic electroluminescence device includes the transparent nanoporous oxide layer having the nanoporous oxide particles and pores, it has an improved lifetime by increased moisture and oxygen absorbing properties.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: November 16, 2010
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jong-Hyuk Lee, Yoon-Hyeung Cho, Hyun-Jung Yang, Won-Jong Kim, Hae-Seung Lee