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).

  • Publication number: 20070001517
    Abstract: A sampled-data analog circuit includes a level-crossing detector. The level-crossing detector controls sampling switches to provide a precise sample of the output voltage when the level-crossing detector senses the predetermined level crossing of the input signal. The level-crossing detection may be a zero-crossing detection. An optional common-mode feedback circuit can keep the output common-mode voltage substantially constant.
    Type: Application
    Filed: June 16, 2006
    Publication date: January 4, 2007
    Inventor: Hae-Seung Lee
  • Publication number: 20060208938
    Abstract: Described is a switched capacitor circuit for performing an analog circuit function. Unlike conventional switched capacitor circuits employing operational amplifiers, the switched capacitor circuit uses a comparator and does not require direct feedback between the input and output of the comparator. The switched capacitor circuit includes a first and a second switched capacitance network, a comparator and a current source. The first switched capacitance network has an input terminal to receive a circuit input voltage during a first phase. The comparator has an input terminal in communication with the first switched capacitance network and an output terminal in communication with the second switched capacitance network through a switched terminal. The current source communicates with the switched capacitance networks and supplies a current to charge the networks during a second phase. The circuit can be used, for example, to provide high gain amplification in integrated circuits.
    Type: Application
    Filed: January 30, 2006
    Publication date: September 21, 2006
    Applicant: Massachusetts Institute of Technology
    Inventors: John Fiorenza, Todd Sepke, Hae-Seung Lee, Charles Sodini
  • Publication number: 20060097633
    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: Application
    Filed: November 7, 2005
    Publication date: May 11, 2006
    Inventors: Yoon-Hyeung Cho, Jong-Hyuk Lee, Hae-Seung Lee, Won-Jong Kim, Jin-Baek Choi
  • Publication number: 20060077273
    Abstract: A method and apparatus to perform low noise reset of a pixel circuit within an active pixel image sensor.
    Type: Application
    Filed: October 11, 2005
    Publication date: April 13, 2006
    Inventors: Hae-Seung Lee, Keith Fife
  • Patent number: 7002501
    Abstract: A reconfigurable ADC includes a plurality of reconfigurable blocks for allowing the ADC to provide a plurality of architectures. In one embodiment, the ADC can be configured to operate in a pipeline mode and a sigma-delta mode. This arrangement provides an ADC having a relatively large range of bandwidth and resolution.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: February 21, 2006
    Assignee: Massachusetts Institute of Technology
    Inventors: Kush Gulati, Hae-Seung Lee
  • Publication number: 20050218795
    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: Application
    Filed: March 22, 2005
    Publication date: October 6, 2005
    Inventors: Jong-Hyuk Lee, Yoon-Hyeung Cho, Hyun-Jung Yang, Won-Jong Kim, Hae-Seung Lee
  • Publication number: 20050190092
    Abstract: A reconfigurable ADC includes a plurality of reconfigurable blocks for allowing the ADC to provide a plurality of architectures. In one embodiment, the ADC can be configured to operate in a pipeline mode and a sigma-delta mode. This arrangement provides an ADC having a relatively large range of bandwidth and resolution.
    Type: Application
    Filed: November 8, 2004
    Publication date: September 1, 2005
    Inventors: Kush Gulati, Hae-Seung Lee
  • Publication number: 20050170210
    Abstract: An organic electroluminescent (EL) device including an organic EL unit sealed by an encapsulation layer comprising a layered inorganic substance/polymer/curing agent nanocomposite. The organic EL device according to the present invention may have a flat glass substrate.
    Type: Application
    Filed: February 1, 2005
    Publication date: August 4, 2005
    Inventors: Won-Jong Kim, Hae-Seung Lee, Jong-Hyuk Lee, Yoon-Hyeung Cho, Hyun-Jung Yang
  • Patent number: 6903670
    Abstract: A circuit and method measure the output voltage of a CMOS pixel in a manner that substantially reduces all columnar pattern noise due to mismatches in the signal processing circuits including the correlated double sampling amplifiers and A/D converters. The circuit includes a test switch, operatively connected between a reference voltage source and a correlated double sampling amplifier, for applying a test voltage from the reference voltage source when the state of the test switch is ON to the correlated double sampling amplifier.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: June 7, 2005
    Assignee: SMaL Camera Technologies
    Inventors: Hae-Seung Lee, Keith Glen Fife
  • Patent number: 6891322
    Abstract: A filter layer for a display and a method of preparing the filter layer, and a display including the filter layer, are provided. The filter layer for a display includes oxide particles and nano-sized metal particulates adhered to the surface of the oxide particles. A surface plasma resonance (SPR) phenomenon is triggered at the interface of the oxide/metal to selectively absorb light of at least one predetermined wavelength.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: May 10, 2005
    Assignee: Samsung SDI, Co., Ltd.
    Inventors: Jong-Hyuk Lee, Yoon-hyung Cho, Hae-Seung Lee, Dong-Sik Zang, Jung-Hwan Park
  • Publication number: 20050083422
    Abstract: A circuit for a pixel site in an imaging array includes a light-detecting element to convert incident light to a photocurrent and a reset transistor, operatively connected to the light-detecting element, to reset a voltage associated with the light-detecting element. The reset transistor hard resets the voltage associated with the light-detecting element and soft resets the voltage associated with the light-detecting element after the generation of the hard reset of the voltage associated with the light-detecting element. A pixel voltage of a column or row line is also measured by hard resetting the column or row line voltage to a first predetermined voltage; soft resetting the column or row line voltage to a first pixel voltage; hard resetting the column or row line voltage to a second predetermined voltage; soft resetting the column or row line voltage to a second pixel voltage; and determining a difference between the first and second pixel voltages, the difference being the measured pixel voltage.
    Type: Application
    Filed: January 6, 2004
    Publication date: April 21, 2005
    Inventors: Hae-Seung Lee, Keith Fife, Lane Brooks, Jungwook Yang
  • Patent number: 6881992
    Abstract: A pixel site of a semiconductor imager structure includes a substrate layer of a first dopant type; a photodiode being formed of a doped well region within the substrate layer, the doped well region being of a second dopant type; a transistor wherein a terminal of the transistor being provided within the doped well region, the terminal of the transistor being of the second dopant type and of a dopant concentration greater than a dopant concentration of the doped well region; and an oxide layer formed over the substrate layer, the doped well region, and the terminal of the transistor. The oxide layer has a varying height such that a height of the oxide layer associated with the doped well region is thicker than a height of the oxide layer associated with the terminal of the transistor. The oxide layer includes a step region being located where the height of the oxide layer transitions from the height associated with the doped well region to the height associated with the terminal of the transistor.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: April 19, 2005
    Assignee: SMAL Camera Technologies
    Inventors: Hae-Seung Lee, Keith Glen Fife
  • Patent number: 6864822
    Abstract: A reconfigurable ADC includes a plurality of reconfigurable blocks for allowing the ADC to provide a plurality of architectures. In one embodiment, the ADC can be configured to operate in a pipeline mode and a sigma-delta mode. This arrangement provides an ADC having a relatively large range of bandwidth and resolution.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: March 8, 2005
    Assignee: Massachusetts Institute of Technology
    Inventors: Kush Gulati, Hae-Seung Lee
  • Publication number: 20050046344
    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: Application
    Filed: September 2, 2004
    Publication date: March 3, 2005
    Inventors: Jong-Hyuk Lee, Hae-Seung Lee, Yoon-Hyeung Cho, Won-Jong Kim, Jin-Woo Park
  • Publication number: 20050046348
    Abstract: Provided are an organic electroluminescent device and a method of manufacturing the same. An organic electroluminescent device, comprising a rear substrate, an organic electroluminescent unit formed on one surface of the rear substrate and having a first electrode, an organic film, and a second electrode, and a front substrate joined to the rear substrate and having a porous oxide layer based on alumina on an inner surface of the front substrate. The alumina is hydrated amorphous alumina.
    Type: Application
    Filed: August 25, 2004
    Publication date: March 3, 2005
    Inventors: Jong-Hyuk Lee, Hae-Seung Lee, Yoon-Hyeung Cho, Won-Jong Kim, Jin-Woo Park
  • Patent number: 6832291
    Abstract: A redundant array of inexpensive disks (RAID) system includes a plurality of defect-adaptive memory devices for sequentially storing information needed for data recovery in a predetermined region of a recording medium in the form of block, and storing data in a region other than the predetermined region. A plurality of caches are connected to the adaptive memory devices to store information blocks needed for data recovery, the information blocks being read from a predetermined memory device. A controller is connected to each adaptive memory device and cache to control the writing and reading of data and information needed for data recovery in each memory device, calculate information needed for recovery of data read from each memory device, and store the information needed for recovery of data calculated in a predetermined cache.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: December 14, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hae-Seung Lee
  • Publication number: 20040234813
    Abstract: An organic electroluminescent device which has a low moisture permeability and an oxygen permeability. The organic electroluminescent device includes a substrate, an organic light-emitting unit having a sequentially stacked structure of a first electrode, an organic film, and a second electrode formed on a surface of the substrate, and an organic-inorganic composite film made of a dehydrated polycondensate of a hydrolyzed product of trialkoxy metal formed on an upper surface of the second electrode of the organic light-emitting unit. The organic-inorganic composite film simplifies a manufacture process and has high visible light transmittance. Therefore, the organic-inorganic composite film can be used as an intermediate layer of a front emission type organic electroluminescent device. Also, the organic-inorganic composite film has excellent prevention function of the entry of moisture and/or oxygen.
    Type: Application
    Filed: May 10, 2004
    Publication date: November 25, 2004
    Inventors: Jong-Hyuk Lee, Yoon-Hyeung Cho, Hae-Seung Lee, Won-Jong Kim
  • Publication number: 20040174450
    Abstract: A circuit for a pixel site in an imaging array includes a light-detecting element to convert incident light to a photocurrent and a reset transistor, operatively connected to the light-detecting element, to reset a voltage associated with the light-detecting element. The reset transistor hard resets the voltage associated with the light-detecting element and soft resets the voltage associated with the light-detecting element after the generation of the hard reset of the voltage associated with the light-detecting element. A pixel voltage of a column or row line is also measured by hard resetting the column or row line voltage to a first predetermined voltage; soft resetting the column or row line voltage to a first pixel voltage; hard resetting the column or row line voltage to a second predetermined voltage; soft resetting the column or row line voltage to a second pixel voltage; and determining a difference between the first and second pixel voltages, the difference being the measured pixel voltage.
    Type: Application
    Filed: January 6, 2004
    Publication date: September 9, 2004
    Inventors: Hae-Seung Lee, Keith Glen Fife, Lane G. Brooks, Jungwook Yang
  • Publication number: 20040174449
    Abstract: A circuit for a pixel site in an imaging array includes a light-detecting element to convert incident light to a photocurrent and a reset transistor, operatively connected to the light-detecting element, to reset a voltage associated with the light-detecting element. The reset transistor hard resets the voltage associated with the light-detecting element and soft resets the voltage associated with the light-detecting element after the generation of the hard reset of the voltage associated with the light-detecting element. A pixel voltage of a column or row line is also measured by hard resetting the column or row line voltage to a first predetermined voltage; soft resetting the column or row line voltage to a first pixel voltage; hard resetting the column or row line voltage to a second predetermined voltage; soft resetting the column or row line voltage to a second pixel voltage; and determining a difference between the first and second pixel voltages, the difference being the measured pixel voltage.
    Type: Application
    Filed: January 6, 2004
    Publication date: September 9, 2004
    Inventors: Hae-Seung Lee, Keith Glen Fife, Lane G. Brooks, Jungwook Yang
  • Publication number: 20040174754
    Abstract: A sense node voltage relating to light intensity incident upon a light-detecting element is measured. To realize this measurement, a first integration reset pulse is generated to enable a resetting of the sense node voltage to a voltage value substantially equal to a reset voltage value associated with the first integration reset pulse, an edge of the first integration reset pulse triggering a beginning of a first integration period. Thereafter, a second integration reset pulse is generated to enable a resetting of the sense node voltage to a voltage value substantially equal to a reset voltage value associated with the second integration reset pulse, an edge of the second integration reset pulse triggering a beginning of a second integration period.
    Type: Application
    Filed: January 5, 2004
    Publication date: September 9, 2004
    Inventors: Hae-Seung Lee, Keith Glen Fife, Lane G. Brooks