Patents by Inventor Won Ji LEE

Won Ji 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: 20240357933
    Abstract: An organic electric element includes a first electrode, a second electrode, and an organic material layer between the first electrode and the second electrode. The organic material layer includes a light-emitting layer, a hole transport layer between the first electrode and the light-emitting layer, and a plurality of emission-auxiliary layers between the light-emitting layer and the hole transport layer. The plurality of emission-auxiliary layers include a first emission-auxiliary layer adjacent to the hole transport layer and a second emission-auxiliary layer adjacent to the light-emitting layer. Each of the first emission-auxiliary layer and the second emission-auxiliary layer is independently formed of one type of a compound without additional doping. The first emission-auxiliary layer includes a compound represented by Formula 1 or Formula 2, and the second emission-auxiliary layer includes a compound represented by Formula A-4-1 or Formula A-4-2.
    Type: Application
    Filed: April 26, 2024
    Publication date: October 24, 2024
    Inventors: BUM SUNG LEE, HYUN JI OH, SOUNG YUN MUN, SUN HEE LEE, WON SAM KIM, GUANG MING LI, MIN JI JO
  • Patent number: 12108671
    Abstract: An organic electric element according to an embodiment of the present disclosure includes a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode. The organic material layer includes a plurality of emission-auxiliary layers, and the HOMO energy levels of the plurality of emission-auxiliary layers are limited to specific conditions in relation to the neighboring organic material layers, thereby the driving voltage, the luminous efficiency and the life time of the organic electric element can be improved.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: October 1, 2024
    Assignee: DUK SAN NEOLUX CO., LTD.
    Inventors: Bum Sung Lee, Hyun Ji Oh, Soung Yun Mun, Sun Hee Lee, Won Sam Kim, Guang Ming Li, Min Ji Jo
  • Patent number: 12101998
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: September 24, 2024
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Min-Ji Park, Yun-Ji Lee, Won-Jang Jeong
  • Publication number: 20240186881
    Abstract: An embodiment of the present disclosure provides a zero standby power system, comprising a power supply device comprising a plurality of power stages and a zero standby power device configured to receive an on/off signal and to control connections respectively to the plurality of power stages based on the received on/off signal, wherein the zero standby power device may comprise an on/off controller configured to be maintained to be in an operation state and to receive an on/off signal at an arbitrary time point.
    Type: Application
    Filed: September 15, 2023
    Publication date: June 6, 2024
    Inventors: Won Tae LEE, Won Ji LEE, Chuen Sik JUNG, Gyu Won LEE
  • Publication number: 20240154538
    Abstract: According to an embodiment of the present disclosure, a resonant convertor for a power supply device may comprise a synchronous rectifier comprising at least one MOSFET to convert an alternating current into a direct current; a circuit isolation device to receive a state signal from a component included in a first circuit module and to generate a first synchronous rectifier control signal based on the received state signal; a load state detection module to detect a state of a load stage included in a second circuit side and to generate a second synchronous rectifier control signal based on the detected state; and a synchronous rectifier control module to receive the first and the second synchronous rectifier control signals and to control the synchronous rectifier based on at least one of the first and the second synchronous rectifier control signals.
    Type: Application
    Filed: July 7, 2022
    Publication date: May 9, 2024
    Inventors: Won Tae LEE, Won Ji LEE, Chuen Sik JUNG, Gyu Won LEE
  • Patent number: 11791706
    Abstract: The present invention relates a low power control device using a sleep timer, and more particularly, to a low power control device using a controllable sleep timer which disables each component of a circuit while discharging an output voltage Vo using a control signal of a sleep timer in which a width of an OFF signal is larger than a width of an ON signal in a light load state and sequentially enables each component of the circuit while charging the output voltage in a predetermined order to minimize power consumption according to a loading level of a load.
    Type: Grant
    Filed: February 16, 2023
    Date of Patent: October 17, 2023
    Assignee: POWER LSI CO.LTD
    Inventors: Won Tae Lee, Won Ji Lee, Chang Sik Shin, Chuen Sik Jung, Gyu Won Lee
  • Patent number: 11736008
    Abstract: The present invention relates to a multi-power supply device capable of controlling a sequence, and more particularly, to a multi-power supply device capable of controlling a sequence for a circuit in which two or more power sources are supplied from the outside and when one of the power sources has a problem so that the power is not supplied to an internal block, an internal voltage is stably supplied from another power source.
    Type: Grant
    Filed: February 16, 2023
    Date of Patent: August 22, 2023
    Assignee: Power LSI Co. ltd
    Inventors: Won Tae Lee, Won Ji Lee, Chang Sik Shin, Chuen Sik Jung, Gyu Won Lee
  • Patent number: 11736002
    Abstract: The present invention relates to an adaptive soft start and soft stop device for a converter, and more particularly, provides an adaptive soft start and soft stop device for a converter which controls a final output voltage to be increased or decreased with a predetermined gradient by increasing a duty at a predetermined rate or increases a frequency during a start period using an input voltage Vin and an output voltage Vo and decreasing the duty at a predetermined rate or decreases a frequency during a stop period.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: August 22, 2023
    Assignee: Power LSI Co. ltd
    Inventors: Won Tae Lee, Won Ji Lee, Chang Sik Shin, Chuen Sik Jung, Gyu Won Lee
  • Publication number: 20230231469
    Abstract: The present invention relates to an adaptive soft start and soft stop device for a converter, and more particularly, provides an adaptive soft start and soft stop device for a converter which controls a final output voltage to be increased or decreased with a predetermined gradient by increasing a duty at a predetermined rate or increases a frequency during a start period using an input voltage Vin and an output voltage Vo and decreasing the duty at a predetermined rate or decreases a frequency during a stop period.
    Type: Application
    Filed: June 28, 2021
    Publication date: July 20, 2023
    Inventors: Won Tae LEE, Won Ji LEE, Chang Sik SHIN, Chuen Sik JUNG, Gyu Won LEE
  • Publication number: 20230198369
    Abstract: The present invention relates a low power control device using a sleep timer, and more particularly, to a low power control device using a controllable sleep timer which disables each component of a circuit while discharging an output voltage Vo using a control signal of a sleep timer in which a width of an OFF signal is larger than a width of an ON signal in a light load state and sequentially enables each component of the circuit while charging the output voltage in a predetermined order to minimize power consumption according to a loading level of a load.
    Type: Application
    Filed: February 16, 2023
    Publication date: June 22, 2023
    Inventors: Won Tae LEE, Won Ji LEE, Chang Sik SHIN, Chuen Sik JUNG, Gyu Won LEE
  • Publication number: 20230198391
    Abstract: The present invention relates to a multi-power supply device capable of controlling a sequence, and more particularly, to a multi-power supply device capable of controlling a sequence for a circuit in which two or more power sources are supplied from the outside and when one of the power sources has a problem so that the power is not supplied to an internal block, an internal voltage is stably supplied from another power source.
    Type: Application
    Filed: February 16, 2023
    Publication date: June 22, 2023
    Inventors: Won Tae LEE, Won Ji LEE, Chang Sik SHIN, Chuen Sik JUNG, Gyu Won LEE
  • Patent number: 9913337
    Abstract: Disclosed is a control circuit of an LED lighting apparatus, which compensates for power for light emission of a lamp including LEDs. The control circuit can generate a compensation signal corresponding to change of power provided to the lamp, and uniformly maintain the power by controlling a current provided to the lamp in response to the compensation signal. Thus, the control circuit can compensate for the power change of the lamp due to a power supply environment factor in a building, region, or country or a temporarily unstable power supply environment factor, such that the lamp can emit light at uniform luminance.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: March 6, 2018
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Yong Goo Kim, Kyung Min Kim, Jong Min Lee, Young Suk Son, Won Ji Lee
  • Patent number: 9609702
    Abstract: Disclosed are an LED lighting apparatus and a control circuit thereof which controls the brightness of a lamp including LEDs using a dimmer. The LED lighting apparatus and the control circuit use a starting current based on a rectified voltage, in order to supply a holding current to the dimmer in a state where a lamp including LEDs is turned off.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: March 28, 2017
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Yong Goo Kim, Won Ji Lee, Kyung Min Kim, Jong Min Lee, Young Suk Son
  • Patent number: 9572210
    Abstract: Disclosed is a control circuit of an LED lighting apparatus having a dimming function. The control circuit provides a current path corresponding to light emitting states of LED channels in response to a rectified voltage, and performs dimming by controlling a current amount of the current path in response to a dimming control signal provided as an analog signal or digital signal.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: February 14, 2017
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Kyung Min Kim, Yong Goo Kim, Won Ji Lee, Jong Min Lee, Young Suk Son
  • Patent number: 9572220
    Abstract: Disclosed are an LED lighting apparatus and a control circuit thereof which controls illumination of a lamp including LEDs using a dimmer. The LED lighting apparatus includes a flicker control unit which provides a control signal corresponding to a rectified voltage having a low angle corresponding to a preset low angle region and equal to or less than a preset level or detects an initial abnormal waveform diagram of the rectified voltage and provides a control signal corresponding to the abnormal waveform period, and controls a current path for light emission of the lamp.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: February 14, 2017
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Yong Goo Kim, Won Ji Lee, Kyung Min Kim, Jong Min Lee, Min Soo Kim, Young Suk Son
  • Publication number: 20160219667
    Abstract: Disclosed is a control circuit of an LED lighting apparatus, which compensates for power for light emission of a lamp including LEDs. The control circuit can generate a compensation signal corresponding to change of power provided to the lamp, and uniformly maintain the power by controlling a current provided to the lamp in response to the compensation signal. Thus, the control circuit can compensate for the power change of the lamp due to a power supply environment factor in a building, region, or country or a temporarily unstable power supply environment factor, such that the lamp can emit light at uniform luminance.
    Type: Application
    Filed: April 3, 2014
    Publication date: July 28, 2016
    Applicant: SILICON WORKS CO., LTD.
    Inventors: Yong Goo KIM, Kyung Min KIM, Jong Min LEE, Young Suk SON, Won Ji LEE
  • Publication number: 20160150607
    Abstract: Disclosed are an LED lighting apparatus and a control circuit thereof which controls the brightness of a lamp including LEDs using a dimmer. The LED lighting apparatus and the control circuit use a starting current based on a rectified voltage, in order to supply a holding current to the dimmer in a state where a lamp including LEDs is turned off.
    Type: Application
    Filed: June 25, 2014
    Publication date: May 26, 2016
    Applicant: SILICONE WORKS CO., LTD.
    Inventors: Yong Goo KIM, Won Ji LEE, Kyung Min KIM, Jong Min LEE, Young Suk SON
  • Publication number: 20160143107
    Abstract: Disclosed are an LED lighting apparatus and a control circuit thereof which controls illumination of a lamp including LEDs using a dimmer. The LED lighting apparatus includes a flicker control unit which provides a control signal corresponding to a rectified voltage having a low angle corresponding to a preset low angle region and equal to or less than a preset level or detects an initial abnormal waveform diagram of the rectified voltage and provides a control signal corresponding to the abnormal waveform period, and controls a current path for light emission of the lamp.
    Type: Application
    Filed: June 25, 2014
    Publication date: May 19, 2016
    Applicant: SILICON WORKS CO., LTD.
    Inventors: Yong Goo KIM, Won Ji LEE, Kyung Min KIM, Jong Min LEE, Min Soo KIM, Young Suk SON
  • Patent number: 9288862
    Abstract: Disclosed is a light emitting diode lighting apparatus capable of improving a power factor and temperature characteristics. The light emitting diode lighting apparatus according to a preferred embodiment of the present invention includes a light source having a plurality of light emitting diode channels and performs a current regulating operation to allow a light source to emit light. The light source uses a current path provided by current regulating to emit light.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: March 15, 2016
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Yong Geun Kim, Sang Young Lee, Yong Goo Kim, Won Ji Lee, Young Suk Son
  • Publication number: 20150312984
    Abstract: Disclosed is a control circuit of an LED lighting apparatus having a dimming function. The control circuit provides a current path corresponding to light emitting states of LED channels in response to a rectified voltage, and performs dimming by controlling a current amount of the current path in response to a dimming control signal provided as an analog signal or digital signal.
    Type: Application
    Filed: December 27, 2013
    Publication date: October 29, 2015
    Inventors: Kyung Min KIM, Yong Goo KIM, Won Ji LEE, Jong Min LEE, Young Suk SON