Patents by Inventor Hwanjoo Lee

Hwanjoo 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: 20240127760
    Abstract: A display apparatus includes a mode controller configured to generate a first control signal and a second control signal by using a gate-off voltage and a gate-on voltage; a gate driving circuit configured to generate an emission signal; a first pixel circuit including a driving transistor, a first transistor receiving the first control signal, a second transistor receiving the second control signal, a third transistor receiving the emission signal, a first light emitting element connected to the first transistor, and a second light emitting element connected to the second transistor; a first lens disposed on the first light emitting element; and a second lens disposed on the second light emitting element.
    Type: Application
    Filed: October 5, 2023
    Publication date: April 18, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: SeongHo Cho, DaeSung Jung, HwanJoo Lee, Haksu Kim
  • Publication number: 20240079366
    Abstract: A semiconductor package includes a package substrate, a semiconductor chip on the package substrate and having a first surface facing the package substrate and a second surface, opposite to the first surface, an encapsulant disposed on the package substrate and on a side surface of the semiconductor chip, a heat dissipation member on the semiconductor chip and spaced apart from the semiconductor chip, a bonding enhancing layer on the second surface of the semiconductor chip, a thermal interface material layer on the bonding enhancing layer and in a gap between the bonding enhancing layer and the heat dissipation member, wherein the thermal interface material layer includes liquid metal, and a porous barrier structure formed of a metal material and surrounding the bonding enhancing layer and the thermal interface material layer.
    Type: Application
    Filed: August 23, 2023
    Publication date: March 7, 2024
    Inventors: Jonggyu Lee, Jaechoon Kim, Taehwan Kim, Hwanjoo Park
  • Publication number: 20240005860
    Abstract: A display device includes a light-emitting element; a capacitor connected to and disposed between a first node and a second node; a first transistor including a first electrode connected to a reference voltage supply line and a second electrode connected to the first node, and supplying a reference voltage to the first node in response to a light-emission control signal of an n-th pixel row; a second transistor including a first electrode connected to the reference voltage supply line and a second electrode connected to the second node, and supplying the reference voltage to the second node in response to a first scan signal of an (n?1)-th pixel row; and a driving transistor including a gate electrode connected to the second node, a first electrode receiving a high-potential driving voltage, and a second electrode connected to a third node.
    Type: Application
    Filed: June 27, 2023
    Publication date: January 4, 2024
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Haksu KIM, Daesung JUNG, Hwanjoo LEE, Kwanghyun BAEK
  • Publication number: 20240005859
    Abstract: Disclosed are a display device and a method for operating pixels of the display device. The display device comprises: a light-emitting element; and a pixel circuit configured to control the light-emitting element, wherein the pixel circuit includes: a capacitor connected to and disposed between a first node and a second node; and a driving transistor including a gate electrode connected to the second node; a first electrode receiving a high-potential driving voltage; and a second electrode connected to a third node, wherein the pixel circuit is configured such that the same voltage is supplied to the first node and the second node during at least a portion of an operation period of the pixel circuit. Thus, occurrence of a reference voltage related short-circuit in the light-emitting element of the pixel circuit is suppressed to prevent occurrence of defective image display in each pixel and to improve reliability thereof.
    Type: Application
    Filed: June 27, 2023
    Publication date: January 4, 2024
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Haksu KIM, Hwanjoo LEE
  • Patent number: 9305483
    Abstract: A display device and a method for driving the same are discussed. The display device includes an image processing unit, a timing controller which receives various signals through a mobile industry processor interface (MIPI) connected to the image processing unit, and a display module displaying an image under the control of the timing controller. The timing controller includes a logic block for controlling the display module, and a self-recovery block which outputs a self-command signal for escaping an abnormal state when the logic block is faced with the abnormal state due to an external environment factor.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: April 5, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Hwanjoo Lee, Hayoung Ji
  • Patent number: 9182805
    Abstract: A display device includes a display panel having a plurality of gate lines and a plurality of data lines crossing each other and pixels formed at intersections thereof; a gate driving circuit that generates a gate pulse based on a gate power voltage and applies the gate pulse to the gate lines; a data driving circuit that divides the data power voltage to convert input digital video data into an analog data voltage and applies the data voltage to the data lines; a power voltage control circuit that detects an input frame frequency and generates a different power control signal in accordance with the detected frame frequency; and a power voltage adjusting circuit that adjusts at least one of the gate power voltage and the data power voltage differently from a predetermined reference level in response to the power control signal.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: November 10, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Minki Kim, Jinsung Kim, Hwanjoo Lee, Junghoon Woo
  • Patent number: 8848007
    Abstract: Embodiments of the invention relate to an organic light emitting diode (OLED) display and a method for driving the same. The OLED display includes a data driving circuit configured to output a data voltage to the display panel; a scan driving circuit configured to sequentially output a scan pulse synchronized with the data voltage to a display panel; and a timing controller configured to decide whether or not the multicolor data are inputted, to control the scan driving circuit and the data driving circuit in a normal mode when the multicolor data are inputted, and to control the scan driving circuit and the data driving circuit in a current saving mode when the multicolor data are not inputted.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: September 30, 2014
    Assignee: LG Display Co., Ltd.
    Inventor: Hwanjoo Lee
  • Publication number: 20140118330
    Abstract: A display device and a method for driving the same are discussed. The display device includes an image processing unit, a timing controller which receives various signals through a mobile industry processor interface (MIPI) connected to the image processing unit, and a display module displaying an image under the control of the timing controller. The timing controller includes a logic block for controlling the display module, and a self-recovery block which outputs a self-command signal for escaping an abnormal state when the logic block is faced with the abnormal state due to an external environment factor.
    Type: Application
    Filed: October 29, 2013
    Publication date: May 1, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Hwanjoo LEE, Hayoung JI
  • Patent number: 8605042
    Abstract: A sensing device and a method for amplifying an output of the sensing device are disclosed. The sensing device includes a sensor array including a plurality of sensors and an amplifier circuit that gives different weighted values to at least some of sensor outputs obtained from the sensor array and amplifies each of the at least some sensor outputs.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: December 10, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Suhyuk Jang, Hwanjoo Lee
  • Patent number: 8384678
    Abstract: A touch sensing device and a method for correcting an output thereof are disclosed. The touch sensing device includes a touch sensor array including a plurality of touch sensors, a plurality of integrated circuits (ICs) that converts an output of the touch sensor array into digital data and generates raw data, and a data correction unit that generates correction values using differential values between adjacent raw data in the raw data generated by the ICs and removes successive correction values equal to or greater than a predetermined critical value from the correction values when a number of successive correction values equal to or greater than the predetermined critical value is less than a predetermined reference value.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: February 26, 2013
    Assignee: LG Display Co. Ltd.
    Inventors: Suhyuk Jang, Hwanjoo Lee
  • Publication number: 20130002641
    Abstract: A display device includes a display panel having a plurality of gate lines and a plurality of data lines crossing each other and pixels formed at intersections thereof; a gate driving circuit that generates a gate pulse based on a gate power voltage and applies the gate pulse to the gate lines; a data driving circuit that divides the data power voltage to convert input digital video data into an analog data voltage and applies the data voltage to the data lines; a power voltage control circuit that detects an input frame frequency and generates a different power control signal in accordance with the detected frame frequency; and a power voltage adjusting circuit that adjusts at least one of the gate power voltage and the data power voltage differently from a predetermined reference level in response to the power control signal.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 3, 2013
    Inventors: Minki Kim, Jinsung Kim, Hwanjoo Lee, Junghoon Woo
  • Patent number: 8232950
    Abstract: A liquid crystal display and a method of driving the same are disclosed. The liquid crystal display includes a liquid crystal display panel including data lines and gate lines crossing each other, and liquid crystal cells arranged in a matrix forma, a horizontal polarity controller that compares digital video data with a critical value and inverts a logic state of a horizontal polarity conversion signal when polarities of the digital video data lean based on the comparative result, a data drive circuit that converts the digital video data into positive and negative data voltages and controls horizontal polarity inversion periods of the data voltages in response to the horizontal polarity conversion signal, and a gate drive circuit that supplies scan signals to the gate lines.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: July 31, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Donghoon Cha, Suhyuk Jang, Hwanjoo Lee
  • Publication number: 20120139977
    Abstract: Embodiments of the invention relate to an organic light emitting diode (OLED) display and a method for driving the same. The OLED display includes a data driving circuit configured to output a data voltage to the display panel; a scan driving circuit configured to sequentially output a scan pulse synchronized with the data voltage to a display panel; and a timing controller configured to decide whether or not the multicolor data are inputted, to control the scan driving circuit and the data driving circuit in a normal mode when the multicolor data are inputted, and to control the scan driving circuit and the data driving circuit in a current saving mode when the multicolor data are not inputted.
    Type: Application
    Filed: September 16, 2011
    Publication date: June 7, 2012
    Inventor: Hwanjoo LEE
  • Publication number: 20100097355
    Abstract: A touch sensing device and a method for correcting an output thereof are disclosed. The touch sensing device includes a touch sensor array including a plurality of touch sensors, a plurality of integrated circuits (ICs) that converts an output of the touch sensor array into digital data and generates raw data, and a data correction unit that generates correction values using differential values between adjacent raw data in the raw data generated by the ICs and removes successive correction values equal to or greater than a predetermined critical value from the correction values when a number of successive correction values equal to or greater than the predetermined critical value is less than a predetermined reference value.
    Type: Application
    Filed: July 8, 2009
    Publication date: April 22, 2010
    Inventors: Suhyuk Jang, Hwanjoo Lee
  • Publication number: 20100097345
    Abstract: A sensing device and a method for amplifying an output of the sensing device are disclosed. The sensing device includes a sensor array including a plurality of sensors and an amplifier circuit that gives different weighted values to at least some of sensor outputs obtained from the sensor array and amplifies each of the at least some sensor outputs.
    Type: Application
    Filed: August 4, 2009
    Publication date: April 22, 2010
    Inventors: Suhyuk Jang, Hwanjoo Lee
  • Publication number: 20090251451
    Abstract: A liquid crystal display and a method of driving the same are disclosed. The liquid crystal display includes a liquid crystal display panel including data lines and gate lines crossing each other, and liquid crystal cells arranged in a matrix forma, a horizontal polarity controller that compares digital video data with a critical value and inverts a logic state of a horizontal polarity conversion signal when polarities of the digital video data lean based on the comparative result, a data drive circuit that converts the digital video data into positive and negative data voltages and controls horizontal polarity inversion periods of the data voltages in response to the horizontal polarity conversion signal, and a gate drive circuit that supplies scan signals to the gate lines.
    Type: Application
    Filed: October 9, 2008
    Publication date: October 8, 2009
    Inventors: Donghoon Cha, Suhyuk Jang, Hwanjoo Lee