Patents by Inventor Changju Lee

Changju 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: 20240141578
    Abstract: A washing machine including a tub; a water supply valve configured to open or close a flow path to supply water to the tub; and a controller configured to (a) control the water supply valve to supply water to the tub to a target water level, (b) determine whether water pressure of the water supply valve is normal based on supplying the water to the tub to the target water level, (c) based on determining that the water pressure of the water supply valve is abnormal, update water pressure information that includes water pressure and water supply operation time of the water supply valve by adjusting the water supply operation time, and (d) set the updated water pressure information to be used for controlling the water supply valve in an operation course of the washing machine.
    Type: Application
    Filed: September 13, 2023
    Publication date: May 2, 2024
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sukwoo PARK, Minjoo KIM, Changju OH, Sangyeol LEE, Jaepoong LEE
  • Publication number: 20240038157
    Abstract: A display system includes a host configured to transfer image data respectively corresponding to a plurality of frames through a main channel, and to transfer a synchronization signal that synchronizes a clock signal of the host with a clock signal of the display driving circuit through an auxiliary channel, a display panel configured to display the image data, and a display driving circuit configured to generate control signals driving the display panel, based on the synchronization signal received through the auxiliary channel. The host is configured to transfer the synchronization signal including a first synchronization signal and a second synchronization signal that is different from the first synchronization signal, to the display driving circuit, through the auxiliary channel.
    Type: Application
    Filed: July 12, 2023
    Publication date: February 1, 2024
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Changju LEE, Kyounghwan KWON, Junho HUH
  • Publication number: 20240029624
    Abstract: A display driving circuit for receiving image data from a host and driving a display panel, the display driving circuit including: an interface configured to receive the image data from the host; and a timing controller configured to control a first interrupt signal for waking up the host in a low-power mode and to control a second interrupt signal based on a light emission control signal, wherein the light emission control signal is for controlling a light emission time of a pixel included in the display panel, and wherein the timing controller is further configured to control a level of the second interrupt signal based on whether the image data has started to be received from the host in response to the first interrupt signal and the second interrupt signal.
    Type: Application
    Filed: June 14, 2023
    Publication date: January 25, 2024
    Inventors: Changju LEE, Sooyong KIM, Taesung KIM, Junho HUH
  • Patent number: 11817050
    Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.
    Type: Grant
    Filed: December 14, 2022
    Date of Patent: November 14, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Changju Lee, Yonjun Shin, Hoonmo Yang, Sungchul Yoon, Junghak Lee
  • Publication number: 20230206830
    Abstract: A stacked display driver integrated circuit (DDIC) configured to drive a display panel of a display device includes a first circuit and a second circuit. The first circuit is formed by a low-end process according to a first design rule such that the first circuit has a first critical dimension. The second circuit is formed by a high-end process according to a second design rule smaller than the first design rule such that the second circuit has a second critical dimension smaller than the first critical dimension. The first circuit and the second circuit are stacked in a vertical direction. The size of the stacked DDIC may be reduced by stacking, in the vertical direction, the first circuit including analog circuits and the second circuit including digital circuits.
    Type: Application
    Filed: November 14, 2022
    Publication date: June 29, 2023
    Inventors: Changju LEE, Kyoungmin LEE
  • Publication number: 20230110768
    Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.
    Type: Application
    Filed: December 14, 2022
    Publication date: April 13, 2023
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Changju Lee, Yonjun Shin, Hoonmo Yang, Sungchul Yoon, Junghak Lee
  • Patent number: 11615752
    Abstract: A backlight device includes LED elements divided into dimming groups; a panel driver configured to output a reference current for driving the LED elements; and pixel circuits, each of which is connected to the panel driver through a common line and is respectively configured to drive first LED elements comprised in a corresponding dimming group. Each of the pixel circuits is configured to: in a first period of a frame period, obtain a reference voltage based on the reference current and store the reference voltage, in a second period of the frame period, obtain luminance data of an image displayed by the corresponding dimming group, and in a third period of the frame period, drive the first LED elements during a light emitting time corresponding to the luminance data obtained in the second period using the reference voltage stored in the first period.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: March 28, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Changju Lee, Yongil Kwon, Yoon-Kyung Choi, Junho Huh
  • Publication number: 20230050409
    Abstract: A touch screen controller, a touch screen driving circuit and a touch screen system are provided. The touch screen driving circuit configured to drive a touch screen includes an analog driving circuit configured to provide driving signals to a display panel and a touch panel of the touch screen, and generate a touch sensing value based on a touch sensing signal from the touch panel; a display noise table (DNT) comprising display noise information indicating display noise that varies according to a driving state of the touch screen and image data; a feature extractor configured to extract a plurality of feature values from the driving state and the image data; and a touch processor configured to read a display noise value mapped to the plurality of feature values from the DNT, subtract the display noise value from the touch sensing value and generate a touch value.
    Type: Application
    Filed: October 31, 2022
    Publication date: February 16, 2023
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Changju LEE
  • Patent number: 11532269
    Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.
    Type: Grant
    Filed: July 21, 2021
    Date of Patent: December 20, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Changju Lee, Yonjun Shin, Hoonmo Yang, Sungchul Yoon, Junghak Lee
  • Publication number: 20220376259
    Abstract: An electrode for a secondary battery is disclosed herein. In some embodiments, an electrode for a secondary battery includes an electrode current collector; and an active material layer disposed on the electrode current collector, wherein the active material layer is prepared by coating an electrode slurry onto the electrode current collector, wherein the electrode slurry is an aqueous solution containing an anode active material, a conductive material, a surfactant and a binder is coated onto the electrode current collector, and wherein the binder comprises a water-soluble polymer.
    Type: Application
    Filed: August 27, 2021
    Publication date: November 24, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Suk In Noh, Sangwook Woo, Changju Lee
  • Patent number: 11487386
    Abstract: A touch screen controller, a touch screen driving circuit and a touch screen system are provided. The touch screen driving circuit configured to drive a touch screen includes an analog driving circuit configured to provide driving signals to a display panel and a touch panel of the touch screen, and generate a touch sensing value based on a touch sensing signal from the touch panel; a display noise table (DNT) comprising display noise information indicating display noise that varies according to a driving state of the touch screen and image data; a feature extractor configured to extract a plurality of feature values from the driving state and the image data; and a touch processor configured to read a display noise value mapped to the plurality of feature values from the DNT, subtract the display noise value from the touch sensing value and generate a touch value.
    Type: Grant
    Filed: May 12, 2021
    Date of Patent: November 1, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Changju Lee
  • Patent number: 11442572
    Abstract: A touch display controller, panel and system may include a select circuit having a first selectable input terminal connected to touch sensors, a second selectable input terminal connected to display pixels, and an output terminal; an analog front-end circuit coupled to the output terminal of the select circuit to receive a raw analog signal, and having a shared processing path for analog signals from both the touch sensors and the display pixels; and a control circuit configured to control the an analog front-end circuit based on which type of element among the touch sensors or the display pixels is connected to the analog front-end circuit.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: September 13, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jinbong Kim, Changju Lee, Yoonkyung Choi
  • Patent number: 11422653
    Abstract: The present disclosure provides a touch and display control device with a touch screen controller and a display driver. The touch screen controller receives a touch sensing signal, generates touch raw data based on the touch sensing signal, and extracts touch information based on the touch raw data. The display driver receives an original image from a host processor, directly receives the touch information from the touch screen controller, generates touch trajectory information by accumulating the touch information, internally generates a touch image to be displayed with the original image based on the touch trajectory information, generates a composite image by synthesizing the original image and the touch image, and controls a display panel to display the composite image. The display driver includes a memory storing the touch trajectory information.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: August 23, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Changju Lee
  • Patent number: 11403983
    Abstract: A display chipset structure that is based on an integrated display controller is provided. The display controller includes including a display processor comprising a first digital circuit, and configured to receive image data from an application processor (AP) and output the image data to a first component driver chip configured to drive a gate line and a source line of a display panel; and a touch processor comprising a second digital circuit, and configured to receive touch data from a second component driver chip configured to drive sensing electrodes of a touch panel. The display controller is implemented as one semiconductor chip and separated from each of the first and second component driver chips, and the display processor and the touch processor communicate with each other through an internal interconnection of the one semiconductor chip.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: August 2, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Changju Lee, Yoonkyung Choi, Jinbong Kim, Junho Huh
  • Publication number: 20220114957
    Abstract: A display system including a host processor and a display driver integrated circuit may be provided. The host processor may generate a clock signal that swings swinging between a high level and a low level, generate and output a first synchronization signal based on the clock signal, generate a wakeup interrupt by measuring a frame update period of a display panel, generates frame data based on the first synchronization signal by enabling an image providing path based on the wakeup interrupt, and output the frame data for every frame update period. The display driver integrated circuit may receive the first synchronization signal and the frame data from the host processor, and control the display panel such that a frame image corresponding to the frame data is displayed on the display panel based on the first synchronization signal without storing the frame data.
    Type: Application
    Filed: July 21, 2021
    Publication date: April 14, 2022
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Changju LEE, Yonjun SHIN, Hoonmo YANG, Sungchul YOON, Junghak LEE
  • Publication number: 20210397327
    Abstract: A touch screen controller, a touch screen driving circuit and a touch screen system are provided. The touch screen driving circuit configured to drive a touch screen includes an analog driving circuit configured to provide driving signals to a display panel and a touch panel of the touch screen, and generate a touch sensing value based on a touch sensing signal from the touch panel; a display noise table (DNT) comprising display noise information indicating display noise that varies according to a driving state of the touch screen and image data; a feature extractor configured to extract a plurality of feature values from the driving state and the image data; and a touch processor configured to read a display noise value mapped to the plurality of feature values from the DNT, subtract the display noise value from the touch sensing value and generate a touch value.
    Type: Application
    Filed: May 12, 2021
    Publication date: December 23, 2021
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Changju LEE
  • Publication number: 20210350754
    Abstract: A backlight device includes LED elements divided into dimming groups; a panel driver configured to output a reference current for driving the LED elements; and pixel circuits, each of which is connected to the panel driver through a common line and is respectively configured to drive first LED elements comprised in a corresponding dimming group. Each of the pixel circuits is configured to: in a first period of a frame period, obtain a reference voltage based on the reference current and store the reference voltage, in a second period of the frame period, obtain luminance data of an image displayed by the corresponding dimming group, and in a third period of the frame period, drive the first LED elements during a light emitting time corresponding to the luminance data obtained in the second period using the reference voltage stored in the first period.
    Type: Application
    Filed: April 29, 2021
    Publication date: November 11, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Changju Lee, Yongil Kwon, Yoon-Kyung Choi, Junho Huh
  • Publication number: 20210349562
    Abstract: The present disclosure provides a touch and display control device with a touch screen controller and a display driver. The touch screen controller receives a touch sensing signal, generates touch raw data based on the touch sensing signal, and extracts touch information based on the touch raw data. The display driver receives an original image from a host processor, directly receives the touch information from the touch screen controller, generates touch trajectory information by accumulating the touch information, internally generates a touch image to be displayed with the original image based on the touch trajectory information, generates a composite image by synthesizing the original image and the touch image, and controls a display panel to display the composite image. The display driver includes a memory storing the touch trajectory information.
    Type: Application
    Filed: March 2, 2021
    Publication date: November 11, 2021
    Inventor: Changju Lee
  • Publication number: 20210117035
    Abstract: A touch display controller, panel and system may include a select circuit having a first selectable input terminal connected to touch sensors, a second selectable input terminal connected to display pixels, and an output terminal; and an analog front-end circuit coupled to the output terminal of the select circuit to receive a raw analog signal, and having a shared processing path for analog signals from both the touch sensors and the display pixels.
    Type: Application
    Filed: July 24, 2020
    Publication date: April 22, 2021
    Inventors: JINBONG KIM, Changju Lee, Yoonkyung Choi
  • Publication number: 20210065602
    Abstract: A display chipset structure that is based on an integrated display controller is provided. The display controller includes including a display processor comprising a first digital circuit, and configured to receive image data from an application processor (AP) and output the image data to a first component driver chip configured to drive a gate line and a source line of a display panel; and a touch processor comprising a second digital circuit, and configured to receive touch data from a second component driver chip configured to drive sensing electrodes of a touch panel. The display controller is implemented as one semiconductor chip and separated from each of the first and second component driver chips, and the display processor and the touch processor communicate with each other through an internal interconnection of the one semiconductor chip.
    Type: Application
    Filed: August 18, 2020
    Publication date: March 4, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Changju LEE, Yoonkyung Choi, Jinbong Kim, Junho Huh