Patents by Inventor Ji-han Kim

Ji-han Kim 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: 20250124872
    Abstract: A pixel module comprises a scan driver to output first signals, a data driver to output second signals, and a plurality of pixel circuits for driving an LED with PWM signals. Each pixel circuit comprises a first memory configured to store image data to drive the light-emitting diode, a second memory configured to store charging control data indicating charging timings or a number of charging times of a capacitor, and a PWM pixel driver comprising the capacitor configured to be chargeable when a supply of a bias voltage is turned on based on the charging control data, a charge controller configured to output a charging control signal according to the charging control data, and a PWM control element configured to control a power supply to the light-emitting diode, wherein the second signals transmit the image data to the first memory and the charging control data to the second memory.
    Type: Application
    Filed: November 8, 2024
    Publication date: April 17, 2025
    Applicant: SAPIEN SEMICONDUCTORS INC.
    Inventors: Ji Han KIM, Jin Woong JANG, Ji Haeng LEE, Dae Young JUNG, Jong Gu JEON
  • Patent number: 12183269
    Abstract: A display apparatus is capable of improving a dynamic false contour. The display apparatus may control to change an order of a plurality of pulses of which widths are modulated for an emission time set within one frame, or divide pulses corresponding to the most significant bit (MSB) and the second significant bit (MSB-1) of image data among the pulses into two or more sub-pulses, and output the sub-pulses.
    Type: Grant
    Filed: August 11, 2023
    Date of Patent: December 31, 2024
    Assignee: SAPIEN Semiconductors Inc.
    Inventors: Ji Haeng Lee, Jin Woong Jang, Ji Han Kim, Dae Young Jung, Jong Gu Jeon, Do Kyung Kim
  • Patent number: 12175937
    Abstract: Provided is a pixel driving circuit capable of reducing power consumed for pixel driving by reducing the number of times a capacitor is charged. The pixel driving circuit includes: a video memory configured to store video data related to driving of a plurality of light-emitting devices; a plurality of sub-pixel driving units, respectively corresponding to the plurality of light-emitting devices, configured to supply power to the plurality of light-emitting devices according to the video data stored in the video memory, each of the plurality of sub-pixel driving units having a capacitor unit for charging power required for driving each of the plurality of light-emitting devices; a charge control memory configured to store data related to charging of the capacitor unit; and a charge controller configured to control whether the capacitor unit is charged according to charge control data stored in the charge control memory.
    Type: Grant
    Filed: October 16, 2023
    Date of Patent: December 24, 2024
    Assignee: SAPIEN Semiconductors Inc.
    Inventors: Ji Han Kim, Jin Woong Jang, Ji Haeng Lee, Dae Young Jung, Jong Gu Jeon
  • Patent number: 12136385
    Abstract: A pixel driving circuit includes a memory unit including a data memory and a register and storing data related to driving of a luminous element, a driver supplying electrical power to the luminous element based on data stored in the memory unit, and a reset unit controlling reset of the memory unit, wherein the reset unit generates a first reset signal for controlling reset of the data memory and a second reset signal for controlling reset of the register.
    Type: Grant
    Filed: July 14, 2023
    Date of Patent: November 5, 2024
    Assignee: SAPIEN Semiconductors Inc.
    Inventors: Ji Han Kim, Sung Ho Hwang, Ji Haeng Lee, Dae Young Jung, Jong Gu Jeon
  • Patent number: 12112699
    Abstract: The present specification discloses a pixel driving circuit having a reduced number of external contacts. A conventional digital driving pixel requires two contacts (Vcc, GND) related to power, a contact (row signal, column signal) for inputting two signals for digital driving, a contact (mode selection) for inputting a set value required for driving the pixel, and a contact (reset) for maintaining video data for one frame to implement a cycle function during PWM driving and for inputting a reset signal to clear previous video data before inputting new video data. However, the higher the number of contacts, the lower the efficiency of pick & place in the manufacturing process. Thus, in the present specification, a pixel driving circuit is proposed, which can be digitally driven even when the number of contacts is reduced through combination of a row signal and a column signal.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: October 8, 2024
    Assignee: SAPIEN Semiconductors Inc.
    Inventors: Jae Hoon Lee, Ji Han Kim
  • Patent number: 12112667
    Abstract: A pixel driving circuit includes a memory unit storing data based on a first signal and a second signal, a driver connected to a luminous element and supplying electric power to the luminous element based on the data stored in the memory unit, and a test controller controlling entry into a test mode in which it is tested whether the pixel driving circuit is defective, wherein the test controller generates a test mode activation signal based on the first signal and the second signal.
    Type: Grant
    Filed: August 7, 2023
    Date of Patent: October 8, 2024
    Assignee: SAPIEN Semiconductors Inc.
    Inventors: Ji Han Kim, Sung Ho Hwang, Ji Haeng Lee, Dae Young Jung
  • Patent number: 11922860
    Abstract: Provided is a pixel driving circuit including a first circuit configured to control, in a data writing mode, a signal related to driving of one or more light-emitting elements, and a second circuit configured to supply, in a driving mode, power to the one or more light-emitting elements based on a signal transmitted from the first circuit.
    Type: Grant
    Filed: September 16, 2022
    Date of Patent: March 5, 2024
    Assignee: Sapien Semiconductors Inc.
    Inventors: Sung Ho Hwang, Ji Han Kim, Ji Haeng Lee, Hye Min Bae, Dae Young Jung
  • Publication number: 20240054928
    Abstract: A pixel driving circuit includes a memory unit storing data based on a first signal and a second signal, a driver connected to a luminous element and supplying electric power to the luminous element based on the data stored in the memory unit, and a test controller controlling entry into a test mode in which it is tested whether the pixel driving circuit is defective, wherein the test controller generates a test mode activation signal based on the first signal and the second signal.
    Type: Application
    Filed: August 7, 2023
    Publication date: February 15, 2024
    Applicant: Sapien Semiconductors Inc.
    Inventors: Ji Han KIM, Sung Ho HWANG, Ji Haeng LEE, Dae Young JUNG
  • Publication number: 20240054944
    Abstract: A pixel driving circuit includes a memory unit including a data memory and a register and storing data related to driving of a luminous element, a driver supplying electrical power to the luminous element based on data stored in the memory unit, and a reset unit controlling reset of the memory unit, wherein the reset unit generates a first reset signal for controlling reset of the data memory and a second reset signal for controlling reset of the register.
    Type: Application
    Filed: July 14, 2023
    Publication date: February 15, 2024
    Applicant: Sapien Semiconductor Inc.
    Inventors: Ji Han KIM, Sung Ho HWANG, Ji Haeng LEE, Dae Young JUNG, Jong Gu JEON
  • Publication number: 20240038173
    Abstract: Provided is a pixel driving circuit capable of reducing power consumed for pixel driving by reducing the number of times a capacitor is charged. The pixel driving circuit includes: a video memory configured to store video data related to driving of a plurality of light-emitting devices; a plurality of sub-pixel driving units, respectively corresponding to the plurality of light-emitting devices, configured to supply power to the plurality of light-emitting devices according to the video data stored in the video memory, each of the plurality of sub-pixel driving units having a capacitor unit for charging power required for driving each of the plurality of light-emitting devices; a charge control memory configured to store data related to charging of the capacitor unit; and a charge controller configured to control whether the capacitor unit is charged according to charge control data stored in the charge control memory.
    Type: Application
    Filed: October 16, 2023
    Publication date: February 1, 2024
    Applicant: SAPIEN SEMICONDUCTORS INC.
    Inventors: Ji Han KIM, Jin Woong Jang, Ji Haeng Lee, Dae Young Jung, Jong Gu Jeon
  • Publication number: 20230395021
    Abstract: The present specification discloses a pixel driving circuit having a reduced number of external contacts. A conventional digital driving pixel requires two contacts (Vcc, GND) related to power, a contact (row signal, column signal) for inputting two signals for digital driving, a contact (mode selection) for inputting a set value required for driving the pixel, and a contact (reset) for maintaining video data for one frame to implement a cycle function during PWM driving and for inputting a reset signal to clear previous video data before inputting new video data. However, the higher the number of contacts, the lower the efficiency of pick & place in the manufacturing process. Thus, in the present specification, a pixel driving circuit is proposed, which can be digitally driven even when the number of contacts is reduced through combination of a row signal and a column signal.
    Type: Application
    Filed: December 2, 2021
    Publication date: December 7, 2023
    Applicant: SAPIEN SEMICONDUCTORS INC.
    Inventors: Jae Hoon LEE, Ji Han KIM
  • Publication number: 20230386400
    Abstract: A display apparatus is capable of improving a dynamic false contour. The display apparatus may control to change an order of a plurality of pulses of which widths are modulated for an emission time set within one frame, or divide pulses corresponding to the most significant bit (MSB) and the second significant bit (MSB-1) of image data among the pulses into two or more sub-pulses, and output the sub-pulses.
    Type: Application
    Filed: August 11, 2023
    Publication date: November 30, 2023
    Applicant: SAPIEN SEMICONDUCTORS INC.
    Inventors: Ji Haeng LEE, Jin Woong JANG, Ji Han KIM, Dae Young JUNG, Jong Gu JEON, Do Kyung KIM
  • Publication number: 20230360587
    Abstract: Provided is a pixel driving circuit including a first circuit configured to control, in a data writing mode, a signal related to driving of one or more light-emitting elements, and a second circuit configured to supply, in a driving mode, power to the one or more light-emitting elements based on a signal transmitted from the first circuit.
    Type: Application
    Filed: September 16, 2022
    Publication date: November 9, 2023
    Applicant: Sapien Semiconductors Inc.
    Inventors: Sung Ho HWANG, Ji Han Kim, Ji Haeng Lee, Hye Min Bae, Dae Young Jung
  • Patent number: 11776462
    Abstract: A display apparatus is capable of improving a dynamic false contour. The display apparatus may control to change an order of a plurality of pulses of which widths are modulated for an emission time set within one frame, or divide pulses corresponding to the most significant bit (MSB) and the second significant bit (MSB-1) of image data among the pulses into two or more sub-pulses, and output the sub-pulses.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: October 3, 2023
    Assignee: SAPIEN SEMICONDUCTORS INC.
    Inventors: Ji Haeng Lee, Jin Woong Jang, Ji Han Kim, Dae Young Jung, Jong Gu Jeon, Do Kyung Kim
  • Publication number: 20230295158
    Abstract: The present invention provides a method for preparing a compound as a PI3K inhibitor with reduced process steps, including a process that has a shortened reaction time in the preparation of the compound as a PI3K inhibitor, and enabling reaction in mild conditions. Accordingly, the present invention provides a method for preparing a compound as a PI3K inhibitor, which is easy in process management and industrial mass-production while achieving process simplification, compared to existing known preparation methods.
    Type: Application
    Filed: June 29, 2021
    Publication date: September 21, 2023
    Inventors: Yong Ho SUN, Ok Kyoung CHOI, Joon Kwang LEE, Ji Han KIM
  • Publication number: 20230290304
    Abstract: Provided is a pixel driving circuit capable of reducing power consumed for pixel driving by reducing the number of times a capacitor is charged. The pixel driving circuit includes: a video memory configured to store video data related to driving of a plurality of light-emitting devices; a plurality of sub-pixel driving units, respectively corresponding to the plurality of light-emitting devices, configured to supply power to the plurality of light-emitting devices according to the video data stored in the video memory, each of the plurality of sub-pixel driving units having a capacitor unit for charging power required for driving each of the plurality of light-emitting devices; a charge control memory configured to store data related to charging of the capacitor unit; and a charge controller configured to control whether the capacitor unit is charged according to charge control data stored in the charge control memory.
    Type: Application
    Filed: June 29, 2022
    Publication date: September 14, 2023
    Applicant: Sapien Semiconductors Inc.
    Inventors: Ji Han Kim, Jin Woong Jang, Ji Haeng Lee, Dae Young Jung, Jong Gu Jeon
  • Publication number: 20220415245
    Abstract: A display apparatus is capable of improving a dynamic false contour. The display apparatus may control to change an order of a plurality of pulses of which widths are modulated for an emission time set within one frame, or divide pulses corresponding to the most significant bit (MSB) and the second significant bit (MSB-1) of image data among the pulses into two or more sub-pulses, and output the sub-pulses.
    Type: Application
    Filed: March 22, 2022
    Publication date: December 29, 2022
    Applicant: SAPIEN SEMICONDUCTORS INC.
    Inventors: Ji Haeng LEE, Jin Woong JANG, Ji Han KIM, Dae Young JUNG, Jong Gu JEON, Do Kyung KIM
  • Publication number: 20220227759
    Abstract: The present invention relates to an amorphous PI3K inhibitor and a pharmaceutical composition comprising same. According to the present invention, a novel amorphous PI3K inhibitor having improved solubility and bioavailability and excellent stability and a pharmaceutical composition comprising same can be provided.
    Type: Application
    Filed: May 8, 2020
    Publication date: July 21, 2022
    Inventors: Seong Heon KIM, Joon Kwang LEE, Yong Ho SUN, Ji Han KIM
  • Patent number: 11386579
    Abstract: Disclosed is a context-aware real-time spatial intelligence provision system that estimates the locations of persons or things captured in a video by extracting objects representative of the persons and the things from the video captured by viewing a real space and placing the extracted objects in a virtual space to which a digital twin technique is applied. The disclosed context-aware real-time spatial intelligence provision system allows people to keep the distance between each other indoors, thereby preventing the spread of an infectious disease such as COVID-19.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: July 12, 2022
    Assignee: CORNERS CO., LTD.
    Inventors: Tony Kim, James Choi, Seung Sik Yoon, Ji Han Kim
  • Publication number: 20220204502
    Abstract: The present invention relates to a novel crystal polymorphism of a P13K inhibitor, and a method for preparing same. The novel crystal form of the present invention has remarkably superior non-hygroscopicity, can exhibit a superior pharmacological effect due to high blood levels, and exhibits high bioavailability, and thus is suitable for pharmaceutical formulations.
    Type: Application
    Filed: May 8, 2020
    Publication date: June 30, 2022
    Inventors: Seong Heon KIM, Joon Kwang LEE, Yong Ho SUN, Ji Han KIM