Patents by Inventor Woo-Jae Choi

Woo-Jae Choi 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).

  • Patent number: 11932618
    Abstract: Disclosed are novel compounds of Chemical Formula 1, optical isomers of the compounds, and pharmaceutically acceptable salts of the compounds or the optical isomers. The compounds, isomers, and salts exhibit excellent activity as GLP-1 receptor agonists. In particular, they, as GLP-1 receptor agonists, exhibit excellent glucose tolerance, thus having a great potential to be used as therapeutic agents for metabolic diseases. Moreover, they exhibit excellent pharmacological safety for cardiovascular systems.
    Type: Grant
    Filed: March 13, 2023
    Date of Patent: March 19, 2024
    Assignee: ILDONG PHARMACEUTICAL CO., LTD.
    Inventors: Hong Chul Yoon, Kyung Mi An, Myong Jae Lee, Jin Hee Lee, Jeong-geun Kim, A-rang Im, Woo Jin Jeon, Jin Ah Jeong, Jaeho Heo, Changhee Hong, Kyeojin Kim, Jung-Eun Park, Te-ik Sohn, Changmok Oh, Da Hae Hong, Sung Wook Kwon, Jung Ho Kim, Jae Eui Shin, Yeongran Yoo, Min Whan Chang, Eun Hye Jang, In-gyu Je, Ji Hye Choi, Gunhee Kim, Yearin Jun
  • Publication number: 20210254966
    Abstract: An inspection apparatus for inspecting the appearance of an inspection target object is provided. The inspection apparatus according to one embodiment of the present disclosure includes a support part configured to hold an inspection target object such that a side surface of the inspection target object faces a predetermined direction, a light source configured to irradiate light toward the inspection target object, a diffusion reflector configured to diffusely reflect at least a part of the irradiated light to irradiate the reflected light to the side surface of the inspection target object, and at least one inspection part configured to inspect the inspection target object by receiving the light reflected from the inspection target object and the diffusion reflector.
    Type: Application
    Filed: November 15, 2018
    Publication date: August 19, 2021
    Applicant: KOH YOUNG TECHNOLOGY INC.
    Inventors: Jung HUR, Woo Jae CHOI
  • Patent number: 10883824
    Abstract: Disclosed are a pattern light irradiating device and an inspection apparatus using the same. The pattern light irradiating device includes first and second pattern light sources installed on a frame having a plurality of through-holes. Each of the through-holes is formed along a single optical axis. The first pattern light source is configured to irradiate first pattern light having a fixed pitch. The second pattern light source is configured to irradiate second pattern light having a variable pitch.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: January 5, 2021
    Assignee: KOH YOUNG TECHNOLOGY INC.
    Inventors: Jung Hur, Woo Jae Choi
  • Publication number: 20190265025
    Abstract: Disclosed are a pattern light irradiating device and an inspection apparatus using the same. The pattern light irradiating device includes first and second pattern light sources installed on a frame having a plurality of through-holes. Each of the through-holes is formed along a single optical axis. The first pattern light source is configured to irradiate first pattern light having a fixed pitch. The second pattern light source is configured to irradiate second pattern light having a variable pitch.
    Type: Application
    Filed: October 23, 2017
    Publication date: August 29, 2019
    Applicant: KOH YOUNG TECHNOLOGY INC.
    Inventors: Jung HUR, Woo Jae CHOI
  • Patent number: 8295424
    Abstract: A data receiving apparatus and method includes a current-voltage conversion block, which receives a current-type transmit signal including data and a clock signal inserted into the data at a different level from the data, and then converts the received signal into at least one first voltage and at least one second voltage having a different level from the first voltage, and a comparison block, which makes a comparison between the first and second voltages, and then outputs the received signal as one of the data and the clock signal based on a result of the comparison. The data receiving apparatus can easily recover a clock signal while exhibiting better characteristics during the recovery of the clock signal because it is insensitive to a variation in reference voltage and a variation in current at the transmitting state of the timing controller, which are caused by a process variation.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: October 23, 2012
    Assignee: Dongbu HiTek Co., Ltd.
    Inventors: Woo Jae Choi, Sang Ho Woo, Mi Youn Kim
  • Patent number: 8253715
    Abstract: A source driver and a liquid crystal display (LCD) device having the same. A source driver may carry a clock in a data current, and may recover a clock signal and/or a data signal without being substantially affected by external frequencies and/or resistance. A source driver may include a trans-impedance amplifier which may receive data currents, convert data currents into voltages, and/or output voltages as data voltages and/or clock voltages. A source driver may include a comparator electrically coupled to a trans-impedance amplifier, which may change levels of data and/or clock voltages applied from a trans-impedance amplifier, and/or may output level-changed voltages as data signals and/or a clock signal.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: August 28, 2012
    Assignee: Dongbu HiTek Co., Ltd.
    Inventors: Woo-Jae Choi, Jong-Kee Kim, Kyoo-Joon Lee
  • Patent number: 7876130
    Abstract: A data transmitting device and a data receiving device are disclosed. The data transmitting device may include a clock signal generator for generating a clock signal, and a transmitter for generating a transmission signal having the clock signal inserted in a data signal, wherein the clock signal has only a single differential element, and the data signal has two differential elements with an amplitude identical to an amplitude of the clock signal. The clock signal may be embedded and the clock signal may be restored by using the common element of the data signal without any auxiliary reference voltage. As a result, only the data signal line may be used between the data transmitting device and the data receiving device, to reduce the number of transmitting lines. Furthermore, the data transmitting and receiving devices according to embodiments will not need a reference voltage. As a result, the clock signal may be restored smoothly even if the size of the data signal is changing.
    Type: Grant
    Filed: December 27, 2009
    Date of Patent: January 25, 2011
    Assignee: Dongbu HiTek Co., Ltd.
    Inventors: Kyoo-Joon Lee, Dae-Joong Jang, Woo-Jae Choi
  • Publication number: 20100166129
    Abstract: A data transmitting device and a data receiving device are disclosed. The data transmitting device may include a clock signal generator for generating a clock signal, and a transmitter for generating a transmission signal having the clock signal inserted in a data signal, wherein the clock signal has only a single differential element, and the data signal has two differential elements with an amplitude identical to an amplitude of the clock signal. The clock signal may be embedded and the clock signal may be restored by using the common element of the data signal without any auxiliary reference voltage. As a result, only the data signal line may be used between the data transmitting device and the data receiving device, to reduce the number of transmitting lines. Furthermore, the data transmitting and receiving devices according to embodiments will not need a reference voltage. As a result, the clock signal may be restored smoothly even if the size of the data signal is changing.
    Type: Application
    Filed: December 27, 2009
    Publication date: July 1, 2010
    Inventors: Kyoo-Joon Lee, Dae-Joong Jang, Woo-Jae Choi
  • Publication number: 20100166117
    Abstract: A data receiving apparatus and method includes a current-voltage conversion block, which receives a current-type transmit signal including data and a clock signal inserted into the data at a different level from the data, and then converts the received signal into at least one first voltage and at least one second voltage having a different level from the first voltage, and a comparison block, which makes a comparison between the first and second voltages, and then outputs the received signal as one of the data and the clock signal based on a result of the comparison. The data receiving apparatus can easily recover a clock signal while exhibiting better characteristics during the recovery of the clock signal because it is insensitive to a variation in reference voltage and a variation in current at the transmitting state of the timing controller, which are caused by a process variation.
    Type: Application
    Filed: December 29, 2009
    Publication date: July 1, 2010
    Inventors: Woo Jae Choi, Sang Ho Woo, Mi Youn Kim
  • Publication number: 20100110064
    Abstract: A source driver and a liquid crystal display (LCD) device having the same. A source driver may carry a clock in a data current, and may recover a clock signal and/or a data signal without being substantially affected by external frequencies and/or resistance. A source driver may include a trans-impedance amplifier which may receive data currents, convert data currents into voltages, and/or output voltages as data voltages and/or clock voltages. A source driver may include a comparator electrically coupled to a trans-impedance amplifier, which may change levels of data and/or clock voltages applied from a trans-impedance amplifier, and/or may output level-changed voltages as data signals and/or a clock signal.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 6, 2010
    Applicant: Dongbu HiTek Co., Ltd.
    Inventors: Woo-Jae Choi, Jong-Kee Kim, Kyoo-Joon Lee
  • Publication number: 20090147030
    Abstract: A liquid crystal display (LCD) driver integrated circuit (IC) is provided. The LCD driver IC, according to an embodiment, can include gamma reference buffers built in respective source drivers, where an output connection resistance is provided for connecting an output of a gamma reference buffer of one source driver to an output of a gamma reference buffer of another source driver.
    Type: Application
    Filed: October 28, 2008
    Publication date: June 11, 2009
    Inventors: Woo Jae Choi, Jong Kee Kim, Mi Youn Kim