Patents by Inventor Sang-Un Choi

Sang-Un 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).

  • Publication number: 20220186554
    Abstract: A fireproof shutter includes a frame having an opening through which a transport rail for movement of a transport vehicle passes, the opening being divided into an upper opening and a lower opening based on the transport rail, an upper door mounted on the frame and configured to open and close the upper opening, and a lower door mounted on the frame and configured to open and close the lower opening.
    Type: Application
    Filed: December 14, 2021
    Publication date: June 16, 2022
    Applicant: SEMES CO., LTD.
    Inventors: Jong Suk CHOI, Sang Hui LEE, Jung Un KIM, Myeong Jin BANG, Sang Wook KANG
  • Patent number: 11192878
    Abstract: The present disclosure relates to a novel piperidine-2,6-dione derivative and a use thereof and, more specifically, to a piperidine-2,6-dione derivative compound having a structure of a thalidomide analog. A compound of chemical formula 1 according to the present disclosure specifically binds with CRBN protein, and is involved in functions thereof. Therefore, the compound of the present disclosure can be favorably used in the prevention or treatment of leprosy, chronic graft versus host disease, an inflammatory disease, or cancer, which are caused by actions of CRBN protein.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: December 7, 2021
    Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
    Inventors: Jong Yeon Hwang, Jae Du Ha, Sung Yun Cho, Pil Ho Kim, Chang Soo Yun, Chi Hoon Park, Chong Ock Lee, Sang Un Choi, Joo Youn Lee, Sunjoo Ahn
  • Patent number: 11105677
    Abstract: An electronic device may be provided with a display. An optical component window may be formed in the inactive area of the display. The optical component window may transmit infrared light from an infrared light source. The infrared light source may include a diffuser to allow the light source to operate in a flood illumination mode and a structured light mode. The diffuser may include liquid crystal material between first and second substrates. A sealant may surround the liquid crystal layer, and one or more spacer walls may be located between the sealant and the liquid crystal layer. An additional spacer wall may be used outside of the sealant to prevent metal from creating an electrical short between electrodes in the diffuser. Conductive material in the sealant may be used to couple a top electrode to a metal pad on a bottom substrate.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: August 31, 2021
    Assignee: Apple Inc.
    Inventors: Junhwan Lim, Zhibing Ge, Christopher L. Boitnott, Shih-Wei Chang, Sang Un Choi, Sudirukkuge T. Jinasundera
  • Patent number: 10690970
    Abstract: A liquid crystal display may have main column spacers and subspacer column spacers. The column spacers may have cross shapes formed from overlapping perpendicular rectangular column spacer portions respectively located on a color filter layer and a thin-film transistor layer. The column spacers may have a hybrid configuration in which some of the rectangular portions on the thin-film transistor layer extend vertically and some extend horizontally. Column spacers may be formed from planarization layer material, may be formed from locally thickened portions of a planarization layer, and may have circular shapes.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: June 23, 2020
    Assignee: Apple Inc.
    Inventors: Chia Hsuan Tai, Cheng Chen, Da Yu, Enkhamgalan Dorjgotov, Sang Un Choi, Shih-Chyuan Fan Jiang, Tae Woon Cha, Yeon Sik Ham, Yuan Chen, Zhibing Ge, Hossein Nemati
  • Publication number: 20200062730
    Abstract: The present disclosure relates to a novel piperidine-2,6-dione derivative and a use thereof and, more specifically, to a piperidine-2,6-dione derivative compound having a structure of a thalidomide analog. A compound of chemical formula 1 according to the present disclosure specifically binds with CRBN protein, and is involved in functions thereof. Therefore, the compound of the present disclosure can be favorably used in the prevention or treatment of leprosy, chronic graft versus host disease, an inflammatory disease, or cancer, which are caused by actions of CRBN protein.
    Type: Application
    Filed: May 11, 2018
    Publication date: February 27, 2020
    Inventors: Jong Yeon HWANG, Jae Du HA, Sung Yun CHO, Pil Ho KIM, Chang Soo YUN, Chi Hoon PARK, Chong Ock LEE, Sang Un CHOI, Joo Youn LEE, Sunjoo AHN
  • Publication number: 20190137333
    Abstract: An electronic device may be provided with a display. An optical component window may be formed in the inactive area of the display. The optical component window may transmit infrared light from an infrared light source. The infrared light source may include a diffuser to allow the light source to operate in a flood illumination mode and a structured light mode. The diffuser may include liquid crystal material between first and second substrates. A sealant may surround the liquid crystal layer, and one or more spacer walls may be located between the sealant and the liquid crystal layer. An additional spacer wall may be used outside of the sealant to prevent metal from creating an electrical short between electrodes in the diffuser. Conductive material in the sealant may be used to couple a top electrode to a metal pad on a bottom substrate.
    Type: Application
    Filed: September 25, 2018
    Publication date: May 9, 2019
    Inventors: Junhwan Lim, Zhibing Ge, Christopher L. Boitnott, Shih-Wei Chang, Sang Un Choi, Sudirukkuge T. Jinasundera
  • Publication number: 20170293174
    Abstract: A liquid crystal display may have main column spacers and subspacer column spacers. The column spacers may have cross shapes formed from overlapping perpendicular rectangular column spacer portions respectively located on a color filter layer and a thin-film transistor layer. The column spacers may have a hybrid configuration in which some of the rectangular portions on the thin-film transistor layer extend vertically and some extend horizontally. Column spacers may be formed from planarization layer material, may be formed from locally thickened portions of a planarization layer, and may have circular shapes.
    Type: Application
    Filed: September 8, 2016
    Publication date: October 12, 2017
    Inventors: Chia Hsuan Tai, Cheng Chen, Da Yu, Enkhamgalan Dorjgotov, Sang Un Choi, Shih-Chyuan Fan Jiang, Tae Woon Cha, Yeon Sik Ham, Yuan Chen, Zhibing Ge, Hossein Nemati
  • Patent number: 9612470
    Abstract: A display may have a layer of liquid crystal material between a color filter layer and a thin-film transistor layer. Column spacer structures may be formed between the color filter layer and the thin-film transistor layer to maintain a desired separation between the color filter and thin-film transistor layers. Column spacers may be deposited in column spacer regions of the color filter layer. The color filter layer may include rows of red, green, and blue color filter elements. Blue color filter material that forms blue color filter elements in the color filter layer may also be used to form a planar surface over red and green color filter elements in the column spacer regions. Using the blue color filter material to planarize the surface on which column spacers are formed ensures that the column spacers provide sufficient support for the display without requiring an additional planarization layer.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: April 4, 2017
    Assignee: Apple Inc.
    Inventors: Sang Un Choi, Zhibing Ge, Shang-Chih Lin, Hiroshi Osawa, Ton-Yong Wang, Ming Xu
  • Patent number: 9482905
    Abstract: A display may have a color filter layer and a thin-film transistor layer. A layer of liquid crystal material may be located between the color filter layer and the thin-film transistor layer. Column spacers may be formed on the color filter layer to maintain a desired gap between the color filter and thin-film transistor layers. Support pads may be used to support the column spacers. The column spacers and support pads may have comparable thicknesses. Different column spacers may be located at different portions of the support pads to allow the support pad size to be reduced while ensuring adequate support.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: November 1, 2016
    Assignee: Apple Inc.
    Inventors: Zhibing Ge, Yeon Sik Ham, Cheng Chen, Chia Hsuan Tai, Enkhamgalan Dorjgotov, Sang Un Choi, Shih-Chyuan Fan Jiang
  • Patent number: 9403831
    Abstract: The present invention relates to a novel triazolopyrazine derivative or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition containing the same as an active ingredient for preventing or treating hyper proliferative disorder. The present invention can be useful as a therapeutic agent for various hyper proliferative disorders associated with excessive cell proliferation and growth caused by abnormal kinase activity, such as cancer, psoriasis, rheumatoid arthritis, and diabetic retinopathy, by efficiently inhibiting c-Met tyrosine kinase activity.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: August 2, 2016
    Assignees: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY, HANDOK INC.
    Inventors: Hee Jung Jung, Jae Du Ha, Sung Yun Cho, Hyoung Rae Kim, Kwang Ho Lee, Chong Ock Lee, Sang Un Choi, Chi Hoon Park
  • Publication number: 20150370115
    Abstract: A display may have a color filter layer and a thin-film transistor layer. A layer of liquid crystal material may be located between the color filter layer and the thin-film transistor layer. Column spacers may be formed on the color filter layer to maintain a desired gap between the color filter and thin-film transistor layers. Support pads may be used to support the column spacers. The column spacers and support pads may have comparable thicknesses. Different column spacers may be located at different portions of the support pads to allow the support pad size to be reduced while ensuring adequate support.
    Type: Application
    Filed: June 18, 2014
    Publication date: December 24, 2015
    Inventors: Zhibing Ge, Yeon Sik Ham, Cheng Chen, Chia Hsuan Tai, Enkhamgalan Dorjgotov, Sang Un Choi, Shih-Chyuan Fan Jiang
  • Patent number: 9199944
    Abstract: Disclosed herein are a new N2,N4-bis(4-(piperazin-1-yl)phenyl)pyrimidin-2,4-diamine derivative or a pharmaceutically acceptable salt thereof and a pharmaceutical composition for the prevention or treatment of cancers containing the same as an active ingredient. The compound of the present invention has excellent inhibitory effects against the activities of anaplastic lymphoma kinase (ALK) and activated cdc42-associated kinase (ACK1) and thus can improve the therapeutic effects on the treatment of cancer cells having anaplastic lymphoma kinase fusion proteins such as EML4-ALK and NPM-ALK, and also effectively prevent the recurrence of cancers thus being useful as a pharmaceutical composition for the prevention and treatment of cancers.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: December 1, 2015
    Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
    Inventors: Kwangho Lee, Hyoung Rae Kim, Chi Hoon Park, Chong Ock Lee, Jong Kook Lee, Hee Jung Jung, Sung Yun Cho, Chong Hak Chae, Sang Un Choi, Jae Du Ha
  • Publication number: 20150259350
    Abstract: The present invention relates to a novel triazolopyrazine derivative or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition containing the same as an active ingredient for preventing or treating hyper proliferative disorder. The present invention can be useful as a therapeutic agent for various hyper proliferative disorders associated with excessive cell proliferation and growth caused by abnormal kinase activity, such as cancer, psoriasis, rheumatoid arthritis, and diabetic retinopathy, by efficiently inhibiting c-Met tyrosine kinase activity.
    Type: Application
    Filed: September 30, 2013
    Publication date: September 17, 2015
    Inventors: Hee Jung Jung, Jae Du Ha, Sung Yun Cho, Hyoung Rae Kim, Kwang Ho Lee, Chong Ock Lee, Sang Un Choi, Chi Hoon Park
  • Publication number: 20150198844
    Abstract: A display may have a layer of liquid crystal material between a color filter layer and a thin-film transistor layer. Column spacer structures may be formed between the color filter layer and the thin-film transistor layer to maintain a desired separation between the color filter and thin-film transistor layers. Column spacers may be deposited in column spacer regions of the color filter layer. The color filter layer may include rows of red, green, and blue color filter elements. Blue color filter material that forms blue color filter elements in the color filter layer may also be used to form a planar surface over red and green color filter elements in the column spacer regions. Using the blue color filter material to planarize the surface on which column spacers are formed ensures that the column spacers provide sufficient support for the display without requiring an additional planarization layer.
    Type: Application
    Filed: August 29, 2014
    Publication date: July 16, 2015
    Inventors: Sang Un Choi, Zhibing Ge, Shang-Chih Lin, Hiroshi Osawa, Ton-Yong Wang, Ming Xu
  • Publication number: 20150152069
    Abstract: Disclosed herein are a new N2,N4-bis(4-(piperazin-1-yl)phenyl)pyrimidin-2,4-diamine derivative or a pharmaceutically acceptable salt thereof and a pharmaceutical composition for the prevention or treatment of cancers containing the same as an active ingredient. The compound of the present invention has excellent inhibitory effects against the activities of anaplastic lymphoma kinase (ALK) and activated cdc42-associated kinase (ACK1) and thus can improve the therapeutic effects on the treatment of cancer cells having anaplastic lymphoma kinase fusion proteins such as EML4-ALK and NPM-ALK, and also effectively prevent the recurrence of cancers thus being useful as a pharmaceutical composition for the prevention and treatment of cancers.
    Type: Application
    Filed: February 9, 2015
    Publication date: June 4, 2015
    Inventors: Kwangho LEE, Hyoung Rae KIM, Chi Hoon PARK, Chong Ock LEE, Jong Kook LEE, Hee Jung JUNG, Sung Yun CHO, Chong Hak CHAE, Sang Un CHOI, Jae Du HA
  • Patent number: 7279497
    Abstract: The present invention relates to benzopyran derivatives substituted with secondary amines including imidazole, their preparation, and pharmaceutical compositions containing them. The present invention is pharmacologically useful for the treatment of cancer, rheumatoid arthritis, and diabetic retinopathies through anti-angiogenic properties, and also pharmacologically useful in the protection of heart and neuronal cells against ischemia-reperfusion injury or preserving organs.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: October 9, 2007
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Kyu Yang Yi, Sun Kyung Lee, Sung-Eun Yoo, Jee Hee Suh, Nak Jeong Kim, Sun Kyung Hwang, Byung-Ho Lee, Ho Won Seo, Chong Ock Lee, Sang-Un Choi
  • Patent number: 7064348
    Abstract: A VVA-mode LCD having improved transmittance and response speed includes upper and lower substrates positioned to face each other with a predetermined distance between them; a liquid crystal layer having negative anisotropy of dielectric constant interposed between the upper and lower substrates; a color resin layer formed on the inner surface of the upper substrate and having a predetermined number of valleys regularly formed inside each unit pixel; a counter electrode formed on the color resin layer including the valleys; a pixel electrode formed on the inner surface of the lower substrate and having slits arranged about the valleys of the upper substrate in a “+” shape inside and around the valleys; and alignment layers interposed between the pixel electrode and the liquid crystal layer and between the counter electrode and the liquid crystal layer, respectively.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: June 20, 2006
    Assignee: Boe Hydis Technology Co., Ltd.
    Inventors: Sung Woon Kim, Sang Un Choi
  • Publication number: 20050267188
    Abstract: The present invention relates to benzopyran derivatives substituted with secondary amines including imidazole, their preparation, and pharmaceutical compositions containing them. The present invention is pharmacologically useful for the treatment of cancer, rheumatoid arthritis, and diabetic retinopathies through anti-angiogenic properties, and also pharmacologically useful in the protection of heart and neuronal cells against ischemia-reperfusion injury or preserving organs.
    Type: Application
    Filed: July 30, 2003
    Publication date: December 1, 2005
    Inventors: Kyu Yi, Sun Lee, Sung-Eun Yoo, Jee Suh, Nak Kim, Sun Hwang, Byung-Ho Lee, Ho Seo, Chong Lee, Sang-Un Choi
  • Patent number: 6943860
    Abstract: Disclosed is an LCD having liquid crystal molecules that lie at a predetermined direction around a valley formed in an upper substrate of the LCD in order to prevent creation of an unadjustable disclination line. The LCD comprises an upper substrate, a lower substrate and a plurality of slits formed in a pixel region of the lower substrate. Each of the slits has a minute distance to the adjacent one of the slits. A valley is formed in a color filter of the upper substrate covered with a transparent electrode, and has a predetermined angle with respect to the slits. Vertical alignment material is formed in opposite faces of the upper and lower substrates. A liquid crystal layer is injected between the upper and lower substrates. Polarizers are arranged in outer faces of the upper and lower substrates, and have transmission axes, which are perpendicular to each other.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: September 13, 2005
    Assignee: Boe Hydis Technology Co., Ltd.
    Inventors: Seung Ho Hong, Jung Ho Ma, Seong Wook Shin, Sang Un Choi
  • Patent number: 6909476
    Abstract: A color polymer dispersed liquid crystal display includes a lower substrate, an upper substrate, color liquid crystal-polymer films, and two transparent liquid crystal driving electrodes, among others. The color liquid crystal-polymer films are formed by foaming polymer films mixed with red, green and blue pigments to form porous films of red, green, and blue colors and then dropping and injecting liquid crystal into droplets of the porous films under vacuum condition. One of the two transparent liquid crystal driving electrodes is disposed between the lower substrate and the PDLC films, and the other is disposed between the PDLC films and the upper substrate. The changes in properties of the PDLC films, which may be caused by unstable phase separation in a conventional phase separation process, are reduced, and the colors are improved.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: June 21, 2005
    Assignee: BOE-HYDIS Technology Co., Ltd.
    Inventors: Soo Young Choi, Sang Un Choi, Hoan Su Shim, Sung Woon Kim