Patents by Inventor Gyu Dong CHOI
Gyu Dong 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).
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Publication number: 20240152585Abstract: A user access control method for an information system is proposed. The method may include processing login of a user using the information system, and acquiring a reference image obtained by capturing the logged-in user on the basis of a login time. The method may also include extracting reference feature information from the reference image and storing the reference feature information, and acquiring target images obtained by capturing a user using the information system at predetermined intervals. The method may further include extracting each target feature information from each target image; comparing each target feature information with the reference feature information to confirm whether or not each user using the information system at predetermined intervals is the same as the logged-in user, and controlling an access for the each user using the information system when the each user using the information system is not the same as the logged-in user.Type: ApplicationFiled: October 24, 2023Publication date: May 9, 2024Inventors: Gyu Dong PARK, Ho Cheol JEON, Jong Oh KIM, Hyoek Jin CHOI
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Publication number: 20240130199Abstract: A display device includes a first substrate and a second substrate facing each other; and a filling layer disposed between the first substrate and the second substrate. The first substrate comprises a support substrate comprising a display area in which emission areas associated with sub-pixels, are arranged; a light-emitting element layer disposed on one surface of the support substrate; and an encapsulation layer disposed on the light-emitting element layer. The encapsulation layer comprises a first inorganic layer covering the light-emitting element layer; an organic layer disposed on the first inorganic layer and overlapping the light-emitting element layer; and a second inorganic layer disposed on the first inorganic layer and covering the organic layer. A thickness of the first inorganic layer is smaller than a thickness of the second inorganic layer.Type: ApplicationFiled: June 19, 2023Publication date: April 18, 2024Inventors: Gyu Min KIM, Jong Oh KIM, Jong Hyun PARK, Min Soo SEOL, Hee Dong CHOI, Tae Young HAM
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Publication number: 20230283375Abstract: Disclosed are a photonic multiband filter and a method of operating the same. The photonic multiband filter includes an optical frequency comb that forms multiple optical channels based on a single light source incident from an outside, a modulator that applies an RF signal modulated into an optical domain among a plurality of RF signals to the multiple optical channels, and a pulse shaper that determines a center frequency, a bandwidth, and a passband shape of the RF signal modulated into the optical domain including the multiple optical channels.Type: ApplicationFiled: December 15, 2022Publication date: September 7, 2023Inventors: Minhyup SONG, Hyun Jong CHOI, Minje SONG, Gyu Dong CHOI, Taehyun LEE, SEUNGYOUNG LIM
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Patent number: 11668801Abstract: A LIDAR system is provided. The LIDAR system includes: a light transmitting unit configured to drive a plurality of light emitting elements by light emitting units to irradiate light to different positions of a target object; and a light receiving unit configured to detect light that is reflected at different positions of the target object and then is incident to different light receiving positions through a plurality of light receiving regions.Type: GrantFiled: September 18, 2019Date of Patent: June 6, 2023Assignee: Electronics and Telecommunications Research InstituteInventors: Bongki Mheen, Hong-Seok Seo, Gyu Dong Choi
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Patent number: 11217958Abstract: A semiconductor laser diode light source package includes: a seed light source for outputting signal beams; a pump beam source for outputting pump beams; and at least one mirror for transmitting the signal beams to a core of an output optical fiber and transmitting the pump beams to first cladding of the output optical fiber, wherein the seed light source, the pump beam source, and the at least one mirror are realized in a semiconductor chip, and the output optical fiber is connected to an end terminal of the semiconductor laser diode light source package.Type: GrantFiled: October 31, 2018Date of Patent: January 4, 2022Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hong-Seok Seo, Bongki Mheen, Gyu Dong Choi
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Publication number: 20200088850Abstract: A LIDAR system is provided. The LIDAR system includes: a light transmitting unit configured to drive a plurality of light emitting elements by light emitting units to irradiate light to different positions of a target object; and a light receiving unit configured to detect light that is reflected at different positions of the target object and then is incident to different light receiving positions through a plurality of light receiving regions.Type: ApplicationFiled: September 18, 2019Publication date: March 19, 2020Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Bongki MHEEN, Hong-Seok SEO, Gyu Dong CHOI
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Patent number: 10408924Abstract: There are provided an optical receiver and a laser radar including the same. The optical receiver includes a plurality of optical detecting units configured to convert an optical signal reflected from a target into an electrical signal and to output the electrical signal, a signal combiner configured to combine output signals of the plurality of light detecting regions, a plurality of switches provided between the plurality of optical detecting units and the signal combiner, and a controller configured to control the plurality of switches so that the plurality of optical detecting units are selectively connected to the signal combiner based on whether the optical signal to reflected from the target is input. Therefore, it is possible to make a module small, to improve stability and reliability, and to reduce a signal to noise ratio.Type: GrantFiled: October 21, 2016Date of Patent: September 10, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Bongki Mheen, Hong-Seok Seo, Min Hyup Song, Gyu Dong Choi
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Publication number: 20190181605Abstract: A semiconductor laser diode light source package includes: a seed light source for outputting signal beams; a pump beam source for outputting pump beams; and at least one mirror for transmitting the signal beams to a core of an output optical fiber and transmitting the pump beams to first cladding of the output optical fiber, wherein the seed light source, the pump beam source, and the at least one mirror are realized in a semiconductor chip, and the output optical fiber is connected to an end terminal of the semiconductor laser diode light source package.Type: ApplicationFiled: October 31, 2018Publication date: June 13, 2019Inventors: Hong-Seok SEO, Bongki MHEEN, Gyu Dong CHOI
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Patent number: 9905987Abstract: A laser radar system includes a first light source unit including a signal light source—a seed laser diode or a light source for amplifying a laser beam from the seed laser diode—and a pump laser diode, a second light source unit disposed to be spaced apart from the first light source unit, the second light source unit including an optical amplifier for amplifying a signal output from the first light source unit, and an optical connector for connecting the first light source unit and the second light source unit to each other, wherein the second light source unit is disposed at an end of a laser transceiver unit of the laser radar system.Type: GrantFiled: August 15, 2016Date of Patent: February 27, 2018Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hong-Seok Seo, Bong Ki Mheen, Min Hyup Song, Gyu Dong Choi
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Publication number: 20170293020Abstract: Provided is a scanning device including a transmission module configured to divide a scan target into a plurality of scan areas and alternately irradiate a first laser light and a second laser light to the scan areas that are sequentially arranged, a reception module configured to receive laser lights reflected from each of the scan areas, and an image generation module configured to generate divided images of each of the scan areas by using the reflected laser lights and generate a whole image of the scan target based on the divided images and an edge component of the reflected laser lights, wherein the transmission module is configured to trigger a rising edge of a trigger signal to generate the first laser light and trigger a falling edge of the trigger signal to generate the second laser light.Type: ApplicationFiled: April 3, 2017Publication date: October 12, 2017Applicant: Electronics and Telecommunications Research InstituteInventors: Min Hyup SONG, Bong Ki MHEEN, Hong-Seok SEO, Gyu Dong CHOI
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Publication number: 20170261371Abstract: There are provided an optical receiver and a laser radar including the same. The optical receiver includes a plurality of optical detecting units configured to convert an optical signal reflected from a target into an electrical signal and to output the electrical signal, a signal combiner configured to combine output signals of the plurality of light detecting regions, a plurality of switches provided between the plurality of optical detecting units and the signal combiner, and a controller configured to control the plurality of switches so that the plurality of optical detecting units are selectively connected to the signal combiner based on whether the optical signal to reflected from the target is input. Therefore, it is possible to make a module small, to improve stability and reliability, and to reduce a signal to noise ratio.Type: ApplicationFiled: October 21, 2016Publication date: September 14, 2017Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTIT UTEInventors: Bongki MHEEN, Hong-Seok SEO, Min Hyup SONG, Gyu Dong CHOI
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Publication number: 20170264069Abstract: A laser radar system includes a first light source unit including a signal light source —a seed laser diode or a light source for amplifying a laser beam from the seed laser diode —and a pump laser diode, a second light source unit disposed to be spaced apart from the first light source unit, the second light source unit including an optical amplifier for amplifying a signal output from the first light source unit, and an optical connector for connecting the first light source unit and the second light source unit to each other, wherein the second light source unit is disposed at an end of a laser transceiver unit of the laser radar system.Type: ApplicationFiled: August 15, 2016Publication date: September 14, 2017Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hong-Seok SEO, Bong Ki MHEEN, Min Hyup SONG, Gyu Dong CHOI
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Publication number: 20170264878Abstract: Provided herein is a scanning device including a transmitting module dividing a subject into a plurality of image regions and emitting laser beam onto the plurality of image regions by an interlaced method, a receiving module receiving reflected laser beam from the subject, and a signal processing module scanning a shape of the subject by a Time Of Flight (TOF) technique based on the reflected laser beam, wherein the signal processing module generates a single image with respect to the shape of the subject by overlapping subframes generated by the interlaced method.Type: ApplicationFiled: July 12, 2016Publication date: September 14, 2017Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Min Hyup SONG, Bong Ki MHEEN, Hong-Seok SEO, Gyu Dong CHOI
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Patent number: 9733344Abstract: Provided herein a laser radar apparatus including a plurality of light transmission and reception modules arranged concavely in an opposite direction to a scanning direction based on a surface vertical to the scanning direction, wherein each of the plurality of light transmission and reception modules comprises a transmitter configured to deflect a laser beam and to irradiate the deflected laser beam to a target; and a receiver configured to receive the laser beam reflected from the target.Type: GrantFiled: October 17, 2014Date of Patent: August 15, 2017Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jae Sik Sim, Ki Soo Kim, Bong Ki Mheen, Myoung Sook Oh, Hong Seok Seo, Jung Ho Song, Yong Hwan Kwon, Dong Sun Kim, Min Hyup Song, Gyu Dong Choi
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Publication number: 20150381845Abstract: Disclosed is an apparatus for obtaining an image. The apparatus for obtaining an image includes a light source, a scanner, a first beam splitter, and a light receiving unit. The light source generates a laser pulse. The scanner irradiates the laser pulse in a first direction. The first beam splitter splits the laser pulse irradiated in the first direction in the first direction and a second direction and irradiates the split laser pulse. The light receiving unit detects reflected light. Accordingly, it is possible to irradiate light to a wide range by a light source having a relatively small divergent angle.Type: ApplicationFiled: February 12, 2015Publication date: December 31, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jung Ho SONG, Myoung Sook OH, Ki Soo KIM, Bong Ki MHEEN, Jae Sik SIM, Yong Hwan KWON, Min Hyup SONG, Gyu Dong CHOI
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Publication number: 20150372447Abstract: Provided herein is a pulse laser generator including a modulator configured to receive a continuous wave laser, and to modulate an intensity and phase of the continuous wave laser to generate a first pulse laser; and a chirping unit configured to chirp the first pulse laser to generate a second pulse laser.Type: ApplicationFiled: June 5, 2015Publication date: December 24, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Min Hyup SONG, Bong Ki MHEEN, Hong Seok SEO, Yong Hwan KWON, Ki Soo KIM, Dong Sun KIM, Jung Ho SONG, Jae Sik SIM, Gyu Dong CHOI
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Publication number: 20150146190Abstract: Provided herein a laser radar apparatus including a plurality of light transmission and reception modules arranged concavely in an opposite direction to a scanning direction based on a surface vertical to the scanning direction, wherein each of the plurality of light transmission and reception modules comprises a transmitter configured to deflect a laser beam and to irradiate the deflected laser beam to a target; and a receiver configured to receive the laser beam reflected from the target.Type: ApplicationFiled: October 17, 2014Publication date: May 28, 2015Applicant: Electronics and Telecommunications Research InstituteInventors: Jae Sik SIM, Ki Soo KIM, Bong Ki MHEEN, Myoung Sook OH, Hong Seok SEO, Jung Ho SONG, Yong Hwan KWON, Dong Sun KIM, Min Hyup SONG, Gyu Dong CHOI