Patents by Inventor Bongki Mheen
Bongki Mheen 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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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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Publication number: 20220231475Abstract: Disclosed is a laser radar device, which includes a signal light source that outputs a first signal light, a pump light source that outputs a pump light, a pump optical fiber that transfers the pump light, a first signal optical fiber that transfers the first signal light, a first amplifier that receives and amplifies the first signal light from the first signal optical fiber, a second signal optical fiber that receives and transfers a second signal light from the first amplifier, the second signal light being obtained by amplifying the first signal light, a second amplifier that receives and amplifies the second signal light from the second signal optical fiber, and an optical coupler connected to the first signal optical fiber, the second signal optical fiber, and the pump optical fiber, and that distributes the pump light to the first signal optical fiber and the second signal optical fiber.Type: ApplicationFiled: October 28, 2021Publication date: July 21, 2022Inventors: Hong-Seok SEO, Bongki MHEEN, Munhyun HAN
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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: 9857472Abstract: Provided is a laser radar system. The laser radar system includes a first transmission and reception unit sequentially radiating a first laser beam to a plurality of locations within a first view range and receiving a reflected light; and a second transmission and reception unit sequentially radiating a second laser beam to a plurality of locations within a second view range and receiving a reflected light, wherein each of the first transmission and reception unit and the second transmission and reception unit is fixed to a loader and independently searches for the first view range and the second view range.Type: GrantFiled: July 1, 2014Date of Patent: January 2, 2018Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Bongki Mheen, Myoungsook Oh, Jae-Sik Sim, Jung-Ho Song, Hong-Seok Seo, Minhyup Song
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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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Patent number: 9234964Abstract: Disclosed are a laser radar system and a method for acquiring an image of a target, and the laser radar system includes: a beam source to emit the laser beam; a beam deflector disposed between the beam source and the target, and configured to deflect the laser beam emitted from the beam source in a scanning direction of the target as time elapses; and an optical detector configured to detect the laser beam reflected from the target, which is provided a plurality of beam spots having a diameter DRBS; and a receiving optical system disposed between the target and the optical detector and configured to converge the laser beam reflected from the target, and the optical detector includes a detecting area having a diameter DDA that satisfies an equation of ?{square root over (2)}×PRBS+2×DRBS?DDA?2×Dlens and an equation of (4/?)×?×F_number<DRBS<Dlens.Type: GrantFiled: June 12, 2013Date of Patent: January 12, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Bongki Mheen, MyoungSook Oh, Kisoo Kim, Jae-Sik Sim, Yong-Hwan Kwon, Eun Soo Nam
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Patent number: 9170333Abstract: Disclosed is a system of a dynamic range three-dimensional image, including: an optical detector including a gain control terminal capable of controlling an optical amplification gain; a pixel detecting module for detecting a pixel signal for configuring an image by receiving an output of the optical detector; a high dynamic range (HDR) generating module for acquiring a dynamic range image by generating a signal indicating a saturation degree of the pixel signal and combining the pixel signal based on the pixel signal detected by the pixel detecting module; and a gain control signal generating module generating an output signal for supplying required voltage to the gain control terminal of the optical detector based on the magnitude of the signal indicating the saturation degree of the pixel signal.Type: GrantFiled: December 22, 2011Date of Patent: October 27, 2015Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Bongki Mheen, Ki-Jun Sung, Jae-Sik Sim, Kisoo Kim, MyoungSook Oh, Yong-Hwan Kwon, Eun Soo Nam
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Publication number: 20150079722Abstract: Disclosed are an avalanche photodiode with a guard ring structure that relieves edge breakdown by an external voltage which is applied through a metal pad which is attached to the guard ring and a manufacturing method thereof. An avalanche photodiode with a guard ring structure includes a plurality of semiconductor layers laminated on a substrate; an active region partially formed above the semiconductor layers; a guard ring which is formed above the semiconductor layers and disposed so as to be spaced apart from the active region and have a ring shape that encloses the active region; and a connecting unit formed on the semiconductor layers to be electrically connected to the guard ring so as to apply an external voltage to the guard ring region. Therefore, the external voltage is applied to the guard ring of the avalanche diode through the connecting unit to relieve the edge breakdown.Type: ApplicationFiled: November 25, 2014Publication date: March 19, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Bongki MHEEN, Myoungsook OH, Kisoo KIM, Jae-Sik SIM, Yong-Hwan KWON, Eun Soo NAM
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Publication number: 20150009485Abstract: Provided is a laser radar system. The laser radar system includes a first transmission and reception unit sequentially radiating a first laser beam to a plurality of locations within a first view range and receiving a reflected light; and a second transmission and reception unit sequentially radiating a second laser beam to a plurality of locations within a second view range and receiving a reflected light, wherein each of the first transmission and reception unit and the second transmission and reception unit is fixed to a loader and independently searches for the first view range and the second view range.Type: ApplicationFiled: July 1, 2014Publication date: January 8, 2015Applicant: Electronics and Telecommunications Research InstituteInventors: Bongki MHEEN, Myoungsook OH, Jae-Sik SIM, Jung-Ho SONG, Hong-Seok SEO, Minhyup SONG
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Publication number: 20140240691Abstract: Disclosed are a laser radar system and a method for acquiring an image of a target, and the laser radar system includes: a beam source to emit the laser beam; a beam deflector disposed between the beam source and the target, and configured to deflect the laser beam emitted from the beam source in a scanning direction of the target as time elapses; and an optical detector configured to detect the laser beam reflected from the target, which is provided a plurality of beam spots having a diameter DRBS; and a receiving optical system disposed between the target and the optical detector and configured to converge the laser beam reflected from the target, and the optical detector includes a detecting area having a diameter DDA that satisfies an equation of ?{square root over (/2)}×PRBS+2×DRBS?DDA?2×Dlens and an equation of (4/?)×?×F_number<DRBS<Dlens.Type: ApplicationFiled: June 12, 2013Publication date: August 28, 2014Inventors: Bongki MHEEN, MyoungSook Oh, Kisoo Kim, Jae-Sik Sim, Yong-Hwan Kwon, Eun Soo Nam
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Publication number: 20140175511Abstract: An avalanche photodiode according to the inventive concept includes a substrate, light absorption layers on the substrate, clad layers on the light absorption layers, and active regions in the clad layers. The light absorption layers, the clad layers, and the active regions constitute unit cells. Each of the unit cells has a fan-shape.Type: ApplicationFiled: July 25, 2013Publication date: June 26, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Jae-Sik SIM, Bongki Mheen, Kisoo Kim, Myoungsook Oh
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Patent number: 8742316Abstract: Provided is a photo detector. The photo detector includes: an avalanche photodiode; a bias circuit supplying a bias voltage to one end of the avalanche photodiode; a detection circuit connected to the other end of the avalanche photodiode and detecting a photoelectric current occurring in the avalanche photodiode; and a coupling capacitor connected to the one end or the other end of the avalanche photodiode and supplying a coupling voltage to drive the avalanche photodiode in a Geiger mode.Type: GrantFiled: November 9, 2010Date of Patent: June 3, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Kisoo Kim, Eun Soo Nam, Jae-Sik Sim, Yong-Hwan Kwon, Bongki Mheen, Myungsook Oh
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Patent number: 8710547Abstract: The inventive concept provides avalanche photo diodes and methods of manufacturing the same. The avalanche photo diode may include a substrate, a light absorption layer formed on the substrate, a clad layer formed on the light absorption layer, an active region formed in the clad layer, a guard ring region formed around the active region, and an insulating region formed between the guard ring region and the active region.Type: GrantFiled: September 6, 2012Date of Patent: April 29, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Jae-Sik Sim, Kisoo Kim, Bongki Mheen, MyoungSook Oh, Yong-Hwan Kwon, Eun Soo Nam
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Publication number: 20140042581Abstract: Disclosed are an avalanche photodiode with a guard ring structure that relieves edge breakdown by an external voltage which is applied through a metal pad which is attached to the guard ring and a manufacturing method thereof. An avalanche photodiode with a guard ring structure includes a plurality of semiconductor layers laminated on a substrate; an active region partially formed above the semiconductor layers; a guard ring which is formed above the semiconductor layers and disposed so as to be spaced apart from the active region and have a ring shape that encloses the active region; and a connecting unit formed on the semiconductor layers to be electrically connected to the guard ring so as to apply an external voltage to the guard ring region. Therefore, the external voltage is applied to the guard ring of the avalanche diode through the connecting unit to relieve the edge breakdown.Type: ApplicationFiled: November 29, 2012Publication date: February 13, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Bongki MHEEN, MyoungSook Oh, Kisoo Kim, Jae-Sik Sim, Yong-Hwan Kwon, Eun Soo Nam
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Publication number: 20130341486Abstract: The present disclosure relates to an apparatus for obtaining 3D information using a photodetector array. The apparatus for obtaining 3D information includes: a light source unit configured to generate an optical signal of a predetermined wavelength band; a light transmission optical lens unit provided on a path of the optical signal and configured to emit the optical signal output from the light source unit in parallel or at a predetermined angle; an optical scanning unit configured to scan the light output from the light transmission optical lens unit to a surface of an object to be measured; a light reception optical lens unit configured to collect the light reflected from the surface of the object; and a photodetection unit configured to convert collected optical signals into respective electrical signals by arraying one or more photodetectors such that light reception portions thereof are collected at a center.Type: ApplicationFiled: January 31, 2013Publication date: December 26, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: MyoungSook OH, Bongki MHEEN, Jae-Sik SIM, Kisoo KIM, Yun Jeong LEE, Yong-Hwan KWON, Eun Soo NAM
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Publication number: 20130327926Abstract: Provided is an FPA module capable of further improving a quality of an obtained 3-dimensional image by adjusting an interval of an arrangement of optical detectors and a size of the optical detector within an FPA module for obtaining the 3-dimensional image. An FPA module for obtaining a 3-dimensional image according to an exemplary embodiment of the present disclosure includes a plurality of light detectors configured to detect light reflected from a monitoring target, in which the plurality of light detectors is disposed at different intervals according to positions.Type: ApplicationFiled: June 11, 2013Publication date: December 12, 2013Inventors: Yong Hwan Kwon, Bongki Mheen, Myoung Sook Oh, Jae Sik Sim, Ki Soo Kim, Eun Soo Nam
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Publication number: 20130153962Abstract: The inventive concept provides avalanche photo diodes and methods of manufacturing the same. The avalanche photo diode may include a substrate, a light absorption layer formed on the substrate, a clad layer formed on the light absorption layer, an active region formed in the clad layer, a guard ring region formed around the active region, and an insulating region formed between the guard ring region and the active region.Type: ApplicationFiled: September 6, 2012Publication date: June 20, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jae-Sik SIM, Kisoo Kim, Bongki Mheen, MyoungSook Oh, Yong-Hwan Kwon, Eun Soo Nam