Patents by Inventor Dong-il Cho
Dong-il Cho 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: 20240158338Abstract: A novel compound for a capping layer, and an organic light-emitting device containing the same are disclosed.Type: ApplicationFiled: December 29, 2023Publication date: May 16, 2024Inventors: Ho Wan HAM, Hyun Cheol AN, Hee Joo KIM, Dong Jun KIM, Ja Eun ANN, Dong Yuel KWON, Sung Kyu LEE, Hwan Il JE, Bo Ra LEE, Yeong Rong PARK, Il Soo OH, Dae Woong LEE, Hyeon Jeong IM, Ill Hun CHO
-
Publication number: 20220070590Abstract: The present disclosure relates to a design method for a piezoresistive-sensing-type microphone with an arc-shaped spring structure for ultra-miniaturization and high sensitivity. With the addition of the spring structure to the membrane, it is possible to minimize the membrane that has greater area for high sensitivity, and further, it is possible to minimize the area while providing the same effect as beam-shape springs and serpentine springs through an arc-shape spring design. A piezoresistor such as silicon nanowires with good piezoresistive properties as a sensing element is included in the spring structure to achieve high sensitivity, and the piezoresistor is placed in the spring structure at each location where the maximum tension occurs and where the maximum compression occurs through simulation. This allows both single-mode and differential-mode measurement, thereby ensuring the maximum resistance change and SNR.Type: ApplicationFiled: September 29, 2020Publication date: March 3, 2022Inventors: Dong Il CHO, Bobaro CHANG, Ailian JIN, Tae Yup KIM, Junghyun PARK
-
Patent number: 9996084Abstract: A system of controlling a vision device based on motion commands may include: a movable body; a vision device driven by being connected to the body and receiving image information; a driving unit driving the body in accordance with a motion command; and a control unit which calculates motion information of the body using the motion command and drives the vision device so as to compensate an influence caused by the motion of the body using the calculated motion information. By using the system, reliable image information may be obtained in a manner such that a vision device included in a subject such as a locomobile robot is controlled to watch a predetermined target even when the subject moves.Type: GrantFiled: February 23, 2011Date of Patent: June 12, 2018Assignee: SNU R&DB FOUNDATIONInventors: Dong-il Cho, Jaehong Park
-
Patent number: 9795787Abstract: A retinal prosthesis system can comprise: a flexible substrate; a nanowire light detector which is placed on the substrate, and comprises one or more nanowires of which the resistance changes according to the applied light; one or more micro-electrodes which are placed on the substrate, are electrically connected to the nanowire light detector, and come in contact with retinal cells; and an electric power supply source for applying electric power to the nanowire light detector and the micro-electrodes. The retinal prosthesis system can be implemented into a very thin and flexible substrate type high resolution retinal system by manufacturing a nanowire light detector on a substrate in which micro-electrodes are implemented.Type: GrantFiled: April 21, 2016Date of Patent: October 24, 2017Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Dong Il Cho, Sangmin Lee, Suk Won Jung, Jong Yoon Shin
-
Patent number: 9541908Abstract: The present invention relates to a servo motor controller for controlling a servo motor having a current limiting unit, and a tuningless nonlinear control method thereof. According to the present invention, the servo motor controller control method for controlling a servo motor including a current limiting unit comprises the steps of: detecting that the limited current is output according to a current command of the current limiting unit; adjusting a disturbance estimation gain of the servo motor controller in response to the output of the limited current; and generating a control input provided from the servo motor controller to the current limiting unit on the basis of the adjusted disturbance estimation gain.Type: GrantFiled: April 22, 2014Date of Patent: January 10, 2017Assignees: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, RS AUTOMATION CO., LTD.Inventors: Dong Il Cho, Wook Bahn, Sang Hoon Lee
-
Publication number: 20160235989Abstract: A retinal prosthesis system can comprise: a flexible substrate; a nanowire light detector which is placed on the substrate, and comprises one or more nanowires of which the resistance changes according to the applied light; one or more micro-electrodes which are placed on the substrate, are electrically connected to the nanowire light detector, and come in contact with retinal cells; and an electric power supply source for applying electric power to the nanowire light detector and the micro-electrodes. The retinal prosthesis system can be implemented into a very thin and flexible substrate type high resolution retinal system by manufacturing a nanowire light detector on a substrate in which micro-electrodes are implemented.Type: ApplicationFiled: April 21, 2016Publication date: August 18, 2016Inventors: Dong Il CHO, Sangmin LEE, Suk Won JUNG, Jong Yoon SHIN
-
Patent number: 9372100Abstract: This disclosure relates to a method for detecting an absolute rotation angle of an optical rotary encoder, and more particularly, to an optical encoder having a signal track for generating a digital pulse which may correct an error when a high-level bit is generated in a Vernier type. The optical encoder according to an embodiment of the present disclosure includes a master track for generating a sinusoidal signal with the fastest cycle, a Vernier track for generating a sinusoidal signal with a cycle smaller than that of the master track by a predetermined value, and a digital track for generating a digital pulse signal with a cycle proportional to the cycle of the sinusoidal signal of the master track.Type: GrantFiled: April 25, 2013Date of Patent: June 21, 2016Assignees: SNU R&D Foundation, RS Automation Co., Ltd.Inventors: Dong Il Cho, Wook Bahn, Tae Il Kim, Sang Hoon Lee
-
Patent number: 9351924Abstract: One aspect of the present invention relates to a drug delivery system comprising a layered structure where a drug layer and a biodegradable polymer layer for controlling the release of drugs are alternately laminated. The drug delivery system can easily control an in-vivo drug release rate and a release amount.Type: GrantFiled: September 20, 2011Date of Patent: May 31, 2016Assignee: SNU R&DB FOUNDATIONInventors: Dong-Il Cho, Seok Jun Hong, Sang Min Lee, Jae Hyun Ahn, Hyoung Jung Yoo
-
Patent number: 9345568Abstract: A retinal prosthesis system can comprise: a flexible substrate; a nanowire light detector which is placed on the substrate, and comprises one or more nanowires of which the resistance changes according to the applied light; one or more micro-electrodes which are placed on the substrate, are electrically connected to the nanowire light detector, and come in contact with retinal cells; and an electric power supply source for applying electric power to the nanowire light detector and the micro-electrodes. The retinal prosthesis system can be implemented into a very thin and flexible substrate type high resolution retinal system by manufacturing a nanowire light detector on a substrate in which micro-electrodes are implemented.Type: GrantFiled: May 4, 2012Date of Patent: May 24, 2016Assignee: SNU R&DB FOUNDATIONInventors: Dong Il Cho, Suk Won Jung, Sang Min Lee, Sun Kil Park, Jae Hyun Ahn, Seok Jun Hong, Hyoung Jung Yoo
-
Publication number: 20160077500Abstract: The present invention relates to a servo motor controller for controlling a servo motor having a current limiting unit, and a tuningless nonlinear control method thereof. According to the present invention, the servo motor controller control method for controlling a servo motor including a current limiting unit comprises the steps of: detecting that the limited current is output according to a current command of the current limiting unit; adjusting a disturbance estimation gain of the servo motor controller in response to the output of the limited current; and generating a control input provided from the servo motor controller to the current limiting unit on the basis of the adjusted disturbance estimation gain.Type: ApplicationFiled: April 22, 2014Publication date: March 17, 2016Inventors: Dong Il CHO, Wook BAHN, Sang Hoon LEE
-
Publication number: 20150171999Abstract: This disclosure relates to a method for detecting an absolute rotation angle of an optical rotary encoder, and more particularly, to an optical encoder having a signal track for generating a digital pulse which may correct an error when a high-level bit is generated in a Vernier type. The optical encoder according to an embodiment of the present disclosure includes a master track for generating a sinusoidal signal with the fastest cycle, a Vernier track for generating a sinusoidal signal with a cycle smaller than that of the master track by a predetermined value, and a digital track for generating a digital pulse signal with a cycle proportional to the cycle of the sinusoidal signal of the master track.Type: ApplicationFiled: April 25, 2013Publication date: June 18, 2015Applicant: RS AUTOMATION CO., LTD.Inventors: Dong Il Cho, Wook Bahn, Tae Il Kim, Sang Hoon Lee
-
Publication number: 20140005600Abstract: One aspect of the present invention relates to a drug delivery system comprising a layered structure where a drug layer and a biodegradable polymer layer for controlling the release of drugs are alternately laminated. The drug delivery system can easily control an in-vivo drug release rate and a release amount.Type: ApplicationFiled: September 20, 2012Publication date: January 2, 2014Applicant: SNU R&DB FOUNDATIONInventors: Dong-Il Cho, Seok Jun Hong, Sang Min Lee, Jae Hyun Ahn, Hyoung Jung Yoo
-
Publication number: 20130310933Abstract: A retinal prosthesis system can comprise: a flexible substrate; a nanowire light detector which is placed on the substrate, and comprises one or more nanowires of which the resistance changes according to the applied light; one or more micro-electrodes which are placed on the substrate, are electrically connected to the nanowire light detector, and come in contact with retinal cells; and an electric power supply source for applying electric power to the nanowire light detector and the micro-electrodes. The retinal prosthesis system can be implemented into a very thin and flexible substrate type high resolution retinal system by manufacturing a nanowire light detector on a substrate in which micro-electrodes are implemented.Type: ApplicationFiled: May 4, 2012Publication date: November 21, 2013Applicant: SNU R&DB FOUNDATIONInventors: Dong Il Cho, Suk Won Jung, Sang Min Lee, Sun Kil Park, Jae Hyun Ahn, Seok Jun Hong, Hyoung Jung Yoo
-
Publication number: 20130110355Abstract: Provided are a direction control system and a method of a radar system or a vision system mounted in a vehicle. The direction control system of the radar and vision system for a vehicle according to an embodiment includes: an inertial sensor system and a handle steering angle sensor system which detect posture and movement information regarding a vehicle; a control unit which generates a control signal on the basis of the posture and movement information regarding the vehicle detected by the inertial sensor system and the handle steering angle sensor system; first and second driving units which are driven according to the control signal of the control unit; and a radar system and a vision system which are respectively connected to the first and second driving units.Type: ApplicationFiled: October 26, 2011Publication date: May 2, 2013Inventors: Dong-il CHO, Jaehong Park, Wonsang Hwang, Hyunil Kwon, Jong-hyeon Kim, Changhun Lee
-
Patent number: 8285416Abstract: A system and a method for stabilization control may control position and direction of an object having first and second bodies connected to each other. The system may include an artificial vestibular apparatus for outputting a movement signal corresponding to movement of the first body and a rotation signal corresponding to rotation of the first body; a translating actuation unit connected between the first and second bodies and controlling position of the second body in response to the movement signal; and a rotating actuation unit connected between the first and second bodies and controlling rotation of the second body in response to the rotation signal. If the system and the method are applied to a vision system of a mobile robot, the vision system may obtain stabile image information even when the mobile robot is moving. Thus, it is possible to prevent any blurring from occurring at the image information.Type: GrantFiled: February 12, 2009Date of Patent: October 9, 2012Assignee: SNU R&DB FoundationInventors: Dong-il Cho, Hyoungho Ko, Jaehong Park, Sangmin Lee
-
Publication number: 20120212623Abstract: A system of controlling a vision device based on motion commands may include: a movable body; a vision device driven by being connected to the body and receiving image information; a driving unit driving the body in accordance with a motion command; and a control unit which calculates motion information of the body using the motion command and drives the vision device so as to compensate an influence caused by the motion of the body using the calculated motion information. By using the system, reliable image information may be obtained in a manner such that a vision device included in a subject such as a locomobile robot is controlled to watch a predetermined target even when the subject moves.Type: ApplicationFiled: February 23, 2011Publication date: August 23, 2012Inventors: Dong-il Cho, Jaehong Park
-
Patent number: 8118753Abstract: Disclosed are a barb-wired single crystalline silicon micro needle and a biopsy method and a medicine injecting method using the same. The micro needle comprises a main body part, at least one extension part formed on a side surface of the main body part, and a protrusion part protruded from both side surfaces of the extension part. A medicine storage is formed on a surface of the main body part. A fluid passage is formed in the extension part and the main body part. It is easy to pick the tissue sample with the protrusion part just by inserting and extracting the extension part of the micro needle into and from the tissue for a biopsy. Therefore, the biopsy procedures can be simplified. In addition, the medicine in the storage can be injected into the tissue via the fluid passage.Type: GrantFiled: February 12, 2008Date of Patent: February 21, 2012Assignee: Seoul National University Industry FoundationInventors: Dong-il Cho, Seung Joon Paik, Jung Min Lim, Ah Ra Lee, Sang Won Byun, Kyo-In Koo
-
Publication number: 20110184388Abstract: Provided are a bacterium-based microrobot for medical treatment, an operation method thereof, and a treatment method using the same. The bacterium-based microrobot can be propelled by the flagellum movement of bacteria, can be directed toward a target lesion by the ability of bacteria to recognize the lesion, can be monitored for how many the microrobot targets the lesion, and can directly or indirectly treat the lesion by the proliferation of bacteria through self-division in the lesion. The bacteria may be genetically manipulated to be resistant to immune responses and produce a material inhibitory of the growth of affected cells.Type: ApplicationFiled: December 30, 2008Publication date: July 28, 2011Applicant: INDUSTRY FOUNDATION OF CHONNAM NATIONAL UNIVERSITYInventors: Suk Ho Park, Jong Oh Park, Jung Joon Min, Yeong Jin Hong, Dong Il Cho, Jong Mo Seo, Jennifer Hyunjong Shin, Heung Soo Shin, Jung Yul Park
-
Patent number: 7927289Abstract: Disclosed is a catheter used to pick a sample of a lesion cell tissue existing in the living body, and more particularly a catheter capable of freely coupling or separating a micro biopsy tool and picking a tissue required for an examination just by inserting and extracting the biopsy tool into and from a lesion region when picking the tissue. The catheter can pick a tissue required to diagnose and treat an examinee with a minimal invasion. Accordingly, it is possible to alleviate the examinee's pain and to prevent a perforation from occurring in the picked region when picking the tissue. In addition, according to the catheter of the invention, since the micro biopsy tool can be easily mounted and separated, the catheter can be semi-permanently used by continuously replacing the biopsy tool only.Type: GrantFiled: November 21, 2005Date of Patent: April 19, 2011Assignee: Seoul National University Industry FoundationInventors: Dong-il Cho, Sun Kil Park, Ah Ra Lee, Seung Joon Paik, Myoung Jun Jeong, Hyun Min Choi, Jung Min Lim
-
Publication number: 20100106295Abstract: A system and a method for stabilization control may control position and direction of an object having first and second bodies connected to each other. The system may include an artificial vestibular apparatus for outputting a movement signal corresponding to movement of the first body and a rotation signal corresponding to rotation of the first body; a translating actuation unit connected between the first and second bodies and controlling position of the second body in response to the movement signal; and a rotating actuation unit connected between the first and second bodies and controlling rotation of the second body in response to the rotation signal. If the system and the method are applied to a vision system of a mobile robot, the vision system may obtain stabile image information even when the mobile robot is moving. Thus, it is possible to prevent any blurring from occurring at the image information.Type: ApplicationFiled: February 12, 2009Publication date: April 29, 2010Inventors: Dong-il Cho, Hyoungho Ko, Jaehong Park, Sangmin Lee