Patents by Inventor Hee Dok Choi
Hee Dok 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: 20240337706Abstract: A panel inspection apparatus includes an inspection zone including an inlet through which a display panel is input, an outlet through which the display panel is discharged, and an inspection line extending from the inlet to the outlet through which the display panel is moved, a return zone including a return line extending to the inlet of the inspection zone, a panel carrier on which the display panel is seated, moving from the inlet of the inspection zone to the outlet, and returning from the outlet to the inlet through the return line, and a cleaning part located in the return zone and cleaning the panel carrier in the return line.Type: ApplicationFiled: December 4, 2023Publication date: October 10, 2024Applicant: Samsung Display Co., LTD.Inventors: Woong-Jae CHANG, SORIM PARK, Hee Dok CHOI, YOUNGMYO HWANG
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Patent number: 9562798Abstract: A deposition rate measuring apparatus, including a crystal sensor facing a specific deposition source among a plurality of deposition sources in a deposition apparatus; a deposition-preventing bracket in a front portion of the crystal sensor, the deposition-preventing bracket having an opening that assists inflow of a specific deposition material, the deposition-preventing bracket extending from the opening, and the deposition-preventing bracket surrounding the crystal sensor to prevent interference due to at least one deposition material from at least one adjacent deposition source adjacent to the specific deposition source; and one or more cover portions spaced apart from the opening inward of the deposition-preventing bracket by a predetermined length.Type: GrantFiled: June 30, 2015Date of Patent: February 7, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Hee Dok Choi
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Publication number: 20160216143Abstract: A deposition rate measuring apparatus, including a crystal sensor facing a specific deposition source among a plurality of deposition sources in a deposition apparatus; a deposition-preventing bracket in a front portion of the crystal sensor, the deposition-preventing bracket having an opening that assists inflow of a specific deposition material, the deposition-preventing bracket extending from the opening, and the deposition-preventing bracket surrounding the crystal sensor to prevent interference due to at least one deposition material from at least one adjacent deposition source adjacent to the specific deposition source; and one or more cover portions spaced apart from the opening inward of the deposition-preventing bracket by a predetermined length.Type: ApplicationFiled: June 30, 2015Publication date: July 28, 2016Inventor: Hee Dok CHOI
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Patent number: 8999204Abstract: Disclosed is a conductive ink composition, a manufacturing method thereof, and a manufacturing method of a conductive thin film using the same, and more specifically, a conductive ink composition is provided that includes composite metal nanoparticles including first metal nanoparticles and second metal nanoparticles, and a polymer matrix. The polymer matrix is a composition including a polymer and a solvent, the first metal nanoparticles and the second metal nanoparticles are different metals, and the content of the composite metal nanoparticles is about 20 to about 25 wt %, the content of the polymer is about 5 to about 10 wt %, and the content of the solvent is about 65 to about 75 wt %, based on the total weight of the composition.Type: GrantFiled: September 29, 2011Date of Patent: April 7, 2015Assignee: Korea Institute of Science and TechnologyInventors: Jae-Min Hong, Yong-Won Song, Yong-Ju Jung, Hee-Dok Choi, Won-Suk Han, Hak-Sung Kim
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Publication number: 20130294975Abstract: An apparatus for oxygen sensing is provided. The apparatus for oxygen sensing includes: a header part to generate interference wave to light generated in a light source by the principle of fiber Fabry-Perot interferometer; and an optical spectrum analyzer to decide existence of oxygen based on change of spectrum periodicity of the above interference wave, in which the header part includes a sensing material of which effective refractive index changes by combination with the oxygen and the above interference wave changes its spectrum periodicity depending on change of effective refractive index of the above sensing material.Type: ApplicationFiled: April 24, 2013Publication date: November 7, 2013Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yong Won Song, Jung Ah Lim, Jae Min Hong, Nam Su Kang, Hee Dok Choi
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Publication number: 20120251736Abstract: Disclosed is a conductive ink composition, a manufacturing method thereof, and a manufacturing method of a conductive thin film using the same, and more specifically, a conductive ink composition is provided that includes composite metal nanoparticles including first metal nanoparticles and second metal nanoparticles, and a polymer matrix. The polymer matrix is a composition including a polymer and a solvent, the first metal nanoparticles and the second metal nanoparticles are different metals, and the content of the composite metal nanoparticles is about 20 to about 25 wt %, the content of the polymer is about 5 to about 10 wt %, and the content of the solvent is about 65 to about 75 wt %, based on the total weight of the composition.Type: ApplicationFiled: September 29, 2011Publication date: October 4, 2012Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jae-Min HONG, Yong-Won SONG, Yong-Ju JUNG, Hee-Dok CHOI, Won-Suk HAN, Hak-Sung KIM
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Patent number: 8237930Abstract: Provided is an oxygen sensor using surface plasmon resonance, including: a laser diode emitting light; a polarizer converting the emitted light into polarized light; a prism receiving the polarized light from the polarizer and having a sensor substrate on one surface thereof so that the polarized light is reflected, the sensor substrate coated with oxygen-sensitive organic material; an oxygen concentration measurement chamber provided to enclose the sensor substrate so that oxygen whose concentration is to be measured is contained therein; a photodiode measuring an amount of light reflected from the prism; and a microcontroller unit controlling operation of the oxygen sensor and calculating the oxygen concentration.Type: GrantFiled: August 18, 2009Date of Patent: August 7, 2012Assignee: Korea Institute of Science and TechnologyInventors: Jae Min Hong, Hee Dok Choi, Il Doo Kim
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Patent number: 7746086Abstract: Disclosed herein are a noncontact single side probe and an apparatus and method for testing open and short circuits of pattern electrodes. By feeding power to one end of each of the pattern electrodes and sensing an electrical variation value using a noncontact type single side probe device including an exciter electrode and a sensor electrode as a single module, the open and short circuits of pattern electrodes can be tested by one scanning process. Since the open and short circuits of the pattern electrodes are tested using the noncontact type single side probe device, the pattern electrode can be prevented from being damaged due to a contact failure or pressurized contact and the life span of the probe device can increase compared with a contact type probe device.Type: GrantFiled: July 12, 2007Date of Patent: June 29, 2010Assignee: Microinspection, Inc.Inventors: Tak Eun, Seong Jin Kim, Hee Dok Choi, Dong Jun Lee, Jong In Park, Woo Chul Cho
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Publication number: 20100045997Abstract: An oxygen sensor using the principle of surface plasmon resonance, capable of measuring an oxygen concentration in a measurement chamber by detecting a change in resonance angle or refractive index using field enhancement effects, is provided. An oxygen transmission rate measurement system including the oxygen sensor is also provided. In this invention, only a change in voltage is measured at a fixed angle, thus achieving rapid measurement, and also, a single wavelength light source is used, thus reducing the size of the oxygen sensor and oxygen transmission rate measurement system.Type: ApplicationFiled: August 18, 2009Publication date: February 25, 2010Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jae Min HONG, Hee Dok CHOI, Il Doo KIM
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Patent number: 7629796Abstract: Disclosed herein are an apparatus and method for testing open and short circuits of conductive lines. A probe is brought into contact with one end of each of the conductive lines, AC power is applied, and the conductive lines are tested using electrical variations measured in the probe. By using a single-side probe device, it is possible to remarkably reduce the number of probes when the open or short circuit of a PCB pattern, a data transmission line or an electrical cable is tested and to remarkably reduce time or labor necessary for testing the open or short circuit. Since the measurement is performed only at one end of the conductive line to test the open or short circuit of the conductive line, it is possible to self-diagnose the open or short circuit when a single-side probe device is mounted in an input/output port of an electrical device.Type: GrantFiled: July 12, 2007Date of Patent: December 8, 2009Assignee: Microinspection, Inc.Inventors: Tak Eun, Seong Jin Kim, Hee Dok Choi, Dong Jun Lee, Dae Woong Song
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Publication number: 20080018338Abstract: Disclosed herein are an apparatus and method for testing open and short circuits of conductive lines. A probe is brought into contact with one end of each of the conductive lines, AC power is applied, and the conductive lines are tested using electrical variations measured in the probe. By using a single-side probe device, it is possible to remarkably reduce the number of probes when the open or short circuit of a PCB pattern, a data transmission line or an electrical cable is tested and to remarkably reduce time or labor necessary for testing the open or short circuit. Since the measurement is performed only at one end of the conductive line to test the open or short circuit of the conductive line, it is possible to self-diagnose the open or short circuit when a single-side probe device is mounted in an input/output port of an electrical device.Type: ApplicationFiled: July 12, 2007Publication date: January 24, 2008Applicant: MICROINSPECTION, INC.Inventors: Tak Eun, Seong Jin Kim, Hee Dok Choi, Dong Jun Lee, Dae Woong Song
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Publication number: 20080018339Abstract: Disclosed herein are a noncontact single side probe and an apparatus and method for testing open and short circuits of pattern electrodes. By feeding power to one end of each of the pattern electrodes and sensing an electrical variation value using a noncontact type single side probe device including an exciter electrode and a sensor electrode as a single module, the open and short circuits of pattern electrodes can be tested by one scanning process. Since the open and short circuits of the pattern electrodes are tested using the noncontact type single side probe device, the pattern electrode can be prevented from being damaged due to a contact failure or pressurized contact and the life span of the probe device can increase compared with a contact type probe device.Type: ApplicationFiled: July 12, 2007Publication date: January 24, 2008Applicant: MICROINSPECTION, INC.Inventors: Tak Eun, Seong Jin Kim, Hee Dok Choi, Dong Jun Lee, Jong In Park, Woo Chul Cho