Patents by Inventor Hee-yuel Roh
Hee-yuel Roh 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: 11644230Abstract: Provide is a refrigerator provided with a defrosting device capable of enhancing the defrosting efficiency. The refrigerator includes main body, storage compartment provided inside the main body, an evaporator provided in the storage compartment and configured to generate cold air, a first flow path allowing air to be guided in a first direction for the air to be supplied to the storage compartment during a cooling operation, a defrosting heater configured to generate heat for defrost, a second flow path allowing air to be guided in a second direction opposite to the first direction for the air to be circulated around the evaporator during a defrosting operation, a fan allowing air having received heat from the defrosting heater to be circuited around the evaporator through the second flow path, and a flow path resistance portion provided on the second flow path to increase a flow path resistance in the first direction.Type: GrantFiled: February 19, 2019Date of Patent: May 9, 2023Assignee: Samsung Electronics Co., Ltd.Inventors: In Sub Lee, Kook Jeong Seo, Dae Whan Kim, Hee Yuel Roh, Jeong-Min Jeon, Young Don Jeong
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Patent number: 11359855Abstract: A refrigerator includes a storage compartment; a first flow path separated from the storage compartment; an evaporator provided on the first flow path to cool air; a compressor configured to discharge a refrigerant to the evaporator; a blower fan configured to discharge air of the first flow path to the storage compartment; a defrost heater provided on the first flow path to heat the evaporator; a second flow path separated from the first flow path; a defrost fan configured to suction air of the first flow path into the second flow path; and a controller configured to alternately perform a cooling operation and a defrosting operation, configured to operate the compressor and the blower fan during the cooling operation, configured to operate the defrost heater and the defrost fan during the defrosting operation, and configured to vary a rotational speed of the defrost fan.Type: GrantFiled: November 27, 2019Date of Patent: June 14, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hee Yuel Roh, Kook Jeong Seo, In Sub Lee, Dae Whan Kim, Jeong-Min Jeon
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Patent number: 11067291Abstract: A cooking apparatus having a hood according to the disclosure may increase suction performance of a blower fan by arranging the blower fan beneath a cooking chamber to force air to be inhaled into the housing as a whirling current of air, and improve suction performance of the blower fan by arranging at least one auxiliary outlet around and outside the blower fan for some of the inhaled air to be discharged downward to form an air curtain around the inlet. Furthermore, a duct may be formed inside the housing of the cooking apparatus having the hood for an inhaled substance through the inlet to be easily moved to the outlet.Type: GrantFiled: October 18, 2017Date of Patent: July 20, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Soon Cheol Kweon, Hee Yuel Roh, You Seop Lee, Ki Hwan Kwon
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Publication number: 20210010740Abstract: Provide is a refrigerator provided with a defrosting device capable of enhancing the defrosting efficiency. The refrigerator includes main body, storage compartment provided inside the main body, an evaporator provided in the storage compartment and configured to generate cold air, a first flow path allowing air to be guided in a first direction for the air to be supplied to the storage compartment during a cooling operation, a defrosting heater configured to generate heat for defrost, a second flow path allowing air to be guided in a second direction opposite to the first direction for the air to be circulated around the evaporator during a defrosting operation, a fan allowing air having received heat from the defrosting heater to be circuited around the evaporator through the second flow path, and a flow path resistance portion provided on the second flow path to increase a flow path resistance in the first direction.Type: ApplicationFiled: February 19, 2019Publication date: January 14, 2021Inventors: In Sub LEE, Kook Jeong SEO, Dae Whan KIM, Hee Yuel ROH, Jeong-Min JEON, Young Don JEONG
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Publication number: 20200173709Abstract: A refrigerator includes a storage compartment; a first flow path separated from the storage compartment; an evaporator provided on the first flow path to cool air; a compressor configured to discharge a refrigerant to the evaporator; a blower fan configured to discharge air of the first flow path to the storage compartment; a defrost heater provided on the first flow path to heat the evaporator; a second flow path separated from the first flow path; a defrost fan configured to suction air of the first flow path into the second flow path; and a controller configured to alternately perform a cooling operation and a defrosting operation, configured to operate the compressor and the blower fan during the cooling operation, configured to operate the defrost heater and the defrost fan during the defrosting operation, and configured to vary a rotational speed of the defrost fan.Type: ApplicationFiled: November 27, 2019Publication date: June 4, 2020Applicant: Samsung Electronics Co., Ltd.Inventors: Hee Yuel ROH, Kook Jeong SEO, In Sub LEE, Dae Whan KIM, Jeong-Min JEON
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Publication number: 20190285284Abstract: A cooking apparatus having a hood according to the disclosure may increase suction performance of a blower fan by arranging the blower fan beneath a cooking chamber to force air to be inhaled into the housing as a whirling current of air, and improve suction performance of the blower fan by arranging at least one auxiliary outlet around and outside the blower fan for some of the inhaled air to be discharged downward to form an air curtain around the inlet. Furthermore, a duct may be formed inside the housing of the cooking apparatus having the hood for an inhaled substance through the inlet to be easily moved to the outlet.Type: ApplicationFiled: October 18, 2017Publication date: September 19, 2019Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Soon Cheol KWEON, Hee Yuel ROH, You Seop LEE, Ki Hwan KWON
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Patent number: 10379662Abstract: A touch screen panel may include a liquid crystal, a first transparent electrode and a second transparent electrode provided at both sides of the liquid crystal, and a controller configured to transfer image data to the first transparent electrode and the second transparent electrode in a first mode and sense a touch of a user on at least one of the first transparent electrode and the second transparent electrode in a second mode.Type: GrantFiled: August 28, 2015Date of Patent: August 13, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Joo Ho Kim, Hee Yuel Roh, Tatsuhiro Otsuka, Seok Min Oh, Kang Min Lee, Jun Sung Chung, Ji Su Jung, Hyun Geun Jo, Chul Ho Han
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Patent number: 10133104Abstract: Disclosed herein are a display device which exhibits superior surface flatness of an upper electrode substrate and excellent sealing effects by performing sealing such that an end of a barrier formed in a front electrode is inserted into the upper electrode having a gel-state, and a method of producing the same. The display device includes a first electrode module comprising a first electrode, a second electrode module including a second electrode, the second electrode module facing the first electrode module, a plurality of barriers formed on the first electrode module, each barrier having an end inserted into the second electrode, a plurality of cavities formed by the first electrode module and the barriers, and an electric field-dependent layer formed in each of the cavities, the electric field-dependent layer having properties changed by an electric field applied between the first electrode module and the second electrode module.Type: GrantFiled: March 2, 2015Date of Patent: November 20, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Eung Yeoul Yoon, Joo Ho Kim, Jin Seung Choi, Sang Cheol Moon, Hee Yuel Roh
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Patent number: 9934755Abstract: A display device which may operate as a reflective display device which uses external light without separate power supply at an illumination level equal to or greater than a certain illumination level, and which may operate as a transmissive display device which uses internal light at an illumination level less than the certain illumination level to provide a clear image in an outdoor environment and a dark indoor environment. Power consumption may be minimized by automatically switching the display mode depending on the illumination level.Type: GrantFiled: November 18, 2014Date of Patent: April 3, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hee Yuel Roh, Joo Ho Kim, Sang Cheol Moon, Eung Yeoul Yoon, Jun Sung Chung, Jin Seung Choi, In Hak Na
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Publication number: 20170285849Abstract: A touch screen panel may include a liquid crystal, a first transparent electrode and a second transparent electrode provided at both sides of the liquid crystal, and a controller configured to transfer image data to the first transparent electrode and the second transparent electrode in a first mode and sense a touch of a user on at least one of the first transparent electrode and the second transparent electrode in a second mode.Type: ApplicationFiled: August 28, 2015Publication date: October 5, 2017Applicant: Samsung Electronics Co., Ltd.Inventors: Joo Ho KIM, Hee Yuel ROH, Tatsyhiro OTSUKA, Seok Min OH, Kang Min LEE, Jun Sung CHUNG, Ji Su JUNG, Hyun Geun JO, Chul Ho HAN
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Publication number: 20170273529Abstract: Disclosed are related to a dust collecting apparatus, a cleaning apparatus, and a method of controlling the cleaning apparatus. The dust collecting apparatus may comprises a dust collecting space configured to collect impurities and a variable body formed to surround the dust collecting space and having one of transparency, shape and color changed by selectively transmitting or reflecting light in response to applied electric power.Type: ApplicationFiled: August 24, 2015Publication date: September 28, 2017Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jun Sung CHUNG, Joo Ho KIM, Hee Yuel ROH
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Publication number: 20170269402Abstract: The present disclosure relates to a display device in which the same driving voltage is applied to pixels and a manufacturing method thereof. One aspect of a display device comprises a first substrate; a second substrate; and a liquid crystal layer disposed between the first substrate and the second substrate and comprising a plurality of sub-cells, wherein the plurality of sub-cells respectively comprises a cholesteric liquid crystal and a polymer cured to fix a helical pitch of the cholesteric liquid crystal.Type: ApplicationFiled: April 24, 2015Publication date: September 21, 2017Inventors: Hee Yuel ROH, Soon Bum KWON, Kyoung Sun KIM, Yan JIN, Joo Ho KIM, Burm Young LEE, Jun Sung CHUNG
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Patent number: 9689603Abstract: A refrigerator includes a body including a storage chamber; a door that is coupled to the body so as to open/close the storage chamber; a display that is disposed in at least one region of the door and is configured to be converted between a transparent mode and a display mode; and a controller that controls the display to display at least one among a text, an image, and color when the display is in the display mode.Type: GrantFiled: March 30, 2015Date of Patent: June 27, 2017Assignees: SAMSUNG ELECTRONICS CO., LTD., NDIS CORPORATIONInventors: Hee Yuel Roh, Soon-Bum Kwon, Kyoung Sun Kim, Joo Ho Kim, Otsuka Tatsuhiro, Burm-Young Lee
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Publication number: 20160370642Abstract: Disclosed herein are a display device which exhibits superior surface flatness of an upper electrode substrate and excellent sealing effects by performing sealing such that an end of a barrier formed in a front electrode is inserted into the upper electrode having a gel-state, and a method of producing the same. The display device includes a first electrode module comprising a first electrode, a second electrode module including a second electrode, the second electrode module facing the first electrode module, a plurality of barriers formed on the first electrode module, each barrier having an end inserted into the second electrode, a plurality of cavities formed by the first electrode module and the barriers, and an electric field-dependent layer formed in each of the cavities, the electric field-dependent layer having properties changed by an electric field applied between the first electrode module and the second electrode module.Type: ApplicationFiled: March 2, 2015Publication date: December 22, 2016Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Eung Yeoul YOON, Joo Ho KIM, Jin Seung CHOI, Sang Cheol MOON, Hee Yuel ROH
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Publication number: 20150276302Abstract: A refrigerator includes a body including a storage chamber; a door that is coupled to the body so as to open/close the storage chamber; a display that is disposed in at least one region of the door and is configured to be converted between a transparent mode and a display mode; and a controller that controls the display to display at least one among a text, an image, and color when the display is in the display mode.Type: ApplicationFiled: March 30, 2015Publication date: October 1, 2015Applicants: SAMSUNG ELECTRONICS CO., LTD., NDIS CorporationInventors: Hee Yuel ROH, Soon-Bum KWON, Kyoung Sun KIM, Joo Ho KIM, Otsuka TATSUHIRO, Burm-Young LEE
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Publication number: 20150138214Abstract: A display device which may operate as a reflective display device which uses external light without separate power supply at an illumination level equal to or greater than a certain illumination level, and which may operate as a transmissive display device which uses internal light at an illumination level less than the certain illumination level to provide a clear image in an outdoor environment and a dark indoor environment. Power consumption may be minimized by automatically switching the display mode depending on the illumination level.Type: ApplicationFiled: November 18, 2014Publication date: May 21, 2015Applicant: Samsung Electronics Co., Ltd.Inventors: Hee Yuel ROH, Joo Ho Kim, Sang Cheol Moon, Eung Yeoul Yoon, Jun Sung Chung, Jin Seung Choi, In Hak Na
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Publication number: 20120161033Abstract: A microorganism detection apparatus including a light source unit to irradiate light, a mirror chamber including a light inlet port and a light outlet port, through which the light is introduced and discharged, respectively an inlet port and an outlet port, through which particles are introduced and discharged, respectively, so that light emitted from the particles (emitted particle light) is generated by the light, and an opening, through which the emitted particle light is discharged outside. The mirror chamber has an oval longitudinal section, and is provided at an inside thereof with a mirror. A condensing optical system is disposed in front of the opening outside the opening to condense the emitted particle light discharged through the opening. Condensing efficiency of the fluorescent light condensing optical system is maximized.Type: ApplicationFiled: December 9, 2011Publication date: June 28, 2012Applicants: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, SAMSUNG ELECTRONICS CO., LTD.Inventors: Joonhyung KWON, Hee Yuel ROH, Du Seop YOON, Soo Hyun KIM, Won Sik KWON, Sung Yoon RYU, Hyub LEE
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Publication number: 20120162644Abstract: A microparticle detection apparatus is provided. The microparticle detection apparatus includes a light emitting optical element, a converging optical system disposed in an advancing direction of light emitted from the optical element to converge the light, a particle path located in an advancing direction of the light having passed through the converging optical system so that the particle path intersects the light, a beam blocking unit to block direct light having passed through the particle path, a condensing lens disposed at the rear of the beam blocking unit, and a detector disposed at the rear of the condensing lens to detect light scattered by particles. A focal point of light formed by the optical element and the converging optical system may be located at the rear of the particle path. A focal point of light irradiated to the particles may be different from the introduction position of the particles.Type: ApplicationFiled: December 23, 2011Publication date: June 28, 2012Applicants: Korea Advanced Institute of Science and Technology, Samsung Electronics Co., Ltd.Inventors: Joonhyung KWON, Du Seop Yoon, Hee Yuel Roh, Soo Hyun Kim, Sung Yoon Ryu, Won Sik Kwon, Hyub Lee
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Patent number: 7740336Abstract: An array type multi-pass inkjet printer head and an operating method thereof. The array type inkjet printer includes an image dividing unit to divide an image to be printed into a plurality of images, a printing unit having a head and to print one of the plurality of divided images on a printing medium using the head, the head being formed in a lateral direction and having a plurality of nozzles disposed in a longitudinal direction thereof, a feedback unit to reversely move the printing medium to a preceding end of the printing unit after the one of the plurality of divided images is printed by the printing unit, and a control unit to control the printing unit to print a divided image next to the printed one image on the reversely printing medium.Type: GrantFiled: February 26, 2007Date of Patent: June 22, 2010Assignee: Samsung Electronics Co. Ltd.Inventors: Soo-hyun Kim, Masahiko Habuka, Heon-soo Park, Karp-sik Youn, Hee-yuel Roh, Jung-dae Heo
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Publication number: 20090303279Abstract: A nozzle wetting apparatus for an inkjet image forming apparatus includes a cleaning solution tank to store cleaning solution for cleaning a nozzle; a cleaning solution supplying unit to supply cleaning solution to the nozzle, the cleaning solution supplying unit including a vibration generating member to generate vibrations to atomize the cleaning solution. The nozzle wetting apparatus applies cleaning solution to the nozzles to clean the nozzles of the image forming apparatus without touching the nozzles.Type: ApplicationFiled: November 26, 2008Publication date: December 10, 2009Applicant: Samsung Electronics Co., Ltd.Inventor: Hee-yuel ROH