Patents by Inventor Seung Tae Choi
Seung Tae 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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Patent number: 8004771Abstract: Provided is a varifocal lens and method of manufacturing the varifocal lens. The varifocal lens includes a transparent substrate, a spacer frame arranged to form an inner space on the transparent substrate, wherein the inner space is to be filled with an optical fluid, a rigid frame disposed to be adjacent to the spacer frame, and an optical membrane and an actuator which are formed on a surface of the rigid frame. The rigid frame supports the actuator and the optical membrane, wherein the actuator applies a pressure to an optical fluid and the optical membrane is modified according to a flow of the optical fluid.Type: GrantFiled: November 25, 2009Date of Patent: August 23, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Seung-tae Choi, Seung-wan Lee, Jeong-yub Lee, Jong-oh Kwon
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Patent number: 7986466Abstract: A varifocal lens includes a hollow case having first and second sidewalls facing each other, the first and second sidewalls through which a light passes; at least one light transmission membrane partitioning an inner space of the case into at least two liquid chambers, the at least one light transmission membrane through which a light passes; at least two liquids filled in the at least two liquid chambers; at least one first operating hole formed at the first sidewall; a first actuator disposed to cover the at least one first operating hole and to pressurize the liquid contacting the first sidewall; and a controller configured to control the first actuator to change a focal distance of an optical lens consisting of the first and second sidewalls, the at least two liquids, and the at least one light transmission membrane of the case.Type: GrantFiled: April 22, 2008Date of Patent: July 26, 2011Assignee: Samsung Electro Mechanics Co., LtdInventors: Seung-wan Lee, Jeong-yub Lee, Woon-bae Kim, Seung-tae Choi
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Publication number: 20110175132Abstract: An LED package and a fabrication method thereof are provided. The LED package includes an upper metal plate having an LED-receiving hole therein; a lower metal plate disposed under the upper metal plate; and an insulator which the upper metal plate and the lower metal plate from each other. A portion of the lower metal plate is exposed via the LED-receiving hole and an LED is mounted on the exposed portion of the lower metal plate and is electrically connected to both of the upper and lower metal plates. A protective cover encloses and protects exposed surfaces of the upper and lower metal plates.Type: ApplicationFiled: March 31, 2011Publication date: July 21, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ki-hwan KWON, Kyu-ho SHIN, Soon-cheol KWEON, Chang-youl MOON, Arthur DARBINIAN, Seung-tae CHOI, Su-ho SHIN
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Publication number: 20110116171Abstract: A multilayer electroactive polymer actuator and a method of manufacturing the same. The multilayer electroactive polymer actuator is divided into an actuating area and a non-actuating area. A plurality of driving electrodes, each formed on a side of the respective polymer layer to correspond to the actuating area. A plurality of extension electrodes connected to the driving electrodes and a common electrode for vertically connecting the extension electrodes are formed to correspond to the non-actuating area. A via hole is formed through the plurality of non-actuating layers and has a diameter which increases in a stepwise manner upwards. The common electrode is formed in the via hole. The driving electrode includes an alloy of aluminum and copper. The extension electrode is formed of material having a small reactivity with respect to laser as compared to the reactivity of the polymer layer.Type: ApplicationFiled: August 13, 2010Publication date: May 19, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jong-Oh KWON, Seung-Tae CHOI
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Patent number: 7928545Abstract: An LED package and a fabrication method thereof are provided. The LED package includes an upper metal plate having an LED-receiving hole therein; a lower metal plate disposed under the upper metal plate; and an insulator which the upper metal plate and the lower metal plate from each other. A portion of the lower metal plate is exposed via the LED-receiving hole and an LED is mounted on the exposed portion of the lower metal plate and is electrically connected to both of the upper and lower metal plates. A protective cover encloses and protects exposed surfaces of the upper and lower metal plates.Type: GrantFiled: May 3, 2006Date of Patent: April 19, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Ki-hwan Kwon, Kyu-ho Shin, Soon-cheol Kweon, Chang-youl Moon, Arthur Darbinian, Seung-tae Choi, Su-ho Shin
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Publication number: 20110051255Abstract: A fluidic lens and method for manufacturing the same are provided. The fluidic lens includes a transparent optical fluid and a double elastomer membrane. An outer membrane of the double elastomer membrane that is externally exposed includes a Poly DiMethyl Siloxane (PDMS) elastomer, and an inner membrane of the double elastmoer membrane that makes contact with the optical fluid is transparent and includes an elastomer which has a low coherence with respect to the optical fluid.Type: ApplicationFiled: May 26, 2010Publication date: March 3, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jeong-yub LEE, Seung-wan LEE, Seung-tae CHOI
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Publication number: 20110051254Abstract: A variable-focus liquid lens is provided. The liquid lens includes a membrane and a fluid. The membrane is made of a transparent elastomer, and the fluid fills a predetermined space to contact at least a lens surface of the membrane. The membrane and the fluid are respectively made of materials repulsive to each other, for example, hydrophilic and hydrophobic materials or oleophilic and oleophobic materials. Accordingly, a repulsive force between the fluid and the membrane can prevent the absorption or leaking of the fluid into/through the membrane.Type: ApplicationFiled: May 21, 2010Publication date: March 3, 2011Applicants: SAMSUNG ELECTRONICS CO., LTD., Industry-Academic Cooperation Foundation, Yonsei UniversityInventors: Jeong-yub LEE, Cheol-min PARK, Seung-tae CHOI, Seung-wan LEE, Jong-oh KWON, Hee-joon JUNG
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Publication number: 20110003412Abstract: An LED package includes a substrate having an electrically conductive portion and an electrically non-conductive portion composed of an oxide of the conductive portion; an LED mounted on the conductive portion and electrically connected to the conductive portion; a first electrode disposed on the non-conductive portion and electrically connected to the LED by a wire; and a second electrode disposed on the substrate and electrically connected to the LED.Type: ApplicationFiled: September 16, 2010Publication date: January 6, 2011Applicant: SAMSUNG LED Co., Ltd.Inventors: Su-ho SHIN, Soon-cheol Kweon, Kyu-ho Shin, Ki-hwan Kwon, Seung-tae Choi, Chang-youl Moon
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Patent number: 7821027Abstract: An LED package includes a substrate having an electrically conductive portion and an electrically non-conductive portion composed of an oxide of the conductive portion; an LED mounted on the conductive portion and electrically connected to the conductive portion; a first electrode disposed on the non-conductive portion and electrically connected to the LED by a wire; and a second electrode disposed on the substrate and electrically connected to the LED.Type: GrantFiled: April 21, 2006Date of Patent: October 26, 2010Assignee: Samsung LED Co., Ltd.Inventors: Su-ho Shin, Soon-cheol Kweon, Kyu-ho Shin, Ki-hwan Kwon, Seung-tae Choi, Chang-youl Moon
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Patent number: 7781788Abstract: A light emitting device package including a transparent cover having an electrode pattern formed on a bottom surface thereof; a light emitting device installed below the transparent cover and electrically connected to an external circuit via the electrode pattern; a fixing resin which fixes the light emitting device onto the bottom surface of the transparent cover; and a metal slug provided under the fixing resin to dissipate heat away from the light emitting device.Type: GrantFiled: July 31, 2006Date of Patent: August 24, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Arthur Darbinian, Seung Tae Choi, Ki Hwan Kwon, Chang Youl Moon, Kyu Ho Shin
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Publication number: 20100201227Abstract: Provided are a polymer and a polymer actuator including the polymer. The polymer is cross-linked by a cross-linking agent. When the polymer is used in the polymer actuator, the polymer actuator shows a high strain and may be stably operated at high temperatures.Type: ApplicationFiled: February 12, 2010Publication date: August 12, 2010Applicants: SAMSUNG ELECTRONICS CO., LTD., Sungkyunkwan University Foundation for Corporate CollaborationInventors: Seung-tae CHOI, Young-kwan LEE, Ja-Choon KOO, Jong-oh KWON, Su-jin PARK
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Publication number: 20100165475Abstract: Varifocal lens for camera module incorporated in wireless mobile communication device is provided. The varifocal lens includes: a membrane; a frame which is fixed to the membrane and has a receiving hole formed in the middle; a transparent substrate which is fixed to the frame to seal optical fluid received in the receiving hole; one or more actuators to change a curvature of a fluid lens part by bending the circumference of the fluid lens part formed around a central portion of the receiving hole; and a restriction lessening member which is adapted to lessen a restrictive force of an edge of the fluid lens part, is made of a transparent material, has with an area smaller than the fluid lens part to correspond to an inner side of the fluid lens part except the edge of the fluid lens part, and has a larger Young's modulus than the membrane.Type: ApplicationFiled: August 17, 2009Publication date: July 1, 2010Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Jeong-yub Lee, Seung-wan Lee, Woon-bae Kim, Seung-tae Choi
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Patent number: 7741774Abstract: A method of fabricating a backlight module in which at least one luminescence element is positioned, including: positioning a luminescence element in at least one cavity formed on a carrier; forming a lower electrode on a substrate; transferring the luminescence element positioned on the carrier to the substrate, connecting the luminescence element to a pattern of the lower electrode formed on the substrate, and removing the carrier; forming an insulating layer on a surface of the substrate to which the luminescence element is transferred, and exposing a top region of the luminescence element; and forming an upper electrode on the exposed top region of the luminescence element. Accordingly, the backlight module including very small luminescence elements being of a micro unit in size is easily fabricated.Type: GrantFiled: November 29, 2006Date of Patent: June 22, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Seung-tae Choi, Ki-hwan Kwon, Su-ho Shin, Ji-hyuk Lim, Chang-youl Moon, Kyu-ho Shin
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Publication number: 20100148635Abstract: A solid electrolyte polymer including a cross-linked polyvinylidene fluoride (PVDF)-based polymer, and a polymer actuator including the cross-linked PVDF-based polymer and an electrolytic material.Type: ApplicationFiled: December 8, 2009Publication date: June 17, 2010Applicants: Samsung Electronics Co., Ltd., Sungkyunkwan University Foundation for Corporate CollaborationInventors: Jong-oh Kwon, Seung-tae Choi, Young-kwan Lee, Ja-Choon Koo, Su-jin Park
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Publication number: 20100128359Abstract: Provided is a varifocal lens and method of manufacturing the varifocal lens. The varifocal lens includes a transparent substrate, a spacer frame arranged to form an inner space on the transparent substrate, wherein the inner space is to be filled with an optical fluid, a rigid frame disposed to be adjacent to the spacer frame, and an optical membrane and an actuator which are formed on a surface of the rigid frame. The rigid frame supports the actuator and the optical membrane, wherein the actuator applies a pressure to an optical fluid and the optical membrane is modified according to a flow of the optical fluid.Type: ApplicationFiled: November 25, 2009Publication date: May 27, 2010Applicant: Samsung Electronics Co., Ltd.Inventors: Seung-tae CHOI, Seung-wan LEE, Jeong-yub LEE, Jong-oh KWON
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Patent number: 7719167Abstract: An electroactive polymer actuator and a method for manufacturing the electroactive polymer actuator are provided. The electroactive polymer actuator includes an actuator unit which is a laminate of a plurality of deformation layers; and a support layer which supports the actuator unit so that the actuator unit provides displacement corresponding to a voltage if the voltage is applied to the actuator unit. Therefore, it is possible to provide an electroactive polymer actuator suitable for a compact mobile device with a low driving voltage.Type: GrantFiled: October 30, 2007Date of Patent: May 18, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-oh Kwon, Seung-tae Choi, Seung-wan Lee, Woon-bae Kim, Min-seog Choi
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Publication number: 20100110606Abstract: A tunable capacitor using an electrowetting phenomenon includes a first electrode; a second electrode which is spaced apart from the first electrode and faces the first electrode; a fluidic channel which is disposed between the first electrode and the second electrode; a first insulating layer which is disposed between the first electrode and the fluidic channel; and a conductive fluid which is disposed in the fluidic channel and moves along the fluidic channel when a direct current (DC) potential difference occurs between the first and second electrodes. Accordingly, it is possible to fabricate the tunable capacitor with the simplified fabrication process, good reliability and durability, and no restriction on the tuning range.Type: ApplicationFiled: January 6, 2010Publication date: May 6, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seung-tae CHOI, Ji-hyuk Lim, Woon-bae Kim, Eun-seok Park, Jeong-yub Lee
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Publication number: 20100046004Abstract: A pattern projecting apparatus usable with a three-dimensional imaging apparatus includes a light generator which emits a light beam, and a pattern adjusting unit disposed in front of the light generator. The pattern adjusting unit forms a projection pattern on an object, and adjusts a focus of the light beam emitted from the light generator.Type: ApplicationFiled: June 19, 2009Publication date: February 25, 2010Applicant: Samsung Electronics Co., Ltd.Inventors: Jeong-yub Lee, Seung-wan Lee, Woon-bae Kim, Seung-tae Choi
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Patent number: 7667946Abstract: A tunable capacitor using an electrowetting phenomenon includes a first electrode; a second electrode which is spaced apart from the first electrode and faces the first electrode; a fluidic channel which is disposed between the first electrode and the second electrode; a first insulating layer which is disposed between the first electrode and the fluidic channel; and a conductive fluid which is disposed in the fluidic channel and moves along the fluidic channel when a direct current (DC) potential difference occurs between the first and second electrodes. Accordingly, it is possible to fabricate the tunable capacitor with the simplified fabrication process, good reliability and durability, and no restriction on the tuning range.Type: GrantFiled: April 3, 2007Date of Patent: February 23, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Seung-tae Choi, Ji-hyuk Lim, Woon-bae Kim, Eun-seok Park, Jeong-yub Lee
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Patent number: 7649672Abstract: A MEMS structure includes an element substrate, an electrode pad formed on the element substrate, a MEMS activated element formed on the element substrate, and having an electrode-connecting layer, and a connecting line to electrically connect the electrode pad and the electrode-connecting layer.Type: GrantFiled: October 19, 2006Date of Patent: January 19, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Young-tack Hong, Jong-seok Kim, In-sang Song, Sang-wook Kwon, Seung-jin Oh, Eun-sung Lee, Seung-tae Choi