Patents by Inventor Dae Woong Choi
Dae Woong 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: 20240192621Abstract: A toner external additive composition of the present invention comprises, as a core component, tin oxide, to be usable as an alternative material for conventional titanium dioxide (TiO2), and thus can respond to future regulations on titanium dioxide and environment. In addition, the toner external additive composition and a toner composition comprising same comprise, as a shell component, a silane-based compound and aluminum hydroxide to reduce triboelectric charge so that a ghost phenomenon is alleviated and increase image density so that print quality is improved. Particularly, if aluminum hydroxide is used in a specific amount range, a print quality improvement effect can be further improved.Type: ApplicationFiled: May 18, 2022Publication date: June 13, 2024Applicant: LOTTE FINE CHEMICAL CO., LTD.Inventors: Dae Woong Choi, Ji Soo Lee
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Publication number: 20240001408Abstract: An apparatus for manufacturing a semiconductor device, including: a wet treatment chamber; a nozzle provided in the wet treatment chamber and configured to spray a treatment material onto a substrate; a supercritical fluid treatment chamber configured to supply a supercritical fluid onto the substrate to treat the substrate; a transfer device comprising an arm configured to transfer the substrate between the wet treatment chamber and the supercritical fluid treatment chamber; and a controller configured to control the wet treatment chamber to spray the treatment material onto the armType: ApplicationFiled: July 3, 2023Publication date: January 4, 2024Applicant: Samsung Electronics Co., Ltd.Inventors: Dae-Woong CHOI, Yong Myung JUN, Hyun-Chul KIM, Chang Seok SEO, Chan JEON, Woo Seok CHOE, In Sung HUH
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Patent number: 9916044Abstract: An information processing device is provided. The device comprises a 3D sensor configured to acquire depth information of a user's hand image and depth information of a background image on an object plane; a storage device in which a character input application is stored; a processor configured to execute the character input application; and a display configured to display a virtual keyboard by executing the character input application.Type: GrantFiled: December 3, 2015Date of Patent: March 13, 2018Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, SEJONG CAMPUSInventors: Hyeonjoong Cho, Dae-Woong Choi
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Publication number: 20160085379Abstract: An information processing device is provided. The device comprises a 3D sensor configured to acquire depth information of a user's hand image and depth information of a background image on an object plane; a storage device in which a character input application is stored; a processor configured to execute the character input application; and a display configured to display a virtual keyboard by executing the character input application.Type: ApplicationFiled: December 3, 2015Publication date: March 24, 2016Applicant: Korea University Research and Business FoundationInventors: Hyeonjoong Cho, Dae-Woong Choi
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Publication number: 20140004457Abstract: A polymerization toner having superior chargeability and storage stability is provided. The polymerization toner includes a binder resin and a colorant, wherein the binder resin has a dielectric constant ranging from 2.8 to 3.7.Type: ApplicationFiled: December 21, 2011Publication date: January 2, 2014Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Jae Bum Park, Young Jae Kwon, Dong Woo Kim, Dae Woong Choi
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Patent number: 8603717Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.Type: GrantFiled: July 22, 2009Date of Patent: December 10, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Jae Bum Park, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20130273472Abstract: Provided is a method for manufacturing a toner. By using a wax dispersion liquid containing silica, the toner which does not have an unpleasant odor can be achieved without influencing other physical properties of the toner.Type: ApplicationFiled: December 21, 2011Publication date: October 17, 2013Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Jae Bum Park, Young Jae Kwon, Dae Woong Choi, Dong Woo Kim
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Publication number: 20130273466Abstract: Provided is a toner particle having excellent environmental resistance, fluidity, and chargeability for developing an electrostatic image. The toner particle comprises a coupling resin, a release agent, and a coloring agent, and satisfies Formula (1) below: 8.5?SMF?10.5??(1), wherein the surface morphology factor (SMF) of the formula can be represented by following Formula (2): SMF=?log(4/3×?×D3×RD×B×C) [m2/ea]??(2).Type: ApplicationFiled: December 21, 2011Publication date: October 17, 2013Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Dae Woong Choi, Jae Bum Park, Dong Woo Kim, Young Jae Kwon
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Patent number: 8492060Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.Type: GrantFiled: June 4, 2009Date of Patent: July 23, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8475995Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.Type: GrantFiled: October 22, 2008Date of Patent: July 2, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8389188Abstract: Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.Type: GrantFiled: October 22, 2008Date of Patent: March 5, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dong Won Kim, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Duck Kyun Ahn
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Patent number: 8389196Abstract: Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed.Type: GrantFiled: September 19, 2008Date of Patent: March 5, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20120301819Abstract: Provided is a toner having excellent blocking resistance and flowability. The toner comprises a binder resin, a releasing agent, a colorant and an external additive, wherein the toner particles satisfy expression (1): 2.0?RD/TD?2.5 ??(1), where RD is the real density of the toner particles and TD is the tap density of the toner particles.Type: ApplicationFiled: February 1, 2011Publication date: November 29, 2012Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Dae Woong Choi, Jae Bum Park, Young Jae Kwon
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Publication number: 20120244467Abstract: Toner particles having excellent cleaning properties and glossing properties. The toner particles include a binder resin, a releasing agent, and a colorant, wherein toner particles satisfy the following conditions. 50° C.?T1/2?Tg?100° C.??(1) 50° C.?Tg60° C.Type: ApplicationFiled: December 16, 2010Publication date: September 27, 2012Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Jae Bum Park, Young Jae Kwon, Dae Woong Choi
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Publication number: 20110159424Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.Type: ApplicationFiled: June 4, 2009Publication date: June 30, 2011Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20110116841Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.Type: ApplicationFiled: July 22, 2009Publication date: May 19, 2011Applicant: Samsung Fine Chemicals Co., Ltd.Inventors: Jae Bum Park, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20110033207Abstract: A toner using an organic solvent-insoluble resin and a method of preparing the same. The toner includes: a binder resin that comprises an organic solvent-insoluble resin and an acid group-containing resin, a coloring agent, and at least one additive, wherein the organic solvent-insoluble resin is a crosslinked polyester resin or a cyclic olefin co-polymer (COC) resin, and the ratio of the organic solvent-insoluble resin to the acid group-containing resin is in the range of 5:95 to 40:60 on a weight basis. The toner can be applied to an electrophotographic imaging apparatus.Type: ApplicationFiled: March 26, 2009Publication date: February 10, 2011Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Duck Kyun Ahn, Woo Young Yang, Keon II Kim, Dae II Hwang, II Hyuk Kim, Jae Bum Park, II Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim
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Publication number: 20100239972Abstract: Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.Type: ApplicationFiled: October 22, 2008Publication date: September 23, 2010Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Dong Won Kim, Woo Young Yang, Keon II Kim, Dae II Hwang, II Hyuk Kim, Jae Bum Park, II Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Duck Kyun Ahn
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Publication number: 20100232837Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.Type: ApplicationFiled: October 22, 2008Publication date: September 16, 2010Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100216069Abstract: Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed.Type: ApplicationFiled: September 19, 2008Publication date: August 26, 2010Applicant: Samsung Fine Chemicals Co. LTdInventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn