Patents by Inventor Chul Am Kim
Chul Am Kim 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: 20220276543Abstract: Proposed are a display panel structure consisting of a composite material phase and capable of implementing four full colors and a transmission mode conversion, and a driving method therefor enabling conversion to a reflection mode, a shielding mode, and the transmission mode. The display panel structure includes: an upper substrate; a lower substrate; an upper electrode disposed on a surface of the upper substrate; a lower electrode disposed on a surface of the lower substrate; and a partition wall defining a unit cell region formed between the upper substrate and the lower substrate. The unit cell region includes a plurality of first particles exhibiting a first color, a plurality of second particles exhibiting a second color, a plurality of third particles exhibiting a third color, and a plurality of fourth particles exhibiting a fourth color, the first, second, third, and fourth particles being dispersed in a fluid.Type: ApplicationFiled: November 14, 2019Publication date: September 1, 2022Inventors: Dong Jin LEE, Chul Am KIM, Hyo Sun BAE
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Patent number: 9753334Abstract: Provided are a display device and a method of manufacturing the same. The display device includes a first substrate, a second substrate facing the first substrate and separated from the first substrate, a plurality of liquid crystal parts disposed between the first and second substrates, and separated in a horizontal direction from each other, spacers for separating the liquid crystal parts between the first and the second substrates, and immobilization patterns disposed in each of the liquid crystal parts, and including an optically active material.Type: GrantFiled: March 8, 2016Date of Patent: September 5, 2017Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Gi Heon Kim, Hojun Ryu, Won Jae Lee, Yong Hae Kim, Chul Am Kim
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Publication number: 20160187687Abstract: Provided are a display device and a method of manufacturing the same. The display device includes a first substrate, a second substrate facing the first substrate and separated from the first substrate, a plurality of liquid crystal parts disposed between the first and second substrates, and separated in a horizontal direction from each other, spacers for separating the liquid crystal parts between the first and the second substrates, and immobilization patterns disposed in each of the liquid crystal parts, and including an optically active material.Type: ApplicationFiled: March 8, 2016Publication date: June 30, 2016Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Gi Heon KIM, Hojun RYU, Won Jae LEE, Yong Hae KIM, Chul Am KIM
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Patent number: 9310650Abstract: Provided are a display device and a method of manufacturing the same. The display device includes a first substrate, a second substrate facing the first substrate and separated from the first substrate, a plurality of liquid crystal parts disposed between the first and second substrates, and separated in a horizontal direction from each other, spacers for separating the liquid crystal parts between the first and the second substrates, and immobilization patterns disposed in each of the liquid crystal parts, and including an optically active material.Type: GrantFiled: May 21, 2014Date of Patent: April 12, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Gi Heon Kim, Hojun Ryu, Won Jae Lee, Yong Hae Kim, Chul Am Kim
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Publication number: 20150146134Abstract: Provided are a liquid crystal display device and a liquid crystal display device including the same. The liquid crystal display device includes a first substrate, a second substrate facing and separated from the first substrate, a liquid crystal layer disposed between the first and second substrates, and a light source providing light to the liquid crystal layer. The liquid crystal layer includes cholesteric liquid crystal and a dichromic dye. The cholesteric liquid crystal includes nematic liquid crystal and an optically active material, and selectively reflects light having a certain wavelength, and the dichromic dye transmits light selectively reflected from the cholesteric liquid crystal. An amount of the dichromic dye is about 0.01 to about 10 wt % based on a total amount of the liquid crystal layer.Type: ApplicationFiled: May 15, 2014Publication date: May 28, 2015Applicant: Electronics and Telecommunications Research InstituteInventors: Gi Heon KIM, Won Jae LEE, Chul Am KIM, Hojun RYU
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Publication number: 20150146153Abstract: Provided are a display device and a method of manufacturing the same. The display device includes a first substrate, a second substrate facing the first substrate and separated from the first substrate, a plurality of liquid crystal parts disposed between the first and second substrates, and separated in a horizontal direction from each other, spacers for separating the liquid crystal parts between the first and the second substrates, and immobilization patterns disposed in each of the liquid crystal parts, and including an optically active material.Type: ApplicationFiled: May 21, 2014Publication date: May 28, 2015Applicant: Electronics and Telecommunications Research InstituteInventors: Gi Heon KIM, Hojun RYU, Won Jae LEE, Yong Hae KIM, Chul Am KIM
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Publication number: 20140160551Abstract: Provided are methods of modifying a surface of carbon black and display devices with the carbon black. The display device may include an upper electrode, a lower electrode spaced apart from and facing the upper electrode, and a pigment between the upper and lower electrodes to include a plurality of micro-capsules. Each of the micro-capsules may include carbon black, whose surface may be modified to have hydrophobicity.Type: ApplicationFiled: September 3, 2013Publication date: June 12, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Chul Am KIM, Joo Yeon KIM, Hojun RYU
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Patent number: 8493648Abstract: Provided are a method of fabricating an electrophoretic ink, the electrophoretic ink formed using the method, and an electrophoretic display having the same. The method of fabricating an electrophoretic ink includes dispersing pigment particles into a dielectric fluid; adding at least one monomer and an initiator into the dielectric fluid; and forming polymeric membranes surrounding the pigment particles in the dielectric fluid. Since the pigment particle surrounded by the polymeric membrane and the dielectric fluid in which the pigment particle is dispersed can be utilized as the electrophoretic ink as they are without a follow-up cleaning process, the method of fabricating the electrophoretic ink is simplified.Type: GrantFiled: April 22, 2010Date of Patent: July 23, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Chul Am Kim, Hyeonjung Yoo, Kyung Soo Suh, Seung Youl Kang
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Publication number: 20130163067Abstract: Color electronic paper displays are provided. The color electronic paper display includes a substrate, a plurality of black matrices arrayed with a certain distance therebetween on the substrate, and electronic ink microcapsules between the black matrices. The black matrices cover interconnection lines disposed on the substrate. The electronic ink microcapsules include at least one first microcapsule containing white particles and yellow particles, at least one second microcapsule containing white particles and magenta particles, and at least one third microcapsule containing white particles and cyan particles. Related methods are also provided.Type: ApplicationFiled: September 7, 2012Publication date: June 27, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Chul Am KIM, Jiyoung Oh
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Publication number: 20130153406Abstract: Methods of manufacturing metal oxide nanoparticles are provided. The method uses a bubble generation ultrasonic synthesis method. A gas is injected into a metal oxide preliminary composition solution to promote length growth of nanoparticles. After a basic chemical species solution is mixed with the metal oxide preliminary composition solution, ultrasonic waves are applied to form a reactant. The reactant is refined to manufacture metal oxide nanoparticles. The nanoparticles may have excellent dispersibility and a uniform thin film may be formed by the nanoparticles.Type: ApplicationFiled: September 10, 2012Publication date: June 20, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jiyoung Oh, SangChul Lim, Chul Am Kim
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Patent number: 8421610Abstract: Provided are a touch screen and a method of operating the same. The touch screen includes a detecting part, a control part, and a tactile feedback part. The detecting part detects object's approach or contact. The control part receives a signal of the detecting part to output a feedback signal. The tactile feedback part receives the feedback signal of the control part to provide a tactile feedback to a contact position using a magnetic force. The tactile feedback uses the magnetic force of a magnetic dipole.Type: GrantFiled: August 3, 2009Date of Patent: April 16, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Seongdeok Ahn, In-Kyu You, Jiyoung Oh, Chul Am Kim, Jae Bon Koo, Sang Seok Lee, Kyung Soo Suh, Kyoung Ik Cho
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Patent number: 8206536Abstract: A method of stacking a flexible substrate is provided. The method includes the steps of: preparing a carrier substrate; stacking an adhesive layer on the carrier substrate; and stacking a flexible substrate having at least one image display device on the adhesive layer using a laminating or pressing method. Thus, the flexible substrate is easily fabricated without modification of conventional mass-production equipment for fabricating a display, and thereby a lightweight, thin, and compact flexible display can be realized.Type: GrantFiled: September 13, 2011Date of Patent: June 26, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Gi Heon Kim, Yong Hae Kim, Dong Jin Park, Chul Am Kim, Kyung Soo Suh
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Publication number: 20120154900Abstract: Provided is a display device, which includes a plurality of charged pigment particles, a dielectric medium dispersing the charged pigment particles, and a micro capsules surrounding the charged pigment particles and the dielectric medium. The dielectric medium includes an ester-based fluid having high permittivity.Type: ApplicationFiled: December 21, 2011Publication date: June 21, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventor: Chul Am KIM
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Patent number: 8133722Abstract: Provided are a cell culture compartment unit and an array including the same. The cell culture compartment unit includes: a cell culture region and a bio material emission region including a cell culture fluid, which are separated with a porous membrane therebetween; a piezoelectric device on the porous membrane of the cell culture region; a thin layer for cell attachment being on the piezoelectric device and having at least one surface on which cells are attachable; and a first power supply applying a first electric field to the piezoelectric device.Type: GrantFiled: December 10, 2009Date of Patent: March 13, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Sanghee Kim, Chul Am Kim, Chang-Geun Ahn, Moon Youn Jung
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Publication number: 20120000602Abstract: A method of stacking a flexible substrate is provided. The method includes the steps of: preparing a carrier substrate; stacking an adhesive layer on the carrier substrate; and stacking a flexible substrate having at least one image display device on the adhesive layer using a laminating or pressing method. Thus, the flexible substrate is easily fabricated without modification of conventional mass-production equipment for fabricating a display, and thereby a lightweight, thin, and compact flexible display can be realized.Type: ApplicationFiled: September 13, 2011Publication date: January 5, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Gi Heon KIM, Yong Hae KIM, Dong Jin PARK, Chul Am KIM, Kyung Soo SUH
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Patent number: 8047849Abstract: Provided are a braille display device using an electrorheological fluid and a method for manufacturing the same. The braille display device includes: a base body in which a plurality of insulating reception grooves are formed; a first electrode arranged below the base body; an electrorheological fluid received in the reception groove; a microcapsule having an electrophoresis particle which is dispersed in the electrorheological fluid; a second electrode arranged above the microcapsule; a braille pin installed above the second electrode; and a braille pin protection film arranged above the braille pin.Type: GrantFiled: December 5, 2007Date of Patent: November 1, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Seong Deok Ahn, Seung Youl Kang, Chul Am Kim, Ji Young Oh, In Kyu You, Gi Heon Kim, Kyu Ha Baek, Kyung Soo Suh
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Patent number: 8049953Abstract: Provided is a microcapsule patterning method for patterning electrophoretic microcapsules on a substrate, the method including the steps of: preparing a microcapsule slurry in which microcapsules and a water-soluble binder are mixed; putting the microcapsule slurry into a liquid ejector having injection and ejection ports formed therein; and applying the microcapsule slurry contained in the liquid ejector onto the substrate so as to pattern pixels using the microcapsules. Accordingly, specific patterns are formed without physical and chemical damage to the microcapsules. Therefore, the patterns can be used as pixels of flat panel displays. Further, through the patterning, it is possible to implement a color display device which does not exhibit performance degradation.Type: GrantFiled: September 18, 2007Date of Patent: November 1, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Chul Am Kim, Seung Youl Kang, Hey Jin Myoung, Kyung Soo Suh, Seong Deok Ahn, Gi Heon Kim, In Kyu You, Ji Young Oh
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Patent number: 8038820Abstract: A method of stacking a flexible substrate is provided. The method includes the steps of: preparing a carrier substrate; stacking an adhesive layer on the carrier substrate; and stacking a flexible substrate having at least one image display device on the adhesive layer using a laminating or pressing method. Thus, the flexible substrate is easily fabricated without modification of conventional mass-production equipment for fabricating a display, and thereby a lightweight, thin, and compact flexible display can be realized.Type: GrantFiled: July 9, 2007Date of Patent: October 18, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Gi Heon Kim, Yong Hae Kim, Dong Jin Park, Chul Am Kim, Kyung Soo Suh
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Publication number: 20110122480Abstract: Provided are a method of fabricating an electrophoretic ink, the electrophoretic ink formed using the method, and an electrophoretic display having the same. The method of fabricating the electrophoretic ink includes dispersing a pigment particle into a dielectric fluid for the electrophoretic ink and adding at least monomer and initiator to the dielectric fluid to form a polymeric membrane surrounding the pigment particle. Since the pigment particle surrounded by the polymeric membrane and the dielectric fluid in which the pigment particle is dispersed can be utilized as the electrophoretic ink as they are, the method of fabricating the electrophoretic ink is simplified.Type: ApplicationFiled: April 22, 2010Publication date: May 26, 2011Applicant: ELECTRONICS AND TELECOMMUNICATONS RESEARCH INSTITUTEInventors: Chul Am KIM, Hyeonjung Yoo, Kyung Soo Suh, Seung Youl Kang
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Patent number: 7903321Abstract: Provided are a color electrophoretic display and a method of manufacturing the same. The color electrophoretic display includes: a plurality of lower electrodes arranged on a lower layer and disposed with a predetermined interval therebetween; a plurality of first to third photoresist chambers arranged on the plurality of lower electrodes; first to third electronic inks accommodated in the plurality of first to third photoresist chambers respectively, and discriminatively operating to an electric field to independently display red, green, and blue colors; and a plurality of upper electrodes disposed with a predetermined interval therebetween and facing the plurality of lower electrodes with the plurality of first to third photoresist chambers being held therebetween.Type: GrantFiled: July 1, 2009Date of Patent: March 8, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Seong Deok Ahn, Seung Youl Kang, Chul Am Kim, In Kyu You, Gi Heon Kim, Ji Young Oh, Kyu Ha Baek, Kyung Soo Suh