Patents by Inventor Byoung-ho Cheong
Byoung-ho Cheong 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: 10654130Abstract: A polarization module and a laser exposure apparatus have a polarization module including a first lens and a second lens that reduce a one-directional length of a cross-section of an incident laser beam having an optical axis. A polarization beam splitter divides the laser beam passing through the first and second lenses into two laser beams that are polarized in different directions with respect to each other. A first prism lens and a second prism lens emit an output laser beam by controlling the two laser beams that are divided by the polarization beam splitter to positions that are symmetrical with respect to the optical axis. At least one half wave plate is disposed between the polarization beam splitter and the first prism lens.Type: GrantFiled: June 7, 2016Date of Patent: May 19, 2020Assignee: SAMSUNG DISPLAY CO., LTDInventors: Joo Woan Cho, Byoung Ho Cheong, Oleg Prudnikov, Jeong Kyun Na, Joon-Hwa Bae, Seung Hwan Lee, Byoung Kwon Choo
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Patent number: 10347484Abstract: A laser crystallizing apparatus includes a laser generator that generates an incident laser beam that includes a P polarization component and an S polarization component, an optical system that converts the incident laser beam to generate an emitted laser beam, and a stage on which is mounted a target substrate with a target thin film which is laser-crystallized by being irradiated by the emitted laser beam. The optical system includes at least one half wave plate (HWP) that shifts a polarization axis direction of the incident laser beam received from the laser generator, at least one mirror that fully reflects the laser beam, and at least one polarization beam splitter (PBS) which reflects a part of the laser beam and transmits the other part of the laser beam.Type: GrantFiled: March 29, 2016Date of Patent: July 9, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Joo Woan Cho, Jeong Kyun Na, Seung Hwan Lee, Joon-Hwa Bae, Byoung Ho Cheong, Byoung Kwon Choo, Oleg Prudnikov
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Patent number: 9982165Abstract: A polishing slurry for silicon, a method of polishing polysilicon, and a method of manufacturing a thin film transistor substrate, the slurry including a polishing particle; a dispersing agent including an anionic polymer, a hydroxyl acid, or an amino acid; a stabilizing agent including an organic acid, the organic acid including a carboxyl group; a hydrophilic agent including a hydrophilic group and a hydrophobic group, and water, wherein the polishing particle is included in the polishing slurry in an amount of about 0.1% by weight to about 10% by weight, based on a total weight of the slurry, a weight ratio of the polishing particle and the dispersing agent is about 1:0.01 to about 1:0.2, a weight ratio of the polishing particle and the stabilizing agent is about 1:0.001 to about 1:0.1, and a weight ratio of the polishing particle and the hydrophilic agent is about 1:0.01 to about 1:3.Type: GrantFiled: November 18, 2016Date of Patent: May 29, 2018Assignees: SAMSUNG DISPLAY CO., LTD., UBmaterials Inc.Inventors: Byoung-Kwon Choo, Jin-Hyung Park, Jeong-Kyun Na, Joon-Hwa Bae, Byoung-Ho Cheong, Joo-Woan Cho, In-Sun Hwang
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Patent number: 9768019Abstract: A laser crystallization method includes forming a plurality of first protrusions and depressions on a surface of an amorphous silicon layer, wherein a first protrusion and an adjacent first depression of the plurality of first protrusions and depressions, together, have a first pitch, and irradiating the amorphous silicon layer with a laser beam to form a polycrystalline silicon layer.Type: GrantFiled: May 19, 2016Date of Patent: September 19, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Joon-Hwa Bae, Byoung Kwon Choo, Jeong Kyun Na, Byoung Ho Cheong, Joo Woan Cho
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Publication number: 20170145259Abstract: A polishing slurry for silicon, a method of polishing polysilicon, and a method of manufacturing a thin film transistor substrate, the slurry including a polishing particle; a dispersing agent including an anionic polymer, a hydroxyl acid, or an amino acid; a stabilizing agent including an organic acid, the organic acid including a carboxyl group; a hydrophilic agent including a hydrophilic group and a hydrophobic group, and water, wherein the polishing particle is included in the polishing slurry in an amount of about 0.1% by weight to about 10% by weight, based on a total weight of the slurry, a weight ratio of the polishing particle and the dispersing agent is about 1:0.01 to about 1:0.2, a weight ratio of the polishing particle and the stabilizing agent is about 1:0.001 to about 1:0.1, and a weight ratio of the polishing particle and the hydrophilic agent is about 1:0.01 to about 1:3.Type: ApplicationFiled: November 18, 2016Publication date: May 25, 2017Inventors: Byoung-Kwon CHOO, Jin-Hyung PARK, Jeong-Kyun NA, Joon-Hwa BAE, Byoung-Ho CHEONG, Joo-Woan CHO, In-Sun HWANG
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Publication number: 20170125246Abstract: A laser crystallization method includes forming a plurality of first protrusions and depressions on a surface of an amorphous silicon layer, wherein a first protrusion and an adjacent first depression of the plurality of first protrusions and depressions, together, have a first pitch, and irradiating the amorphous silicon layer with a laser beam to form a polycrystalline silicon layer.Type: ApplicationFiled: May 19, 2016Publication date: May 4, 2017Inventors: JOON-HWA BAE, BYOUNG KWON CHOO, JEONG KYUN NA, BYOUNG HO CHEONG, JOO WOAN CHO
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Patent number: 9620361Abstract: An apparatus for crystallizing an active layer of a thin film transistor, the apparatus includes a first laser irradiating a first beam toward a substrate, an amorphous layer on the substrate being crystallizable into the active layer of the thin film transistor by the first beam, and a second laser irradiating a second beam toward the substrate to heat the active layer, the second beam having an asymmetric intensity profile in a scanning direction of the first and second beams.Type: GrantFiled: January 20, 2015Date of Patent: April 11, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Byoung-Kwon Choo, Sang-Hoon Ahn, Byoung-Ho Cheong, Joo-Woan Cho, Hyun-Jin Cho, Soo-Yeon Han
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Publication number: 20170087664Abstract: A polarization module and a laser exposure apparatus have a polarization module including a first lens and a second lens that reduce a one-directional length of a cross-section of an incident laser beam having an optical axis. A polarization beam splitter divides the laser beam passing through the first and second lenses into two laser beams that are polarized in different directions with respect to each other. A first prism lens and a second prism lens emit an output laser beam by controlling the two laser beams that are divided by the polarization beam splitter to positions that are symmetrical with respect to the optical axis. At least one half wave plate is disposed between the polarization beam splitter and the first prism lens.Type: ApplicationFiled: June 7, 2016Publication date: March 30, 2017Inventors: JOO WOAN CHO, BYOUNG HO CHEONG, OLEG PRUDNIKOV, JEONG KYUN NA, JOON-HWA BAE, SEUNG HWAN LEE, BYOUNG KWON CHOO
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Publication number: 20170062248Abstract: A laser crystallizing apparatus includes a laser generator that generates an incident laser beam that includes a P polarization component and an S polarization component, an optical system that converts the incident laser beam to generate an emitted laser beam, and a stage on which is mounted a target substrate with a target thin film which is laser-crystallized by being irradiated by the emitted laser beam. The optical system includes at least one half wave plate (HWP) that shifts a polarization axis direction of the incident laser beam received from the laser generator, at least one mirror that fully reflects the laser beam, and at least one polarization beam splitter (PBS) which reflects a part of the laser beam and transmits the other part of the laser beam.Type: ApplicationFiled: March 29, 2016Publication date: March 2, 2017Inventors: JOO WOAN CHO, Jeong Kyun Na, Seung Hwan Lee, Joon-Hwa Bae, Byoung Ho Cheong, Byoung Kwon Choo, Oleg Prudnikov
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Patent number: 9512982Abstract: A backlight assembly includes a light source unit configured to supply light, a light guide plate configured to guide light incident from the light source unit to an upper surface thereof, a reverse prism sheet disposed on the light guide plate and having a prism-shaped lower surface and an auxiliary film disposed between the light guide plate and the reverse prism sheet, in which the light guide plate includes a light-incident portion on which light is incident from the light source unit and a light-facing portion facing the light-incident portion.Type: GrantFiled: November 26, 2012Date of Patent: December 6, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jae Ho You, Hyun Deok Im, Byoung Ho Cheong
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Patent number: 9494814Abstract: The present invention provides a display device including: a plurality of display panels including display areas, and non-display areas positioned alongside the display areas; an optical member having one side connected to a part of one of the display areas and an opposing side extending over an adjacent non-display area, the optical member configured to magnify an image from the part of one of the display areas and to project the magnified image over the adjacent non-display area. A multi panel display device according to the exemplary embodiment of the present invention may prevent the phenomena of image discontinuity and image distortion at edges between the display panels, and adjust a polarization characteristic to provide a high-quality large screen capable of implementing a 3D image and the like.Type: GrantFiled: January 17, 2014Date of Patent: November 15, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Byung Han Yoo, Byoung Ho Cheong, Oleg Prudnikov, Dae Ho Yoon, Moon Gyu Lee, Hyeong Gyu Jang
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Patent number: 9417372Abstract: A lighting unit for a display device includes: a plurality of light sources which emits light; a wedge-shaped light guide having an incident surface disposed close to the light sources and an opposing surface disposed opposite the incident surface; and a lens sheet disposed on the light guide, where the lens sheet includes a plurality of lenses, each having an axis in a direction from the incident surface to the opposing surface, where the light guide is thinner at the incident surface than at the opposing surface, and a radius of curvature of each of the lenses is larger at the incident surface than the opposing surface.Type: GrantFiled: August 8, 2013Date of Patent: August 16, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyun Deok Im, Hyun Jin Cho, Oleg Prudnikov, Dae Ho Yoon, Byoung Ho Cheong
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Patent number: 9235055Abstract: A light source assembly including a light source part, a light guide plate and a light-condensing sheet. The light source assembly generates light and includes at least one light source. The light guide plate includes an incident surface to which the light is incident, an opposing surface which is opposite to the incident surface, and an exiting surface which emits the light, and has a thickness which is gradually increased from the incident surface to the opposing surface. The light-condensing sheet includes a plurality of reverse prism patterns which protrude toward the exiting surface, extend along an arc of a circle, and are arranged in a concentric circle structure.Type: GrantFiled: August 21, 2012Date of Patent: January 12, 2016Assignee: Samsung Display Co., Ltd.Inventors: Hyun-Deok Im, Guk-Hyun Kim, Jung-Hyun Cho, Moon-Jung Baek, Byoung-Ho Cheong, Seong-Mo Hwang, Oleg Prudnikov
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Publication number: 20150348782Abstract: An apparatus for crystallizing an active layer of a thin film transistor, the apparatus includes a first laser irradiating a first beam toward a substrate, an amorphous layer on the substrate being crystallizable into the active layer of the thin film transistor by the first beam, and a second laser irradiating a second beam toward the substrate to heat the active layer, the second beam having an asymmetric intensity profile in a scanning direction of the first and second beams.Type: ApplicationFiled: January 20, 2015Publication date: December 3, 2015Inventors: Byoung-Kwon CHOO, Sang-Hoon AHN, Byoung-Ho CHEONG, Joo-Woan CHO, Hyun-Jin CHO, Soo-Yeon HAN
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Publication number: 20150159300Abstract: A laser crystallization apparatus and an organic light-emitting diode (OLED) display manufactured using the same are disclosed. In one aspect, the apparatus includes a stage configured to receive a target substrate having an amorphous silicon layer formed thereon and a first laser unit configured to crystalize the amorphous silicon layer so as to form a polycrystalline silicon layer. The polycrystalline silicon layer includes a plurality of protrusions. The apparatus also includes a second laser unit configured to remove at least part of the protrusions.Type: ApplicationFiled: April 28, 2014Publication date: June 11, 2015Applicant: Samsung Display Co., Ltd.Inventors: Joo Woan Cho, Byoung Ho Cheong, Byoung Kwon Choo
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Publication number: 20150055218Abstract: The present invention provides a display device including: a plurality of display panels including display areas, and non-display areas positioned alongside the display areas; an optical member having one side connected to a part of one of the display areas and an opposing side extending over an adjacent non-display area, the optical member configured to magnify an image from the part of one of the display areas and to project the magnified image over the adjacent non-display area. A multi panel display device according to the exemplary embodiment of the present invention may prevent the phenomena of image discontinuity and image distortion at edges between the display panels, and adjust a polarization characteristic to provide a high-quality large screen capable of implementing a 3D image and the like.Type: ApplicationFiled: January 17, 2014Publication date: February 26, 2015Applicant: Samsung Display Co., Ltd.Inventors: Byung Han YOO, Byoung Ho CHEONG, Oleg PRUDNIKOV, Dae Ho YOON, Moon Gyu LEE, Hyeong Gyu JANG
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Patent number: 8941799Abstract: Provided is a liquid crystal display including: a lower display panel including a lower insulating substrate and a lower reflective layer; an upper display panel including an upper insulating substrate and an upper reflective layer; a liquid crystal layer positioned between the lower reflective layer of the lower display panel and the upper reflective layer of the upper display panel; and a backlight unit positioned on a lower portion of the lower display panel and including a light source, wherein a pair of field generating electrodes are formed in at least one display panel of the lower display panel and the upper display panel, wherein microcavities are formed in the lower reflective layer, the upper reflective layer, and the liquid crystal layer, and wherein a wavelength and luminance of light resonated and emitted in the microcavities are changed by an electric field generated by the field generating electrodes.Type: GrantFiled: March 15, 2013Date of Patent: January 27, 2015Assignee: Samsung Display Co., Ltd.Inventors: Jae Ho You, Hyun Jin Cho, Dae Ho Yoon, Moon Gyu Lee, Byoung Ho Cheong
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Patent number: 8801209Abstract: A backlight assembly and a display device having the same are provided. The backlight assembly includes a first substrate, point light sources disposed upon the first substrate and an optical member covering the point light sources to guide light emitted from the point light sources, wherein the first substrate has recessed portions, and the point light sources are positioned within the recessed portions.Type: GrantFiled: September 14, 2011Date of Patent: August 12, 2014Assignee: Samsung Display Co., Ltd.Inventors: Hyun-Deok Im, Byoung-Ho Cheong, Young-Chan Kim, Seung-Won Park
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Publication number: 20140146564Abstract: A backlight unit includes a light source part, a light guide plate, a prism sheet, and a reflecting element. The light source part is configured to provide light. The light guide plate includes: a light incident portion disposed adjacent to the light source part, a corresponding portion spaced apart from and facing the light incident portion, a light exiting surface, and a bottom surface spaced apart from and facing the light exiting surface. A thickness of the light incident portion is greater than a thickness of the corresponding portion. The prism sheet is disposed on the light guide plate. The prism sheet includes a plurality of prisms extending toward the light guide plate. The reflecting element is disposed under the light guide plate. The reflecting element is configured to reflect at least some of the light toward the light guide plate.Type: ApplicationFiled: August 21, 2013Publication date: May 29, 2014Applicant: Samsung Display Co., Ltd.Inventors: Hyun-Deok IM, Oleg Prudnikov, Byoung-Ho Cheong, Hyun-Jin Cho, Guk-Hyun Kim
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Publication number: 20140049724Abstract: Provided is a liquid crystal display including: a lower display panel including a lower insulating substrate and a lower reflective layer; an upper display panel including an upper insulating substrate and an upper reflective layer; a liquid crystal layer positioned between the lower reflective layer of the lower display panel and the upper reflective layer of the upper display panel; and a backlight unit positioned on a lower portion of the lower display panel and including a light source, wherein a pair of field generating electrodes are formed in at least one display panel of the lower display panel and the upper display panel, wherein microcavities are formed in the lower reflective layer, the upper reflective layer, and the liquid crystal layer, and wherein a wavelength and luminance of light resonated and emitted in the microcavities are changed by an electric field generated by the field generating electrodes.Type: ApplicationFiled: March 15, 2013Publication date: February 20, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Jae Ho YOU, Hyun Jin CHO, Dae Ho YOON, Moon Gyu LEE, Byoung Ho CHEONG