Patents by Inventor Nam-Seok Roh
Nam-Seok 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: 11835814Abstract: A method of manufacturing a polarizing plate includes: preparing a polarizer including a dichroic material, the polarizer being configured to polarize incident light; forming a protective film on at least one surface of the polarizer; and forming at least one transmission region by selectively radiating a femtosecond laser onto the polarizer, a group transmittance of the at least one transmission region being 80% or more.Type: GrantFiled: September 10, 2019Date of Patent: December 5, 2023Assignee: Samsung Display Co., Ltd.Inventors: Ho Yun Byun, Hak Sun Kim, Nam Seok Roh, Seung Beom Park
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Patent number: 11630343Abstract: A display apparatus includes a light source emitting light; a light guide plate having a first surface and a second surface, and spreading light emitted from the light source therein to emit light through the first surface; and a local dimming unit configured to pass or scatter light emitted through the second surface of the light guide plate according to a position. The local dimming unit may include: an electro-optical layer configured to which optical properties change according to an electric field; and a plurality of electrodes positioned on the same plane to generate the electric field.Type: GrantFiled: November 8, 2018Date of Patent: April 18, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Hyun Cho, Nam Seok Roh, Sang Hyun Sohn, Jong Hee Han
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Patent number: 11367403Abstract: A display apparatus includes a plurality of light sources configured to emit light; a light guide plate having a first surface and a second surface, configured to spread light emitted from the plurality of light sources therein to emit light through the first surface; and a local dimming unit configured to reflect or scatter light emitted through the second surface of the light guide plate according to a location. The local dimming unit may include an electro-optical layer configured to change optical properties according to an electric field; a plurality of electrodes located on the same plane, configured to generate the electric field; and a controller configured to change a voltage applied to the plurality of electrodes according to an image.Type: GrantFiled: November 8, 2018Date of Patent: June 21, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Hyun Cho, Nam Seok Roh, Sang Hyun Sohn, Jong Hee Han
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Patent number: 11243342Abstract: Disclosed herein is a display apparatus. The display apparatus includes a backlight unit configured to emit light, a display panel positioned in front of the backlight unit; and an optical film positioned in front of the display panel, and the optical film includes a base layer, a first refractive layer positioned in front of the base layer, a second refractive layer positioned in front of the first refractive layer and having a lower refractive index than the first refractive layer, a third refractive layer positioned at the rear of the base layer, and a fourth refractive layer positioned at the rear of the third refractive layer and having a lower refractive index than the third refractive layer.Type: GrantFiled: October 2, 2019Date of Patent: February 8, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seung Jun Jeong, Sei Young Kang, Min Woo Kang, Nam Seok Roh, Kwan Sik Min, Jun Sung Choi
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Publication number: 20210373386Abstract: A display apparatus includes a light source emitting light; a light guide plate having a first surface and a second surface, and spreading light emitted from the light source therein to emit light through the first surface; and a local dimming unit configured to pass or scatter light emitted through the second surface of the light guide plate according to a position. The local dimming unit may include: an electro-optical layer configured to which optical properties change according to an electric field; and a plurality of electrodes positioned on the same plane to generate the electric field.Type: ApplicationFiled: November 8, 2018Publication date: December 2, 2021Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Hyun CHO, Nam Seok ROH, Sang Hyun SOHN, Jong Hee HAN
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Publication number: 20210366410Abstract: The display apparatus may comprise: a plurality of light sources for emitting light; a light guide plate, having a first surface and a second surface, for internally diffusing the light emitted from the plurality of light sources and emitting through the first surface; and a local dimming unit for reflecting or scattering, on the basis of location, the light emitted from the second surface of the light guide plate. Moreover, the local dimming unit may comprise: an electro-optic layer, the optical properties of which vary in accordance with an electric field; a plurality of electrodes located on the same plane and generating the electric field; and a control unit for varying the voltage applied to the plurality of electrodes in accordance with an image.Type: ApplicationFiled: November 8, 2018Publication date: November 25, 2021Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Hyun CHO, Nam Seok ROH, Sang Hyun SOHN, Jong Hee HAN
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Patent number: 11042063Abstract: A display device includes a backlight unit configured to emit light, a display panel disposed in front of the backlight unit, and an optical sheet disposed between the backlight unit and the display panel. The optical sheet may include a first prism sheet including a plurality of first prisms arranged in a first direction, a second prism sheet including a plurality of second prisms arranged in a second direction intersecting the first direction, and disposed in front of the first prism sheet; and a third prism sheet including a plurality of third prisms arranged in the first direction, and disposed in front of the second prism sheet.Type: GrantFiled: December 19, 2019Date of Patent: June 22, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sei Young Kang, Seung Jun Jeong, Min Woo Kang, Nam Seok Roh, Kwan Sik Min, Young Chol Lee, Jae Jeong Lee
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Patent number: 10890800Abstract: A display apparatus includes a light emitting module to emit light; a first prism sheet provided on the light emitting module; a reflective polarizing sheet provided on the first prism sheet to transmit first polarized light of the light exiting the first prism sheet and reflect second polarized light of the light exiting the first prism sheet; a second prism sheet provided on the reflective polarizing sheet; and a liquid crystal panel provided on the second prism sheet, the liquid crystal panel including a liquid crystal cell, a first polarizing sheet provided on a first side the liquid crystal cell, and a second polarizing sheet provided between the second prism sheet and a second side of the liquid crystal cell, wherein the second prism sheet is configured to control a transmission angle at which the light exiting the reflective polarizing sheet is transmitted by the liquid crystal cell.Type: GrantFiled: October 3, 2019Date of Patent: January 12, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young Chol Lee, Wook Jae Jeon, Nam Seok Roh, Kwan Sik Min
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Patent number: 10877305Abstract: Provided is a display apparatus including a light source configured to emit light; a light guide plate configured to diffuse and emit light emitted from the light source; and a local dimming portion configured to pass or scatter light emitted from the light guide plate. The local dimming portion may include an electro-optical material and a plurality of grains having refractive index that changes based on an electric field.Type: GrantFiled: August 7, 2019Date of Patent: December 29, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Hyun Cho, Nam Seok Roh, Won Geun Ryu, Sang Hyun Sohn, Hyo Gun Lee
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Publication number: 20200201119Abstract: A display device includes a backlight unit configured to emit light, a display panel disposed in front of the backlight unit, and an optical sheet disposed between the backlight unit and the display panel. The optical sheet may include a first prism sheet including a plurality of first prisms arranged in a first direction, a second prism sheet including a plurality of second prisms arranged in a second direction intersecting the first direction, and disposed in front of the first prism sheet; and a third prism sheet including a plurality of third prisms arranged in the first direction, and disposed in front of the second prism sheet.Type: ApplicationFiled: December 19, 2019Publication date: June 25, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sei Young KANG, Seung Jun JEONG, Min Woo KANG, Nam Seok ROH, Kwan Sik MIN, Young Chol LEE, Jae Jeong LEE
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Publication number: 20200117048Abstract: Disclosed herein is a display apparatus. The display apparatus includes a backlight unit configured to emit light, a display panel positioned in front of the backlight unit; and an optical film positioned in front of the display panel, and the optical film includes a base layer, a first refractive layer positioned in front of the base layer, a second refractive layer positioned in front of the first refractive layer and having a lower refractive index than the first refractive layer, a third refractive layer positioned at the rear of the base layer, and a fourth refractive layer positioned at the rear of the third refractive layer and having a lower refractive index than the third refractive layer.Type: ApplicationFiled: October 2, 2019Publication date: April 16, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seung Jun JEONG, Sei Young Kang, Min Woo Kang, Nam Seok Roh, Kwan Sik Min, Jun Sung Choi
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Publication number: 20200110304Abstract: A display apparatus includes a light emitting module to emit light; a first prism sheet provided on the light emitting module; a reflective polarizing sheet provided on the first prism sheet to transmit first polarized light of the light exiting the first prism sheet and reflect second polarized light of the light exiting the first prism sheet; a second prism sheet provided on the reflective polarizing sheet; and a liquid crystal panel provided on the second prism sheet, the liquid crystal panel including a liquid crystal cell, a first polarizing sheet provided on a first side the liquid crystal cell, and a second polarizing sheet provided between the second prism sheet and a second side of the liquid crystal cell, wherein the second prism sheet is configured to control a transmission angle at which the light exiting the reflective polarizing sheet is transmitted by the liquid crystal cell.Type: ApplicationFiled: October 3, 2019Publication date: April 9, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young Chol LEE, Wook Jae JEON, Nam Seok ROH, Kwan Sik MIN
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Publication number: 20200064664Abstract: Provided is a display apparatus including a light source configured to emit light; a light guide plate configured to diffuse and emit light emitted from the light source; and a local dimming portion configured to pass or scatter light emitted from the light guide plate. The local dimming portion may include an electro-optical material and a plurality of grains having refractive index that changes based on an electric field.Type: ApplicationFiled: August 7, 2019Publication date: February 27, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Hyun CHO, Nam Seok ROH, Won Geun RYU, Sang Hyun SOHN, Hyo Gun LEE
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Publication number: 20200004083Abstract: A method of manufacturing a polarizing plate includes: preparing a polarizer including a dichroic material, the polarizer being configured to polarize incident light; forming a protective film on at least one surface of the polarizer; and forming at least one transmission region by selectively radiating a femtosecond laser onto the polarizer, a group transmittance of the at least one transmission region being 80% or more.Type: ApplicationFiled: September 10, 2019Publication date: January 2, 2020Inventors: Ho Yun BYUN, Hak Sun KIM, Nam Seok ROH, Seung Beom PARK
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Patent number: 10503037Abstract: The present disclosure relates to a display device, and the display device according to an exemplary embodiment includes: a substrate having a rounded edge; a light blocking member disposed around a display area of the substrate, wherein a corner of the light blocking member has a rounded edge; a plurality of pixels disposed on the substrate; and a pixel electrode disposed in each of the plurality of pixels, wherein the pixel electrode has a horizontal stem, a vertical stem, and a plurality of fine branches, wherein the plurality of pixels includes a first pixel at least partially overlapping the light blocking member and a second pixel adjacent to the first pixel and not overlapping the light blocking member, and wherein a shape of a fine branch disposed in the first pixel is different from a shape of a fine branch disposed in the second pixel.Type: GrantFiled: May 8, 2019Date of Patent: December 10, 2019Assignee: Samsung Display Co., Ltd.Inventors: Chang Il Tae, Nam Seok Roh, Joo Lark Son, Young Goo Song, Seung Jun Yu
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Patent number: 10437096Abstract: A method of manufacturing a polarizing plate includes: preparing a polarizer including a dichroic material, the polarizer being configured to polarize incident light; forming a protective film on at least one surface of the polarizer; and forming at least one transmission region by selectively radiating a femtosecond laser onto the polarizer, a group transmittance of the at least one transmission region being 80% or more.Type: GrantFiled: December 4, 2017Date of Patent: October 8, 2019Assignee: Samsung Display Co., Ltd.Inventors: Ho Yun Byun, Hak Sun Kim, Nam Seok Roh, Seung Beom Park
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Publication number: 20190265563Abstract: The present disclosure relates to a display device, and the display device according to an exemplary embodiment includes: a substrate having a rounded edge; a light blocking member disposed around a display area of the substrate, wherein a corner of the light blocking member has a rounded edge; a plurality of pixels disposed on the substrate; and a pixel electrode disposed in each of the plurality of pixels, wherein the pixel electrode has a horizontal stem, a vertical stem, and a plurality of fine branches, wherein the plurality of pixels includes a first pixel at least partially overlapping the light blocking member and a second pixel adjacent to the first pixel and not overlapping the light blocking member, and wherein a shape of a fine branch disposed in the first pixel is different from a shape of a fine branch disposed in the second pixel.Type: ApplicationFiled: May 8, 2019Publication date: August 29, 2019Inventors: Chang Il TAE, Nam Seok ROH, Joo Lark SON, Young Goo SONG, Seung Jun YU
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Patent number: 10338437Abstract: A display device includes: a substrate including a plurality of pixel areas; a thin film transistor on the substrate; a pixel electrode connected to the thin film transistor; an roof layer connected between pixel areas adjacent in a first direction and separated from the pixel electrode; a column protruded from the roof layer in a boundary portion of the pixel areas; a space between the pixel electrode and the roof layer, the roof layer partially overlapping an upper inner wall and a first side inner wall of the space and exposing a second side inner wall of the space; a liquid crystal in the space.Type: GrantFiled: November 17, 2012Date of Patent: July 2, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seon Uk Lee, Yeun Tae Kim, Seong Gyu Kwon, Nam Seok Roh
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Patent number: 10303025Abstract: The present disclosure relates to a display device, and the display device according to an exemplary embodiment includes: a substrate having a rounded edge; a light blocking member disposed around a display area of the substrate, wherein a corner of the light blocking member has a rounded edge; a plurality of pixels disposed on the substrate; and a pixel electrode disposed in each of the plurality of pixels, wherein the pixel electrode has a horizontal stem, a vertical stem, and a plurality of fine branches, wherein the plurality of pixels includes a first pixel at least partially overlapping the light blocking member and a second pixel adjacent to the first pixel and not overlapping the light blocking member, and wherein a shape of a fine branch disposed in the first pixel is different from a shape of a fine branch disposed in the second pixel.Type: GrantFiled: August 31, 2017Date of Patent: May 28, 2019Assignee: Samsung Display Co., Ltd.Inventors: Chang Il Tae, Nam Seok Roh, Joo Lark Son, Young Goo Song, Seung Jun Yu
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Patent number: 10197853Abstract: A liquid crystal display according to an exemplary embodiment of the present invention includes: a display panel, and a color conversion layer coupled to the display panel and having a color conversion layer, where the color conversion layer includes a block copolymer including a first copolymer and a second copolymer, and quantum rods dispersed within the block copolymer. The block copolymer includes a first block structure unit formed by the first copolymer; and a second block structure unit formed by the second copolymer, where the quantum rods is are disposed within either one of the first block structure unit and the second block structure unit.Type: GrantFiled: January 31, 2018Date of Patent: February 5, 2019Assignee: Samsung Display Co., Ltd.Inventors: Baek Hee Lee, Nam Seok Roh, Seung-Won Park, Hae Il Park