Patents by Inventor Hyeong Sik Choi
Hyeong Sik 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: 11953783Abstract: Display apparatus includes LEDs, bottom chassis to accommodate the LEDs; and reflective member disposed on the bottom chassis. The reflective member includes a reflective bottom portion, and a reflective inclined portion obliquely formed to face a rear surface of the display panel which includes first regions that respectively correspond to LEDs located adjacent to the reflective inclined portion, and second regions each provided between two neighboring first regions and has a reflective characteristic different from a reflective characteristic of a neighboring first region. Second regions and neighboring first regions are on the reflective inclined portion having a uniform incline angle with respect to a side edge of the reflective bottom portion, the first regions include a group of light adjusting members, and the group of light adjusting members of each of the first regions is disposed to correspond to one of the LEDs disposed adjacent to the reflective inclined portion.Type: GrantFiled: February 28, 2023Date of Patent: April 9, 2024Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin Cho, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Publication number: 20230205007Abstract: Display apparatus includes LEDs, bottom chassis to accommodate the LEDs; and reflective member disposed on the bottom chassis. The reflective member includes a reflective bottom portion, and a reflective inclined portion obliquely formed to face a rear surface of the display panel which includes first regions that respectively correspond to LEDs located adjacent to the reflective inclined portion, and second regions each provided between two neighboring first regions and has a reflective characteristic different from a reflective characteristic of a neighboring first region. Second regions and neighboring first regions are on the reflective inclined portion having a uniform incline angle with respect to a side edge of the reflective bottom portion, the first regions include a group of light adjusting members, and the group of light adjusting members of each of the first regions is disposed to correspond to one of the LEDs disposed adjacent to the reflective inclined portion.Type: ApplicationFiled: February 28, 2023Publication date: June 29, 2023Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Byoung Jin CHO, Young Man AHN, Dae Hee LEE, Nae Won JANG, Hyeong Sik CHOI
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Patent number: 11619846Abstract: Display apparatus includes LEDs, bottom chassis to accommodate the LEDs; and reflective member disposed on the bottom chassis. The reflective member includes a reflective bottom portion, and a reflective inclined portion obliquely formed to face a rear surface of the display panel which includes first regions that respectively correspond to LEDs located adjacent to the reflective inclined portion, and second regions each provided between two neighboring first regions and has a reflective characteristic different from a reflective characteristic of a neighboring first region. Second regions and neighboring first regions are on the reflective inclined portion having a uniform incline angle with respect to a side edge of the reflective bottom portion, the first regions include a group of light adjusting members, and the group of light adjusting members of each of the first regions is disposed to correspond to one of the LEDs disposed adjacent to the reflective inclined portion.Type: GrantFiled: January 5, 2022Date of Patent: April 4, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin Cho, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Patent number: 11514862Abstract: A device for increasing a slew rate of a driving amplifier includes a driving amplifier, a slew rate improvement circuit, and a controller. The driving amplifier is configured to amplify an input voltage and output an output voltage. The slew rate improvement circuit is configured to provide or receive a current to increase the slew rate of the driving amplifier. The controller is configured to control an operation of the slew rate improvement circuit based on a difference between a first code corresponding to the input voltage of the driving amplifier during a current horizontal line time and a second code corresponding to the input voltage during a next horizontal line time.Type: GrantFiled: July 21, 2021Date of Patent: November 29, 2022Assignee: MagnaChip Semiconductor, Ltd.Inventors: Dong Ho Kim, Chel Ho Chung, Hee Jung Kim, Hyeong Sik Choi
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Publication number: 20220128863Abstract: Display apparatus includes LEDs, bottom chassis to accommodate the LEDs; and reflective member disposed on the bottom chassis. The reflective member includes a reflective bottom portion, and a reflective inclined portion obliquely formed to face a rear surface of the display panel which includes first regions that respectively correspond to LEDs located adjacent to the reflective inclined portion, and second regions each provided between two neighboring first regions and has a reflective characteristic different from a reflective characteristic of a neighboring first region. Second regions and neighboring first regions are on the reflective inclined portion having a uniform incline angle with respect to a side edge of the reflective bottom portion, the first regions include a group of light adjusting members, and the group of light adjusting members of each of the first regions is disposed to correspond to one of the LEDs disposed adjacent to the reflective inclined portion.Type: ApplicationFiled: January 5, 2022Publication date: April 28, 2022Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin CHO, Young Man AHN, Dae Hee LEE, Nae Won JANG, Hyeong Sik CHOI
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Publication number: 20220122542Abstract: A device for increasing a slew rate of a driving amplifier includes a driving amplifier, a slew rate improvement circuit, and a controller. The driving amplifier is configured to amplify an input voltage and output an output voltage. The slew rate improvement circuit is configured to provide or receive a current to increase the slew rate of the driving amplifier. The controller is configured to control an operation of the slew rate improvement circuit based on a difference between a first code corresponding to the input voltage of the driving amplifier during a current horizontal line time and a second code corresponding to the input voltage during a next horizontal line time.Type: ApplicationFiled: July 21, 2021Publication date: April 21, 2022Applicant: MagnaChip Semiconductor, Ltd.Inventors: Dong Ho KIM, Chel Ho CHUNG, Hee Jung KIM, Hyeong Sik CHOI
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Patent number: 11249347Abstract: A display apparatus includes LEDs disposed behind a display panel; a bottom chassis to accommodate the LEDs; and a reflective member disposed on the bottom chassis. The reflective member includes a reflective inclined portion obliquely formed to face a rear surface of the display panel and including first regions that respectively correspond to LEDs located adjacent to the reflective inclined portion, and second regions each of which is provided between two neighboring first regions. The first regions include light adjusting members, and each of the second regions has a reflective characteristic different from a reflective characteristic of a neighboring first region. Each of the first regions includes a group of light adjusting members which is disposed to correspond to one of the LEDs disposed adjacent to the reflective inclined portion. The two neighboring first regions have more light adjusting members, respectively, than one of the second regions disposed therebetween.Type: GrantFiled: September 30, 2020Date of Patent: February 15, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin Cho, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Publication number: 20210011341Abstract: A display apparatus includes LEDs disposed behind a display panel; a bottom chassis to accommodate the LEDs; and a reflective member disposed on the bottom chassis. The reflective member includes a reflective inclined portion obliquely formed to face a rear surface of the display panel and including first regions that respectively correspond to LEDs located adjacent to the reflective inclined portion, and second regions each of which is provided between two neighboring first regions. The first regions include light adjusting members, and each of the second regions has a reflective characteristic different from a reflective characteristic of a neighboring first region. Each of the first regions includes a group of light adjusting members which is disposed to correspond to one of the LEDs disposed adjacent to the reflective inclined portion. The two neighboring first regions have more light adjusting members, respectively, than one of the second regions disposed therebetween.Type: ApplicationFiled: September 30, 2020Publication date: January 14, 2021Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin CHO, Young Man AHN, Dae Hee LEE, Nae Won JANG, Hyeong Sik CHOI
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Patent number: 10845646Abstract: A display apparatus includes a display panel, LEDs disposed behind the display panel and spaced from the display panel to emit light toward the display panel, a bottom chassis having a rear portion on which the LEDs are disposed, and a reflective member disposed inside the bottom chassis and configured to reflect light incident from the LEDs toward the display panel. The reflective member includes a reflective inclined portion obliquely formed to face a rear surface of side portions of the display panel, first regions that respectively correspond to LEDs located adjacent the reflective inclined portion, and second regions provided between two neighboring first regions respectively and having a reflective characteristic different from a reflective characteristic of at least one among the two neighboring first regions.Type: GrantFiled: September 10, 2019Date of Patent: November 24, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin Cho, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Publication number: 20200073177Abstract: A display apparatus includes a display panel, LEDs disposed behind the display panel and spaced from the display panel to emit light toward the display panel, a bottom chassis having a rear portion on which the LEDs are disposed, and a reflective member disposed inside the bottom chassis and configured to reflect light incident from the LEDs toward the display panel. The reflective member includes a reflective inclined portion obliquely formed to face a rear surface of side portions of the display panel, first regions that respectively correspond to LEDs located adjacent the reflective inclined portion, and second regions provided between two neighboring first regions respectively and having a reflective characteristic different from a reflective characteristic of at least one among the two neighboring first regions.Type: ApplicationFiled: September 10, 2019Publication date: March 5, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin CHO, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Patent number: 10437103Abstract: A display apparatus includes a display panel, LEDs disposed behind the display panel and spaced from the display panel to emit light toward the display panel, a bottom chassis configured to accommodate the LEDs, and a reflective member disposed inside the bottom chassis and configured to reflect a light portion incident thereon toward the display panel. The reflective member includes a reflective bottom portion corresponding to a front surface of the bottom chassis, and reflective inclined portions obliquely formed to face a rear surface of the display panel and having a plurality of holes thereon. The reflective inclined portions include a first region that corresponds to an LED and a second region that is between two neighboring LEDs, and the first region has a higher hole density than the second region, and the first region is closer to the LED than the second region.Type: GrantFiled: November 13, 2018Date of Patent: October 8, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin Cho, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Publication number: 20190079351Abstract: A display apparatus includes a display panel, LEDs disposed behind the display panel and spaced from the display panel to emit light toward the display panel, a bottom chassis configured to accommodate the LEDs, and a reflective member disposed inside the bottom chassis and configured to reflect a light portion incident thereon toward the display panel. The reflective member includes a reflective bottom portion corresponding to a front surface of the bottom chassis, and reflective inclined portions obliquely formed to face a rear surface of the display panel and having a plurality of holes thereon. The reflective inclined portions include a first region that corresponds to an LED and a second region that is between two neighboring LEDs, and the first region has a higher hole density than the second region, and the first region is closer to the LED than the second region.Type: ApplicationFiled: November 13, 2018Publication date: March 14, 2019Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin CHO, Young Man AHN, Dae Hee LEE, Nae Won JANG, Hyeong Sik CHOI
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Patent number: 10175532Abstract: A display module includes a display panel; a backlight unit which is disposed behind the display panel; a bottom chassis to accommodate the backlight unit; and a reflective sheet which is disposed inside the bottom chassis and configured to reflect a light portion incident thereon toward the display panel. The backlight unit includes LEDs disposed apart from one another in 2D array, and the reflective sheet includes a sheet bottom portion corresponding to a front surface of the bottom chassis, a sheet inclined portion which is obliquely formed to face a rear surface of the display panel, and light adjustment portions which are provided on the sheet inclined portion and configured to adjust the light portion reflected by the sheet inclined portion. Each of the light adjustment portions corresponds to one of the LEDs disposed adjacent to the sheet inclined portion.Type: GrantFiled: September 1, 2017Date of Patent: January 8, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin Cho, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Patent number: 10031360Abstract: A curved display apparatus and a multi display system having the same are provided. The curved display apparatus includes a display panel, and a fixation member which fixes the display panel so that the display panel is curved with multiple curvatures.Type: GrantFiled: December 7, 2016Date of Patent: July 24, 2018Assignees: SAMSUNG ELECTRONICS CO., LTD., Samsung Display Co., Ltd.Inventors: Jun-seok An, Dong-wook Kim, Sung-hwan Kim, Jee-su Park, Chan-hong Park, Byung-kook Sim, Jong-cheol Lee, Cheol-se Lee, Hyeong-sik Choi, Byung-wook Ahn, Cheong-hun Lee
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Patent number: 10001670Abstract: A supporting member usable with a backlight unit of an image display apparatus includes a supporting portion that is formed of a transparent material, disposed below a diffuser plate to support the diffuser plate, and includes a first end being in contact with the diffuser plate and two flat side surfaces disposed in parallel to one another and connected to one another at the first end; a base that is formed at a second end of the supporting portion and fixes the supporting portion to an under chassis of the backlight unit; and a reinforcing portion that is disposed on a top surface of the base.Type: GrantFiled: August 10, 2015Date of Patent: June 19, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung-jin Cho, Young-chol Lee, Hyung-chul Kim, Heong-seog Lee, Hyeong-sik Choi
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Patent number: 9977298Abstract: A display panel includes an upper plate including a first substrate, a first electrode layer formed on an inner surface of the first substrate, and an absorptive polarizing film formed on an outer surface of the first substrate and having a first polarization axis, a lower plate including a second substrate, a second electrode layer formed on an inner surface of the second substrate, and a reflective polarizing film formed on an outer surface of the second substrate and having a second polarization axis perpendicular or parallel to the first polarization axis, an LC layer filled between the upper plate and the lower plate, and an LC driving power supply connected between the first electrode layer and the second electrode layer and configured to selectively provide an LC driving voltage to the LC layer changing a polarization direction of incident light in the LC layer.Type: GrantFiled: July 9, 2014Date of Patent: May 22, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Won-yong Lee, Hyeong-sik Choi, Ju-seong Hwang
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Publication number: 20180011376Abstract: A display module includes a display panel; a backlight unit which is disposed behind the display panel; a bottom chassis to accommodate the backlight unit; and a reflective sheet which is disposed inside the bottom chassis and configured to reflect a light portion incident thereon toward the display panel. The backlight unit includes LEDs disposed apart from one another in 2D array, and the reflective sheet includes a sheet bottom portion corresponding to a front surface of the bottom chassis, a sheet inclined portion which is obliquely formed to face a rear surface of the display panel, and light adjustment portions which are provided on the sheet inclined portion and configured to adjust the light portion reflected by the sheet inclined portion. Each of the light adjustment portions corresponds to one of the LEDs disposed adjacent to the sheet inclined portion.Type: ApplicationFiled: September 1, 2017Publication date: January 11, 2018Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin CHO, Young Man AHN, Dae Hee LEE, Nae Won JANG, Hyeong Sik CHOI
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Patent number: 9785008Abstract: A display module includes a display panel; a backlight unit which is disposed behind the display panel; a bottom chassis to accommodate the backlight unit; and a reflective sheet which is disposed inside the bottom chassis and configured to reflect a light portion incident thereon toward the display panel. The backlight unit includes LEDs disposed apart from one another in 2D array, and the reflective sheet includes a sheet bottom portion corresponding to a front surface of the bottom chassis, a sheet inclined portion which is obliquely formed to face a rear surface of the display panel, and light adjustment portions which are provided on the sheet inclined portion and configured to adjust the light portion reflected by the sheet inclined portion. Each of the light adjustment portions corresponds to one of the LEDs disposed adjacent to the sheet inclined portion.Type: GrantFiled: July 27, 2015Date of Patent: October 10, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byoung Jin Cho, Young Man Ahn, Dae Hee Lee, Nae Won Jang, Hyeong Sik Choi
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Patent number: 9769464Abstract: An image display device is provided. The image display device includes a light source and a polarizer including a first polarizing region configured to linearly polarize light which is output from the light source and a second polarizing region configured to circularly polarize light which is output from the light source.Type: GrantFiled: October 6, 2014Date of Patent: September 19, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Keun Bae Jeon, Masaru Minami, Hyeong Sik Choi
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Publication number: 20170082889Abstract: A curved display apparatus and a multi display system having the same are provided. The curved display apparatus includes a display panel, and a fixation member which fixes the display panel so that the display panel is curved with multiple curvatures.Type: ApplicationFiled: December 7, 2016Publication date: March 23, 2017Applicants: SAMSUNG ELECTRONICS CO., LTD., Samsung Display Co., Ltd.Inventors: Jun-seok AN, Dong-wook KIM, Sung-hwan KIM, Jee-su PARK, Chan-hong PARK, Byung-kook SIM, Jong-cheol LEE, Cheol-se LEE, Hyeong-sik CHOI, Byung-wook AHN, Cheong-hun LEE