Patents by Inventor Hee-Hwan Lee
Hee-Hwan Lee 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: 11963439Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure, it is possible to produce an organic electroluminescent device having improved driving voltage, power efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.Type: GrantFiled: August 24, 2022Date of Patent: April 16, 2024Assignee: Rohm and Haas Electronic Materials Korea Ltd.Inventors: Eun-Joung Choi, Young-Kwang Kim, Su-Hyun Lee, So-Young Jung, YeJin Jeon, Hong-Se Oh, Dong-Hyung Lee, Jin-Man Kim, Hyun-Woo Kang, Mi-Ja Lee, Hee-Ryong Kang, Hyo-Nim Shin, Jeong-Hwan Jeon, Sang-Hee Cho
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Patent number: 11003027Abstract: A liquid crystal display includes: a first pixel and a second pixel for displaying different colors, the first pixel and the second pixel each including a first sub-pixel electrode receiving a first voltage; a second sub-pixel electrode receiving a second voltage; an insulating layer disposed between the first sub-pixel electrode and the second sub-pixel electrode; and a common electrode receiving a common voltage. A first portion of the first sub-pixel electrode and a second portion of the second sub-pixel electrode overlap each other, a difference between the first voltage and the common voltage is larger than a difference between the second voltage and the common voltage, and a ratio of the second voltage to the first voltage for the first pixel is different from a ratio of the second voltage to the first voltage for the second pixel.Type: GrantFiled: March 5, 2020Date of Patent: May 11, 2021Inventors: Min-Joo Han, Hyo Sik Kim, Kyu Su Ahn, Dan Bi Yang, Hee Hwan Lee, Hoon Kim, Ki Chui Shin
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Publication number: 20200201125Abstract: A liquid crystal display includes: a first pixel and a second pixel for displaying different colors, the first pixel and the second pixel each including a first sub-pixel electrode receiving a first voltage; a second sub-pixel electrode receiving a second voltage; an insulating layer disposed between the first sub-pixel electrode and the second sub-pixel electrode; and a common electrode receiving a common voltage. A first portion of the first sub-pixel electrode and a second portion of the second sub-pixel electrode overlap each other, a difference between the first voltage and the common voltage is larger than a difference between the second voltage and the common voltage, and a ratio of the second voltage to the first voltage for the first pixel is different from a ratio of the second voltage to the first voltage for the second pixel.Type: ApplicationFiled: March 5, 2020Publication date: June 25, 2020Inventors: Min-Joo HAN, Hyo Sik KIM, Kyu Su AHN, Dan Bi YANG, Hee Hwan LEE, Hoon KIM, Ki Chul SHIN
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Patent number: 10663802Abstract: A liquid crystal display includes: a first pixel and a second pixel for displaying different colors, the first pixel and the second pixel each including a first sub-pixel electrode receiving a first voltage; a second sub-pixel electrode receiving a second voltage; an insulating layer disposed between the first sub-pixel electrode and the second sub-pixel electrode; and a common electrode receiving a common voltage. A first portion of the first sub-pixel electrode and a second portion of the second sub-pixel electrode overlap each other, a difference between the first voltage and the common voltage is larger than a difference between the second voltage and the common voltage, and a ratio of the second voltage to the first voltage for the first pixel is different from a ratio of the second voltage to the first voltage for the second pixel.Type: GrantFiled: February 16, 2016Date of Patent: May 26, 2020Assignee: Samsung Display Co., Ltd.Inventors: Min-Joo Han, Hyo Sik Kim, Kyu Su Ahn, Dan Bi Yang, Hee Hwan Lee, Hoon Kim, Ki Chul Shin
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Patent number: 10048409Abstract: An optical film includes a base film including a base and first and second lens pattern portions, where the first lens pattern portion includes a first surface, a first side surface, which extends from one side of the first surface to a surface of the base and a second side surface, which extends from the other side of the first surface and the surface of the base, the second lens pattern portion includes a second surface, a third side surface, which extends from one side of the second surface to the surface of the base, and a fourth side surface, which extends from the other side of the second surface and the surface of the base, and an angle between an imaginary line and the surface of the base is less than about 50 degrees.Type: GrantFiled: March 30, 2016Date of Patent: August 14, 2018Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hee Hwan Lee, Je Won Yoo, Seung In Baek, Ju Youn Son
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Patent number: 9921436Abstract: A thin film transistor array panel includes a first subpixel electrode and a second subpixel electrode electrically connected with a drain electrode through a first contact hole and a second contact hole, respectively. The first subpixel electrode and the second subpixel electrode include a plurality of vertical stems, a plurality of horizontal stems, and a plurality of branch electrodes. The first subpixel electrode is formed above a gate line and the second subpixel electrode is formed below a gate line. The thin film transistor array panel further includes a first protrusion formed in the plurality of vertical stems of the first subpixel electrode and the plurality of vertical stems of the second subpixel electrode.Type: GrantFiled: September 14, 2016Date of Patent: March 20, 2018Assignee: Samsung Display Co., Ltd.Inventors: Hee Hwan Lee, Kyu Su Ahn, Kyung Ho Kim, Kee Bum Park
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Patent number: 9874789Abstract: A thin film transistor according to the present inventive concept includes: a first and a second pixel electrodes that are electrically connected to the drain electrode through the contact hole and disposed to be adjacent to each other in a column direction, wherein the first pixel electrode includes a first sub-pixel electrode and a second sub-pixel electrode that include a vertical stem part, a horizontal stem part, and a plurality of minute branches, the second pixel electrode includes a third sub-pixel electrode and a fourth sub-pixel electrode that include a vertical stem part, a horizontal stem part, and a plurality of minute branches, and the plurality of minute branches of the second sub-pixel electrode and the plurality of minute branches of the third sub-pixel electrode that are adjacent to each other to each other in the column direction form an angle of 45° or more to 135° or less.Type: GrantFiled: March 19, 2015Date of Patent: January 23, 2018Assignee: Samsung Display Co., Ltd.Inventors: Kyu Su Ahn, Hee Hwan Lee, Kyung Ho Kim, Kee Bum Park
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Patent number: 9746736Abstract: Disclosed is a liquid crystal display, including: a first substrate, the first substrate including a voltage division reference voltage line and a pixel electrode, the pixel electrode including a first stem portion, a plurality of first fine branch portions obliquely extending from the first stem portion, a second stem portion, a plurality of second fine branch portions obliquely extending from the second stem portion, and a connection portion connecting the first fine branch portions and some of the second fine branch portions; in which the voltage division reference voltage line includes a bent portion bent at a portion overlapping the connection portion.Type: GrantFiled: March 4, 2016Date of Patent: August 29, 2017Assignee: Samsung Display Co., Ltd.Inventors: Kyu Su Ahn, Hee Hwan Lee
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Publication number: 20170052287Abstract: An optical film includes a base film including a base and first and second lens pattern portions, where the first lens pattern portion includes a first surface, a first side surface, which extends from one side of the first surface to a surface of the base and a second side surface, which extends from the other side of the first surface and the surface of the base, the second lens pattern portion includes a second surface, a third side surface, which extends from one side of the second surface to the surface of the base, and a fourth side surface, which extends from the other side of the second surface and the surface of the base, and an angle between an imaginary line and the surface of the base is less than about 50 degrees.Type: ApplicationFiled: March 30, 2016Publication date: February 23, 2017Inventors: Hee Hwan LEE, Je Won YOO, Seung In BAEK, Ju Youn SON
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Publication number: 20170003557Abstract: A thin film transistor array panel includes a first subpixel electrode and a second subpixel electrode electrically connected with a drain electrode through a first contact hole and a second contact hole, respectively. The first subpixel electrode and the second subpixel electrode include a plurality of vertical stems, a plurality of horizontal stems, and a plurality of branch electrodes. The first subpixel electrode is formed above a gate line and the second subpixel electrode is formed below a gate line. The thin film transistor array panel further includes a first protrusion formed in the plurality of vertical stems of the first subpixel electrode and the plurality of vertical stems of the second subpixel electrode.Type: ApplicationFiled: September 14, 2016Publication date: January 5, 2017Inventors: Hee Hwan LEE, Kyu Su AHN, Kyung Ho KIM, Kee Bum PARK
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Patent number: 9519194Abstract: A liquid crystal display, including: a first substrate; a gate line and a data line disposed on the first substrate; a pixel electrode disposed on the first substrate and including a stem portion and a plurality of branch electrodes that extends obliquely from the stem portion; a second substrate facing the first substrate; and a common electrode disposed on the second substrate, and the pixel electrode further includes a plurality of oblique portions disposed between the plurality of branch electrodes and the stem portion, and the plurality of oblique portions extends in a direction different from a direction in which the plurality of branch electrodes extends.Type: GrantFiled: July 1, 2014Date of Patent: December 13, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hee Hwan Lee, Hae Ryeong Park, Dong Il Yoo, Mun-Soo Park, Kyu Su Ahn, Yong Woo Lee
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Publication number: 20160320683Abstract: Disclosed is a liquid crystal display, including: a first substrate, the first substrate including a voltage division reference voltage line and a pixel electrode, the pixel electrode including a first stem portion, a plurality of first fine branch portions obliquely extending from the first stem portion, a second stem portion, a plurality of second fine branch portions obliquely extending from the second stem portion, and a connection portion connecting the first fine branch portions and some of the second fine branch portions; in which the voltage division reference voltage line includes a bent portion bent at a portion overlapping the connection portion.Type: ApplicationFiled: March 4, 2016Publication date: November 3, 2016Inventors: Kyu Su AHN, Hee Hwan LEE
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Patent number: 9448455Abstract: A thin film transistor array panel includes a first subpixel electrode and a second subpixel electrode electrically connected with a drain electrode through a first contact hole and a second contact hole, respectively. The first subpixel electrode and the second subpixel electrode include a plurality of vertical stems, a plurality of horizontal stems, and a plurality of branch electrodes. The first subpixel electrode is formed above a gate line and the second subpixel electrode is formed below a gate line. The thin film transistor array panel further includes a first protrusion formed in the plurality of vertical stems of the first subpixel electrode and the plurality of vertical stems of the second subpixel electrode.Type: GrantFiled: March 18, 2015Date of Patent: September 20, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hee Hwan Lee, Kyu Su Ahn, Kyung Ho Kim, Kee Bum Park
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Patent number: 9423654Abstract: A liquid crystal display may include a first substrate, a second substrate facing the first substrate, a liquid crystal layer comprising liquid crystal molecules that are interposed between the first substrate and the second substrate, a first electrode disposed on the first substrate, an insulating layer disposed on the first electrode, a second electrode disposed on the insulating layer, a third electrode disposed on the second substrate, and an alignment layer disposed on any one of the second electrode and the third electrode. The second electrode comprises a fine slit structure, and at least one of the liquid crystal layer and the alignment layer comprises a sub-alignment substance.Type: GrantFiled: January 2, 2015Date of Patent: August 23, 2016Assignee: Samsung Display Co., Ltd.Inventors: Gak-Seok Lee, Ki Chul Shin, Youn Hak Jeong, Hee Hwan Lee, Joo Seok Yeom
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Publication number: 20160238905Abstract: A liquid crystal display includes: a first pixel and a second pixel for displaying different colors, the first pixel and the second pixel each including a first sub-pixel electrode receiving a first voltage; a second sub-pixel electrode receiving a second voltage; an insulating layer disposed between the first sub-pixel electrode and the second sub-pixel electrode; and a common electrode receiving a common voltage. A first portion of the first sub-pixel electrode and a second portion of the second sub-pixel electrode overlap each other, a difference between the first voltage and the common voltage is larger than a difference between the second voltage and the common voltage, and a ratio of the second voltage to the first voltage for the first pixel is different from a ratio of the second voltage to the first voltage for the second pixel.Type: ApplicationFiled: February 16, 2016Publication date: August 18, 2016Inventors: Min-Joo HAN, Hyo Sik KIM, Kyu Su AHN, Dan Bi YANG, Hee Hwan LEE, Hoon KIM, Ki Chul SHIN
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Publication number: 20160161806Abstract: A thin film transistor according to the present inventive concept includes: a first and a second pixel electrodes that are electrically connected to the drain electrode through the contact hole and disposed to be adjacent to each other in a column direction, wherein the first pixel electrode includes a first sub-pixel electrode and a second sub-pixel electrode that include a vertical stem part, a horizontal stem part, and a plurality of minute branches, the second pixel electrode includes a third sub-pixel electrode and a fourth sub-pixel electrode that include a vertical stem part, a horizontal stem part, and a plurality of minute branches, and the plurality of minute branches of the second sub-pixel electrode and the plurality of minute branches of the third sub-pixel electrode that are adjacent to each other to each other in the column direction form an angle of 45° or more to 135° or less.Type: ApplicationFiled: March 19, 2015Publication date: June 9, 2016Inventors: Kyu Su AHN, Hee Hwan LEE, Kyung Ho KIM, Kee Bum PARK
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Patent number: 9341895Abstract: A liquid crystal display includes a first substrate and a second substrate facing each other, a plurality of first electrodes on the first substrate, a first vertical alignment layer on the first electrodes, a second electrode on the second substrate, a second vertical alignment layer on the second electrode, and a liquid crystal layer between the first substrate and the second substrate, wherein the liquid crystal layer includes liquid crystal molecules having negative dielectric anisotropy, a chiral dopant, and an alignment aiding agent.Type: GrantFiled: June 22, 2012Date of Patent: May 17, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Dong Gi Seong, Hee Hwan Lee, Min-Jae Kim, Min-Hee Kim, Keun Chan Oh
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Publication number: 20160109773Abstract: A thin film transistor array panel includes a first subpixel electrode and a second subpixel electrode electrically connected with a drain electrode through a first contact hole and a second contact hole, respectively. The first subpixel electrode and the second subpixel electrode include a plurality of vertical stems, a plurality of horizontal stems, and a plurality of branch electrodes. The first subpixel electrode is formed above a gate line and the second subpixel electrode is formed below a gate line. The thin film transistor array panel further includes a first protrusion formed in the plurality of vertical stems of the first subpixel electrode and the plurality of vertical stems of the second subpixel electrode.Type: ApplicationFiled: March 18, 2015Publication date: April 21, 2016Inventors: Hee Hwan LEE, Kyu Su AHN, Kyung Ho KIM, Kee Bum PARK
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Patent number: 9176344Abstract: A liquid crystal display includes a first substrate and a second substrate facing each other; a switching element disposed on the first substrate; a pixel electrode connected to the switching element and supplied with a data voltage; an opposing electrode disposed on the second substrate; and a liquid crystal layer disposed between the first substrate and the second substrate and including liquid crystal molecules. The pixel electrode includes a cutout and a liquid crystal direction controller that are alternately disposed. The cutout and the liquid crystal direction controller divide the pixel electrode into a plurality of sub-regions, and inclination directions of the liquid crystal molecules are different according to the plurality of sub-regions when the pixel electrode is supplied with the data voltage. The liquid crystal direction controller is concave downward or convex upward with respect to a surface of the first substrate.Type: GrantFiled: October 13, 2010Date of Patent: November 3, 2015Assignee: Samsung Display Co., Ltd.Inventors: Youn-Hak Jeong, Hee-Hwan Lee, Keun-Chan Oh, Jae-Jin Lyu, Yoon-Sung Um
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Patent number: 9116566Abstract: A liquid crystal display having a touch screen panel (TSP) function includes a sensor unit formed on the first substrate; a first sensor wire disposed on the first substrate and a second sensor wire extending perpendicular to the first sensor wire, wherein the sensor unit includes a first sensor electrode connected to the first sensor wire and a second sensor electrode connected to the second sensor wire, wherein said first sensor electrode and said second sensor electrode connect when touched, and said first and second sensor wires confirm a touch position by transmitting a sensing current through the connection between the first sensor electrode and the second sensor electrode, a trench is formed near the sensor unit and a silicon protrusion pattern to increase the sensitivity of the touch screen panel.Type: GrantFiled: November 2, 2010Date of Patent: August 25, 2015Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sang-Youn Han, Yeon-Sik Ham, Sung-Hoon Yang, Keun-Chan Oh, Hee-Hwan Lee