Patents by Inventor Sung-Soo Chang
Sung-Soo Chang 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: 11983339Abstract: The present disclosure provides a touch display device for minimizing viewing-angle-dependent variation in color coordinates. The touch display device includes a light-emitting element disposed in each of a plurality of subpixels including emission areas having different sizes, a plurality of touch electrodes disposed on the light-emitting element, and at least one opening formed in each of the plurality of touch electrodes. The width of the opening is formed differently in each of the plurality of subpixels including the emission areas having different sizes, thereby minimizing viewing-angle-dependent variation in color coordinates.Type: GrantFiled: December 11, 2020Date of Patent: May 14, 2024Assignee: LG DISPLAY CO., LTD.Inventors: Neung-Hee Lee, Sung-Wook Chang, Hyung-Soo Kim
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Patent number: 8704991Abstract: Provided is an LCD capable of compensating for a resistance variation in a link unit. The resistance variations in the gate lines, data lines and common lines are reduced to minimize the signal distortion in the LCD. Accordingly, it is possible to enhance the image quality characteristics of the LCD. The resistance variation can be reduced by adjusting the number or the size of contact holes in the link unit.Type: GrantFiled: May 30, 2006Date of Patent: April 22, 2014Assignee: LG Display Co., Ltd.Inventors: Sung Soo Chang, Hyung Beom Shin, Sang Wook Park
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Patent number: 8054420Abstract: A liquid crystal display device includes an array substrate having reflective and transmissive regions in a pixel region, wherein the array substrate includes a reflective electrode corresponding to the reflective region and a pixel electrode on a first substrate. A color filter substrate defines the reflective region and the transmissive region in the pixel region. The color filter substrate includes a color filter with first and second portions that correspond to the respective transmissive and reflective regions on a second substrate. The thickness of the second portion is less than a thickness of the first portion. The combined thickness of the scatter and the thickness of the second portion is greater than the thickness of the first portion; and a liquid crystal layer between the array and color filter substrates.Type: GrantFiled: January 7, 2010Date of Patent: November 8, 2011Assignee: LG Display Co., Ltd.Inventors: Sung-Soo Chang, Woo-Hyun Kim, Jin-Ho Kim
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Patent number: 7884910Abstract: A liquid crystal display device includes a gate line formed on a substrate; first and second data lines crossing the gate line to form adjacent pixel regions in a direction of the gate line; pixel electrodes and common electrodes substantially parallel to each other and generating an in-plane electric field; a first pixel electrode line parallel to the first data line and spaced apart from the first data line by a first isolation distance; a second pixel electrode line spaced apart from the second data line by a second isolation distance; and a first common line parallel to the first data line and spaced apart from the first data line by a third isolation distance; a second common line spaced from the second data line by a fourth isolation distance, wherein the first isolation distance is shorter than the third isolation distance, and a parasitic capacitance between the first pixel electrode line and the first data line is greater than a parasitic capacitance between the second pixel electrode line and the seType: GrantFiled: June 27, 2005Date of Patent: February 8, 2011Assignee: LG Display Co., Ltd.Inventors: Do Sung Kim, Byung Koo Kang, Do Young Lee, Sung Soo Chang
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Patent number: 7868956Abstract: A liquid crystal display (LCD) device includes a first substrate, gate lines formed on the first substrate, data lines perpendicularly crossing the gate lines to define red, green, and blue (R/G/B) sub-pixels, thin film transistors (TFTs) disposed at each intersection where the gate lines cross the data lines, common lines disposed in parallel with the gate lines, the common lines including a common line capacitance (Cdc) control portion, pixel electrodes insulated from the common lines and connected to the TFTs, a second substrate opposite to the first substrate and bonded to the first substrate, and a liquid crystal layer disposed between the first and second substrates.Type: GrantFiled: October 21, 2009Date of Patent: January 11, 2011Assignee: LG Display Co., Ltd.Inventors: Woo Hyun Kim, Eui Tae Kim, Sung Soo Chang
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Patent number: 7714970Abstract: A liquid crystal display (“LCD”) device includes a white sub-pixel that has a smaller size than other sub-pixels thereby increasing the brightness and the color purities of the other colors, which improves image quality. An LCD device has the common and pixel electrodes on the same substrate and may be formed of a transparent conductive material to increase the brightness further.Type: GrantFiled: May 19, 2006Date of Patent: May 11, 2010Assignee: LG. Display Co., Ltd.Inventors: Woo-Hyun Kim, Sung-Soo Chang
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Publication number: 20100110349Abstract: A liquid crystal display device includes an array substrate having reflective and transmissive regions in a pixel region, wherein the array substrate includes a reflective electrode corresponding to the reflective region and a pixel electrode on a first substrate. A color filter substrate defines the reflective region and the transmissive region in the pixel region. The color filter substrate includes a color filter with first and second portions that correspond to the respective transmissive and reflective regions on a second substrate. The thickness of the second portion is less than a thickness of the first portion. The combined thickness of the scatter and the thickness of the second portion is greater than the thickness of the first portion; and a liquid crystal layer between the array and color filter substrates.Type: ApplicationFiled: January 7, 2010Publication date: May 6, 2010Applicant: LG Display Co., Ltd.Inventors: Sung-Soo Chang, Woo-Hyun Kim, Jin-Ho Kim
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Patent number: 7667797Abstract: A liquid crystal display device includes an array substrate having reflective and transmissive regions in a pixel region, wherein the array substrate includes a reflective electrode corresponding to the reflective region and a pixel electrode on a first substrate. A color filter substrate defines the reflective region and the transmissive region in the pixel region. The color filter substrate includes a color filter with first and second portions that correspond to the respective transmissive and reflective regions on a second substrate. The thickness of the second portion is less than a thickness of the first portion. The combined thickness of the scatter and the thickness of the second portion is greater than the thickness of the first portion; and a liquid crystal layer between the array and color filter substrates.Type: GrantFiled: December 20, 2006Date of Patent: February 23, 2010Assignee: LG. Display Co., Ltd.Inventors: Sung-Soo Chang, Woo-Hyun Kim, Jin-Ho Kim
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Publication number: 20100039601Abstract: A liquid crystal display (LCD) device includes a first substrate, gate lines formed on the first substrate, data lines perpendicularly crossing the gate lines to define red, green, and blue (R/G/B) sub-pixels, thin film transistors (TFTs) disposed at each intersection where the gate lines cross the data lines, common lines disposed in parallel with the gate lines, the common lines including a common line capacitance (Cdc) control portion, pixel electrodes insulated from the common lines and connected to the TFTs, a second substrate opposite to the first substrate and bonded to the first substrate, and a liquid crystal layer disposed between the first and second substrates.Type: ApplicationFiled: October 21, 2009Publication date: February 18, 2010Inventors: Woo Hyun KIM, Eui Tae KIM, Sung Soo CHANG
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Patent number: 7623190Abstract: A liquid crystal display (LCD) device includes a first substrate, gate lines formed on the first substrate, data lines perpendicularly crossing the gate lines to define red, green, and blue (R/G/B) sub-pixels, thin film transistors (TFTs) disposed at each intersection where the gate lines cross the data lines, common lines disposed in parallel with the gate lines, the common lines including a common line capacitance (Cdc) control portion, pixel electrodes insulated from the common lines and connected to the TFTs, a second substrate opposite to the first substrate and bonded to the first substrate, and a liquid crystal layer disposed between the first and second substrates.Type: GrantFiled: December 13, 2005Date of Patent: November 24, 2009Assignee: LG Display Co., Ltd.Inventors: Woo Hyun Kim, Eui Tae Kim, Sung Soo Chang
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Patent number: 7599032Abstract: A liquid crystal display (LCD) device includes a unit pixel defined by a gate line formed on a substrate and a data line crossing the gate line, a switching device formed in the unit pixel, a common electrode line formed parallel to the gate line, the common electrode line including a first transparent electrode layer and a first conductive layer, a common electrode having a conductive portion and a light transmitting portion formed within the unit pixel and connected to the common electrode line, the conductive portion formed along a periphery of the common electrode including a second transparent electrode layer and a second conductive layer, and the light transmitting portion including a third transparent electrode layer disposed in a middle portion of the common electrode includes a third transparent electrode layer, and a pixel electrode having a slit region arranged to face the common electrode.Type: GrantFiled: December 19, 2005Date of Patent: October 6, 2009Assignee: LG Display Co., Ltd.Inventors: Sung-Soo Chang, Woo-Hyun Kim, In-Seob Kim, Dong-Hoon Lee
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Publication number: 20070153175Abstract: A liquid crystal display device includes an array substrate having reflective and transmissive regions in a pixel region, wherein the array substrate includes a reflective electrode corresponding to the reflective region and a pixel electrode on a first substrate. A color filter substrate defines the reflective region and the transmissive region in the pixel region. The color filter substrate includes a color filter with first and second portions that correspond to the respective transmissive and reflective regions on a second substrate. The thickness of the second portion is less than a thickness of the first portion. The combined thickness of the scatter and the thickness of the second portion is greater than the thickness of the first portion; and a liquid crystal layer between the array and color filter substrates.Type: ApplicationFiled: December 20, 2006Publication date: July 5, 2007Inventors: Sung-Soo Chang, Woo-Hyun Kim, Jin-Ho Kim
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Publication number: 20070002217Abstract: A liquid crystal display device includes a first substrate on which unit pixels are arranged, a second substrate facing the first substrate, a liquid crystal layer formed between the first substrate and the second substrate, the liquid crystal layer having liquid crystals arranged in a first direction, a first polarization plate formed at an outer side of the first substrate, the first polarization plate having a polarization axis parallel to the first direction, and a second polarization plate formed at an outer side of the second substrate, the second polarization plate including a polarization film having a polarization axis at a right angle to the first direction and a uni-axial film having a polarization axis at a right angle to the first direction.Type: ApplicationFiled: December 23, 2005Publication date: January 4, 2007Applicant: LG.PHILIPS LCD CO., LTD.Inventors: Sung-Soo Chang, Woo-Hyun Kim, Ha-Young Ji
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Publication number: 20070002246Abstract: A liquid crystal display (LCD) device includes a unit pixel defined by a gate line formed on a substrate and a data line crossing the gate line, a switching device formed in the unit pixel, a common electrode line formed parallel to the gate line, the common electrode line including a first transparent electrode layer and a first conductive layer, a common electrode having a conductive portion and a light transmitting portion formed within the unit pixel and connected to the common electrode line, the conductive portion formed along a periphery of the common electrode including a second transparent electrode layer and a second conductive layer, and the light transmitting portion including a third transparent electrode layer disposed in a middle portion of the common electrode includes a third transparent electrode layer, and a pixel electrode having a slit region arranged to face the common electrode.Type: ApplicationFiled: December 19, 2005Publication date: January 4, 2007Inventors: Sung-Soo Chang, Woo-Hyun Kim, In-Seob Kim, Dong-Hoon Lee
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Publication number: 20060262262Abstract: A liquid crystal display (“LCD”) devise includes a white sub-pixel that has a smaller size than other sub-pixels thereby increasing the brightness and the color purities of the other colors, which improves image quality. An LCD device has the common and pixel electrodes on the same substrate and may be formed of a transparent conductive material to increase the brightness further.Type: ApplicationFiled: May 19, 2006Publication date: November 23, 2006Inventors: Woo-Hyun Kim, Sung-Soo Chang