Patents by Inventor Sung-Jae Yun
Sung-Jae Yun 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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Publication number: 20120281173Abstract: A liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate, a pixel electrode disposed on the first substrate, a first alignment layer disposed on the first substrate and the pixel electrode, a second substrate facing the first substrate, a common electrode disposed on the second substrate, a second alignment layer disposed on the second substrate and the common electrode, and a liquid crystal layer disposed between the first substrate and the second substrate, in which the common electrode has a first opening having a cross shape, an edge of the first opening protrudes beyond an edge of the pixel electrode, and the pixel electrode includes a second opening disposed adjacently to at least one of the edges of the pixel electrode.Type: ApplicationFiled: May 2, 2012Publication date: November 8, 2012Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Oh Jeong KWON, Jae Hong PARK, Sung-Jae YUN, Hyeok Jin LEE, Mee Hye JUNG, Jiang SHUAI, Kyung Hye PARK, Jae-Hoon KIM
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Patent number: 8223305Abstract: A display device includes a first substrate, a second substrate which is disposed to face the first substrate, a liquid crystal layer which is disposed between the first substrate and the second substrate, a first electrode and a second electrode which are formed on the first substrate, and a protrusion which is disposed under one of the first electrode and the second electrode, the liquid crystal layer having an isotropic state when there is no applied electric field, and an anisotropic state when an electric field is applied.Type: GrantFiled: August 5, 2008Date of Patent: July 17, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Hong-jo Park, Hyeok-jin Lee, Sung-jae Yun, Hee-seop Kim
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Patent number: 8164696Abstract: A display apparatus includes a display panel, a first polarization part, and a second polarization part. The display panel includes an array substrate, an opposite substrate and an electro-optical material layer disposed between the array substrate and the opposite substrate. The electro-optical material layer reflects first circularly polarized light having a wavelength of a predetermined range and transmits second circularly polarized light having a phase difference with the first circularly polarized light. The first polarization part faces a rear face of the array substrate and converts incident light of the rear face into the first circularly polarized light. The second polarization part faces a front face of the opposite substrate and blocks the first circularly polarized light reflected from the electro-optical material layer and transmits the second circularly polarized light transmitted through the electro-optical material layer.Type: GrantFiled: October 1, 2009Date of Patent: April 24, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-Hong Park, Oh-Jeong Kwon, Hong-Jo Park, Hyeok-Jin Lee, Sung-Jae Yun, Hee-Seop Kim
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Publication number: 20120075542Abstract: A liquid crystal display includes a first substrate, a first pixel electrode, a second pixel electrode, a second substrate, and a liquid crystal layer. The first pixel electrode is formed on the first substrate. The second pixel electrode overlaps with at least a part of the pixel electrode with the first insulating layer interposed therebetween. The second pixel electrode has a plurality of elongated openings and applies a voltage to the liquid crystal layer that is different from the voltage the first pixel electrode applies to the liquid crystal layer.Type: ApplicationFiled: September 7, 2011Publication date: March 29, 2012Inventors: Heeseop KIM, Ohjeong KWON, Jae Hong PARK, Hyeokjin LEE, Sung-Jae YUN, Suk CHOI
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Publication number: 20120026421Abstract: A display panel includes a first substrate and a second substrate facing the first substrate. The second substrate includes a first electrode and a second electrode spaced apart from each other. A cholesteric liquid crystal having a pitch shorter than a wavelength of a visible ray and a rotation axis substantially perpendicular to the first and second substrates is disposed between the first and second substrates. The display panel displays a grayscale image in response to an electric field generated between the first and second electrodes. A polymer is added to the cholesteric liquid crystal, and a concentration of the polymer is controlled by exposing the polymer to a light. The concentration of the polymer in an area adjacent to the first substrate may be higher than the concentration of the polymer in an area adjacent to the second substrate.Type: ApplicationFiled: June 30, 2011Publication date: February 2, 2012Inventors: JAE HONG PARK, Suk Choi, Ohjeong Kwon, Hyelim Jang, Sung-Jae Yun, Hyeokjin Lee, Yong Woon Lim, Heeseop Kim
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Patent number: 8102344Abstract: A method for driving a display device includes: dividing an entire gray-scale region corresponding to a data gray scale into a first gray-scale region and a second gray-scale region and setting a first gamma value of the first gray-scale region and a second gamma value of the second gray-scale region, the first gamma value being smaller than the second gamma value; providing a first gray-scale display voltage corresponding to the data gray scale to a display panel during a first section of one horizontal period by using the first gamma value or the second gamma value selected by an inputted data gray scale; and providing a second gray-scale display voltage corresponding to a black gray scale to the display panel during a second section of the one horizontal period.Type: GrantFiled: March 12, 2008Date of Patent: January 24, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Seung-Hoon Lee, Jun-Woo Lee, Hee-Seop Kim, Eun-Hee Han, Hong-Jo Park, Sung-Jae Yun
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Patent number: 7986386Abstract: A base substrate includes a transmissive area and a reflective area. An insulation layer is formed on the base substrate to have an embossed pattern in correspondence with the transmissive area. A first pixel electrode includes a first transmissive electrode formed on the insulation layer of the embossed pattern, and a first reflective electrode formed on the base substrate in correspondence with the reflective area. A second pixel electrode includes a second transmissive electrode formed on the insulation layer of the embossed pattern corresponding to the transmissive area, and a second reflective electrode corresponding to the reflective area.Type: GrantFiled: April 1, 2009Date of Patent: July 26, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Oh-Jeong Kwon, Hyeok-Jin Lee, Hong-Jo Park, Sung-Jae Yun, Hee-Seop Kim
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Publication number: 20110170040Abstract: A liquid crystal display includes a liquid crystal display panel and a phase difference plate. The liquid crystal display panel includes an array substrate provided therein with pixel areas to display an image, an opposite substrate which faces the array substrate, and a blue-phase liquid crystal which is interposed between the array substrate and the opposite substrate. A reflective peak wavelength indicated by the peak reflectance of the blue-phase liquid crystal is positioned in the wavelength band of a visible light. The phase difference plate is provided above or below the liquid crystal display panel. The driving voltage and the memory ratio of the blue-phase liquid crystal are reduced, and the light leakage caused by a visible light selectively reflected by the blue-phase liquid crystal can be prevented.Type: ApplicationFiled: June 17, 2010Publication date: July 14, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Jae Hong Park, Ohjeong Kwon, Sung-Jae Yun, Hong-Jo Park, Hyeokjin Lee, Soon Joon Rho, Sung Hwan Hong, Jae-Soo Jang, Heeseop Kim, Sung-Hwan Hong, Byung-Chul Kim
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Publication number: 20110096255Abstract: A liquid crystal display that includes a first substrate, a second substrate facing the first substrate, liquid crystal disposed between the first substrate and the second substrate, wherein the liquid crystal is isotropic when no electric field is applied to the liquid crystal, and the liquid crystal is anisotropic when an electric field is applied to the liquid crystal, and an inner polarization layer formed on an inner surface of at least one of the first substrate and the second substrate.Type: ApplicationFiled: July 14, 2010Publication date: April 28, 2011Inventors: Soon-Joon Rho, Jae-Soo Jang, Sung-Jae Yun, Hyeok-Jin Lee, Jae-Hong Park, Hong-Jo Park, Sung-Hwan Hong, Oh-Jeong Kwon, Sung-Hwan Hong, Byung-Chul Kim, Hee-Seop Kim
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Publication number: 20100225569Abstract: The blue phase mode may include a photo polymerizing process to sustain the blue phase molecule alignment at room temperature which is called polymer stabilized blue phase (PBP) mode. The blue phase mode LCD or the PBP mode LCD may have a hysteresis characteristic. The hysteresis can be reduced by driving the LCD using an impulsive method.Type: ApplicationFiled: December 19, 2008Publication date: September 9, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hong-Jo PARK, Hyeok-Jin LEE, Sung-Jae YUN
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Publication number: 20100157177Abstract: A display apparatus includes a display panel, a first polarization part, and a second polarization part. The display panel includes an array substrate, an opposite substrate and an electro-optical material layer disposed between the array substrate and the opposite substrate. The electro-optical material layer reflects first circularly polarized light having a wavelength of a predetermined range and transmits second circularly polarized light having a phase difference with the first circularly polarized light. The first polarization part faces a rear face of the array substrate and converts incident light of the rear face into the first circularly polarized light. The second polarization part faces a front face of the opposite substrate and blocks the first circularly polarized light reflected from the electro-optical material layer and transmits the second circularly polarized light transmitted through the electro-optical material layer.Type: ApplicationFiled: October 1, 2009Publication date: June 24, 2010Inventors: Jae-Hong PARK, Oh-Jeong Kwon, Hong-Jo Park, Hyeok-Jin Lee, Sung-Jae Yun, Hee-Seop Kim
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Publication number: 20100141859Abstract: The present invention provides a display device including: a first substrate; a second substrate arranged opposite to the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate; and a UV-absorbing filter formed on each of the first substrate and the second substrate, wherein the liquid crystal layer undergoes a phase transition from an isotropic phase in the absence of a voltage to an anisotropic phase when an electric field is applied to the liquid crystal layer.Type: ApplicationFiled: December 4, 2009Publication date: June 10, 2010Inventors: Hong-Jo Park, Hyeok-Jin Lee, Oh-Jeong Kwon, Sung-Jae Yun, Hee-Seop Kim
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Publication number: 20100007825Abstract: A base substrate includes a transmissive area and a reflective area. An insulation layer is formed on the base substrate to have an embossed pattern in correspondence with the transmissive area. A first pixel electrode includes a first transmissive electrode formed on the insulation layer of the embossed pattern, and a first reflective electrode formed on the base substrate in correspondence with the reflective area. A second pixel electrode includes a second transmissive electrode formed on the insulation layer of the embossed pattern corresponding to the transmissive area, and a second reflective electrode corresponding to the reflective area.Type: ApplicationFiled: April 1, 2009Publication date: January 14, 2010Inventors: Oh-Jeong Kwon, Hyeok-Jin Lee, Hong-Jo Park, Sung-Jae Yun, Hee-Seop Kim
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Publication number: 20090219478Abstract: A display device includes a first substrate having first and second electrodes spaced apart from each other, a protrusion pattern portion disposed underneath at least one of the first and second electrodes, and a spacer portion on the same layer as the protrusion pattern portion and made of the same material as the protrusion pattern portion, a second substrate that faces the first substrate and includes a column spacer facing the spacer portion, and a liquid crystal layer disposed between the first and second substrates. The spacer portion and the column spacer function to maintain a gap between the first and second substrates. The liquid crystal layer is in an isotropic state when no electric field is applied and is in an anisotropic state when an electric field is applied.Type: ApplicationFiled: August 7, 2008Publication date: September 3, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hong-Jo PARK, Hyeok-Jin LEE, Sung-Jae YUN
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Publication number: 20090213285Abstract: A display device includes a first substrate including a protrusion electrode pattern, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The protrusion electrode pattern is made of a conductive polymer material, and a state of the liquid crystal layer changes from an isotropic state to an anisotropic state when an electric field is applied.Type: ApplicationFiled: October 28, 2008Publication date: August 27, 2009Applicant: Samsung Electronics Co., Ltd.Inventors: Sung-Jae YUN, Hae-Young Yun, Hyeok-Jin Lee, Hong-Jo Park
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Publication number: 20090153761Abstract: A display device includes a first substrate, a second substrate which is disposed to face the first substrate, a liquid crystal layer which is disposed between the first substrate and the second substrate, a first electrode and a second electrode which are formed on the first substrate, and a protrusion which is disposed under one of the first electrode and the second electrode, the liquid crystal layer having an isotropic state when there is no applied electric field, and an anisotropic state when an electric field is applied.Type: ApplicationFiled: August 5, 2008Publication date: June 18, 2009Inventors: Hong-jo Park, Hyeok-jin Lee, Sung-jae Yun, Hee-seop Kim
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Publication number: 20080224975Abstract: A method for driving a display device includes: dividing an entire gray-scale region corresponding to a data gray scale into a first gray-scale region and a second gray-scale region and setting a first gamma value of the first gray-scale region and a second gamma value of the second gray-scale region, the first gamma value being smaller than the second gamma value; providing a first gray-scale display voltage corresponding to the data gray scale to a display panel during a first section of one horizontal period by using the first gamma value or the second gamma value selected by an inputted data gray scale; and providing a second gray-scale display voltage corresponding to a black gray scale to the display panel during a second section of the one horizontal period.Type: ApplicationFiled: March 12, 2008Publication date: September 18, 2008Inventors: Seung-Hoon Lee, Jun-Woo Lee, Hee-Seop Kim, Eun-Hee Han, Hong-Jo Park, Sung-Jae Yun
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Publication number: 20080218463Abstract: A display device and a method for driving the same are disclosed. The display device driving method includes applying a first gray scale display voltage according to a first gamma curve to a liquid crystal layer during a first sub-frame period and applying a second gray scale display voltage according to a second gamma curve to the liquid crystal layer during a second sub-frame period. The first and second gamma curves are discontinuous at one or more gray scale values among all gray scale regions.Type: ApplicationFiled: February 15, 2008Publication date: September 11, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jun-Woo LEE, Hee-Seop KIM, Hong-Jo PARK, Eun-Hee HAN, Seung-Hoon LEE, Sung-Jae YUN
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Publication number: 20080129673Abstract: Disclosed are a display device and a method of driving the same that improve both moving image visibility and lateral visibility. A display panel including gate and data lines arranged in the form of a matrix for displaying an image, a gate driver for driving the gate line, and a data driver for supplying a low gray scale image signal, a high gray scale image signal, and a black impulsive signal to the data line within one frame period.Type: ApplicationFiled: December 4, 2007Publication date: June 5, 2008Inventors: Hee-Seop KIM, Jun-Woo Lee, Hong-Jo Park, Eun-Hee Han, Seung-Hoon Lee, Sung-Jae Yun