Patents by Inventor Il-Pyung Lee
Il-Pyung 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: 8952883Abstract: The present invention relates to a driving method of an electrophoretic display. The driving method of the electrophoretic display includes displaying a first gray at a first pixel and a second pixel, where a target gray of the first pixel is the first gray and a target gray of the second pixel is a second gray, and changing the second pixel from the first gray to the second gray.Type: GrantFiled: November 7, 2008Date of Patent: February 10, 2015Assignee: Samsung Display Co., Ltd.Inventors: Il-Pyung Lee, Sung-Jin Hong, Cheol-Woo Park, Yong-Woo Lee
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Patent number: 8698733Abstract: Disclosed is an electrophoretic display and a method for driving the electrophoretic display. The method for driving the electrophoretic display, which includes a first electrode, a second electrode, and an electrophoretic layer including electrophoretic particles disposed in a plurality of pixels receiving the voltage for driving from the first electrode and the second electrode and provided between the first electrode and the second electrode includes applying a reset voltage to the pixels, applying a reset compensation voltage including reversed polarity to the reset voltage to the pixels, applying an image display voltage including the same or different polarity during a predetermined time between the neighboring pixels, and applying an image display compensation voltage including reversed polarity to the image display voltage to the pixels during a predetermined time.Type: GrantFiled: June 6, 2008Date of Patent: April 15, 2014Assignee: Samsung Display Co., Ltd.Inventors: Sung-Jin Hong, Il-Pyung Lee, Jae-Byung Park, Yong-Woo Lee, Sung-Hoon Yang
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Patent number: 8373668Abstract: Disclosed are embodiments of an electrophoretic display apparatus and an operating method thereof. According to one or more embodiments, an update voltage compensating for the degradation of an image is applied to a related pixel after a predetermined time interval elapses, when a plurality of images are consecutively displayed on one screen. Thus, the update voltage may be prevented from being applied to the pixel before the image degradation occurs, thereby preventing the pixel from being over-charged.Type: GrantFiled: December 17, 2008Date of Patent: February 12, 2013Assignee: Samsung Display Co., Ltd.Inventors: Il-Pyung Lee, Cheol-Woo Park, Ho-Yong Jung, Joo-Young Kim
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Patent number: 8310439Abstract: An apparatus for driving an electrophoretic display comprising a data driver applying data voltages to a plurality of pixels where electrophoretic particles are respectively disposed includes a memory storing gray information, level information of data voltages, and application time information of the data voltage, and a signal controller, wherein the signal controller reads the gray information, the level information of the data voltage and the application time information of the data voltage stored in the memory to apply an output image signal to the data driver, again stores the updated application time information of the data voltage to the memory by counting the application time information of the data voltage, compares the gray information stored in the memory with the gray information newly input from the external device, and when the gray information stored in the memory and the gray information newly input are different from each other, again stores the level information of the data voltage and the aType: GrantFiled: March 6, 2008Date of Patent: November 13, 2012Assignee: Samsung Display Co., Ltd.Inventors: Il-Pyung Lee, Cheol-Woo Park, Ho-Yong Jung
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Patent number: 8300072Abstract: An electrophoretic display (“EPD”) includes a display panel displaying an image and a gray-scale generator generating a gray-scale and providing a gray-scale voltage to the display panel. The gray-scale generator generates a gray-scale value of a white color using gray-scale values of red, green and blue colors and a brightness ratio between the red, green and blue colors. When a pure color is displayed, the EPD prevents the gray-scale of the white color from being fixed to 0. Thus, the EPD may enhance a chroma of the pure color and color brightness, thereby improving a display quality thereof.Type: GrantFiled: October 31, 2007Date of Patent: October 30, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Il-Pyung Lee, Cheol-Woo Park
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Patent number: 8035661Abstract: The driving apparatus of a display device calculates a slope using a minimum gray, a maximum gray, a gray average of frame data in a current frame, and a gray average of frame data in a previous frame, and corrects and outputs the input frame data according to the slope, using frame data of one frame. As a result, a gray range of the input image signal can be extended, thereby improving visibility. Further, in a case of a motion picture, even when a difference of a gray range of images of adjacent frames is large, an original image is not distorted due to extension of a gray range. Also, even when noise is included in the input image signal, a gray range can be extended after removing the noise.Type: GrantFiled: December 10, 2007Date of Patent: October 11, 2011Assignees: Samsung Electronics Co., Ltd., Postech Academy-Industry FoundationInventors: Il-Pyung Lee, Cheol-Woo Park, Jae-Byung Park, Hak-Gyu Kim, Min-Gu Lee, Sung-Gu Lee, Ung-Jin Jang
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Patent number: 7719756Abstract: A display apparatus according to one or more embodiments includes an array substrate and an opposite substrate facing the array substrate. Pixels areas are defined in the array substrate, and each pixel area includes a pixel electrode having concave-convex patterns at the edges thereof when viewed in a plan view. The concave-convex patterns vary directions of fringe fields generated from the edges of the pixel electrode, so that an area in which a fringe field is formed relative to one pixel area may be prevented from overlapping with a peripheral pixel area.Type: GrantFiled: November 17, 2008Date of Patent: May 18, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Mee-Hye Jung, Jae-Byung Park, Chong-Chul Chai, Il-Pyung Lee, Kwang-Chul Jung
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Publication number: 20090244105Abstract: The present invention relates to a driving method of an electrophoretic display. The driving method of the electrophoretic display includes displaying a first gray at a first pixel and a second pixel, where a target gray of the first pixel is the first gray and a target gray of the second pixel is a second gray, and changing the second pixel from the first gray to the second gray.Type: ApplicationFiled: November 7, 2008Publication date: October 1, 2009Applicant: Samsung Electronics Co., Ltd.Inventors: Il-Pyung LEE, Sung-Jin Hong, Cheol-Woo Park, Yong-Woo Lee
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Publication number: 20090231266Abstract: Disclosed are embodiments of an electrophoretic display apparatus and an operating method thereof. According to one or more embodiments, an update voltage compensating for the degradation of an image is applied to a related pixel after a predetermined time interval elapses, when a plurality of images are consecutively displayed on one screen. Thus, the update voltage may be prevented from being applied to the pixel before the image degradation occurs, thereby preventing the pixel from being over-charged.Type: ApplicationFiled: December 17, 2008Publication date: September 17, 2009Inventors: Il-Pyung Lee, Cheol-Woo Park, Ho-Yong Jung, Joo-Young Kim
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Publication number: 20090207475Abstract: A display apparatus according to one or more embodiments includes an array substrate and an opposite substrate facing the array substrate. Pixels areas are defined in the array substrate, and each pixel area includes a pixel electrode having concave-convex patterns at the edges thereof when viewed in a plan view. The concave-convex patterns vary directions of fringe fields generated from the edges of the pixel electrode, so that an area in which a fringe field is formed relative to one pixel area may be prevented from overlapping with a peripheral pixel area.Type: ApplicationFiled: November 17, 2008Publication date: August 20, 2009Inventors: Mee-Hye Jung, Jae-Byung Park, Chong-Chul Chai, Il-Pyung Lee, Kwang-Chul Jung
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Publication number: 20090046114Abstract: An apparatus for driving an electrophoretic display comprising a data driver applying data voltages to a plurality of pixels where electrophoretic particles are respectively disposed includes a memory storing gray information, level information of data voltages, and application time information of the data voltage, and a signal controller, wherein the signal controller reads the gray information, the level information of the data voltage and the application time information of the data voltage stored in the memory to apply an output image signal to the data driver, again stores the updated application time information of the data voltage to the memory by counting the application time information of the data voltage, compares the gray information stored in the memory with the gray information newly input from the external device, and when the gray information stored in the memory and the gray information nexly input are different from each other, again stores the level information of the data voltage and the aType: ApplicationFiled: March 6, 2008Publication date: February 19, 2009Inventors: Il-Pyung Lee, Cheol-Woo Park, Ho-Yong Jung
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Publication number: 20080278433Abstract: An electrophoretic display (“EPD”) includes a display panel displaying an image and a gray-scale generator generating a gray-scale and providing a gray-scale voltage to the display panel. The gray-scale generator generates a gray-scale value of a white color using gray-scale values of red, green and blue colors and a brightness ratio between the red, green and blue colors. When a pure color is displayed, the EPD prevents the gray-scale of the white color from being fixed to 0. Thus, the EPD may enhance a chroma of the pure color and color brightness, thereby improving a display quality thereof.Type: ApplicationFiled: October 31, 2007Publication date: November 13, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Il-Pyung LEE, Cheol-Woo PARK
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Publication number: 20080246779Abstract: The driving apparatus of a display device calculates a slope using a minimum gray, a maximum gray, a gray average of frame data in a current frame, and a gray average of frame data in a previous frame, and corrects and outputs the input frame data according to the slope, using frame data of one frame. As a result, a gray range of the input image signal can be extended, thereby improving visibility. Further, in a case of a motion picture, even when a difference of a gray range of images of adjacent frames is large, an original image is not distorted due to extension of a gray range. Also, even when noise is included in the input image signal, a gray range can be extended after removing the noise.Type: ApplicationFiled: December 10, 2007Publication date: October 9, 2008Applicants: SAMSUNG ELECTRONICS CO., LTD., POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Il-Pyung LEE, Cheol-Woo PARK, Jae-Byung PARK, Hak-Gyu KIM, Min-Gu LEE, Sung-Gu LEE, Ung-Jin JANG
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Publication number: 20080136761Abstract: In a display apparatus, a data driver converts a first group of image data into a first data voltage based on a first gamma reference voltage during a first period and converts a second group of the image data into a second data voltage based on a second gamma reference voltage during the first period. The data driver converts the first group into the second image voltage during a second period and converts the second group into the first data voltage during the second period. First and second pixel groups receive the first and second data voltages to display first and second gray-scale images, respectively, during the first period, and receive the second and first data voltages to display the second and first gray-scale images, respectively, during the second period. Thus, display quality and viewing angle characteristic of the display apparatus are improved and flicker is prevented.Type: ApplicationFiled: October 29, 2007Publication date: June 12, 2008Inventors: Sung-Jin Hong, Cheol-Woo Park, Il-Pyung Lee, Young-Chol Yang