Patents by Inventor Cheol-Woo Park

Cheol-Woo Park 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).

  • Patent number: 9019200
    Abstract: A method of driving an electro-wetting display panel including a pixel part is provided. In the method, data voltages are applied to the electro-wetting display panel during a first time of a frame. The frame has the first time and a second time. The first time has a plurality of horizontal periods. The data voltages are generated based on reference gamma voltages. At least one of reference gamma voltages of one of the horizontal periods is different from another of the reference gamma voltages of another of the horizontal periods. A reset voltage is applied to the electro-wetting display panel during the second time of the frame.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: April 28, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Hyun-Sik Hwang, Uk-Chul Choi, Su-Hyeong Park, Cheol-Woo Park, Ji-Myoung Seo, Yong-Jun Jang
  • Publication number: 20150103065
    Abstract: A display device and a method of operating the same is disclosed. In one aspect, the display device includes a display panel having a plurality of pixels electrically connected to a plurality of data lines and a power supply configured to generate at least one bias voltage. The display device also includes a charge share controller configured to calculate voltage differences between current data voltages and previous data voltages and to generate at least one charge share control signal based on the voltage differences. The display device further includes a data driver configured to selectively perform a charge share operation or a precharge operation based on the charge share control signal. The charge share operation includes electrically connecting at least two of the data lines to each other and the precharge operation includes applying the bias voltage to the data lines.
    Type: Application
    Filed: April 7, 2014
    Publication date: April 16, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jung-Taek Kim, Cheol-Woo PARK, Eun-Ho LEE, Kyoung-Ho LIM
  • Publication number: 20150103101
    Abstract: A display device and a driving method for converting a low-resolution image into a high-resolution image and preventing a visible boundary between partitioned display areas are disclosed. One inventive aspect includes a display panel, a dividing control unit and a scaler. The display panel includes panel areas. The dividing control unit divides an input image into sub-images and the scaler scales the sub-images. The inventive aspect further includes an extra image removing unit and a driver. The extra image removing unit removes an scaled extra image from the scaled sub-image so that the driver provides the processed sub-image to the corresponding panel area.
    Type: Application
    Filed: February 20, 2014
    Publication date: April 16, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Eun-Ho LEE, Jung-Taek KIM, Cheol-Woo PARK, Bong-Hyun YOU, Hyun-Dae LEE, Ji-Woong JEONG
  • Patent number: 9001027
    Abstract: The present invention applies the voltage that is swung to the notch electrode of each pixel of the electrowetting display device to reset the oil layer to not backflow such that an additional element is not disposed in the pixel, thereby increasing the aperture ratio of the pixel. Also, the reset signal generator generating and applying the reset signal is disposed inside the electrowetting display device such that additional wiring may not be disposed in the outer part of the panel.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: April 7, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Uk Chul Choi, Cheol Woo Park, Hyun Sik Hwang, Yong Jun Jang
  • Patent number: 9002880
    Abstract: An apparatus for searching for a space object SOI. The apparatus includes a Space Of Interest (SOI) data base (DB) including a plurality of space object SOIs and relationship objects, a search input unit configured to receive at least one of the plurality of space object SOIs and a search word from a user, a relationship display unit configured to output at least one relationship object with respect to the received at least one space object SOI, a relationship selection unit configured to receive a selection for a portion of the output relationship objects from the user, a search processing unit configured to perform searching on the SOI DB based on the selected relationship object, the received space object SOI, and a search word, and a search output unit configured to output a searching result for the searching.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: April 7, 2015
    Assignee: Hyundai Motor Company
    Inventors: Cheol-Woo Park, Soon-Sung Kwon, Hong-Hoi Kim
  • Patent number: 9001106
    Abstract: A display apparatus includes a display panel, a gate driver, and a data driver. The display panel includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels connected to the gate lines and the data lines to display an image. The gate driver is configured to apply a gate signal to the gate lines and the data driver is configured to apply a data signal to the data lines. At least one intermediate voltage having a voltage level between a first voltage and a second voltage and a data voltage corresponding to a specific gray scale are sequentially applied to at least one pixel of the pixels as the data signal during a frame period.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: April 7, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Uk Chul Choi, Cheol Woo Park, Hyun Sik Hwang, Yongjun Jang
  • Publication number: 20150081659
    Abstract: A searching system and a searching method are provided and perform packaged searching for information regarding a plurality of objects displayed on a map. As a result, searching may be performed on searching target objects selected by a user, and keywords may be mapped to the selected search target objects to enable packaged searching.
    Type: Application
    Filed: December 27, 2013
    Publication date: March 19, 2015
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Cheol-Woo Park, Hong-Hoi Kim
  • Patent number: 8982108
    Abstract: A display device including: a display panel; and a signal controller which controls signals for driving the display panel, where the signal controller includes a representative value generator which sequentially operates a portion of image data of one frame, where the representative value generator moves a last position digit into another position digit of the portion of the image data and generates a representative value representing a portion of a frame image corresponding to the portion of the image data; a storage portion which stores the representative value therein; and a comparator which compares the representative values of present and prior frames to determine whether the portion of the frame image is a still image or a motion picture, and the signal controller controls the signals for driving the display panel such that a driving frequency for the still image is lower than a driving frequency for the motion picture.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: March 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyoung Won Lee, Seung Seok Nam, Cheol Woo Park, Kyoung Ho Lim, Dae-Gwang Jang, Gi Geun Kim, Eun Ho Lee, Ung Gyu Min, Seok Ha Hong
  • Publication number: 20150071550
    Abstract: An apparatus for detecting an afterimage candidate region includes: a comparison unit which compares gradation data of an n-th frame with integrated gradation data of an (n?1)-th frame and generates integrated gradation data of the n-th frame, where n is a natural number; a memory which provides the integrated gradation data of the (n?1)-th frame to the comparison unit and stores the integrated gradation data of the n-th frame; and an afterimage candidate region detection unit which detects an afterimage candidate region based on the integrated gradation data of the n-th frame, where each of the integrated gradation data of the n-th frame and the integrated gradation data of the (n?1)-th frame comprises a comparison region and a gradation region.
    Type: Application
    Filed: March 11, 2014
    Publication date: March 12, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Yong Jun JANG, Nam Gon CHOI, Joon Chul GOH, Gi Geun KIM, Geun Jeong PARK, Cheol Woo PARK, Yun Ki BAEK, Jeong Hun SO, Dong Gyu LEE
  • Publication number: 20150070343
    Abstract: A display device includes a display panel including a plurality of scan lines, a plurality of data lines which crosses the plurality of scan lines, and a plurality of pixels that is connected to the plurality of scan lines and the plurality of data lines, a scan driving unit which provides a plurality of scan signals, each of which includes a scan-on signal and a scan-off signal, to the plurality of scan lines, a data driving unit that provides data voltages to the plurality of data lines, and a timing control unit that determines an order in which the scan signals are provided to the plurality of scan lines, where the scan-on signal is provided to each of the plurality of scan lines based on an order of averages of the data voltages transferred to the pixels connected thereto.
    Type: Application
    Filed: March 11, 2014
    Publication date: March 12, 2015
    Applicant: Samsung Display Co. Ltd.
    Inventors: Eun Ho LEE, Su Hyeong PARK, Jung Taek KIM, Cheol Woo PARK, Ji Woong JEONG
  • Publication number: 20150062105
    Abstract: A display device includes a timing controller configured to generate an image signal including a pre-emphasis voltage, a data driver configured to generate a plurality of data signals based on the image signal, and provide information about whether the image signal is normally received or not to the timing controller, and a display panel configured to receive the plurality of data signals and display images corresponding to the received data signals, where when the data driver fails to normally receive the image signal, the timing controller increases a level of the pre-emphasis voltage.
    Type: Application
    Filed: January 22, 2014
    Publication date: March 5, 2015
    Applicant: Samsung Display Co. Ltd.
    Inventors: Dong Won PARK, Cheol Woo PARK, Bong Hyun YOU
  • Publication number: 20150049274
    Abstract: A display apparatus includes: a display panel including a gate line, a data line, a switching element connected to the gate line and the data line, a liquid crystal capacitor having a first terminal connected to the switching element, and a storage capacitor having a first terminal connected to the switching element; and a leakage current generating part which generates a leakage current in the switching element.
    Type: Application
    Filed: May 19, 2014
    Publication date: February 19, 2015
    Applicant: Samsung Display Co., LTD.
    Inventors: Sang-Mi KIM, Kyoung-Won LEE, Ho-Yong JUNG, Cheol-Woo PARK, Tae-Hyeong AN, Hee-Soon JEONG
  • Publication number: 20150049123
    Abstract: A display device includes: a similar gray level block detector configured to detect a pixel data block in which a gray level difference between a plurality of pixel data included in an image signal is smaller than or equal to a threshold; a skin tone detector configured to detect the pixel data block including a skin tone; and a gamma processor configured to apply a first gamma to a plurality of pixel data included in the pixel data block when the pixel data block does not include the skin tone and apply a second gamma to the plurality of pixel data included in the pixel data block when the pixel data block includes the skin tone.
    Type: Application
    Filed: February 10, 2014
    Publication date: February 19, 2015
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Nam-Gon CHOI, Joon-Chul GOH, Gi Geun KIM, Yun Ki BAEK, Yong Jun JANG, Ah Reum KIM, Geun Jeong PARK, Cheol Woo PARK, Jeong-Hun SO, Dong Gyu LEE
  • Patent number: 8952883
    Abstract: 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: Grant
    Filed: November 7, 2008
    Date of Patent: February 10, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Il-Pyung Lee, Sung-Jin Hong, Cheol-Woo Park, Yong-Woo Lee
  • Publication number: 20150035739
    Abstract: A gate-on voltage applied to a third gate line connected to the current stage pixel is configured to be applied during any one or more of a first pre-charge period, a second pre-charge period, and a main-charge period. Data voltages are applied, in order, to a before-previous stage pixel, a previous stage pixel, and a current stage pixel, and the signal controller is configured to control the gate driver to selectively apply the gate-on voltage to the gate line connected to the current stage pixel during at least one of the first pre-charge period while the before-previous stage pixel is being charged and the second pre-charge period while the previous stage pixel is charged, so as to at least partially pre-charge the current stage pixel.
    Type: Application
    Filed: July 24, 2014
    Publication date: February 5, 2015
    Inventors: Ji-Woong JEONG, Jung-Taek KIM, Eun Ho LEE, Cheol Woo PARK
  • Patent number: 8947425
    Abstract: A method of processing a 3D image data includes calculating shift values of gray-scales for a reference view using a 3D effect selection signal having a selection depth value of the 3D image inputted by a user. Shift values of the gray-scales respectively corresponding to a plurality of views are calculated using the shift values of the gray-scales for the reference view. The shift values of the gray-scales respectively corresponding to the plurality of views are applied to a source image signal to generate a plurality of image frames.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: February 3, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Mun-San Park, Joo-Young Kim, Cheol-Woo Park
  • Patent number: 8879039
    Abstract: An LCD device is disclosed. The LCD device includes a liquid crystal panel configured to include a bonding portion formed in its one edge, pluralities of gate and data lines arranged on it, and pixel regions defined by the gate and data lines. The bonding portion includes: first metal patterns formed away from each other and on a substrate of the liquid crystal panel; a gate insulation film and a protective layer sequentially formed to cover the first metal patterns; and a second metal pattern formed on the protective layer and electrically connected to the first metal patterns partially exposed by contact holes which are formed by partially etching the gate insulation film and protective layer.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: November 4, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Lee Young Kim, Cheol Woo Park, Jung Ho Park, Hye Jung Lee, Jong Seuk Kang, Kyung Ho Lee, Hoe Woo Koo
  • Publication number: 20140247289
    Abstract: An image processing method includes: receiving an input image signal (IIS); doubling the IIS into frames; determining a TGM mode to control an order in which gamma curves (GC) are to be applied to the doubled IIS, the GCs including first and second GCs; applying the GCs to the doubled IIS based on the TGM mode to generate a doubled, TGM-processed image signal (DTIS); correcting the DTIS to generate a corrected image signal (CIS); and dither-processing the CIS to generate an output image signal. The dither-processing of the CIS includes: performing dither-processing by sequentially applying dithering patterns (DP) of a first DP set to the CIS in association with first ones of the frames with respect to the first GC, and performing the dither-processing by sequentially applying DPs of a second DP set to the CIS in association with second ones of the frames with respect to the second GC.
    Type: Application
    Filed: August 27, 2013
    Publication date: September 4, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Geun Jeong PARK, Nam-Gon CHOI, Jung-Taek KIM, Yong Jun JANG, Jin-Woong JEONG, Cheol Woo PARK
  • Publication number: 20140240367
    Abstract: A luminance adjustment part includes a luminance determination part and a data compensation part. The luminance determination part may determine a control value for controlling luminance of a backlight assembly using linear image data that has a linear luminance profile and is generated by performing a de-gamma process on a first copy of input image data that has a nonlinear luminance profile. The compensation part may compensate pixel data that corresponds to pixels of a display panel using the control value, the pixel data being generated using a second copy of the input image data. Thus, color distortion of a displayed image as perceived by a viewer may be minimized when power consumption of a display apparatus that includes the display panel is decreased.
    Type: Application
    Filed: July 9, 2013
    Publication date: August 28, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jung-Taek KIM, Cheol-Woo PARK, Yun-Ki BAEK, Kyoung-Ju SHIN, Hee-Soon JEONG
  • Patent number: D722333
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: February 10, 2015
    Assignee: Huizhou TCL Mobile Communication Co., Ltd.
    Inventors: Jinai Lin, Cheol Woo Park, Hongxia Leng