Patents by Inventor Jung-hwan Cho

Jung-hwan Cho 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: 8648788
    Abstract: A display apparatus includes a plurality of frame rate controllers that generate a motion interpolated intermediate image. The frame rate controllers exchange image information with adjacent frame rate controllers. According to the display apparatus, each frame rate controller displays the intermediate image on a corresponding display area based on the image information provided from the adjacent frame rate controller.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: February 11, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Sung Bae, Jung-Hwan Cho, Bong-Hyun You, Jun-Pyo Lee, Jung-Won Kim, Sang-Soo Kim, Seon-Ki Kim, Hee-Jin Choi
  • Publication number: 20140015820
    Abstract: A method to drive a display device includes: transmitting at least one data voltage to one or more of a plurality of data lines, scanning one or more of a plurality of gate lines to enable transmission of a gate signal in association with a first frame of a first hold section of a first still image section associated with display of a still image, and scanning one or more of the plurality of gate lines to enable transmission of the gate signal every frame of a first refresh section. The first still image section comprises the first refresh section.
    Type: Application
    Filed: November 5, 2012
    Publication date: January 16, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Yong-Jun Choi, Hyun Seok Ko, Po-Yun Park, Min Joo Lee, Jung-Hwan Cho
  • Patent number: 8537176
    Abstract: A method and apparatus capable of reducing or preventing dithering noises in 3D dither for displaying stereoscopic or 3D images are provided. The method entails generating image data in which two consecutive frames have the same dithered image data.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: September 17, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Seok Ko, Seung-Hwan Moon, Jung-Hwan Cho, Myeong-Su Kim
  • Publication number: 20130215094
    Abstract: A display device includes a display panel that includes a first pixel and a second pixel, the first pixel being associated with a positive pixel voltage relative to a data voltage and being associated with a first leakage current, the second pixel being associated with a negative pixel voltage relative to the data voltage and being associated with a second leakage current. The display device further includes a gate driver for providing a first gate-off voltage having a first value to at least one of the first pixel and the second pixel, the first value being in a range determined based on an equality-enabling value, wherein a value of the first leakage current is equal to a value of the second leakage current if the first gate-off voltage having the equality-enabling value is provided to the at least one of the first pixel and the second pixel.
    Type: Application
    Filed: August 7, 2012
    Publication date: August 22, 2013
    Applicant: SAMSUNG DISPLAY GO., LTD.
    Inventors: Yong-Jun CHOI, Jae-Suk CHOI, Seung Hwan MOON, Po-Yun PARK, Min Joo LEE, Jung Hwan CHO
  • Publication number: 20130141473
    Abstract: A method of driving a display panel includes: applying a data signal to the display panel during a sub-active interval based on a data enable signal, and blocking the data signal applied to the display panel during the sub-blanking interval. In such an embodiment, the data enable signal is activated during the sub-active interval and deactivated during the sub-blanking interval, a frame is divided into a plurality of sub-frames, and each of the sub-frames is divided into the sub-active interval and the sub-blanking interval.
    Type: Application
    Filed: June 22, 2012
    Publication date: June 6, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Gyeong-Ub MOON, Ga-Na KIM, Kyoung-Phil KIM, Jung-Hwan CHO, Myeong-Su KIM
  • Publication number: 20130135283
    Abstract: A display device includes a display panel including a plurality of pixels, a data driver which transmits data voltages to the plurality of pixels, and a signal controller which receives an input image signal and an input control signal to control the data driver, where the signal controller calculates a ratio of a first type of pattern in a image based on the input image signal, generates a polarity signal based on the ratio of the first type of pattern, and transmits the polarity signal to the data driver.
    Type: Application
    Filed: March 22, 2012
    Publication date: May 30, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Youn Jin JUNG, Jae-Won JEONG, Kwan-Young OH, Po-Yun PARK, Jung Hwan CHO
  • Publication number: 20130135330
    Abstract: A display device includes a display panel having gate lines and data lines, a signal controller driving the display panel, a graphic processing unit transmitting input image data to the signal controller, a gate driver driving the gate lines, and a data driver driving the data lines. The display panel is driven at a first frequency when displaying a moving image and driven at a lower frequency when displaying a still image. The signal controller includes a frame memory storing the input image data, a calculator calculating a representative value of image data stored in the frame memory, a line memory storing the representative value, and a kick-back corrector generating auxiliary image data by correcting the representative value according to a kick-back voltage. The data driver applies an auxiliary voltage corresponding to the auxiliary image data to the data lines in a vertical blank period when displaying the still image.
    Type: Application
    Filed: May 30, 2012
    Publication date: May 30, 2013
    Inventors: Jae-Suk CHOI, Yong-Jun CHOI, Po-Yun PARK, Yun-Jae KIM, Min Joo LEE, Jung Hwan CHO
  • Publication number: 20130113811
    Abstract: A display device includes a display panel for displaying a still image and for displaying a motion picture. The display panel includes a gate line, a data line, a storage electrode line, a first switching element connected to the gate line and the date line, a storage connected to the switching element and the storage electrode line. The display device further includes a signal controller for providing controlling signals to drive the display panel. The display panel is driven at a first frequency when the motion picture is displayed. The display panel is driven at a second frequency lower than the first frequency when the still image is displayed. When the display panel is driven at the second frequency, a common voltage inputted to the storage electrode line changes.
    Type: Application
    Filed: March 16, 2012
    Publication date: May 9, 2013
    Inventors: Yong-Jun CHOI, Jae-Suk Choi, Po-Yun Park, Jung Hwan Cho, Min Joo Lee
  • Publication number: 20130106895
    Abstract: A display device capable of reducing power consumption and preventing luminance changes, and a driving method thereof are provided. The display device includes: a display panel displaying a still image and a motion picture; a signal controller controlling signals for driving the display panel; a graphic processing unit transmitting input image data to the signal controller; a light source unit irradiating the display panel with light; and a light source driver controlling signals for driving the light source unit, in which the signal controller includes a frame memory storing the input image data and controls the display panel so as to be driven at a first frequency or a second frequency, and the light source driver drives the light source unit at a first ratio when the display panel is driven at the first frequency and at a second ratio when the display panel is driven at the second frequency.
    Type: Application
    Filed: August 7, 2012
    Publication date: May 2, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae-Won JEONG, Kwan-Young OH, Po-Yun PARK, Jung Hwan CHO
  • Publication number: 20130100122
    Abstract: Provided is a method of driving a display panel, including: outputting first data voltages representing a left-eye image or a right-eye image to first signal lines among a plurality of signal lines of the display panel during a first period of a frame for rendering the left-eye or right-eye image of a three-dimensional (3D) image; outputting second data voltages representing the left-eye image or right-eye image for second signals among the plurality of signal lines of the display panel during a second period of the frame for rendering the left-eye or right-eye image of the 3D image; and stopping the data voltages from being outputted to the display panel during a third period of the frame.
    Type: Application
    Filed: May 17, 2012
    Publication date: April 25, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Gyeong-Ub MOON, Hyun-Seok KO, Jung-Hwan CHO
  • Publication number: 20130076760
    Abstract: A display device includes: a display panel displaying a still image and a motion picture; a display panel which displays a still image and a motion picture; a signal controller which controls signals to drive the display panel; and a graphics processing unit which transmits input image data to the signal controller, where the signal controller includes a frame memory which stores compressed image data generated by compressing the input image data, and a mixer which mixes compression recovered image data generated by recovering the compressed image data and the input image data to generate mixed image data.
    Type: Application
    Filed: July 10, 2012
    Publication date: March 28, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang Su HAN, Min Joo LEE, Po-Yun PARK, Youn Jin JUNG, Jung Hwan CHO
  • Patent number: 8399883
    Abstract: The present invention provides a nitrogen-oxide gas sensor that is able to measure nitric oxide and nitrogen dioxide at the same time and ensure measurement accuracy and long stability. For these purposes, the nitrogen-oxide gas sensor includes: an oxide ion conductive solid electrolyte; a primary film that contacts the solid electrolyte and is made of a p-type semi-conductor metal oxide; a secondary film that contacts the solid electrolyte and is made of a p-type semiconductor metal oxide; an n-type semiconductor metal oxide that is included in at least one of the primary and secondary films; a power source that applies electric power to the primary and secondary films by electrically connecting a primary node to the primary film and a secondary node to the secondary film; and a measurement unit that measures the electric potential difference between the primary and secondary nodes.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: March 19, 2013
    Assignees: Iljin Copper Foil Co., Ltd., Cios Inc.
    Inventors: Jin Su Park, Byung Young Yoon, Jung Won Park, Jung Hwan Cho, Sang Beom Kim
  • Publication number: 20130057565
    Abstract: In order to reduce power consumption of a display device when a still picture is to be displayed, a display area of the device is subdivided into a plurality of Still Picture Refresh Groups (SPRGoP's), with each SPRGoP consisting of n pixels. All n of the pixels are charged in every one of sequential frames when a motion picture mode is in effect. Less than all of the n pixels of each SPRGoP are refreshed in each frame of an N-frame refresh cycle when a still picture mode is in effect. Different schemes for cycling through the n pixels of each SPRGoP are disclosed.
    Type: Application
    Filed: January 17, 2012
    Publication date: March 7, 2013
    Inventors: Yong-Jun CHOI, Jae-Suk CHOI, Jung Hwan CHO
  • Publication number: 20130048604
    Abstract: A photoresist composition includes from about 20% to about 50% by weight of a polymer, from about 0.5% to about 1.5% by weight of a photo-acid generator, from about 0.01% to about 0.5% by weight of a photo absorber and the remainder includes an organic solvent. Also provided is a method of forming a fine pattern including forming a thin film on a substrate; forming a photoresist pattern by using a photoresist composition that includes from about 20% to about 50% by weight of a polymer, from about 0.5% to about 1.5% by weight of a photo-acid generator, from about 0.01% to about 0.5% by weight of a photo absorber and a remainder comprising an organic solvent; and patterning the thin film by using the photoresist pattern as an etch-stop layer to form a fine pattern.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 28, 2013
    Inventors: Min Kang, Jin-Ho Ju, Jong-Kwang Lee, Bong-Yeon Kim, Jeong-Won Kim, Deok-Man Kang, Jung-Hwan Cho, Kyung-Mi Choi
  • Publication number: 20130038639
    Abstract: A display device including a display panel displaying a still image and a moving image and a signal controller controlling signals to drive the display panel, wherein the signal controller includes a frame memory storing image data of the still image and providing the image data to the display panel, and the display panel is driven with a first scan ratio when displaying the moving image and is driven with a second scan ratio that is lower than the first scan ratio when displaying the still image.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 14, 2013
    Inventors: Young-Su HAN, Seung Hwan MOON, Jung Hwan CHO, Myeong-Su KIM, Jae Wan PARK, Jin-Soo KIM
  • Publication number: 20130038621
    Abstract: The present invention provides a display device with reduced power consumption and that reduces changes in luminance, and perceptibility of flicker, and a driving method thereof. A display device according to an exemplary embodiment comprises: a display panel configured to display a still image and a motion picture; a signal controller configured to control signals for driving the display panel; and a graphics processing unit configured to transmit input image data to the signal controller, wherein the signal controller comprises a frame memory configured to store the input image data, and the display panel is driven at a first frequency when the motion picture is displayed and the display panel is driven at a second frequency that is lower than the first frequency when the still image is displayed.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 14, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yong-Jun CHOI, Jae-Won JEONG, Jae-Suk CHOI, Seung-Ho BAEK, Joo Seok YEOM, Young-Su HAN, Myeong-Su KIM, Yun-Jae KIM, Jin-Soo KIM, Seung Hwan MOON, Po-Yun PARK, Jae Wan PARK, Kwan-Young OH, Min Joo LEE, Jung Hwan CHO
  • Publication number: 20130027379
    Abstract: A display device including a display panel, a gate driver, a data driver and a signal controller. The display panel includes gate lines and data lines, the gate driver is connected to the gate lines, the data driver is connected to the data lines and the signal controller controls the display panel, the gate driver, and the data driver. The signal controller includes a timing controller and a low voltage differential signaling (LVDS) receiving unit. The timing controller includes a frame memory. The display device further includes an analog-to-digital (AD) board including an LVDS transmission unit, wherein the LVDS transmission unit transmits a signal identifying a stopped image or a moving image to the LVDS receiving unit, and in response to the signal identifying the stopped image, the signal controller maintains the display of the same image on the display panel by using the frame memory.
    Type: Application
    Filed: January 5, 2012
    Publication date: January 31, 2013
    Inventors: Min Joo Lee, Po-Yun Park, Jung Hwan Cho
  • Patent number: 8318402
    Abstract: Disclosed are a photosensitive compound and a method of manufacturing the same. The photosensitive is composed of a naphthoquinonediazide sulfonic ester compound having at least one naphthoquinonediazide sulfoxy group, and having either at least one carboxy group with 1 to 8 carbon atoms or at least one alkoxy group with 1 to 8 carbon atoms, in one molecule.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: November 27, 2012
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Joo Hyeon Park, Seok Chan Kang, Jung Hwan Cho, Kyung Chul Son
  • Publication number: 20120293495
    Abstract: A method of driving a display panel includes outputting a data voltage of a first-eye data frame to a plurality of data lines of the display panel in a first normal frame, and outputting a partial line data voltage of the first-eye data frame to a first partial line of the plurality of data lines of the display panel in a first partial frame, where a polarity of the partial line data voltage of the first-eye data frame in the first partial frame is substantially the same as a polarity of the data voltage of the first-eye data frame outputted to the first partial line of the plurality of data lines in the first normal frame, and where an interval of the first partial frame is less than an interval of the first normal frame.
    Type: Application
    Filed: September 23, 2011
    Publication date: November 22, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jang-Hyun YEO, Jae-Wan PARK, Jung-Hwan CHO
  • Patent number: 8305337
    Abstract: In method of individually driving a plurality of light-emitting blocks of a light source module providing light to a display panel including a unit pixel, luminance of a first light-emitting block corresponding to a first image block that includes an out of gamut (OOG) data among a plurality of image blocks corresponding to the light-emitting blocks is boosted. A second light-emitting block corresponding to a second image block that does not include the OOG data is driven so that the second light-emitting block has luminance corresponding to a representative gray-scale of the second image block.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: November 6, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Sung Bae, Jung-Hwan Cho