Patents by Inventor Dong-Wan Choi
Dong-Wan Choi 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: 20140118325Abstract: There are provided a liquid crystal display device and a driving method thereof, which can reduce power consumption and improve image quality. A liquid crystal display device includes pixels, a data driver and at least one gate driver. The pixels are positioned at intersection portions of gate lines and data lines. The data driver supplies a data signal having a first or second polarity to the data lines. The at least one gate driver supplies, to the gate lines, a first gate signal corresponding to the first polarity and a second gate signal corresponding to the second polarity.Type: ApplicationFiled: August 22, 2013Publication date: May 1, 2014Inventors: Chang-Jin Im, Dong-Wan Choi, Hee-Kwon Eun
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Publication number: 20140118221Abstract: A two side display device includes: a flexible substrate including a first substrate part, a second substrate part under the first substrate part, and a bending part coupling the first substrate part to the second substrate part; a first display panel on the first substrate part and configured to display a first image in a first direction; a second display panel under the second substrate part and configured to display a second image in a second direction opposite the first direction; and a driving chip coupled to the first substrate part. According to exemplary embodiments, first and second display panels are positioned on the same surface of a flexible substrate and configured to display images in opposing directions by bending the flexible substrate, which may reduce the thickness and manufacturing cost of the two side display device.Type: ApplicationFiled: March 7, 2013Publication date: May 1, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Jin-Oh Park, Dong-Wan Choi, Hyo-Sang Yang
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Publication number: 20140049449Abstract: A dual-display device includes a flexible substrate comprising first and second surfaces opposing each other, the first surface comprising a first area and a second area, the flexible substrate being bent to allow the first and second areas of the first surface to face each other, the second surface comprising first and second areas opposing the first and second areas of the first surface, respectively. The device further includes a first display unit formed over the first area of the second surface of the bent flexible substrate, and realizing an image; a second display unit formed over second area that is opposite to the first area of the second surface of the bent flexible substrate, electrically connected to the first display unit via lines, and realizing another image; and a common driver unit electrically connected to a pad area that extends from the first display unit, and configured to transmit at least a signal to drive the first display unit and the second display unit.Type: ApplicationFiled: January 28, 2013Publication date: February 20, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Jin-Oh Park, Dong-Wan Choi, Hyo-Sang Yang
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Patent number: 8576210Abstract: A display apparatus is disclosed. The display includes a display panel, a signal transmitter, and a driving chip. The signal transmitter is electrically connected with the display panel at a first bonding region of the display panel and receives an input signal from the outside. Further, the driving chip is electrically connected with the display panel at a second bonding region of the display panel and outputs a driving signal in response to the input signal. Further, the signal transmitter includes a base layer, a first conductive layer that is electrically connected with the display panel, and a second conductive layer that covers the first bonding region and the second bonding region. The second conductive layer can block electro static discharge and electro magnetic interference, such that it is possible to prevent display quality of the display apparatus from being deteriorated.Type: GrantFiled: September 15, 2011Date of Patent: November 5, 2013Assignee: Samsung Display Co., Ltd.Inventors: Hyo-Sang Yang, Byung-Chang Shim, Dong-Wan Choi, Hee-Kwon Eun
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Publication number: 20120182718Abstract: A display device includes first and second display panels, a first backlight assembly including a first light source that emits first light and a first reflective sheet that reflects the first light, and a second backlight assembly including a second light source that emits second light. A chromaticity coordinate region of the second light is different from a chromaticity coordinate region of the first light. The second backlight also assembly includes a second reflective sheet that reflects the second light and includes a second material different from a first material of the first reflective sheet. The first reflective sheet reflects the first light as third light toward the first display panel, and the second reflective sheet reflects the second light as fourth light toward the second display panel. A chromaticity coordinate region of the third light and a chromaticity coordinate region of the fourth light are substantially the same.Type: ApplicationFiled: September 22, 2011Publication date: July 19, 2012Inventors: Sangmin Yi, Dong Wan Choi
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Publication number: 20120162201Abstract: A stereoscopic display apparatus is disclosed. In one embodiment, the apparatus includes: a display unit which includes left eye image areas displaying a left eye image and right eye image areas displaying a right eye image and a parallax barrier which keeps a predetermined distance from the display unit to face the display unit and includes slits transmitting light emitted from the display unit and barriers blocking the light emitted from the display unit, wherein the slits and the barriers are alternately formed at the parallax barrier. The apparatus may further include a vibrator which is combined with at least a part of the parallax barrier and expands and contracts in a direction in which the display unit emits the light.Type: ApplicationFiled: September 21, 2011Publication date: June 28, 2012Applicant: Samsung Mobile Display Co., Ltd.Inventors: Dong-Wan Choi, Hyo-Sang Yang, Byung-Chang Shim, Hee-Kwon Eun
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Publication number: 20120113084Abstract: A liquid crystal display (LCD) and a driving method thereof are disclosed. According to some aspects the liquid crystal display (LCD) includes: a display unit including a plurality of pixels arranged in a matrix, a gate line respectively connected to the plurality of pixel rows, and a data line respectively connected to a plurality of pixel columns. The LCD further includes a gate driver configured to generate and sequentially transmit a plurality of gate signals to a plurality of pixel rows through the gate line by row to turn on a switch included in the pixel. The LCD further includes a data driver configured to apply a data voltage according to an image data signal to the pixel during a period in which the switch is turned on; and a common voltage generator configured to generate and apply a common voltage having a polarity that is opposite to the polarity of the data voltage to the pixel.Type: ApplicationFiled: August 10, 2011Publication date: May 10, 2012Applicant: Samsung Mobile Display Co., Ltd.Inventors: Hyo-Sang Yang, Byung-Chang Shim, Dong-Wan Choi, Seo-Hee Ha, Hee-Kwon Eun
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Publication number: 20120113073Abstract: A display apparatus is disclosed. The display includes a display panel, a signal transmitter, and a driving chip. The signal transmitter is electrically connected with the display panel at a first bonding region of the display panel and receives an input signal from the outside. Further, the driving chip is electrically connected with the display panel at a second bonding region of the display panel and outputs a driving signal in response to the input signal. Further, the signal transmitter includes a base layer, a first conductive layer that is electrically connected with the display panel, and a second conductive layer that covers the first bonding region and the second bonding region. The second conductive layer can block electro static discharge and electro magnetic interference, such that it is possible to prevent display quality of the display apparatus from being deteriorated.Type: ApplicationFiled: September 15, 2011Publication date: May 10, 2012Applicant: Samsung Mobile Display Co., Ltd.Inventors: Hyo-Sang Yang, Byung-Chang Shim, Dong-Wan Choi, Hee-Kwon Eun
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Publication number: 20110077079Abstract: The present invention relates to a rhythm action game, and, more particularly, a rhythm action game using a terminal equipped with a keypad. Using the rhythm action game described in the present invention, a user selects the number of keys that are used to hit note images while playing the game, so that a game mode is determined, and thus the difficulty level of the game can be determined. Further, the present invention notifies the user who is playing the game of the results of note-based games, not only using images, but also using vibrations. Further, the present invention provides sync information for respective types of terminals, thus enabling the play of music to be synchronized with the output of images.Type: ApplicationFiled: April 15, 2009Publication date: March 31, 2011Applicant: ANBSOFT CO., LTD.Inventors: Jang Cheon Ahn, Dong Wan Choi
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Publication number: 20100177498Abstract: A light source unit configured to shield electromagnetic interference (EMI) due to high frequencies radiated from internal circuits and a display device having the light source unit is provided. The display device includes a display panel displaying an image, a light source supplying light to the display panel, and a first circuit board having the light source mounted thereon and an EMI shielding pattern formed on at least one surface thereof.Type: ApplicationFiled: October 21, 2009Publication date: July 15, 2010Inventors: DONG-WAN CHOI, Hyo-Sang Yang, Hee-Kwon Eun, Seung-Jun Lee
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Publication number: 20090284692Abstract: A display device includes a display panel including a display area and a non-display area defined therein, and a protective substrate disposed on a viewing side of the display panel. At least one light receiving element is provided in the non-display area, and a focusing pattern is disposed on the protective substrate corresponding to a location at which the light receiving element is disposed.Type: ApplicationFiled: February 27, 2009Publication date: November 19, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyo-Sang YANG, Dong-Wan CHOI, Hee-Kwon EUN
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Publication number: 20090184912Abstract: A liquid crystal display includes a voltage providing unit for providing a common voltage which is a direct-current (DC) voltage level in each of a plurality of first periods of time, in each of a plurality of second periods of time, and in each of a plurality of third periods of time, wherein each first period of time is separated from each second period of time by at least one third period of time, wherein the DC voltage levels in at least one first period of time, at least one second period of time, and at least one third period of time are different from each other.Type: ApplicationFiled: July 23, 2008Publication date: July 23, 2009Inventors: Hee-Kwon Eun, Byung-Chang Shim, Dong-Wan Choi, Hyo-Sang Yang
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Publication number: 20080198118Abstract: A driving circuit for a display panel comprising a driving voltage generator for outputting a plurality of gamma reference voltages, and a gray scale voltage generating unit for selecting one out of the plurality of gamma reference voltages and generating a gray scale voltage based on the selected gamma reference voltage, a liquid crystal display having the driving circuit, and a method for driving the liquid crystal display. A gamma reference voltage is dynamically changed depending on a user's selection, so that a gray scale voltage is changed, thereby varying the gamma characteristic and the viewing angle of an output image. Accordingly, a user can actively control the gamma characteristic and the viewing angle of an output image to be suitable for a user's preference and environment.Type: ApplicationFiled: October 31, 2007Publication date: August 21, 2008Inventor: Dong Wan Choi
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Publication number: 20080192193Abstract: A noise preventing film includes a base layer, a conductive layer stacked on the base layer, a noise preventing layer stacked on the conductive layer, and a noise preventing particle distributed in the noise preventing layer. An LCD device includes the noise preventing film, and a method for manufacturing the noise preventing film is provided.Type: ApplicationFiled: January 31, 2008Publication date: August 14, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byung-Chang SHIM, Hee-Kwon EUN, Dong-Wan CHOI, Sang-Woo KIM
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Patent number: 7391401Abstract: An apparatus for driving a liquid crystal display includes a data driver alternately applying first data voltages and second voltages to pixels for a horizontal period and a signal controller changing a state of an inversion signal between an end of the transmission of first image data corresponding to the first data voltages and a start of the transmission of second image data corresponding the second data voltages and the polarity of the common voltage between an end of the application of the data voltages for a row and a start of the application of the data voltages for a next row.Type: GrantFiled: December 3, 2003Date of Patent: June 24, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Hwan Kim, Dong-Wan Choi, Bo-Young An
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Publication number: 20060055655Abstract: In a driving unit and a display apparatus, a master driving chip includes a common voltage generator configured to receive power and generate a master common voltage and a slave common voltage and a first data driver configured to output a master image signal based on the master common voltage and a master data signal. A slave driving chip includes a second data driver configured to output a slave image signal based on the slave common voltage from the common voltage generator and a slave data signal. Accordingly, the malfunction of the driving unit and the display apparatus may be prevented.Type: ApplicationFiled: September 13, 2005Publication date: March 16, 2006Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong-Wan Choi, Dong-Hwan Kim, Byung-Chang Shim
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Publication number: 20040196232Abstract: An apparatus for driving a liquid crystal display includes a data driver alternately applying first data voltages and second voltages to pixels for a horizontal period and a signal controller changing a state of an inversion signal between an end of the transmission of first image data corresponding to the first data voltages and a start of the transmission of second image data corresponding the second data voltages and the polarity of the common voltage between an end of the application of the data voltages for a row and a start of the application of the data voltages for a next row.Type: ApplicationFiled: December 3, 2003Publication date: October 7, 2004Inventors: Dong-Hwan Kim, Dong-Wan Choi, Bo-Young An