Patents by Inventor Min-Hyuk Choi
Min-Hyuk 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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Patent number: 10891890Abstract: An artificial-reality device has a display with a plurality of pixels. In a calibration mode, the device determines gray-level values for the pixels using a uniform test image. Each pixel has a luminance level proportional to its gray-level value. The device groups the pixels into segments according to the luminance levels. For each of the segments, the device computes an overall luminance level and a luminance target according to the determined gray-level values. When the overall luminance level is below the luminance target for the segment, the device calculates calibration data, which either (i) increases the gray-level of each pixel in the segment by a specified amount or (ii) selects a gamma band for the segment corresponding to a difference between the luminance target and the overall luminance level. The device stores the calibration data. The device is configured to use the stored calibration data in subsequent display of images.Type: GrantFiled: August 13, 2019Date of Patent: January 12, 2021Assignee: FACEBOOK TECHNOLOGIES, LLCInventors: Min Hyuk Choi, Cheonhong Kim, Wook Jin Han
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Publication number: 20200394971Abstract: The disclosed computer-implemented method may include determining a frame rate for a current frame, where the frame rate dictates the amount of time the current frame is to be presented on a display. The display may be a backlight that is powered for a specified amount of time as part of a duty cycle. The method may further include calculating a backlight duty cycle time for the current frame. The backlight duty cycle time may include a minimum amount of powered time plus an additional amount of powered time that is dependent on the frame rate for the current frame. The method may further generate a drive signal for the display using the calculated backlight duty cycle time and driving the display using the generated drive signal. Various other methods, systems, and computer-readable media are also disclosed.Type: ApplicationFiled: August 20, 2019Publication date: December 17, 2020Inventors: Cheonhong Kim, Min Hyuk Choi, Rui Zhang, Samuel Gosselin
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Patent number: 9576535Abstract: A pixel includes an organic light emitting diode, a first driver and a second driver. The second driver controls an amount of current supplied from a first power source to the organic light emitting diode, corresponding to a previous data signal. The first driver stores a current data signal supplied from a data line and supplies the previous data signal to the second driver. In the pixel, the second driver includes a sixth transistor coupled between an initialization power source and a first node coupled to a gate electrode of a first transistor, the sixth transistor being configured to turn on when a first control signal is supplied; and a seventh transistor coupled between the first power source and a second node commonly coupled to the first and second drivers, the seventh transistor being configured to turn on when the first control signal is supplied.Type: GrantFiled: January 6, 2014Date of Patent: February 21, 2017Assignee: Samsung Display Co., Ltd.Inventors: Yong-Sung Park, Tak-Young Lee, Hai-Jung In, Bo-Yong Chung, Min-Hyuk Choi, Yong-Jae Kim
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Patent number: 9514678Abstract: A pixel includes a plurality of organic light emitting diodes, each of which including a cathode electrode coupled to a second power source, a pixel circuit coupled to a scan line and to a data line, the pixel circuit configured to control current supplied from a first power source to the organic light emitting diodes corresponding to a data signal supplied to the data line, and first transistors between the pixel circuit and respective ones of the organic light emitting diodes, the first transistors configured to be turned on or to be turned off when a low emission control signal is supplied to a first emission control line, wherein a scan signal supplied to the scan line is a first voltage, and wherein the low emission control signal is a second voltage that is different than the first voltage.Type: GrantFiled: May 13, 2014Date of Patent: December 6, 2016Assignee: Samsung Display Co., Ltd.Inventors: Yong-Sung Park, Min-Hyuk Choi, Dong-Gyu Kim
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Patent number: 8951083Abstract: The present invention relates to an organic light emitting device and a manufacturing method thereof. The present invention discloses an organic light emitting device including: a plurality of scanning signal lines; a first and second contact assistant; a plurality of data lines crossing the scanning signal lines; a driving voltage line; and a first pixel, a second pixel, and a third pixel alternately arranged, wherein each pixel includes: a switching transistor, a driving transistor including an output terminal, a pixel electrode connected to the output terminal, the pixel electrode including at least two layers including a transflective electrode, an organic light emitting member arranged on the pixel electrode, and a common electrode arranged on the organic light emitting member, wherein the first pixel further includes a supplementary member arranged on the pixel electrode, and wherein the first and second contact assistants include the same material as the supplementary member.Type: GrantFiled: January 28, 2014Date of Patent: February 10, 2015Assignee: Samsung Display Co., Ltd.Inventors: Min-Hyuk Choi, Chun-Gi You, Jong-Hyun Park, Young-Dong Kwon, Jin-Hee Kang
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Patent number: 8912996Abstract: A scan driver including sequentially arranged scan driving blocks, each of the blocks including a first node receiving a signal input into a driving signal input terminal based on a clock signal input into a second-clock-signal input terminal, a second node receiving a clock signal input into a first-clock-signal input terminal, a first transistor including a gate electrode connected to the second node, one electrode receiving an output control signal, and another electrode connected to an output terminal, a second transistor including a gate electrode connected to the first node, one electrode connected to a third-clock-signal input terminal, and another electrode connected to the output terminal, and a third transistor including a gate electrode connected to the third-clock-signal input terminal and one electrode connected to the first node and configured to transfer a voltage of the output terminal to the first node.Type: GrantFiled: April 18, 2012Date of Patent: December 16, 2014Assignee: Samsung Display Co., Ltd.Inventors: Yong-Jae Kim, Bo-Yong Chung, Dong-Beom Lee, Min-Hyuk Choi
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Publication number: 20140354518Abstract: A pixel includes a plurality of organic light emitting diodes, each of which including a cathode electrode coupled to a second power source, a pixel circuit coupled to a scan line and to a data line, the pixel circuit configured to control current supplied from a first power source to the organic light emitting diodes corresponding to a data signal supplied to the data line, and first transistors between the pixel circuit and respective ones of the organic light emitting diodes, the first transistors configured to be turned on or to be turned off when a low emission control signal is supplied to a first emission control line, wherein a scan signal supplied to the scan line is a first voltage, and wherein the low emission control signal is a second voltage that is different than the first voltage.Type: ApplicationFiled: May 13, 2014Publication date: December 4, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Yong-Sung Park, Min-Hyuk Choi, Dong-Gyu Kim
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Publication number: 20140198085Abstract: A pixel includes an organic light emitting diode, a first driver and a second driver. The second driver controls an amount of current supplied from a first power source to the organic light emitting diode, corresponding to a previous data signal. The first driver stores a current data signal supplied from a data line and supplies the previous data signal to the second driver. In the pixel, the second driver includes a sixth transistor coupled between an initialization power source and a first node coupled to a gate electrode of a first transistor, the sixth transistor being configured to turn on when a first control signal is supplied; and a seventh transistor coupled between the first power source and a second node commonly coupled to the first and second drivers, the seventh transistor being configured to turn on when the first control signal is supplied.Type: ApplicationFiled: January 6, 2014Publication date: July 17, 2014Applicant: Samsung Display Co., Ltd.Inventors: Yong-Sung Park, Tak-Young Lee, Hai-Jung In, Bo-Yong Chung, Min-Hyuk Choi, Yong-Jae Kim
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Publication number: 20140141681Abstract: The present invention relates to an organic light emitting device and a manufacturing method thereof. The present invention discloses an organic light emitting device including: a plurality of scanning signal lines; a first and second contact assistant; a plurality of data lines crossing the scanning signal lines; a driving voltage line; and a first pixel, a second pixel, and a third pixel alternately arranged, wherein each pixel includes: a switching transistor, a driving transistor including an output terminal, a pixel electrode connected to the output terminal, the pixel electrode including at least two layers including a transflective electrode, an organic light emitting member arranged on the pixel electrode, and a common electrode arranged on the organic light emitting member, wherein the first pixel further includes a supplementary member arranged on the pixel electrode, and wherein the first and second contact assistants include the same material as the supplementary member.Type: ApplicationFiled: January 28, 2014Publication date: May 22, 2014Applicant: Samsung Display Co., Ltd.Inventors: Min-Hyuk CHOI, Chun-Gi YOU, Jong-Hyun PARK, Young-Dong KWON, Jin-Hee KANG
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Patent number: 8653729Abstract: The present invention relates to an organic light emitting device and a manufacturing method thereof. The present invention discloses an organic light emitting device including: a plurality of scanning signal lines; a first and second contact assistant; a plurality of data lines crossing the scanning signal lines; a driving voltage line; and a first pixel, a second pixel, and a third pixel alternately arranged, wherein each pixel includes: a switching transistor, a driving transistor including an output terminal, a pixel electrode connected to the output terminal, the pixel electrode including at least two layers including a transflective electrode, an organic light emitting member arranged on the pixel electrode, and a common electrode arranged on the organic light emitting member, wherein the first pixel further includes a supplementary member arranged on the pixel electrode, and wherein the first and second contact assistants include the same material as the supplementary member.Type: GrantFiled: April 8, 2009Date of Patent: February 18, 2014Assignee: Samsung Display Co., Ltd.Inventors: Min-Hyuk Choi, Chun-Gi You, Jong-Hyun Park, Young-Dong Kwon, Jin-Hee Kang
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Patent number: 8514211Abstract: A display panel includes a power line supplying power, and a plurality of pixels connected with the power line, each pixel including a plurality of sub-pixel regions, and receiving the power to display an image. Each of the pixels further includes a plurality of driving thin film transistors and a plurality of light emitting units. Each of the driving thin film transistors are positioned in respective sub-pixel regions to receive the power to output driving signals. Each of the light emitting units are connected to respective driving thin film transistors, have relatively longer lengths in a first direction, and have the same width in a second direction substantially perpendicular to the first direction. One among the plurality of light emitting units is longer than the remaining light emitting units to thereby improve a light emitting efficiency and image display quality of a display panel.Type: GrantFiled: April 17, 2009Date of Patent: August 20, 2013Assignee: Samsung Display Co., Ltd.Inventors: Min-Hyuk Choi, Chun-Gi You, Jong-Hyun Park, Doo-Hyun Woo, Dong-Ki Lee, Young-Dong Kwon, Jin-Hee Kang
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Publication number: 20130127807Abstract: A scan driver including sequentially arranged scan driving blocks, each of the blocks including a first node receiving a signal input into a driving signal input terminal based on a clock signal input into a second-clock-signal input terminal, a second node receiving a clock signal input into a first-clock-signal input terminal, a first transistor including a gate electrode connected to the second node, one electrode receiving an output control signal, and another electrode connected to an output terminal, a second transistor including a gate electrode connected to the first node, one electrode connected to a third-clock-signal input terminal, and another electrode connected to the output terminal, and a third transistor including a gate electrode connected to the third-clock-signal input terminal and one electrode connected to the first node and configured to transfer a voltage of the output terminal to the first node.Type: ApplicationFiled: April 18, 2012Publication date: May 23, 2013Inventors: Yong-Jae KIM, Bo-Yong Chung, Dong-Beom Lee, Min-Hyuk Choi
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Patent number: 8053293Abstract: A display substrate includes a pixel, a signal transmission line, a first insulating layer and a test signal input part. The pixel is on an insulating substrate. The signal transmission line is on the insulating substrate to transmit an image signal. The first insulating layer is on the signal transmission line. The first insulating layer has a contact hole through which the signal transmission line is partially exposed. The test signal input part is on the first insulating layer, and includes an extended portion and a test signal pad. The extended portion is electrically connected to the signal transmission line through the contact hole, and is extended toward a side of the insulating substrate. The test signal pad is electrically connected to the extended portion. Therefore, the number of defects is decreased.Type: GrantFiled: July 20, 2007Date of Patent: November 8, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Bong-Ju Kim, Min-Hyuk Choi, Chun-Gi You, Young-Il Kim
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Patent number: 7948173Abstract: The present invention relates to an organic light emitting diode display and a method for manufacturing the same, including: a substrate; first signal lines formed on the substrate and including first pad units; second signal lines that intersect the first signal lines and include second pad units; first thin film transistors that are electrically connected to the first signal lines and the second signal lines; second thin film transistors that are electrically connected to the first thin film transistors; pixel electrodes that are electrically connected to the second thin film transistors; common electrodes facing the pixel electrodes; light emitting members that are formed between the pixel electrodes and the common electrodes; contact assistants that are formed on the first pad units and the second pad units; and protective partitions that enclose circumferences of the contact assistants.Type: GrantFiled: December 23, 2008Date of Patent: May 24, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Min-Hyuk Choi, Chun-Gi You, Dong-Ki Lee, Young-Dong Kwon, Jin-Hee Kang
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Publication number: 20100133990Abstract: An organic light emitting device includes a substrate including a display area and a peripheral area, a first signal line and a second signal line intersecting the first signal line, a switching thin film transistor electrically connected to the first signal line and the second signal line, a driving thin film transistor electrically connected to the switching thin film transistor, a pixel electrode electrically connected to the driving thin film transistor, a light emitting member disposed on the pixel electrode, a common electrode disposed on the light emitting member, a blocking member disposed on at least one of the first signal line and the second signal line in the peripheral area, the blocking member comprising protruding and recessed portions, and a sealant disposed on the blocking member, the sealant overlapping a portion of the blocking member.Type: ApplicationFiled: April 23, 2009Publication date: June 3, 2010Inventors: Sun PARK, Yul-Kyu LEE, Min-Hyuk CHOI, Young-Dong KWON
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Publication number: 20100090594Abstract: The present invention relates to an organic light emitting device and a manufacturing method thereof. The present invention discloses an organic light emitting device including: a plurality of scanning signal lines; a first and second contact assistant; a plurality of data lines crossing the scanning signal lines; a driving voltage line; and a first pixel, a second pixel, and a third pixel alternately arranged, wherein each pixel includes: a switching transistor, a driving transistor including an output terminal, a pixel electrode connected to the output terminal, the pixel electrode including at least two layers including a transflective electrode, an organic light emitting member arranged on the pixel electrode, and a common electrode arranged on the organic light emitting member, wherein the first pixel further includes a supplementary member arranged on the pixel electrode, and wherein the first and second contact assistants include the same material as the supplementary member.Type: ApplicationFiled: April 8, 2009Publication date: April 15, 2010Applicant: Samsung Electronics Co., Ltd.Inventors: Min-Hyuk Choi, Chun-Gi You, Jong-Hyun Park, Young-Dong Kwon, Jin-Hee Kang
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Publication number: 20100085342Abstract: A display panel includes a power line supplying power, and a plurality of pixels connected with the power line, each pixel including a plurality of sub-pixel regions, and receiving the power to display an image. Each of the pixels further includes a plurality of driving thin film transistors and a plurality of light emitting units. Each of the driving thin film transistors are positioned in respective sub-pixel regions to receive the power to output driving signals. Each of the light emitting units are connected to respective driving thin film transistors, have relatively longer lengths in a first direction, and have the same width in a second direction substantially perpendicular to the first direction. One among the plurality of light emitting units is longer than the remaining light emitting units to thereby improve a light emitting efficiency and image display quality of a display panel.Type: ApplicationFiled: April 17, 2009Publication date: April 8, 2010Inventors: Min-Hyuk CHOI, Chun-Gi You, Jong-Hyun Park, Doo-Hyung Woo, Dong-Ki Lee, Young-Dong Kwon, Jin-Hee Kang
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Publication number: 20090315451Abstract: The present invention relates to an organic light emitting diode display and a method for manufacturing the same, including: a substrate; first signal lines formed on the substrate and including first pad units; second signal lines that intersect the first signal lines and include second pad units; first thin film transistors that are electrically connected to the first signal lines and the second signal lines; second thin film transistors that are electrically connected to the first thin film transistors; pixel electrodes that are electrically connected to the second thin film transistors; common electrodes facing the pixel electrodes; light emitting members that are formed between the pixel electrodes and the common electrodes; contact assistants that are formed on the first pad units and the second pad units; and protective partitions that enclose circumferences of the contact assistants.Type: ApplicationFiled: December 23, 2008Publication date: December 24, 2009Inventors: Min-Hyuk CHOI, Chun-Gi You, Dong-Ki Lee, Young-Dong Kwon, Jin-Hee Kang
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Patent number: 7560316Abstract: A thin film transistor array panel includes interconnection members interposed between the underlying gate pads made of an Al-containing metal and the overlying contact assistants made of a transparent conductor such as ITO thereon to prevent corrosion of Al due to ITO, or gate-layer signal transmission lines. Gate-layer signal transmission lines are directly connected to the data-layer signal transmission line to prevent corrosion of Al due to ITO in the thin film transistor array panel according to an embodiment of the present invention. The color filters are formed on the thin film transistor array panel to prevent misalignment between the two display panels so as to increase the aperture ratio.Type: GrantFiled: October 11, 2007Date of Patent: July 14, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Seong-Kweon Heo, Chun-Gi You, Min-Hyuk Choi
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Publication number: 20090059109Abstract: An array substrate includes a transistor, a pixel electrode and an upper insulation layer. The transistor is formed on an upper insulation layer formed on a base substrate. The pixel electrode is electrically connected to the transistor. The upper insulation layer covers the transistor to directly make contact with the base substrate of an area having the pixel electrode formed thereon.Type: ApplicationFiled: April 1, 2008Publication date: March 5, 2009Inventors: Min-Hyuk Choi, Chun-Gi You, Seong-Kweon Heo