Patents by Inventor Dae-Youn Cho
Dae-Youn 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).
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Publication number: 20210074801Abstract: A display apparatus includes a substrate; a lower conductive layer including a protective pattern and an auxiliary conductive pattern on the substrate; a buffer layer on the lower conductive layer; an active pattern on the buffer layer and overlapping the protective pattern; a first insulation layer on the active pattern; and a first conductive layer on the first insulation layer, the first conductive layer including a gate electrode overlapping the active pattern and a load matching line overlapping the auxiliary conductive pattern.Type: ApplicationFiled: November 23, 2020Publication date: March 11, 2021Inventors: Ju Hee LEE, Jongwoo PARK, Youngtae CHOI, Dae Youn CHO
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Patent number: 10877521Abstract: A display device includes a flexible substrate, a display element on the flexible substrate and including a thin film transistor, a metal layer disposed at a lower portion of the flexible substrate, and an air layer formed between the flexible substrate and the metal layer.Type: GrantFiled: May 10, 2019Date of Patent: December 29, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyo Jung Kim, Tae Young Kim, Jong Woo Park, Dae Youn Cho, Ki Ju Im, Young Tae Choi
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Patent number: 10854143Abstract: An organic light-emitting display device includes a display unit having a plurality of pixel units. The display device also includes a timing controller for calculating a black bias pixel ratio (BBPR) of the display unit based on image signals provided by an external source and for generating a control signal based on the BBPR. The BBPR is the ratio of a number of pixel units in a black state to a total number of pixel units. A power supply unit provides a driving voltage to the display unit based on the control signal from the timing controller, wherein the power supply unit provides a first driving voltage to the display unit when the BBPR is less than a reference value and provides a second driving voltage, which is higher than the first driving voltage, otherwise.Type: GrantFiled: January 4, 2019Date of Patent: December 1, 2020Assignee: Samsung Display Co., Ltd.Inventors: Dae Youn Cho, Tae Young Kim, Hee Jin Kim, Jong Woo Park, Young Tae Choi
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Patent number: 10847601Abstract: A display apparatus includes a substrate; a lower conductive layer including a protective pattern and an auxiliary conductive pattern on the substrate; a buffer layer on the lower conductive layer; an active pattern on the buffer layer and overlapping the protective pattern; a first insulation layer on the active pattern; and a first conductive layer on the first insulation layer, the first conductive layer including a gate electrode overlapping the active pattern and a load matching line overlapping the auxiliary conductive pattern.Type: GrantFiled: July 16, 2019Date of Patent: November 24, 2020Assignee: Samsung Display Co., Ltd.Inventors: Ju Hee Lee, Jongwoo Park, Youngtae Choi, Dae Youn Cho
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Publication number: 20200327850Abstract: A pixel includes a light emitting device, a first transistor for controlling an amount of current flowing from a first power source to a second power source via the light emitting device, in response to a voltage applied to a first node, a second transistor coupled between a data line and a second node corresponding to a first electrode of the first transistor, and including a gate electrode coupled to a first scan line, a third transistor coupled between the first node and a third node corresponding to a second electrode of the first transistor, and including a gate electrode coupled to the first scan line, and a fourth transistor coupled between the third transistor and the third node, and configured to maintain a turn-on state.Type: ApplicationFiled: March 10, 2020Publication date: October 15, 2020Inventors: Dae Youn Cho, Ji Ho Moon, Jong Woo Park, Young Tae Choi
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Publication number: 20200243006Abstract: A display device includes a plurality of pixels. Each pixel includes a first transistor that controls an amount of current received from a first power supply voltage line connected via a second node to an organic light emitting diode in response to a voltage of a first node, a second transistor connected between a data line and the second node and that includes a first gate electrode connected to a first scan line, a light emitting line connected to a gate electrode of at least one light emitting transistor located in a current path between the first power supply voltage line and the organic light emitting diode, and a seventh transistor connected between one of at least one second gate electrode of the second transistor and the light emitting line. Accordingly, a threshold voltage of a switching transistor included in each of the plurality of pixels may be negatively shifted.Type: ApplicationFiled: September 11, 2019Publication date: July 30, 2020Inventors: Hyo Jung KIM, Tae Young KIM, Yong Sung Park, Jong Woo Park, Mi Seon SEO, Keun Soo LEE, Ki Ju IM, Dae Youn CHO, Young Tae CHOI, Hyun Cheol HWANG
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Publication number: 20200058241Abstract: A wiring-disconnection detecting circuit includes a low-power voltage supply, a monitoring wiring, and a wiring-disconnection determiner. The low-power voltage supply supplies a low-power voltage to a low-power voltage wiring that extends along a periphery of a display panel in a normal operating mode of the display panel and supplies a test voltage to the low-power voltage wiring in a wiring-disconnection detecting mode of the display panel. The monitoring wiring includes a first end connected to one point of the low-power voltage wiring and a second end at which a feedback voltage corresponding to the test voltage is output in the wiring-disconnection detecting mode. The wiring-disconnection determiner receives the feedback voltage from the second end, measures an RC delay of the feedback voltage, and determines that the low-power voltage wiring is disconnected when the RC delay is larger than a predetermined reference value.Type: ApplicationFiled: July 10, 2019Publication date: February 20, 2020Inventors: Jiho MOON, Dae Youn CHO, Jongwoo PARK, Ju Hee LEE, Youngtae CHOI
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Publication number: 20200044008Abstract: A display apparatus includes a substrate; a lower conductive layer including a protective pattern and an auxiliary conductive pattern on the substrate; a buffer layer on the lower conductive layer; an active pattern on the buffer layer and overlapping the protective pattern; a first insulation layer on the active pattern; and a first conductive layer on the first insulation layer, the first conductive layer including a gate electrode overlapping the active pattern and a load matching line overlapping the auxiliary conductive pattern.Type: ApplicationFiled: July 16, 2019Publication date: February 6, 2020Inventors: Ju Hee LEE, Jongwoo PARK, Youngtae CHOI, Dae Youn CHO
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Publication number: 20200035136Abstract: An inspection system for a display cell having a display part and a plurality of data lines connected to first and second pixel units of the display part. An array test part and a lighting test part are located in a peripheral area around the display part. An inspection apparatus is configured to provide the array test part with an array control signal to block an array data signal from being applied to a plurality of data lines in a period in which a white image is displayed and to provide the lighting test part with a lighting control signal to block a lighting data signal from being applied to a plurality of data lines during a period in which a black image is displayed, during a drive reliability test mode for displaying a test image including the black image and the white image.Type: ApplicationFiled: July 25, 2019Publication date: January 30, 2020Inventors: Dae Youn CHO, Hyunho KIM, Hyojung KIM, Young-Joo NOH, Jongwoo PARK, Ju Hee LEE, Jinwoo CHAE, Youngtae CHOI
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Publication number: 20200033914Abstract: A display device includes a flexible substrate, a display element on the flexible substrate and including a thin film transistor, a metal layer disposed at a lower portion of the flexible substrate, and an air layer formed between the flexible substrate and the metal layer.Type: ApplicationFiled: May 10, 2019Publication date: January 30, 2020Inventors: Hyo Jung KIM, Tae Young KIM, Jong Woo PARK, Dae Youn CHO, Ki Ju IM, Young Tae CHOI
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Publication number: 20190318690Abstract: A display device includes a pixel, a first control pad, a second control pad, and a first dummy pad. The pixel may emit light with luminance corresponding to a data signal. Supply of the data signal to the pixel depends on a first control signal and a second control signal. The first control pad is connected to a first control line for supplying the first control signal. The second control pad is connected to a second control line for supplying the second control signal. The first dummy pad is positioned between the first control pad and the second control pad and may receive a first dummy signal. A voltage level of the first dummy signal is in a range from a voltage level of the first control signal to a voltage level of the second control signal.Type: ApplicationFiled: April 3, 2019Publication date: October 17, 2019Inventors: Ju Hee LEE, Dae Youn CHO, Jong Woo PARK, Young Tae CHOI
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Publication number: 20190304378Abstract: An organic light emitting display device includes scan lines arranged in horizontal lines, data lines intersecting the scan lines, a pixel array including pixels coupled to the scan lines and the data lines, the pixels including at least first color pixels, a panel tester including switching elements coupled to first ends of the data lines, the switching elements including at least first and second switching elements, and a first line coupled to the first switching elements and a second line coupled to the second switching elements. Data lines of K-th to (K+L)-th (where K and L are natural numbers) first color pixels arranged in a predetermined horizontal line are coupled to the first line through the first switching elements, and data lines of at least a part of remaining first color pixels arranged in the predetermined horizontal line are coupled to the second line through the second switching elements.Type: ApplicationFiled: April 2, 2019Publication date: October 3, 2019Inventors: Dae Youn CHO, Sang Kil KIM, Hyo Jung KIM, Jong Woo PARK, Dong Gi AHN, Jong Won LEE, Ju Hee LEE, Young Tae CHOI
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Publication number: 20190213958Abstract: An organic light-emitting display device includes a display unit having a plurality of pixel units. The display device also includes a timing controller for calculating a black bias pixel ratio (BBPR) of the display unit based on image signals provided by an external source and for generating a control signal based on the BBPR. The BBPR is the ratio of a number of pixel units in a black state to a total number of pixel units. A power supply unit provides a driving voltage to the display unit based on the control signal from the timing controller, wherein the power supply unit provides a first driving voltage to the display unit when the BBPR is less than a reference value and provides a second driving voltage, which is higher than the first driving voltage, otherwise.Type: ApplicationFiled: January 4, 2019Publication date: July 11, 2019Inventors: Dae Youn Cho, Tae Young Kim, Hee Jin Kim, Jong Woo Park, Young Tae Choi
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Patent number: 8674624Abstract: A direct current to direct current converter includes: an input terminal; an output terminal having voltage higher than the input terminal; a coupled inductor boost cell including a coupled inductor connected to the input terminal, a switch connected to the coupled inductor, and an output diode connected to the output terminal; and a clamp and energy transfer cell including a clamp diode connected to the coupled inductor, a clamp capacitor connected to the clamp diode, and an energy transfer diode connected to the output diode.Type: GrantFiled: March 9, 2012Date of Patent: March 18, 2014Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Won Sik Oh, Gun Woo Moon, Shin Young Cho, Dae Youn Cho
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Publication number: 20130113390Abstract: A direct current to direct current converter includes: an input terminal; an output terminal having voltage higher than the input terminal; a coupled inductor boost cell including a coupled inductor connected to the input terminal, a switch connected to the coupled inductor, and an output diode connected to the output terminal; and a clamp and energy transfer cell including a clamp diode connected to the coupled inductor, a clamp capacitor connected to the clamp diode, and an energy transfer diode connected to the output diode.Type: ApplicationFiled: March 9, 2012Publication date: May 9, 2013Applicants: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, SAMSUNG ELECTRONICS CO., LTD.Inventors: Won Sik OH, Gun Woo MOON, Shin Young CHO, Dae Youn CHO
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Patent number: 8305332Abstract: A backlight unit of a liquid crystal display device supplies light to one or more corresponding pixels of a liquid crystal display panel. The backlight unit includes a plurality of blocks formed into a matrix shape. Each block includes a light emitting diode module. The blocks in a row of the matrix are driven by a same row driving signal and the blocks in a column of the matrix are driven by a same column driving signal, to adjust luminance of the light supplied to the corresponding pixels.Type: GrantFiled: August 8, 2008Date of Patent: November 6, 2012Assignees: Samsung Display Co., Ltd., Korea Advanced Institute Science & TechnologyInventors: Mun-Soo Park, Gun-Woo Moon, Won-Sik Oh, Dae-Youn Cho, Kyu-Min Cho, Nam-Deog Kim, Seung-Hwan Moon
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Publication number: 20090058792Abstract: A backlight unit of a liquid crystal display device supplies light to one or more corresponding pixels of a liquid crystal display panel. The backlight unit includes a plurality of blocks formed into a matrix shape. Each block includes a light emitting diode module. The blocks in a row of the matrix are driven by a same row driving signal and the blocks in a column of the matrix are driven by a same column driving signal, to adjust luminance of the light supplied to the corresponding pixels.Type: ApplicationFiled: August 8, 2008Publication date: March 5, 2009Inventors: Mun-Soo PARK, Gun-Woo Moon, Won-Sik Oh, Dae-Youn Cho, Kyu-Min Cho, Nam-Deog Kim, Seung-Hwan Moon
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Patent number: D904398Type: GrantFiled: February 19, 2019Date of Patent: December 8, 2020Assignee: Samsung Display Co., Ltd.Inventors: Jong Woo Park, Ju Hee Lee, Dae Youn Cho, Young Tae Choi