Patents by Inventor Hyun Cheol HWANG
Hyun Cheol HWANG 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: 20240063229Abstract: A display device is provided.Type: ApplicationFiled: November 3, 2023Publication date: February 22, 2024Inventors: June Hwan KIM, Tae Young KIM, Jong Woo PARK, Young Tae CHOI, Hyun Cheol HWANG, Ki Ju IM
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Patent number: 11848330Abstract: A display device is provided.Type: GrantFiled: May 15, 2020Date of Patent: December 19, 2023Assignee: Samsung Display Co., Ltd.Inventors: June Hwan Kim, Tae Young Kim, Jong Woo Park, Young Tae Choi, Hyun Cheol Hwang, Ki Ju Im
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Publication number: 20230189567Abstract: A display device includes an organic light emitting diode, a first transistor driving the organic light emitting diode, a second transistor transmitting a data signal to the first transistor, a third transistor transmitting a first power voltage to the first transistor, wherein a semiconductor pattern of the first transistor is disposed over a semiconductor pattern of the second transistor, a semiconductor pattern of the third transistor is disposed over the semiconductor pattern of the first transistor, a lower transistor insulating film is disposed between the semiconductor pattern of the first transistor and the semiconductor pattern of the second transistor, and an upper transistor insulating film is disposed between the semiconductor pattern of the first transistor and the semiconductor pattern of the third transistor.Type: ApplicationFiled: December 20, 2022Publication date: June 15, 2023Applicant: Samsung Display Co., LTD.Inventors: June Hwan KIM, Tae Young KIM, Jong Woo PARK, Ki Ju IM, Ji Ho MOON, Hyun Cheol HWANG
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Patent number: 11538879Abstract: A display device includes an organic light emitting diode, a first transistor driving the organic light emitting diode, a second transistor transmitting a data signal to the first transistor, a third transistor transmitting a first power voltage to the first transistor, wherein a semiconductor pattern of the first transistor is disposed over a semiconductor pattern of the second transistor, a semiconductor pattern of the third transistor is disposed over the semiconductor pattern of the first transistor, a lower transistor insulating film is disposed between the semiconductor pattern of the first transistor and the semiconductor pattern of the second transistor, and an upper transistor insulating film is disposed between the semiconductor pattern of the first transistor and the semiconductor pattern of the third transistor.Type: GrantFiled: November 19, 2020Date of Patent: December 27, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: June Hwan Kim, Tae Young Kim, Jong Woo Park, Ki Ju Im, Ji Ho Moon, Hyun Cheol Hwang
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Patent number: 11475835Abstract: 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: GrantFiled: April 9, 2021Date of Patent: October 18, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: 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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Patent number: 11232754Abstract: A display device includes: a substrate; a gate pattern disposed on the substrate; an oxide semiconductor layer disposed on the substrate, the oxide semiconductor layer includes a channel region that overlaps with the gate pattern; and an insulating film disposed on the gate pattern, the insulating film includes majority carrier supporting ions, wherein the gate pattern includes a plurality of gate holes, wherein the gate holes are formed inside a region of the gate pattern that does not overlap with the channel region of the oxide semiconductor layer, and wherein the channel region of the oxide semiconductor layer includes the majority carrier supporting ions.Type: GrantFiled: February 10, 2020Date of Patent: January 25, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ki Ju Im, Tae Young Kim, Hyo Jung Kim, Jong Woo Park, Young Tae Choi, Hyun Cheol Hwang
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Patent number: 11205388Abstract: A method of operating a display device may include the following steps: in a first frame period, before turning off a gate initialization transistor, changing an initialization voltage from a first level to a second level and subsequently returning the initialization voltage to the first level; in a second frame period, before turning off the gate initialization transistor, changing the initialization voltage from the first level to the second level and/or a third level and subsequently returning the initialization voltage to the first level. The display device may include the gate initialization transistor and a driving transistor. A first electrode the gate initialization transistor may receive the initialization voltage. A second electrode of the gate initialization transistor may be electrically connected to a gate electrode of the driving transistor. The first level, the second level, and the third level may be unequal to each other.Type: GrantFiled: May 7, 2020Date of Patent: December 21, 2021Inventors: Ki Ju Im, Jong Woo Park, Hyun Cheol Hwang
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Publication number: 20210256906Abstract: 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: April 9, 2021Publication date: August 19, 2021Inventors: 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: 20210249491Abstract: A display device includes an organic light emitting diode, a first transistor driving the organic light emitting diode, a second transistor transmitting a data signal to the first transistor, a third transistor transmitting a first power voltage to the first transistor, wherein a semiconductor pattern of the first transistor is disposed over a semiconductor pattern of the second transistor, a semiconductor pattern of the third transistor is disposed over the semiconductor pattern of the first transistor, a lower transistor insulating film is disposed between the semiconductor pattern of the first transistor and the semiconductor pattern of the second transistor, and an upper transistor insulating film is disposed between the semiconductor pattern of the first transistor and the semiconductor pattern of the third transistor.Type: ApplicationFiled: November 19, 2020Publication date: August 12, 2021Applicant: Samsung Display Co., LTD.Inventors: June Hwan KIM, Tae Young KIM, Jong Woo PARK, Ki Ju IM, Ji Ho MOON, Hyun Cheol HWANG
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Patent number: 11017719Abstract: 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: GrantFiled: September 11, 2019Date of Patent: May 25, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: 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: 20210134227Abstract: A method of operating a display device may include the following steps: in a first frame period, before turning off a gate initialization transistor, changing an initialization voltage from a first level to a second level and subsequently returning the initialization voltage to the first level; in a second frame period, before turning off the gate initialization transistor, changing the initialization voltage from the first level to the second level and/or a third level and subsequently returning the initialization voltage to the first level. The display device may include the gate initialization transistor and a driving transistor. A first electrode the gate initialization transistor may receive the initialization voltage. A second electrode of the gate initialization transistor may be electrically connected to a gate electrode of the driving transistor. The first level, the second level, and the third level may be unequal to each other.Type: ApplicationFiled: May 7, 2020Publication date: May 6, 2021Inventors: Ki Ju Im, Jong Woo Park, Hyun Cheol Hwang
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Publication number: 20210104558Abstract: A display device is provided.Type: ApplicationFiled: May 15, 2020Publication date: April 8, 2021Inventors: June Hwan KIM, Tae Young KIM, Jong Woo PARK, Young Tae CHOI, Hyun Cheol HWANG, Ki Ju IM
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Publication number: 20200258453Abstract: A display device includes: a substrate; a gate pattern disposed on the substrate; an oxide semiconductor layer disposed on the substrate, the oxide semiconductor layer includes a channel region that overlaps with the gate pattern; and an insulating film disposed on the gate pattern, the insulating film includes majority carrier supporting ions, wherein the gate pattern includes a plurality of gate holes, wherein the gate holes are formed inside a region of the gate pattern that does not overlap with the channel region of the oxide semiconductor layer, and wherein the channel region of the oxide semiconductor layer includes the majority carrier supporting ions.Type: ApplicationFiled: February 10, 2020Publication date: August 13, 2020Inventors: Ki Ju Im, Tae Young Kim, Hyo Jung Kim, Jong Woo Park, Young Tae Choi, Hyun Cheol Hwang
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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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Patent number: 9127727Abstract: A method of searching for a sync start in an automated manual transmission, may include a slip preparing step of operating, in a parked position, a sleeve and a clutch restrained so as not to rotate into a slip state, an actuator operating step of moving the sleeve toward a clutch gear from a neutral position, a clutch speed determination step of determining whether or not a speed of rotation of the clutch has decreased by the actuator operating step, a stop determination step of determining whether or not a movement of the sleeve that was driven by the actuator operating step has stopped, and a first position determination step of determining a point where the clutch speed determination step determines that the speed of the rotation of the clutch has decreased and the stop determination step determines that the movement of the sleeve has stopped as the sync start.Type: GrantFiled: March 13, 2013Date of Patent: September 8, 2015Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORP.Inventors: Young Min Yoon, Hyun Cheol Hwang
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Publication number: 20140163829Abstract: A method of searching for a sync start in an automated manual transmission, may include a slip preparing step of operating, in a parked position, a sleeve and a clutch restrained so as not to rotate into a slip state, an actuator operating step of moving the sleeve toward a clutch gear from a neutral position, a clutch speed determination step of determining whether or not a speed of rotation of the clutch has decreased by the actuator operating step, a stop determination step of determining whether or not a movement of the sleeve that was driven by the actuator operating step has stopped, and a first position determination step of determining a point where the clutch speed determination step determines that the speed of the rotation of the clutch has decreased and the stop determination step determines that the movement of the sleeve has stopped as the sync start.Type: ApplicationFiled: March 13, 2013Publication date: June 12, 2014Applicants: Kia Motors Corp., Hyundai Motor CompanyInventors: Young Min YOON, Hyun Cheol HWANG
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Publication number: 20140107899Abstract: A reference position setting method for an automated manual transmission on which actuators driven by motors are mounted without a position sensor for detecting a position of each finger is capable of initializing a reference position of the finger as rapidly and accurately as possible.Type: ApplicationFiled: December 10, 2012Publication date: April 17, 2014Applicants: Kia Motors Corporation, Hyundai Motor CompanyInventors: Young Min YOON, Hyun Cheol HWANG