Patents by Inventor Doo Na Kim
Doo Na Kim 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: 20240145483Abstract: A display device includes a substrate, a semiconductor layer disposed on the substrate, and including a first channel portion, a second channel portion, a connecting portion disposed between the first channel portion and the second channel portion, and electrode regions, a first insulating layer disposed on the semiconductor layer, a gate conductor disposed on the first insulating layer and including a first gate electrode overlapping the first channel portion and a second gate electrode overlapping the second channel portion, signal lines disposed on the substrate, a first electrode electrically connected to at least one of electrode regions of the semiconductor layer, an emission layer disposed on the first electrode, and a second electrode disposed on the emission layer, and the first channel portion and the second channel portion of the semiconductor layer each have a first width greater than a second width of the connecting portion.Type: ApplicationFiled: January 5, 2024Publication date: May 2, 2024Inventors: Han Bit KIM, Mee Jae KANG, Keun Woo KIM, Doo-Na KIM, Sang Sub KIM, Do Kyeong LEE, Jae Hwan CHU
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Publication number: 20240121984Abstract: A display device including a pixel electrode, and a pixel circuit electrically connected to the pixel electrode. The pixel circuit includes a first transistor including sub-transistors electrically connected to each other through a first common node, a second transistor including sub-transistors electrically connected to each other through a second common node, a first electrode electrically connecting the first common node with the second common node, and a second electrode disposed to overlap the first electrode and electrically connected to a direct current power source.Type: ApplicationFiled: August 25, 2023Publication date: April 11, 2024Applicant: Samsung Display Co., LTD.Inventors: Han Bit KIM, Keun Woo KIM, Doo Na KIM, Sang Sub KIM, Chan Yeob SEOL, Jae Hwan CHU, Sang Gun CHOI
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Publication number: 20240029655Abstract: A pixel includes an organic light-emitting diode, a driving transistor, a first dual gate transistor, a first capacitor, and a compensation transistor. The organic light-emitting diode includes first and second terminals. The driving transistor generates the driving current and includes a first terminal to which a first power supply voltage is applied, a second terminal connected to the first terminal of the organic light-emitting diode, and a gate terminal. The first dual gate transistor is connected between the gate terminal of the driving transistor and the second terminal of the driving transistor and includes first and second sub-transistors. The first capacitor includes a first electrode to which the first power supply voltage is applied, and a second electrode connected to a first node that connects the first and second sub-transistors to each other. The compensation transistor includes a terminal connected between the second electrode and the first node.Type: ApplicationFiled: October 3, 2023Publication date: January 25, 2024Inventors: HANBIT KIM, TAEWOOK KANG, DOO-NA KIM, SANGSUB KIM, YUNJUNG OH, DOKYEONG LEE, JAEHWAN CHU
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Patent number: 11881487Abstract: A display device includes a substrate, a semiconductor layer disposed on the substrate, and including a first channel portion, a second channel portion, a connecting portion disposed between the first channel portion and the second channel portion, and electrode regions, a first insulating layer disposed on the semiconductor layer, a gate conductor disposed on the first insulating layer and including a first gate electrode overlapping the first channel portion and a second gate electrode overlapping the second channel portion, signal lines disposed on the substrate, a first electrode electrically connected to at least one of electrode regions of the semiconductor layer, an emission layer disposed on the first electrode, and a second electrode disposed on the emission layer, and the first channel portion and the second channel portion of the semiconductor layer each have a first width greater than a second width of the connecting portion.Type: GrantFiled: July 28, 2021Date of Patent: January 23, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Han Bit Kim, Mee Jae Kang, Keun Woo Kim, Doo-Na Kim, Sang Sub Kim, Do Kyeong Lee, Jae Hwan Chu
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Patent number: 11810511Abstract: A pixel includes an organic light-emitting diode, a driving transistor, a first dual gate transistor, a first capacitor, and a compensation transistor. The organic light-emitting diode includes first and second terminals. The driving transistor generates the driving current and includes a first terminal to which a first power supply voltage is applied, a second terminal connected to the first terminal of the organic light-emitting diode, and a gate terminal. The first dual gate transistor is connected between the gate terminal of the driving transistor and the second terminal of the driving transistor and includes first and second sub-transistors. The first capacitor includes a first electrode to which the first power supply voltage is applied, and a second electrode connected to a first node that connects the first and second sub-transistors to each other. The compensation transistor includes a terminal connected between the second electrode and the first node.Type: GrantFiled: May 11, 2022Date of Patent: November 7, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hanbit Kim, Taewook Kang, Doo-Na Kim, Sangsub Kim, Yunjung Oh, Dokyeong Lee, Jaehwan Chu
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Patent number: 11727882Abstract: A pixel includes: a capacitor connected between a first voltage line and a first node; a light emitting diode including a first electrode connected to a second node, and a second electrode connected to a second voltage line; a first transistor; a second transistor; a third transistor including a first electrode connected to the first node, a second electrode connected to the second node, and a gate electrode to receive a first scan signal; a fourth transistor including a first electrode connected to the first node, a second electrode connected to a third voltage line to receive a third voltage, and a gate electrode to receive a second scan signal; and a compensation transistor including a first electrode connected to the first node, a second electrode connected to a fourth voltage line to receive a compensation voltage, and a gate electrode to receive a compensation control voltage.Type: GrantFiled: September 29, 2021Date of Patent: August 15, 2023Assignee: Samsung Display Co., Ltd.Inventors: Hanbit Kim, Meejae Kang, Keunwoo Kim, Doo-Na Kim, Sangsub Kim, Do Kyeong Lee, Jaehwan Chu
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Patent number: 11617289Abstract: A display device includes a pixel including a pixel driving transistor and a pixel switching transistor, the pixel driving transistor including a first active layer including a first channel area having a first length, a first gate insulating layer on the first active layer, a first gate electrode on the first gate insulating layer, a first source electrode and a first drain electrode above the first gate electrode, the pixel switching transistor including a second active layer including a second channel area having a second length that is shorter than the first length, a second gate insulating layer on the second active layer, a second gate electrode on the second gate insulating layer, a second source and a second drain electrode above the second gate electrode, and wherein the pixel driving transistor and the pixel switching transistor each include a P-MOS transistor.Type: GrantFiled: April 29, 2021Date of Patent: March 28, 2023Assignee: Samsung Display Co., Ltd.Inventors: Keunwoo Kim, Doo-Na Kim, Meejae Kang, Thanh Tien Nguyen
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Patent number: 11615744Abstract: Provided is a display device. The display device comprises a substrate, and a plurality of sub-pixels disposed on the substrate and including alight emitting element and a sub-pixel circuit driving the light emitting element. The sub-pixel circuit comprises a driving transistor controlling a driving current flowing through the light emitting element, a first transistor and a second transistor connected in series between a first node, which is a drain electrode of the driving transistor, and a second node, which is a gate electrode of the driving transistor, to receive the same scan signal, and a gate auxiliary electrode disposed on a gate electrode of the first transistor or the second transistor. The gate auxiliary electrode is connected to the gate electrode of the first transistor or the second transistor.Type: GrantFiled: January 5, 2021Date of Patent: March 28, 2023Inventors: Keun Woo Kim, Tae Wook Kang, Doo Na Kim, Han Bit Kim, Jae Seob Lee, Jae Hwan Chu
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Patent number: 11600229Abstract: A pixel includes a first capacitor connected between a first electrode and a second electrode connected to a first node, a first transistor including a gate electrode connected to the first node, a first electrode connected to a second node, and a second electrode connected to a third node, a second transistor including a gate electrode that receives a data write gate signal, a first electrode that receives a data voltage, and a second electrode connected to the second node, a third transistor connected between the first node and the third node, a fourth transistor connected between the first node and an initialization voltage input terminal to which an initialization voltage is applied, an eighth transistor t connected to the third transistor and the fourth transistor, and an organic light emitting diode including an anode and a cathode receiving a second power supply voltage.Type: GrantFiled: March 1, 2022Date of Patent: March 7, 2023Inventors: Hanbit Kim, Meejae Kang, Keunwoo Kim, Doo-Na Kim, Sangsub Kim, Dokyeong Lee, Jaehwan Chu
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Publication number: 20230067920Abstract: A pixel includes an organic light-emitting diode, a driving transistor, a first dual gate transistor, a first capacitor, and a compensation transistor. The organic light-emitting diode includes first and second terminals. The driving transistor generates the driving current and includes a first terminal to which a first power supply voltage is applied, a second terminal connected to the first terminal of the organic light-emitting diode, and a gate terminal. The first dual gate transistor is connected between the gate terminal of the driving transistor and the second terminal of the driving transistor and includes first and second sub-transistors. The first capacitor includes a first electrode to which the first power supply voltage is applied, and a second electrode connected to a first node that connects the first and second sub-transistors to each other. The compensation transistor includes a terminal connected between the second electrode and the first node.Type: ApplicationFiled: May 11, 2022Publication date: March 2, 2023Inventors: HANBIT KIM, TAEWOOK KANG, DOO-NA KIM, SANGSUB KIM, YUNJUNG OH, DOKYEONG LEE, JAEHWAN CHU
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Publication number: 20220415255Abstract: A pixel includes a first capacitor connected between a first electrode and a second electrode connected to a first node, a first transistor including a gate electrode connected to the first node, a first electrode connected to a second node, and a second electrode connected to a third node, a second transistor including a gate electrode that receives a data write gate signal, a first electrode that receives a data voltage, and a second electrode connected to the second node, a third transistor connected between the first node and the third node, a fourth transistor connected between the first node and an initialization voltage input terminal to which an initialization voltage is applied, an eighth transistor t connected to the third transistor and the fourth transistor, and an organic light emitting diode including an anode and a cathode receiving a second power supply voltage.Type: ApplicationFiled: March 1, 2022Publication date: December 29, 2022Inventors: HANBIT KIM, MEEJAE KANG, KEUNWOO KIM, DOO-NA KIM, SANGSUB KIM, DOKYEONG LEE, JAEHWAN CHU
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Patent number: 11450133Abstract: An ultrasonic sensing device includes: a sensing layer between a driving electrode and a sensing electrode, a double-gated first transistor connected to a selection line and the sensing electrode, and may further include a sensed voltage storing capacitor having an electrode on the same layers as the first transistor. The configuration as a double gated transistor of a pixel sensor and the placement of one of the capacitor electrodes on the same layer can each reduce the size of the pixel sensor. The ultrasonic sensing device may be utilized as a proximity sensor or a fingerprint recognition sensor.Type: GrantFiled: March 19, 2020Date of Patent: September 20, 2022Assignee: Samsung Display Co., Ltd.Inventors: Keun Woo Kim, Doo Na Kim, Ji Yeong Shin, Yong Su Lee, Jae Hwan Chu, Ki Seok Choi
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Patent number: 11450722Abstract: A display device includes: a first semiconductor layer on a first buffer layer, and including a first active layer; a first gate insulating layer on the first semiconductor layer, and covering the first active layer; a first conductive layer on the first gate insulating layer, and including a first gate electrode; a second conductive layer on the first conductive layer, and including a first source/drain electrode; a first interlayer insulating layer on the first conductive layer; a second semiconductor layer on the first interlayer insulating layer, and including a second active layer; a second gate insulating layer on the second semiconductor layer, and covering the second active layer; and a third conductive layer on the second gate insulating layer, and including a second gate electrode and a second source/drain electrode. The first gate insulating layer and the second gate insulating layer include different insulating materials from each other.Type: GrantFiled: May 11, 2020Date of Patent: September 20, 2022Assignee: Samsung Display Co., Lid.Inventors: Doo Na Kim, Keun Woo Kim, Tae Wook Kang, Do Kyeong Lee, Yong Su Lee, Jae Hwan Chu, Kwang Hyun Kim, Yeoung Keol Woo, Yung Bin Chung
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Patent number: 11437455Abstract: A display device includes a pixel disposed in a display region. The pixel includes a light-emitting element connected between a first power source and a second power source; a first transistor connected between the first power source and the light-emitting element to control a driving current flowing in the light-emitting element in response to a voltage of a first node; and at least one switching transistor to transmit a data signal or a voltage of an initialization power source to the first node. The switching transistor includes a first channel region, a first conductive region and a second conductive region which are respectively disposed at opposite sides of the first channel region, and a first wide band-gap region disposed between the first channel region and the second conductive region.Type: GrantFiled: April 23, 2020Date of Patent: September 6, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Keun Woo Kim, Hye Na Kwak, Doo Na Kim, Sang Sub Kim, Thanh Tien Nguyen, Yong Su Lee, Jae Hwan Chu
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Patent number: 11410602Abstract: A display device includes a driving circuit that drives a pixel, and a display region including the pixel. The pixel includes a light emitting element electrically connected between a first power source and a second power source, a first transistor electrically connected between the first power source and the light emitting element to control a driving current, the first transistor including a first gate electrode electrically connected to a first node, and a second gate electrode electrically connected to a bias control line, and a switching transistor electrically connected between a data line and the first node, the switching transistor including a gate electrode electrically connected to a scan line. The driving circuit varies a control signal provided to the bias control line in a second period based on a first data signal provided to the data line during a first period.Type: GrantFiled: November 9, 2020Date of Patent: August 9, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Keun Woo Kim, Hye Na Kwak, Doo Na Kim, Han Bit Kim, Yong Su Lee
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Publication number: 20220180811Abstract: A pixel includes: a capacitor connected between a first voltage line and a first node; a light emitting diode including a first electrode connected to a second node, and a second electrode connected to a second voltage line; a first transistor; a second transistor; a third transistor including a first electrode connected to the first node, a second electrode connected to the second node, and a gate electrode to receive a first scan signal; a fourth transistor including a first electrode connected to the first node, a second electrode connected to a third voltage line to receive a third voltage, and a gate electrode to receive a second scan signal; and a compensation transistor including a first electrode connected to the first node, a second electrode connected to a fourth voltage line to receive a compensation voltage, and a gate electrode to receive a compensation control voltage.Type: ApplicationFiled: September 29, 2021Publication date: June 9, 2022Inventors: HANBIT KIM, MEEJAE KANG, KEUNWOO KIM, DOO-NA KIM, SANGSUB KIM, DO KYEONG LEE, JAEHWAN CHU
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Publication number: 20220139966Abstract: A display device includes a substrate, a semiconductor layer disposed on the substrate, and including a first channel portion, a second channel portion, a connecting portion disposed between the first channel portion and the second channel portion, and electrode regions, a first insulating layer disposed on the semiconductor layer, a gate conductor disposed on the first insulating layer and including a first gate electrode overlapping the first channel portion and a second gate electrode overlapping the second channel portion, signal lines disposed on the substrate, a first electrode electrically connected to at least one of electrode regions of the semiconductor layer, an emission layer disposed on the first electrode, and a second electrode disposed on the emission layer, and the first channel portion and the second channel portion of the semiconductor layer each have a first width greater than a second width of the connecting portion.Type: ApplicationFiled: July 28, 2021Publication date: May 5, 2022Inventors: Han Bit KIM, Mee Jae KANG, Keun Woo KIM, Doo-Na KIM, Sang Sub KIM, Do Kyeong LEE, Jae Hwan CHU
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Patent number: 11309373Abstract: A display device includes: a pixel at a display region. The pixel includes: a light-emitting element connected between a first power source and a second power source; and a first transistor connected between the first power source and the light-emitting element, the first transistor to control a driving current of the light-emitting element in response to a voltage of a first node. The first transistor includes a first driving transistor and a second driving transistor that are connected in series with each other between the first power source and the light-emitting element, and the first driving transistor and the second driving transistor have structures that are asymmetric with each other in a cross-sectional view.Type: GrantFiled: April 2, 2020Date of Patent: April 19, 2022Assignee: Samsung Display Co., Ltd.Inventors: Keun Woo Kim, Yong Su Lee, Myoung Geun Cha, Doo Na Kim, Sang Sub Kim, Jae Hwan Chu, Sang Gun Choi
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Publication number: 20210391401Abstract: A display device includes a pixel including a pixel driving transistor and a pixel switching transistor, the pixel driving transistor including a first active layer including a first channel area having a first length, a first gate insulating layer on the first active layer, a first gate electrode on the first gate insulating layer, a first source electrode and a first drain electrode above the first gate electrode, the pixel switching transistor including a second active layer including a second channel area having a second length that is shorter than the first length, a second gate insulating layer on the second active layer, a second gate electrode on the second gate insulating layer, a second source and a second drain electrode above the second gate electrode, and wherein the pixel driving transistor and the pixel switching transistor each include a P-MOS transistor.Type: ApplicationFiled: April 29, 2021Publication date: December 16, 2021Inventors: KEUNWOO KIM, DOO-NA KIM, MEEJAE KANG, THANH TIEN NGUYEN
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Patent number: 11195444Abstract: A display device includes: a pixel unit including a plurality of pixels; a scan driver having a plurality of stages and configured to supply a scan signal to the pixel unit; and a light emission control driver having a plurality of stages and configured to supply a light emission control signal to the pixel unit, wherein a first transistor of a plurality of transistors included in at least one of the stages of the scan driver or the stages of the light emission control driver comprises: an active layer pattern on a base layer, and including a channel region forming a channel, and first and second regions on opposite sides of the channel region; and a gate electrode spaced apart from the active layer pattern with a first insulating film therebetween, and overlapping the channel region.Type: GrantFiled: September 30, 2020Date of Patent: December 7, 2021Assignee: Samsung Display Co., Ltd.Inventors: Keun Woo Kim, Tae Wook Kang, Hye Na Kwak, Doo Na Kim, Han Bit Kim, Bum Mo Sung, Do Kyeong Lee, Yong Su Lee, Jae Hwan Chu