Patents by Inventor Jae Hwan Chu
Jae Hwan Chu 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).
-
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
-
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
-
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
-
Publication number: 20230065849Abstract: A display device is disclosed that includes a substrate, a semiconductor layer, a first conductive layer, and a first gate insulating layer. The semiconductor layer is disposed on the substrate and includes a first area and a second area. The first conductive layer is disposed on the semiconductor layer and includes a first gate pattern overlapping the first area and a second gate pattern overlapping the second area. The first gate insulating layer is disposed between the semiconductor layer and the first conductive layer and includes a first insulating layer overlapping the first area and the second area, a second insulating layer overlapping the first area and the second area, and a third insulating layer not overlapping the first area but overlapping the second area. The second insulating layer is disposed between the first insulating layer and the third insulating layer, and has a dielectric constant greater than that of the third insulating layer.Type: ApplicationFiled: March 23, 2022Publication date: March 2, 2023Inventors: Sung Won CHO, Yun Jong YEO, Yu Gwang JEONG, Jae Hwan CHU
-
Publication number: 20230025912Abstract: A display device including: a display area including a plurality of pixels; and a peripheral area disposed around the display area to include a driving signal transmission line, each of the pixels may include a transistor, a driving voltage line connected to the transistor and the driving signal transmission line, and a light emitting unit connected to the transistor, the pixels may include a first pixel and a second pixel spaced apart from the driving signal transmission line to have different distances from each other, and a concentration of impurities doped in a semiconductor layer of the transistor of the first pixel may be different from a concentration of impurities doped in a semiconductor layer of the transistor of the second pixel.Type: ApplicationFiled: July 21, 2022Publication date: January 26, 2023Inventors: Joon Woo BAE, Keun Woo Kim, Jae Hwan CHU, Sang Gun CHOI
-
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
-
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
-
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
-
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
-
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
-
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
-
Publication number: 20210304672Abstract: 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: ApplicationFiled: January 5, 2021Publication date: September 30, 2021Inventors: Keun Woo KIM, Tae Wook KANG, Doo Na KIM, Han Bit KIM, Jae Seob LEE, Jae Hwan CHU
-
Publication number: 20210150960Abstract: 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: ApplicationFiled: September 30, 2020Publication date: May 20, 2021Inventors: 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
-
Publication number: 20210074785Abstract: 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: ApplicationFiled: May 11, 2020Publication date: March 11, 2021Inventors: 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
-
Publication number: 20210057502Abstract: A display device includes pixels at least one of which 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 and controlling a driving current flowing through the light emitting element in response to a voltage of a first node, a switching transistor connected to the first node and including and active layer that includes first and second conductive regions spaced apart from each other, first and second channel regions disposed between the first and second conductive regions, and a common conductive region disposed between the first and second channel regions, and a conductive pattern overlapping the active layer to face the common conductive region.Type: ApplicationFiled: April 24, 2020Publication date: February 25, 2021Applicant: Samsung Display Co., LTD.Inventors: Keun Woo KIM, Sang Sub KIM, Hye Na KWAK, Doo Na KIM, Thanh Tien NGUYEN, Yong Su LEE, Jae Hwan CHU
-
Publication number: 20210057458Abstract: A display device includes: a plurality of pixels connected to gate lines and data lines; a gate driver to supply a gate signal to the gate lines; and a data driver to supply a data signal to the data lines. The gate driver includes: a first transistor including a first active layer at a first layer; and a second transistor including a second active layer at a second layer on the first layer.Type: ApplicationFiled: April 15, 2020Publication date: February 25, 2021Inventors: Keun Woo KIM, Mee Jae KANG, Doo Na KIM, Yun Jung OH, Yong Su LEE, Jae Hwan CHU
-
Publication number: 20210036080Abstract: 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: ApplicationFiled: April 23, 2020Publication date: February 4, 2021Applicant: 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
-
Publication number: 20210036079Abstract: 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: ApplicationFiled: April 2, 2020Publication date: February 4, 2021Inventors: Keun Woo KIM, Yong Su LEE, Myoung Geun CHA, Doo Na KIM, Sang Sub KIM, Jae Hwan CHU, Sang Gun CHOI
-
Publication number: 20200410192Abstract: An ultrasonic sensing device includes: a sensing layer between a driving electrode and a sensing electrode, wherein the sensing layer is configured to generate an electrical signal according to an ultrasound; and a first transistor comprising a first gate electrode connected to a selection line and a second gate electrode connected to the sensing electrode.Type: ApplicationFiled: March 19, 2020Publication date: December 31, 2020Inventors: Keun Woo KIM, Doo Na KIM, Ji Yeong SHIN, Yong Su LEE, Jae Hwan CHU, Ki Seok CHOI
-
Patent number: 9385281Abstract: The present invention relates to a graphene sheet and a transparent electrode, and an active layer including the same, and a display device, an electronic device, an optoelectronic device, a battery, a solar cell, and a dye-sensitized solar cell including these. The graphene sheet includes a lower sheet including 1 to 20 graphene layers, and a ridge formed on the lower sheet and including more graphene layers. The ridge has a metal grain boundary shape.Type: GrantFiled: January 21, 2014Date of Patent: July 5, 2016Assignee: UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)Inventors: Soon-Yong Kwon, Sung Youb Kim, Ki bog Park, Jin Sung Kwak, Jae Hwan Chu, Jae Kyung Choi