Patents by Inventor Ji-Hyun Ka
Ji-Hyun Ka 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: 20240282247Abstract: A light emitting display device includes multiple pixels arranged in multiple pixel rows, a first scan signal generator that provides a first scan signal to the pixels in the pixel rows, a second scan signal generator that provides a second scan signal to the pixels in the pixel rows, a third scan signal generator that provides a third scan signal to the pixels in the pixel rows, and a light emission signal generator that provides a light emission signal to the pixels in the pixel rows. Each of the second scan signal generator, the third scan signal generator, and the light emission signal generator provides a same signal to the pixels in two of the pixel rows.Type: ApplicationFiled: February 8, 2024Publication date: August 22, 2024Applicant: Samsung Display Co., LTD.Inventors: Soon-Gi KWON, Min Woo BYUN, Ji-Hyun KA, MINJOO KIM, Seon I JEONG, Chae Han HYUN, SUNGCHAN HWANG
-
Patent number: 12069914Abstract: An organic light emitting diode display includes a substrate, a semiconductor layer on the substrate, the semiconductor layer including a doped area and an undoped area, a first insulation layer that covers the semiconductor layer, a first conductor on the first insulation layer, a second insulation layer that covers the first conductor, a second conductor on the second insulation layer, a third insulation layer that covers the second conductor, and a third conductor on the third insulation layer, wherein, in the semiconductor layer that overlaps the first conductor, the doped area is between undoped areas.Type: GrantFiled: November 22, 2021Date of Patent: August 20, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sung Hwan Kim, Won Kyu Kwak, Sang Moo Choi, Ji-Hyun Ka, Chul Kyu Kang, Dong Wook Kim, Won Se Lee
-
Patent number: 12052802Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.Type: GrantFiled: July 3, 2023Date of Patent: July 30, 2024Assignee: Samsung Display Co., Ltd.Inventors: Ji-Hyun Ka, Won-Kyu Kwak
-
Patent number: 12039939Abstract: An emission driver includes a plurality of stages. A stage of the plurality of stages receives a start signal, a first clock signal, a second clock signal, a protection signal, a first gate power voltage and a second gate power voltage and outputs an emission signal. The stage of the plurality of stages includes a pull-up switching element connected between a first gate power voltage terminal which receives the first gate power voltage and an emission signal output terminal which outputs the emission signal, a pull-down switching element connected between a second gate power voltage terminal which receives the second gate power voltage and the emission signal output terminal and a protection switching element which applies the first gate power voltage to a control electrode of the pull-down switching element in response to the protection signal.Type: GrantFiled: February 17, 2023Date of Patent: July 16, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hai-Jung In, Kimyeong Eom, Ji-Hyun Ka
-
Publication number: 20240233605Abstract: A display device including pixels coupled to first scan lines, second scan lines, emission control lines, and data lines; a first scan driver to supply a scan signal to each of the first scan lines at a first frequency to drive the display device at a first driving frequency, and to supply the scan signal to each of the first scan lines at a second frequency to drive the display device at a second driving frequency lower than the first driving frequency; a second scan driver to supply a scan signal to each of the second scan lines at the first frequency to drive the display device at the first driving frequency, and to supply the scan signal to each of the second scan lines at the second frequency to drive the display device at the second driving frequency; an emission driver to supply an emission control signal to each of the emission control lines at the first frequency; and a data driver to supply a data signal to each of the data lines in response to the scan signal supplied to each of the first scan lineType: ApplicationFiled: January 21, 2024Publication date: July 11, 2024Inventors: Kyong Hwan OH, Ji Hyun KA, Ki Myeong EOM, Hai Jung IN, Jin JEON, Won Kyu KWAK, Hyun LEE, Hwan Soo JANG, Jin Tae JEONG
-
Publication number: 20240221592Abstract: A display device includes: a first pixel connected to a first data line and a first scan line; a second pixel connected to the first data line and a second scan line; a first scan driver connected to a first scan start line and the first scan line; and a second scan driver connected to a second scan start line and the second scan line. In a first frame period, the second scan start line is to be suppled with a second scan start signal having a turn-on level, after a first period elapses after a first scan start signal having a turn-on level is supplied to the first scan start line. In a second frame period, a difference between a time at which the first scan start signal having the turn-on level is supplied and a time at which the second scan start signal having the turn-on level is supplied corresponds to a second period. The second period is shorter than the first period.Type: ApplicationFiled: March 18, 2024Publication date: July 4, 2024Inventors: Ji Hyun KA, Ki Myeong EOM, Kyong Hwan OH, Hai Jung IN
-
Publication number: 20240224771Abstract: A display device includes a pixel electrode; a pixel circuit connected to the pixel electrode; a repair line overlapping at least a part of the pixel circuit; and a shielding line overlapping at least a part of the repair line and connected to a constant power source.Type: ApplicationFiled: August 23, 2023Publication date: July 4, 2024Inventors: Su Jin KIM, Ji Hyun KA, Sung Chan HWANG, Chul Kyu KANG, Dong Hyun KIM, Min Joo KIM, Seon Kyoon MOK
-
Patent number: 12029082Abstract: A display device includes: a base layer comprising a first portion, a second portion extending from the first portion, and a third portion extending from the second portion; a first light emitting element disposed on the first portion; a first front signal line electrically connected to the first light emitting element and disposed on the first portion; a second front signal line electrically connected to the first front signal line, disposed on the first portion, disposed in a different layer from the first front signal line, and overlapping the first front signal line; a first connection line electrically connected to the first and second front signal lines, disposed on the second portion, and disposed in a different layer from the first and second front signal lines; and a first rear signal line electrically connected to the first connection line and disposed on the third portion.Type: GrantFiled: November 5, 2020Date of Patent: July 2, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ji-Hyun Ka, Taehoon Kwon, Ji-Eun Lee, Minhee Choi
-
Publication number: 20240203355Abstract: A pixel includes an organic light emitting diode (OLED), a pixel circuit, and first and second transistors. The OLD includes a cathode electrode connected to a second power source. The pixel circuit includes a driving transistor having a gate electrode initialized by a third power source. The driving transistor controls the amount of current flowing from a first power source to the second power source via the OLED. The first transistor is connected between a fourth power source and the second power source and an anode electrode of the OLED. The first transistor is turned on based on a scan signal is supplied to a scan line. The second transistor is connected between a data line and the pixel circuit. The second transistor is turned on when the scan signal is supplied to the ith scan line.Type: ApplicationFiled: February 29, 2024Publication date: June 20, 2024Inventors: JIN TAE JEONG, MIN KU LEE, JI HYUN KA, TAE HOON KWON, SEUNG KYU LEE, SEUNG JI CHA
-
Publication number: 20240203356Abstract: A display device includes: a first pixel including a first organic light emitting diode; an initialization voltage generator for generating a first initialization voltage to be supplied to an anode of the first organic light emitting diode; and a timing controller including a first lookup table in which a plurality of first initialization voltage values corresponding to a plurality of maximum luminances are recorded, the timing controller being configured to determine a value of the first initialization voltage, based on reception information on a target maximum luminance and the first lookup table.Type: ApplicationFiled: March 4, 2024Publication date: June 20, 2024Inventors: Ji Hyun KA, Seung Ji CHA, Mi Hae KIM, Ki Myeong EOM
-
Patent number: 12010873Abstract: A pixel includes a pixel circuit and an organic light emitting diode. The pixel circuit has first, second, third, and fourth transistors. The first transistor controls an amount of current flowing from a first driving power supply coupled to a first node to a second driving power supply through the organic light emitting diode. The turns on when a scan signal is supplied to a first scan line. The third transistor turns on when a scan signal is supplied to a second scan line. The fourth transistor turns on when a scan signal is supplied to a third scan line. The first transistor is a p-type Low Temperature Poly-Silicon thin film transistor and the third transistor and the fourth transistor are n-type oxide semiconductor thin film transistors.Type: GrantFiled: October 17, 2022Date of Patent: June 11, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ji Hyun Ka, Han Sung Bae, Won Kyu Kwak
-
Patent number: 12004397Abstract: A display apparatus includes a substrate including a display area, a peripheral area surrounding the display area, a function-adding area, of which at least a portion is surrounded by the display area, and a detour area disposed between the display area and the function-adding area. The display apparatus includes a plurality of pixel circuits disposed in the display area. A plurality of driving lines are electrically connected to the pixel circuits and extend in a direction in the display area. A first detour line is disposed in the detour area and is electrically connected to a first driving line. A second detour line is disposed in the detour area. The second detour line is electrically connected to a second driving line and is disposed in a different layer from the first detour line.Type: GrantFiled: April 14, 2023Date of Patent: June 4, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ji-Hyun Ka, Seung-Kyu Lee, Hwan-Soo Jang, Jin-Tae Jeong
-
Patent number: 11996041Abstract: A pixel includes a plurality of transistors and an organic light emitting diode, in which the transistors include a first transistor to control an amount of current flowing to the organic light emitting diode and additional transistors are connected to the first transistor or the organic light emitting diode, the first transistor is a Low Temperature Poly-Silicon (LTPS) thin film transistor, and one or more of the other transistors are oxide semiconductor transistors.Type: GrantFiled: August 30, 2021Date of Patent: May 28, 2024Assignee: Samsung Display Co., Ltd.Inventors: Ji Hyun Ka, Won Kyu Kwak, Han Sung Bae
-
Patent number: 11996051Abstract: A display panel of an OLED display device includes a first pixel configured to emit first color light, a second pixel configured to emit second color light, and a third pixel configured to emit third color light. Each of the first, second and third pixels includes at least two transistors, at least one capacitor and an organic light emitting diode. At least one of at least two transistors or at least one capacitor included in the third pixel has a size different from a size of a corresponding one at least two transistors or at least one capacitor included in the first pixel or the second pixel.Type: GrantFiled: February 6, 2023Date of Patent: May 28, 2024Assignee: Samsung Display Co., Ltd.Inventors: Ji-Hyun Ka, Nackhyeon Keum, Kimyeong Eom
-
Publication number: 20240169871Abstract: A display device includes a substrate including a display area and a non-display area disposed near the display area, a plurality of pixels disposed in the display area, a plurality of signal lines disposed on the substrate and connected to the pixels, and a pad portion disposed in the non-display area and including a plurality of pads. The signal lines include a first crack detecting line connected to a first test voltage pad and a first pad at a first node, connected to a second pad at a second node, and extending around the non-display area between the first node and the second node, as well as a first data line including a first end connected to a first transistor connected to the first crack detecting line at the second node, and a second end connected to corresponding pixels from among the plurality of pixels.Type: ApplicationFiled: January 22, 2024Publication date: May 23, 2024Applicant: Samsung Display Co., LTD.Inventors: Kwang Sae LEE, Ji-Hyun KA, Won Kyu KWAK, Hwa Young SONG, Ki Myeong EOM
-
Patent number: 11984083Abstract: A gate driver includes a stage configured to output a gate signal, the stage including an input part configured to control a voltage of a first node and a voltage of a second node based on signals supplied to a first input terminal and a second input terminal, an output part configured to supply a voltage of a first power source or a voltage of a second power source as the gate signal to an output terminal based on a voltage of a third node and a voltage of a fourth node, a first signal processing part configured to supply the voltage of the second power source to the fourth node based on the voltage of the first node, or to electrically connect the second node and the fourth node through a fifth node based on a signal supplied to a third input terminal, and a second signal processing part including a first transistor connected between the third node and a sixth node to control the voltage of the third node based on an operation of the first transistor.Type: GrantFiled: April 30, 2021Date of Patent: May 14, 2024Assignee: Samsung Display Co., Ltd.Inventors: Hai Jung In, Ji Hyun Ka, Tae Hoon Kwon, Ki Myeong Eom, Chae Han Hyun
-
Publication number: 20240153459Abstract: A display device includes a display panel including a pixel and a sensor pixel, the pixel including a light emitting element and a driving transistor controlling a current flowing through the light emitting element, the sensor pixel including sensor transistors, a data driver that supplies a data signal to the pixel through a data line and provides a sensor data signal to the sensor pixel through a sensor data line, and a sensing driver that obtains sensing information on a current flowing through the sensor pixel. The sensor transistors are electrically connected in parallel to each other and are commonly electrically connected to the sensor data line. The sensor transistors and the driving transistor include a substantially same characteristic.Type: ApplicationFiled: November 2, 2023Publication date: May 9, 2024Applicant: Samsung Display Co., LTD.Inventors: Byung Ki CHUN, Ji Hyun KA, Min Seok BAE, Chang Bin IM, Chae Han HYUN
-
Patent number: 11971618Abstract: A display device includes a substrate including a first pixel area and a second pixel area, a display panel disposed on the substrate and including a first light-emitting diode emitting a first light having a first color and overlapping the first pixel area and a second light-emitting diode emitting a second light having the first color and overlapping the second pixel area, a first pixel electrode which is disposed on the display panel and overlaps the first pixel area, and in which first slits are defined, a second pixel electrode which is disposed on the display panel, is spaced apart from the first pixel electrode, and overlaps the second pixel area, and in which second slits extending in a direction different from the first slits are defined, a common electrode layer and a liquid crystal layer disposed between the first and second pixel electrodes and the common electrode layer and including a plurality of liquid crystal molecules.Type: GrantFiled: April 1, 2023Date of Patent: April 30, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Huigyeong Yun, Ji-Hyun Ka
-
Patent number: 11961475Abstract: Provided is a display device including first pixels positioned in a first area of a panel for receiving a first data signal from a data line in response to a first scan signal supplied from a first scan line and having an emission time controlled according to a first emission control signal, and second pixel positioned in a second area of the panel for receiving a second data signal from the data line in response to a second scan signal supplied from a second scan line and having an emission time controlled by a second emission control signal. The first pixels receive the first data signal after a first time after the first emission control signal is supplied, and the second pixels receive the second data signal after a second time, which is different from the first time, after the second emission control signal is supplied.Type: GrantFiled: February 17, 2023Date of Patent: April 16, 2024Assignee: Samsung Display Co., Ltd.Inventors: Min Ku Lee, Ji Hyun Ka, Won Kyu Kwak
-
Patent number: 11950457Abstract: A display device includes a first display area including a plurality of first pixel electrodes, and a second display area including a plurality of second pixel electrodes. A first pitch in a first direction of the plurality of first pixel electrodes is smaller than a second pitch in the first direction of the plurality of second pixel electrodes, and a length in the first direction of the first pixel electrodes is smaller than a length in the first direction of the second pixel electrode.Type: GrantFiled: June 17, 2022Date of Patent: April 2, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ji-Hyun Ka, Tae Geun Kim, Gyeong-Im Lee