Patents by Inventor Chul Chai
Chul Chai 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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Patent number: 12374672Abstract: A display device includes a substrate. A first electrode, a second electrode, and a third electrode are on the substrate, and are sequentially arranged along a first direction. A first light emitting element is located between the first electrode and the second electrode. A second light emitting element is located between the second electrode and the third electrode. A first contact electrode overlaps the first electrode and one end of the first light emitting element, and is in contact with the first electrode and the one end of the first light emitting element. A second contact electrode overlaps and is in contact with the other end of the first light emitting element. A third contact electrode overlaps and is in contact with the second electrode and the other end of the second light emitting element. The second contact electrode extends while detouring the third contact electrode.Type: GrantFiled: July 11, 2022Date of Patent: July 29, 2025Assignee: Samsung Display Co., Ltd.Inventors: Min Kyu Woo, Kyung Bae Kim, Jin Yeong Kim, Chong Chul Chai
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Patent number: 12349526Abstract: A display device includes: a substrate including first areas and second areas alternately arranged in a first direction in a plane view; a first electrode and a second electrode on the substrate and spaced apart from each other in a second direction crossing the first direction; a first insulation layer on the substrate and covering the first electrode and the second electrode; and a light emitting element on the first insulation layer and electrically connected to the first electrode and the second electrode, the first insulation layer having a first thickness in the first area and a second thickness thicker than the first thickness in the second area, and the light emitting element being located in the first area.Type: GrantFiled: March 3, 2023Date of Patent: July 1, 2025Assignee: Samsung Display Co., Ltd.Inventors: Kyung Bae Kim, Ji Eun Lee, Chong Chul Chai
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Patent number: 12294014Abstract: A light emitting device comprises: a substrate; a first electrode on the substrate, the first electrode having holes, and having inclined surfaces along the peripheries of the holes; second electrodes on the substrate, each of which is in a respective one of the holes of the first electrode; and light emitting elements between the first electrode and the second electrodes, the light-emitting elements being electrically connected to the first electrode and the second electrodes.Type: GrantFiled: June 11, 2019Date of Patent: May 6, 2025Assignee: Samsung Display Co., Ltd.Inventors: Chong Chul Chai, Hyun Joon Kim, Hyun Min Cho, Kyung Bae Kim, Min Jae Jeong
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Patent number: 12261254Abstract: A display device includes: a base layer; a pixel circuit layer on the base layer; and a display element layer on the pixel circuit layer. The pixel circuit layer includes a lens pattern at a recess between the display element layer and the base layer, the display element layer includes a light emitting element, and at least a portion of the light emitting element overlaps with the lens pattern.Type: GrantFiled: January 14, 2020Date of Patent: March 25, 2025Assignee: Samsung Display Co., Ltd.Inventors: Ji Hye Lee, Kyung Bae Kim, Yu Jin Lee, Chong Chul Chai
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Patent number: 12223888Abstract: A display device includes a light-emitting diode including a first conductivity-type semiconductor, an active layer, and a second conductivity-type semiconductor; a first voltage line to which a first voltage is applied; a second voltage line to which a second voltage is applied; a first transistor including a source electrode electrically connected to the first voltage line and a drain electrode electrically connected to a first electrode of the light-emitting diode and to the first conductivity-type semiconductor; a second transistor including a drain electrode electrically connected to a gate electrode of the first transistor and a source electrode electrically connected to a data line to apply a data signal; a capacitor electrically connected to the gate electrode of the first transistor and the first electrode; and a third transistor including a source electrode electrically connected to the second voltage line and a drain electrode electrically connected to the first electrode.Type: GrantFiled: November 13, 2023Date of Patent: February 11, 2025Assignee: Samsung Display Co., Ltd.Inventors: Min Jae Jeong, Kyung Bae Kim, Chong Chul Chai, Kyung Hoon Chung
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Patent number: 12217686Abstract: A pixel includes a plurality of transistors, a storage capacitor, and an organic light emitting diode. A first transistor controls the amount of current from a first driving power source to the organic light emitting diode based on a data voltage. A second transistor is connected to a data line and is turned on based on a scan signal. A third transistor coupled to the first transistor and is turned on based on the scan signal. A first stabilizing transistor is coupled to the third transistor or between the first and third transistors and is turned off when the third transistor is turned off.Type: GrantFiled: September 25, 2023Date of Patent: February 4, 2025Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Chong Chul Chai, Dong Woo Kim, Kyoung Ju Shin, Bo Yong Chung
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Publication number: 20240428739Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.Type: ApplicationFiled: September 9, 2024Publication date: December 26, 2024Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
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Patent number: 12100699Abstract: A display device includes a first electrode extended in a first direction, a second electrode spaced apart from the first electrode in a second direction and extended in the first direction, a first insulating layer on the first and second electrodes, light-emitting elements on the first insulating layer, each having at least an end disposed on the first electrode or the second electrode, a second insulating layer disposed on the light-emitting elements and extended in the first direction, and a first connection electrode disposed on the first electrode and electrically contacting the light-emitting elements, a second connection electrode disposed on the second electrode and electrically contacting the light-emitting elements. Each of the first and second connection electrodes includes a main portion electrically contacting the light-emitting elements, and a subsidiary portion having a width smaller than a width of the main portion and electrically connected to the main portion.Type: GrantFiled: September 16, 2021Date of Patent: September 24, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kyung Bae Kim, No Kyung Park, Chong Chul Chai, Do Yeong Park
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Patent number: 12095009Abstract: A display device may include a pixel. The pixel may include: an emission area, a non-emission area, and a split area spaced from the emission area with the non-emission area interposed therebetween; a first pattern and a second pattern spaced from each other in a first direction, and each extending in a second direction; a first light emitting element aligned between the first and second patterns; a first electrode connected to a first end of the first light emitting element; a second electrode connected to a second end of the first light emitting element; a bank located in the non-emission area and defining the emission area and the split area; and an insulating pattern located between the first and second electrodes and overlapping the first light emitting element. Only two of the first pattern, the bank, and the insulating pattern may overlap each other.Type: GrantFiled: September 20, 2021Date of Patent: September 17, 2024Assignee: Samsung Display Co., Ltd.Inventors: Do Yeong Park, No Kyung Park, Chong Chul Chai
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Patent number: 12087228Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.Type: GrantFiled: March 20, 2023Date of Patent: September 10, 2024Assignees: Samsung Display Co., Ltd., Industry-University Cooperation Foundation Hanyang UniversityInventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
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Publication number: 20240260441Abstract: A display apparatus includes a base substrate including a display region and a peripheral region that is a non-display region surrounding the display region, a plurality of data lines disposed in the display region on the base substrate and extending to the peripheral region, a bypass data line disposed in the display region and the peripheral region on the base substrate and electrically connected to at least one of the data lines, and a dummy pattern spaced apart from the bypass data line and disposed on a same layer as the bypass data line.Type: ApplicationFiled: April 8, 2024Publication date: August 1, 2024Inventors: Min-Jae JEONG, Jae-Yong JANG, Gyung-Soon PARK, Kyung-Hoon CHUNG, Chong-Chul CHAI
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Patent number: 12035592Abstract: A display device includes a first pixel including a first transistor, a second transistor, and a third transistor, a second pixel disposed adjacent to the first pixel in a first direction, and including a first transistor, a second transistor, and a third transistor, and an initialization voltage line disposed between the first pixel and the second pixel, and extending in a second direction crossing the first direction. The second transistor of the first pixel and the second transistor of the second pixel are connected to the initialization voltage line. The first, second, and third transistors of the first pixel and the first, second, and third transistors of the second pixel are symmetrical with respect to the initialization voltage line.Type: GrantFiled: July 14, 2022Date of Patent: July 9, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kang Moon Jo, Young Wan Seo, Chong Chul Chai
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Publication number: 20240194146Abstract: A scan signal driver includes: stages to sequentially output scan signals in an active period, and to selectively output sensing signals in a vertical blank period. At least one of the stages includes: a sensing control circuit to supply a gate-on voltage to a sensing control node in response to a holding control signal during the active period, and to output the gate-on voltage of the sensing control node in response to a selectively input line select signal during the vertical blank period; an output node control circuit to supply the gate-on voltage to a pull-up node when the gate-on voltage of the sensing control node is output during the vertical blank period; and an output circuit to output a scan clock signal as a sensing signal to one of scan signal lines when the gate-on voltage is supplied to the pull-up node during the vertical blank period.Type: ApplicationFiled: July 5, 2023Publication date: June 13, 2024Inventors: Dong Woo KIM, Kee Chan PARK, Yi Kyoung YOU, Chong Chul CHAI, Kyung Ho KIM, Joon Ho LEE
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Patent number: 12008932Abstract: A display device comprises a display area and a first non-display area located on a side of the display area in a first direction, a first bus pattern disposed in the first non-display area, a second bus pattern disposed in the first non-display area and spaced apart from the first bus pattern in a second direction intersecting the first direction, first voltage lines disposed in the display area, extending in the first direction, and electrically connected to the first bus pattern, second voltage lines disposed in the display area, extending in the first direction, and electrically connected to the second bus pattern, and a first test pad disposed in the first non-display area and disposed between the first bus pattern and the second bus pattern.Type: GrantFiled: December 12, 2022Date of Patent: June 11, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Do Yeong Park, Chong Chul Chai
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Patent number: 11990579Abstract: A display device includes a substrate and pixels. The substrate includes: a display area including pixel areas, each including a first area and a second area; and a non-display area enclosing at least one side of the display area. The pixels are disposed on the pixel areas, each pixel including light emitting elements. Each pixel further includes: a pixel circuit part disposed on the first area and including at least one transistor and at least one capacitor; and a display element part disposed on the second area and including an emission area to emit light. Each of the pixel circuit part and the display element part has a multi-layer structure including one or more conductive layers and one or more insulating layers. At least one layer of the pixel circuit part and at least one layer of the display element part are disposed in a same layer.Type: GrantFiled: December 23, 2022Date of Patent: May 21, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kyung Bae Kim, Mee Hye Jung, Chong Chul Chai
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Patent number: 11957034Abstract: A display apparatus includes a base substrate including a display region and a peripheral region that is a non-display region surrounding the display region, a plurality of data lines disposed in the display region on the base substrate and extending to the peripheral region, a bypass data line disposed in the display region and the peripheral region on the base substrate and electrically connected to at least one of the data lines, and a dummy pattern spaced apart from the bypass data line and disposed on a same layer as the bypass data line.Type: GrantFiled: September 24, 2019Date of Patent: April 9, 2024Assignee: Samsung Display Co., Ltd.Inventors: Min-Jae Jeong, Jae-Yong Jang, Gyung-Soon Park, Kyung-Hoon Chung, Chong-Chul Chai
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Publication number: 20240087507Abstract: A display device includes a light-emitting diode including a first conductivity-type semiconductor, an active layer, and a second conductivity-type semiconductor; a first voltage line to which a first voltage is applied; a second voltage line to which a second voltage is applied; a first transistor including a source electrode electrically connected to the first voltage line and a drain electrode electrically connected to a first electrode of the light-emitting diode and to the first conductivity-type semiconductor; a second transistor including a drain electrode electrically connected to a gate electrode of the first transistor and a source electrode electrically connected to a data line to apply a data signal; a capacitor electrically connected to the gate electrode of the first transistor and the first electrode; and a third transistor including a source electrode electrically connected to the second voltage line and a drain electrode electrically connected to the first electrode.Type: ApplicationFiled: November 13, 2023Publication date: March 14, 2024Inventors: Min Jae JEONG, Kyung Bae KIM, Chong Chul CHAI, Kyung Hoon CHUNG
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Patent number: 11908845Abstract: A display device includes: a base layer having a first area and a second area extending at least partially around a periphery of the first area; conductive patterns in the second area; an insulating layer over the conductive patterns in the second area; a first electrode and a second electrode on the insulating layer; and a plurality of light emitting elements between the first electrode and the second electrode in the first area and being connected to the first electrode and the second electrode. The first electrode and the second electrode are spaced apart from each other in the first area and are respectively connected to portions of the conductive patterns through contact openings penetrating the insulating layer. The light emitting elements do not overlap the conductive patterns and the insulating layer.Type: GrantFiled: August 26, 2020Date of Patent: February 20, 2024Assignee: Samsung Display Co., Ltd.Inventors: Min Kyu Woo, Kyung Bae Kim, Chong Chul Chai
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Patent number: 11893920Abstract: A display device includes a display panel including pixels in a display area, scan lines disposed in the display area and electrically connected to the pixels, a gate driving circuit disposed in the display area and electrically connected to the scan lines, and clock lines disposed in the display area and electrically connected to the gate driving circuit. The gate driving circuit includes stage blocks adjacent to each other and outputting a scan signal in response to a clock signal provided through a corresponding clock line among the clock lines, and a scan signal output from a stage block among the stage blocks is supplied to scan lines of another stage block among the stage blocks.Type: GrantFiled: June 7, 2022Date of Patent: February 6, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Na Hyeon Cha, Sun Kwun Son, Dong Hee Shin, Chong Chul Chai
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Patent number: RE50012Abstract: An organic light-emitting diode display is disclosed. In one aspect, the display includes a plurality of pixels formed in a plurality of intersection areas of a plurality of data lines and a plurality of scan lines. Each of the pixels includes a storage capacitor configured to store a data voltage, at least one target transistor having one end electrically connected to a current path of the storage capacitor, an organic light emitting layer, and a first electrode of an OLED formed over the organic light emitting layer. The first electrode includes a first electrode extension configured to block at least a portion of the target transistor from light.Type: GrantFiled: April 5, 2022Date of Patent: June 11, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hee Rim Song, Mu Kyung Jeon, Chong Chul Chai