Electroluminescent Device Patents (Class 315/169.3)
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Patent number: 11963409Abstract: The present disclosure provides an array substrate and a display device. The array substrate includes: a sub-pixel, in a display region and including a light-emitting element, the light-emitting element including a first electrode, a light-emitting layer and a second electrode; a positive power line, connected to the first electrode; a positive power bus, connected to the positive power line; three positive power access ends, at a side of the positive power bus away from a display region, and respectively connected to the positive power bus; a negative power line; an auxiliary electrode, respectively connected to the negative power line and the second electrode; three negative power access ends, at the side of the positive power bus away from the display region, and respectively connected to the negative power line; and a negative power auxiliary line, respectively connected to the negative power access end and the auxiliary electrode.Type: GrantFiled: January 26, 2022Date of Patent: April 16, 2024Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Yao Huang, Weiyun Huang, Yue Long, Chao Zeng, Meng Li
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Patent number: 11955391Abstract: Methods and systems for estimating values of process parameters, structural parameters, or both, based on x-ray scatterometry measurements of high aspect ratio semiconductor structures are presented herein. X-ray scatterometry measurements are performed at one or more steps of a fabrication process flow. The measurements are performed quickly and with sufficient accuracy to enable yield improvement of an on-going semiconductor fabrication process flow. Process corrections are determined based on the measured values of parameters of interest and the corrections are communicated to the process tool to change one or more process control parameters of the process tool. In some examples, measurements are performed while the wafer is being processed to control the on-going fabrication process step. In some examples, X-ray scatterometry measurements are performed after a particular process step and process control parameters are updated for processing of future devices.Type: GrantFiled: September 7, 2021Date of Patent: April 9, 2024Assignee: KLA-Tencor CorporationInventors: Antonio Arion Gellineau, Thaddeus Gerard Dziura
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Patent number: 11955088Abstract: A display substrate includes a base substrate, multiple sub-pixels, multiple first gate drive circuits, and at least one auxiliary structure. The base substrate includes a display region and a peripheral region located at a periphery of the display region. The multiple sub-pixels are located in the display region. The multiple first gate drive circuits and the at least one auxiliary structure are located in the peripheral region. The multiple first gate drive circuits are configured to provide first gate drive signals to the multiple sub-pixels. One auxiliary structure is disposed between adjacent first gate drive circuits.Type: GrantFiled: December 21, 2022Date of Patent: April 9, 2024Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.Inventors: Lu Bai, Yang Zhou, Yi Qu, Chang Luo, Huijuan Yang, Yi Zhang, Junxiu Dai
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Patent number: 11948484Abstract: An electronic device with a rollable display may include the operations of: obtaining global burn-in information and local burn-in information according to a designated sampling period; on the basis of the result of analyzing the global burn-in information, predicting whether burn-in will at least partially occur in the entire area of a display area; when burn-in is predicted to at least partially occur in a boundary area, generating a first compensation map including pieces of local compensation data calculated to correspond to m block areas of the boundary area, respectively; when burn-in is predicted to at least partially occur in an area remaining after excluding the boundary area from the entire area, generating a second compensation map including pieces of global compensation data calculated to correspond to n block areas of the entire area, respectively; and controlling the rollable display to display image data compensated on the basis of the first compensation map or the second compensation map.Type: GrantFiled: June 2, 2023Date of Patent: April 2, 2024Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seungkyu Choi, Hanyuool Kim, Taehyeong Kim, Yunpyo Hong
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Patent number: 11948507Abstract: A pixel circuitry, a method for driving the pixel circuitry, and a display device are provided. The pixel circuitry includes a driving circuit, a first switching circuit, a second switching circuit and a light-emitting element. The driving circuit includes a first transistor and a storage capacitor. A control end of the first transistor is electrically connected to the first switching circuit, a first end of the first transistor is electrically connected to a first voltage end, a second end of the first transistor is electrically connected to an anode of the light-emitting element, a third end of the first transistor is electrically connected to the second switching circuit, a first end of the storage capacitor is electrically connected to the first voltage end, and a second end of the storage capacitor is electrically connected to the control end of the first transistor.Type: GrantFiled: January 26, 2021Date of Patent: April 2, 2024Assignee: BOE Technology Group Co., Ltd.Inventors: Xinshe Yin, Tian Dong
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Patent number: 11922866Abstract: A pixel includes: a first transistor including a gate electrode electrically connected to a first node, a second node to which a first power voltage for driving the light emitting element is applied, and a third node electrically connected to the light emitting element; a first emission control transistor having an on-off timing controlled by a first emission control signal; and a second emission control transistor having an on-off timing controlled by a second emission control signal. A time interval exists between a time at which the first emission control signal having a turn-on level is input such that a voltage of the second node is dropped from a bias voltage having a voltage level higher than a voltage level of the first power voltage and a time at which the second emission control signal having a turn-on level is input.Type: GrantFiled: April 12, 2023Date of Patent: March 5, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Young Ha Sohn, Se Hyuk Park, Jin Wook Yang, Dong Gyu Lee, Jae Hyeon Jeon
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Patent number: 11908850Abstract: A display device with high resolution is provided. A display device with high display quality is provided. The display device includes a substrate, an insulating layer, a plurality of transistors, and a plurality of light-emitting diodes. The plurality of light-emitting diodes are provided in a matrix over the substrate. Each of the plurality of transistors is electrically connected to at least one of the plurality of light-emitting diodes. The plurality of light-emitting diodes are positioned closer to the substrate than the plurality of transistors are. The plurality of light-emitting diodes emit light toward the substrate. Each of the plurality of transistors includes a metal oxide layer and a gate electrode. The metal oxide layer includes a channel formation region. The top surface of the gate electrode is substantially level with the top surface of the insulating layer.Type: GrantFiled: August 22, 2019Date of Patent: February 20, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Koji Kusunoki, Shingo Eguchi, Takayuki Ikeda
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Patent number: 11893933Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for compensating an image to be shown on a display including an array of light-emitting pixels and a sensor arranged to receive light transmitted by adjacent light-emitting pixels. A method includes collecting, from the sensor, a luminance of light received by the sensor during an emission-on period, and a luminance of light received by the sensor during an emission-off period. The method includes calculating, by comparing the luminance during the emission-on period to the luminance during the emission-off period, a luminance of light internally reflected from the adjacent pixels and received by the sensor during the emission-on period. The method includes determining that an error between the luminance of light internally reflected and a reference luminance equals or exceeds a threshold error, and adjusting a driving voltage for driving the pixels to reduce the error.Type: GrantFiled: January 24, 2020Date of Patent: February 6, 2024Assignee: Google LLCInventors: Sun-il Chang, Hyunchul Kim
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Patent number: 11877365Abstract: A light-emitting diode (LED) backlight driving circuit is provided. The LED backlight driving circuit includes M LED light-emitting unit groups connected in series and each of the LED light-emitting unit groups includes N LED light-emitting units connected in parallel, where both N and M are an integer greater than 1, wherein each of the LED light-emitting units is connected in series with at least a variable resistor with variable resistance for balancing a voltage difference. The present application further provides a backlight module and a liquid crystal display device manufactured using the LED backlight driving circuit.Type: GrantFiled: August 10, 2020Date of Patent: January 16, 2024Assignee: TCL China Star Optoelectronics Technology Co., Ltd.Inventor: Kaifeng Zhou
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Patent number: 11869977Abstract: A semiconductor device that can operate at high speed or having high strength against stress is provided. One embodiment of the present invention is a semiconductor device including a semiconductor film including a channel formation region and a pair of impurity regions between which the channel formation region is positioned; agate electrode overlapping side and top portions of the channel formation region with an insulating film positioned between the gate electrode and the side and top portions; and a source electrode and a drain electrode in contact with side and top portions of the pair of impurity regions.Type: GrantFiled: November 8, 2022Date of Patent: January 9, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 11862095Abstract: An OLED display system having compensation or loss of brightness is provided, including OLED-based display pixels, a sensing system having sensors, a processor having an LIA, an LPF, and analog to digital circuitry connected to each sensor and for providing a sensor signal for each sensor. The processor is adapted to apply a drive signal having a periodic signal to at least one OLED pixel in the display, receive the sensor signal, provide a primary frequency component from the sensor signals using the LIA based on the periodic signal, provide secondary frequency components from the sensor signals using the LPF, convert the secondary frequency components to a digital signal using the ADC, provide the digital signal to the processor as a sensing signal, and determine compensation for the drive signal. A method is also provided.Type: GrantFiled: June 14, 2022Date of Patent: January 2, 2024Assignee: eMagin CorporationInventors: Seonki Kim, Amalkumar P. Ghosh, Olivier Prache, Hyuk Sang Kwon
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Patent number: 11864435Abstract: The present disclosure provides an array substrate and a display device. The array substrate includes: a sub-pixel, in a display region and including a light-emitting element, the light-emitting element including a first electrode, a light-emitting layer and a second electrode; a positive power line, connected to the first electrode; a positive power bus, connected to the positive power line; three positive power access ends, at a side of the positive power bus away from a display region, and respectively connected to the positive power bus; a negative power line; an auxiliary electrode, respectively connected to the negative power line and the second electrode; three negative power access ends, at the side of the positive power bus away from the display region, and respectively connected to the negative power line; and a negative power auxiliary line, respectively connected to the negative power access end and the auxiliary electrode.Type: GrantFiled: November 15, 2019Date of Patent: January 2, 2024Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Yao Huang, Weiyun Huang, Yue Long, Chao Zeng, Meng Li
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Patent number: 11862072Abstract: A pixel includes a light emitting element, a first transistor including a first electrode electrically connected to a first voltage line which supplies a first driving voltage, a second electrode electrically connected to the light emitting element, and a gate electrode connected to a first node, a second transistor connected between the first node and a second node and including a gate electrode connected to a first scan line, a third transistor connected between the second electrode of the first transistor and the second node and including a gate electrode connected to a second scan line, and a booting capacitor connected between the second node and the second scan line.Type: GrantFiled: October 21, 2022Date of Patent: January 2, 2024Assignee: Samsung Display Co., Ltd.Inventors: Minjae Jeong, Jangmi Kang, Hyeongseok Kim, Junhyun Park, Mukyung Jeon
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Patent number: 11862067Abstract: Circuitry comprises driver circuitry to control display of a prevailing display image by display elements of a display device, the driver circuitry generating a signal providing electrical charge for storage by display elements, in which an electrical charge stored by a display element controls a display output of that display element; detector circuitry to detect, for a display image transition from a current display image to a second, display image, a first set of one or more display elements which are in a respective first state controlled by a first stored electrical charge in the current display image and which are required to be in a respective second state controlled by a second electrical charge, in the second display image; switching circuitry, responsive to the detector circuitry, to divert electrical charge from the set of display elements to secondary charge store in response to initiation of the display image transition.Type: GrantFiled: June 9, 2022Date of Patent: January 2, 2024Assignee: Arm LimitedInventors: Parameshwarappa Anand Kumar Savanth, Jedrzej Kufel, Benoit Labbe, Sahan Sajeewa Hiniduma Udugama Gamage
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Patent number: 11854486Abstract: An organic light emitting diode display with improved aperture ratio includes: a substrate; first and second pixels disposed in a first row of the substrate and third and fourth pixels disposed in a second row adjacent to the first row and respectively disposed in the same columns as the first and second pixels; a scan line and a previous scan line applying a scan signal and a previous scan signal, respectively, to the pixel units; a data line and a driving voltage line applying a data signal and a driving voltage, respectively, to the pixel units; and a common initialization voltage line disposed between the first and second pixels and between the third and fourth pixels, commonly connected to the pixel units, and applying an initialization voltage. One common initialization contact hole connected to all pixels units and one initialization voltage line connected to the common initialization contact hole are surrounded by the pixel units.Type: GrantFiled: November 28, 2022Date of Patent: December 26, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ju-Hee Hyeon, Hyun-Chol Bang
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Patent number: 11856813Abstract: The present invention provides a display panel and a manufacturing method thereof. The display panel includes a substrate, a light-shielding metal block and a transparent conductive block disposed on the substrate, a buffer layer disposed on the substrate, the light-shielding metal block, and the transparent conductive block, and an active layer pattern disposed on the buffer layer. The active layer pattern comprises a first conductive block, the first conductive block is disposed opposite to the transparent conductive block, the first conductive block is conductively formed by a semiconductor material, and the transparent conductive block and the first conductive block constitute two electrodes of a capacitor.Type: GrantFiled: March 2, 2020Date of Patent: December 26, 2023Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.Inventor: Xingyu Zhou
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Patent number: 11847960Abstract: The present disclosure provides a display panel, a method for driving the display panel, and a display apparatus. The display panel includes multiple pixel circuits. The pixel circuit includes a drive transistor and at least one switch unit. At least one switch unit includes M thin film transistors connected in parallel, and M is a positive integer greater than or equal to 2. The M thin film transistors are configured to be turned on during different display phases, respectively.Type: GrantFiled: June 16, 2022Date of Patent: December 19, 2023Assignees: WUHAN TIANMA MICROELECTRONICS CO., LTD., Wuhan Tianma Microelectronics Co., Ltd. Shanghai BranchInventors: Zhiyong Xiong, Yaolin Wang
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Patent number: 11839131Abstract: A semiconductor device comprises an electrode on a substrate, an insulating layer covering an edge of the electrode and disposed on the substrate, and an organic layer comprising a charge transport layer on the electrode and insulating layer and a functional layer, wherein the insulating layer has a first portion forming an angle of 0° to 50° with respect to a surface parallel to a lower surface of the electrode, a second portion located closer to the substrate than the first portion and sloping at more than 50°, and a third portion located closer to the organic layer than the first portion and sloping at more than 50°, wherein a length of the third portion in a direction perpendicular to the parallel surface is larger than a thickness of the charge transport layer at a position in contact with the electrode.Type: GrantFiled: August 25, 2020Date of Patent: December 5, 2023Assignee: Canon Kabushiki KaishaInventors: Tetsuo Takahashi, Hiroaki Sano, Daisuke Okabayashi
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Patent number: 11815960Abstract: A flexible display apparatus including: a first film including a first surface and a second surface that are opposite each other, and a first groove formed in the first surface, the first film having a first rigidity; a third film on the second surface of the first film; a fourth film facing the third film; an emission display unit between and encapsulated by the third film and the fourth film; and a second film on the fourth film and facing the first film, the second film having a second rigidity that is less than the first rigidity.Type: GrantFiled: October 10, 2022Date of Patent: November 14, 2023Assignee: Samsung Display Co., Ltd.Inventors: Valeriy Prushinskiy, Won-Sik Hyun, Hyong-Yeol Na, Min-Soo Kim, Mu-Gyeom Kim
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Patent number: 11804183Abstract: A display panel, a driving method of a display panel, and a display device are provided. The display panel includes pixel circuits and a gate driving circuit including cascaded first shift register units. A trigger signal input terminal of the first stage first shift register unit is connected to a trigger signal terminal through a first switch element. A signal output terminal of the i-th stage first shift register unit is connected to a trigger signal input terminal of the (i+1)-th stage first shift register unit through a second switch element. A trigger signal input terminal of the N-th stage first shift register unit is connected to the trigger signal terminal through a third switch element. A signal output terminal of the j-th stage first shift register unit is connected to a trigger signal input terminal of the (j?1)-th stage first shift register unit through a fourth switch element.Type: GrantFiled: January 28, 2022Date of Patent: October 31, 2023Assignees: WUHAN TIANMA MICRO-ELECTRONICS CO., LTD., WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCHInventors: Mengmeng Zhang, Yue Li, Yuantao Wu, Jing Huang
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Patent number: 11799998Abstract: A terminal device is provided and includes: a display screen; a glass cover plate disposed above the display screen; a housing with an accommodating gap, where the accommodating gap is below the glass cover plate; a light guide column disposed in the accommodating gap; and an infrared fill-in light is disposed below the light guide column, where a light-shielding body is disposed between the light guide column and the display screen.Type: GrantFiled: August 30, 2021Date of Patent: October 24, 2023Assignee: Vivo Mobile Communication Co., Ltd.Inventor: Pan Huang
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Patent number: 11790841Abstract: A pixel and a display device including the same are disclosed. The pixel includes a light emitting element, first through seventh transistors, and a first capacitor. The first transistor is connected between first and second nodes. The second transistor is connected between a data line and a fourth node and configured to be turned on by a first scan signal. The third transistor is connected between the first node and a third node and configured to be turned on by a second scan signal. The fourth transistor is connected between the fourth node and a third power line and configured to be turned on by a third scan signal. The fifth transistor is connected between the third node and the third power line and configured to be turned on by a fourth scan signal. The sixth transistor is connected between the first node and a fifth node and configured to be turned off by an emission control signal.Type: GrantFiled: December 1, 2022Date of Patent: October 17, 2023Assignee: Samsung Display Co., Ltd.Inventors: Byung Chang Yu, Hyun Joon Kim, Hae Min Kim, Myung Hoon Park, Dong Hoon Lee
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Patent number: 11776965Abstract: A light emitting display device includes a substrate including first subpixels, second subpixels and third subpixels; a first anode, having at least one opening, in each of the first subpixels; a second anode in each of the second subpixels, and a third anode in each of the third subpixels; a reflective insulating film at the opening of the first anode to contact the first anode under the first anode; an organic stack on each of the first anode, the second anode and the third anode; and a cathode on the organic stack.Type: GrantFiled: December 22, 2020Date of Patent: October 3, 2023Assignee: LG DISPLAY CO., LTD.Inventors: Eun-Hyung Lee, Soo-Won Hwang, In-Seop Jung
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Patent number: 11777064Abstract: A method of repairing a display device, in which the display device includes a defective pixel area including a defective wavelength conversion patter, the method including removing the defective wavelength conversion pattern of the defective pixel area, injecting ink including a wavelength conversion material into the defective pixel area, and curing the ink injected into the defective pixel area.Type: GrantFiled: September 21, 2020Date of Patent: October 3, 2023Assignee: Samsung Display Co., Ltd.Inventors: Ill Won Park, Ki Dae Shin, Joong Keun Lee
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Patent number: 11769342Abstract: An optical fingerprint identification system includes a base, a photo sensor, a light emitting layer and a cover. The photo sensor is disposed on the base. The light emitting layer is disposed above the photo sensor, and the light emitting layer includes a light emitting element. The cover is disposed above the light emitting layer. The optical fingerprint identification system further includes a light path adjusting element between the photo sensor and the cover. The light emitting element is disposed away from the light path adjusting element and the photo sensor in a sideway direction that is different from a stack direction of the optical fingerprint identification system.Type: GrantFiled: October 21, 2020Date of Patent: September 26, 2023Assignee: LARGAN PRECISION CO., LTD.Inventors: Hsiang-Chi Tang, Chun-Che Hsueh, Tsung-Han Tsai, Fuh-Shyang Yang
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Patent number: 11741895Abstract: A light-emitting device in which variation in luminance of pixels is suppressed. A light-emitting device includes at least a transistor, a first wiring, a second wiring, a first switch, a second switch, a third switch, a fourth switch, a capacitor, and a light-emitting element. The first wiring and a first electrode of the capacitor are electrically connected to each other through the first switch. A second electrode of the capacitor is connected to a first terminal of the transistor. The second wiring and a gate of the transistor are electrically connected to each other through the second switch. The first electrode of the capacitor and the gate of the transistor are electrically connected to each other through the third switch. The first terminal of the transistor and an anode of the light-emitting element are electrically connected to each other through the fourth switch.Type: GrantFiled: July 29, 2021Date of Patent: August 29, 2023Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Seiko Inoue, Hiroyuki Miyake
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Patent number: 11744126Abstract: A display device may include a display panel including a display area, a non-display area which may be disposed on a periphery of the display area, and a pad area which may be disposed on one side of the non-display area. The display panel may include data lines disposed in the display area of the display panel along a second direction which intersects a first direction, and connection lines disposed in the display area of the display panel along the first direction. A first data line among the data lines may be connected to a first connection line among the connection lines.Type: GrantFiled: April 22, 2022Date of Patent: August 29, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seung Hwan Cho, Jong Hyun Choi, Ju Chan Park, Seung Min Song, Min Seong Yi
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Patent number: 11735128Abstract: A driving method adapted to drive a first pixel of a display device to display an image in a frame time is provided. The driving method includes dividing the frame time into a first sub-frame time and a second sub-frame time; providing a first data with a first gray level; and controlling the first pixel to be emitted in the first sub-frame time or in the second sub-frame time according to the first data. When the first gray level is greater than a predetermined gray level, controlling the first pixel to be emitted in the first sub-frame time, and when the first gray level is less than or equal to the predetermined current level, controlling the first pixel to be emitted in the second sub-frame time.Type: GrantFiled: March 19, 2021Date of Patent: August 22, 2023Assignee: Innolux CorporationInventor: Hirofumi Watsuda
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Patent number: 11727845Abstract: A display device includes a display panel including pixels, and a display panel driver configured to perform a first sensing operation to receive first sensing data for a driving transistor of each of the pixels from the pixels, to perform a second sensing operation to receive second sensing data for a light emitting element, and to determine a degradation rate of the light emitting element based on the first sensing data and the second sensing data.Type: GrantFiled: October 21, 2022Date of Patent: August 15, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seokgyu Ban, Kyungman Kim
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Patent number: 11715422Abstract: A pixel includes an organic light emitting diode that includes first and second terminals. A driving transistor generates a driving current, and includes a first terminal for a first power supply voltage, a second terminal connected to the first terminal of the organic light emitting diode, and a gate terminal for an initialization voltage. The first switching transistor includes a first terminal connected to a first node, a second terminal connected to the gate terminal of the driving transistor, and a gate terminal for a data initialization gate signal. The second switching transistor includes a first terminal for the initialization voltage, a second terminal connected to the first node, a first gate terminal for the data initialization gate signal, and a second gate terminal for a light emitting element initialization signal. The first terminal of the organic light emitting diode is connected to the first node.Type: GrantFiled: July 22, 2022Date of Patent: August 1, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Keunwoo Kim
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Patent number: 11716870Abstract: Disclosed relates to a transparent display panel and manufacturing method of thereof, and the transparent display panel including a patterned cathode with improved transparency as a whole.Type: GrantFiled: November 22, 2022Date of Patent: August 1, 2023Assignee: LG Display Co., Ltd.Inventors: EunJu Kim, JongHyun Park
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Patent number: 11715406Abstract: A display device includes: a data driver for supplying a data signal to output lines; a demultiplexer connected to each of the output lines, the demultiplexer to supply the data signal supplied to each output line to a first data line and a second data line; first pixels disposed in a (2j?1)-th column and a (2k?1)-th row, the first pixels being connected to the first data line, wherein j and k are positive integers; second pixels disposed in the (2j?1)-th column and a (2k)-th row, the second pixels being connected to the second data line; third pixels disposed in a (2j)-th column and the (2k?1)-th row, the third pixels being connected to the first data line; and fourth pixels disposed in the (2j)-th column and the (2k)-th row, the fourth pixels being connected to the second data line.Type: GrantFiled: March 28, 2022Date of Patent: August 1, 2023Assignee: Samsung Display Co., Ltd.Inventors: Se Hyuk Park, Jin Young Roh, Woo Mi Bae, Hae Kwan Seo, Young Ha Sohn, Jin Wook Yang
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Patent number: 11690259Abstract: An organic light emitting display (OLED) device includes an organic light emitting diode having an anode and a cathode. The organic light emitting diode is configured to receive a reference voltage. A control transistor includes a first control electrode and a first semiconductor active layer. The control transistor is configured to receive a control signal. A driving transistor includes a second control electrode that is electrically connected to the control transistor, an input electrode that is configured to receive a power voltage, an output electrode that is electrically connected to the anode of the organic light emitting diode, and a second semiconductor active layer that includes a different material from that of the first semiconductor active layer. A shielding electrode is disposed on the second semiconductor active layer, overlapping the driving transistor, and configured to receive the power voltage.Type: GrantFiled: April 20, 2021Date of Patent: June 27, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Dongsoo Kim, Ji-Hyun Ka
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Patent number: 11683871Abstract: An image formation device is provided which includes a variable resistor of which a resistance value changes in accordance with a user operation, an A/D converter that outputs information relating to a voltage applied to the variable resistor, and a pulse width modulation (PWM) controller that outputs a PWM signal having a duty ratio determined based on the information output by the A/D converter. The PWM controller outputs the PWM signal that has the duty ratio determined based on the information input with reference to a timing for inverting a logic state of the PWM signal.Type: GrantFiled: April 2, 2021Date of Patent: June 20, 2023Assignee: Canon Kabushiki KaishaInventor: Hidemi Sasaki
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Patent number: 11682344Abstract: A pixel for a display device includes a light-emitting element, a first transistor including a first electrode electrically connected to a first node and controlling a driving current, a second transistor electrically connected between a data line and the first node and being turned on in response to a first scan signal supplied through a first scan line, a third transistor electrically connected between the second node and a third node electrically connected to a second electrode of the first transistor and being turned on in response to the first scan signal, and a fourth transistor being turned on in response to a second scan signal supplied through a second scan line, and applying a bias voltage to the first transistor. The fourth transistor is turned on at a first frequency. The second and third transistors are turned on at a second frequency different from the first frequency.Type: GrantFiled: May 10, 2022Date of Patent: June 20, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Na Young Kim, Dong Hwi Kim, Jin Jeon
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Patent number: 11682351Abstract: A display device includes a display panel, a power integrated circuit, a comparison circuit and a selection circuit. The display panel is configured to receive a system cross voltage. The power integrated circuit is configured to provide the system cross voltage to the display panel and includes a current conversion circuit configured to convert a calibration current outputted by the display panel when displaying a calibration frame into a detection voltage. The comparison circuit is configured to compare the detection voltage with a threshold to generate a comparison result. The selection circuit is configured to determine a magnitude of the system cross voltage according to the comparison result. The power integrated circuit is configured to generate the system cross voltage according to the magnitude of the system cross voltage determined by the selection circuit to provide the system cross voltage to the display panel.Type: GrantFiled: July 12, 2022Date of Patent: June 20, 2023Assignee: AUO CORPORATIONInventors: Feng-Sheng Lin, Ching-Sheng Cheng, Ming-Ci Siao, Wei-Jen Chen, Chun-Chi Lai, Yi-Yo Dai
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Patent number: 11671093Abstract: The present invention provides a driving device and a control method. The driving device is configured to drive a power switch and includes a power supply, a first bridge arm coupled to the power supply, a second bridge arm coupled in parallel to the first bridge arm, and a resonant inductor. The first bridge arm includes a first switch and a second switch connected to a first midpoint, the second bridge arm comprises a first semiconductor element and a second semiconductor element connected to a second midpoint, and the resonant inductor is coupled between the first midpoint and the second midpoint. The control method includes turning on the first switch for a first period such that the power supply charges a gate electrode of the power switch; and in response to a decrease of a current of the resonant inductor to a first threshold value, turning on the first switch again for a second period such that a potential of the first midpoint is equal to a potential of the second midpoint.Type: GrantFiled: March 18, 2022Date of Patent: June 6, 2023Assignee: Delta Electronics (Shanghai) Co., Ltd.Inventors: Jie Dong, Zhenqing Xu, Weiqiang Zhang
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Patent number: 11653516Abstract: An organic electroluminescent device, a method for fabricating the same, and a light emitting apparatus are disclosed. The organic electroluminescent device comprises a first light emitting layer and a second light emitting layer arranged on a surface of the first light emitting layer at a first side, and partially covers the surface of the first light emitting layer at the first side. Both the first and second light emitting layers are made from a material which has a larger mobility for a first carrier than a second carrier. Light emitting regions of the second light emitting layer and the regions of the first light emitting layer not covered by the second light emitting layer are configured to emit light of different colors at a preset light emitting ratio. A light emitting area ratio between a surface of each light emitting region and surfaces of the regions of the first light emitting layer not covered by the second light emitting layer is preset according to the preset light emitting ratio.Type: GrantFiled: May 11, 2018Date of Patent: May 16, 2023Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Changyen Wu, Wenfeng Song
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Patent number: 11653537Abstract: An electronic device including a base structure, a first pattern having at least one projection disposed on the base structure, a first conductive layer including a first portion disposed on the base structure and a second portion disposed on the first pattern and connected to the first portion, an insulating layer disposed on the first conductive layer covering the first portion and exposing the second portion, and a second conductive layer provided on the insulating layer and overlapping the first conductive layer. The second conductive layer is spaced apart from the first portion and is in contact with the second portion. Methods of manufacturing an electronic device capable of reducing the number of process steps in the manufacturing process are also disclosed.Type: GrantFiled: December 22, 2020Date of Patent: May 16, 2023Assignee: Samsung Display Co., Ltd.Inventors: Sungkyun Park, Jungha Son, Sangkyu Choi
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Patent number: 11640793Abstract: A display device may include a display panel including a plurality of pixels, a data driver which applies data signals to the display panel, a scan driver including scan stages, which sequentially applies scan signals to the display panel, an emission driver including an emission stage which sequentially applies emission signals to the display panel, and a power supply voltage generator which generates a power supply voltage including high voltages and low voltages, and provides the high voltages having different voltage levels from each other or the low voltages having different voltage levels from each other to at least one selected from the scan stages and the emission stage. The power supply voltage generator generates a first high voltage, a first low voltage, a second high voltage lower than the first high voltage, and a second low voltage higher than the first low voltage based on an input voltage.Type: GrantFiled: August 12, 2021Date of Patent: May 2, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sungjin Kim, Jongwon Park, Myeonghee Seo, Huigyeong Yun, Seung-Kyu Lee, Younguk Hwang
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Patent number: 11626059Abstract: A display device comprising a plurality of pixels arranged in multiple rows and multiple columns. The multiple pixel columns are connected with a plurality of source signal lines respectively. The pixels of odd-numbered rows in the same pixel column are connected with the source signal lines on a first side of the pixel column. The pixels of even-numbered rows in the same pixel column are connected with the source signal lines on a second side of the pixel column opposite the first side. A display control method comprising the steps of determining and storing target pixel potential data which comprises a target pixel potential for each of the plurality of source signal lines; and setting a potential of each source signal line as the target pixel potential corresponding to the source signal line in an interval zone between two adjacent frames.Type: GrantFiled: November 6, 2019Date of Patent: April 11, 2023Assignees: HEFEI BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Chunheng Zhang, Yizhan Han, Jun Wang, Jianwei Sun, Liugang Zhou
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Patent number: 11615752Abstract: A backlight device includes LED elements divided into dimming groups; a panel driver configured to output a reference current for driving the LED elements; and pixel circuits, each of which is connected to the panel driver through a common line and is respectively configured to drive first LED elements comprised in a corresponding dimming group. Each of the pixel circuits is configured to: in a first period of a frame period, obtain a reference voltage based on the reference current and store the reference voltage, in a second period of the frame period, obtain luminance data of an image displayed by the corresponding dimming group, and in a third period of the frame period, drive the first LED elements during a light emitting time corresponding to the luminance data obtained in the second period using the reference voltage stored in the first period.Type: GrantFiled: April 29, 2021Date of Patent: March 28, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Changju Lee, Yongil Kwon, Yoon-Kyung Choi, Junho Huh
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Patent number: 11616108Abstract: An organic light emitting diode display includes a substrate, an overlap layer on the substrate, a semiconductor layer on the overlap layer, a first gate conductor on the semiconductor layer, a second gate conductor on the first gate conductor, a data conductor on the second gate conductor, a driving transistor on the overlap layer, and an organic light emitting diode connected with the driving transistor. The driving transistor includes, in the semiconductor layer, a first electrode, a second electrode, with a channel therebetween. A gate electrode of the first gate conductor overlaps the channel. The overlap layer overlaps the channel of the driving transistor and at least a portion of the first electrode. A storage line of the second gate conductor receives a driving voltage through a driving voltage line in the data conductor. The overlap layer receives a constant voltage.Type: GrantFiled: October 23, 2019Date of Patent: March 28, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Joon Woo Bae, Mee Jae Kang, Thanh Tien Nguyen, Kyoung Won Lee, Yong Su Lee, Jae Seob Lee, Gyoo Chul Jo, Myoung Geun Cha
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Patent number: 11610955Abstract: A display device includes a substrate, a display unit disposed over the substrate, and an encapsulation layer sealing the display unit. The display unit includes a thin film transistor, a display element electrically connected to the thin film transistor, a protection layer, and a planarization layer. The protection layer and the planarization layer are disposed between the thin film transistor and the display element. The display unit includes a display area and a non-display area outside the display area. The non-display area includes a voltage line. The planarization layer includes a dividing region dividing the planarization layer into a center portion and an outer portion. The dividing region surrounds the display area. The voltage line is partially disposed in the dividing region. The protection layer at least covers the sides of the voltage line disposed in the dividing region.Type: GrantFiled: March 18, 2020Date of Patent: March 21, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kihoon Kim, Deukjong Kim
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Patent number: 11574583Abstract: The light emitting display panel includes a plurality of pixels, a plurality of gate lines transferring gate signals to the plurality of pixels, a plurality of data lines transferring data voltages to the plurality of pixels, and a sensing line connected to a plurality of light emitting devices respectively included in the plurality of pixels. Each of the plurality of pixels includes a light emitting device, a sensing control transistor including a first terminal connected to a first terminal of the light emitting device and a gate connected to a sensing control line, and a sensing switching transistor including a first terminal connected to a second terminal of the sensing control transistor, a second terminal connected to the sensing line, and a gate connected to a sensing switching line.Type: GrantFiled: September 2, 2021Date of Patent: February 7, 2023Assignee: LG Display Co., Ltd.Inventors: Intae Ko, Kyeongseob Kwon
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Patent number: 11569224Abstract: A semiconductor device including a substrate, a seed layer, a buffer layer, a channel layer, a barrier layer, a gate structure, a first source/drain structure, a second source/drain structure, and a contact is provided. The seed layer is disposed on the substrate. The buffer layer is disposed on the seed layer. The channel layer is disposed on the buffer layer. The barrier layer is disposed on the channel layer. The gate structure is disposed on the barrier layer. The first and second source/drain structures are disposed on opposite sides of the gate structure. The contact contacts the first source/drain structure. The distance between the gate structure and the contact is between 0.5 micrometers and 30 micrometers.Type: GrantFiled: December 14, 2020Date of Patent: January 31, 2023Assignee: Vanguard International Semiconductor CorporationInventors: Yeh-Jen Huang, Wen-Hsin Lin, Chun-Jung Chiu, Shin-Cheng Lin, Jian-Hsing Lee
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Patent number: 11551613Abstract: A pixel circuit including an organic light-emitting element, a switching transistor, a storage capacitor that stores a data signal applied via a data line, a driving transistor that allows a driving current corresponding to the data signal to flow into the organic light-emitting element, an emission control transistor electrically connected to the organic light-emitting element and the driving transistor in series, and sync transistors electrically connected to a bottom metal electrode of the driving transistor. The sync transistors include a first sync transistor electrically connected to a first one selected from a source electrode of the driving transistor, a gate electrode of the driving transistor, the high power voltage, and the low power voltage and a second sync transistor electrically connected to a second one selected from the source electrode of the driving transistor, the gate electrode of the driving transistor, the high power voltage, and the low power voltage.Type: GrantFiled: February 21, 2022Date of Patent: January 10, 2023Assignee: Samsung Display Co., Ltd.Inventor: Young-Cheol Jeong
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Patent number: 11545542Abstract: A display panel, a display device, and a method for manufacturing a display panel are disclosed. The display panel includes a first power bus and a first power line. A display region of the display panel includes a first region and a second region, the first region and the second region include a plurality of first pixel units, respectively, the first power bus is between the first region and the second region, and the first power line is electrically connected to the first power bus and extends from the first power bus to the first region and the second region, respectively, so as to supply power to the plurality of first pixel units in the first region and the second region, respectively.Type: GrantFiled: January 22, 2019Date of Patent: January 3, 2023Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.Inventors: Yong Yu, Chang Zhang, Lixia Shen, Qun Jia, Xuerui Gong
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Patent number: 11545094Abstract: Provided are a shift register, a display panel, a driving method, and a display device. The shift register includes a plurality of shift register units that are cascaded, where each of the plurality of shift register units includes a latch circuit, at least one scan switch circuit and at least one light emission control switch circuit; where the latch circuit is configured to, in response to a clock signal inputted by a clock signal input, latch an upper-stage shift signal inputted by an upper-stage shift signal input and output the upper-stage shift signal through a lower-stage shift signal output; each of the at least one scan switch circuit is configured to, in response to a lower-stage shift signal outputted by the lower-stage shift signal output, output a scan signal inputted by a scan signal input through a scan signal output.Type: GrantFiled: September 30, 2021Date of Patent: January 3, 2023Assignee: SEEYA OPTRONICS CO., LTD.Inventors: Ping-Lin Liu, Tong Wu
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Patent number: 11546500Abstract: Provided is a display apparatus including: a display module; a housing accommodating the display module; a transparent substrate disposed on a front surface of the display module and installed in the housing; a transmitter disposed on one end of the transparent substrate and generating light; a receiver installed on the other end of the transparent substrate to face the transmitter in a first direction, and receiving the light emitted from the transmitter; and a receiver installed on the other end of the transparent substrate to face the transmitter in a first direction, and receiving the light emitted from the transmitter; and a control unit driving the display module, and determining whether the transparent substrate is damaged based on a signal received from the receiver.Type: GrantFiled: April 13, 2021Date of Patent: January 3, 2023Assignee: LG ELECTRONICS INC.Inventors: Jaebeom Lee, Sangkwon Kim, Taewook Kim