Electroluminescent Device Patents (Class 315/169.3)
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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: 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: 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: 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
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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: 11539018Abstract: 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 25, 2020Date of Patent: December 27, 2022Assignee: LG Display Co., Ltd.Inventors: EunJu Kim, JongHyun Park
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Patent number: 11538876Abstract: The disclosure provides LED display panel and manufacturing method thereof. LED display panel includes: substrate; LED on substrate; pixel defining layer defining pixel opening on substrate, the LED being within pixel opening; and first encapsulation layer on light emitting side of LED. Portion of first encapsulation layer within pixel opening includes sidewall inclined with respect to substrate, surface of sidewall close to LED includes first portions and second portions alternately arranged in direction away from LED and connected to each other, and inclination angles of first portions with respect to substrate are smaller than those of second portions with respect to substrate. Refractive index of material of first encapsulation layer is greater than refractive index of material of each of layer structures directly on both sides of first encapsulation layer in direction perpendicular to substrate.Type: GrantFiled: November 4, 2019Date of Patent: December 27, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventor: Binbin Cao
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Patent number: 11538877Abstract: The present disclosure relates to an organic light emitting diode display panel and a method of manufacturing the organic light emitting diode display panel. A display panel, including: a plurality of first light emitting layers arranged in an array in a first direction and a second direction; and a pixel defining layer including a plurality of first openings, wherein each first opening has a reduced size in the first direction, so that the corresponding first light emitting zone defined by the first opening has a first misalignment tolerance range in the first direction, and has a second misalignment tolerance range in the second direction, the corresponding first light emitting zone is allowed to shift in the first direction within the first misalignment tolerance range without overlapping the shaded region of the corresponding first light emitting layer.Type: GrantFiled: April 20, 2020Date of Patent: December 27, 2022Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.Inventor: Peng Xu
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Patent number: 11527198Abstract: Provided are a pixel driving circuit, a driving method thereof, a display panel and a display device. The pixel driving circuit includes a pulse-width adjustment module, an amplitude adjustment module and a light-emitting element. The pulse-width adjustment module is electrically connected to a sweep signal terminal and includes a pulse-width drive transistor. The pulse-width drive transistor is configured to supply a sweep signal supplied from the sweep signal terminal to the amplitude adjustment module. The amplitude adjustment module is configured to control the light emission duration of the light-emitting element according to the sweep signal. In the provided pixel driving circuit, driving method thereof, display panel and display device, a switching-off voltage for switching off the amplitude adjustment module does not need to be supplied additionally, thereby reducing the circuit complexity of a pixel driving circuit.Type: GrantFiled: March 28, 2022Date of Patent: December 13, 2022Assignee: Hubei Yangtze Industrial Innovation Center Of Advanced Display Co., Ltd.Inventor: Yingteng Zhai
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Patent number: 11522137Abstract: The present disclosure provides an organic light emitting element which has a pair of electrodes and an organic compound layer disposed therebetween and in which the organic compound layer contains an organic compound represented by the following general formula [1], wherein in the formula [1], Ar1 and Ar2 each independently represent an aromatic hydrocarbon group or a heteroaromatic ring group, R1 to R4 are each independently selected from a hydrogen atom or a substituent, R1 and R2 and R3 and R4 each may form a benzene ring, wherein the benzene ring may have at least one substituent.Type: GrantFiled: September 12, 2019Date of Patent: December 6, 2022Assignee: Canon Kabushiki KaishaInventors: Hirokazu Miyashita, Jun Kamatani
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Patent number: 11515361Abstract: The present disclosure provides a light emitting device and a method for manufacturing the same, and a display device. The light emitting device includes a plurality of light emitting units including a red light emitting unit, a green light emitting unit, and a blue light emitting unit, each light emitting unit including a micro-cavity structure. The light emitting device includes an anode structure, a cathode and a functional layer therebetween. The functional layer includes a light emitting layer including a red light emitting layer at least partially located in the red light emitting unit, an orthographic projection of the red light emitting layer on the backplane not overlapping with that of the blue light emitting unit on the backplane; a green light emitting layer at least partially located in the green light emitting unit; and a blue light emitting layer at least partially located in the blue light emitting unit.Type: GrantFiled: March 20, 2020Date of Patent: November 29, 2022Assignee: Beijing BOE Technology Development Co., Ltd.Inventors: Can Wang, Xiaochuan Chen, Minghua Xuan, Can Zhang, Angran Zhang
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Patent number: 11514857Abstract: 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: June 21, 2021Date of Patent: November 29, 2022Assignee: SAMSUNG DISPLAY CO., LTDInventors: Ju-Hee Hyeon, Hyun-Chol Bang
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Patent number: 11508852Abstract: 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; a gate 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: October 5, 2020Date of Patent: November 22, 2022Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 11499936Abstract: A sensor includes: a hole; a sensing area formed around the hole, wherein at least one sensor is in the sensing area; and a crack detector configured to output a first crack signal if a comparison value obtained by comparing a detected value from the at least one sensor with a reference value exceeds an error range.Type: GrantFiled: November 26, 2019Date of Patent: November 15, 2022Assignee: Samsung Display Co., Ltd.Inventors: Il Hun Jeong, Yeon Shil Jung, Hwan Woo Lee, Hae Goo Jung
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Patent number: 11495155Abstract: A pixel circuit includes a light emitting element, a first driver transistor, a second driver transistor, and a first compensation capacitor. A first terminal of the first driving transistor is configured to receive a power signal, and a second terminal of the first driving transistor is electrically coupled to the light emitting element. A first terminal of the second driving transistor receives the power signal, and a control terminal of the second driving transistor is electrically coupled to the light emitting element. The first compensation capacitance is electrically coupled to a control terminal of the first driving transistor and the second terminal of the second driving transistor, respectively.Type: GrantFiled: November 19, 2020Date of Patent: November 8, 2022Assignee: AU OPTRONICS CORPORATIONInventors: Chih-Lung Lin, Chin-Hsien Tseng, Po-Cheng Lai, Yu-Sheng Lin, Mao-Hsun Cheng
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Patent number: 11495167Abstract: An infinitely expandable display device according to an embodiment of the present disclosure includes a plurality of display units including a plurality of data drivers connected through a bidirectional interface circuit, and a timing controller commonly connected to the display units through the bidirectional interface circuit. Each of the data drivers includes a first reception circuit configured to receive a first interface signal in a first direction, a first transmission circuit configured to transmit the first interface signal in the first direction, a second reception circuit configured to receive a second interface signal in a second direction opposite the first direction, a second transmission circuit configured to transmit the second interface signal in the second direction, and a switch circuit SWP connected to the first transmission circuit, the second transmission circuit, and the second reception circuit.Type: GrantFiled: November 4, 2021Date of Patent: November 8, 2022Assignee: LG Display Co., Ltd.Inventors: Jun Woo Yun, Tae Gung Kim
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Patent number: 11455050Abstract: A display device with improved display quality and reduced power consumption is provided. The display device includes a gate driver, a display portion, and a selection signal output circuit. The display portion includes pixel circuits and scan lines. Each of the pixel circuits includes a display element. The gate driver is electrically connected to the scan lines. The first scan lines are electrically connected to the pixel circuits. The scan lines are each configured to receive a first scan signal. The selection signal output circuit is configured to output a first selection signal. The first selection signal is configured to supply the first scan signal to a selected scan line. The display element is configured to update display by the first scan signal. In the pixel circuits, one display element displays an image updated with a different update frequency from another display element.Type: GrantFiled: January 3, 2020Date of Patent: September 27, 2022Inventors: Hidenori Mori, Takahiro Fukutome
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Patent number: 11455954Abstract: A pixel of an organic light emitting diode (“OLED”) display device includes a switching transistor which transfers a data voltage, a storage capacitor which stores the data voltage transferred by the switching transistor, a driving transistor which generates a driving current based on the data voltage stored in the storage capacitor, an emission control transistor which selectively forms a path for the driving current in response to an emission control signal, an OLED which emits light based on the driving current, and a supplemental electrode overlapping a gate electrode of the driving transistor, the supplemental electrode having a first voltage for a predetermined time period from a time point at which the emission control signal has a turn-on level, and having a second voltage after the predetermined time period.Type: GrantFiled: May 13, 2021Date of Patent: September 27, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Yoomin Ko, Gun Hee Kim, Sang Hoon Kim, Taehoon Yang, Joohee Jeon
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Patent number: 11450293Abstract: A phase modulator for reflecting incident light at a desired angle includes pixel circuits and reflection pixels provided at positions where column data lines and row scanning lines orthogonal and intersect each other, and liquid crystal layers where each refractive index to incident light is changed by a driving voltage supplied from one pixel circuit. Each column data line outputs a control voltage which varies in a range up to a predetermined maximum voltage to corresponding pixel circuits. Each pixel circuit includes a charge pump for amplifying the control voltage. When the driving voltage supplied to a corresponding liquid crystal layer is not higher than the maximum voltage, the control voltage is outputted to the liquid crystal layer without amplifying. When the driving voltage supplied to the liquid crystal layer exceeds the maximum voltage, the control voltage is amplified by a charge pump and outputted to the liquid crystal layer.Type: GrantFiled: September 17, 2021Date of Patent: September 20, 2022Assignee: JVCKENWOOD CORPORATIONInventors: Takashi Nagoya, Shunsuke Izawa, Kensei Oe
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Patent number: 11444106Abstract: In case the size of the transistor is enlarged, power consumption of the transistor is increased. Thus, the present invention provides a display device capable of preventing a current from flowing to a display element in signal writing operation without varying potentials of power source lines for supplying a current to the display element per row. In setting a gate-source voltage of a transistor by applying a predetermined current to the transistor, a potential of a gate terminal of the transistor is adjusted so as to prevent a current from flowing to a load connected to a source terminal of the transistor. Therefore, a potential of a wire connected to the gate terminal of the transistor is differentiated from a potential of a wire connected to a drain terminal of the transistor.Type: GrantFiled: January 19, 2021Date of Patent: September 13, 2022Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Hajime Kimura
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Patent number: 11437411Abstract: The present invention discloses a thin film transistor (TFT) drive backplane and a Micro- light emitting diode (LED) display that by employing a structure of an oxide thin film transistor drive backplane with a high mobility can achieve fulfillment of the need for large size Micro-LED displays. Disposing the rear metal layer under the base substrate with the rear metal layer including a metal wire layer configured to connect with a drive chip and a metal light shielding layer configured to block ambient light reduces a spliced bezel of the display panel in application of large size Micro-LED displays, reduces depositing and patterning steps of the metal light shielding layer during manufacturing the thin film transistors and further reduces process steps of manufacturing a TFT drive backplane.Type: GrantFiled: August 22, 2019Date of Patent: September 6, 2022Inventors: Gongtan Li, Hyunsik Seo
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Patent number: 11437454Abstract: Disclosed are a backplane substrate that is capable of expressing high gradation even through a small pixel, a method of manufacturing the same, and an organic light-emitting display device using the same. Integration for ultra-high resolution is possible through structural modification.Type: GrantFiled: March 6, 2020Date of Patent: September 6, 2022Assignee: LG DISPLAY CO., LTD.Inventors: Kum-Mi Oh, Shun-Young Yang, Min-Seong Yun
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Patent number: 11417715Abstract: An array substrate, a display screen and a display device. The array substrate includes a base substrate, a non-transparent first OLED substrate, and a transparent second OLED substrate. The first OLED substrate at least partially surrounds the second OLED substrate. The second OLED substrate includes a first electrode layer located on the base substrate, a light emitting structure layer located on the first electrode layer, and a second electrode layer located on the light emitting structure layer. The first electrode layer includes a plurality of first electrodes. The light emitting structure layer includes a plurality of light emitting structures. A number of the first electrodes is less than a number of the light emitting structures. Each of the first electrodes corresponds to one of the light emitting structures.Type: GrantFiled: January 7, 2021Date of Patent: August 16, 2022Assignee: KunShan Go-Visionox Opto-Electronics Co., Ltd.Inventors: Mingxing Liu, Ying Zhao, Bing Han, Shuaiyan Gan, Feng Gao
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Patent number: 11404018Abstract: A display device comprises a power supply chip configured to output a gate-on voltage; a gamma chip configured to provide a gamma voltage; a detection resistor having a first terminal and a second terminal, wherein the first terminal is grounded; a display panel comprising a plurality of sub-pixels, a plurality of driving transistors and at least one detection transistor; wherein a gate electrode of the driving transistor receives the gate-on voltage, a first electrode of the driving transistor receives the gamma voltage, and a second electrode of the driving transistor is electrically connected to a corresponding sub-pixel; a gate electrode of the detection transistor receives the gate-on voltage, a first electrode of the detection transistor receives a test voltage, and a second electrode of the detection transistor is electrically connected to the second terminal; and a control circuit electrically connected to the second terminal.Type: GrantFiled: May 6, 2020Date of Patent: August 2, 2022Assignees: HKC Corporation Limited, CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Mingliang Wang
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Patent number: 11403994Abstract: A light emitting assembly includes active matrix (AM) light emitting circuits and an AM driver circuit. Each AM light emitting circuit includes at least one light emitting element, at least one shift register and a current control sub-circuit. The at least one shift register is configured to generate a control signal according to the clock signal from a clock line and the data signal from an inter-array data line and the control signal from the at least one shift register. The current control sub-circuit is configured to control the brightness of the at least one light emitting element according to the base current from a current supply line and the control signal. The AM driver circuit is configured to generate the data signal according to a serial data packet, and provide the data signal, the clock signal and the base current to the AM light emitting circuits.Type: GrantFiled: March 29, 2021Date of Patent: August 2, 2022Inventors: Chin-Chih Cheng, Ching-Chung Cheng
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Patent number: 11393804Abstract: A display device and a method for fabricating the same. The display device includes a substrate including a circuit layer and a first pad unit; an auxiliary substrate disposed below the substrate and comprising a driving circuit and a second pad unit; a light-emitting unit disposed on the circuit layer; and a connection electrode in contact with a side surface of the substrate and electrically connecting the first pad unit with the second pad unit. The method includes forming a circuit layer and a first pad unit on a first surface of a substrate; forming a driving circuit and a second pad unit on a fourth surface of an auxiliary substrate; and attaching a second surface of the substrate opposite the first surface to a third surface of the auxiliary substrate opposite the fourth surface.Type: GrantFiled: April 2, 2019Date of Patent: July 19, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seung Chan Lee, Gun Hee Kim, Sang Ho Park, Ju Won Yoon, Joo Hee Jeon, Hyun Joon Kim
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Patent number: 11393377Abstract: An electro-optical device is provided that includes a pixel circuit disposed corresponding to each of intersections of a scanning line and eight signal lines, an image signal circuit, and a control circuit. The image signal circuit includes a write switch provided for each of the eight signal lines, and in a horizontal scanning period, an image signal is sequentially supplied to the eight signal lines in eight supply periods based on selection signals sequentially selecting eight writing switches. The control circuit controls the selection signals so that a time length of a supply period at a positive polarity time of an image signal is longer than a time length of a supply period at a negative polarity time.Type: GrantFiled: April 14, 2021Date of Patent: July 19, 2022Assignee: SEIKO EPSON CORPORATIONInventor: Shinsuke Fujikawa
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Patent number: 11391439Abstract: Lighting systems combine UV-A and white light with an adjustable CCT value so that any adverse effects from the UV-A radiation are mitigated—that is, tunable adjustments to the output of the non-UV LEDs, or to all of the LEDs, result in an overall mixed output conforming to a target CCT value.Type: GrantFiled: March 23, 2021Date of Patent: July 19, 2022Assignee: JUGANU LTD.Inventors: Eran Ben-Shmuel, Ada Lotan, Alexander Bilchinsky, Eran Efrati, Jonathan Stok, Yossi Bechor, Yoav Bar, Noam Meir
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Patent number: 11386854Abstract: A pixel circuit includes: a driving switching element; a data initializer to initialize a voltage of a control electrode of the driving switching element; a data writer to write a data voltage to the driving switching element; an organic light emitting element; an organic light emitting element initializer to initialize an anode electrode of the organic light emitting element to a second initialization voltage based on an organic light emitting element initialization gate signal; and a light emitting controller to control an emission of the organic light emitting element. The organic light emitting element initializer includes: a control electrode to receive the organic light emitting element initialization gate signal; an input electrode to receive the second initialization voltage; an output electrode connected to the anode electrode; and a conductive layer to receive a compensation control signal that is different from the organic light emitting element initialization gate signal.Type: GrantFiled: June 25, 2019Date of Patent: July 12, 2022Assignee: Samsung Display Co., Ltd.Inventors: Gun-Hee Kim, Sang-Ho Park, Ju-Won Yoon, Seung-Chan Lee, Joo-Hee Jeon
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Patent number: 11380261Abstract: A pixel circuit, a pixel driving method and a display device are provided. The pixel circuit includes a light emitting element, a driving circuit, an energy storage circuit, an initialization circuit, a compensation control circuit, a light emitting control circuit and a written-in control circuit. The initialization circuit writes an initialization voltage into a control end of the driving circuit under the control of a first gate driving signal so as to conduct the connection between a first end of the driving circuit and a second end of the driving circuit; the compensation control circuit is configured to conduct the connection between the control end of the driving circuit and the second end of the driving circuit under the control of the second gate driving signal.Type: GrantFiled: January 20, 2020Date of Patent: July 5, 2022Assignees: ORDOS YUANSHENG OPTOELECTRONICS CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventor: Zhichong Wang
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Patent number: 11379087Abstract: A touch panel input device includes a plurality of first electrode lines, a plurality of second electrode lines, a drive circuit, a reception circuit, a touch detector, a ground state switching circuit, and a controller. The controller executes drive control for causing the drive circuit to sequentially input a drive signal to electrode lines in a non-ground state among each of the plurality of first electrode lines, in a state of controlling the ground state switching circuit to set a part of electrode lines among each of the plurality of first electrode lines and/or the plurality of second electrode lines to the non-ground state, and set the other electrode lines to a ground state.Type: GrantFiled: June 1, 2021Date of Patent: July 5, 2022Assignee: SHARP KABUSHIKI KAISHAInventor: Koichi Sugiyama
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Patent number: 11372505Abstract: The invention provides a touch display panel, a method for preparing the same, and a display device. The touch display panel includes a display module and a touch module that are arranged in a stack, the display module including two conductive layers and an intermediate insulation layer arranged between the two conductive layers, and the touch module including at least two touch electrodes and a touch insulation layer between the at least two touch electrodes, in which at least one of the intermediate insulation layer and the touch insulation layer is made of an organic material.Type: GrantFiled: April 1, 2020Date of Patent: June 28, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Qi Yao, Chuanxiang Xu
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Patent number: 11374054Abstract: An inorganic EL element including: an anode; a hole transporting layer; a light emitting layer; an electron transporting layer; and a cathode, the anode, the hole transporting layer, the light emitting layer, the electron transporting layer, and the cathode being stacked, wherein the hole transporting layer is an oxide film, the light emitting layer is an oxide film, and the electron transporting layer is an oxide film.Type: GrantFiled: March 13, 2019Date of Patent: June 28, 2022Assignee: RICOH COMPANY, LTD.Inventors: Naoyuki Ueda, Yuki Nakamura, Yukiko Abe, Shinji Matsumoto, Yuji Sone, Ryoichi Saotome, Sadanori Arae, Minehide Kusayanagi, Yuichi Ando
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Patent number: 11367770Abstract: Provided is a display device. The display device has a display area and a non-display area disposed around the display area and includes pixels disposed in the display area; and an intra-pixel bending area disposed along a direction of each of the pixels.Type: GrantFiled: February 12, 2020Date of Patent: June 21, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ju Chan Park, Sun Hee Lee, Sun Ho Kim, Hyun Kim
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Patent number: 11362133Abstract: A multi-color light emitting pixel unit includes a substrate, and a light emitting transistor formed on the substrate. The light emitting transistor includes a bottom conductive layer formed on the substrate and a top conductive layer formed over the bottom conductive layer, an upper light emitting layer formed between the top conductive layer and the bottom conductive layer, at least one lower light emitting layer formed between the upper light emitting layer and the bottom conductive layer, and an electrical connector electrically connecting the at least one lower light emitting layer and the bottom conductive layer.Type: GrantFiled: September 11, 2019Date of Patent: June 14, 2022Assignee: JADE BIRD DISPLAY (SHANGHAI) LIMITEDInventors: Qiming Li, Qunchao Xu
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Patent number: 11341911Abstract: A pixel circuit includes a storage capacitor unit, a driving transistor, a compensation unit, a switching unit, a light-emitting element and a current supply unit. The compensation unit is connected to a compensation control end, a gate electrode and a second electrode of the driving transistor, and the current supply unit, and configured to, under the control of the compensation control end, control the current supply unit to be electrically connected to, or electrically disconnected from, the gate electrode, and control the gate electrode to be electrically connected to, or electrically disconnected from, the second electrode. The switching unit is connected to a light-emitting control end, the second electrode, and a first end of the light-emitting element, and configured to control the second electrode to be electrically connected to, or electrically disconnected from, the first end of the light-emitting element under the control of the light-emitting control end.Type: GrantFiled: April 20, 2018Date of Patent: May 24, 2022Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Jiawei Qu, Linxuan Li, Taoran Zhang, Wenjun Liao
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Patent number: 11341893Abstract: Hybrid architectures and method methods of operating a display panel are described. In an embodiment, row driver and pixel driver functions are combined in a group of backbone hybrid pixel driver chips, wherein global signal lines are distributed to the backbone hybrid pixel driver chips, where the global signals are manipulated and distributed to a row of pixel driver chips.Type: GrantFiled: November 4, 2020Date of Patent: May 24, 2022Assignee: Apple Inc.Inventors: Xiang Lu, Mahdi Farrokh Baroughi, Xiaofeng Wang, Derek K. Shaeffer, Henry C. Jen, Hopil Bae
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Patent number: 11335757Abstract: The pixel circuit which controls the driving of the organic light emitting diode includes a driving TFT which supplies a driving current to the organic light emitting diode; a sampling TFT which samples a threshold voltage of the driving TFT; a first initializing TFT which supplies an initialization voltage to one electrode of the organic light emitting diode; and a storage capacitor which stores a voltage applied to the driving TFT, and at least one of the driving TFT, the sampling TFT, and the first initializing TFT includes a shielding electrode disposed between the substrate and the active layer. Therefore, even though the external light is irradiated onto a transparent substrate, a full white gray-level and a full black gray-level can be expressed so that the gray-level expressiveness may not be degraded.Type: GrantFiled: August 4, 2020Date of Patent: May 17, 2022Assignee: LG Display Co., Ltd.Inventors: Aram Kim, JaeHoon Park, YoungJang Lee, SeonYeong Kim
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Patent number: 11329116Abstract: A display device includes a first substrate including a display area in which a plurality of pixels are arranged and a light transmitting area disposed in the display area, an interlayer insulating layer covering the display area and exposing the light transmitting area, an inner sidewall of the interlayer insulating layer defining the light transmitting area, and an inorganic film disposed directly on the first substrate in the light transmitting area and overlapping the entire light transmitting area. A size of the light transmitting area is larger than a size of a pixel of the plurality of pixels.Type: GrantFiled: October 2, 2019Date of Patent: May 10, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seok Hoon Seo, Dae Sang Yun, Che Ho Lee, So Yeon Jeong
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Patent number: 11316138Abstract: A manufacturing method of a display device, includes: providing a display module bendable at a bending area and including: a passivation film including a polyimide and disposed both in and outside of the bending area, and an adhesive layer attaching a display panel to the passivation film and including a first adhesive portion in the bending area and a second adhesive portion outside of the bending area; reducing an adhesive force of the first adhesive portion, by irradiating a first laser which is a CO2 laser to the adhesive layer at the bending area, to provide the first adhesive portion which has reduced adhesive force; providing a groove in the passivation film and the adhesive layer, along a boundary of the bending area; and removing the passivation film and the first adhesive portion which has the reduced adhesive force, from the display panel, at the groove.Type: GrantFiled: November 5, 2019Date of Patent: April 26, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Tae Hyun Sung, Woo Hyun Kim, Hyo Jin Kim
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Patent number: RE49106Abstract: An organic light-emitting display device and a related manufacturing method of the organic light-emitting display device are disclosed. In one aspect, the organic light-emitting display device includes a plurality of pixels which are formed between a plurality of scan lines and a plurality of data signal lines. It also includes a plurality of initialization voltage lines which are formed in parallel with the plurality of scan lines and are shared between two adjacent pixels of a row to supply an initialization voltage to the two adjacent pixels. It also includes a driving voltage line which supplies a driving voltage to the plurality of pixels and includes a first voltage line formed in a vertical direction and a second voltage line that is connected between the two adjacent pixels and formed in a horizontal direction.Type: GrantFiled: August 8, 2018Date of Patent: June 14, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Hyun-Tae Kim
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Patent number: RE49201Abstract: An organic light-emitting display device and a related manufacturing method of the organic light-emitting display device are disclosed. In one aspect, the organic light-emitting display device includes a plurality of pixels which are formed between a plurality of scan lines and a plurality of data signal lines. It also includes a plurality of initialization voltage lines which are formed in parallel with the plurality of scan lines and are shared between two adjacent pixels of a row to supply an initialization voltage to the two adjacent pixels. It also includes a driving voltage line which supplies a driving voltage to the plurality of pixels and includes a first voltage line formed in a vertical direction and a second voltage line that is connected between the two adjacent pixels and formed in a horizontal direction.Type: GrantFiled: August 8, 2018Date of Patent: September 6, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Hyun-Tae Kim