Patents by Inventor Lijun Zhao
Lijun Zhao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11651615Abstract: The disclosure provides a fingerprint identification panel. The fingerprint identification panel includes an encapsulation layer, a light emitting element, a light sensing element and a dielectric layer. The light emitting element and the light sensing element are on a same side of the encapsulation layer, and the encapsulation layer is configured to enable light emitted from the light emitting element to be totally reflected in the encapsulation layer; the dielectric layer is between the encapsulation layer and the light sensing element and in direct contact with the encapsulation layer, and is configured to enable the light totally reflected by the encapsulation layer to be received by the light sensing element after passing through the dielectric layer, and a refractive index of the dielectric layer is smaller than that of the encapsulation layer.Type: GrantFiled: August 9, 2019Date of Patent: May 16, 2023Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Lei Wang, Haisheng Wang, Yingming Liu, Xiaoliang Ding, Lijun Zhao, Yuzhen Guo, Xiaoquan Hai
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Patent number: 11651725Abstract: There is provided a fingerprint identification pixel driving circuit, including: a fingerprint signal identification element configured to transmit an ultrasonic wave and receive a reflected ultrasonic wave according to a voltage of a first node and a signal of a second signal terminal to generate a sensing signal; a drive reading element configured to drive a light emitting element according to the voltage of the first node and generate a sensing current according to the sensing signal; a fingerprint signal reading element configured to output the sensing current; a pixel charging element configured to write a signal of a data line terminal to a storage element; the storage element configured to store the sensing signal or the signal of the data line terminal; a light emitting control element configured to control light emitting of the light emitting element; and the light emitting element configured to emit light.Type: GrantFiled: April 22, 2020Date of Patent: May 16, 2023Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Lijun Zhao, Yingming Liu, Haisheng Wang, Yanling Han, Yuzhen Guo, Chenyang Zhang
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Publication number: 20230101504Abstract: There is provided a fingerprint identification pixel driving circuit, including: a fingerprint signal identification element configured to transmit an ultrasonic wave and receive a reflected ultrasonic wave according to a voltage of a first node and a signal of a second signal terminal to generate a sensing signal; a drive reading element configured to drive a light emitting element according to the voltage of the first node and generate a sensing current according to the sensing signal; a fingerprint signal reading element configured to output the sensing current; a pixel charging element configured to write a signal of a data line terminal to a storage element; the storage element configured to store the sensing signal or the signal of the data line terminal; a light emitting control element configured to control light emitting of the light emitting element; and the light emitting element configured to emit light.Type: ApplicationFiled: April 22, 2020Publication date: March 30, 2023Inventors: Lijun ZHAO, Yingming LIU, Haisheng WANG, Yanling HAN, Yuzhen GUO, Chenyang ZHANG
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Publication number: 20230087503Abstract: An ultrasonic fingerprint sensor apparatus is provided. The ultrasonic fingerprint sensor apparatus includes an array of a plurality of ultrasonic sensors on a base substrate. A respective one of the plurality of ultrasonic sensors includes a first electrode, a second electrode, and a piezoelectric layer between the first electrode and the second electrode. The ultrasonic fingerprint sensor apparatus further includes a plurality of bias lines respectively electrically connected to a plurality of columns of ultrasonic sensors in the array of the plurality of ultrasonic sensors. The ultrasonic fingerprint sensor apparatus further includes a polarization electrode; a first lead line electrically connected to the polarization electrode; and a second lead line electrically connected to the plurality of bias lines. The first lead line and the second lead line are in a peripheral region of the ultrasonic fingerprint sensor apparatus.Type: ApplicationFiled: September 27, 2019Publication date: March 23, 2023Applicant: BOE Technology Group Co., Ltd.Inventors: Yingming Liu, Haisheng Wang, Yanling Han, Yuzhen Guo, Lijun Zhao
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Patent number: 11579274Abstract: An ultrasonic sensing module, an ultrasonic sensing device and a control method thereof, and a display device. The ultrasonic sensing module includes a first electrode layer, a piezoelectric layer, a receiving electrode layer and an emission electrode layer. The first electrode layer is on a first side of the piezoelectric layer; the receiving electrode layer and the emission electrode layer insulated from the receiving electrode layer are on a second side of the piezoelectric layer; and the second side is opposite to the first side.Type: GrantFiled: March 27, 2020Date of Patent: February 14, 2023Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Xiufeng Li, Yingming Liu, Haisheng Wang, Xiaoliang Ding, Pengpeng Wang, Yuzhen Guo, Lijun Zhao, Chenyang Zhang, Yaqian Ji, Yanling Han, Peixiao Li
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Patent number: 11567954Abstract: Seed patterns are derived from a sequence database. Execution costs for types of seed patterns are computed. Each seed pattern is iteratively distributed to distributed nodes along with that seed pattern's assigned execution cost. The distributed nodes processing in parallel to mine the sequence database for super patterns found in the sequence database. When a distributed node exhausts its execution budget, any remaining mining needed for the seed pattern being mined is reallocated to another distributed node having remaining execution budget.Type: GrantFiled: March 21, 2019Date of Patent: January 31, 2023Assignee: Teradata US, Inc.Inventors: Tao Li, Lijun Zhao, Yu Wang, Wenjie Wu, Qian Zhang, Shaoming Li
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Patent number: 11532151Abstract: A vision-LiDAR fusion method and system based on deep canonical correlation analysis are provided. The method comprises: collecting RGB images and point cloud data of a road surface synchronously; extracting features of the RGB images to obtain RGB features; performing coordinate system conversion and rasterization on the point cloud data in turn, and then extracting features to obtain point cloud features; inputting point cloud features and RGB features into a pre-established and well-trained fusion model at the same time, to output feature-enhanced fused point cloud features, wherein the fusion model fuses RGB features to point cloud features by using correlation analysis and in combination with a deep neural network; and inputting the fused point cloud features into a pre-established object detection network to achieve object detection. A similarity calculation matrix is utilized to fuse two different modal features.Type: GrantFiled: April 29, 2022Date of Patent: December 20, 2022Assignee: TSINGHUA UNIVERSITYInventors: Xinyu Zhang, Li Wang, Jun Li, Lijun Zhao, Zhiwei Li, Shiyan Zhang, Lei Yang, Xingang Wu, Hanwen Gao, Lei Zhu, Tianlei Zhang
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Patent number: 11519786Abstract: The present disclosure provides a temperature detection circuit. The temperature detection circuit includes: a first comparator, the first comparator having a first negative input terminal, a first positive input terminal and a first output terminal, the first negative input terminal being connected with an output terminal of a temperature sensor, the first positive input terminal being connected with a first reference voltage terminal; a monostable trigger, an input terminal of the monostable trigger being connected with the first output terminal of the first comparator; a low pass filter, an input terminal of the low pass filter being connected with an output terminal of the monostable trigger. The present disclosure further provides a temperature sensor device and a display device.Type: GrantFiled: September 4, 2018Date of Patent: December 6, 2022Assignee: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.Inventors: Pengpeng Wang, Xue Dong, Haisheng Wang, Chunwei Wu, Xiaoliang Ding, Chihjen Cheng, Yanling Han, Wei Liu, Xueyou Cao, Ping Zhang, Lijun Zhao
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Publication number: 20220366681Abstract: A vision-LiDAR fusion method and system based on deep canonical correlation analysis are provided. The method comprises: collecting RGB images and point cloud data of a road surface synchronously; extracting features of the RGB images to obtain RGB features; performing coordinate system conversion and rasterization on the point cloud data in turn, and then extracting features to obtain point cloud features; inputting point cloud features and RGB features into a pre-established and well-trained fusion model at the same time, to output feature-enhanced fused point cloud features, wherein the fusion model fuses RGB features to point cloud features by using correlation analysis and in combination with a deep neural network; and inputting the fused point cloud features into a pre-established object detection network to achieve object detection. A similarity calculation matrix is utilized to fuse two different modal features.Type: ApplicationFiled: April 29, 2022Publication date: November 17, 2022Applicant: Tsinghua UniversityInventors: Xinyu ZHANG, Li WANG, Jun LI, Lijun ZHAO, Zhiwei LI, Shiyan ZHANG, Lei YANG, Xingang WU, Hanwen GAO, Lei ZHU, Tianlei ZHANG
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Patent number: 11487389Abstract: The present disclosure provides a fingerprint recognition module, a driving method thereof, a manufacturing method thereof, and a display device. The fingerprint recognition module includes a receiving electrode layer, a piezoelectric material layer, and a driving electrode layer. The receiving electrode layer includes a plurality of receiving electrodes arranged in an array along a first direction and a second direction. The piezoelectric material layer is disposed on a side of the receiving electrode layer. The driving electrode layer is disposed on a side of the piezoelectric material layer remote from the receiving electrode layer and includes a plurality of driving electrodes arranged along the second direction. Each driving electrode is a strip electrode extending along the first direction, and overlaps with multiple receiving electrodes arranged along the first direction.Type: GrantFiled: September 12, 2019Date of Patent: November 1, 2022Assignee: Beijing BOE Technology Development Co., Ltd.Inventors: Yuzhen Guo, Yingming Liu, Haisheng Wang, Peixiao Li, Chenyang Zhang, Xiufeng Li, Lijun Zhao, Yanling Han
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Publication number: 20220327969Abstract: Disclosed are a foldable display panel and a foldable display apparatus. The foldable display panel includes a first display area and a second display area which are connected in a foldable manner. When the foldable display panel is in a first state, the first display area is light-emitted and the second display area is not light-emitted; and when the foldable display panel is in a second state, both the first display area and the second display area are light-emitted. A density of a drive current of the second display area is set to be greater than a density of a drive current of the first display area when the first display area and the second display area are in the second state.Type: ApplicationFiled: June 16, 2022Publication date: October 13, 2022Applicant: Hefei Visionox Technology Co., Ltd.Inventors: Hongqing FENG, Hongrui LI, Lijun ZHAO, Bing ZHANG, Cuili GAI, Liwei DING
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Publication number: 20220292798Abstract: A device for identifying a pattern over a first surface includes a photosensitive layer, and a light-guiding layer disposed between the photosensitive layer and the first surface. The photosensitive layer includes a plurality of photosensitive elements, each configured to convert incident light into an electrical signal. The light-guiding layer includes a plurality of light-guiding units, each positionally corresponding to one of the plurality of photosensitive elements. Each light-guiding unit include a plurality of light-transmitting portions, each configured to guide a light beam reflected from a feature of the pattern positionally corresponding thereto to transmit therethrough and reach one of the plurality of photosensitive elements corresponding to the each of the plurality of light-guiding units. The device can be used for identification of fingerprint, as well as other biometric or non-biometric features, and has a reduced thickness and an improved accuracy for pattern identification.Type: ApplicationFiled: May 27, 2022Publication date: September 15, 2022Applicant: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Pinchao GU, Haisheng WANG, Chunwei WU, Yingming LIU, Rui XU, Changfeng LI, Lijun ZHAO, Yanan JIA, Yuzhen GUO, Yunke QIN
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Patent number: 11422040Abstract: The present disclosure relates to a temperature detection circuit, a display panel, and a display device. The temperature detection circuit includes: an odd number of inverters coupled end to end in series to form a loop; and a plurality of switches, two terminals of each of which correspondingly coupled to two terminals of an even number of inverters, which are coupled continuously, among the odd number of inverters.Type: GrantFiled: September 20, 2017Date of Patent: August 23, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Chih Jen Cheng, Lijun Zhao
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Patent number: 11408777Abstract: The present disclosure discloses a temperature sensor, a display panel, and a display apparatus, in the field of sensors. The temperature sensor includes a ring oscillator consisting of n levels of phase inverters, where n is an odd number greater than or equal to 1. Each level of phase inverter includes a first thin film transistor (TFT) and a second TFT that are connected in series. An on/off state of the second TFT is configured to be in a normally-on state, an on/off state of the first TFT is configured to be determined by a signal input to the phase inverter, and mobility of an active layer material of the first TFT is greater than mobility of an active layer material of the second TFT.Type: GrantFiled: June 12, 2018Date of Patent: August 9, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Lijun Zhao, Yingming Liu, Haisheng Wang, ChihJen Cheng, Pengpeng Wang, Chunwei Wu
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Patent number: 11402949Abstract: A detection panel, a display apparatus, a method for driving the detection panel, and a method for manufacturing the detection panel are provided. The detection panel includes an upper electrode layer, a piezoelectric material layer and a conductive backing layer which are sequentially stacked. The piezoelectric material layer is configured to change an electric field between the upper electrode layer and the conductive backing layer under an ultrasonic wave, and generate an ultrasonic wave under an electric field. The conductive backing layer includes a plurality of noise elimination members, and each of the noise elimination members has a dimension in a direction parallel to the detection panel that gradually decreases in a direction distal to the piezoelectric material layer.Type: GrantFiled: June 10, 2020Date of Patent: August 2, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Chenyang Zhang, Haisheng Wang, Yingming Liu, Xiufeng Li, Yanling Han, Yuzhen Guo, Lijun Zhao, Peixiao Li
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Patent number: 11387016Abstract: A transmission line substrate includes a stacked body that includes insulating base materials, first and second signal lines, and first and second ground conductors. The second signal line is provided on a layer different from the layer of the first signal line and extends in parallel with the first signal line. The first ground conductor is provided on the same layer as the layer of the second signal line and overlapped with the first signal line when viewed in the Z-axis direction. The second ground conductor is provided on the same layer as the layer of the first signal line and overlapped with the second signal line when viewed in the Z-axis direction. A first transmission line includes the first signal line, the first ground conductor, and an insulating base material, and a second transmission line includes the second signal line, the second ground conductor, and the insulating base material.Type: GrantFiled: April 30, 2021Date of Patent: July 12, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takahiro Baba, Lijun Zhao, Chu Xu, Hiromasa Koyama, Satoshi Matsuura
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Patent number: 11386690Abstract: A fingerprint identification module and a driving method therefor, and a display apparatus. The fingerprint identification module includes a base substrate and a plurality of fingerprint identification regions located on the base substrate, each fingerprint identification region includes a plurality of receiving electrodes, a piezoelectric material layer and a plurality of driving electrodes; and the plurality of receiving electrodes, the piezoelectric material layer and the plurality of driving electrodes form a plurality of ultrasonic sensors.Type: GrantFiled: August 21, 2020Date of Patent: July 12, 2022Assignee: BOE Technology Group Co., Ltd.Inventors: Xiufeng Li, Yingming Liu, Haisheng Wang, Xue Dong, Yuzhen Guo, Lijun Zhao, Chenyang Zhang, Yaqian Ji, Yanling Han, Peixiao Li
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Patent number: 11373386Abstract: A device for identifying a pattern over a first surface includes a photosensitive layer, and a light-guiding layer disposed between the photosensitive layer and the first surface. The photosensitive layer includes a plurality of photosensitive elements, each configured to convert incident light into an electrical signal. The light-guiding layer includes a plurality of light-guiding units, each positionally corresponding to one of the plurality of photosensitive elements. Each light-guiding unit includes a plurality of light-transmitting portions, each configured to guide a light beam reflected from a feature of the pattern positionally corresponding thereto to transmit therethrough and reach one of the plurality of photosensitive elements corresponding to the each of the plurality of light-guiding units. The device can be used for identification of fingerprint, as well as other biometric or non-biometric features, and has a reduced thickness and an improved accuracy for pattern identification.Type: GrantFiled: August 13, 2018Date of Patent: June 28, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Pinchao Gu, Haisheng Wang, Chunwei Wu, Yingming Liu, Rui Xu, Changfeng Li, Lijun Zhao, Yanan Jia, Yuzhen Guo, Yunke Qin
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Patent number: 11361576Abstract: A circuit for generating and detecting ultrasonic sensing signals is provided. A piezoelectric device having a transmitting electrode and a receiving electrode is coupled to a biasing-and-sampling sub-circuit configured to set different bias voltages to the receiving electrode. The piezoelectric device is configured to transmit an ultrasonic signal upon applying an exciting pulse signal to the transmitting electrode and alternatively to generate a voltage signal at the receiving electrode upon receiving an echo signal based on the ultrasonic signal. A signal-collecting sub-circuit is coupled to the receiving electrode to determine a first sampling voltage based on the voltage signal at the receiving electrode in a first sampling period and a second sampling voltage based on the voltage signal at the receiving electrode in a second sampling period. An output sub-circuit is coupled to the signal-collecting sub-circuit for outputting the first sampling voltage and the second sampling voltage at a same time.Type: GrantFiled: May 21, 2019Date of Patent: June 14, 2022Assignee: BOE Technology Group Co., Ltd.Inventors: Xiufeng Li, Yingming Liu, Xiaoliang Ding, Lijun Zhao, Haisheng Wang, Yanling Han
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Patent number: 11341883Abstract: Disclosed are a display device and a method for adjusting its display brightness. The display device includes a display screen and an ambient light sensor in the display screen, wherein the ambient light sensor includes a photodeformable element, and the photodeformable element includes a photodeformable material layer; and the photodeformable element is configured to deform in response to a change in ambient light to obtain output of the ambient light sensor. The ambient light sensor has a simple structure and is easy to be made and to be combined with the display screen.Type: GrantFiled: January 31, 2018Date of Patent: May 24, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Yanan Jia, Xue Dong, Jing Lv, Haisheng Wang, Chun Wei Wu, Yingming Liu, Xueyou Cao, Rui Xu, Changfeng Li, Lijun Zhao, Yanling Han, Yuzhen Guo, Pinchao Gu, Yunke Qin