Patents by Inventor Huiwen Xu

Huiwen Xu 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).

  • Patent number: 12272682
    Abstract: A micro multi-color LED device includes two or more LED structures for emitting a range of colors. The two or more LED structures are vertically stacked to combine light from the two more LED structures vertically, and/or horizontally and reflected upward via some reflective structures. In some embodiments, each LED structure is connected to a pixel driver and/or a common electrode. The LED structures are bonded together through bonding layers. In some embodiments, planarization layers enclose each of the LED structures or the micro multi-color LED device. In some embodiments, one or more of reflective layers, refractive layers, micro-lenses, spacers, and reflective cup structures are implemented in the device to improve the LED emission efficiency. A display panel comprising an array of the micro tri-color LED devices has a high resolution and a high illumination brightness.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: April 8, 2025
    Assignee: JADE BIRD DISPLAY (SHANGHAI) LIMITED
    Inventors: Qiming Li, Qunchao Xu, Huiwen Xu
  • Patent number: 12198769
    Abstract: An apparatus disclosed herein comprises: a plurality of memory cells and a control circuit coupled to the plurality of memory cells. The control circuit is configured to: erase a block; verify, using a first erase verify level, that the block was properly erased; verify, using a second erase verify level, that the block was properly erased; determine whether there are any mismatches in a plurality of verify statuses between neighboring wordlines of the block from verifying the block using the second erase verify level; and identify, based on the determination, whether the block has failed.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: January 14, 2025
    Inventors: Huiwen Xu, Bo Lei, Jun Wan
  • Publication number: 20240428874
    Abstract: An apparatus includes one or more control circuits that are configured to connect to a plurality of nonvolatile memory cells. The one or more control circuits are configured to detect a first boundary between written and unwritten portions of an open block and, in response to detecting the first boundary, check for a second boundary between written and unwritten portions of the open block in order to determine if the open block was subject to a non-uniform erase operation.
    Type: Application
    Filed: August 7, 2023
    Publication date: December 26, 2024
    Applicant: Western Digital Technologies, Inc.
    Inventors: Huiwen Xu, Deepanshu Dutta, Ken Oowada, Bo Lei, Ravi J. Kumar, Sujjatul Islam, Xue Pitner
  • Publication number: 20240421248
    Abstract: A micro multi-color LED device includes two or more LED structures for emitting a range of colors. The two or more LED structures are vertically stacked to combine light from the two more LED structures vertically, and/or horizontally and reflected upward via some reflective structures. In some embodiments, each LED structure is connected to a pixel driver and/or a common electrode. The LED structures are bonded together through bonding layers. In some embodiments, planarization layers enclose each of the LED structures or the micro multi-color LED device. In some embodiments, one or more of reflective layers, refractive layers, micro-lenses, spacers, and reflective cup structures are implemented in the device to improve the LED emission efficiency. A display panel comprising an array of the micro tri-color LED devices has a high resolution and a high illumination brightness.
    Type: Application
    Filed: August 26, 2024
    Publication date: December 19, 2024
    Applicant: Jade Bird Display (Shanghai) Limited
    Inventors: Qiming LI, Qunchao XU, Huiwen XU
  • Publication number: 20240357064
    Abstract: Disclosed herein is a micro LED projector comprising: a micro LED panel and a collimator unit. The micro LED structure in the micro LED panel comprises a mesa structure and a micro lens formed above the micro mesa structure, a p type semiconductor layer, an n type semiconductor layer and a light emitting layer formed between the p type semiconductor layer and the n type semiconductor layer. The center of the micro lens is at a straight line which connects the center of the light emitting layer with the center of the collimator unit. The present disclosure decreases the volume and the weight of the micro LED projector.
    Type: Application
    Filed: June 30, 2024
    Publication date: October 24, 2024
    Inventors: Shuai ZHANG, Huiwen XU, Jian GUO
  • Publication number: 20240355977
    Abstract: Disclosed herein are a micro LED structure and a micro LED projector. The micro LED structure comprises: a mesa structure and a reflective structure; wherein, the rays emitted from the sidewall of the mesa structure can be reflected by the reflective structure toward outside. The present disclosure can control the chief ray angle of the micro LED structure and reduce the loss of the light emitting from the sidewall of the mesa structure.
    Type: Application
    Filed: June 30, 2024
    Publication date: October 24, 2024
    Inventors: Jian GUO, Huiwen XU
  • Patent number: 12125537
    Abstract: The memory device includes a control circuitry that is communicatively coupled to memory cells are arranged in a plurality of word lines. The control circuitry is configured to perform a first programming pass on a selected word line. The first programming pass includes a plurality of programming loops, each of which includes the application of a programming pulse (Vpgm). The programming pulse voltage is increased between programming loops of the first programming pass by a step size. The step size is a first step size between two programming loops of the first programming pass and is a second step size that is different than the first step size between two other programming loops of the first programming pass. The control circuitry is also configured to perform a second programming pass to further program the memory cells of the selected word line to the plurality of data states.
    Type: Grant
    Filed: October 15, 2021
    Date of Patent: October 22, 2024
    Inventors: Huiwen Xu, Jun Wan, Bo Lei
  • Publication number: 20240345335
    Abstract: Disclosed herein are a micro LED display device comprising: at least one monolithic micro LED projectors, formed to generate monochrome images separately in a same color or in a different color; an optical waveguide, formed to receive the monochrome images respectively from the monolithic micro LED projectors, deliver the monochrome images and overlap the monochrome images into an objective image; wherein, the monolithic micro LED panel comprises a micro LED array, use micro LEDs for pixels; the chief ray angle of some micro LEDs are different.
    Type: Application
    Filed: June 27, 2024
    Publication date: October 17, 2024
    Inventors: Huiwen XU, Jian GUO, Shuai ZHANG
  • Publication number: 20240347520
    Abstract: Disclosed herein are a micro LED package structure and a micro LED optical module. The micro LED package structure comprises: a main circuit board, several circuit branches and several micro LED panels. The main circuit boar comprises a printed circuit for controlling the micro LED panels; the circuit branches are separately connected with the main circuit board; and, the micro LED panels are separately configured onto the end surfaces of the circuit branches. The disclosure simplifies the package structure of the micro LED, controls the chief ray angle of the micro LED structure, reduces the loss of the light emitting from the sidewall of the mesa, and further decreases the volume and the weight of the micro LED optical module.
    Type: Application
    Filed: June 27, 2024
    Publication date: October 17, 2024
    Inventors: Shuai ZHANG, Huiwen XU
  • Publication number: 20240322104
    Abstract: A micro multi-color LED device includes two or more LED structures for emitting a range of colors. The two or more LED structures are vertically stacked to combine light from the two or more LED structures. Light from the micro multi-color LED device is emitted substantially vertically upward through each of the LED structures. In some embodiments, each LED structure is connected to a pixel driver and/or a common electrode. The LED structures are bonded together through bonding layers. In some embodiments, planarization layers enclose each of the LED structures or the micro multi-color LED device. In some embodiments, one or more of reflective layers, refractive layers, micro-lenses, spacers, and reflective cup structures are implemented in the device to improve the LED emission efficiency. A display panel comprising an array of the micro tri-color LED devices has a high resolution and a high illumination brightness.
    Type: Application
    Filed: May 31, 2024
    Publication date: September 26, 2024
    Applicant: Jade Bird Display (Shanghai) Limited
    Inventors: Qunchao XU, Huiwen XU, Qiming LI
  • Patent number: 12074151
    Abstract: A micro multi-color LED device includes two or more LED structures for emitting a range of colors. The two or more LED structures are vertically stacked to combine light from the two more LED structures. Light from the micro multi-color LED device is emitted substantially vertically upward through each of the LED structures. In some embodiments, each LED structure is connected to a pixel driver and/or a common electrode. The LED structures are bonded together through bonding layers. In some embodiments, planarization layers enclose each of the LED structures or the micro multi-color LED device. In some embodiments, one or more of reflective layers, refractive layers, micro-lenses, spacers, and reflective cup structures are implemented in the device to improve the LED emission efficiency. A display panel comprising an array of the micro tri-color LED devices has a high resolution and a high illumination brightness.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: August 27, 2024
    Assignee: JADE BIRD DISPLAY (SHANGHAI) LIMITED
    Inventors: Qunchao Xu, Huiwen Xu, Qiming Li
  • Patent number: 12057169
    Abstract: The memory device that includes a memory block memory cells arranged in word lines. A controller is in electrical communication with the memory cells and is configured to program the memory cells to a first set of data states in a first programming pass and then to a greater second set of data states in a second programming pass. During programming of a first set of memory cells in at least one of the first and second programming passes, the controller is further configured to determine programming statuses of a second set of memory cells that is adjacent the first set of memory cells. The controller is further configured to read the first set of memory cells using a read voltage that is adjusted from a base read voltage based on the determined programming statuses of the second set of memory cells.
    Type: Grant
    Filed: May 18, 2022
    Date of Patent: August 6, 2024
    Inventors: Huiwen Xu, Nidhi Agrawal, Zhenni Wan, Bo Lei, Jun Wan
  • Publication number: 20240258294
    Abstract: A micro multi-color LED device includes two or more LED structures for emitting a range of colors. The two or more LED structures are vertically stacked to combine light from the two more LED structures. Light from the micro multi-color LED device is emitted horizontally from each of the LED structures and reflected upward via some reflective structures. In some embodiments, each LED structure is connected to a pixel driver and/or a common electrode. The LED structures are bonded together through bonding layers. In some embodiments, planarization layers enclose each of the LED structures or the micro multi-color LED device. In some embodiments, one or more of reflective layers, refractive layers, micro-lenses, spacers, and reflective cup structures are implemented in the device to improve the LED emission efficiency. A display panel comprising an array of the micro tri-color LED devices has a high resolution and a high illumination brightness.
    Type: Application
    Filed: March 7, 2024
    Publication date: August 1, 2024
    Applicant: Jade Bird Display (Shanghai) Limited
    Inventors: Qunchao Xu, Huiwen Xu, Qiming Li
  • Publication number: 20240258282
    Abstract: A micro-LED display panel includes a micro pixel array area having a plurality of micro pixel areas, each micro pixel area including a micro-LED. The micro-LED includes at least two light emitting layers in a vertical direction and a dielectric layer formed between adjacent ones of the light emitting layers, an IC backplane formed at a back surface of the micro-LED and configured to control the light emitting layers, and a plurality of interconnected structures configured to electrically respectively connect each light emitting layer to electrodes. The interconnected structures include one or more top interconnected structures configured to electrically connect a top of each of the light emitting layers to a first electrode, and one or more bottom interconnected structures configured to electrically connect a bottom of each of the light emitting layers to the IC backplane to a second electrode.
    Type: Application
    Filed: January 26, 2024
    Publication date: August 1, 2024
    Inventors: Huiwen XU, Qiming LI, Jian GUO, Qunchao XU
  • Publication number: 20240257881
    Abstract: The adaptive erase scheme includes erasing the memory cells of a selected memory block in at least one erase loop. During the at least one erase loop, simultaneously, an erase voltage is applied to a plurality of channels in the selected memory block, a first bias voltage is applied to the plurality of word lines of the first sub-block, and a second bias voltage is applied to the plurality of word lines of the second sub-block. The first bias voltage is different than the second bias voltage so that the memory cells of the first and second sub-blocks are erased at different speeds.
    Type: Application
    Filed: July 17, 2023
    Publication date: August 1, 2024
    Applicant: Western Digital Technologies, Inc.
    Inventors: Huiwen Xu, Bo Lei
  • Patent number: 12046279
    Abstract: A controller is configured to program the memory cells to a first set of data states in a first programming pass and to a greater second set of data states in a second programming pass. The controller performs the first programming pass on the first word line. The controller then repeats the process of programming a portion of another word line and then comparing an upper tail of an erased data state of the first word line to a critical voltage until the upper tail of the erased data state of the first word line exceeds the critical voltage by a threshold. In response to the upper tail of the erased data state exceeding the critical voltage by the threshold, the controller then alternates between the first and second programming passes until the first programming pass is completed on the remaining word lines of the memory block.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: July 23, 2024
    Assignee: SanDisk Technologies LLC
    Inventors: Huiwen Xu, Jun Wan, Bo Lei
  • Publication number: 20240242764
    Abstract: The memory device includes a plurality of hybrid memory blocks that can operate in either a single bit per memory cell mode or a multiple bits per memory cell mode. The memory blocks each include a plurality of memory cells, which are arranged in a plurality of word lines. Control circuitry is configured to program a selected word line to an SLC format. The control circuitry is further configured to determine which zone within the selected hybrid memory block the selected word line is located in and set an SLC programming voltage to a level based on the determination of the zone of the selected word line. The control circuitry is further configured to apply a programming pulse at the SLC programming voltage to the selected word line to program the memory cells of the selected word line.
    Type: Application
    Filed: July 17, 2023
    Publication date: July 18, 2024
    Applicant: SanDisk Technologies LLC
    Inventors: Huiwen Xu, Deepanshu Dutta, Jia Li, Bo Lei, Ken Oowada
  • Patent number: 12027509
    Abstract: A micro multi-color LED device includes two or more LED structures for emitting a range of colors. The two or more LED structures are vertically stacked to combine light from the two more LED structures. Light from the micro multi-color LED device is emitted substantially vertically upward through each of the LED structures. In some embodiments, each LED structure is connected to a pixel driver and/or a common electrode. The LED structures are bonded together through bonding layers. In some embodiments, planarization layers enclose each of the LED structures or the micro multi-color LED device. In some embodiments, one or more of reflective layers, refractive layers, micro-lenses, spacers, and reflective cup structures are implemented in the device to improve the LED emission efficiency. A display panel comprising an array of the micro tri-color LED devices has a high resolution and a high illumination brightness.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: July 2, 2024
    Assignee: JADE BIRD DISPLAY (SHANGHAI) LIMITED
    Inventors: Qunchao Xu, Huiwen Xu, Qiming Li
  • Publication number: 20240212768
    Abstract: A non-volatile memory system detects an indication of erase depth of a population of memory cells and adjusts the programming process for the memory cells based on the detected erase depth.
    Type: Application
    Filed: July 24, 2023
    Publication date: June 27, 2024
    Applicant: SanDisk Technologies LLC
    Inventors: Huiwen Xu, Deepanshu Dutta, Bo Lei
  • Patent number: 11967589
    Abstract: A micro multi-color LED device includes two or more LED structures for emitting a range of colors. The two or more LED structures are vertically stacked to combine light from the two more LED structures. Light from the micro multi-color LED device is emitted horizontally from each of the LED structures and reflected upward via some reflective structures. In some embodiments, each LED structure is connected to a pixel driver and/or a common electrode. The LED structures are bonded together through bonding layers. In some embodiments, planarization layers enclose each of the LED structures or the micro multi-color LED device. In some embodiments, one or more of reflective layers, refractive layers, micro-lenses, spacers, and reflective cup structures are implemented in the device to improve the LED emission efficiency. A display panel comprising an array of the micro tri-color LED devices has a high resolution and a high illumination brightness.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: April 23, 2024
    Assignee: Jade Bird Display (Shanghai) Limited
    Inventors: Qunchao Xu, Huiwen Xu, Qiming Li