Patents by Inventor Changwen An

Changwen An 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).

  • Publication number: 20210223630
    Abstract: The present invention discloses a light emitting diode (LED) backlight device and LED display device, including a plurality of backlight partitions; a reflective material layer covering a surface of the backlight substrate; a plurality of metal traces disposed within the backlight partitions and disposed between the backlight substrate and the reflective material layer; a plurality of pad openings penetrating from a surface of the reflective material layer to a surface of the metal traces. An orthographic projection of the pad openings projected toward the backlight substrate is completely within an area of the metal traces; and a plurality of solder paste application regions located in the pad openings. The LED display device assembled by the LED backlight device according to the present invention improves the yield of solder paste printing and die bonding, improves the light reflection, reduces the loss of light energy, and improves the light efficiency.
    Type: Application
    Filed: September 11, 2018
    Publication date: July 22, 2021
    Inventors: Changwen MA, Guowei ZHA, Zhou ZHANG
  • Patent number: 10984215
    Abstract: A method of recognizing a fingerprint is implemented by dividing a sensor matrix of a mobile terminal into a plurality of blocks by rows. Each of the blocks is under control of an independent switch terminal. When performing fingerprint unlocking, only an area covered by the fingerprint is being scanned, while an area not covered by the fingerprint is not to be scanned, thereby significantly reducing a scanning area, shortening a scanning time, improving unlocking efficiency, fulfilling fast fingerprint unlocking, and reducing power consumption. A mobile terminal is also provided and includes a multiplexer configured to divide the sensor matrix into a plurality of blocks. Each of the blocks can independently perform fingerprint recognition scanning. When fingerprint unlocking is carried out, there is no need to scan an entire area of the sensor matrix, thereby improving unlocking efficiency and saving electric energy.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: April 20, 2021
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Zhou Zhang, Yucheng Tsai, Changwen Ma, Pan Xu
  • Patent number: 10976766
    Abstract: A pedal device for a vehicle includes a pedal arm that is rotatable about a rotational axis in a pedal housing, a pedal reaction force generator for generating a pedal reaction force in a direction opposite to a direction in which an operating force of the pedal arm is applied via a pedal pad formed on the pedal arm, a friction force generator comprising a contact disposed at an end of the pedal arm proximate to the rotational axis and a contact surface formed on an inner surface of the pedal housing to be in contact with the contact of the pedal arm, and a position detection unit for detecting a position of the pedal arm. The position detection unit includes a magnet, in which two or more poles are arranged in a displacement direction and in a direction perpendicular to the displacement direction.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: April 13, 2021
    Assignee: SL Corporation
    Inventors: Woojin Kang, Changwen An, Intae Hwang
  • Publication number: 20210030070
    Abstract: An electronic atomization device is disclosed, including: an atomization unit, configured to heat liquid in the electronic atomization device to atomize the liquid; and a control unit, configured to: send a PWM control signal to the atomization unit, and the PWM control signal is configured to control the atomization unit to heat at a constant temperature kept to the target temperature; calculate the effective output power of the atomization unit; determine whether the oil content of the atomization unit is abnormal according to the effective output power; and control the atomization unit to output the reduced power or stop heating, when it is determined that the oil content of the atomization unit is abnormal.
    Type: Application
    Filed: July 29, 2020
    Publication date: February 4, 2021
    Inventors: Changwen SUN, Weiming FANG, Zhenggen DAI, Jun ZHOU, Xinyu WANG, Xin ZHANG, Wenjie DONG, Lijun KANG
  • Publication number: 20210033918
    Abstract: A display panel and a display device are provided. The display panel includes an array substrate, a color filter substrate, and a liquid crystal layer disposed between the array substrate and the color filter substrate. The array substrate includes at least one transparent support column for supporting the array substrate and the color filter substrate to form the liquid crystal layer, and at least one fingerprint sensor disposed at a position corresponding to the transparent support column. The display device includes the display panel.
    Type: Application
    Filed: October 17, 2019
    Publication date: February 4, 2021
    Inventors: Zhou ZHANG, Changwen MA, Pan XU
  • Publication number: 20210002283
    Abstract: The present invention provides a crystalline form of a benzodiazepine derivative hydrochloride of Formula I or its ethanolate, wherein R is methyl or ethyl. The present invention also provides a method of preparing the crystal form of the compound of Formula I and a pharmaceutical composition comprising the crystal form.
    Type: Application
    Filed: February 13, 2019
    Publication date: January 7, 2021
    Inventors: Qingeng Li, Chen Duan, Tao Wang, Jian Liao, Changwen LI, Chao Hao
  • Patent number: 10887657
    Abstract: A message transmission method is provided. A processor that implements a first client, corresponding to a first account, determines a second account which performs message interaction with the first account, the second account corresponding to a second client. The first client transmits to the second client a preset link that is usable for playing a target media file at the second client, the target media file being currently played at the first client. The first client transmits and receives a message between the first account and the second account based on the target media file being played at the first client and the second client, the message being displayed on a first preset page of the first client.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: January 5, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Xiaomin Chen, Bing Li, Changwen Yuan
  • Patent number: 10824008
    Abstract: The present disclosure provides backlight module and display module. The backlight module may include: a display module and a backlight module, the backlight module is configured to face to the display module, the display module may include a first substrate, a second substrate and a liquid crystal layer interposed between the first substrate and the second substrate; the display module comprising a display region and a non-display region, at least one side of the second substrate extends along the non-display region and is bent below the backlight module so as to cover a portion of the backlight module.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: November 3, 2020
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Guowei Zha, Hongqing Cui, Changwen Ma, Yan Cheng
  • Patent number: 10816850
    Abstract: The present invention teaches a direct-lit backlight module and a related manufacturing method. The direct-lit backlight module includes a driver substrate, a reflection layer on the driver substrate, multiple mini-LEDs arranged in an array on the reflection layer, multiple reflection bumps on the reflection layer among the mini-LEDs, and an optical film set on the reflection layer, the mini-LEDs, and the reflection bumps. The mini-LEDs are electrically connected to the driver substrate. The reflection bumps jointly form a mesh dot structure. When light passes through the mesh dot structure, the light is scattered by the mesh dot structure to various directions, thereby enhancing the lighting efficiency of the direct-lit backlight module.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: October 27, 2020
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Guowei Zha, Changwen Ma
  • Publication number: 20200320939
    Abstract: The invention provides an LCD, comprising a MINI LED substrate, a plurality of MINI LED chips disposed on one side of the MINI LED substrate, a MINI LED driving IC disposed on the other side of the MINI LED substrate, and a fluorescent film covering the plurality of MINI LED chips, the MINI LED driving IC driving the plurality of MINI LED chips to emit light. Compared to the prior art, the invention, without disposing the MINILED driving IC in FPCA, saves a connector, avoids the design space reduction in FPCA, and effectively reduces the routing difficulty of MINI LED driving IC and the plurality of MINI LED chips, thereby reduces the manufacturing cost.
    Type: Application
    Filed: September 22, 2018
    Publication date: October 8, 2020
    Inventors: Changwen Ma, Guowei Zha, Zhou Zhang
  • Patent number: 10782576
    Abstract: An array substrate and a driving method thereof are provided. The method includes transmitting a source signal to a data line, wherein the source signal includes a first time period, a second time period, and a third time period; wherein the first time period is configured to be used by a thin film transistor of a sub-pixel unit to charge a display of a display electrode, the second time period is a touch period, and the third time period is configured to charge the common electrode through switching the switch.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: September 22, 2020
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yucheng Tsai, Zhou Zhang, Changwen Ma, Pan Xu
  • Publication number: 20200293079
    Abstract: A pedal device for a vehicle includes a pedal arm that is rotatable about a rotational axis in a pedal housing, a pedal reaction force generator for generating a pedal reaction force in a direction opposite to a direction in which an operating force of the pedal arm is applied via a pedal pad formed on the pedal arm, a friction force generator comprising a contact disposed at an end of the pedal arm proximate to the rotational axis and a contact surface formed on an inner surface of the pedal housing to be in contact with the contact of the pedal arm, and a position detection unit for detecting a position of the pedal arm. The position detection unit includes a magnet, in which two or more poles are arranged in a displacement direction and in a direction perpendicular to the displacement direction.
    Type: Application
    Filed: March 10, 2020
    Publication date: September 17, 2020
    Inventors: Woojin KANG, Changwen An, Intae Hwang
  • Publication number: 20200266849
    Abstract: A self-tuning method can be applied to a self-tuning system and a mobile terminal. In the method, an actual performance index value of the self-tuning system in a current use environment is acquired; when it is determined that a difference between the actual performance index value and a preset performance index value in a current use environment is greater than a preset value, the self-tuning system is controlled to perform tuning until the self-tuning system finishes the tuning of all states thereof, so as to obtain a reflection signal corresponding to each of the states; each reflected signal is compared with a radio frequency signal received by the self-tuning system respectively, so as to obtain a comparison result; and a tuning parameter, within a first preset range, corresponding to the comparison result is determined as the tuning parameter of the self-tuning system in the current use environment.
    Type: Application
    Filed: May 7, 2020
    Publication date: August 20, 2020
    Applicant: ONEPLUS TECHNOLOGY (SHENZHEN) CO., LTD.
    Inventors: Jianzhang HOU, Changwen ZHOU
  • Patent number: 10739630
    Abstract: A touch display panel and a touch display device are provided. The touch display panel, comprising an array substrate and a color filter substrate are cell-assembled, and a liquid crystal layer positioned between the array substrate and the color filter substrate. The array substrate includes a first substrate, a black matrix layer, a touch sensing layer, a first electrode layer and a pixel electrode layer are sequentially positioned, the pixel electrode layer is nearby the liquid crystal layer, the first substrate layer is positioned on a side of the pixel electrode which far away the liquid crystal layer. The touch display panel using the first substrate for controlling the touch display panel displays image while touch, the touch electrode field and driving electrode file in the touch display panel are not effect to each other, such that avoids to decrease resolution of touch display panel.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: August 11, 2020
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yucheng Tsai, Zhou Zhang, Pan Xu, Changwen Ma
  • Publication number: 20200183238
    Abstract: An array substrate and a driving method thereof are provided. The method includes transmitting a source signal to a data line, wherein the source signal includes a first time period, a second time period, and a third time period; wherein the first time period is configured to be used by a thin film transistor of a sub-pixel unit to charge a display of a display electrode, the second time period is a touch period, and the third time period is configured to charge the common electrode through switching the switch.
    Type: Application
    Filed: November 23, 2018
    Publication date: June 11, 2020
    Inventors: Yucheng TSAI, Zhou ZHANG, Changwen MA, Pan XU
  • Patent number: 10594672
    Abstract: System and methods are provided for admission to networks that include at least one node providing network coordinator functions. A network coordinator may have a random number generator, with the network coordinator distributing a random number within a network that include at least a first node and a second node. The network coordinator may receive a request for a dynamic encryption key from the first node, with the request being encrypted using a static encryption key unique to the first node, and with the static encryption key being determined based on the distributed random number. The network coordinator may then send a dynamic encryption key to the first node, with the dynamic encryption key being encrypted using the static encryption key. The second node may then admit the first node into the network. The network may be a Multimedia over Coax Alliance (MoCA®) network.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: March 17, 2020
    Assignee: ENTROPIC COMMUNICATIONS, LLC
    Inventors: Changwen Liu, Ronald B. Lee
  • Publication number: 20190387629
    Abstract: A display panel is provided, which comprises a display module, a flexible connection board, a driver IC, and a passive component. The display module is electrically connected to the flexible connection board, the driver IC is disposed on the flexible connection board, and the passive component is disposed inside the driver IC. A display is also provided, which comprises a display panel and a circuit board. The display panel comprises a display module, a flexible connection board, a driver IC, and a passive component. The display module is electrically connected to the flexible connection board, the driver IC is disposed on the flexible connection board, and the passive component is disposed inside the driver IC or on the circuit board.
    Type: Application
    Filed: December 19, 2017
    Publication date: December 19, 2019
    Inventors: Zhou ZHANG, Yucheng TSAI, Pan XU, Changwen MA
  • Patent number: 10462511
    Abstract: Provided are a method, a device and a system for presenting information. The method includes: acquiring at least one preset information presentation time point in a video to be played and a pre-stored presentation information set associated with video content at the information presentation time point, where the presentation information set corresponds to the information presentation time point in a one-to-one manner; selecting to-be-presented information from the presentation information set corresponding to the information presentation time point based on historical browsing information, to obtain the to-be-presented information corresponding to the information presentation time point; and sending the to-be-presented information corresponding to the information presentation time point to a terminal.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: October 29, 2019
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Junzhi Gao, Bin Zhou, Ao Peng, Yiting Zhang, Suibin Yao, Hao Hu, Changwen Yuan, Xiaokang Yuan, Xing Li, Shaolin Bai, Kunxian Wang, Quanzhen Jiang, Jie Qi
  • Publication number: 20190324322
    Abstract: The present invention teaches a direct-lit backlight module and a related manufacturing method. The direct-lit backlight module includes a driver substrate, a reflection layer on the driver substrate, multiple mini-LEDs arranged in an array on the reflection layer, multiple reflection bumps on the reflection layer among the mini-LEDs, and an optical film set on the reflection layer, the mini-LEDs, and the reflection bumps. The mini-LEDs are electrically connected to the driver substrate. The reflection bumps jointly form a mesh dot structure. When light passes through the mesh dot structure, the light is scattered by the mesh dot structure to various directions, thereby enhancing the lighting efficiency of the direct-lit backlight module.
    Type: Application
    Filed: September 14, 2018
    Publication date: October 24, 2019
    Inventors: Guowei Zha, Changwen Ma
  • Patent number: D889382
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: July 7, 2020
    Inventor: Changwen Lan