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).

  • Patent number: 11708368
    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: Grant
    Filed: February 13, 2019
    Date of Patent: July 25, 2023
    Assignee: JIANGSU NHWALUOKANG PHARMACEUTICAL RESEARCH AND DEVELOPMENT CO., LTD.
    Inventors: Qingeng Li, Chen Duan, Tao Wang, Jian Liao, Changwen Li, Chao Hao
  • Patent number: 11709393
    Abstract: A light-emitting diode (LED) and a backlight-type display device are provided. The light-emitting diode includes: a multi-color light emitting chip, an emission spectrum thereof including a first peak in a wavelength range of a first primary-color light and a second peak in a wavelength range of a second primary-color light, and an absolute value of a wavelength difference between the first and second peaks being greater than 50 nm; and a phosphor-containing layer, disposed over the multi-color light emitting chip and used to be excited to emit a third primary-color light. Owing to the LED adopts the multi-color light emitting chip which has the first and second peaks in different wavelength ranges and the absolute valve of the wavelength difference is greater than 50 nm, RGB three-primary-color lights can be outputted by adopting a single-color light phosphor powder with relatively high reliability. The backlight-type display device can obtain a high NTSC level.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: July 25, 2023
    Assignee: KAISTAR LIGHTING (XIAMEN) CO., LTD.
    Inventors: Jingqiong Zhang, Changwen Liao
  • Publication number: 20230120135
    Abstract: Example running status switching methods, apparatuses, active/standby management systems, and network systems are described herein. One example method includes a first management apparatus determining a connection status corresponding to at least one reference apparatus managed by an active/standby management system, and then switching between an active state and a standby state based on the connection status corresponding to the at least one reference apparatus. The connection status corresponding to the reference apparatus includes a connection status between the at least one reference apparatus and at least one management apparatus in the active/standby management system, and the at least one management apparatus includes the first management apparatus. The management apparatus can switch the running status of the management apparatus without relying on a third-party apparatus.
    Type: Application
    Filed: December 20, 2022
    Publication date: April 20, 2023
    Inventor: Changwen Hu
  • Publication number: 20230034906
    Abstract: Disclosed are a monoclonal antibody that is specific to human cytomegalovirus and binds to human cytomegalovirus with a high affinity, or an antigen-binding fragment thereof, and a method for preparing the antibody. The antibody is also highly effective in neutralizing infections. Also disclosed are an epitope to which the antibody binds, and the use of the antibody in the diagnosis, prevention and treatment of an infected individual.
    Type: Application
    Filed: December 4, 2020
    Publication date: February 2, 2023
    Applicant: Trinomab Biotech Co., Ltd.
    Inventors: Huaxin LIAO, Yueming WANG, Changwen WU, Weihong ZHENG
  • Publication number: 20220304393
    Abstract: A heating method of a vaporizer includes: obtaining, in real time, a sampling value of a thermal property of a heating element in the vaporizer upon detecting a trigger operation; determining, at a current moment, whether the vaporizer reaches thermal equilibrium according to the sampling value obtained; upon determining that the vaporizer reaches thermal equilibrium, taking the sampling value of the thermal property of the heating element when thermal equilibrium is reached as a stable value, controlling a difference value between the sampling value of the heating element and the stable value to be within a first range, and obtaining a first output power of the vaporizer in real time; and stopping heating the heating element when the first output power is less than a first power threshold.
    Type: Application
    Filed: June 14, 2022
    Publication date: September 29, 2022
    Inventors: Changwen SUN, Weiming FANG
  • Patent number: 11372439
    Abstract: A pedal apparatus for a vehicle includes a rotary arm provided in a pedal housing and configured to rotate with respect to a rotational axis by an operating force applied to a pedal pad; a magnet whose position is changed as the rotary arm rotates; a position detector configured for detecting a position of the rotary arm as the rotary arm rotates. The position detector includes: a sensor configured for sensing a strength of a magnetic field generated by the magnet; and a plurality of shield portions arranged to have different distances from the magnet, shielding the magnetic field generated by each of the magnet from an external magnetic field source.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: June 28, 2022
    Assignee: SL Corporation
    Inventors: Changwen An, Taejo Kim
  • Patent number: 11353747
    Abstract: A backlight module and a liquid crystal display are provided. The backlight module has a substrate, a plurality of soldering pads, and a reflective pattern layer. The soldering pads are distributed on the substrate and each of the soldering pads has a soldering pad size. The reflective pattern layer covers the soldering pads and the substrate. The reflective pattern layer has openings, positions of the openings correspond to positions of the soldering pads, each of the openings has an opening size, and the opening size is smaller than the corresponding soldering pad size. The backlight module is provided with the openings in the reflective pattern corresponding to the positions of the soldering pads, and the opening size of the openings is smaller than the soldering pad size of the soldering pads, thereby increasing a ratio of the reflective pattern layer to the substrate. Therefore, brightness is improved.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: June 7, 2022
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Guowei Zha, Changwen Ma
  • Publication number: 20220128861
    Abstract: A light-emitting diode (LED) and a backlight-type display device are provided. The light-emitting diode includes: a multi-color light emitting chip, an emission spectrum thereof including a first peak in a wavelength range of a first primary-color light and a second peak in a wavelength range of a second primary-color light, and an absolute value of a wavelength difference between the first and second peaks being greater than 50 nm; and a phosphor-containing layer, disposed over the multi-color light emitting chip and used to be excited to emit a third primary-color light. Owing to the LED adopts the multi-color light emitting chip which has the first and second peaks in different wavelength ranges and the absolute valve of the wavelength difference is greater than 50 nm, RGB three-primary-color lights can be outputted by adopting a single-color light phosphor powder with relatively high reliability. The backlight-type display device can obtain a high NTSC level.
    Type: Application
    Filed: October 12, 2021
    Publication date: April 28, 2022
    Inventors: Jingqiong Zhang, Changwen Liao
  • Publication number: 20220122371
    Abstract: A display panel is provided, comprising a backlight module, a first substrate, a liquid crystal layer, a second substrate, and a glass cover, wherein the second substrate comprises a fingerprint identification layer configured for identifying information from a fingerprint of a user. The second substrate provided with the fingerprint identification layer is disposed close to the glass cover, making the fingerprint identification layer closer to the fingerprint of the user, shortening a path of the light reflected by the fingerprint to the fingerprint identification sensors, and improving fingerprint identification effectiveness.
    Type: Application
    Filed: March 27, 2020
    Publication date: April 21, 2022
    Inventors: Zhou ZHANG, Changwen MA, Pan XU
  • Publication number: 20220100222
    Abstract: A pedal apparatus for a vehicle includes a rotary arm provided in a pedal housing and configured to rotate with respect to a rotational axis by an operating force applied to a pedal pad; a magnet whose position is changed as the rotary arm rotates; a position detector configured for detecting a position of the rotary arm as the rotary arm rotates. The position detector includes: a sensor configured for sensing a strength of a magnetic field generated by the magnet; and a plurality of shield portions arranged to have different distances from the magnet, shielding the magnetic field generated by each of the magnet from an external magnetic field source.
    Type: Application
    Filed: August 23, 2021
    Publication date: March 31, 2022
    Inventors: Changwen AN, Taejo KIM
  • Patent number: 11274714
    Abstract: An electromagnetic braking system and control method, with the system having a CCU, a braking cylinder, a push rod, an electromagnetic braking ring, an electromagnetic braking piston fixed to the push rod, a first shading plate and a second shading plate, a photoelectric sensor fixed near the push rod, and an electromagnetic braking control circuit, and the control method including following the steps: initial estimating of the braking distance (l) according to the current magnitude, electromagnetic force between the two electromagnetic coils and initial velocity (v) of the push rod, arranging a restoration distance (?l) between the top dead center and the piston after braking, installing two shading plates and the photoelectric sensor; and setting the distance between the two electromagnetic coils to when the starts braking.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: March 15, 2022
    Assignee: Tianjin University
    Inventors: Jiaying Pan, Lei Wang, Haiqiao Wei, Gequn Shu, Changwen Liu, Guobin Ma
  • Patent number: 11265036
    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: Grant
    Filed: May 7, 2020
    Date of Patent: March 1, 2022
    Assignee: ONEPLUS TECHNOLOGY (SHENZHEN) CO., LTD.
    Inventors: Jianzhang Hou, Changwen Zhou
  • Publication number: 20220058360
    Abstract: A liquid crystal display device, including a fingerprint identification module, a backlight module, a liquid crystal display panel, and a cover plate; the fingerprint identification module has an infrared emitter, an infrared receiver, and a fingerprint optical film. The infrared emitter is positioned at a side of the fingerprint optical film, the infrared receiver is attached to a lower surface of the fingerprint optical film and completely covers the fingerprint optical film, and the infrared receiver is a glass substrate optical readout infrared sensor.
    Type: Application
    Filed: March 27, 2020
    Publication date: February 24, 2022
    Applicant: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Zhou ZHANG, Pan XU, Changwen MA
  • Publication number: 20210324926
    Abstract: The present invention discloses an electromagnetic braking system and control method, the system comprises a CCU, a braking cylinder, a push rod, an electromagnetic braking ring, an electromagnetic braking piston fixed to the push rod, a first shading plate and a second shading plate, a photoelectric sensor fixed near the push rod, and an electromagnetic braking control circuit. The control method includes following steps: initial estimating the braking distance l according to the current magnitude, electromagnetic force between the two electromagnetic coils and initial velocity v of the push rod, arranging a restoration distance ?l between the top dead center and the piston after braking, installing two shading plates and the photoelectric sensor; setting the distance between the two electromagnetic coils to L=l+?l when starting the braking.
    Type: Application
    Filed: March 8, 2019
    Publication date: October 21, 2021
    Applicant: Tianjin University
    Inventors: Jiaying PAN, Lei WANG, Haiqiao WEI, Gequn SHU, Changwen LIU, Guobin MA
  • Publication number: 20210313679
    Abstract: Disclosed are an antenna system, a mobile terminal, and an antenna system switching method. The antenna system includes: at least one switch and a plurality of antenna units; wherein each of the at least one switch is configured to switch connection states of the plurality of antenna units to cause at least one of the plurality of antenna units in a connected state to generate beams and perform scanning in space.
    Type: Application
    Filed: June 18, 2021
    Publication date: October 7, 2021
    Inventors: Yongwei ZHONG, Jiangbo GU, Changwen ZHOU
  • Publication number: 20210292250
    Abstract: A metal-organic framework material fertilizer and a preparation method therefor is provided. The novel fertilizer consists of nutrient molecules and external frameworks thereof, and is characterized in that the external frameworks are formed by coordination of inorganic metal ion clusters to organic joints under hydrothermal conditions. The metal-organic framework materials include two types, i.e., zinc-free and zinc-containing. The hydrothermal synthesis conditions of the novel metal-organic framework material fertilizer are that: the reaction temperature is 100° C., the reaction time is 24 h, the heating rate of the reactor is 2° C./min, and the speed of the stir bar is 120 revolutions per minute. The nutrient contents of the novel fertilizer are as follows: compound I: N: 4-5%, and P: 16-20%; and compound II: N: 5-7%, P: 15-18%, and Zn: 2-3%.
    Type: Application
    Filed: December 4, 2018
    Publication date: September 23, 2021
    Inventors: Changwen DU, Ke WU
  • Publication number: 20210295750
    Abstract: A special-shaped display panel and a display device are provided. The special-shaped display panel includes a display region provided for displaying images, the display region having a notch after special-shaped cutting; and a non-display region including a peripheral layout region and a notch region corresponding to the notch of the display region, wherein the display region is divided into a plurality of common electrode regions according to extension of at least one edge of the notch region, at least two of the plural common electrode regions have different common voltage configurations. Mura effect and display quality are improved.
    Type: Application
    Filed: September 12, 2018
    Publication date: September 23, 2021
    Applicant: Wuhan China Star Optoelectronics Technology Co.Ltd.
    Inventors: Zhou ZHANG, Yucheng TSAI, Changwen MA, Pan XU
  • Publication number: 20210278726
    Abstract: A backlight module and a liquid crystal display are provided. The backlight module has a substrate, a plurality of soldering pads, and a reflective pattern layer. The soldering pads are distributed on the substrate and each of the soldering pads has a soldering pad size. The reflective pattern layer covers the soldering pads and the substrate. The reflective pattern layer has openings, positions of the openings correspond to positions of the soldering pads, each of the openings has an opening size, and the opening size is smaller than the corresponding soldering pad size. The backlight module is provided with the openings in the reflective pattern corresponding to the positions of the soldering pads, and the opening size of the openings is smaller than the soldering pad size of the soldering pads, thereby increasing a ratio of the reflective pattern layer to the substrate. Therefore, brightness is improved.
    Type: Application
    Filed: December 26, 2018
    Publication date: September 9, 2021
    Inventors: Guowei ZHA, Changwen MA
  • Patent number: 11106078
    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: Grant
    Filed: October 17, 2019
    Date of Patent: August 31, 2021
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Zhou Zhang, Changwen Ma, Pan Xu
  • Patent number: 11092849
    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: Grant
    Filed: September 11, 2018
    Date of Patent: August 17, 2021
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNLOGY CO., LTD.
    Inventors: Changwen Ma, Guowei Zha, Zhou Zhang