Patents by Inventor Chih-Jen Cheng

Chih-Jen Cheng 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: 11955705
    Abstract: A multi-input multi-output antenna system capable of being disposed in an electronic device and the electronic device including the antenna system have a low-frequency antenna assembly and a high-frequency antenna assembly. The low-frequency antenna assembly includes multiple low-frequency antennas that are spaced apart from each other by a distance. The high-frequency antenna assembly includes multiple high-frequency antennas that are spaced apart from each other by a distance. One of the high-frequency antennas is structured as a low-profile dish antenna and is located between the low-frequency antennas, so that the antenna system has smaller volume and height, and better isolation and radiation patterns.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: April 9, 2024
    Assignee: Alpha Networks Inc.
    Inventors: De-Chang Su, Chih Jen Cheng
  • Patent number: 11870126
    Abstract: A multi-input multi-output (MIMO) antenna system includes a metal plate, a background scanning antenna, a plurality of working antennas, and an isolator module. The isolator module is mountable on the metal plate and includes a plurality of isolators that are in a ring configuration to form an isolated space therein, so that the background scanning antenna can be located in the isolated space and a plurality of working antennas are located outside of the isolated space, thereby ensuring good isolation of the background scanning antenna from the working antennas by the design of the isolator module.
    Type: Grant
    Filed: February 9, 2022
    Date of Patent: January 9, 2024
    Assignee: Alpha Networks Inc.
    Inventors: Kuang Wei Lin, Chih Jen Cheng
  • Patent number: 11777205
    Abstract: A periodic metal array structure can be disposed between two antenna modules and include rows of metal unit assemblies that each includes metal units connected to each other in a longitudinal direction. Each metal unit has a first longitudinal strip, two first transverse strips, two second transverse strips, and two second longitudinal strips having shorter longitudinal lengths than that of the first longitudinal strip, and being respectively disposed on the left and right sides of the first longitudinal strip and respectively spaced apart therefrom by intervals at which the second transverse strips are located. The top and bottom ends of the first longitudinal strip are respectively connected with the first transverse strips. At least one first transverse strip can be connected to a first transverse strip of an adjacent metal unit. Each second transverse strip can be connected to the first longitudinal strip and a corresponding second longitudinal strip.
    Type: Grant
    Filed: March 15, 2022
    Date of Patent: October 3, 2023
    Assignee: Alpha Networks Inc.
    Inventors: Chih Jen Cheng, Guan-Ting Chen, Shu Min Fang
  • Patent number: 11703705
    Abstract: A liquid crystal display panel includes a first transparent glass layer; a second transparent glass layer overlapping the first transparent glass layer; two or more pixel units disposed on a side of the first transparent glass layer opposite to the second transparent glass layer, each of the pixel units including a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel arranged in accordance with a predetermined rule; a black matrix disposed between the pixel units to isolate two pixel units adjacent to each other; and a fingerprint sensor disposed on the second transparent glass layer, and covered by the black matrix; when the fingerprint sensor is viewed from the top, an area of the fingerprint sensor corresponding to a region of the red sub-pixels is larger than any one of areas of the fingerprint sensors corresponding to respective regions of the green, blue, and white sub-pixels.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: July 18, 2023
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventors: Chih-jen Cheng, Che-jui Hsu, Tsang-chih Wu
  • Publication number: 20230140166
    Abstract: A periodic metal array structure can be disposed between two antenna modules and include rows of metal unit assemblies that each includes metal units connected to each other in a longitudinal direction. Each metal unit has a first longitudinal strip, two first transverse strips, two second transverse strips, and two second longitudinal strips having shorter longitudinal lengths than that of the first longitudinal strip, and being respectively disposed on the left and right sides of the first longitudinal strip and respectively spaced apart therefrom by intervals at which the second transverse strips are located. The top and bottom ends of the first longitudinal strip are respectively connected with the first transverse strips. At least one first transverse strip can be connected to a first transverse strip of an adjacent metal unit. Each second transverse strip can be connected to the first longitudinal strip and a corresponding second longitudinal strip.
    Type: Application
    Filed: March 15, 2022
    Publication date: May 4, 2023
    Applicant: Alpha Networks Inc.
    Inventors: Chih Jen CHENG, Guan-Ting CHEN, Shu Min FANG
  • Publication number: 20230051848
    Abstract: A multi-input multi-output antenna system capable of being disposed in an electronic device and the electronic device including the antenna system have a low-frequency antenna assembly and a high-frequency antenna assembly. The low-frequency antenna assembly includes multiple low-frequency antennas that are spaced apart from each other by a distance. The high-frequency antenna assembly includes multiple high-frequency antennas that are spaced apart from each other by a distance. One of the high-frequency antennas is structured as a low-profile dish antenna and is located between the low-frequency antennas, so that the antenna system has smaller volume and height, and better isolation and radiation patterns.
    Type: Application
    Filed: June 13, 2022
    Publication date: February 16, 2023
    Applicant: Alpha Networks Inc.
    Inventors: De-Chang SU, Chih Jen CHENG
  • Publication number: 20220416413
    Abstract: A multi-input multi-output (MIMO) antenna system includes a metal plate, a background scanning antenna, a plurality of working antennas, and an isolator module. The isolator module is mountable on the metal plate and includes a plurality of isolators that are in a ring configuration to form an isolated space therein, so that the background scanning antenna can be located in the isolated space and a plurality of working antennas are located outside of the isolated space, thereby ensuring good isolation of the background scanning antenna from the working antennas by the design of the isolator module.
    Type: Application
    Filed: February 9, 2022
    Publication date: December 29, 2022
    Applicant: Alpha Networks Inc.
    Inventors: KUANG WEI LIN, CHIH JEN CHENG
  • Patent number: 11527093
    Abstract: An electronic apparatus, includes: a display screen, a reflector and a sensor, wherein a region of the display screen located on a front surface of the electronic apparatus is a first display region, a region of the display screen located on a back surface of the electronic apparatus is a second display region, and the display screen is configured to transmit light; the reflector and the sensor are arranged inside the electronic apparatus, and light transmitted from the first display region or the second display region is reflected by the reflector and then irradiated on the sensor; and the sensor generates an electric signal for fingerprint identification based on the light received. Sharing the sensor under the display screen can therefore be realized, with a single sensor to implement fingerprint collection and identification of a multi-surface display device.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: December 13, 2022
    Assignees: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD. NANJING BRANCH, BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventors: Chih-Jen Cheng, Zhongsheng Jiang, Di Wang
  • Patent number: 11514710
    Abstract: Provided are a display panel and a terminal device. The display panel includes: a display array including a plurality of display portions, the display portion including at least one display subportion; and a plurality of image detectors configured to detect photo signals to obtain a target detection image, the plurality of image detectors being adjacent to the plurality of display portions and having first distribution positions and second distribution positions, the first distribution positions being different from the second distribution positions. The plurality of image detectors are distributed at different distribution positions at the adjacent positions of the plurality of display portions of the display array in different distribution manners.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: November 29, 2022
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventor: Chih-jen Cheng
  • Patent number: 11422040
    Abstract: 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: Grant
    Filed: September 20, 2017
    Date of Patent: August 23, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Chih Jen Cheng, Lijun Zhao
  • Patent number: 11417141
    Abstract: An in-screen fingerprint identification apparatus includes a display panel and a fingerprint identification module. The display panel includes a backlight module, a liquid crystal layer, and a cover glass, which are sequentially stacked. The cover glass includes a fingerprint identification area. The fingerprint identification module includes a light source, a photosensor, and light guiding layers disposed on the cover glass. The light guiding layers at least cover portions of opposite sides of the cover glass, respectively, such that light emitted by the light source after being reflected in the cover glass is guided to the fingerprint identification area. The photosensor is disposed in the display panel and corresponds to the fingerprint identification area to receive an optical signal of the light source emitted by the light source after being reflected by a finger in the fingerprint identification area.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: August 16, 2022
    Assignees: Beijing Xiaomi Mobile Software Co., Ltd., Nanjing Branch, Bejjing Xiaomi Mobile Software Co., Ltd.
    Inventors: Chih-jen Cheng, Tsang-chih Wu, Che-jui Hsu
  • Patent number: 11385109
    Abstract: A pressure detecting circuit may include a pressure sensing circuit (101), a signal generating circuit (102), and a frequency detecting circuit (103). The pressure sensing circuit (101) and the signal generating circuit (102) may be configured to constitute an oscillating circuit (104). The signal generating circuit (102) may be configured to generate an oscillating signal based on a pressure sensed by the pressure sensing circuit (101). The frequency detecting circuit (103) may be configured to detect a frequency of the oscillating signal and determine a value of the pressure sensed by the pressure sensing circuit (101) based on the frequency of the oscillating signal.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: July 12, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Pengpeng Wang, Xiaoliang Ding, Chih-Jen Cheng
  • Patent number: 11373563
    Abstract: An anti-noise signal modulation circuit, a modulation method, a display panel and a display device are disclosed. The anti-noise signal modulation circuit includes a frequency-modulation control sub-circuit. An input end of the frequency modulation control sub-circuit is configured to receive an initial signal, and an output end of the frequency-modulation control sub-circuit is connected to a signal processing circuit that is preset; the frequency-modulation control sub-circuit is configured to frequency-modulate the initial signal by a switch signal that hops according to a preset period, and to output a modulation result to the signal processing circuit; and a frequency corresponding to the switch signal does not overlap with a noise frequency.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: June 28, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Chih Jen Cheng, Xiaoliang Ding, Pengpeng Wang, Wei Liu, Yanling Han, Xueyou Cao, Ping Zhang
  • Publication number: 20220165081
    Abstract: The present disclosure relates to an in-screen fingerprint identification apparatus and an electronic device. The in-screen fingerprint identification apparatus includes a display panel and a fingerprint identification module. The display panel includes a backlight module, a liquid crystal layer, and a cover glass, which are sequentially stacked. The cover glass includes a fingerprint identification area. The fingerprint identification module includes a light source, a photosensor, and light guiding layers disposed on the cover glass. The light guiding layers at least cover portions of opposite sides of the cover glass, respectively, such that light emitted by the light source after being reflected in the cover glass is guided to the fingerprint identification area.
    Type: Application
    Filed: August 14, 2019
    Publication date: May 26, 2022
    Inventors: Chih-jen CHENG, Tsang-chih WU, Che-Jui HSU
  • Patent number: 11338284
    Abstract: A microfluidic system and method are disclosed. The microfluidic system includes: a first base substrate; a second base substrate opposite to the first base substrate; a first electrode on a side of the first base substrate close to the second base substrate; and a second electrode on a side of the second base substrate close to the first base substrate, the first base substrate and the second base substrate forms a cell, the cell is configured to receive a liquid to be detected, the first electrode and the second electrode are configured to drive the liquid to be detected during a first time period, and output a capacitance signal between the first electrode and the second electrode during a second time period.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: May 24, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yanling Han, Xue Dong, Haisheng Wang, Xiaoliang Ding, Yingming Liu, Yuzhen Guo, Xueyou Cao, Ping Zhang, Pengpeng Wang, Chih Jen Cheng, Wei Liu, Yangbing Li, Likai Deng
  • Publication number: 20220114832
    Abstract: An electronic device includes a fingerprint sensing layer including a plurality of columns of fingerprint pixel circuits, a touch layer including a plurality of columns of touch electrodes, a signal reading circuit including a plurality of common reading circuits each connected to at least one column of the touch electrodes and at least one column of the fingerprint pixel circuit and a control module configured to control the common reading circuits to be communicated with either the fingerprint pixel circuits or the touch electrodes at a timing; when the common reading circuit is communicated with the touch electrodes, acquire a touch signal which is collected by the touch electrodes and read by the common reading circuit; and when the common reading circuit is communicated with the fingerprint pixel circuits, acquire a fingerprint signal which is collected by the fingerprint pixel circuits and read by the common reading circuit.
    Type: Application
    Filed: May 12, 2020
    Publication date: April 14, 2022
    Applicants: Beijing Xiaomi Mobile Software Co., Ltd. Nanjing Branch, BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Chih-jen CHENG
  • Patent number: 11284029
    Abstract: An active pixel sensor array includes plurality of pixel circuits arranged in multiple rows and one column or multiple rows and multiple columns, each pixel circuit including: photoelectric conversion sub-circuit; resetting sub-circuit for resetting photoelectric conversion sub-circuit based on reset signal; source following sub-circuit connected between resetting sub-circuit and photoelectric conversion sub-circuit; strobing sub-circuit connected to source following sub-circuit and for switching on/off state based on strobe signal; and pre-discharging sub-circuit with one terminal connected between source following sub-circuit and strobing sub-circuit, and for switching on/off state based on received pre-discharge signal; when pixel circuits are arranged in multiple rows and columns, on time and off time of strobing sub-circuit in same row are same, and on time of strobing sub-circuit in each row is same as that of pre-discharging sub-circuit in next row, and off time of strobing sub-circuit is same as that
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: March 22, 2022
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Chih-jen Cheng
  • Publication number: 20220011919
    Abstract: Embodiments of the present disclosure provide a touch panel and a driving method thereof, and a touch device. The touch panel includes a plurality of touch electrodes and at least one first switch element. Each of the at least one first switch element is provided between two touch electrodes of the plurality of touch electrodes, and is configured to be turned on according to a first signal from a first signal terminal such that the corresponding touch electrodes among the plurality of touch electrodes are connected via the at least one first switch element to form a coil.
    Type: Application
    Filed: February 5, 2018
    Publication date: January 13, 2022
    Inventors: Xueyou CAO, Haisheng WANG, Xiaoliang DING, Yanling HAN, Chih Jen CHENG, Wei LIU, Pengpeng WANG, Ping ZHANG
  • Patent number: 11222193
    Abstract: A signal detection method applied in an electronic device includes: resetting each optical sensor at a first time point; collecting a first signal output by the optical sensor at the first time point, a second signal output by the optical sensor at a second time point, a third signal output by the optical sensor at a third time point, and a fourth signal output by the optical sensor at a fourth time point; obtaining a first difference value between the first signal and the second signal and a second difference value between the third signal and the fourth signal, and determining a sum of the first difference value and the second difference value as a signal variation amount in a current cycle. Also disclosed are an associated electronic device and a non-transitory computer readable storage medium.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: January 11, 2022
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventor: Chih-jen Cheng
  • Patent number: 11216117
    Abstract: Embodiments of the present disclosure provide a fingerprint identification device, an array substrate, a display device and a fingerprint identification method. The fingerprint identification device includes: a first gate line, a second gate line, a read signal line and a voltage dividing unit, wherein, a plurality of fingerprint identification units are defined by the second gate line and the read signal line intersecting with each other, and the fingerprint identification unit includes a photosensitive member and a thin film transistor; the first gate line is connected with the voltage dividing unit, the voltage dividing unit includes a pressure sensitive member and an equivalent resistor connected in series, and the second gate line is connected between the pressure sensitive member and the equivalent resistor.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: January 4, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Pengpeng Wang, Xue Dong, Haisheng Wang, Xiaoliang Ding, Yingming Liu, Chih Jen Cheng, Wei Liu, Xueyou Cao, Ping Zhang, Changfeng Li