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).

  • Publication number: 20210224503
    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: Application
    Filed: June 30, 2020
    Publication date: July 22, 2021
    Applicant: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Chih-jen CHENG
  • Publication number: 20210210567
    Abstract: A display panel and a display device are disclosed. The display panel includes a display array, an imaging array and a pinhole array layer. The display array includes a plurality of display pixels which are arrayed, and each of the display pixels includes a luminous element. The imaging array is disposed at a side of the display array facing away from a light exiting direction of the display panel, and includes a plurality of imaging pixels which are arrayed. The pinhole array layer is disposed at a side of the imaging array facing to the light exiting direction of the display panel, and includes a plurality of pinholes which are arrayed, the plurality of pinholes are corresponding to the plurality of imaging pixels. The display device includes the above-mentioned display panel, a display driver circuit and an image detection circuit.
    Type: Application
    Filed: October 17, 2017
    Publication date: July 8, 2021
    Applicant: BOE Technology Group Co., Ltd.
    Inventors: Chih-Jen CHENG, Pengpeng WANG
  • Publication number: 20210201717
    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: Application
    Filed: January 15, 2018
    Publication date: July 1, 2021
    Inventors: Chih Jen CHENG, Xiaoliang DING, Pengpeng WANG, Wei LIU, Yanling HAN, Xueyou CAO, Ping ZHANG
  • Publication number: 20210200412
    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: July 1, 2021
    Inventors: Xueyou CAO, Haisheng WANG, Xiaoliang DING, Yanling HAN, Chih Jen CHENG, Wei LIU, Pengpeng WANG, Ping ZHANG
  • Publication number: 20210176420
    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: Application
    Filed: June 4, 2020
    Publication date: June 10, 2021
    Applicant: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Chih-jen Cheng
  • Publication number: 20210165992
    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: Application
    Filed: March 25, 2020
    Publication date: June 3, 2021
    Applicant: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Chih-jen CHENG
  • Publication number: 20210164844
    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: Application
    Filed: September 20, 2017
    Publication date: June 3, 2021
    Inventors: Chih Jen CHENG, Lijun ZHAO
  • Publication number: 20210110134
    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: Application
    Filed: May 12, 2020
    Publication date: April 15, 2021
    Applicant: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventors: Chih-jen CHENG, Che-jui HSU, Tsang-chih WU
  • Patent number: 10970514
    Abstract: Provided are a compensation structure and a driving method thereof, a display panel, and a display device. The compensation structure includes a photoelectric sensing circuit, a fingerprint recognition circuit and a compensation circuit. The photoelectric sensing circuit is configured to respectively generate a first electric signal and a second electric signal according to received first optical signal and second optical signal. The fingerprint recognition circuit is configured to be connected to the photoelectric sensing circuit to receive the first electric signal, and to employ the first electric signal to determine a fingerprint pattern. The compensation circuit is configured to be connected to the photoelectric sensing circuit to receive the second electric signal, and to employ the second electric signal to perform optical compensation so as to adjust the first electric signal.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: April 6, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xueyou Cao, Haisheng Wang, Xiaoliang Ding, Chih Jen Cheng, Yanling Han, Wei Liu, Pengpeng Wang, Ping Zhang
  • Patent number: 10949025
    Abstract: The present disclosure provides an optical touch device and a manufacturing method thereof, a display and an electronic device, wherein the optical touch device comprises: a pixel array (11) that comprises a plurality of pixel sub-circuits (101) each of which comprises M first pixels (1011) and N second pixels (1012), wherein detection rays with a preset frequency are emitted by the second pixels (1012), where M and N are positive integers; a light receiving array (12) that comprises a plurality of light receivers (121) corresponding, at a one-to-one basis, to the plurality of pixel sub-circuits (101), wherein each of the light receivers (121) generates an sensing signal by receiving reflected rays of the detection rays emitted by a corresponding second pixel (1012); and a detection circuit (13) connected with the plurality of light receivers (121), wherein the detection circuit (13) performs touch positioning.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: March 16, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xiaoliang Ding, Haisheng Wang, Yingming Liu, Wei Liu, Chih-Jen Cheng, Pengpeng Wang, Xueyou Cao, Ping Zhang, Chun-Wei Wu
  • Patent number: 10923507
    Abstract: An array substrate includes: a plurality of pixel units arranged in an array, selection lines, a reset circuit and readout circuits. Second terminals of transistors in pixel units belonging to a same column are connected to at least two of the read lines, so that a part of the pixel units are connected to a same read line, and another part of the pixel units are connected to the other one of the at least two of the read lines. For each column of the pixel units, each of the read lines is connected to one of the readout circuits corresponding to the column of the pixel units through a switching element; and for each column of the pixel units, each of the read lines is connected to the reset circuit through a switching element.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: February 16, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Chih Jen Cheng, Pengpeng Wang, Wei Liu, Xueyou Cao, Yanling Han, Ping Zhang, Xiaoliang Ding
  • Patent number: 10914642
    Abstract: The embodiments of the present disclosure relate to a device for temperature detection, including a delay unit including an odd number of inverters coupled end to end, a switching transistor having a control electrode coupled to an output end of the delay unit, a first electrode coupled to an operating voltage node of the device, and a second electrode coupled to an input end of the delay unit, a first capacitor having a first end coupled to the input end of the delay unit, and a second end coupled to the first electrode of the switching transistor or a ground node of the device, and a temperature sensitive transistor having a control electrode coupled to a bias voltage end of the device, a first electrode coupled to the input end of the delay unit, and a second electrode coupled to the ground node of the device.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: February 9, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Lijun Zhao, Haisheng Wang, Yingming Liu, Rui Xu, Changfeng Li, Yanan Jia, Pengpeng Wang, Chih Jen Cheng
  • Patent number: 10914977
    Abstract: A display panel includes a first substrate, a second substrate disposed opposing the first substrate, a first transparent layer, a first light shield layer, and a photosensitive element layer located between the first substrate and the second substrate. The first transparent layer, the first light shield layer, and the photosensitive element layer are sequentially disposed along a direction from the first substrate to the second substrate. The first transparent layer includes a plurality of protrusions extending toward the first substrate. The first light shield layer includes a plurality of first openings, and the photosensitive element layer includes a plurality of photosensitive elements for acquiring a fingerprint image. The protrusions, the first openings, and the photosensitive elements have one-to-one correspondence, and have at least partially overlapped orthographic projections on the second substrate.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: February 9, 2021
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventors: Che-jui Hsu, Chih-jen Cheng
  • Patent number: 10915775
    Abstract: Disclosed are a noise detection circuit, a noise detection method, and a print recognition apparatus. The noise detection circuit includes a differential amplifier, an analog-to-digital converter, a control circuit, and a first switch circuit; the control circuit is configured to control the first switch circuit to make the first input signal terminal connected with the reference signal terminal or grounded, and to make the second input signal terminal connected with the reference signal terminal or grounded, and when the first input signal terminal is connected with the reference signal terminal or grounded, and the second input signal terminal is connected with the reference signal terminal or grounded, to analyze the digital signal output by the analog-to-digital converter to determine a source of noise of the print recognition apparatus.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: February 9, 2021
    Assignee: BOE Technology Group Co., Lid.
    Inventors: Pengpeng Wang, Haisheng Wang, Xiaoliang Ding, Chih-Jen Cheng, Yanling Han, Wei Liu, Xueyou Cao, Ping Zhang
  • Patent number: 10866648
    Abstract: The present disclosure relates to a display substrate. The display substrate includes an active region and a non-active region, and a depth camera is disposed in the non-active region. The depth camera includes at least one receiving unit and a plurality of diffractive units. At least a part of the diffractive units includes an infrared light emitting device disposed on the substrate that emits infrared light. The part of the diffractive units includes a diffractive optical element disposed on the infrared light emitting device and used to transmit the infrared light emitted from the infrared light emitting device to an object. The receiving unit includes an infrared photosensitive device disposed on the substrate and used to receive the infrared light reflected by the object.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: December 15, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Pengpeng Wang, Haisheng Wang, Xiaoliang Ding, Chih Jen Cheng, Yanling Han, Yangbing Li, Xueyou Cao, Wei Liu, Ping Zhang
  • Patent number: 10868990
    Abstract: An active pixel sensor, a driving method thereof, an imager and an electronic device are disclosed. The active pixel sensor includes: a photosensitive element, configured to convert a received light signal into an electrical signal; a follower circuit, connected with the photosensitive element and configured to convert the electrical signal into an output voltage, the follower circuit including a source follower transistor; and an adjustment circuit, connected with the follower circuit and configured to collect the output voltage of the follower circuit and to adjust a bias current of the source follower transistor according to the output voltage, so as to adjust the output voltage to a preset range.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: December 15, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Chih Jen Cheng, Pengpeng Wang, Wei Liu, Xiaoliang Ding, Rui Xu, Changfeng Li
  • Patent number: 10802596
    Abstract: A display device, a self-luminous display panel and a gesture recognition method are provided. The display device includes a self-luminous display panel, an infrared light source, at least one camera device, and an image processing device. The image processing device is coupled to the at least one camera device and configured to perform gesture recognition based on a plurality of successive infrared images and a plurality of successive visible light images of an operation body taken within a same period of time.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: October 13, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xueyou Cao, Xue Dong, Haisheng Wang, Xiaoliang Ding, Chih Jen Cheng, Pengpeng Wang, Wei Liu, Yanling Han, Ping Zhang
  • Patent number: 10802630
    Abstract: The disclosure discloses an array substrate, a method for fabricating the same, a display panel, and a display device, and the array substrate includes: a base substrate, a pressure-sensitive component, a plurality of dual-gate transistors, and a plurality of pixel transistors, where the pressure-sensitive component includes a first electrode layer, a pressure-sensitive layer, and a second electrode layer which are arranged on the base substrate in that order, and the second electrode layer includes a plurality of second electrodes arranged corresponding to the respective dual-gate transistors in a one-to-one manner; and the dual-gate transistors and the pixel transistors are arranged above the second electrode layer, and each of the plurality of second electrodes is electrically connected with a bottom-gate electrode in a corresponding dual-gate transistor, so that a pressure can be detected.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: October 13, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD
    Inventors: Yuzhen Guo, Xue Dong, Haisheng Wang, Chun-wei Wu, Xueyou Cao, Yingming Liu, Xiaoliang Ding, Chih-Jen Cheng
  • Patent number: 10805565
    Abstract: Embodiments of the present disclosure provide a CMOS image sensor, and a pixel circuit and a driving method thereof. The pixel circuit includes: a collection circuit configure to collect an incident light and convert a collected optical signal into an electric signal; a source follower circuit configured to output the received electric signal to a collection signal output terminal under the control of scan lines; and a voltage conversion circuit, configured to be connected to the collection signal output terminal through a read signal line, convert a voltage at the collection signal output terminal to an output voltage, and output the output voltage at a voltage output terminal, wherein the output voltage is within an operating voltage range of an image processor.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 13, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Chih Jen Cheng, Xiaoliang Ding
  • Patent number: 10789443
    Abstract: A recognition device, a fingerprint recognition device and a fingerprint recognition apparatus are provided, and the fingerprint recognition device includes: a detection substrate provided with fingerprint detector units; a light barrier which is provided at a side, provided with the fingerprint detector units, of the detection substrate, and provided with light through holes corresponding to the fingerprint detector units; a cover plate which is provided at a side, facing away from the detection substrate, of the light barrier, and includes a light exit surface facing the light barrier and a touch surface facing away from the light barrier; and a light source for emitting light to the cover plate. Each fingerprint detector unit is configured to output an electrical signal according to an intensity of light incident on the fingerprint detector unit, after the light passes through the light through hole corresponding to the fingerprint detector unit.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: September 29, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xueyou Cao, Haisheng Wang, Xiaoliang Ding, Chih Jen Cheng, Yanling Han, Pengpeng Wang, Wei Liu, Ping Zhang, Xue Dong, Jing Lv