Patents by Inventor ZHONGLAN CAI

ZHONGLAN CAI 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: 10262565
    Abstract: The invention discloses an organic light-emitting display panel, a method and apparatus for testing the same, and a method for displaying on the same. The luminance of each of grayscales of a displayed picture is preset; a data signal voltage corresponding to the highest grayscale is determined while switching from a preset picture to another picture without any afterimage. An active pulse duty cycle of a light-emission control signal is determined according to the determined data signal voltage and the luminance of the highest grayscale. Data signal voltages corresponding to the other grayscales are determined. The determined active pulse duty cycle of the light-emission control signal, and the determined data signal voltages corresponding to the respective grayscales are stored.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: April 16, 2019
    Assignee: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu Xiang, Yue Li, Yana Gao, Renyuan Zhu, Zhonglan Cai
  • Publication number: 20180240405
    Abstract: An organic light-emitting display panel, an organic light-emitting display apparatus and a driving method of the organic light-emitting display panel are provided. The organic light-emitting display panel includes a data line and a gate line intersecting the data line, a switching signal line, a pixel driving circuit including a first voltage terminal for supplying a high-level direct current voltage, a driving transistor, a light-emitting diode and a photosensitive switch electrically connected between the first voltage terminal and the light-emitting diode; a photosensitive element disposed at a non-display region of the organic light-emitting display panel; and a control circuit including a storage module and a control module. The photosensitive element is configured to sense environment brightness and is electrically connected with the control circuit.
    Type: Application
    Filed: August 4, 2017
    Publication date: August 23, 2018
    Applicant: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Yue LI, Gang LIU, Zhonglan CAI
  • Publication number: 20180219058
    Abstract: Disclosed are an organic light-emitting display panel and an organic light-emitting display device. The organic light-emitting display panel includes a display area, a middle area of the display panel, an array substrate, pixels arranged in an array, and first signal lines and second signal lines for providing the pixels with signals and extending in a first direction, in the display area of the array substrate, a first quantity of pixels corresponding to a first signal line is less than a second quantity of pixels corresponding to a second signal line, and first transparent conductive lines are electrically connected with the first signal lines in the middle area.
    Type: Application
    Filed: March 28, 2018
    Publication date: August 2, 2018
    Applicant: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu XIANG, Renyuan ZHU, Yue LI, Yana GAO, Zhonglan CAI
  • Publication number: 20180197458
    Abstract: Disclosed are a method for driving a pixel circuit, a display panel and a display device. The pixel circuit includes: a data write module, a drive transistor, a hold module and a light-emitting element. The method comprises, in a time period for a frame of display: a data writing stage in which a data signal is written by the data write module into a gate electrode of the drive transistor; a light-emitting stage in which a voltage on the gate electrode of the drive transistor is held by the hold module, the drive transistor supplies a drive current to the light-emitting element, and the light-emitting element emits light in response to the drive current; and a cut-off stage in which the drive transistor operates in a full cut-off region.
    Type: Application
    Filed: March 5, 2018
    Publication date: July 12, 2018
    Inventors: Kerui XI, Tingting CUI, Baiquan LIN, Junting OUYANG, Zhonglan CAI
  • Publication number: 20180182292
    Abstract: The present disclosure discloses a display panel and a display device. The display panel includes pixel circuits arranged in an array. Each pixel circuit includes a driving transistor, at least two switching transistors and at least two first auxiliary electrodes arranged in a one to one relationship to the switching transistors. By electrically connecting each of the first auxiliary electrodes with a gate of a related switching transistor, the first auxiliary electrode and the gate of the corresponding switching transistor have a same potential. A capacitor can be formed between the first auxiliary electrode and the active layer, and a capacitor is formed between the gate and the active layer.
    Type: Application
    Filed: February 13, 2018
    Publication date: June 28, 2018
    Inventors: Zaiwen Zhu, Hong Lin, Shui He, Sera Kenji, Isao Shoji, Zhonglan Cai
  • Publication number: 20180158417
    Abstract: Disclosed are a display panel and a display device. When a display area is divided into a first display area and a second display area, and the number of pixels in a row of pixels in the second display area is smaller than the number of pixels in a row of pixels in the first display area, a load on a scan signal line connected with a row of pixels in the second display area is lower than a load on a scan signal line connected with a row of pixels in the first display area, and at least one of the respective scan signal lines connected with the respective rows of pixels in the second display area is connected with a compensation capacitor.
    Type: Application
    Filed: February 5, 2018
    Publication date: June 7, 2018
    Applicant: WUHAN TIANMA MICRO-ELECTRONICS CO.,LTD.
    Inventors: Dongxu XIANG, Renyuan ZHU, Yue LI, Yana GAO, Xingyao ZHOU, Zhonglan CAI
  • Publication number: 20180158398
    Abstract: Provided are an organic light-emitting display panel, a driving method and a driving device therefor. The driving method includes: setting a plurality of brightness levels of the organic light-emitting display panel and a plurality of maximum gray scale brightnesses, and the plurality of maximum gray scale brightnesses include a first maximum gray scale brightness corresponding to a maximum brightness level of the organic light-emitting display panel, and an effective pulse duty cycle of a light-emitting control signal for driving the first maximum gray scale brightness is defined as a first effective pulse duty cycle; determining a target brightness level of the switched picture and a target maximum gray scale brightness corresponding to the target brightness level; adjusting the target effective pulse duty cycle of the light-emitting control signal for driving the switched picture.
    Type: Application
    Filed: February 2, 2018
    Publication date: June 7, 2018
    Applicant: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu XIANG, Yue LI, Renyuan ZHU, Yana GAO, Zhonglan CAI
  • Publication number: 20180151123
    Abstract: Disclosed are a pixel circuit and method for driving the same, an organic light emitting display panel and a display device. Prior to the data signal is written into the control electrode of the driving transistor, a unified common voltage signal is input to the first electrode of the driving transistor. The common voltage signal, along with a threshold voltage of the driving transistor, is written into the control electrode of the driving transistor. It can be ensured that each time the data signal is written to the control electrode of the driving transistor, voltages of the control electrode and the first electrode of the driving transistor can jump by a unified potential, so as to avoid the variation of the voltage change in the control electrode which came as a result of the parasitic capacitance between the control electrode and the first electrode of the driving transistor.
    Type: Application
    Filed: January 8, 2018
    Publication date: May 31, 2018
    Inventors: Yue LI, Renyuan ZHU, Dongxu XiANG, Yana GAO, Zeyuan CHEN, Zhonglan CAI
  • Publication number: 20180144681
    Abstract: Disclosed are a drive method and a drive device for a display panel, a display panel and a display device. The method comprises: acquiring a picture to be displayed by a display panel; driving the display panel with a first picture refresh frequency to display the picture to be displayed if the number of successive frames of pictures same to the picture to be displayed exceeds a preset number; otherwise, driving the display panel with a second picture refresh frequency to display the picture to be displayed; and, the first picture refresh frequency is less than the second picture refresh frequency.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 24, 2018
    Applicant: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu Xiang, Yue Li, Zeyuan Chen, Renyuan Zhu, Yana Gao, Zhonglan Cai
  • Publication number: 20180145093
    Abstract: A display panel is described. Further, an electroluminescent display panel and a display device are described. By arrangement of a second signal bus line, a first end of a first signal line in a first display area in the display panel is electrically connected with the first signal bus line, and the second end of the first signal line is electrically connected with a first conducting wire in the second signal bus line, so that uniformity of a signal input by the first signal line in the first display area can be ensured. Therefore, the structure is not only the precondition of ensuring signal uniformity of the first display area, but is also the precondition of ensuring signal uniformity of a display area of the entire display panel.
    Type: Application
    Filed: January 18, 2018
    Publication date: May 24, 2018
    Applicant: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Kerui XI, Tingting Cui, Zhonglan Cai, Zuzhao Xu
  • Publication number: 20180130541
    Abstract: Disclosed are a shift register element, a method for driving the same, and a display panel. The method includes: an output module including a first node and a third node, wherein the output module is configured to provide an output terminal with a signal of a first signal terminal or a second signal terminal according to voltage applied to the first node and the third node; a first driver configured to control the voltage of the first node, and voltage of a second node according to signals of the first input terminal and the second input terminal; a second driver configured to control voltage of the third node according to the voltage of the first node and the second node; and a feedback regulation module configured to control voltage of the first node according to the signal of the output terminal, and signals of a third input terminal and a fourth input terminal.
    Type: Application
    Filed: January 8, 2018
    Publication date: May 10, 2018
    Inventors: Yue Li, Renyuan Zhu, Dongxu Xiang, Zhonglan Cai, Juan Zhu
  • Publication number: 20180130420
    Abstract: The present disclosure discloses an electroluminescent display panel, a display device and a method for driving the same. The electroluminescent display panel includes a plurality of pixel circuits arranged in an array, wherein the plurality of pixel circuits each includes a node initialization module and an anode reset module; wherein a connection passage is arranged between every two adjacent pixel circuits of each column of the plurality of pixel circuits; and the connection passage is configured to provide a reference signal to either an anode reset module or a node initialization module of one of the every two adjacent pixel circuits.
    Type: Application
    Filed: January 9, 2018
    Publication date: May 10, 2018
    Inventors: Yana Gao, Dongxu Xiang, Renyuan Zhu, Yue Li, Zeyuan Chen, Zhonglan Cai
  • Publication number: 20180130401
    Abstract: Disclosed are a display panel and an electronic device. The display panel includes sub-pixels arranged in an array, wherein each pixel row of the sub-pixels comprises 3n sub-pixels, with every six adjacent sub-pixels of the pixel row forming a pixel group, n?2, and the six adjacent sub-pixels of the pixel group are arranged in sequential order in a first direction parallel to the row direction. The display panel further includes a controller, where in a first display mode the controller controls each of the sub-pixels to be charged to emit light; and in a second display mode the controller controls at most two sub-pixels of each of the pixel groups in at least one of the pixel rows to not emit light, and controls at most two sub-pixels of the pixel group which have same order in two adjacent frames of pictures to not emit light.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 10, 2018
    Applicant: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu XIANG, Yue LI, Zeyuan CHEN, Yana GAO, Renyuan ZHU, Zhonglan CAI
  • Publication number: 20180130424
    Abstract: The disclosure discloses a pixel circuit, a method for driving the same, and a display panel. Before a drive control module controls a drive transistor to drive a light emitting device to emit light, a node reset module provides a gate of the drive transistor with a signal of a first voltage terminal; and also while the node reset module is providing the gate of the drive transistor with the signal of the first voltage terminal, a light emitting control module provides a first electrode of the drive transistor with the signal of the first voltage terminal.
    Type: Application
    Filed: January 10, 2018
    Publication date: May 10, 2018
    Inventors: Yana GAO, Dongxu XIANG, Renyuan ZHU, Yue LI, Zeyuan CHEN, Zhonglan CAI
  • Publication number: 20180129331
    Abstract: Disclosed are an array substrate, a display panel, a display device and a method for manufacturing an array substrate. The array substrate includes a base substrate, comprising a display region and a non-display region surrounding the display region, and the display region of the base substrate is provided with a plurality of pixel units, with each of the pixel units comprising a thin-film transistor; and at least one pressure sensor, which is disposed on the non-display region of the base substrate, and the pressure sensor is disposed in the same layer and made of same materials with an active layer of the thin-film transistor, the active layer includes a channel region and a heavily doped region, and a square resistance of the pressure sensor is larger than that of the active layer.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 10, 2018
    Applicant: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Zhiwei ZHOU, Qijun Yao, Feng Lu, Liang Liu, Yan Shen, Huafeng Bian, Zhonglan Cai
  • Publication number: 20180068602
    Abstract: The invention discloses an organic light-emitting display panel, a method and apparatus for testing the same, and a method for displaying on the same. The luminance of each of grayscales of a displayed picture is preset; a data signal voltage corresponding to the highest grayscale is determined while switching from a preset picture to another picture without any afterimage. An active pulse duty cycle of a light-emission control signal is determined according to the determined data signal voltage and the luminance of the highest grayscale. Data signal voltages corresponding to the other grayscales are determined. The determined active pulse duty cycle of the light-emission control signal, and the determined data signal voltages corresponding to the respective grayscales are stored.
    Type: Application
    Filed: November 8, 2017
    Publication date: March 8, 2018
    Inventors: Dongxu XIANG, Yue LI, Yana GAO, Renyuan ZHU, Zhonglan CAI
  • Patent number: 9864458
    Abstract: A touch-control display panel with integrated force touch function is provided. The touch-control display panel includes a first substrate and a second substrate arranged in opposite to the first substrate; a semiconductor layer having a plurality of active regions; and a light-shielding metal layer sandwiched between the first substrate and the semiconductor layer. The light-shielding metal layer has a first region and a second region isolated from the first region. A vertical projection of the first region on the first substrate is equal to or larger than a vertical projection of the active regions on the first substrate, and the second region contains a plurality of first force sensing electrodes.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: January 9, 2018
    Assignees: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Gujun Li, Liang Xie, Zhonglan Cai
  • Publication number: 20170308221
    Abstract: A touch-control display panel with integrated force touch function is provided. The touch-control display panel includes a first substrate and a second substrate arranged in opposite to the first substrate; a semiconductor layer having a plurality of active regions; and a light-shielding metal layer sandwiched between the first substrate and the semiconductor layer. The light-shielding metal layer has a first region and a second region isolated from the first region. A vertical projection of the first region on the first substrate is equal to or larger than a vertical projection of the active regions on the first substrate, and the second region contains a plurality of first force sensing electrodes.
    Type: Application
    Filed: July 25, 2016
    Publication date: October 26, 2017
    Inventors: GUJUN LI, LIANG XIE, ZHONGLAN CAI