Patents by Inventor Jinfang Wu

Jinfang Wu 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: 20210124206
    Abstract: The invention provides a TFT array substrate and LCD panel. the TFT array substrate comprises a first metal layer, a first interlayer insulating layer, a second metal layer, a second interlayer insulating layer and a third metal layer sequentially disposed above the substrate. The first, second and third metal layers comprise a plurality of first, second and third fanout lines in the fanout line area, respectively; two of the first, second, and third fanout lines are connected to the data lines, and the other is connected with the touch line; because the first interlayer insulating layer is disposed between the first and second fanout lines, and the second interlayer insulating layer is disposed between the third and second fanout lines, the first, second and third fanout lines can overlap, which can effectively reduce the fanout line area and help to achieve a narrow border.
    Type: Application
    Filed: September 27, 2018
    Publication date: April 29, 2021
    Inventors: Yafeng Li, Jinfang Wu
  • Publication number: 20200320949
    Abstract: The invention provides a GOA circuit. The first node control module of the GOA circuit provided by the invention comprises a tenth TFT, an eleventh TFT and a twelfth TFT of N-type TFTs, when the voltage of the first node is high, the gate-to-source voltage difference of the twelfth TFT is the threshold voltage thereof, so that the drain-source voltage difference of the eleventh TFT is also the threshold voltage of the twelfth TFT, thereby making the resistance between the drain of the tenth TFT and the first node is extremely large, which can avoid the impact of leakage current generated by the tenth TFT on the voltage of the first node when the noise and coupling in the second node occurs, and to ensure the normal output of the scan signal.
    Type: Application
    Filed: September 27, 2018
    Publication date: October 8, 2020
    Inventors: Yafeng Li, Jinfang Wu
  • Patent number: 10796656
    Abstract: The invention provides a GOA circuit. The first node control module of the GOA circuit provided by the invention comprises a tenth TFT, an eleventh TFT and a twelfth TFT of N-type TFTs, when the voltage of the first node is high, the gate-to-source voltage difference of the twelfth TFT is the threshold voltage thereof, so that the drain-source voltage difference of the eleventh TFT is also the threshold voltage of the twelfth TFT, thereby making the resistance between the drain of the tenth TFT and the first node is extremely large, which can avoid the impact of leakage current generated by the tenth TFT on the voltage of the first node when the noise and coupling in the second node occurs, and to ensure the normal output of the scan signal.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: October 6, 2020
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yafeng Li, Jinfang Wu
  • Patent number: 10714509
    Abstract: The present disclosure provides a display panel including a display area and a non-display area, a base substrate, a plurality of thin film transistors, a plurality of touch signal lines, a first test signal line area, an array substrate row driving circuit, a second test signal line area, a ground line area and an insulating layer. The thin film transistor includes a gate, a gate insulating layer, a source and a drain. The non-display area includes a first side and a second side; the array substrate row driving circuit respectively forms a first gap and a second gap with the first test signal line area and the second test signal line area, an orthographic projection of the ground line area on the base substrate is in the projection of the second test signal line area in the base substrate. The present disclosure also provides a display device.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: July 14, 2020
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yafeng Li, Jinfang Wu
  • Publication number: 20200081290
    Abstract: The disclosure discloses a liquid crystal display panel including a thin film transistor (TFT) substrate, a CF substrate disposed opposite to the TFT substrate, and a liquid crystal layer between the TFT substrate and the CF substrate, at least a base substrate, a TFT layer, and a pixel electrode layer is arranged on the TFT substrate, a light-shielding layer configured to cover each of the thin film transistors disposed between the base substrate and the TFT layer of the TFT substrate, and a color filter layer is disposed on the CF substrate. The disclosure also discloses a corresponding liquid crystal display device. In the embodiment, the backlight module is disposed outside the CF substrate, and the light-shielding layer is disposed in the TFT substrate to reduce the thickness of the liquid crystal display panel and the frame width, and the process is simple, and the cost is low.
    Type: Application
    Filed: November 29, 2017
    Publication date: March 12, 2020
    Inventors: Zuomin LIAO, Jinfang WU
  • Publication number: 20190155092
    Abstract: The present invention provides a method for manufacturing a color filter substrate, the method comprises providing a substrate body with a surface of the substrate body having the pixel unit areas; defining a dividing line on the substrate body; defining a dividing line on the substrate body; marking two sides of the auxiliary area as a predetermined displaying area and a predetermined shielding area, marking first regions in the predetermined displaying area, marking second regions in the predetermined shielding area, and marking third regions in other areas; and forming a shielding layer in each of the second regions and at least one third region.
    Type: Application
    Filed: December 5, 2017
    Publication date: May 23, 2019
    Applicant: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Yafeng LI, Jinfang WU
  • Publication number: 20190096923
    Abstract: The present disclosure provides a display panel including a display area and a non-display area, a base substrate, a plurality of thin film transistors, a plurality of touch signal lines, a first test signal line area, an array substrate row driving circuit, a second test signal line area, a ground line area and an insulating layer. The thin film transistor includes a gate, a gate insulating layer, a source and a drain. The non-display area includes a first side and a second side; the array substrate row driving circuit respectively forms a first gap and a second gap with the first test signal line area and the second test signal line area, an orthographic projection of the ground line area on the base substrate is in the projection of the second test signal line area in the base substrate. The present disclosure also provides a display device.
    Type: Application
    Filed: December 21, 2017
    Publication date: March 28, 2019
    Inventors: Yafeng LI, Jinfang WU
  • Patent number: 10146080
    Abstract: The present invention provides a method for manufacturing a display device includes providing an array substrate with a plurality of pixel unit areas formed on a surface thereof; defining a dividing line; dividing the pixel unit areas to a pixel calculating area, a predetermined displaying area, and a predetermined shielding area, and dividing the pixel calculating area to a first part and a second part by the dividing line; calculating areas of sub pixels according to light extraction efficiencies and effective light extraction areas of the sub pixels; forming a shielding layer according to the areas of the sub pixels.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: December 4, 2018
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yafeng Li, Jinfang Wu
  • Patent number: 9935094
    Abstract: The present invention provides a GOA circuit based on LTPS semiconductor thin film transistor to control the voltage levels of the first node (Q(n)) and the second node (P(n)) with the forward scan direct current control signal (U2D) and the backward scan direct current control signal (D2U). The clock signal (CK(M)) is merely in charge of the output of the GOA unit of corresponding stage, which can effectively reduce the loading of the clock signal. It ensures that the entire loading of the clock signal after the GOA units of multiple stages are coupled to promote the output stability of the GOA circuit, and to realize the forward-backward scan of the GOA circuit. Moreover, the GOA unit of each stage comprises only ten thin film transistors, which is beneficial to reduce the layout space of the GOA circuit and to achieve the narrow frame design of the display device.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: April 3, 2018
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yafeng Li, Jinfang Wu
  • Patent number: 9916805
    Abstract: The invention provides a GOA circuit for LTPS-TFT, by adding the twelfth and thirteenth TFTs (T12, T13) controlled by output ends (G(n?1), G(n+1)) of (n?1)-th and (n+1)-th GOA units, the drain of twelfth TFT T12 connected through the fourth node (W1(n)) to source of first TFT (T1), the drain of first TFT (T1) connected to output end of (n?1)-th GOA unit, the drain of thirteenth TFT (T13) connected through the fifth node W2(n) to source of third TFT (T3), the drain of third TFT (T3) connected to output end of (n+1)-th GOA unit; the first and third TFTs (T1, T3) controlled respectively by the forward and backward scan DC control signals (U2D, D2U) to reduce leakage of twelfth TFT (T12) in forward scanning and leakage of thirteenth TFT (T13) in backward scanning. As such, the leakage in key TFTs is reduced and GOA circuit stability is improved.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: March 13, 2018
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yafeng Li, Jinfang Wu
  • Publication number: 20180040600
    Abstract: The present invention provides a GOA circuit based on LTPS semiconductor thin film transistor to control the voltage levels of the first node (Q(n)) and the second node (P(n)) with the forward scan direct current control signal (U2D) and the backward scan direct current control signal (D2U). The clock signal (CK(M)) is merely in charge of the output of the GOA unit of corresponding stage, which can effectively reduce the loading of the clock signal. It ensures that the entire loading of the clock signal after the GOA units of multiple stages are coupled to promote the output stability of the GOA circuit, and to realize the forward-backward scan of the GOA circuit. Moreover, the GOA unit of each stage comprises only ten thin film transistors, which is beneficial to reduce the layout space of the GOA circuit and to achieve the narrow frame design of the display device.
    Type: Application
    Filed: January 29, 2016
    Publication date: February 8, 2018
    Inventors: Yafeng Li, Jinfang Wu
  • Publication number: 20180033389
    Abstract: The invention provides a GOA circuit for LTPS-TFT, by adding the twelfth and thirteenth TFTs (T12, T13) controlled by output ends (G(n?1), G(n+1)) of (n?1)-th and (n+1)-th GOA units, the drain of twelfth TFT T12 connected through the fourth node (W1(n)) to source of first TFT (T1), the drain of first TFT (T1) connected to output end of (n?1)-th GOA unit, the drain of thirteenth TFT (T13) connected through the fifth node W2(n) to source of third TFT (T3), the drain of third TFT (T3) connected to output end of (n+1)-th GOA unit; the first and third TFTs (T1, T3) controlled respectively by the forward and backward scan DC control signals (U2D, D2U) to reduce leakage of twelfth TFT (T12) in forward scanning and leakage of thirteenth TFT (T13) in backward scanning. As such, the leakage in key TFTs is reduced and GOA circuit stability is improved.
    Type: Application
    Filed: January 28, 2016
    Publication date: February 1, 2018
    Inventors: Yafeng Li, Jinfang Wu