Patents Assigned to Hannstar Display Corporation
  • Patent number: 10714203
    Abstract: A shift register and a display apparatus are provided. The shift register includes a pre-charge unit, a pull-up unit, a first pull-down unit and a second pull-down unit. The pre-charge unit receives first and second input signals, and outputs a pre-charge signal via a first node. The pull-up unit receives a pre-charge signal and a clock signal, and outputs a scanning signal via a second node. The first pull-down unit receives the pre-charge signal, first and second pull-down control signals, and controls whether to pull-down the scanning signal to a reference voltage level. The second pull-down unit receives the pre-charge signal, first and second pull-down control signals, and controls whether to keep the scanning signal at the reference voltage level. The duty cycle of the clock signal is less than 50 percent.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: July 14, 2020
    Assignees: HannStar Display (Nanjing) Corporation, HannStar Display Corporation
    Inventor: Chien-Ting Chan
  • Patent number: 10705661
    Abstract: A touch device including a plurality of touch electrodes which are electrically separated is provided. Each touch electrode includes a plurality of first curved patterns and a plurality of conductive lines. The first curved patterns are parallel to each other. A first pitch is between two adjacent first curved patterns. Each conductive line is connected between two adjacent first curved patterns. The conductive lines are arranged in a plurality of second curved patterns. The first curved patterns intersect the second curved patterns. In this way, the touch device can have preferable touch and visual effects.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: July 7, 2020
    Assignee: HannStar Display Corporation
    Inventors: Hsing-Ying Lee, Cheng-Yen Yeh, Wei-Chih Hsu
  • Patent number: 10700020
    Abstract: A thin film transistor substrate having a display region and a peripheral region, and the thin film transistor substrate includes a first substrate, scan lines, data lines, an insulating layer, first thin film transistors, at least one passivation layer and at least one gate driving circuit. The first substrate has an electrostatic protection area and a driving circuit area, and the electrostatic protection area and the driving circuit area are situated in the peripheral region. The scan lines, the data lines and the first thin film transistors are disposed in the display region. The insulating layer includes a gate insulator of the first thin film transistor, and the passivation layer is disposed on the insulating layer. The gate driving circuit is disposed in the driving circuit area. At least one of the passivation layer and the insulating layer are not disposed in the electrostatic protection area.
    Type: Grant
    Filed: February 25, 2018
    Date of Patent: June 30, 2020
    Assignee: HANNSTAR DISPLAY CORPORATION
    Inventors: Sung-Chun Lin, Hsien-Tang Hu, Hsuan-Chen Liu, Chien-Ting Chan
  • Patent number: 10663822
    Abstract: The method for manufacturing a display panel includes: forming a thin film transistor (TFT), a first signal line, a second signal line, a third signal line, and a first insulation layer on a substrate, in which the first signal line is coupled to one of the gate and the source of the TFT, the second signal line is coupled to the other of the gate and the source, and the third signal line is electrically connected to the first signal line through a via of the first insulation layer; forming a second insulation layer on the TFT, the first signal line, the second signal line, the third signal line, and the first insulation layer; and forming a first transparent conductive layer on the second insulation layer with an electrode covering at least part of the third signal line.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: May 26, 2020
    Assignee: HannStar Display Corporation
    Inventor: Cheng-Yen Yeh
  • Patent number: 10656434
    Abstract: The display device includes a first display panel and a second display panel. The first display panel includes first pixel structures having a first pixel pitch. The second display panel includes second pixel structures having a second pixel pitch. The first display panel is overlapped with the second display panel. A user would not see a moiré pattern generated by the display device by adjusting the first pixel pitch, the second pixel pitch, and an effective distance between the first display panel and the second display panel.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: May 19, 2020
    Assignees: HannStar Display (Nanjing) Corporation, HannStar Display Corporation
    Inventors: Yu-Chen Liu, Wei-Chih Hsu, Yen-Chung Chen
  • Patent number: 10649297
    Abstract: A pixel structure includes a substrate, a thin film transistor and a common electrode. The thin film transistor is disposed on the substrate, wherein a semiconductive active layer of the thin film transistor has a channel region disposed between a source and a drain, the channel region includes a main channel region and at least one sub channel region, a channel length of the main channel region is less than a channel length of the at least one sub channel region, and the channel length of the main channel region is equal to a minimum of a channel length of the channel region. The common electrode is disposed on the thin film transistor, and the common electrode overlaps at least a portion of the at least one sub channel region, wherein the common electrode has an opening exposing the main channel region.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: May 12, 2020
    Assignee: HANNSTAR DISPLAY CORPORATION
    Inventor: Mu-Kai Kang
  • Patent number: 10649566
    Abstract: The in-cell touch display panel has a display area and a non-display area. Multiple pixel structures are disposed in the display area. Transparent conductive layers, metal layers, and first to fourth insulation layers are disposed in the pixel structures. The thickness of the third insulation layer is greater than or equal to that of the second insulation layer. The thickness of the third insulation layer is 1.2 or more times of that of the fourth insulation layer. The thickness of the third insulation layer is greater than or equal to 5000 ?. The sum of the thickness of the third insulation layer and the thickness of the fourth insulation layer is greater than or equal to 7000 ?.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: May 12, 2020
    Assignees: HannStar Display (Nanjing) Corporation, HannStar Display Corporation
    Inventor: Cheng-Yen Yeh
  • Patent number: 10643522
    Abstract: In a shift register, a pre-charge unit is configured to receive a first input signal and output a pre-charge signal to a first node, a pull-up unit is configured to output a scan signal to a second node, and a pull-down unit is configured to receive a pull-down control signal. The pull-down control signal switches from a disable voltage to an enable voltage before the display panel switches from a non-display status to a display status.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: May 5, 2020
    Assignee: HannStar Display Corporation
    Inventors: Hsien-Tang Hu, Hsuan-Chen Liu, Chien-Ting Chan
  • Publication number: 20200133424
    Abstract: The invention provides a touch display apparatus including a display device, a polarizer device, and a touch device. The polarizer device and the touch device are stacked on the display device. The touch device has a substrate with a thickness-direction phase retardation value Rth, and 0 nm?|Rth|?100 nm. The touch display apparatus has high display quality under the irradiation of an ambient beam.
    Type: Application
    Filed: October 23, 2019
    Publication date: April 30, 2020
    Applicant: HannStar Display Corporation
    Inventors: Yen-Chung Chen, Wei-Chih Hsu
  • Patent number: 10636755
    Abstract: An electronic product includes a substrate and a bonding pad structure. The bonding pad structure is disposed on the substrate, and the bonding pad structure includes a first metal layer, a first insulating layer, at least one first connecting hole and a transparent conductive layer. The first metal layer and the first insulating layer are disposed on the substrate. The first connecting hole is situated in the first insulating layer, and the first connecting hole exposes a portion of the first metal layer. The transparent conductive layer is disposed on the first insulating layer, and the transparent conductive layer has a first edge and a second edge opposite to the first edge, wherein the transparent conductive layer is electrically connected to the first metal layer through the first connecting hole. A spacing between the first edge and the first connecting hole is greater than or equal to 100 ?m.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: April 28, 2020
    Assignee: HANNSTAR DISPLAY CORPORATION
    Inventors: Hsuan-Chen Liu, Yu-Tuan Hsu
  • Patent number: 10615183
    Abstract: An electronic device includes a first substrate, a second substrate, a plurality of first metal line segments and a shielding layer. The second substrate is opposite to the first substrate. The first metal line segments are disposed on the first substrate and extend along a first direction, wherein at least one of the first metal line segments includes a first alignment part and a first trace part, a width of the first alignment part is larger than a width of the first trace part, and the first alignment parts are arranged along a second direction. The shielding layer is disposed on the second substrate, and the shielding layer includes a plurality of first alignment structures, wherein one of the first alignment parts is aligned with one of the first alignment structures in a normal vector of the first substrate.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: April 7, 2020
    Assignee: HANNSTAR DISPLAY CORPORATION
    Inventors: Chung-Lin Chang, Hsuan-Chen Liu
  • Patent number: 10593283
    Abstract: The display panel includes a first substrate, a second substrate, pixel structures, a liquid crystal layer and a transparent conductive layer. The liquid crystal layer is disposed between the pixel structures and the second substrate. The transparent conductive layer is disposed between the second substrate and the liquid crystal layer. When a liquid crystal molecule of the liquid crystal layer is a positive liquid crystal molecule, an absolute voltage difference between the transparent conductive layer and the common electrode is smaller than or equal to 2.3 volts(V). When the liquid crystal molecule of the liquid crystal layer is a negative liquid crystal molecule, the absolute voltage difference between the transparent conductive layer and the common electrode is smaller than or equal to 5V.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: March 17, 2020
    Assignees: HannStar Display (Nanjing) Corporation, HannStar Display Corporation
    Inventors: Wei-Chih Hsu, Chen-Hao Su, Yu-Chen Liu
  • Patent number: 10579179
    Abstract: In a display panel, a first conducting layer is disposed on a substrate and has a touch sensing line. A first insulation layer is disposed on a first conducting layer with a first opening exposing the touch sensing line as a first connection part. A second insulation layer is disposed on the first insulation layer with a second opening. A first electrode is disposed on the second insulation layer with a third opening that is overlapped with the second opening. A third insulation layer is disposed on the first electrode with a fourth opening exposing the first electrode as a second connection part. The fourth opening overlaps with the third opening. A second electrode is disposed on the third insulation layer and is connected to the first connection part and the second connection part through the first to fourth openings.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: March 3, 2020
    Assignee: HannStar Display Corporation
    Inventors: Cheng-Yen Yeh, Kuo-Chang Su
  • Publication number: 20200057336
    Abstract: A reflective liquid crystal display panel including a plurality of pixel units is provided. Each pixel unit includes first and second substrates, one first signal line, four second signal lines, a liquid crystal layer, a first pixel structure, a second pixel structure, a third pixel structure and a fourth pixel structure. The first and second signal lines are disposed on the first substrate. The first, second, third, and fourth pixel structures are electrically connected to one of the four second signal lines respectively and electrically connected to the first signal line, where the first, second, third, and fourth pixel structures respectively include an active component and a reflective pixel electrode electrically connected to the active component, and a reflection area ratio of the first, second, third, and fourth pixel structures is 1:2:4:8. The second substrate is located opposite to the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate.
    Type: Application
    Filed: October 25, 2019
    Publication date: February 20, 2020
    Applicant: HannStar Display Corporation
    Inventors: Ming-Chang Yu, Cheng-Yen Yeh, Chen-Hao Su
  • Patent number: 10528161
    Abstract: A manufacturing method of a touch panel includes following steps. The first sensing electrodes and the second sensing electrodes are formed on a substrate first. Connecting bridges are formed next, wherein adjacent two first sensing electrodes are connected by at least one connecting bridge, and a manufacturing method of the connecting bridges includes following steps. A metal layer is formed on the substrate first, wherein a material of the metal layer includes silver. A photoresist layer is formed on a surface of the metal layer next, wherein a material of the photoresist layer includes sulfur. A photolithography process and an etching process are respectively performed on the photoresist layer and the metal layer to form the connecting bridges, wherein silver in the metal layer and sulfur in the photoresist layer react with each other to form a silver sulfide layer after the photoresist layer is formed.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: January 7, 2020
    Assignee: HANNSTAR DISPLAY CORPORATION
    Inventors: Chih-Wei Chen, Mei-Ling Chou, Yao-Chih Chuang
  • Patent number: 10509261
    Abstract: A reflective liquid crystal display panel including a plurality of pixel units is provided. Each pixel unit includes first and second substrates, one first signal line, four second signal lines, a liquid crystal layer, a first pixel structure, a second pixel structure, a third pixel structure and a fourth pixel structure. The first and second signal lines are disposed on the first substrate. The first, second, third, and fourth pixel structures are electrically connected to one of the four second signal lines respectively and electrically connected to the first signal line, where the first, second, third, and fourth pixel structures respectively include an active component and a reflective pixel electrode electrically connected to the active component, and a reflection area ratio of the first, second, third, and fourth pixel structures is one of 1:2:4:8 and 2:1:4:8. The second substrate is located opposite to the first substrate.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: December 17, 2019
    Assignee: HannStar Display Corporation
    Inventors: Ming-Chang Yu, Cheng-Yen Yeh, Chen-Hao Su
  • Patent number: 10504930
    Abstract: A reflective LCD panel includes a plurality of pixel units, each of which includes: first and second substrates, first and second scan lines, first and second data lines, a liquid crystal layer, and first, second, third, and fourth pixel structures. The first and second scan lines and the first and second data lines are disposed on the first substrate. Each of the first, second, third, and fourth pixel structures is electrically connected to one of the first and second scan lines and one of the first and second data lines, respectively. The first, second, third, and fourth pixel structures respectively include: an active component and a reflective pixel electrode electrically connected to the active component, and a reflective area ratio of the first, second, third, and fourth pixel structures is 1:2:4:8 or 2:1:4:8. Here, 16 gray scales may be displayed for achieving better visual effects.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 10, 2019
    Assignee: HannStar Display Corporation
    Inventors: Ming-Chang Yu, Cheng-Yen Yeh, Chen-Hao Su, Yu-Chen Liu
  • Patent number: 10495928
    Abstract: The in-cell touch display panel has a display area and a non-display area. Display IC bounding pads and touch pads are disposed in the non-display area. A touch electrode corresponds to more than one pixel structures. A touch sensing line is electrically connected to the touch electrode and one of the touch pads. A data line is electrically connected to a thin film transistor and one of the display pads. At least one of the display pads is disposed between two of the touch pads, and at least one of the touch pads is disposed between two of the display pads.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: December 3, 2019
    Assignees: HannStar Display (Nanjing) Corporation, HannStar Display Corporation
    Inventor: Cheng-Yen Yeh
  • Patent number: 10481448
    Abstract: A liquid crystal display device includes a plurality of pixel units, an electrode line surrounding the pixel units, at least one gate driver coupled with the pixel units via a plurality of gate lines, and at least one electrostatic discharge protection circuit coupled with the at least one gate driver and the electrode line.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: November 19, 2019
    Assignees: HANNSTAR DISPLAY (NANJING) CORPORATION, HANNSTAR DISPLAY CORPORATION
    Inventors: Chia-Hua Yu, Sung-Chun Lin, Hsuan-Chen Liu, Chien-Ting Chan
  • Patent number: 10466559
    Abstract: A pixel structure includes a first substrate, a thin-film transistor, a second insulation layer, a first transparent conduction layer and a second substrate. The thin-film transistor includes a gate electrode formed on the first substrate, a semiconductor layer formed on the gate electrode, a first insulation layer located between the semiconductor layer and the gate electrode, and an electrode layer including a source electrode and a drain electrode. The source electrode covers a portion of the semiconductor layer. The drain electrode covers a portion of the semiconductor layer. The second insulation layer covers the thin-film transistor. The first transparent conduction layer is formed on the second insulation layer. An opening is formed in the first transparent conduction layer along a fringe of the semiconductor layer.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: November 5, 2019
    Assignee: HANNSTAR DISPLAY CORPORATION
    Inventors: Hsuan-Chen Liu, Chung-Lin Chang