Patents Assigned to Hannstar Display Corporation
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Patent number: 10976625Abstract: 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: GrantFiled: February 2, 2020Date of Patent: April 13, 2021Assignees: HannStar Display (Nanjing) Corporation, HannStar Display CorporationInventors: Wei-Chih Hsu, Chen-Hao Su, Yu-Chen Liu
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Patent number: 10915196Abstract: 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: GrantFiled: March 31, 2020Date of Patent: February 9, 2021Assignees: HannStar Display (Nanjing) Corporation, HannStar Display CorporationInventor: Cheng-Yen Yeh
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Patent number: 10885822Abstract: A gate driving circuit and a display panel with the gate driving circuit are provided. The gate driving circuit includes shift registers for providing scan signals to gate lines of the display panel. Each shift register includes a main circuit and a discharge circuit. In the main circuit, a pre-charge unit is coupled to a first node and is configured to output a pre-charge signal to the first node, a pull-up unit is coupled to the first node and a second node and is configured to output an mth stage scan signal of the 1st to Nth stage scan signals to the second node; and a reset unit is coupled to the first node and is configured to receive a reset signal. In the discharge circuit, a pull-down unit is coupled to the first node and the second node and is configured to receive a pull-down control signal.Type: GrantFiled: April 29, 2019Date of Patent: January 5, 2021Assignee: HannStar Display CorporationInventors: Hsien-Tang Hu, Hsuan-Chen Liu, Chien-Ting Chan
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Patent number: 10840265Abstract: A display panel includes a substrate having a display region and a peripheral region, first and second sub pixels, first and second gate driving units. The display region includes a first area having first scan lines and first sub pixels and a second area having second scan lines and second sub pixels. A portion of the first sub pixels and a portion of the second sub pixels are respectively electrically connected to the first and second scan line. The first gate driving unit includes a first driving transistor. The second gate driving unit includes a second driving transistor. The number of the first sub pixels driven by the first gate driving unit is less than the number of the second sub pixels driven by the second gate driving unit. The channel width of the first driving transistor is less than the channel width of the second driving transistor.Type: GrantFiled: August 1, 2019Date of Patent: November 17, 2020Assignee: HANNSTAR DISPLAY CORPORATIONInventors: Hsuan-Chen Liu, Chien-Ting Chan, Chung-Lin Chang
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Patent number: 10824255Abstract: 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: GrantFiled: December 12, 2019Date of Patent: November 3, 2020Assignee: HANNSTAR DISPLAY CORPORATIONInventors: Chih-Wei Chen, Mei-Ling Chou, Yao-Chih Chuang
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Patent number: 10788906Abstract: A manufacturing method of the flexible panel is provided. Firstly, a carrier substrate is provided. Then, an adhesion layer is formed on the carrier substrate, a flexible substrate is formed on the adhesion layer, and a buffer layer is formed on the flexible substrate. Then, a device layer is formed on the flexible substrate. Next, a separating process is performed for separating the flexible substrate and the device layer from the carrier substrate. According to a relation between a thermal expansion coefficient of the flexible substrate and a thermal expansion coefficient of the carrier substrate, the manufacturing method of the flexible panel selects a pattern of the adhesion layer. The pattern of the adhesion layer includes a frame adhesion structure or a plane adhesion structure.Type: GrantFiled: September 29, 2017Date of Patent: September 29, 2020Assignees: HannStar Display (Nanjing) Corporation, HANNSTAR DISPLAY CORPORATIONInventors: Yen-Chung Chen, Wei-Chih Hsu, Chen-Hao Su
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Patent number: 10783840Abstract: A display panel including a first substrate, a second substrate opposite to the first substrate, and a display medium located between the first substrate and the second substrate is provided. The display panel further includes a plurality of pixel structures, a plurality of data lines and a plurality of scan lines electrically connected to the pixel structures, a first driving unit located at a peripheral area, at least one test line, and at least one first pad located at the peripheral area. Each of the data lines has a first end and a second end opposite to each other. The first driving unit is electrically connected to the first ends of the data lines. The at least one test line is electrically connected to the second ends of at least part of the data lines. The at least one test line is grounded through the at least one first pad.Type: GrantFiled: August 28, 2018Date of Patent: September 22, 2020Assignee: HannStar Display CorporationInventors: Sung-Chun Lin, Hsien-Tang Hu, Hsuan-Chen Liu, Chien-Ting Chan
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Patent number: 10782559Abstract: 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: GrantFiled: October 25, 2019Date of Patent: September 22, 2020Assignee: HannStar Display CorporationInventors: Ming-Chang Yu, Cheng-Yen Yeh, Chen-Hao Su
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Patent number: 10775953Abstract: A in-cell touch display device includes first sensing lines, second sensing lines, first touch electrodes electrically connected to the first sensing lines respectively, second touch electrodes electrically connected to the second sensing lines respectively, first and second switches, and first and second touch testing pads. The first and second switches are disposed in a non-display area, in which the first switches have first terminals electrically connected to the first sensing lines, control terminals electrically connected to each other, and second terminals electrically connected to each other. The second switches have first terminals electrically connected to the second sensing lines, control terminals electrically connected to each other, and second terminals electrically connected to each other. The first touch testing pad is electrically connected to the second terminals of the first switches. The second touch testing pad is electrically connected to the second terminals of the second switches.Type: GrantFiled: January 3, 2018Date of Patent: September 15, 2020Assignees: HannStar Display (Nanjing) Corporation, HannStar Display CorporationInventor: Cheng-Yen Yeh
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Patent number: 10775674Abstract: A pixel structure includes a thin film transistor, a first insulating layer, a first transparent conductive layer, a second insulating layer, a connecting hole and a second transparent conductive layer. The thin film transistor is disposed on the substrate, and the thin film transistor includes a gate, a source and a drain. The first insulating layer, the first transparent conductive layer and the second insulating layer are disposed on the thin film transistor in sequence, and the first transparent conductive layer includes a pixel electrode. The connecting hole exposes a portion of the pixel electrode and a portion of the drain. The second transparent conductive layer is disposed on the second insulating layer, the second transparent conductive layer includes a common electrode and a connecting electrode electrically insulated to the common electrode, and the connecting electrode extends into the connecting hole.Type: GrantFiled: June 13, 2018Date of Patent: September 15, 2020Assignee: HANNSTAR DISPLAY CORPORATIONInventor: Cheng-Yen Yeh
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Patent number: 10775661Abstract: The present invention provides a touch display device. A thin film transistor and touch signal lines are disposed on a substrate. A first insulating layer, a first transparent conductive layer and a second insulating layer are disposed on the thin film transistor and the touch signal lines in sequence, wherein the first transparent conductive layer includes pixel electrodes. First connecting holes and second connecting holes are situated in the first insulating layer and the second insulating layer, each first connecting hole exposes a portion of the pixel electrode and a portion of the drain, and each second connecting hole exposes a portion of the touch signal line. A second transparent conductive layer is disposed on the second insulating layer, and includes touch electrodes and connecting electrodes electrically insulated from each other and respectively extending into the first connecting holes and the second connecting holes.Type: GrantFiled: May 3, 2019Date of Patent: September 15, 2020Assignee: HANNSTAR DISPLAY CORPORATIONInventors: Cheng-Yen Yeh, Kuo-Chang Su
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Patent number: 10755679Abstract: A gate driving circuit and a display panel with the gate driving circuit are provided. The gate driving circuit includes shift registers. The shift registers are configured to respectively provide scan signals to gate lines of a display panel. One of the shift registers includes a pre-charge unit, a pull-up unit and a reset unit. The pre-charge unit is coupled to a first node and is configured to output a pre-charge signal to the first node. The pull-up unit is coupled to the first node and a second node and is configured to output one of the scan signals to the second node. The reset unit is coupled to the first node and the second node and is configured to receive a reset signal. A voltage level of the reset signal switches after the gate driving circuit scans the gate lines sequentially in a frame period.Type: GrantFiled: April 11, 2018Date of Patent: August 25, 2020Assignee: HANNSTAR DISPLAY CORPORATIONInventors: Sung-Chun Lin, Chien-Ting Chan
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Patent number: 10747350Abstract: A touch display device includes thin film transistors, a first insulating layer, a first transparent conductive layer, a second insulating layer, contact holes, a second transparent conductive layer, and touch signal lines. The first transparent conductive layer includes pixel electrodes, and each pixel electrode is electrically connected to a drain of one of the thin film transistors. The contact holes penetrate the first insulating layer and the second insulating layer. Each contact hole exposes a portion of the pixel electrode and a portion of the drain. The second transparent conductive layer includes touch electrodes and connecting electrodes. Each connecting electrode extends into one of the contact holes, and is in contact with the portion of the pixel electrode and the portion of the drain. Each touch signal line is electrically to a corresponding touch electrode.Type: GrantFiled: February 24, 2019Date of Patent: August 18, 2020Assignee: HANNSTAR DISPLAY CORPORATIONInventors: I-Hsuan Chen, Mu-Kai Kang, Cheng-Yen Yeh
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Patent number: 10718979Abstract: 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: GrantFiled: October 5, 2019Date of Patent: July 21, 2020Assignees: HannStar Display (Nanjing) Corporation, HannStar Display CorporationInventor: Cheng-Yen Yeh
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Patent number: 10718967Abstract: A capacitive touch display panel includes sensing electrode columns and sensing electrode signal wire groups. Each of the sensing electrode columns includes sensing electrodes. The sensing electrode signal wire groups are electrically connected to the sensing electrode columns, in which each of the sensing electrode signal wire groups consists of at least one first sub-signal wire group and at least one second sub-signal wire group, in which the first sub-signal wire group includes N sensing electrode signal wires, and the second sub-signal wire group includes N+1 sensing electrode signal wires, N is a positive integer. Consequently, the capacitive touch display panel of the present invention can improve the active load balance and the optical characteristics of the capacitive touch display panel.Type: GrantFiled: April 28, 2017Date of Patent: July 21, 2020Assignee: HannStar Display CorporationInventor: Cheng-Yen Yeh
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Patent number: 10714203Abstract: 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: GrantFiled: August 23, 2018Date of Patent: July 14, 2020Assignees: HannStar Display (Nanjing) Corporation, HannStar Display CorporationInventor: Chien-Ting Chan
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Patent number: 10705661Abstract: 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: GrantFiled: November 1, 2018Date of Patent: July 7, 2020Assignee: HannStar Display CorporationInventors: Hsing-Ying Lee, Cheng-Yen Yeh, Wei-Chih Hsu
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Patent number: 10700020Abstract: 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: GrantFiled: February 25, 2018Date of Patent: June 30, 2020Assignee: HANNSTAR DISPLAY CORPORATIONInventors: Sung-Chun Lin, Hsien-Tang Hu, Hsuan-Chen Liu, Chien-Ting Chan
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Patent number: 10663822Abstract: 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: GrantFiled: April 23, 2019Date of Patent: May 26, 2020Assignee: HannStar Display CorporationInventor: Cheng-Yen Yeh
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Patent number: 10656434Abstract: 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: GrantFiled: July 6, 2017Date of Patent: May 19, 2020Assignees: HannStar Display (Nanjing) Corporation, HannStar Display CorporationInventors: Yu-Chen Liu, Wei-Chih Hsu, Yen-Chung Chen