Patents by Inventor Wei-Chih Chang

Wei-Chih Chang 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: 11129239
    Abstract: The wireless communication device includes one or more wireless transceivers and a controller. The one or more wireless transceivers detect(s) one or more first frequency bands of one or more cellular networks, and detect(s) one or more second frequency bands of one or more non-cellular networks. The controller selects one of the first frequency bands and one of the second frequency bands, which do not overlap, and assigns the selected first frequency band to one of the wireless transceivers, thereby enabling one of the wireless transceivers to camp on a cell on the selected first frequency band. Also, the controller assigns the selected second frequency band to one of the wireless transceivers, thereby enabling one of the wireless transceivers to connect to one of the non-cellular networks on the selected second frequency band.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: September 21, 2021
    Assignee: MEDIATEK INC.
    Inventors: Wei-Lun Liu, Sheng-Kai Chang, I-Ching Hsieh, Yen-Chih Yang, Teng-Wei Huang, Tzu-Shiang Hsu, Tzu-Yu Lee, Tsung-Yueh Chiang
  • Patent number: 11117323
    Abstract: A vat heating device is provided, including a vat and a heater. The vat has a bottom plate. The vat is used to accommodate a photosensitive resin. The heater is disposed on the bottom plate, adjacent to the photosensitive resin. The heater is used to heat the photosensitive resin. The heater is on an optical path of a light source for curing the photosensitive resin. A photocuring three-dimensional molding system containing the above vat heating device is also provided.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: September 14, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Keh-Su Chang, Yen-I Chou, Jau-Shiu Chen, Sheng-Kai Hsiao, Wei-Chih Hsiao, Chun-Fang Hsu
  • Patent number: 11114387
    Abstract: An electronic package structure is provided. The electronic packaging structure includes a substrate, a conductive layer disposed on the substrate, an intermetallic compound disposed on the conductive layer, a stress buffering material disposed on the substrate and adjacent to the conductive layer, and an electronic device disposed on the conductive layer and the stress buffering material. The intermetallic compound is disposed between the electronic device and the conductive layer, between the electronic device and the stress buffering material, between the substrate and the stress buffering material, and between the conductive layer and the stress buffering material.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: September 7, 2021
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Jing-Yao Chang, Tao-Chih Chang, Fang-Jun Leu, Wei-Kuo Han, Kuo-Shu Kao
  • Publication number: 20210274627
    Abstract: A target droplet source for an extreme ultraviolet (EUV) source includes a droplet generator configured to generate target droplets of a given material. The droplet generator includes a nozzle configured to supply the target droplets in a space enclosed by a chamber. The target droplet source further includes a sleeve disposed in the chamber distal to the nozzle. The sleeve is configured to provide a path for the target droplets in the chamber.
    Type: Application
    Filed: May 17, 2021
    Publication date: September 2, 2021
    Inventors: Wei-Chih LAI, Han-Lung CHANG, Chi YANG, Shang-Chieh CHIEN, Bo-Tsun LIU, Li-Jui CHEN, Po-Chung CHENG
  • Patent number: 11088120
    Abstract: A method for making a micro LED display panel not requiring high-accuracy or individual positioning includes providing a carrier substrate with micro LEDs, providing a TFT substrate including a driving circuit, and forming a conductive connecting element, an insulating layer, and a contact electrode layer on the TFT substrate. The insulating layer and the contact electrode layer are patterned to define a through hole, the first electrode is placed against the contact electrode layer, and different voltages Vref and Vdd are applied to the contact electrode layer and to the conductive connecting element respectively, creating an electrostatic attraction. The micro LEDs and the first electrode are transferred from the carrier substrate onto the TFT substrate; and the conductive connecting element is bonded to the first electrode. The method of making is simple. A micro LED display panel made by the method is also provided.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: August 10, 2021
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Wei-Chih Chang, Kuo-Sheng Lee, Chung-Wen Lai, Po-Fu Chen
  • Patent number: 11069669
    Abstract: A micro LED display panel includes a blue LED layer, a green LED layer, and a red LED layer. The blue LED layer, the green LED layer, and the red LED layer are in a stacked formation. The blue, the green, and the red LED layers each include a plurality of micro LEDs spaced apart from each other. The composition of the layers is such that light emitted from all but the bottom layer is able to pass through transparent material in other layers before exiting the panel and being viewed.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: July 20, 2021
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Wei-Chih Chang, Chung-Wen Lai
  • Publication number: 20210109092
    Abstract: A sensor using ultrasound to detect presence and nature of analyte includes an ultrasonic element and a receptor thereon. The ultrasonic element includes a first electrode, a second electrode facing and spaced apart from the first electrode, an insulating layer between the first electrode and the second electrode, and a vibrating film between the insulating layer and the first electrode. The vibrating film carries the first electrode. A cavity is formed between the vibrating film and the insulating layer. The receptor is on a side of the first electrode away from the second electrode. The receptor can combine with a target substance in a test analyte. When the first electrode and the second electrode are applied with different voltages, certain ultrasound frequencies are generated as the vibrating film vibrates, and the presence and weight of different target substances are indicated by the changes in resonance.
    Type: Application
    Filed: March 30, 2020
    Publication date: April 15, 2021
    Inventors: HSIN-HUA LIN, WEI-CHIH CHANG, PO-LI SHIH, CHAO-CHUN YANG, I-MIN LU
  • Patent number: 10937881
    Abstract: A gas sensor with instantaneous electrical response and thus detection of gas which meets it includes a substrate, a bottom gate electrode on a surface of the substrate, an insulating layer on the surface of the substrate carrying the bottom gate electrode and completely covering the bottom gate electrode. A semiconductor layer is on a surface of the insulating layer away from the substrate. Both the source electrode and the drain electrode, spaced apart, are located on a side of the semiconductor layer away from the substrate each being coupled to the semiconductor layer. The gas sensor further includes a passivation layer covering the semiconductor layer and a top gate electrode on the passivation layer, the top gate electrode being spaced from both the source and drain electrodes. The top gate electrode is made of electrically-conductive and gas-sensitive material. A method for making same is also disclosed.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: March 2, 2021
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Wei-Chih Chang, Hsin-Hua Lin, Po-Li Shih
  • Patent number: 10854587
    Abstract: A micro LED display panel defines a display area and a border area surrounding the display area. The micro LED display panel includes a TFT array substrate, a plurality of micro LEDs on the TFT array substrate, a common electrode on the TFT array substrate, the common electrode covering and electrically coupling to all of the micro LEDs; a metal layer on a side of the common electrode away from the TFT array substrate and electrically coupling to the common electrode, and a black photoresist layer on a side of the metal layer away from the TFT array substrate. The black photoresist layer defines through holes. Each through hole extends through both the black photoresist layer and the metal layer and aligns with one micro LED. The metal layer and the black photoresist layer cover the display area and the border area.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: December 1, 2020
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Po-Fu Chen, I-Wei Wu, I-Min Lu, Wei-Chih Chang
  • Patent number: 10749039
    Abstract: A high-performance TFT substrate (100) for a flat panel display includes a substrate (110), a first conductive layer (130) on the substrate (110), a semiconductor layer (103) positioned on the first conductive layer (130), and a second conductive layer (150) positioned on the semiconductor layer (103). The first conductive layer (130) defines a gate electrode (101). The second conductive layer (150) defines a source electrode (105) and a drain electrode (106) spaced apart from the source electrode (105). The second conductive layer (150) includes a first layer (151) on the semiconductor layer (103) and a second layer (152) positioned on the first layer (151). The first layer (151) can be made of metal oxide. The second layer (152) can be made of aluminum or aluminum alloy.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: August 18, 2020
    Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Yi-Chun Kao, Po-Li Shih, Wei-Chih Chang, I-Wei Wu
  • Patent number: 10727309
    Abstract: A thin film transistor array panel includes a first conductive layer (102) including a gate electrode; a channel layer (104) disposed over the gate; and a second conductive layer (105) disposed over the channel layer (104). The second conductive layer (105) includes a multi-layered portion defining a source electrode (105a) and a drain electrode (105b), which includes a first sub-layer (105-1), a second sub-layer (105-2), and a third sub-layer (105-3) sequentially disposed one over another. Both the third and the first sub-layers (105-3, 105-1) include indium and zinc oxide materials. An indium to zinc content ratio in the first sub-layer (105-1) is greater than that in the third sub-layer (105-3).
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: July 28, 2020
    Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Yi-Chun Kao, Hsin-Hua Lin, Po-Li Shih, Wei-Chih Chang, I-Min Lu, I-Wei Wu
  • Patent number: 10707266
    Abstract: A micro LED display panel able to display images from opposite surfaces includes a substrate, a pixel circuit layer on the substrate, an insulating layer on the pixel circuit layer, at least two micro LEDs on the insulating layer and embedded in the insulating layer, at least two first electrodes, and at least one second electrode. The pixel circuit layer includes at least two TFTs. Each micro LED includes a first end adjacent to the pixel circuit layer and a second end opposite to the first end and exposed from the insulating layer. Each first electrode is between the first end of each micro LED and the pixel circuit layer. The second electrode covers the second end of each micro LED and is transparent. Each first electrode defines a light transmitting region to allow light emitted from the micro LED to pass through.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: July 7, 2020
    Assignee: Century Micro Display Technology (Shenzhen) Co., Ltd.
    Inventors: Wei-Chih Chang, Chung-Wen Lai
  • Publication number: 20200209187
    Abstract: A gas sensor with instantaneous electrical response and thus detection of gas which meets it includes a substrate, a bottom gate electrode on a surface of the substrate, an insulating layer on the surface of the substrate carrying the bottom gate electrode and completely covering the bottom gate electrode. A semiconductor layer is on a surface of the insulating layer away from the substrate. Both the source electrode and the drain electrode, spaced apart, are located on a side of the semiconductor layer away from the substrate each being coupled to the semiconductor layer. The gas sensor further includes a passivation layer covering the semiconductor layer and a top gate electrode on the passivation layer, the top gate electrode being spaced from both the source and drain electrodes. The top gate electrode is made of electrically-conductive and gas-sensitive material. A method for making same is also disclosed.
    Type: Application
    Filed: December 26, 2019
    Publication date: July 2, 2020
    Inventors: WEI-CHIH CHANG, HSIN-HUA LIN, PO-LI SHIH
  • Publication number: 20200184181
    Abstract: A LCD device defining a display area includes a color filter substrate, a thin film transistor (TFT) substrate facing the color filter substrate, a backlight module on a side of the TFT substrate away from the color filter substrate, a transparent cover on a side of the color filter substrate away from the TFT substrate, and a fingerprint sensor in the display area. The fingerprint sensor defines a fingerprint sensing area in the display area. The LCD device further includes a light emitting diode on a side of the transparent cover adjacent to the color filter substrate. The light emitting diode is configured to emit light toward the fingerprint sensing area of the transparent cover.
    Type: Application
    Filed: December 2, 2019
    Publication date: June 11, 2020
    Inventors: WEI-CHIH CHANG, KUO-SHENG LEE, I-MIN LU
  • Publication number: 20200184183
    Abstract: A LCD device defining a display area includes a color filter substrate, a thin film transistor (TFT) substrate facing the color filter substrate, a backlight module on a side of the TFT substrate away from the color filter substrate, a transparent cover on a side of the color filter substrate away from the TFT substrate, and a fingerprint sensor in the display area. The fingerprint sensor defines a fingerprint sensing area in the display area. The LCD device further includes a light emitting diode on a side of the transparent cover adjacent to the color filter substrate. The light emitting diode is configured to emit light toward the fingerprint sensing area of the transparent cover.
    Type: Application
    Filed: December 2, 2019
    Publication date: June 11, 2020
    Inventors: WEI-CHIH CHANG, KUO-SHENG LEE, I-MIN LU
  • Patent number: 10672880
    Abstract: A conductive layer for a thin film transistor (TFT) array panel includes a multi-layered portion defining a source electrode and a drain electrode of a TFT device, and includes a first sub-layer, a second sub-layer, a third sub-layer, and at least one additional sub-layer. The third and the first sub-layers include indium and zinc oxide materials. An indium to zinc content ratio in the first sub-layer is greater than that in the third sub-layer. An indium to zinc content ratio in the additional sub-layer is formulated between that in the first and the third sub-layers. The content ratio differentiation between the first and the third sub-layers affects a lateral etch profile associated with a gap generated in the second conductive layer between the source and the drain electrodes, where the associated gap width in the third sub-layer is wider than that in the first sub-layer.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: June 2, 2020
    Assignees: HONG FU JIN PRECISION INDUSTRY (SheZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Po-Li Shih, Yi-Chun Kao, Hsin-Hua Lin, Chih-Lung Lee, Wei-Chih Chang, I-Min Lu
  • Publication number: 20200144240
    Abstract: A micro LED display panel includes a blue LED layer, a green LED layer, and a red LED layer. The blue LED layer, the green LED layer, and the red LED layer are in a stacked formation. The blue, the green, and the red LED layers each include a plurality of micro LEDs spaced apart from each other. The composition of the layers is such that light emitted from all but the bottom layer is able to pass through transparent material in other layers before exiting the panel and being viewed.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Inventors: Wei-Chih Chang, Chung-Wen Lai
  • Patent number: 10586789
    Abstract: A micro LED display panel with enhanced display properties includes a substrate, a plurality of micro LEDs on the substrate, at least one common electrode, and a plurality of contact electrodes. Each micro LED includes top and bottom ends and a sidewall between them. The common electrode is coupled to the top end and a contact electrode is coupled to the bottom end. An adjustment electrode insulated from the other electrodes is formed on the sidewall of each of the plurality of micro LEDs; the adjustment electrode being fed with a DC voltage creates an electric field limiting the direction of flow of charge carriers within each micro LED and thereby improving performance.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: March 10, 2020
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: I-Wei Wu, Wei-Chih Chang, Chung-Wen Lai, Sheng-Han Li
  • Publication number: 20200058631
    Abstract: A micro LED display panel defines a display area and a border area surrounding the display area. The micro LED display panel includes a TFT array substrate, a plurality of micro LEDs on the TFT array substrate, a common electrode on the TFT array substrate, the common electrode covering and electrically coupling to all of the micro LEDs; a metal layer on a side of the common electrode away from the TFT array substrate and electrically coupling to the common electrode, and a black photoresist layer on a side of the metal layer away from the TFT array substrate. The black photoresist layer defines through holes. Each through hole extends through both the black photoresist layer and the metal layer and aligns with one micro LED. The metal layer and the black photoresist layer cover the display area and the border area.
    Type: Application
    Filed: July 29, 2019
    Publication date: February 20, 2020
    Inventors: PO-FU CHEN, I-WEI WU, I-MIN LU, WEI-CHIH CHANG
  • Patent number: 10559557
    Abstract: A micro LED display panel includes a blue LED layer, a green LED layer, and a red LED layer. The blue LED layer, the green LED layer, and the red LED layer are in a stacked formation. The blue, the green, and the red LED layers each include a plurality of micro LEDs spaced apart from each other. The composition of the layers is such that light emitted from all but the bottom layer is able to pass through transparent material in other layers before exiting the panel and being viewed.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: February 11, 2020
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Wei-Chih Chang, Chung-Wen Lai