Patents by Inventor Shih-Chang Chang

Shih-Chang 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: 10741588
    Abstract: An electronic device may include a display having an array of display pixels on a substrate. The display pixels may be organic light-emitting diode display pixels or display pixels in a liquid crystal display. In an organic light-emitting diode display, hybrid thin-film transistor structures may be formed that include semiconducting oxide thin-film transistors, silicon thin-film transistors, and capacitor structures. The capacitor structures may overlap the semiconducting oxide thin-film transistors. Organic light-emitting diode display pixels may have combinations of oxide and silicon transistors. In a liquid crystal display, display driver circuitry may include silicon thin-film transistor circuitry and display pixels may be based on oxide thin-film transistors. A single layer or two different layers of gate metal may be used in forming silicon transistor gates and oxide transistor gates. A silicon transistor may have a gate that overlaps a floating gate structure.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: August 11, 2020
    Assignee: Apple Inc.
    Inventors: Vasudha Gupta, Jae Won Choi, Shih Chang Chang, Tsung-Ting Tsai, Young Bae Park
  • Patent number: 10714009
    Abstract: A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: July 14, 2020
    Assignee: Apple Inc.
    Inventors: Chin-Wei Lin, Hung Sheng Lin, Shih Chang Chang, Shinya Ono
  • Publication number: 20200220098
    Abstract: A display may have organic light-emitting diode pixels formed from thin-film circuitry. The thin-film circuitry may be formed in thin-film transistor (TFT) layers and the organic light-emitting diodes may include anodes and cathodes and an organic emissive layer formed over the TFT layers between the anodes and cathodes. The organic emissive layer may be formed via chemical evaporation techniques. The display may include moisture blocking structures such as organic emissive layer disconnecting structures that introduce one or more gaps in the organic emissive layer during evaporation so that any potential moisture permeating path from the display panel edge to the active area of the display is completely terminated.
    Type: Application
    Filed: October 31, 2019
    Publication date: July 9, 2020
    Inventors: Tsung-Ting Tsai, Abbas Jamshidi Roudbari, Chuan-Sheng Wei, HanChi Ting, Jae Won Choi, Jianhong Lin, Nai-Chih Kao, Shih Chang Chang, Shin-Hung Yeh, Takahide Ishii, Ting-Kuo Chang, Yu Hung Chen, Yu-Wen Liu, Yu-Chuan Pai, Andrew Lin
  • Patent number: 10707237
    Abstract: An electronic device may include a display having an array of display pixels on a substrate. The display pixels may be organic light-emitting diode display pixels or display pixels in a liquid crystal display. In an organic light-emitting diode display, hybrid thin-film transistor structures may be formed that include semiconducting oxide thin-film transistors, silicon thin-film transistors, and capacitor structures. The capacitor structures may overlap the semiconducting oxide thin-film transistors. Organic light-emitting diode display pixels may have combinations of oxide and silicon transistors. In a liquid crystal display, display driver circuitry may include silicon thin-film transistor circuitry and display pixels may be based on oxide thin-film transistors. A single layer or two different layers of gate metal may be used in forming silicon transistor gates and oxide transistor gates. A silicon transistor may have a gate that overlaps a floating gate structure.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: July 7, 2020
    Assignee: Apple Inc.
    Inventors: Vasudha Gupta, Jae Won Choi, Shih Chang Chang, Tsung-Ting Tsai, Young Bae Park
  • Patent number: 10642116
    Abstract: A display may include one or more display pixels in an array of pixels. A display pixel may include a storage capacitor chat stores a pixel data signal. The storage capacitor may be formed from a pixel electrode structure, a capacitor electrode structure, and a common electrode structure that is interposed between the pixel electrode structure and capacitor electrode structures. Each electrode structure may be formed from transparent conductive materials deposited on respective display layers. The pixel electrode structure and capacitor electrode structure may be electrically coupled by a conductive via structure that extends through the display layers without contacting the common electrode structure. The conductive via structure may contact underlying transistor structures such as a source-drain structure.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: May 5, 2020
    Assignee: APPLE INC.
    Inventors: Zhibing Ge, Lei Zhao, Ming-Chin Hung, Szu-Hsien Lee, Cheng Chen, Shih-Chang Chang
  • Patent number: 10644077
    Abstract: A display may have an array of pixels. Each pixel may have a light-emitting diode such as an organic light-emitting diode. The organic light-emitting diodes may each have an anode that is coupled to a thin-film transistor pixel circuit for controlling the anode. Transparent windows may be formed in the display. The windows may be formed by replacing data storage capacitors and other pixel circuit structures in a subset of the pixels with transparent window structures, by selectively removing portions of light-emitting diode anodes, and by shifting anodes. An array of electrical components such as an array of light sensors may be aligned with the transparent windows and may be used to measure light passing through the transparent windows.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: May 5, 2020
    Assignee: Apple Inc.
    Inventors: Minhyuk Choi, Rui Liu, Cheng Chen, Chin-Wei Lin, Sang Y. Youn, Shih Chang Chang, Tsung-Ting Tsai
  • Patent number: 10629131
    Abstract: This application relates to methods and apparatus for refreshing a display device at various frequencies. Specifically, multiple areas of the display device can be refreshed concurrently at different frequencies. In this way, when static content is being displayed in certain areas of the display device, those certain areas can be refreshed at a lower rate than areas displaying dynamic content such as video or animation. By refreshing at lower rates, the energy consumed by the display device and subsystems associated with the display device can be reduced. Additionally, processes for reducing flicker when refreshing the display device at different refresh rates are disclosed herein.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: April 21, 2020
    Assignee: Apple Inc.
    Inventors: Chaohao Wang, Szu-Hsien Lee, Paolo Sacchetto, Shih Chang Chang, Chun-Yao Huang, Paul S. Drzaic
  • Publication number: 20200118497
    Abstract: An electronic device may include a display such as a light-emitting diode display. The electronic device may be a head-mounted device that provides a virtual reality or augmented reality environment to a user. To reduce artifacts in the display, a display may be operable in both a normal scanning mode and a partial scanning mode. In the normal scanning mode, every row of the display may be enabled to emit light in each frame. In the partial scanning mode, only a subset of the rows of the display may be enabled to emit light in each frame. The display may have a higher refresh rate in the partial scanning mode than in the normal scanning mode. To ensure uniform transistor stress across the display, the scanning driver for the display may scan the disabled rows in the partial scanning mode even though the rows will not be used to emit light.
    Type: Application
    Filed: December 12, 2019
    Publication date: April 16, 2020
    Inventors: Keitaro Yamashita, Abbas Jamshidi Roudbari, Shin-Hung Yeh, Tsung-Ting Tsai, Shih-Chang Chang, Ting-Kuo Chang, Ki Yeol Byun, Warren S. Rieutort-Louis
  • Patent number: 10608075
    Abstract: An integrated circuit includes a capacitor located over a semiconductor substrate. The capacitor includes a first conductive layer having a first lateral perimeter, and a second conductive layer having a second smaller lateral perimeter. A first dielectric layer is located between the second conductive layer and the first conductive layer. The first dielectric layer has a thinner portion having the first lateral perimeter and a thicker portion having the second lateral perimeter. An interconnect line is located over the substrate, and includes a third conductive layer that is about coplanar with and has about a same thickness as the first conductive layer. A second dielectric layer is located over the third conductive layer. The second dielectric layer is about coplanar with and has about a same thickness as the thinner portion of the first dielectric layer.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: March 31, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bhaskar Srinivasan, Guru Mathur, Stephen Arlon Meisner, Shih Chang Chang, Corinne Ann Gagnet
  • Publication number: 20200081185
    Abstract: A semiconductor structure is disclosed. The semiconductor structure includes: a substrate and a gate element over the substrate. The gate element includes: a gate dielectric layer over the substrate; a gate electrode over the gate dielectric layer; and a waveguide passing through the gate electrode from a top surface of the gate electrode to a bottom surface of the gate electrode. A manufacturing method of the same is also disclosed.
    Type: Application
    Filed: November 13, 2019
    Publication date: March 12, 2020
    Inventors: YUNG-CHANG CHANG, CHUNG-YEN CHOU, MING-CHYI LIU, SHIH-CHANG LIU
  • Publication number: 20200074926
    Abstract: A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.
    Type: Application
    Filed: November 8, 2019
    Publication date: March 5, 2020
    Inventors: Chin-Wei Lin, Hung Sheng Lin, Shih Chang Chang, Shinya Ono
  • Publication number: 20200075636
    Abstract: An electronic device may include a display having an array of display pixels on a substrate. The display pixels may be organic light-emitting diode display pixels or display pixels in a liquid crystal display. In an organic light-emitting diode display, hybrid thin-film transistor structures may be formed that include semiconducting oxide thin-film transistors, silicon thin-film transistors, and capacitor structures. The capacitor structures may overlap the semiconducting oxide thin-film transistors. Organic light-emitting diode display pixels may have combinations of oxide and silicon transistors. In a liquid crystal display, display driver circuitry may include silicon thin-film transistor circuitry and display pixels may be based on oxide thin-film transistors. A single layer or two different layers of gate metal may be used in forming silicon transistor gates and oxide transistor gates. A silicon transistor may have a gate that overlaps a floating gate structure.
    Type: Application
    Filed: November 8, 2019
    Publication date: March 5, 2020
    Inventors: Vasudha Gupta, Jae Won Choi, Shih Chang Chang, Tsung-Ting Tsai, Young Bae Park
  • Patent number: 10576081
    Abstract: Systems and electronic displays with improved contrast even under bright-light conditions are provided. Such an electronic display may include a self-emissive pixel (e.g., OLED or ?-LED) with a corresponding liquid crystal switchable retarder pixel. A liquid crystal layer of the switchable retarder pixel may be tuned to an “on” state or an “off” state. In the “on” state, the switchable retarder pixel may allow outside light that enters the pixel to reflect back out of the pixel. This may add to the amount of light that appears to be emitted from that pixel. In the “off” state, the switchable retarder pixel may block the outside light that enters the pixel from reflecting back out of the pixel. This may reduce the amount of light that appears to be emitted from that pixel. Selectively controlling the switchable retarder pixels may allow for increased contrast even under bright-light conditions.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: March 3, 2020
    Assignee: Apple Inc.
    Inventors: Shih Chang Chang, Cheng Chen, Chin-Wei Lin, Donghee Nam, Meng-Huan Ho, Minhyuk Choi, Rui Liu
  • Patent number: 10546540
    Abstract: An electronic device may include a display such as a light-emitting diode display. The electronic device may be a head-mounted device that provides a virtual reality or augmented reality environment to a user. To reduce artifacts in the display, a display may be operable in both a normal scanning mode and a partial scanning mode. In the normal scanning mode, every row of the display may be enabled to emit light in each frame. In the partial scanning mode, only a subset of the rows of the display may be enabled to emit light in each frame. The display may have a higher refresh rate in the partial scanning mode than in the normal scanning mode. To ensure uniform transistor stress across the display, the scanning driver for the display may scan the disabled rows in the partial scanning mode even though the rows will not be used to emit light.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: January 28, 2020
    Assignee: Apple Inc.
    Inventors: Keitaro Yamashita, Abbas Jamshidi Roudbari, Shin-Hung Yeh, Tsung-Ting Tsai, Shih-Chang Chang, Ting-Kuo Chang, Ki Yeol Byun, Warren S. Rieutort-Louis
  • Publication number: 20200013342
    Abstract: An electronic device may include a display such as a light-emitting diode display. The electronic device may be a head-mounted device that provides a virtual reality or augmented reality environment to a user. To reduce artifacts in the display, a display may be operable in both a normal scanning mode and a partial scanning mode. In the normal scanning mode, every row of the display may be enabled to emit light in each frame. In the partial scanning mode, only a subset of the rows of the display may be enabled to emit light in each frame. The display may have a higher refresh rate in the partial scanning mode than in the normal scanning mode. To ensure uniform transistor stress across the display, the scanning driver for the display may scan the disabled rows in the partial scanning mode even though the rows will not be used to emit light.
    Type: Application
    Filed: September 20, 2019
    Publication date: January 9, 2020
    Inventors: Keitaro Yamashita, Abbas Jamshidi Roudbari, Shin-Hung Yeh, Tsung-Ting Tsai, Shih-Chang Chang, Ting-Kuo Chang, Ki Yeol Byun, Warren S. Rieutort-Louis
  • Patent number: 10509169
    Abstract: A semiconductor structure is disclosed. The semiconductor structure includes: a substrate and a gate element over the substrate. The gate element includes: a gate dielectric layer over the substrate; a gate electrode over the gate dielectric layer; and a waveguide passing through the gate electrode from a top surface of the gate electrode to a bottom surface of the gate electrode. A manufacturing method of the same is also disclosed.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: December 17, 2019
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Yung-Chang Chang, Chung-Yen Chou, Ming-Chyi Liu, Shih-Chang Liu
  • Patent number: 10504432
    Abstract: A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: December 10, 2019
    Assignee: Apple Inc.
    Inventors: Chin-Wei Lin, Hung Sheng Lin, Shih Chang Chang, Shinya Ono
  • Patent number: 10488980
    Abstract: Reduction of the effects of differences in parasitic capacitances in touch screens is provided. A touch screen can include multiple display pixels with stackups that each include a first element and a second element. For example, the first element can be a common electrode, and the second element can be a data line. The display pixels can include a first display pixel including a third element connected to the first element, and the third element can contribute to a first parasitic capacitance between the first and second elements of the first display pixel, for example, by overlapping with the second element. The touch screen can also include a second display pixel lacking the third element. The second display pixel can include a second parasitic capacitance between the first and second elements of the second display pixel. The first and second parasitic capacitances can be substantially equal, for example.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: November 26, 2019
    Assignee: Apple Inc.
    Inventors: Shih-Chang Chang, Steven P. Hotelling, Cheng-Ho Yu
  • Patent number: 10482822
    Abstract: An electronic device may include a display such as a light-emitting diode display. The electronic device may be a head-mounted device that provides a virtual reality or augmented reality environment to a user. To reduce artifacts in the display, a display may be operable in both a normal scanning mode and a partial scanning mode. In the normal scanning mode, every row of the display may be enabled to emit light in each frame. In the partial scanning mode, only a subset of the rows of the display may be enabled to emit light in each frame. The display may have a higher refresh rate in the partial scanning mode than in the normal scanning mode. To ensure uniform transistor stress across the display, the scanning driver for the display may scan the disabled rows in the partial scanning mode even though the rows will not be used to emit light.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: November 19, 2019
    Assignee: Apple Inc.
    Inventors: Keitaro Yamashita, Abbas Jamshidi Roudbari, Shin-Hung Yeh, Tsung-Ting Tsai, Shih-Chang Chang, Ting-Kuo Chang, Ki Yeol Byun, Warren S. Rieutort-Louis
  • Patent number: 10439020
    Abstract: A method of fabricating integrated circuits (ICs) includes depositing a dielectric liner layer on a substrate including a semiconductor surface having a plurality of IC die formed therein each including functional circuitry including a plurality of interconnected transistors. A thin film resistor (TFR) layer including chromium (Cr) is deposited on the dielectric liner layer. The substrate is loaded into a hardmask layer deposition tool that includes a plasma source. The TFR layer is in-situ plasma pre-treated including flowing at least one inert gas and at least one oxidizing gas while in the hardmask layer deposition tool. A hardmask layer is deposited after the plasma pre-treating while remaining in the hardmask layer deposition tool. A pattern is formed on the hardmask layer, and the hardmask layer and TFR layer are etched stopping in the dielectric liner layer to form at least one resistor from the defined TFR layer.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: October 8, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Abbas Ali, Dhishan Kande, Qi-Zhong Hong, Shih Chang Chang