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).
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Publication number: 20210225283Abstract: 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: ApplicationFiled: April 5, 2021Publication date: July 22, 2021Inventors: Chin-Wei Lin, Hung Sheng Lin, Shih Chang Chang, Shinya Ono
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Publication number: 20210187985Abstract: A system of assessing performance of a photocuring light source includes a photocuring light source unit, a light source control unit, a sensing unit, and a computer unit. The light source unit produces light rays on a work platform of a printing machine. The light source control unit is electrically coupled to and controls the light source unit. The sensing unit is disposed proximally to the light source unit to detect power of the light rays from the light source unit. The computer unit is electrically coupled to the sensing unit and the light source control unit to control the light source unit and record the power of the light rays and operating period of the light source unit. A combination having the system is also disclosed.Type: ApplicationFiled: March 24, 2020Publication date: June 24, 2021Applicant: Printing Technology Research InstituteInventors: Shih-Chang CHANG, Chia-Bin CHUEH, Kang-Yu LIU, Yen-Ping WANG
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Publication number: 20210142736Abstract: An electronic device such as a head-mounted device may have displays. The display may have regions of lower and higher resolution to reduce data bandwidth and power consumption for the display while preserving satisfactory image quality. Data lines may be shared by lower and higher resolution portions of a display or different portions of a display with different resolutions may be supplied with different numbers of data lines. Data line length may be varied in transition regions between lower resolution and higher resolution portions of a display to reduce visible discontinuities between the lower and higher resolution portions. The lower and higher resolution portions of the display may be dynamically adjusted using dynamically adjustable gate driver circuitry and dynamically adjustable data line driver circuitry.Type: ApplicationFiled: January 15, 2021Publication date: May 13, 2021Inventors: Cheng Chen, Jason C. Sauers, Fletcher R. Rothkopf, David W. Lum, Chun-Yao Huang, Enkhamgalan Dorjgotov, Graham B. Myhre, Bennett S. Wilburn, Paolo Sacchetto, Shih Chang Chang, Wonjae Choi, Cheuk Chi Lo
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Patent number: 10997917Abstract: 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: GrantFiled: June 9, 2020Date of Patent: May 4, 2021Assignee: Apple Inc.Inventors: Chin-Wei Lin, Hung Sheng Lin, Shih Chang Chang, Shinya Ono
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Patent number: 10998344Abstract: 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: GrantFiled: June 30, 2020Date of Patent: May 4, 2021Assignee: Apple Inc.Inventors: Vasudha Gupta, Jae Won Choi, Shih Chang Chang, Tsung-Ting Tsai, Young Bae Park
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Patent number: 10971074Abstract: 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: GrantFiled: December 12, 2019Date of Patent: April 6, 2021Assignee: 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
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Publication number: 20210098565Abstract: In some examples, an integrated circuit comprises a substrate; a first metal layer and a second metal layer positioned above the substrate; a first composite dielectric layer located on the first metal layer, wherein the first composite dielectric layer comprises a first anti-reflective coating; a second composite dielectric layer positioned on the second metal layer, wherein the second composite dielectric layer comprises a second anti-reflective coating; and a capacitor metal layer disposed over the first composite dielectric layer.Type: ApplicationFiled: September 26, 2019Publication date: April 1, 2021Inventors: Poornika FERNANDES, David Matthew CURRAN, Stephen Arlon MEISNER, Bhaskar SRINIVASAN, Guruvayurappan S. MATHUR, Scott William JESSEN, Shih Chang CHANG, Russell Duane FIELDS, Thomas Terrance LYNCH
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Patent number: 10955947Abstract: A touch sensor panel comprising a first touch node electrode of a plurality of touch node electrodes, the first touch node electrode coupled to a first sense connection comprising a first set of traces, the first sense connection configured to have a first resistance per unit length that varies along a length of the first sense connection, and a second touch node electrode of the plurality of touch node electrodes, the second touch node electrode coupled to a second sense connection comprising a second set of traces, the second sense connection configured to have a second resistance per unit length that varies along a length of the second sense connection differently than the first resistance per unit length varies along the length of the first sense connection. An effective resistance of the first sense connection and the second sense connection are equal.Type: GrantFiled: April 21, 2017Date of Patent: March 23, 2021Assignee: Apple Inc.Inventors: Patrick Bennett, Byung Duk Yang, Chun-Yao Huang, Hao-Lin Chiu, Ivan Knez, Peien Chang, Rungrot Kitsomboonloha, Shih-Chang Chang, Shinya Ono, Szuhsien Lee
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Publication number: 20210066505Abstract: Display panels with hydrogen trap layers are described. The hydrogen trap layers may be incorporated into a variety of locations to getter or block hydrogen diffusion into the semiconductor oxide layer of an oxide transistor.Type: ApplicationFiled: January 17, 2020Publication date: March 4, 2021Inventors: Jehun Lee, Ching-Sang Chuang, Hirokazu Yamagata, Jiun-Jye Chang, Kenny Kim, Po-Chun Yeh, Shih Chang Chang, Ting-Kuo Chang
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Patent number: 10930219Abstract: An electronic device such as a head-mounted device may have displays. The display may have regions of lower (L) and higher (M, H) resolution to reduce data bandwidth and power consumption for the display while preserving satisfactory image quality. Data lines may be shared by lower and higher resolution portions of a display or different portions of a display with different resolutions may be supplied with different numbers of data lines. Data line length may be varied in transition regions between lower resolution and higher resolution portions of a display to reduce visible discontinuities between the lower and higher resolution portions. The lower and higher resolution portions of the display may be dynamically adjusted using dynamically adjustable gate driver circuitry and dynamically adjustable data line driver circuitry.Type: GrantFiled: August 14, 2017Date of Patent: February 23, 2021Assignee: Apple Inc.Inventors: Cheng Chen, Jason C. Sauers, Fletcher R. Rothkopf, David W. Lum, Chun-Yao Huang, Enkhamgalan Dorjgotov, Graham B. Myhre, Bennett S. Wilburn, Paolo Sacchetto, Shih Chang Chang, Wonjae Choi, Cheuk Chi Lo
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Publication number: 20210050385Abstract: An electronic device includes a stack, and the stack includes a substrate, and a multi-layer structure deposited on the substrate and including a set of TFTs. The electronic device further includes a photodetector attached to the multi-layer structure and including an organic photosensitive material. The organic photosensitive material is electrically connected to a TFT in the set of TFTs. Another electronic device includes a stack, and the stack includes a substrate, and a multi-layer structure deposited on the substrate. The multi-layer structure includes a first set of layers including a set of TFTs, and a second set of layers including a PIN diode. The PIN diode is configured to operate as a photodetector and receive at least one wavelength of electromagnetic radiation, and is electrically connected to a TFT in the set of TFTs.Type: ApplicationFiled: July 31, 2020Publication date: February 18, 2021Inventors: Ching-Sang Chuang, Jiun-Jye Chang, Po-Chun Yeh, Shih Chang Chang, Ting-Kuo Chang, Yun Wang
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Patent number: 10923012Abstract: An electronic device may include a display. The display may include display driver circuitry that is configured to provide image data to columns of pixels and gate driver circuitry that is configured to provide control signals to rows of pixels. The display may be operable at a native refresh rate that is equal to the highest refresh rate at which the display has full resolution. The display may also be operable in a high refresh rate mode with a high refresh rate that is twice (or some other scaling factor greater than) the native refresh rate. To enable operation at the high refresh rate mode, vertical resolution of the display may be sacrificed. In other words, rows of pixels may be grouped together into effective rows that are then scanned in sequence. The gate driver circuitry may be formed as thin-film transistor circuitry or from gate driver integrated circuits.Type: GrantFiled: March 10, 2020Date of Patent: February 16, 2021Assignee: Apple Inc.Inventors: Jiaxi Hu, Hao-Lin Chiu, Shatam Agarwal, Kwang Soon Park, Joonggun Lee, Kyung Wook Kim, Shih Chang Chang, Fenghua Zheng
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Publication number: 20210035499Abstract: Electronic devices may include displays having organic light-emitting diode pixels, display driver circuitry, and gate driver circuitry. To reduce the amount of space occupied in the inactive area of a display by the gate driver circuitry, one or more of the shift registers in the gate driver circuitry may include register circuits that are shared by multiple rows of pixels. Different drivers may use different clock frequencies to ensure synchronous operation of the display even when some register circuits share pixel rows. For increased flexibility in the arrangement of the register circuits in the shift registers, one or more of the shift registers may be split across the active area of the display. In some cases, one of the emission drivers may be omitted from the gate driver circuitry and a single emission driver may provide multiple emission control signals for the pixels.Type: ApplicationFiled: March 24, 2020Publication date: February 4, 2021Inventors: Chuang Qian, Tsung-Ting Tsai, Shyuan Yang, Cheng-Chih Hsieh, Abbas Jamshidi Roudbari, Ting-Kuo Chang, Shih-Chang Chang
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Patent number: 10896642Abstract: Electronic devices may include displays having organic light-emitting diode pixels, display driver circuitry, and gate driver circuitry. To reduce the amount of space occupied in the inactive area of a display by the gate driver circuitry, one or more of the shift registers in the gate driver circuitry may include register circuits that are shared by multiple rows of pixels. Different drivers may use different clock frequencies to ensure synchronous operation of the display even when some register circuits share pixel rows. For increased flexibility in the arrangement of the register circuits in the shift registers, one or more of the shift registers may be split across the active area of the display. In some cases, one of the emission drivers may be omitted from the gate driver circuitry and a single emission driver may provide multiple emission control signals for the pixels.Type: GrantFiled: March 24, 2020Date of Patent: January 19, 2021Assignee: Apple Inc.Inventors: Chuang Qian, Tsung-Ting Tsai, Shyuan Yang, Cheng-Chih Hsieh, Abbas Jamshidi Roudbari, Ting-Kuo Chang, Shih-Chang Chang
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Publication number: 20210008585Abstract: A nozzle includes a body and a spoiler. The body has a fluid path, and an inlet and a spray orifice respectively located at opposite two sides of the fluid path. The spoiler is detachably disposed in the fluid path, and includes a barrier plate parallel to the inlet, wherein the barrier plate has grooves, and each groove has a through hole.Type: ApplicationFiled: July 10, 2019Publication date: January 14, 2021Inventors: Yuan Hse Chang, Shih Chang Chang
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Publication number: 20200411633Abstract: In some examples, an integrated circuit includes an isolation layer disposed on or over a semiconductor substrate. The integrated circuit also includes a first conductive plate located over the isolation layer and a composite dielectric layer located over the first conductive plate. The composite dielectric layer includes a first sublayer comprising a first chemical composition; a second sublayer comprising a second different chemical composition; and a third sublayer comprising a third chemical composition substantially similar to the first chemical composition. The integrated circuit further includes a second conductive plate located directly on the composite dielectric layer above the first conductive plate.Type: ApplicationFiled: June 26, 2019Publication date: December 31, 2020Inventors: Guruvayurappan S. MATHUR, Abbas ALI, Poornika FERNANDES, Bhaskar Srinivasan, Darrell R. Krumme, Joao Sergio Afonso, Shih-Chang Chang, Shariq Arshad
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Publication number: 20200393715Abstract: Electrical shield line systems are provided for openings in common electrodes near data lines of display and touch screens. Some displays, including touch screens, can include multiple common electrodes (Vcom) that can have openings between individual Vcoms. Some display screens can have an open slit between two adjacent edges of Vcom. Openings in Vcom can allow an electric field to extend from a data line through the Vcom layer. A shield can be disposed over the Vcom opening to help reduce or eliminate an electric field from affecting a pixel material, such as liquid crystal. The shield can be connected to a potential such that electric field is generated substantially between the shield and the data line to reduce or eliminate electric fields reaching the liquid crystal.Type: ApplicationFiled: August 28, 2020Publication date: December 17, 2020Inventors: Zhibing GE, Cheng-Ho YU, Young-Bae PARK, Abbas JAMSHIDI ROUDBARI, Shih-Chang CHANG, Cheng CHEN, Marduke YOUSEFPOR, John Z. ZHONG
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Patent number: 10852876Abstract: A touch screen is disclosed that includes conductive elements in a display area and connecting traces for routing the conductive elements to other locations. The connecting traces can be routed underneath or over existing opaque structures in the display area, instead of in border areas adjacent to the display area, to minimize the effect of the connecting traces on the display aperture ratio. The lengths and/or widths of these connecting traces as well as the number of parallel connecting traces used to connect to a particular element can be selected to balance the load on the drive and/or sense circuitry and on display pixels caused by the connecting traces.Type: GrantFiled: September 23, 2014Date of Patent: December 1, 2020Assignee: Apple Inc.Inventors: Abbas Jamshidi-Roudbari, Cheng-Ho Yu, Shih-Chang Chang, Ting-Kuo Chang
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Patent number: 10839733Abstract: A display may have an array of pixels arranged in rows and columns. Display driver circuitry may be provided along an edge of the display. Data lines that are associated with columns of the pixels may be used to distribute data from the display driver circuitry to the pixels. Gate lines in the display may each have a horizontal straight portion that extends along a respective row of the pixels and may each have one or more non-horizontal segments such as zigzag segments. The non-horizontal portion of each gate line may be connected to the horizontal straight portion of the gate line by a via. The non-horizontal portions may each have portions that are overlapped by portions of the data lines. Dummy gate line structures may be provided on the display that are not coupled to any of the pixels in the display.Type: GrantFiled: May 24, 2016Date of Patent: November 17, 2020Assignee: Apple Inc.Inventors: Shinya Ono, Chun-Yao Huang, Hao-Lin Chiu, Ivan Knez, Patrick B. Bennett, Shih Chang Chang, Byung Duk Yang
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Publication number: 20200335528Abstract: 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: ApplicationFiled: June 30, 2020Publication date: October 22, 2020Inventors: Vasudha Gupta, Jae Won Choi, Shih Chang Chang, Tsung-Ting Tsai, Young Bae Park