Patents by Inventor Lin Cheng

Lin Cheng 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).

  • Publication number: 20240084163
    Abstract: Durable, anti-fouling, crosslinked zwitterionic coatings that are grafted to the surface of a substrate through covalent bonding are disclosed. When exposed to a light source, zwitterionic monomers react with a crosslinker and with activated radicals at the surface of the substrate, simultaneously forming the crosslinked zwitterionic coating and anchoring it to the surface of the substrate. Photomasking techniques can be used to micropattern the zwitterionic coatings. The zwitterionic coatings can be applied to a variety of substrates, including medical devices and systems.
    Type: Application
    Filed: November 13, 2023
    Publication date: March 14, 2024
    Inventors: Elise Lin Cheng, C. Allan Guymon, Marlan R. Hansen, Braden Leigh
  • Publication number: 20240085571
    Abstract: A communication system, includes a satellite receiver in operable communication with a central server, a cellular node configured to operate within a proximity of the satellite receiver, and at least one mobile communication device configured to communicate (i) with the cellular node, (ii) within the proximity of the satellite receiver, and (iii) using a transmission signal capable of causing interference to the satellite receiver. The satellite receiver is configured to detect a repeating portion of the transmission signal and determine a potential for interference from the at least one mobile communication device based on the detected repeating portion.
    Type: Application
    Filed: June 26, 2023
    Publication date: March 14, 2024
    Inventors: Belal Hamzeh, Peter Paul Smyth, Lin Cheng, Jim O'Connor, Eric Winkelman, Thomas H. Williams, Steve Arendt
  • Publication number: 20240072790
    Abstract: The invention uses the control circuit formed on the silicon wafer to detect the leakage current of transistor formed on the depletion mode GaN wafer and then adjust the gate voltage of the depletion mode GaN transistor according to the detected leakage current. Essentially, the gate voltage is reduced or viewed as made more negative when the detected leakage current is larger a specific value. Thus, the gate voltage can be gradually adjusted to approach a specific threshold voltage that right block the leakage current. In other words, by making the gate voltage more negative when non-zero leakage current is detected and even by making the gate voltage more positive when zero leakage current is detected, the depletion mode GaN transistor can be adjusted to have an acceptable or even zero leakage current, a high reaction rate and an optimized efficiency.
    Type: Application
    Filed: August 23, 2022
    Publication date: February 29, 2024
    Inventors: KE-HORNG CHEN, TZU-HSIEN YANG, YONG-HWA WEN, KUO-LIN CHENG
  • Patent number: 11916747
    Abstract: A method for automatic discovery of a communication network including a hub, a plurality of termination devices, and a plurality of network elements. The method includes (a) associating respective geographic information with each termination device, (b) determining a respective distance of each termination device from the hub, (c) grouping, at least partially based on diagnostic information from the communication network, two or more of the plurality of termination devices sharing a common characteristic, (d) determining a topology of the communication network, and (e) determining a respective characteristic of at least one network element of the plurality of network elements.
    Type: Grant
    Filed: August 26, 2022
    Date of Patent: February 27, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Christopher J. Corcimiglia, Thomas Holtzman Williams, Lin Cheng, Sayandev Mukherjee, Belal Hamzeh
  • Publication number: 20240014126
    Abstract: An isolated power chip based on wafer level packaging, including: an RDL-based micro-transformer, where a primary coil of the RDL-based micro-transformer is connected to a direct-current power supply and configured to output a direct-current voltage input by the direct-current power supply; a transmitting chip connected to the primary coil of the RDL-based micro-transformer, and configured to receive the direct-current voltage, convert the direct-current voltage into an alternating current signal, and transmit the alternating current signal to a secondary coil of the RDL-based micro-transformer; and a receiving chip connected to the secondary coil of the RDL-based micro-transformer, and configured to convert the alternating current signal into a direct-current signal, generate a control signal for stabilizing the output voltage according to a change of a load, and encode the control signal for digital isolation.
    Type: Application
    Filed: December 18, 2020
    Publication date: January 11, 2024
    Inventors: Lin CHENG, Dongfang Pan
  • Patent number: 11863366
    Abstract: A method of modulating a series of input digital symbols of a first modulation scheme is provided. The method is implemented by a transmitter and includes receiving a sequential series of samples of the digital symbols in a first domain of the first modulation scheme. The first domain is one of the time domain and the frequency domain. The method further includes determining a dual of the first modulation scheme. The dual has a second modulation scheme in a second domain that is different from the first domain the second domain is the other of the time domain and the frequency domain. The method further includes applying a 90 degree rotational operation to the second modulation scheme to generate a rotational modulation format, modulating the series of digital symbols with the generated rotational modulation format, and outputting the modulated series of digital symbols to a receiver.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: January 2, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Lin Cheng
  • Patent number: 11848809
    Abstract: A profile optimizing method is provided for a transmission of active subcarriers over a channel to user devices. The method includes steps of (i) obtaining a symbol mapping architecture for the set of profiles, (ii) calculating, from the symbol mapping architecture, a plurality of mapping orders for the set of profiles different from the logical order, (iii) determining, from the calculated plurality of mapping orders, a particular mapping order having a higher spectral efficiency than the logical order, (iv) reordering the respective codewords of the set of profiles to correspond to the particular mapping order, (v) re-mapping the symbol mapping architecture to a number of symbols corresponding to the reordered codewords, and (vi) transmitting the symbols to the population of user devices. The symbol mapping architecture includes a codeword for each profile of the set of profiles, and maps the codewords to a different number by logical order.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: December 19, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Lin Cheng, Jingjie Zhu
  • Publication number: 20230395618
    Abstract: A method for fabricating an image sensor array having a first group of photodiodes for detecting light at visible wavelengths a second group of photodiodes for detecting light at infrared or near-infrared wavelengths, the method including growing a germanium-silicon layer on a semiconductor donor wafer; defining pixels of the image sensor array on the germanium-silicon layer; defining a first interconnect layer on the germanium-silicon layer, wherein the interconnect layer includes a plurality of interconnects coupled to the first group of photodiodes and the second group of photodiodes; defining integrated circuitry for controlling the pixels of the image sensor array on a semiconductor carrier wafer; defining a second interconnect layer on the semiconductor carrier wafer, wherein the second interconnect layer includes a plurality of interconnects coupled to the integrated circuitry; and bonding the first interconnect layer with the second interconnect layer.
    Type: Application
    Filed: August 22, 2023
    Publication date: December 7, 2023
    Inventors: Yun-Chung Na, Szu-Lin Cheng, Shu-Lu Chen, Han-Din Liu, Hui-Wen Chen, Che-Fu Liang
  • Publication number: 20230369376
    Abstract: A circuit that includes: a photodiode configured to absorb photons and to generate photo-carriers from the absorbed photons; a first MOSFET transistor that includes: a first channel terminal coupled to a first terminal of the photodiode and configured to collect a portion of the photo-carriers generated by the photodiode; a second channel terminal; and a gate terminal coupled to a first control voltage source; a first readout circuit configured to output a first readout voltage; a second readout circuit configured to output a second readout voltage; and a current-steering circuit configured to steer the photo-carriers generated by the photodiode to one or both of the first readout circuit and the second readout circuit.
    Type: Application
    Filed: July 19, 2023
    Publication date: November 16, 2023
    Inventors: Yun-Chung Na, Szu-Lin Cheng, Shu-Lu Chen, Han-Din Liu, Hui-Wen Chen, Che-Fu Liang, Yuan-Fu Lyu, Chien-Lung Chen, Chung-Chih Lin, Kuan-Chen Chu
  • Patent number: 11814526
    Abstract: Durable, anti-fouling, crosslinked zwitterionic coatings that are grafted to the surface of a substrate through covalent bonding are disclosed. When exposed to a light source, zwitterionic monomers react with a crosslinker and with activated radicals at the surface of the substrate, simultaneously forming the crosslinked zwitterionic coating and anchoring it to the surface of the substrate. Photomasking techniques can be used to micropattern the zwitterionic coatings. The zwitterionic coatings can be applied to a variety of substrates, including medical devices and systems.
    Type: Grant
    Filed: December 12, 2022
    Date of Patent: November 14, 2023
    Assignee: University of Iowa Research Foundation
    Inventors: Elise Lin Cheng, C. Allan Guymon, Marian R. Hansen, Braden Leigh
  • Patent number: 11804195
    Abstract: The disclosure provides a display equipment, a brightness compensation device, and a brightness compensation method. The brightness compensation device includes a variable refresh rate (VRR) detection circuit and a control circuit. The VRR detection circuit and the control circuit receive a video stream from a video source device, and the video stream includes a VRR video frame. The VRR detection circuit detects a blanking period of the VRR video frame and generates a detection result. The control circuit outputs the frame data of the VRR video frame to the display device during the valid data period of the VRR video frame. The control circuit repeatedly outputs the frame data of the VRR video frame to the display device during the blanking period of the VRR video frame according to the detection result until the blanking period ends.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: October 31, 2023
    Assignee: Novatek Microelectronics Corp.
    Inventors: Po-Hsiang Huang, Chia-Hsing Hou, Yu-Lin Cheng, Chung-Wen Wu
  • Patent number: 11799378
    Abstract: Multiphase series capacitor DC-DC converters are provided, including: a power stage circuit configured to convert an input DC voltage into a stable DC voltage required by a load, where the power stage circuit includes inductors of two or more phases, and there is a phase difference with a preset interval between inductor currents of phases for alternately charging the load in sequence, and a bidirectional switch is provided between inductors of every two adjacent phases, where when the bidirectional switch is turned on, the inductors of the corresponding two phases charge the load simultaneously; and a load transient response circuit configured to, when a load transient positive step occurs, control one or more bidirectional switches to be turned on to make inductors of two or more corresponding phases charge the load simultaneously. Control methods of such converters are also provided, which can realize fast response to load transient changes.
    Type: Grant
    Filed: June 5, 2023
    Date of Patent: October 24, 2023
    Assignee: HEFEI CLT MICROELECTRONICS CO. LTD
    Inventors: Lin Cheng, Feng Wu, Jingyi Yuan, Zeguo Liu
  • Patent number: 11784719
    Abstract: A method for tuning a power characteristic of an optical frequency comb includes controlling a modulating light source according to a plurality of modulation parameters to generate an optical frequency comb including a plurality of optical tones. Additionally, at least one of the plurality of modulation parameters is changed until a total power of the plurality of optical tones is greater than or equal to a minimum threshold value. Furthermore, at least one of the plurality of modulation parameters are changed until respective powers of each of the plurality of optical tones are within a predetermined proximity to respective target powers of each of the plurality of optical tones.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: October 10, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Lin Cheng, Luis Alberto Campos, Haipeng Zhang, Junwen Zhang, Mu Xu, Zhensheng Jia
  • Publication number: 20230318460
    Abstract: Multiphase series capacitor DC-DC converters are provided, including: a power stage circuit configured to convert an input DC voltage into a stable DC voltage required by a load, where the power stage circuit includes inductors of two or more phases, and there is a phase difference with a preset interval between inductor currents of phases for alternately charging the load in sequence, and a bidirectional switch is provided between inductors of every two adjacent phases, where when the bidirectional switch is turned on, the inductors of the corresponding two phases charge the load simultaneously; and a load transient response circuit configured to, when a load transient positive step occurs, control one or more bidirectional switches to be turned on to make inductors of two or more corresponding phases charge the load simultaneously. Control methods of such converters are also provided, which can realize fast response to load transient changes.
    Type: Application
    Filed: June 5, 2023
    Publication date: October 5, 2023
    Inventors: Lin CHENG, Feng WU, Jingyi YUAN, Zeguo LIU
  • Publication number: 20230298913
    Abstract: A bonding apparatus for attaching an adhering pad to a base component includes a feeding and holding frame for feeding and holding the base component in a conveying route, a suspending carrier mounted above the conveying route, and a bonding device disposed on and movable with the suspending carrier. The bonding device has a feeding reel on which the tape assembly is disposed and from which the tape assembly is pulled and fed along a feeding route, and an attaching head which is disposed at said feeding route to divide the pulled section into an input side and an output side. When the attaching head is moved toward the input side, the adhering pad is removed from the carrier tape while attached to the base component.
    Type: Application
    Filed: January 9, 2023
    Publication date: September 21, 2023
    Inventors: Chun-Hung Tsai, An-Tien Wang, Kuan-Lin Cheng, Shih-Min Lee
  • Patent number: 11756969
    Abstract: A method for fabricating an image sensor array having a first group of photodiodes for detecting light at visible wavelengths a second group of photodiodes for detecting light at infrared or near-infrared wavelengths, the method including growing a germanium-silicon layer on a semiconductor donor wafer; defining pixels of the image sensor array on the germanium-silicon layer; defining a first interconnect layer on the germanium-silicon layer, wherein the interconnect layer includes a plurality of interconnects coupled to the first group of photodiodes and the second group of photodiodes; defining integrated circuitry for controlling the pixels of the image sensor array on a semiconductor carrier wafer; defining a second interconnect layer on the semiconductor carrier wafer, wherein the second interconnect layer includes a plurality of interconnects coupled to the integrated circuitry; and bonding the first interconnect layer with the second interconnect layer.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: September 12, 2023
    Assignee: Artilux, Inc.
    Inventors: Yun-Chung Na, Szu-Lin Cheng, Shu-Lu Chen, Han-Din Liu, Hui-Wen Chen, Che-Fu Liang
  • Publication number: 20230280206
    Abstract: A photodetecting device is provided. The photodetecting device includes a silicon substrate, a germanium absorption region, and a plurality of microstructures. The silicon substrate includes a first surface and a second surface. The germanium absorption region is formed proximal to the first surface of the silicon substrate, and the germanium absorption region is configured to absorb photons and to generate photo-carriers. The plurality of microstructures are formed over the second surface of the silicon substrate, and the plurality of microstructures are configured to direct an optical signal towards the germanium absorption region. A system including an optical transmitter and an optical receiver is also provided.
    Type: Application
    Filed: May 11, 2023
    Publication date: September 7, 2023
    Inventors: YEN-CHENG LU, YUN-CHUNG NA, SHU-LU CHEN, CHIEN-YU CHEN, SZU-LIN CHENG, CHUNG-CHIH LIN, YU-HSUAN LIU
  • Patent number: 11749696
    Abstract: An optical apparatus includes: a substrate having a first material; an absorption region having a second material different from the first material, the absorption region configured to absorb photons and to generate photo-carriers including electrons and holes in response to the absorbed photons; a first well region surrounding the absorption region and arranged between the absorption region and the substrate, the first well region being doped with a first polarity; and one or more switches each controlled by a respective control signal, the one or more switches each configured to collect at least a portion of the photo-carriers based on the respective control signal and to provide the portion of the photo-carriers to a respective readout circuit.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: September 5, 2023
    Assignee: Artilux, Inc.
    Inventors: Yun-Chung Na, Che-Fu Liang, Szu-Lin Cheng, Shu-Lu Chen, Kuan-Chen Chu, Chung-Chih Lin, Han-Din Liu
  • Patent number: 11728890
    Abstract: A resource allocation method is provided for a non-orthogonal multiple access distribution of access network users communicatively coupled to a single transport medium. The method includes steps of allocating a first frequency and time domain resource to a first user and a second frequency and time domain resource to a second user of the access network users, obtaining channel information regarding a particular communication channel of the access network for which resources are allocated, grouping the first user with the second user based on an overlap of the first frequency and time domain resource with the second frequency and time domain resource, and assigning the first user to a different power allocation resource than the second user within the frequency and time domain overlap.
    Type: Grant
    Filed: July 12, 2022
    Date of Patent: August 15, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Lin Cheng, Luis Alberto Campos, Jing Wang, Zhensheng Jia
  • Patent number: 11722340
    Abstract: A method for comparing communication links in a communication network includes (a) obtaining first raw equalizer coefficients in a frequency domain, the first raw equalizer coefficients corresponding to a first communication link, (b) obtaining second raw equalizer coefficients in the frequency domain, the second raw equalizer coefficients corresponding to a second communication link, (c) removing time delay from the first raw equalizer coefficients to generate first corrected equalizer coefficients, (d) removing time delay from the second raw equalizer coefficients to generate second corrected equalizer coefficients, and (e) comparing the first corrected equalizer coefficients to the second corrected equalizer coefficients to determine a relationship between the first and second communication links.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: August 8, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Luis Alberto Campos, Lin Cheng