Patents by Inventor Tim Cheung

Tim Cheung 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: 11411297
    Abstract: A buried wireless unit measures various soil parameters of surrounding soil and reports them to centralized equipment. In order to provide reliable communication with the centralized equipment, the buried wireless unit may extend a pop-up antenna when transmitting soil parameter data and may subsequently retract the antenna. The wireless unit unwinds and winds a wire, where an electrical cable connects the antenna to a communication module, in order to extend and retract the antenna, respectively. The wireless unit comprises a bendable sleeve enabling the antenna to be flexible so that damage to the wireless unit is avoided if a vehicle (such as a tractor) rolls over the wireless unit. In order to preserve the battery powering the wireless unit, the wireless unit may skip retracting the antenna when the wireless unit determines that charging level of the battery is below a predetermined charging level.
    Type: Grant
    Filed: January 28, 2022
    Date of Patent: August 9, 2022
    Assignee: Computime Ltd.
    Inventors: Kam Tim Cheung, Wai Yin Shum
  • Publication number: 20210348960
    Abstract: The present invention is directed to a capacitive sensor that has electrodes externally positioned on or proximate to the surface of a non-metallic container for detecting a usage level inside the container, where the contents may be liquid or granular solids. By generating an excitation signal to the electrodes and processing the resulting signal waveform, the usage level may be detected with respect to the position of the electrodes. Consequently, embodiments provide a marker that is indicative of usage conditions such as a refill condition or an empty condition in order to inform the user to purchase a refill of the contents. Embodiments may operate with an Internet of Things device so that physical goods may be automatically ordered when the contents are at or below a predetermined level. Embodiments may provide a low cost design and may be used in many applications, such as an oil diffuser.
    Type: Application
    Filed: May 5, 2020
    Publication date: November 11, 2021
    Inventor: Kam Tim Cheung
  • Patent number: 9621056
    Abstract: A method of controlling a phase-shift full-bridge (PSFB) converter in a light load operation is provided to switch control modes of the PSFB converter by detecting magnetizing current of a transformer thereof. The method includes following steps: First, the PSFB converter is operated in an extended PSFB control mode when the magnetizing current is larger. Afterward, the PSFB converter is operated in a modified PSFB control mode when the magnetizing current is gradually reduced and electric charges transported by the residual magnetizing current near to or less than a half of the DC input voltage. Finally, the optimal degree of soft switching of the PSFB converter is implemented when the PSFB converter is operated at the modified PSFB control mode. Accordingly, it is to improve overall efficiency, reduce switching losses, and achieve electromagnetic compatibility.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: April 11, 2017
    Assignee: Chicony Power Technology Co., Ltd.
    Inventors: Zhen-Yuan Wu, Tim-Cheung Leung
  • Publication number: 20160216795
    Abstract: A touch sensor panel includes a first set and a second set of sensor elements patterned in a plurality of intersecting rows and columns. The first set of sensor elements are configured to be drive electrodes. The second set of sensor elements are configured to be sense electrodes. Each row includes at least one drive electrode from the first set. Each column includes at least one sense electrode from the second set. A method for manufacturing a touch sensor panel is also provided.
    Type: Application
    Filed: January 23, 2015
    Publication date: July 28, 2016
    Inventor: Kam Tim Cheung
  • Publication number: 20160149498
    Abstract: A method of controlling a phase-shift full-bridge (PSFB) converter in a light load operation is provided to switch control modes of the PSFB converter by detecting magnetizing current of a transformer thereof. The method includes following steps: First, the PSFB converter is operated in an extended PSFB control mode when the magnetizing current is larger. Afterward, the PSFB converter is operated in a modified PSFB control mode when the magnetizing current is gradually reduced and electric charges transported by the residual magnetizing current near to or less than a half of the DC input voltage. Finally, the optimal degree of soft switching of the PSFB converter is implemented when the PSFB converter is operated at the modified PSFB control mode. Accordingly, it is to improve overall efficiency, reduce switching losses, and achieve electromagnetic compatibility.
    Type: Application
    Filed: December 18, 2015
    Publication date: May 26, 2016
    Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
  • Publication number: 20160039923
    Abstract: Granulin-epithelin precursor (GEP), a pluripotent growth factor, is a hepatic oncofetal protein defining a cancer stem cell (CSC) population in liver cancer. The present invention provides the use of GEP inhibitors (including anti-GEP antibody) for inhibiting immune evasion by liver cancer cells and for eliminating liver cancer stem cells.
    Type: Application
    Filed: October 26, 2015
    Publication date: February 11, 2016
    Inventors: Siu Tim Cheung, Sheung-Tat Fan, Phyllis Fung Yi Cheung
  • Patent number: 9252672
    Abstract: A method of controlling a phase-shift full-bridge (PSFB) converter in a light load operation is provided to switch control modes of the PSFB converter by detecting magnetizing current of a transformer thereof. The method includes following steps: First, the PSFB converter is operated in an extended PSFB control mode when the magnetizing current is larger. Afterward, the PSFB converter is operated in a modified PSFB control mode when the magnetizing current is gradually reduced and electric charges transported by the residual magnetizing current near to or less than a half of the DC input voltage. Finally, the optimal degree of soft switching of the PSFB converter is implemented when the PSFB converter is operated at the modified PSFB control mode. Accordingly, it is to improve overall efficiency, reduce switching losses, and achieve electromagnetic compatibility.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: February 2, 2016
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Zhen-Yuan Wu, Tim-Cheung Leung
  • Publication number: 20150098250
    Abstract: A method of controlling a phase-shift full-bridge (PSFB) converter in a light load operation is provided to switch control modes of the PSFB converter by detecting magnetizing current of a transformer thereof. The method includes following steps: First, the PSFB converter is operated in an extended PSFB control mode when the magnetizing current is larger. Afterward, the PSFB converter is operated in a modified PSFB control mode when the magnetizing current is gradually reduced and electric charges transported by the residual magnetizing current near to or less than a half of the DC input voltage. Finally, the optimal degree of soft switching of the PSFB converter is implemented when the PSFB converter is operated at the modified PSFB control mode. Accordingly, it is to improve overall efficiency, reduce switching losses, and achieve electromagnetic compatibility.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 9, 2015
    Applicant: Chicony Power Technology Co., Ltd.
    Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
  • Publication number: 20140369078
    Abstract: A bridge converter with a snubber circuit is applied to a power apparatus and a load apparatus. The bridge converter includes a transformer, a first diode, a secondary side first switch unit, a first capacitor, a second diode, a second capacitor, a secondary side second switch unit, a direct current to direct current conversion unit, a third capacitor and a resistor. The transformer includes a primary side winding, a first secondary side winding and a second secondary side winding.
    Type: Application
    Filed: June 13, 2014
    Publication date: December 18, 2014
    Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
  • Publication number: 20140356321
    Abstract: Granulin-epithelin precursor (GEP), a pluripotent growth factor, is a hepatic oncofetal protein defining a cancer stem cell (CSC) population in liver cancer. The present invention provides the use of GEP inhibitors (including anti-GEP antibody) for inhibiting immune evasion by liver cancer cells and for eliminating liver cancer stem cells.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 4, 2014
    Applicant: THE UNIVERSITY OF HONG KONG
    Inventors: Siu Tim Cheung, Sheung-Tat Fan, Phyllis Fung Yi Cheung
  • Patent number: 8861237
    Abstract: A power supply apparatus mainly includes a secondary side controller, a digital isolator, a plurality of isolation sensing units, and a driving unit. The secondary side controller is configured to isolatedly measure voltages and currents, and is configured to isolatedly control the driving unit. The power supply apparatus includes a controller only, i.e. the secondary side controller 114. Therefore, the power consumption is lower, and the cost is lower. Only one controller is required to update software. There is no communication delay problem between two controllers.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: October 14, 2014
    Assignee: Chicony Power Technology Co., Ltd.
    Inventors: Zhen-Yuan Wu, Tim-Cheung Leung
  • Publication number: 20140204639
    Abstract: A power supply apparatus mainly includes a secondary side controller, a digital isolator, a plurality of isolation sensing units, and a driving unit. The secondary side controller is configured to isolatedly measure voltages and currents, and is configured to isolatedly control the driving unit. The power supply apparatus includes a controller only, i.e. the secondary side controller 114. Therefore, the power consumption is lower, and the cost is lower. Only one controller is required to update software. There is no communication delay problem between two controllers.
    Type: Application
    Filed: January 24, 2013
    Publication date: July 24, 2014
    Applicant: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
  • Patent number: 8076077
    Abstract: This invention provides a composition comprising the following polynucleotide probes: IL7R (AA485865) (SEQ ID NO:7), NDRGI (AA486403) (SEQ ID NO:8), EST1 (H50345) (SEQ ID NO:9), TRPC1 (AA017132) (SEQ ID NO:10), GFRA1 (AA512935) (SEQ ID NO:11), EST2 (AA454543) (SEQ ID NO:12), CLDN10 (R54559) (SEQ ID NO:13), DNALI1 (R93087) (SEQ ID NO:14), RBP5 (AA453198) (SEQ ID NO:15), EST3 (AA621761) (SEQ ID NO:16), EST4 (N63706) (SEQ ID NO:17), PCOLCE (AA670200) (SEQ ID NO:18), TDO2 (T72398) (SEQ ID NO:19), EST5 (T47454) (SEQ ID NO:20), HIST1H2BD (N33927) (SEQ ID NO:21), PXMP2 (N70714) (SEQ ID NO:22), ACAS2 (AA455146) (SEQ ID NO:23), ANAPC7 (T68445) (SEQ ID NO:24), EST6 (AA576580) (SEQ ID NO:25), RBP5 (N92148) (SEQ ID NO:26), ANXAI (H63077) (SEQ ID NO:27), CKB (AA894557) (SEQ ID NO:28), ITGBL1 (N52533) (SEQ ID NO:29), KPNA2 (AA676460) (SEQ ID NO:30), EST7 (W90740) (SEQ ID NO:31) and MEG3 (W85841) (SEQ ID NO:32).
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: December 13, 2011
    Assignee: Versitech Limited
    Inventors: Siu Tim Cheung, Sheung Tat Fan
  • Publication number: 20110280862
    Abstract: Described herein are methods for manipulating GEP and/or drug transporters (e.g., ABCB5 and/or ABCF1) on a cell, as well as related products. Also described herein are methods for treating cancer cells using GEP and/or drug transporter and/or their binding molecules and suppression thereof. Methods of cancer treatment targeting the GEP and/or drug transporters, alone or in combination with chemotherapy are also described herein. Also provided herein are sets of markers whose expression patterns can be used to differentiate clinical conditions, such as high or low levels of GEP and drug transporters. Based on the levels of GEP and drug transporters, the likelihood of cancer recurrences, drug sensitivity, and prognosis can be determined. Methods of classifying and treating patients based on the prognosis are also provided herein.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 17, 2011
    Applicant: THE UNIVERSITY OF HONG KONG
    Inventors: Siu Tim Cheung, Sheung Tat Fan
  • Publication number: 20090325160
    Abstract: This invention provides a composition comprising the following polynucleotide probes: IL7R (AA485865) (SEQ ID NO:7), NDRGI (AA486403) (SEQ ID NO:8), EST1 (H50345) (SEQ ID NO:9), TRPC1 (AA017132) (SEQ ID NO:10), GFRA1 (AA512935) (SEQ ID NO:11), EST2 (AA454543) (SEQ ID NO:12), CLDN10 (R54559) (SEQ ID NO:13), DNALI1 (R93087) (SEQ ID NO:14), RBP5 (AA453198) (SEQ ID NO:15), EST3 (AA621761) (SEQ ID NO:16), EST4 (N63706) (SEQ ID NO:17), PCOLCE (AA670200) (SEQ ID NO:18), TDO2 (T72398) (SEQ ID NO:19), EST5 (T47454) (SEQ ID NO:20), HIST1H2BD (N33927) (SEQ ID NO:21), PXMP2 (N70714) (SEQ ID NO:22), ACAS2 (AA455146) (SEQ ID NO:23), ANAPC7 (T68445) (SEQ ID NO:24), EST6 (AA576580) (SEQ ID NO:25), RBP5 (N92148) (SEQ ID NO:26), ANXAI (H63077) (SEQ ID NO:27), CKB (AA894557) (SEQ ID NO:28), ITGBL1 (N52533) (SEQ ID NO:29), KPNA2 (AA676460) (SEQ ID NO:30), EST7 (W90740) (SEQ ID NO:31) and MEG3 (W85841) (SEQ ID NO:32).
    Type: Application
    Filed: October 21, 2008
    Publication date: December 31, 2009
    Inventors: SIU TIM CHEUNG, Sheung Tat Fan
  • Patent number: 7542309
    Abstract: A voltage stabilizer circuit of forward converter is disclosed to include a transformer, a first switch, a rectifier, an error amplifier, a control circuit, and a driving circuit. The control circuit outputs a regulation signal that controls turn-on time of the first switch, keeping the output of the load voltage at a stable level.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: June 2, 2009
    Assignee: Hipro Electronics Co., Ltd.
    Inventor: Tim Cheung Leung
  • Publication number: 20080199470
    Abstract: This invention provides methods for detecting serum GEP level. This invention further provides methods for determining whether a subject is afflicted with Hepatocellular carcinoma (HCC) by measuring serum GEP level. In another embodiment, this invention provides methods for the suppression of HCC growth and progression both in vitro and in vivo by treating a patient with anti-GEP monoclonal antibody A23.
    Type: Application
    Filed: November 28, 2007
    Publication date: August 21, 2008
    Inventors: Siu Tim Cheung, Chung Yee Jenny Ho, Sheung Tat Fan
  • Publication number: 20080049454
    Abstract: A voltage stabilizer circuit of forward converter is disclosed to include a transformer, a first switch, a rectifier, an error amplifier, a control circuit, and a driving circuit. The control circuit outputs a regulation signal that controls turn-on time of the first switch, keeping the output of the load voltage at a stable level.
    Type: Application
    Filed: November 21, 2006
    Publication date: February 28, 2008
    Inventor: Tim Cheung Leung
  • Publication number: 20070081283
    Abstract: An apparatus for providing electrostatic discharge protection includes a first conductive trace and a second conductive trace. The first conductive trace defines a first conductive periphery and is deposited on a first surface. The second conductive trace defines a second conductive periphery and is deposited on a second surface. The second surface is spaced apart from the first surface by a gap distance and in parallel relation so that a spark gap is defined by the gap distance between the first conductive periphery and the second conductive periphery.
    Type: Application
    Filed: December 8, 2006
    Publication date: April 12, 2007
    Inventors: Tim Cheung, Douglas Fregin
  • Patent number: 7030849
    Abstract: An LCD controller (10) has a DMA unit (18) and a FIFO memory (20) for storing display data. The LCD controller also has a display data generator (26) that generates display information using a line of the display data stored in the FIFO memory in accordance with a predefined algorithm. A holding register (28) is connected to the display data generator and stores the generated display information. A multiplexer (34) selects for display either the data stored in the FIFO memory or the generated display information. The generated display information is selected when there is a bus overload indicating that the data stored in the FIFO may be erroneous.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: April 18, 2006
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Ho Sang Au, Kam Tim Cheung