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).
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Patent number: 11411297Abstract: 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: GrantFiled: January 28, 2022Date of Patent: August 9, 2022Assignee: Computime Ltd.Inventors: Kam Tim Cheung, Wai Yin Shum
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Publication number: 20210348960Abstract: 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: ApplicationFiled: May 5, 2020Publication date: November 11, 2021Inventor: Kam Tim Cheung
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Patent number: 9621056Abstract: 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: GrantFiled: December 18, 2015Date of Patent: April 11, 2017Assignee: Chicony Power Technology Co., Ltd.Inventors: Zhen-Yuan Wu, Tim-Cheung Leung
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Publication number: 20160216795Abstract: 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: ApplicationFiled: January 23, 2015Publication date: July 28, 2016Inventor: Kam Tim Cheung
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Publication number: 20160149498Abstract: 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: ApplicationFiled: December 18, 2015Publication date: May 26, 2016Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
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Publication number: 20160039923Abstract: 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: ApplicationFiled: October 26, 2015Publication date: February 11, 2016Inventors: Siu Tim Cheung, Sheung-Tat Fan, Phyllis Fung Yi Cheung
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Patent number: 9252672Abstract: 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: GrantFiled: October 4, 2013Date of Patent: February 2, 2016Assignee: CHICONY POWER TECHNOLOGY CO., LTD.Inventors: Zhen-Yuan Wu, Tim-Cheung Leung
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Publication number: 20150098250Abstract: 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: ApplicationFiled: October 4, 2013Publication date: April 9, 2015Applicant: Chicony Power Technology Co., Ltd.Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
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Publication number: 20140369078Abstract: 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: ApplicationFiled: June 13, 2014Publication date: December 18, 2014Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
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Publication number: 20140356321Abstract: 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: ApplicationFiled: May 30, 2014Publication date: December 4, 2014Applicant: THE UNIVERSITY OF HONG KONGInventors: Siu Tim Cheung, Sheung-Tat Fan, Phyllis Fung Yi Cheung
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Patent number: 8861237Abstract: 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: GrantFiled: January 24, 2013Date of Patent: October 14, 2014Assignee: Chicony Power Technology Co., Ltd.Inventors: Zhen-Yuan Wu, Tim-Cheung Leung
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Publication number: 20140204639Abstract: 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: ApplicationFiled: January 24, 2013Publication date: July 24, 2014Applicant: CHICONY POWER TECHNOLOGY CO., LTD.Inventors: Zhen-Yuan WU, Tim-Cheung LEUNG
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Patent number: 8076077Abstract: 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: GrantFiled: October 21, 2008Date of Patent: December 13, 2011Assignee: Versitech LimitedInventors: Siu Tim Cheung, Sheung Tat Fan
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Publication number: 20110280862Abstract: 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: ApplicationFiled: May 13, 2011Publication date: November 17, 2011Applicant: THE UNIVERSITY OF HONG KONGInventors: Siu Tim Cheung, Sheung Tat Fan
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Publication number: 20090325160Abstract: 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: ApplicationFiled: October 21, 2008Publication date: December 31, 2009Inventors: SIU TIM CHEUNG, Sheung Tat Fan
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Patent number: 7542309Abstract: 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: GrantFiled: November 21, 2006Date of Patent: June 2, 2009Assignee: Hipro Electronics Co., Ltd.Inventor: Tim Cheung Leung
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Publication number: 20080199470Abstract: 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: ApplicationFiled: November 28, 2007Publication date: August 21, 2008Inventors: Siu Tim Cheung, Chung Yee Jenny Ho, Sheung Tat Fan
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Publication number: 20080049454Abstract: 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: ApplicationFiled: November 21, 2006Publication date: February 28, 2008Inventor: Tim Cheung Leung
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Publication number: 20070081283Abstract: 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: ApplicationFiled: December 8, 2006Publication date: April 12, 2007Inventors: Tim Cheung, Douglas Fregin
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Patent number: 7030849Abstract: 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: GrantFiled: July 3, 2003Date of Patent: April 18, 2006Assignee: Freescale Semiconductor, Inc.Inventors: Ho Sang Au, Kam Tim Cheung