Patents by Inventor Li-Chung Liu
Li-Chung Liu 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: 11948702Abstract: A radiation source apparatus includes a vessel, a laser source, a collector, a horizontal obscuration bar, and a reflective mirror. The vessel has an exit aperture. The laser source is configured to emit a laser beam to excite a target material to form a plasma. The collector is disposed in the vessel and configured to collect a radiation emitted by the plasma and to reflect the collected radiation to the exit aperture of the vessel. The horizontal obscuration bar extends from a sidewall of the vessel at least to a position between the laser source and the exit aperture of the vessel. The reflective mirror is in the vessel and connected to the horizontal obscuration bar.Type: GrantFiled: May 5, 2023Date of Patent: April 2, 2024Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Wei-Chung Tu, Sheng-Kang Yu, Shang-Chieh Chien, Li-Jui Chen, Heng-Hsin Liu
-
Patent number: 11832378Abstract: In one embodiment, a carrier device for a thermal pad of an information handling system includes: a first adhesive surface coupled to the thermal pad, the thermal pad coupled to a first surface of a first component of the information handling system, the thermal pad configured to absorb a heat generated by the first component; a thermal transfer window configured to permit the heat generated by the first component to transfer from the thermal pad to a second surface of a second component of the information handling system; and a second adhesive surface removably coupled to the second surface of the second component.Type: GrantFiled: November 8, 2021Date of Patent: November 28, 2023Assignee: Dell Products L.P.Inventors: Jieh-I Taur, Bo-Wei Chu, Li-Chung Liu, Hui-Huan Chien
-
Publication number: 20230143361Abstract: In one embodiment, a carrier device for a thermal pad of an information handling system includes: a first adhesive surface coupled to the thermal pad, the thermal pad coupled to a first surface of a first component of the information handling system, the thermal pad configured to absorb a heat generated by the first component; a thermal transfer window configured to permit the heat generated by the first component to transfer from the thermal pad to a second surface of a second component of the information handling system; and a second adhesive surface removably coupled to the second surface of the second component.Type: ApplicationFiled: November 8, 2021Publication date: May 11, 2023Inventors: Jieh-I Taur, Bo-Wei Chu, Li-Chung Liu, Hui-Huan Chien
-
Patent number: 11554506Abstract: A device for measuring repeated positioning precision of a robotic arm is introduced. Using an optical speckle three-dimensional displacement sensor developed by the inventor, and with collaboration of an optical speckle image three-dimensional positioning base built with an optical speckle coordinate database and having low thermal expansion, an optical speckle three-dimensional absolute positioning space is established. The optical speckle three-dimensional displacement sensor is installed on an end effector of a robotic arm, the robotic arm is moved to have the optical speckle three-dimensional displacement sensor enter an optical speckle three-dimensional absolute positioning space, an optical speckle image of a positioning point is captured and compared with a coordinate optical speckle image in the optical speckle coordinate database, and current three-dimensional absolute positioning coordinates of the end effector of the robotic arm can be obtained.Type: GrantFiled: March 31, 2021Date of Patent: January 17, 2023Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yi-Yuh Hwang, Li-Chung Liu
-
Publication number: 20220314468Abstract: A device for measuring repeated positioning precision of a robotic arm is introduced. Using an optical speckle three-dimensional displacement sensor developed by the inventor, and with collaboration of an optical speckle image three-dimensional positioning base built with an optical speckle coordinate database and having low thermal expansion, an optical speckle three-dimensional absolute positioning space is established. The optical speckle three-dimensional displacement sensor is installed on an end effector of a robotic arm, the robotic arm is moved to have the optical speckle three-dimensional displacement sensor enter an optical speckle three-dimensional absolute positioning space, an optical speckle image of a positioning point is captured and compared with a coordinate optical speckle image in the optical speckle coordinate database, and current three-dimensional absolute positioning coordinates of the end effector of the robotic arm can be obtained.Type: ApplicationFiled: March 31, 2021Publication date: October 6, 2022Inventors: Yi-Yuh Hwang, Li-Chung Liu
-
Patent number: 11442427Abstract: The present invention provides a planar three-dimensional displacement sensor for a multiaxis machining device. With the measurement of the (planar) three-dimensional displacement sensor in the multiaxis machining device, the multiaxis machining device and a multiaxis machining compensation method are able to eliminate various deformation effects effectively.Type: GrantFiled: December 25, 2019Date of Patent: September 13, 2022Assignee: National Chung-Shan Institute of Science and TechnologyInventors: Yi-Yuh Hwang, Li-Chung Liu
-
Patent number: 11392190Abstract: A system and method for powering up a portable information handling system based on a position of a kickstand and a position of a keyboard relative to a chassis. When a kickstand is opened, a power control system determines if a keyboard is attached and opened. If the keyboard is not attached and the kickstand is opened, the power control system initiates powering up the portable information handling system. If the keyboard is attached and closed, the portable information handling system is not powered up. If the keyboard is attached and opened, the power control system initiates powering up the portable information handling system. If the kickstand is opened and the keyboard is opened, the power control system initiates powering up the portable information handling system.Type: GrantFiled: February 27, 2020Date of Patent: July 19, 2022Assignee: Dell Products L.P.Inventors: Yaotsung Chang, Chih-Lang Lin, Li Chung Liu
-
Publication number: 20220204829Abstract: The invention relates to liquid dispersion containing surface treated inorganic particle selected from the group consisting of Al2O3, AlN, Si3N4, SiC, WS2 and mixtures thereof and at least one liquid fluorinated compound, manufacturing process thereof, and use of such dispersion for increasing thermal conductivity of oil lubricants or heat transfer fluids.Type: ApplicationFiled: April 23, 2020Publication date: June 30, 2022Applicant: EVONIK OPERATIONS GMBHInventors: Li-Chung LIU, Paul BRANDL
-
Publication number: 20210271304Abstract: A system and method for powering up a portable information handling system based on a position of a kickstand and a position of a keyboard relative to a chassis. When a kickstand is opened, a power control system determines if a keyboard is attached and opened. If the keyboard is not attached and the kickstand is opened, the power control system initiates powering up the portable information handling system. If the keyboard is attached and closed, the portable information handling system is not powered up. If the keyboard is attached and opened, the power control system initiates powering up the portable information handling system. If the kickstand is opened and the keyboard is opened, the power control system initiates powering up the portable information handling system.Type: ApplicationFiled: February 27, 2020Publication date: September 2, 2021Inventors: Yaotsung Chang, Chih-Lang Lin, Li Chung Liu
-
Publication number: 20210200180Abstract: The present invention provides a planar three-dimensional displacement sensor for a multiaxis machining device. With the measurement of the (planar) three-dimensional displacement sensor in the multiaxis machining device, the multiaxis machining device and a multiaxis machining compensation method are able to eliminate various deformation effects effectively.Type: ApplicationFiled: December 25, 2019Publication date: July 1, 2021Inventors: Yi-Yuh Hwang, Li-Chung Liu
-
Patent number: 11022131Abstract: Dual operation centrifugal fan apparatus and methods of operating same that may be used, for example, to cool the internal heat-generating components of an information handling system or other device. The dual operation centrifugal fan apparatus may be implemented in one embodiment as a self-cleaning blower apparatus that is operated in a first normal cooling direction to dissipate heat from internal components of an information handling system, and operated in second cleaning direction to reverse airflow and expel accumulated dust from the interior of the information handling system.Type: GrantFiled: November 17, 2017Date of Patent: June 1, 2021Assignee: Dell Products L.P.Inventors: Gurmeet S. Bhutani, Cheng-Kuo Wang, Hung-Pin Chien, Li-Chung Liu, Tien Hsiang Wu
-
Publication number: 20200192113Abstract: The present invention is to provide a method of precisely comparing and positioning speckle patterns, which calculates light intensities of the speckle patterns, is capable of enhancing positioning accuracy of the speckle patterns, and is applicable to various navigation input devices for various types of notebook computers, multi-function keyboard and TV remote control.Type: ApplicationFiled: December 18, 2018Publication date: June 18, 2020Inventors: Yi-Yuh Hwang, Wei-Kuo Chang, Li-Chung Liu
-
Patent number: 10670877Abstract: The present invention is to provide a method of precisely comparing and positioning speckle patterns, which calculates light intensities of the speckle patterns, is capable of enhancing positioning accuracy of the speckle patterns, and is applicable to various navigation input devices for various types of notebook computers, multi-function keyboard and TV remote control.Type: GrantFiled: December 18, 2018Date of Patent: June 2, 2020Assignee: National Chung-Shan Institute of Science and TechnologyInventors: Yi-Yuh Hwang, Wei-Kuo Chang, Li-Chung Liu
-
Patent number: 10632622Abstract: An error compensation device includes at least one photographing module, a comparison module and a compensation module compensation module. The photographing module establish a space coordinate system relative to the object and comprises a first photographer and a second photographer which respectively photograph a first non-deformed laser speckle image on a first surface and a second non-deformed laser speckle image on a second surface, the first surface differs from the second surface by an azimuth. The comparison module respectively compares the first non-deformed laser speckle image before and after the displacement with the second non-deformed laser speckle image to calculate a displacement value between the two surfaces. The compensation module controls the movement of the object according to the displacement value. The error compensation utilizes the displacement of the non-deformed laser speckle image to obtain the absolute error of the object and compensate the error.Type: GrantFiled: December 27, 2017Date of Patent: April 28, 2020Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yi-Yuh Hwang, Wei-Guo Chang, Li-Chung Liu
-
Publication number: 20190193271Abstract: An error compensation device comprises at least one photographing module, a comparison module and a compensation module compensation module. The photographing module establish a space coordinate system relative to the object and comprises a first photographer and a second photographer which respectively photograph a first non-deformed laser speckle image on a first surface and a second non-deformed laser speckle image on a second surface, the first surface differs from the second surface by an azimuth. The comparison module respectively compares the first non-deformed laser speckle image before and after the displacement with the second non-deformed laser speckle image to calculate a displacement value between the two surfaces. The compensation module controls the movement of the object according to the displacement value. The error compensation utilizes the displacement of the non-deformed laser speckle image to obtain the absolute error of the object and compensate the error.Type: ApplicationFiled: December 27, 2017Publication date: June 27, 2019Inventors: YI-YUH HWANG, WEI-GUO CHANG, LI-CHUNG LIU
-
Patent number: 10189133Abstract: A measurement, calibration and compensation system for machine tool includes a first positioning base; two first speckle image sensors for sensing speckle positions of an object holding unit at a first XY plane and a first XZ plane of the first positioning base before and after the machine tool is started for machining; a second positioning base; two second speckle image sensors for sensing speckle positions of a cutter holding unit at a second XY plane and a second YZ plane of the second positioning base before and after the machine tool is started for machining. Thus, the thermal expansion at all axes of the machine tool can be measured in a simplified and low-cost way, and the absolute positioning coordinates of all axes of the machine tool can be calibrated in real time to avoid reduced positioning accuracy due to the thermal expansion of the multi-axis machine tool.Type: GrantFiled: December 22, 2016Date of Patent: January 29, 2019Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yi-Yuh Hwang, Wei-Guo Chang, Li-Chung Liu
-
Publication number: 20180178339Abstract: A measurement, calibration and compensation system for machine tool includes a first positioning base; two first speckle image sensors for sensing speckle positions of an object holding unit at a first XY plane and a first XZ plane of the first positioning base before and after the machine tool is started for machining; a second positioning base; two second speckle image sensors for sensing speckle positions of a cutter holding unit at a second XY plane and a second YZ plane of the second positioning base before and after the machine tool is started for machining. Thus, the thermal expansion at all axes of the machine tool can be measured in a simplified and low-cost way, and the absolute positioning coordinates of all axes of the machine tool can be calibrated in real time to avoid reduced positioning accuracy due to the thermal expansion of the multi-axis machine tool.Type: ApplicationFiled: December 22, 2016Publication date: June 28, 2018Inventors: YI-YUH HWANG, WEI-GUO CHANG, LI-CHUNG LIU
-
Publication number: 20180112669Abstract: Dual operation centrifugal fan apparatus and methods of operating same that may be used, for example, to cool the internal heat-generating components of an information handling system or other device. The dual operation centrifugal fan apparatus may be implemented in one embodiment as a self-cleaning blower apparatus that is operated in a first normal cooling direction to dissipate heat from internal components of an information handling system, and operated in second cleaning direction to reverse airflow and expel accumulated dust from the interior of the information handling system.Type: ApplicationFiled: November 17, 2017Publication date: April 26, 2018Inventors: Gurmeet S. Bhutani, Cheng-Kuo Wang, Hung-Pin Chien, Li-Chung Liu, Tien Hsiang Wu
-
Patent number: 9845805Abstract: Dual operation centrifugal fan apparatus and methods of operating same that may be used, for example, to cool the internal heat-generating components of an information handling system or other device. The dual operation centrifugal fan apparatus may be implemented in one embodiment as a self-cleaning blower apparatus that is operated in a first normal cooling direction to dissipate heat from internal components of an information handling system, and operated in second cleaning direction to reverse airflow and expel accumulated dust from the interior of the information handling system.Type: GrantFiled: July 29, 2010Date of Patent: December 19, 2017Assignee: Dell Products, L.P.Inventors: Gurmeet Bhutani, Cheng-Kuo Wang, Hung-Pin Chien, Li-Chung Liu, Tien Hsiang Wu
-
Patent number: 8739806Abstract: A chemical mechanical polishing (CMP) system includes a wafer polishing unit comprising a waste liquid sink for receiving a used slurry and a waste slurry drain piping for draining the used slurry; and a post-CMP cleaning unit coupled to the wafer polishing unit such that a used base chemical such as tetramethyl ammonium hydroxide (TMAH) produced from the post-CMP cleaning unit flows toward the wafer polishing unit to frequently wash at least the waste slurry drain piping in a real time fashion on a wafer by wafer basis.Type: GrantFiled: May 11, 2011Date of Patent: June 3, 2014Assignee: Nanya Technology Corp.Inventors: Li-Chung Liu, Yi-Nan Chen, Hsien-Wen Liu