Patents by Inventor Cheng-An Liao

Cheng-An Liao 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: 9793815
    Abstract: In accordance with embodiments of the present disclosure, a switch mode power supply may include a transformer, a controller configured to generate a periodic switching signal, a switching transistor coupled between a sense node and the transformer, primarily configured to prevent or permit current flow in the transformer primary winding in accordance with the switching signal, a sense resistor coupled to the switching transistor at a sense node, and a limit circuit configured to obtain a voltage of the sense node at a particular point of the switching period as an indicator of the primary winding current, detect a duration of a demagnetizing interval, and generate a limit signal, based on the sense node voltage and the demagnetizing interval, indicating a power supply output current exceeding a limit threshold.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: October 17, 2017
    Assignee: Dell Products L.P.
    Inventors: Wei Cheng Yu, Tsung-Cheng Liao, Merle Jackson Wood, III, Yan Yang, Keith J. Kasprzak
  • Publication number: 20170293347
    Abstract: A system and method for performing an intelligent power dongle operation for information handling systems having a serial bus power connection such as a USB type-C power connection. In certain embodiments, the intelligent power dongle includes hardware and firmware to read a legacy adapter PSID information and convert the information to serial information such as USB Type-C baseboard management controller BMC compliant data. In certain embodiments the intelligent power dongle includes power management circuitry the allow selection and proper switching between a low voltage power mode (e.g., a 5V power mode) and a higher voltage power mode (e.g., a 19.5V power mode) depending on a device attached to the intelligent power dongle. In certain embodiments, the intelligent power dongle may be used to power low voltage devices (e.g., devices powered by 5V).
    Type: Application
    Filed: April 7, 2016
    Publication date: October 12, 2017
    Applicant: Dell Products L.P.
    Inventors: Merle J. Wood, III, Wei-Cheng Yu, Sean P. O'Neal, Thomas E. Voor, Tsung-Cheng Liao, Tun-Chieh Liang
  • Publication number: 20170293107
    Abstract: An optical lens including a first lens group and a second lens group is provided. The first lens group is arranged between a magnified side and a minified side. The first lens group includes a lens closest to the magnified side. A refractive power of the lens is negative, and at least one surface of the lens is an aspherical surface. The second lens group is arranged between the first lens group and the minified side. A distance between the first lens group and the second lens group is smaller than 0.7 millimeter. The optical lens is complied with conditions of 0.53<EFL/IH<0.7, FOV?150 degrees, and F?2.8, where EFL is an effective focal length, IH is an image height on an imaging plane at the minified side, FOV is a maximum field of view, and F is f-number.
    Type: Application
    Filed: April 8, 2016
    Publication date: October 12, 2017
    Inventors: Kuo-Chuan Wang, Chen-Cheng Liao
  • Publication number: 20170289043
    Abstract: A method is disclosed for performing traffic engineering for a flow traversing a communications network having a plurality of nodes communicatively coupled by a plurality of links, with at least one of the plurality of links being a wireless link. The method includes setting an activation factor for the at least one wireless link in accordance with buffer statuses associated with nodes traversed by the flow; and transmitting the activation factor to a scheduling entity for scheduling activation of the at least one wireless link in accordance with the activation factor.
    Type: Application
    Filed: April 26, 2016
    Publication date: October 5, 2017
    Inventors: Nan Zhang, Wei-Cheng Liao, Mingyi Hong, Hamidreza Farmanbar, Zhi-Quan Luo
  • Patent number: 9753253
    Abstract: An optical lens system includes a first lens element of negative refractive power having a meniscus shape, a second lens element of positive refractive power having a convex image-side surface and disposed adjacent to the first lens element, a third lens element of positive refractive power having at least one aspheric surface and disposed adjacent to the second lens element, and a fourth lens element of negative refractive power having at least one aspheric surface and disposed adjacent to the third lens element.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: September 5, 2017
    Assignee: YOUNG OPTICS INC.
    Inventor: Chen-Cheng Liao
  • Publication number: 20170228267
    Abstract: Disclosed herein is a shared memory systems that use a combination of SBR and MRRR techniques to calculate eigenpairs for dense matrices having very large numbers of rows and columns. The disclosed system allows for the use of a highly scalable tridiagonal eigensolver. The disclosed system likewise allows for allocating a different number of threads to each of the different computational stages of the eigensolver.
    Type: Application
    Filed: January 17, 2017
    Publication date: August 10, 2017
    Inventor: Cheng Liao
  • Publication number: 20170222457
    Abstract: An information handling system receives power from a reversible power cable by selectively configuring outer pins to provide power or communication with a middle pin providing ground. A power manager of an information handling system embedded controller uses a low level of power input to determine which outer pin provides power and which provides communication, and then configures the connector to route power at a high level to the system charger for powering the information handling system.
    Type: Application
    Filed: January 28, 2016
    Publication date: August 3, 2017
    Applicant: Dell Products L.P.
    Inventors: Mohammed K. Hijazi, Merle J. Wood, III, Geroncio O. Tan, Karunakar P. Reddy, Christopher A. Torres, Kendall C. Witte, Wei-Cheng Yu, Tsung-Cheng Liao, Marcin M. Nowak
  • Patent number: 9710892
    Abstract: An image enhancement method and an image processing apparatus thereof are provided. The image enhancement method is adapted to the image processing apparatus and includes the following steps. An input image is obtained, wherein the input image has a plurality of intensity components. The input image is corrected according to a gamma curve. The sharpness of the corrected input image is enhanced based on an edge detection operator and a weight value. An output image suitable for a display panel is obtained based on the enhanced input image.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: July 18, 2017
    Assignee: Chunghwa Picture Tubes, LTD.
    Inventors: Chia-Cheng Liao, Chun-Wei Su
  • Publication number: 20170179831
    Abstract: A zero voltage switching method for a flyback converter featuring a transformer with first and second primary windings and corresponding turns ratios, N1 and N2, includes rectifying and filtering an AC signal to produce a primary DC voltage. A voltage level signal indicating whether the primary DC voltage falls within a particular voltage range is generated. The voltage level signal is used to select a particular primary winding from either the first primary winding or the second primary winding. A PWM controller corresponding to the particular primary winding is activated and an output of the particular PWM controller performs zero voltage switching of a gate terminal of the applicable main switching transistor. A duty cycle of the main switching transistor is maintained within a range of approximately 50% to approximately 60% in accordance with the turns ratio and the primary DC voltage to achieve a desired output voltage.
    Type: Application
    Filed: December 17, 2015
    Publication date: June 22, 2017
    Applicant: Dell Products L.P.
    Inventors: Wei Cheng Yu, Tsung-Cheng Liao, Wen-Yung Chang, Merle Jackson Wood, III, Tun-Chieh Liang
  • Publication number: 20170153415
    Abstract: An optical lens including a first lens group located between a magnified side and a minified side and a second lens group between the first lens group and the minified side is provided. The first lens group has a negative power and includes a first lens. The first lens is a plastic aspheric and meniscus lens. Besides, the first lens has a negative power and a convex surface facing the magnified side. The second lens group has a positive power and includes a second lens, a third lens having a negative power, and a fourth lens. Every two of the second, third, and fourth lenses have an air interval between these lenses. The Abbe number of each of at least three of the lenses is greater than 20. A material of at least one of the lenses is glass. At least one of the lenses is a spherical lens.
    Type: Application
    Filed: June 1, 2016
    Publication date: June 1, 2017
    Inventors: Ching-Lung Lai, Chen-Cheng Liao
  • Publication number: 20170116712
    Abstract: An image enhancement method and an image processing apparatus thereof are provided. The image enhancement method is adapted to the image processing apparatus and includes the following steps. An input image is obtained, wherein the input image has a plurality of intensity components. The input image is corrected according to a gamma curve. The sharpness of the corrected input image is enhanced based on an edge detection operator and a weight value.
    Type: Application
    Filed: October 21, 2015
    Publication date: April 27, 2017
    Inventors: Chia-Cheng Liao, Chun-Wei Su
  • Patent number: 9607946
    Abstract: The present disclosure relates to a method of forming a back-end-of-the-line metallization layer. The method is performed by forming a plurality of freestanding metal layer structures (i.e., metal layer structures not surrounded by a dielectric material) on a semiconductor substrate within an area defined by a patterned photoresist layer. A diffusion barrier layer is deposited onto the metal layer structure in a manner such that the diffusion barrier layer conforms to the top and sides of the metal layer structure. A dielectric material is formed on the surface of the substrate to fill areas between metal layer structures. The substrate is planarized to remove excess metal and dielectric material and to expose the top of the metal layer structure.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: March 28, 2017
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: You-Hua Chou, Min Hao Hong, Jian-Shin Tsai, Miao-Cheng Liao, Hsiang Hsiang Ko
  • Publication number: 20170084604
    Abstract: A layout structure is provided. The layout structure includes a substrate, a gate conductive layer, a first doped region having a first conductivity, a second doped region having the first conductivity, and a third doped region having a second conductivity. The gate conductive layer is formed on the substrate. The first doped region the second doped region are formed in the substrate and located at two sides of the gate conductive layer. The third doped region is formed in the substrate and adjacent to the second doped region. The third doped region and the second doped region form a diode. The gate conductive layer, the first doped region, and the third doped region are connected to ground, and the second doped region is connected to an input/output pad.
    Type: Application
    Filed: September 22, 2015
    Publication date: March 23, 2017
    Inventors: Pei-Shan Tseng, Yu-Cheng Liao, Ping-Chen Chang, Tien-Hao Tang, Kuan-Cheng Su
  • Patent number: 9596203
    Abstract: Collecting online group chat messages. The method may include receiving a message associated with an online group chat session between chat participants. The method may also include determining the received message satisfies at least one message collection rule. The method may further include recording the received message to at least one message table based on each chat participant mentioned in the received message. The method may also include determining a first chat participant chooses to open a private chat session with at least one second chat participant. The method may further include identifying recorded messages within the message tables associated with the at least one second chat participant. The method may also include displaying the identified recorded messages in a private chat session sub-window.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: March 14, 2017
    Assignee: International Business Machines Corporation
    Inventors: Yan Lan, Qian Cheng Liao, Li Wang, Xiao Li Wang, Jun Qing Zhang
  • Publication number: 20170025958
    Abstract: In accordance with embodiments of the present disclosure, a switch mode power supply may include a transformer, a controller configured to generate a periodic switching signal, a switching transistor coupled between a sense node and the transformer, primarily configured to prevent or permit current flow in the transformer primary winding in accordance with the switching signal, a sense resistor coupled to the switching transistor at a sense node, and a limit circuit configured to obtain a voltage of the sense node at a particular point of the switching period as an indicator of the primary winding current, detect a duration of a demagnetizing interval, and generate a limit signal, based on the sense node voltage and the demagnetizing interval, indicating a power supply output current exceeding a limit threshold.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Inventors: Wei Cheng Yu, Tsung-Cheng Liao, Merle Jackson Wood, III, Yan Yang, Keith J. Kasprzak
  • Patent number: 9547882
    Abstract: Disclosed herein is a shared memory systems that use a combination of SBR and MRRR techniques to calculate eigenpairs for dense matrices having very large numbers of rows and columns. The disclosed system allows for the use of a highly scalable tridiagonal eigensolver. The disclosed system likewise allows for allocating a different number of threads to each of the different computational stages of the eigensolver.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: January 17, 2017
    Assignee: SILICON GRAPHICS INTERNATIONAL CORP.
    Inventor: Cheng Liao
  • Publication number: 20170012915
    Abstract: Collecting online group chat messages. The method may include receiving a message associated with an online group chat session between chat participants. The method may also include determining the received message satisfies at least one message collection rule. The method may further include recording the received message to at least one message table based on each chat participant mentioned in the received message. The method may also include determining a first chat participant chooses to open a private chat session with at least one second chat participant. The method may further include identifying recorded messages within the message tables associated with the at least one second chat participant. The method may also include displaying the identified recorded messages in a private chat session sub-window.
    Type: Application
    Filed: September 26, 2016
    Publication date: January 12, 2017
    Inventors: Yan Lan, Qian Cheng Liao, Li Wang, Xiao Li Wang, Jun Qing Zhang
  • Patent number: 9536834
    Abstract: The present disclosure relates to a method of forming a back-end-of-the-line metallization layer. The method is performed by forming a plurality of freestanding metal layer structures (i.e., metal layer structures not surrounded by a dielectric material) on a semiconductor substrate within an area defined by a patterned photoresist layer. A diffusion barrier layer is deposited onto the metal layer structure in a manner such that the diffusion barrier layer conforms to the top and sides of the metal layer structure. A dielectric material is formed on the surface of the substrate to fill areas between metal layer structures. The substrate is planarized to remove excess metal and dielectric material and to expose the top of the metal layer structure.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: January 3, 2017
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: You-Hua Chou, Min Hao Hong, Jian-Shin Tsai, Miao-Cheng Liao, Hsiang Hsiang Ko
  • Publication number: 20160380940
    Abstract: Collecting online group chat messages. The method may include receiving a message associated with an online group chat session between chat participants. The method may also include determining the received message satisfies at least one message collection rule. The method may further include recording the received message to at least one message table based on each chat participant mentioned in the received message. The method may also include determining a first chat participant chooses to open a private chat session with at least one second chat participant. The method may further include identifying recorded messages within the message tables associated with the at least one second chat participant. The method may also include displaying the identified recorded messages in a private chat session sub-window.
    Type: Application
    Filed: June 24, 2015
    Publication date: December 29, 2016
    Inventors: Yan Lan, Qian Cheng Liao, Li Wang, Xiao Li Wang, Jun Qing Zhang
  • Publication number: 20160380944
    Abstract: Collecting online group chat messages. The method may include receiving a message associated with an online group chat session between chat participants. The method may also include determining the received message satisfies at least one message collection rule. The method may further include recording the received message to at least one message table based on each chat participant mentioned in the received message. The method may also include determining a first chat participant chooses to open a private chat session with at least one second chat participant. The method may further include identifying recorded messages within the message tables associated with the at least one second chat participant. The method may also include displaying the identified recorded messages in a private chat session sub-window.
    Type: Application
    Filed: August 17, 2016
    Publication date: December 29, 2016
    Inventors: Yan Lan, Qian Cheng Liao, Li Wang, Xiao Li Wang, Jun Qing Zhang