Patents by Inventor Cheng-Han Lee

Cheng-Han Lee 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).

  • Method and device for analyzing two-dimension sensing information
    Patent number: 9069410
    Abstract: A two-dimension (2D) sensing information is analyzed for determining touch related sensing information. The touch related sensing information may include touch related sensing information with inner low values within outer high values and with inner higher values within outer low values.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: June 30, 2015
    Assignee: EGALAX—EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Accessory detection circuit with improved functionality
    Patent number: 9060228
    Abstract: An apparatus comprises a first connector, a second connector, a detection circuit and a logic circuit. The first connector and the second connector are configured for electrical communication with first and second conducting terminals, respectively, of an audio jack plug. The detection circuit is configured to apply a first value of current to the first connector, and apply a second value of current to the second connector. The logic circuit is configured to generate an indication that the audio jack plug is fully inserted according to a logic level detected at the second connector when electrical ground is detected at the first connector.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: June 16, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Tony Cheng Han Lee, Shawn Kirk Barden, Seth M. Prentice
  • CONTROL UNIT, SENSING DEVICE FOR A CAPACITIVE TOUCH PANEL AND METHOD THEREOF
    Publication number: 20150138152
    Abstract: A noise reducing device for a capacitive touch panel and a method of reducing noise for a capacitive touch panel are disclosed to solve problems related to noise generated by a conventional filter circuit and an integrating circuit or external noise. In the invention, at least one switch circuit is used so that the conventional filter circuit and integrating circuit used in the prior are omitted.
    Type: Application
    Filed: January 26, 2015
    Publication date: May 21, 2015
    Inventors: CHIN-FU CHANG, CHENG-HAN LEE
  • METHOD AND DEVICE FOR POSITION DETECTION
    Publication number: 20150138154
    Abstract: A method and device for position detection are disclosed. A self-capacitance detection can be performed by a sensing device. According to the result of the self-capacitance detection, a first mutual-capacitance detection can be performed for determining one or more first 1-D positions. According to the result of the first mutual-capacitance detection, a second mutual-capacitance detection can be performed for determining one or more second 1-D positions corresponding to each first 1-D position.
    Type: Application
    Filed: January 28, 2015
    Publication date: May 21, 2015
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Control unit, sensing device for a capacitive touch panel and method therefor
    Patent number: 8976122
    Abstract: A noise reducing device for a capacitive touch panel and a method of reducing noise for a capacitive touch panel are disclosed to solve problems related to noise generated by a conventional filter circuit and an integrating circuit or external noise. In the invention, at least one switch circuit is used so that the conventional filter circuit and integrating circuit used in the prior are omitted. Signals output from a current measurement circuit are transmitting to a control unit to calculate the location of a touch point, reducing any noise.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: March 10, 2015
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee
  • Method and device for position detection
    Patent number: 8970552
    Abstract: A method and device for position detection are disclosed. A self-capacitance detection can be performed by a sensing device. According to the result of the self-capacitance detection, a first mutual-capacitance detection can be performed for determining one or more first 1-D positions. According to the result of the first mutual-capacitance detection, a second mutual-capacitance detection can be performed for determining one or more second 1-D positions corresponding to each first 1-D position. One or more 2-D positions can be provided according to the one or more second 1-D positions corresponding to each first 1-D position. Besides, during the self-capacitance detection, the first mutual-capacitance detection, and the second mutual-capacitance detection, a touch related sensing information corresponding to a touch that covers a wide area can be neglected for palm rejection.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: March 3, 2015
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Method and device for position detection
    Patent number: 8970551
    Abstract: A method and device for position detection are disclosed. A self-capacitance detection can be performed by a sensing device. According to the result of the self-capacitance detection, a first mutual-capacitance detection can be performed for determining one or more first 1-D positions. According to the result of the first mutual-capacitance detection, a second mutual-capacitance detection can be performed for determining one or more second 1-D positions corresponding to each first 1-D position. One or more 2-D positions can be provided according to the one or more second 1-D positions corresponding to each first 1-D position. Besides, during the self-capacitance detection, the first mutual-capacitance detection, and the second mutual-capacitance detection, a touch related sensing information corresponding to a touch that covers a wide area can be neglected for palm rejection.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: March 3, 2015
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Signal transmission device performing compensation by filtering characteristics and method thereof, and signal reception device offsetting compensation and method thereof
    Patent number: 8964917
    Abstract: The present invention discloses a signal transmission device performing compensation by filtering characteristics for generating a transmission signal according to a pulse amplitude modulation signal. The signal transmission device comprises: a filtering characteristic compensation circuit for generating a compensation signal according to the pulse amplitude modulation signal and a filtering function; a filter coupled to the filtering characteristic compensation circuit for generating a filtered signal through filtering the compensation signal according to the aforementioned filtering function; and an analog front-end circuit for generating the transmission signal according to the filtered signal.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: February 24, 2015
    Assignee: Realtek Semiconductor Corporation
    Inventors: Sheng-Fu Chuang, Liang-Wei Huang, Ching-Yao Su, Chun-Hung Liu, Hsuan-Ting Ho, Cheng-Han Lee
  • METHOD AND DEVICE FOR DUAL-DIFFERENTIAL SENSING
    Publication number: 20150029127
    Abstract: A method and device for dual-differential sensing is disclosed. The sensing information can be generated from signals provided by a sensing device with a plurality of sensors. Each value of the sensing information corresponds to signals of three sensors, respectively. The sensing device is flexible and configured on a display. The noise effect of the display on the signal of each sensor corresponds to the distance between the display and the sensor. Besides, the noise effect of the display on each value of the sensing information corresponds to the distances between the display and the three sensors, respectively.
    Type: Application
    Filed: October 15, 2014
    Publication date: January 29, 2015
    Inventors: CHIN-FU CHANG, CHENG-HAN LEE, CHI-HAO TANG, SHUN-LUNG HO
  • Method and device for analyzing two-dimension sensing information
    Patent number: 8941597
    Abstract: A two-dimension (2-D) sensing information is analyzed for determining touch related sensing information. The touch related sensing information may include touch related sensing information with inner lower values within outer high values and with inner higher values within outer low values.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: January 27, 2015
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • No-power normally closed analog switch
    Patent number: 8928392
    Abstract: This document discusses, among other things, a switching device and method configured to receive a signal at a signal input, to provide the signal at an output in a first state without an applied voltage at a first control input, and to isolate the signal from the output in a second state with an applied voltage at the first control input. In an example, the switching device can include first, second, and third transistors, wherein the source of the first transistor is coupled to the drain of the second transistor and to the gate of the third transistor, wherein the signal input is coupled to the drain of the first transistor and to the drain of the third transistor, and wherein the output is coupled to the source of the third transistor.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: January 6, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Tony Cheng Han Lee, Shawn Barden
  • METHODS AND COMPOSITIONS FOR DIAGNOSING AND TREATING CANCER
    Publication number: 20140357516
    Abstract: The invention provides assays, methods, systems, compositions, and kits for diagnosing and treating cancer.
    Type: Application
    Filed: December 31, 2012
    Publication date: December 4, 2014
    Inventors: Jonathan A. Fletcher, Cheng-Han Lee
  • Capacitive touch screen with method and device for converting sensing information including zero cross point
    Patent number: 8896548
    Abstract: The method and device for converting sensing information are disclosed. Each first touch related sensing information of a first sensing information is detected. At least one of the first touch related sensing information is converted. Each converted first touch related sensing information is replaced by a corresponding second touch related sensing information, whereby the first sensing information is converted into a second sensing information.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: November 25, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Method and device for dual-differential sensing
    Patent number: 8890821
    Abstract: A method and device for dual-differential sensing is disclosed. The sensing information can be generated from signals provided by a sensing device with a plurality of sensors. Each value of the sensing information corresponds to signals of three sensors, respectively. The sensing device is flexible and configured on a display. The noise effect of the display on the signal of each sensor corresponds to the distance between the display and the sensor. Besides, the noise effect of the display on each value of the sensing information corresponds to the distances between the display and the three sensors, respectively.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: November 18, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Method and device for automatically calibrating touch detection
    Patent number: 8884631
    Abstract: A method and device for automatically calibrating touch detection is disclosed. The present invention includes providing a sensing layer including a plurality of sensors, and each sensor senses a sensing range, and the sensing ranges of the sensors intersecting each other to form a crossing array; continuously detecting signals of the sensors as a detection signal set; performing update of an initial signal set based on the detection signal set; and when a default signal set does not match the initial signal set and the default signal set matches the detection signal set, performing update of the initial signal set.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: November 11, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang
  • Method and device for signal detection
    Patent number: 8884914
    Abstract: A method and device for signal detection is disclosed. At least one detection period is predefined for detecting a signal of a signal source, a differential signal of a pair of signal sources, or a dual-differential signal of three signal sources during at least one clock cycle, wherein the detection evades the period of a predictable noise.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: November 11, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho, Guang-Huei Lin
  • Method and device for analyzing two-dimension sensing information
    Patent number: 8872776
    Abstract: A two-dimension (2D) sensing information is analyzed for determining touch related sensing information. The touch related sensing information may include touch related sensing information with inner low values within outer high values and with inner higher values within outer low values.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: October 28, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Method and device for determining a touch or touches
    Patent number: 8842079
    Abstract: A method and device for determining a single touch or multiple touches is disclosed. A touch related sensing information with a single zero-crossing is used for determining a pair of values, and the locations of a pair of centroids are calculated depending on the pair of values. The distance between the locations of the pair of centroids can be used to determine whether the number of touches is one or more.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: September 23, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Capacitive touch screen with square or rhombus conductive strips with extension pads
    Patent number: 8830205
    Abstract: The present invention provides a mutual capacitive multi-touch screen. The conductive strip pattern allows that, when a touch range of each external conductive object on the mutual capacitive multi-touch screen is larger than a predetermined condition, capacitive coupling between each external conductive object and first conductive strip is greater than capacitive coupling between each external conductive object and second conductive strip, such that the proportion of a driving signal flowing out of the first conductive strip via at least one first external conductive object in the external conductive objects and into the second conductive strip via at least one second external conductive object in the external conductive objects decreases as the number of second external conductive objects increases.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: September 9, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee
  • Method and device for signal detection
    Patent number: 8816987
    Abstract: A method and device for signal detection is disclosed. At least one detection period is predefined for detecting a signal of a signal source, a differential signal of a pair of signal sources, or a dual-differential signal of three signal sources during at least one clock cycle.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: August 26, 2014
    Assignee: Egalax—Empia Technology Inc.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho