Patents by Inventor I-Hau Yeh

I-Hau Yeh 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: 11068764
    Abstract: A smart card has a light-emitting element, a fingerprint sensor and a microcontroller. An operation of the smart card has a plurality of indication periods to indicate operation statuses of the smart card by the light-emitting element. The control method of the smart card includes generating a light source control signal, controlling a current supplied to the light-emitting element by the microcontroller according to the light source control signal, and decreasing the current supplied to the light-emitting element or stop the current supplied to the light-emitting element during at least one power-saying period in a first indication period of the plurality of indication periods.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: July 20, 2021
    Assignee: ELAN MICROELECTRONICS CORPORATION
    Inventors: I-Hau Yeh, Ta-Huang Liu, Hsiao-Hua Tsai, Ming-Ho Wang
  • Publication number: 20210182642
    Abstract: A smart card has a light-emitting element, a fingerprint sensor and a microcontroller. An operation of the smart card has a plurality of indication periods to indicate operation statuses of the smart card by the light-emitting element. The control method of the smart card includes generating a light source control signal, controlling a current supplied to the light-emitting element by the microcontroller according to the light source control signal, and decreasing the current supplied to the light-emitting element or stop the current supplied to the light-emitting element during at least one power-saying period in a first indication period of the plurality of indication periods.
    Type: Application
    Filed: September 28, 2020
    Publication date: June 17, 2021
    Inventors: I-Hau YEH, Ta-Huang LIU, Hsiao-Hua TSAI, Ming-Ho WANG
  • Publication number: 20210064153
    Abstract: An active stylus includes a stylus body and a touch sensor. The stylus body includes a first electrode and a pen body. The first electrode is used to send a signal. The pen body extends along a first direction. The touch sensor is provided on or in the pen body and includes a plurality of column electrodes extending along the first direction. There is a first gap between two adjacent column electrodes. Each column electrode has a first sensing electrode and a second sensing electrode. A first end of the first sensing electrode in the first direction has a recess to define a recess area. A second end of the second sensing electrode in the first direction has a projection extending into the recess area. There is a second gap between the projection and the recess. The second gap is smaller than the first gap.
    Type: Application
    Filed: August 11, 2020
    Publication date: March 4, 2021
    Inventors: I-Hau YEH, HSIAN-HONG WEI, CHIH-YU LIN
  • Publication number: 20200356745
    Abstract: A smart card with a fingerprint sensing system, includes a controller and a fingerprint sensing device. When the fingerprint sensing device senses a fingerprint to generate a fingerprint frame data, the controller enters a sleep mode, and when the controller reads the fingerprint frame data, the fingerprint sensing device stops sensing the fingerprint. Since operations of sensing the fingerprint and reading the fingerprint frame data do not occur at the same time, the high current condition can be avoided so as to decrease power consumption.
    Type: Application
    Filed: January 6, 2020
    Publication date: November 12, 2020
    Inventors: I-Hau YEH, KUO-LUNG YEN, Ta-Huang LIU, Ming-Ho WANG
  • Patent number: 10769314
    Abstract: A fingerprint sensing integrated circuit device includes a fingerprint sensing device, an encryption unit, a multiplexer and a transmission interface. The encryption unit is connected to the fingerprint sensing device. The multiplexer has an output end, a first input end and a second input end. The first input end of the multiplexer is connected to the fingerprint sensing device. The second input end of the multiplexer is connected to the encryption unit. The multiplexer connects the output end to the second end according to a selection signal. The transmission interface is connected to the output end of the multiplexer.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: September 8, 2020
    Assignee: ELAN MICROELECTRONICS CORPORATION
    Inventors: Chia-Hsing Lin, Yi-Hsin Tao, I-Hau Yeh
  • Publication number: 20190026534
    Abstract: A fingerprint sensing integrated circuit device includes a fingerprint sensing device, an encryption unit, a multiplexer and a transmission interface. The encryption unit is connected to the fingerprint sensing device. The multiplexer has an output end, a first input end and a second input end. The first input end of the multiplexer is connected to the fingerprint sensing device. The second input end of the multiplexer is connected to the encryption unit. The multiplexer connects the output end to the second end according to a selection signal. The transmission interface is connected to the output end of the multiplexer.
    Type: Application
    Filed: February 7, 2018
    Publication date: January 24, 2019
    Inventors: Chia-Hsing Lin, Yi-Hsin Tao, I-Hau Yeh
  • Publication number: 20160342252
    Abstract: A computer device with a touch controller and a method for updating the touch controller are provided in the present invention. The updating method comprise writing a first touch parameter and a first touch procedure which are saved in a memory of a BIOS or saved in a storage device with a driver program into an RAM of the touch controller when the computer device is power on so as to allow the touch controller to execute operation by utilizing the first touch parameter and the first touch procedure. Since the touch controller needs no flash memory to update a touch firmware, the cost of the touch controller is lower.
    Type: Application
    Filed: March 11, 2016
    Publication date: November 24, 2016
    Inventor: I-Hau YEH
  • Publication number: 20160239149
    Abstract: A method of identifying edge touch gesture has steps of scanning the touch device under a hover mode; scanning the touch device under a touch mode; determining if there is a touch object on the touch device according to a scanning result of the touch mode; and when there is a touch object on the touch device, identifying the gesture according to a scanning result of the hover mode and the scanning result of the touch mode. Accordingly, the method can perform valid touch on the edge area, rendering effective identification of edge touch gesture and an increased success rate of the identification.
    Type: Application
    Filed: March 24, 2016
    Publication date: August 18, 2016
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: I-Hau YEH, Yu-Jen TSAI
  • Patent number: 9323383
    Abstract: A method of identifying edge swipe gesture has steps of respectively reading sensing signals on an edge area under a hover mode and on a non-edge area under a touch mode; determining if a touch object has appeared on the edge area after determining that the object has appeared on the non-edge area, calculating a displacement of the object moving from the edge area to the non-edge area within a preset time and determining if the displacement exceeds a preset distance, and determining that the movement of the touch is identified as an edge swipe gesture if the displacement meets the condition. Accordingly, the present invention can perform valid touch on the edge area, rendering effective identification of edge swipe gesture and an increased success rate of the identification.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: April 26, 2016
    Assignee: ELAN MICROELECTRONICS CORPORATION
    Inventors: I-Hau Yeh, Yu-Jen Tsai
  • Publication number: 20160054831
    Abstract: A capacitive touch device and a method identifying touch object on the touch device read sensing information of multiple traces of a touch panel corresponding to a touch object, in which the sensing information includes a sensing cluster corresponding to a portion on the touch panel touched by the touch object, identify a hover cluster of the sensing information corresponding to a portion adjacent to and surrounding the sensing cluster, determine if the hover cluster meets a first characteristic, and determine that the touch object is a specific touch object when the hover cluster meets the first characteristic. Given the foregoing device and method, a palm rejection operation can be more accurately performed and is also applicable to object detection at corners of the touch panel.
    Type: Application
    Filed: August 3, 2015
    Publication date: February 25, 2016
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: YU-JEN TSAI, I-HAU YEH, HSUEH-WEI YANG, SHENG-FENG LI
  • Patent number: 9081438
    Abstract: A capacitive touch panel controller has a memory and multiple driving signal output units. At least one transistor of each driving signal output unit and multiple transistors of the memory are fabricated by an identical semiconductor fabrication process so that the gate oxide layers of the transistors of the driving signal output unit and the memory are identical in thickness. As the transistor of each driving signal output unit and those of the memory are fabricated by a same high-voltage semiconductor fabrication process, the transistor of each driving signal output unit can be fabricated to provide a capacitive touch panel controller having high-voltage driving capability without using any high-voltage fabrication process and increasing the production cost. Due to the high-voltage driving, the SNR and anti-interference capability can be increased.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: July 14, 2015
    Assignee: Elan Microelectronics Corporation
    Inventors: I-Hau Yeh, Tsun-Min Wang, Chun-Chung Huang
  • Patent number: 8988362
    Abstract: For object detection, a two-step group scan to the traces of a capacitive touch sensor is performed, thereby dramatically shortening the overall scanning time and reducing noise effect. After all the traces are scanned by the pre-scan step to find out the trace of a touch point, the trace of the touch point and traces adjacent thereto are scanned by the re-scan step for more accurate positioning of the touch point.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: March 24, 2015
    Assignee: Elan Microelectronics Corporation
    Inventors: I-Hau Yeh, Chun-Yu Lin
  • Publication number: 20140375577
    Abstract: A method of identifying edge swipe gesture has steps of respectively reading sensing signals on an edge area under a hover mode and on a non-edge area under a touch mode; determining if a touch object has appeared on the edge area after determining that the object has appeared on the non-edge area, calculating a displacement of the object moving from the edge area to the non-edge area within a preset time and determining if the displacement exceeds a preset distance, and determining that the movement of the touch is identified as an edge swipe gesture if the displacement meets the condition. Accordingly, the present invention can perform valid touch on the edge area, rendering effective identification of edge swipe gesture and an increased success rate of the identification.
    Type: Application
    Filed: March 17, 2014
    Publication date: December 25, 2014
    Inventors: I-Hau YEH, Yu-Jen TSAI
  • Publication number: 20140347316
    Abstract: A touch device and a measuring voltage dynamic adjustment method thereof are provided. The touch device comprises a touch panel, a touch sensing circuit and a processing unit. The touch sensing circuit electrically connected to the touch panel is configured to provide a first measuring voltage to the touch panel and sense capacitance variation of the touch panel to generate a plurality of sensing signals. The processing unit electrically connected to the touch sensing circuit is configured to receive the sensing signals, determine whether a touch is caused by a stylus according to the sensing signals and if yes, enable the touch sensing circuit to provide a second measuring voltage to the touch panel. The second measuring voltage is larger than the first measuring voltage.
    Type: Application
    Filed: March 14, 2014
    Publication date: November 27, 2014
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: I-Hau YEH, Bo-Syuan HUANG, Hsueh-Wei YANG, Yung Lieh CHIEN
  • Publication number: 20140327646
    Abstract: A touch device and a measuring voltage dynamic adjustment method thereof are provided. The touch device comprises a touch panel, a touch sensing circuit and a processing unit. The touch sensing circuit electrically connected to the touch panel is configured to provide a measuring voltage to the touch panel and sense the touch panel to generate a sensing signal. The processing unit electrically connected to the touch sensing circuit is configured to receive the sensing signal, calculate a first ratio according to the sensing signal and dynamically adjust the measuring voltage according to the first ratio.
    Type: Application
    Filed: March 14, 2014
    Publication date: November 6, 2014
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: I-Hau YEH, Bo-Syuan HUANG, Hsueh-Wei YANG, Yung Lieh CHIEN
  • Publication number: 20140035870
    Abstract: An electronic stylus emits an excitation signal to apply to a trace of a capacitive touchpad module near a touch point when the electronic stylus touches the capacitive touchpad module, so as to change a waveform of a charging/discharging signal in the trace, and depending on the waveform variation, the capacitive touchpad module can identify the touch point.
    Type: Application
    Filed: September 9, 2013
    Publication date: February 6, 2014
    Applicant: Elan Microelectronic Corporation
    Inventors: I-Hau YEH, Chi-Tein YEH, Tsun-Min WANG, Chun-Chung HUANG, Chung-Han CHENG, Hung-Ming HUANG
  • Patent number: 8564553
    Abstract: An electronic stylus emits an excitation signal to apply to a trace of a capacitive touchpad module near a touch point when the electronic stylus touches the capacitive touchpad module, so as to change a waveform of a charging/discharging signal in the trace, and depending on the waveform variation, the capacitive touchpad module can identify the touch point.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: October 22, 2013
    Assignee: Elan Microelectronics Corporation
    Inventors: I-Hau Yeh, Chi-Tein Yeh, Tsun-Min Wang, Chun-Chung Huang, Chung-Han Cheng, Hung-Ming Huang
  • Publication number: 20130265277
    Abstract: A capacitive touch panel controller has a memory and multiple driving signal output units. At least one transistor of each driving signal output unit and multiple transistors of the memory are fabricated by an identical semiconductor fabrication process so that the gate oxide layers of the transistors of the driving signal output unit and the memory are identical in thickness. As the transistor of each driving signal output unit and those of the memory are fabricated by a same high-voltage semiconductor fabrication process, the transistor of each driving signal output unit can be fabricated to provide a capacitive touch panel controller having high-voltage driving capability without using any high-voltage fabrication process and increasing the production cost. Due the high-voltage driving, the SNR and anti-interference capability can be increased.
    Type: Application
    Filed: January 10, 2013
    Publication date: October 10, 2013
    Inventors: I-Hau YEH, Tsun-Min WANG, Chun-Chung HUANG
  • Patent number: 8452338
    Abstract: Control methods for a cell phone are provided upon occurrence of a particular event, which receive a contact-related information from a touch screen of the cell phone, analyze the contact-related information to identify the contact position, the number of contact objects, or a gesture, to determine a further step to deal with the particular event. The particular event may include receipt of a call, sounding of an alarm of the cell phone, displaying of a short message on the touch screen, receipt of an interrupting call, or a standby mode of the cell phone.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: May 28, 2013
    Assignee: Elan Microelectronics Corporation
    Inventors: I-Hau Yeh, Kun-Ming Tsai, Joe Tsung-Ying Yeh, Theresa I-Hsing Yeh
  • Publication number: 20120256876
    Abstract: A capacitive touchpad has insulating blocks provided above and below a resilient layer. The insulating blocks above the resilient layer are offset in position with respect to the insulating blocks below the resilient layer. Due to the insulating blocks, a plurality of gaps are formed in the capacitive touchpad. The gaps are filled with a fluid medium. When a conductive or non-conductive object touches the capacitive touchpad, the resilient layer is deformed at the touched position and thereby displaces the fluid medium completely from the affected gaps. As a result, the distance and the dielectric coefficient between the resilient layer or an electrode plate and a sensor layer are changed, causing variation in capacitance.
    Type: Application
    Filed: April 6, 2012
    Publication date: October 11, 2012
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: I-HAU YEH, TA-FAN HSU, SHU-WEI HUANG