Patents by Inventor Tsun-Min Wang
Tsun-Min Wang 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: 9104277Abstract: Stimulus regions are defined based on the traces of a capacitive touch panel. A first signal is applied to a first trace in a first direction under a second signal applied to a second trace in a second direction to stimulate the second trace, to sense a stimulus region for an ADC value thereof. Calibration parameters for the traces are determined according to the ADC values of the traces without being touched, and are stored for later sensing the traces for position calculation and multi-finger calculation.Type: GrantFiled: November 15, 2010Date of Patent: August 11, 2015Assignee: ELAN MICROELECTRONICS CORPORATIONInventors: Tsun-Min Wang, Chun-Chung Huang
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Patent number: 9081438Abstract: 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: GrantFiled: January 10, 2013Date of Patent: July 14, 2015Assignee: Elan Microelectronics CorporationInventors: I-Hau Yeh, Tsun-Min Wang, Chun-Chung Huang
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Patent number: 8884909Abstract: A control circuit and a control method for a capacitive touch panel are provided. Therein, while a scanning signal charges and discharges each trace on the capacitive touch panel, a signal in phase with the scanning signal is provided to traces adjacent to the scanned trace or a ground layer under the scanned trace so as to lower parasitic capacitances between the scanned trace and the ground layer or other traces, thereby decreasing a base capacitance of the capacitive touch panel and enhancing a sensing result of the control circuit as well as providing a shielding effect and reducing noise interference so that the capacitive touch panel has improved performance.Type: GrantFiled: February 25, 2009Date of Patent: November 11, 2014Assignee: Elan Microelectronics CorporationInventors: Chun-Chung Huang, Tsun-Min Wang, Chun-Yu Lin
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Patent number: 8830201Abstract: An equalized capacitive touchpad and a touch positioning method for a capacitive touchpad use an equalizer to correct a sensed value of a mutual capacitance between two sensing lines of the capacitive touchpad, to thereby offset the attenuation of the sensed value due to the impedance of the two sensing lines. Thus, the sensed values generated from different positions along a sensing line are equalized, and the touch positioning accuracy of the capacitive touchpad is improved.Type: GrantFiled: July 22, 2013Date of Patent: September 9, 2014Assignee: Elan Microelectronics CorporationInventors: Chun-Chung Huang, Tsun-Min Wang
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Patent number: 8749520Abstract: A two-step detection for a capacitive touchpad to identify a real touch point first detects the self capacitances from multiple capacitance sensor traces of the capacitive touchpad to identify any touch point on the capacitive touchpad and then, if multiple touch points are detected, further detects the mutual capacitance at one of the detected touch points to identify whether it is a real touch point.Type: GrantFiled: July 9, 2013Date of Patent: June 10, 2014Assignee: Elan Microelectronics Corp.Inventors: Chun-Chung Huang, Tsun-Min Wang, Te-Sheng Chiu
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Patent number: 8736578Abstract: A sensing method and circuit for a capacitive touch panel sense the capacitance variation of a lateral capacitor formed at the intersection of two traces of the capacitive touch panel, to distinguish a real point from a ghost point. A sensing cycle includes two non-overlapping clock phases. In the first clock phase, the voltages across the lateral capacitor and across a sensing capacitor are set. In the second clock phase, the voltage at a first, terminal of the lateral capacitor is changed, and a second terminal of the lateral capacitor is connected to a first terminal of the sensing capacitor, causing a voltage variation at a second terminal of the sensing capacitor. This voltage variation is used to determine whether the intersection is touched. The sensing method and circuit reflect the status of the lateral capacitor in real-time and prevent the location of the touch point from being misjudged.Type: GrantFiled: March 13, 2013Date of Patent: May 27, 2014Assignee: Elan Microelectronics CorporationInventors: Tsun-Min Wang, Chun-Yu Lin, Te-Sheng Chiu, Chun-Chung Huang
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Publication number: 20140035870Abstract: 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: ApplicationFiled: September 9, 2013Publication date: February 6, 2014Applicant: Elan Microelectronic CorporationInventors: I-Hau YEH, Chi-Tein YEH, Tsun-Min WANG, Chun-Chung HUANG, Chung-Han CHENG, Hung-Ming HUANG
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Patent number: 8593429Abstract: A sensing method and circuit for a capacitive touch panel sense the capacitance variation of a lateral capacitor formed at the intersection of two traces of the capacitive touch panel, to distinguish a real point from a ghost point. A sensing cycle includes two non-overlapping clock phases. In the first clock phase, the voltages across the lateral capacitor and across a sensing capacitor are set. In the second clock phase, the voltage at a first terminal of the lateral capacitor is changed, and a second terminal of the lateral capacitor is connected to a first terminal of the sensing capacitor, causing a voltage variation at a second terminal of the sensing capacitor. This voltage variation is used to determine whether the intersection is touched. The sensing method and circuit reflect the status of the lateral capacitor in real-time and prevent the location of the touch point from being misjudged.Type: GrantFiled: January 5, 2010Date of Patent: November 26, 2013Assignee: Elan Microelectronics CorporationInventors: Tsun-Min Wang, Chun-Yu Lin, Te-Sheng Chiu, Chun-Chung Huang
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Publication number: 20130307822Abstract: An equalized capacitive touchpad and a touch positioning method for a capacitive touchpad use an equalizer to correct a sensed value of a mutual capacitance between two sensing lines of the capacitive touchpad, to thereby offset the attenuation of the sensed value due to the impedance of the two sensing lines. Thus, the sensed values generated from different positions along a sensing line are equalized, and the touch positioning accuracy of the capacitive touchpad is improved.Type: ApplicationFiled: July 22, 2013Publication date: November 21, 2013Applicant: Elan Microelectronics CorporationInventors: Chun-Chung HUANG, Tsun-Min WANG
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Publication number: 20130293514Abstract: A two-step detection for a capacitive touchpad to identify a real touch point first detects the self capacitances from multiple capacitance sensor traces of the capacitive touchpad to identify any touch point on the capacitive touchpad and then, if multiple touch points are detected, further detects the mutual capacitance at one of the detected touch points to identify whether it is a real touch point.Type: ApplicationFiled: July 9, 2013Publication date: November 7, 2013Inventors: Chun-Chung HUANG, Tsun-Min WANG, Te-Sheng CHIU
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Patent number: 8564553Abstract: 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: GrantFiled: January 4, 2010Date of Patent: October 22, 2013Assignee: Elan Microelectronics CorporationInventors: I-Hau Yeh, Chi-Tein Yeh, Tsun-Min Wang, Chun-Chung Huang, Chung-Han Cheng, Hung-Ming Huang
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Publication number: 20130265277Abstract: 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: ApplicationFiled: January 10, 2013Publication date: October 10, 2013Inventors: I-Hau YEH, Tsun-Min WANG, Chun-Chung HUANG
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Patent number: 8525801Abstract: An equalized capacitive touchpad and a touch positioning method for a capacitive touchpad use an equalizer to correct a sensed value detected from a sensing line of the capacitive touchpad, to thereby offset the attenuation of the sensed value due to the impedance of the sensing line. Thus, the sensed values generated from different positions along a sensing line are equalized, and the touch positioning accuracy of the capacitive touchpad is improved.Type: GrantFiled: March 24, 2009Date of Patent: September 3, 2013Assignee: Elan Microelectronics CorporationInventors: Chun-Chung Huang, Tsun-Min Wang, Chun-Yu Lin, Tse-Chi Lin
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Patent number: 8519975Abstract: A two-step detection for a capacitive touchpad to identify a real touch point first detects the self capacitances from multiple capacitance sensor traces of the capacitive touchpad to identify any touch point on the capacitive touchpad and then, if multiple touch points are detected, further detects the mutual capacitance at one of the detected touch points to identify whether it is a real touch point.Type: GrantFiled: June 21, 2010Date of Patent: August 27, 2013Assignee: Elan Microelectronics CorporationInventors: Chun-Chung Huang, Tsun-Min Wang, Te-Sheng Chiu
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Patent number: 8487907Abstract: A front-end signal detector and a method for improving noise immunity of a capacitive touch sensor start counting a preset time to trigger an interrupt signal responsive to a positive or negative edge of a periodic noise, to break the path through which a demodulated signal comes into a low-pass filter, to prevent noise from accumulating in the low-pass filter, and consequently mitigate the influence of the noise on the detection signal generated by the front-end signal detector.Type: GrantFiled: August 5, 2010Date of Patent: July 16, 2013Assignee: Elan Microelectronics CorporationInventors: Chun-Chung Huang, Tsun-Min Wang, Te-Sheng Chiu, Chun-Yu Lin
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Patent number: 8232972Abstract: A touch position detector includes a plurality of capacitance sensors, a negative capacitance compensation unit, an analog/digital converter and a micro processing unit. The negative capacitance compensation unit is utilized to compensate the capacitance of the capacitance sensor and get a capacitance change. The micro controller unit is utilized to detect the touch position according to the capacitance change. It is easy to get the touch position by using the touch position detector.Type: GrantFiled: January 9, 2008Date of Patent: July 31, 2012Assignee: Elan Microelectronics CorporationInventors: Chun-Chung Huang, Tsun-Min Wang, Chun-Yu Lin, Tse-Chi Lin
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Publication number: 20110115743Abstract: Stimulus regions are defined based on the traces of a capacitive touch panel. A first signal is applied to a first trace in a first direction under a second signal applied to a second trace in a second direction to stimulate the second trace, to sense a stimulus region for an ADC value thereof. Calibration parameters for the traces are determined according to the ADC values of the traces without being touched, and are stored for later sensing the traces for position calculation and multi-finger calculation.Type: ApplicationFiled: November 15, 2010Publication date: May 19, 2011Applicant: ELAN MICROELECTRONICS CORPORATIONInventors: TSUN-MIN WANG, CHUN-CHUNG HUANG
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Publication number: 20110037723Abstract: A front-end signal detector and a method for improving noise immunity of a capacitive touch sensor start counting a preset time to trigger an interrupt signal responsive to a positive or negative edge of a periodic noise, to break the path through which a demodulated signal comes into a low-pass filter, to prevent noise from accumulating in the low-pass filter, and consequently mitigate the influence of the noise on the detection signal generated by the front-end signal detector.Type: ApplicationFiled: August 5, 2010Publication date: February 17, 2011Applicant: ELAN MICROELECTRONICS CORPORATIONInventors: CHUN-CHUNG HUANG, TSUN-MIN WANG, TE-SHENG CHIU, CHUN-YU LIN
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Publication number: 20100328262Abstract: A two-step detection for a capacitive touchpad to identify a real touch point first detects the self capacitances from multiple capacitance sensor traces of the capacitive touchpad to identify any touch point on the capacitive touchpad and then, if multiple touch points are detected, further detects the mutual capacitance at one of the detected touch points to identify whether it is a real touch point.Type: ApplicationFiled: June 21, 2010Publication date: December 30, 2010Applicant: ELAN MICROELECTRONICS CORPORATIONInventors: CHUN-CHUNG HUANG, TSUN-MIN WANG, TE-SHENG CHIU
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Publication number: 20100177059Abstract: A sensing method and circuit for a capacitive touch panel sense the capacitance variation of a lateral capacitor formed at the intersection of two traces of the capacitive touch panel, to distinguish a real point from a ghost point. A sensing cycle includes two non-overlapping clock phases. In the first clock phase, the voltages across the lateral capacitor and across a sensing capacitor are set. In the second clock phase, the voltage at a first terminal of the lateral capacitor is changed, and a second terminal of the lateral capacitor is connected to a first terminal of the sensing capacitor, causing a voltage variation at a second terminal of the sensing capacitor. This voltage variation is used to determine whether the intersection is touched. The sensing method and circuit reflect the status of the lateral capacitor in real-time and prevent the location of the touch point from being misjudged.Type: ApplicationFiled: January 5, 2010Publication date: July 15, 2010Applicant: ELAN MICROELECTRONICS CORPORATIONInventors: TSUN-MIN WANG, CHUN-YU LIN, TE-SHENG CHIU, CHUN-CHUNG HUANG