Patents by Inventor Guo-Kiang Hung
Guo-Kiang Hung 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: 8410958Abstract: A digital apparatus includes a timing control circuit, a period counter, a phase digitizer and a calculation circuit. The timing control circuit generates a first control signal according to a square wave signal and a predetermined value. The period counter generates a first digital value according to a reference clock signal and the first control signal. The phase digitizer generates a second digital value according to a phase difference between the square wave signal and the reference clock signal. The calculation circuit generates an output digital value according to the first digital value and the second digital value. An object of obtaining a high-resolution digitization with a reasonable sampling clock is realized by effectively combining the period counter with the phase digitizer.Type: GrantFiled: March 18, 2010Date of Patent: April 2, 2013Assignee: MStar Semiconductor, Inc.Inventors: Tsung-Fu Lin, Guo-Kiang Hung, Yi Cheng Hsieh
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Publication number: 20120313669Abstract: A level shifter and an associated booster driving circuit are provided. The level shifter includes an input stage and an output stage. The input stage includes an input switch, which receives an input signal and is selectively turned on according to the input signal. The output stage outputs a gate driving signal. The gate driving signal is at a low logic level when the input switch is turned on, and is at a high logic level when the input switch is turned off. The logic level of the input signal is substantially the same as the logic level of the gate driving signal.Type: ApplicationFiled: September 13, 2011Publication date: December 13, 2012Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Hsuan-I Pan, Guo-Kiang Hung
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Publication number: 20120299869Abstract: A capacitance sensing apparatus applied to a touch panel is provided. The capacitance sensing apparatus includes a plurality of sensor channels including a first sensor channel and a second sensor channel neighboring to each other. A first voltage signal is outputted to the first sensor channel. A plurality of capacitances of the first sensor channel are detected to generate a first capacitance result for touch sensing. A second voltage signal is outputted to the second sensor channel. A first voltage difference is present when the first voltage signal and the second voltage signal are respectively outputted to the first sensor channel and the second sensor channel, and a second voltage difference is present when the capacitance of the first sensor channel. The first voltage difference and the second voltage difference are substantially the same.Type: ApplicationFiled: January 6, 2012Publication date: November 29, 2012Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Guo-Kiang Hung, Hsuan-I Pan, Ting-Hao Yeh, Kai-Ting Ho
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Publication number: 20120274304Abstract: A low-voltage-driven boost circuit is provided. The boost circuit includes an inductor, a diode, a capacitor, a first switch and a second switch. The second switch is coupled between the first switch and an anode of the diode. The first switch selectively conducts according to a switch signal, and the second switch conducts as the first switch conducts.Type: ApplicationFiled: November 22, 2011Publication date: November 1, 2012Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Song-Yi Lin, Hsuan-I Pan, Guo-Kiang Hung
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Publication number: 20120235691Abstract: A touch sensing device is provided. A shielding plate is provided for covering and shielding wires that route sensing electrodes to a flexible circuit board. Alternatively, a conductive layer of the circuit board is applied for shielding a plurality of contacts of the electrodes and wires. Wires that couple two same typed electrodes extend as a shielding plate for shielding contacts of another type of electrodes. An auxiliary electrode bordering outside the sensing electrodes can be provided to compensate fringe effects of the sensing electrodes.Type: ApplicationFiled: March 15, 2012Publication date: September 20, 2012Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Kai-Ting Ho, Hsuan-I Pan, Guo-Kiang Hung
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Publication number: 20120235936Abstract: A method for multi-touch control and associated apparatus is provided. The method includes indentifying two peak sensing values from a plurality of sensing values of a touch panel, providing a threshold according to intrinsic characteristics of the touch panel and features of the sensing values, comparing whether the sensing values between the two peak sensing values are lower than the threshold, and selectively reporting multi-touch events.Type: ApplicationFiled: March 14, 2012Publication date: September 20, 2012Applicant: MStar Semiconductor, Inc.Inventors: Ting-Hao Yeh, Guo-Kiang Hung
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Publication number: 20120086656Abstract: A touch sensing circuit and method is provided. The touch sensing circuit discriminates a common voltage change of a display panel couple to the touch sensor in a touch panel display apparatus. The touch sensor comprises a plurality of sensor electrodes. The touch sensing circuit includes a plurality of channel circuits, each of which includes a reset switch and a sensing switch for alternately conducting an associated sensor electrode to a reset voltage and a charge collecting circuit. The channel circuits are divided to different groups that operate according to interleaving timings for encompassing possible common voltage changes.Type: ApplicationFiled: October 5, 2011Publication date: April 12, 2012Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Guo-Kiang Hung, Hsuan-I Pan, Ming-Chang Tsai, Meng-Chang Lee, Shih-Tsung Yang
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Publication number: 20110187672Abstract: A conductive layer of a touch sensor and a pixel electrode conductive layer of a display panel are integrated to a touch display panel during the same fabrication. The touch sensor defines a plurality of sensor groups that are insulated from each other in a same conductive layer, and each of the sense groups is divided into a plurality of mutually-coupled first electrodes, a plurality of mutually-coupled second electrodes and a plurality of mutually-coupled third electrodes. The first electrodes and the third electrodes are insulated from each other and are horizontally interlaced. The first electrodes and the second electrodes are insulated from each other and are located on opposite sides of a horizontal symmetry axis. A gain for compensating a vertical coordinate of a touch position is introduced according to capacitance variances of the first electrodes and the second electrodes.Type: ApplicationFiled: November 19, 2010Publication date: August 4, 2011Applicant: MStar Semiconductor, Inc.Inventors: Guo-Kiang Hung, Kai-Ting Ho
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Publication number: 20110050605Abstract: A touch sensing module includes a first sensing layer having a plurality of first sensing electrodes, and a second sensing layer having a plurality of second sensing electrodes. Each of the gaps between neighboring second sensing electrodes is much smaller than the width of the second sensing electrodes to improve signal quality.Type: ApplicationFiled: June 22, 2010Publication date: March 3, 2011Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Hsuan-I Pan, Guo-Kiang Hung
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Publication number: 20110025644Abstract: A touch control apparatus includes a touch panel and a sensing control apparatus. The touch panel includes a plurality of sensing lines, and the sensing control apparatus includes a plurality of pins that are respectively coupled to the sensing lines. The sensing control apparatus adaptively controls a sequence for scanning the pins according to connection relationships between the pins and the sensing lines.Type: ApplicationFiled: July 28, 2010Publication date: February 3, 2011Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Tsung-Fu Lin, Guo-Kiang Hung, Yi Cheng Hsieh
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Publication number: 20100308917Abstract: A de-pop controller and method thereof are provided. The controller includes an amplifier and a comparator. The amplifier receives and amplifies an audio input signal, and then outputs an audio output signal. The comparator, coupled to the amplifier, receives a transient indication signal. The comparator compares the transient indication signal with a reference voltage, and the comparison result is then applied to control the driving ability of the amplifier for de-popping.Type: ApplicationFiled: May 28, 2010Publication date: December 9, 2010Applicant: MStar Semiconductor, Inc.Inventors: Guo-Kiang Hung, Tso Min Chen
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Publication number: 20100289774Abstract: A capacitive touch sensing structure includes: a substrate; a plurality of first electrode groups arranged from a first position towards a second position in a first direction, wherein each of the first electrode groups includes a plurality of first electrodes extended from a third position towards a fourth position in a second direction; a plurality of first conducting wires each having a plurality of contacts respectively coupled to the first electrodes of each of the first electrode groups; a plurality of second electrode groups arranged from the first position towards the second position in the first direction, wherein each of the second electrode groups includes a plurality of second electrodes extended from the fourth position towards the third position in the second direction and respectively staggering with the first electrode groups; and a plurality of second conducting wires each having a plurality of contacts respectively coupled to the electrodes of each of the second electrode groups.Type: ApplicationFiled: May 14, 2010Publication date: November 18, 2010Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Hsuan-I Pan, Guo-Kiang Hung
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Patent number: 7825892Abstract: The present invention discloses a backlight driving signal generator used in a liquid crystal display (LCD) controller. The backlight driving signal generator is coupled to a backlight driving circuit of the LCD and capable of issuing a first pulse signal and a second pulse signal to control the backlight driving circuit to function accordingly. In a preferred aspect, the backlight signal generator is capable of being adapted for the backlight driving circuit of cold cathode fluorescent lamps (CCFLs) or that of light emitting diodes (LEDs).Type: GrantFiled: November 17, 2006Date of Patent: November 2, 2010Assignee: Mstar Semiconductor, Inc.Inventors: Song-Yi Lin, Guo-Kiang Hung
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Publication number: 20100253550Abstract: A digital apparatus includes a timing control circuit, a period counter, a phase digitizer and a calculation circuit. The timing control circuit generates a first control signal according to a square wave signal and a predetermined value. The period counter generates a first digital value according to a reference clock signal and the first control signal. The phase digitizer generates a second digital value according to a phase difference between the square wave signal and the reference clock signal. The calculation circuit generates an output digital value according to the first digital value and the second digital value. An object of obtaining a high-resolution digitization with a reasonable sampling clock is realized by effectively combining the period counter with the phase digitizer.Type: ApplicationFiled: March 18, 2010Publication date: October 7, 2010Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Tsung-Fu Lin, Guo-Kiang Hung, Yi Cheng Hsieh
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Publication number: 20100188366Abstract: A touch sensing device capable of accurately detecting a touched position on a touch panel includes a touch panel, a conversion unit and a calculation unit. The touch panel having a plurality of horizontal sensing lines and vertical sensing lines generates a plurality of horizontal sensing signals and vertical sensing signals in response to a touch on the touch panel. The conversion unit generates a plurality of two-dimensional (2D) sensing signals according to the horizontal and vertical sensing signals. The calculation unit determines a touched position on the touch panel according to the 2D sensing signals.Type: ApplicationFiled: January 22, 2010Publication date: July 29, 2010Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Chi Kang Liu, Guo-Kiang Hung
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Publication number: 20100117987Abstract: A touch sensing method and associated circuit are provided. In one aspect, a touch control circuit includes a first current source, a second current source, a plurality of switches, a hysteresis comparator, a frequency divider and a flip-flop. The switches are couple to a plurality of external contact points. The hysteresis comparator is coupled to a first reference comparison voltage and a second reference comparison voltage. Each of the external contact points is selectively coupled to an input terminal of the hysteresis comparator through the switches. The first current source and the second current source are coupled to the input terminal of the hysteresis comparator to generate a sensing voltage. The hysteresis comparator compares the sensing voltage with the first reference comparison voltage and the second reference comparison voltage to generate a hysteresis comparison output to control the first current source or the second current source.Type: ApplicationFiled: January 20, 2010Publication date: May 13, 2010Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Tsung-Fu Lin, Tso Min Chen, Yi Cheng Hsieh, Guo-Kiang Hung
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Publication number: 20100073351Abstract: An ultra-low-power display control circuit and associated method is provided. The ultra-low-power display control circuit comprises a power conversion controller, a first capacitor, a transforming device, a second capacitor, a regulator, an opto-coupler and a display controller. The first capacitor couples to the power conversion controller and the transforming device. The transforming device converts the relatively-high voltage to a relatively-low voltage. The second capacitor stabilizes the relatively-low voltage. The regulator regulates the relatively-low voltage to generate a regulated voltage output. The display controller is powered by the regulated voltage output.Type: ApplicationFiled: September 10, 2009Publication date: March 25, 2010Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: SONG-YI LIN, GUO-KIANG HUNG
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Patent number: 7391628Abstract: A switching controller having frequency hopping is used for reducing the EMI of a power supply. A pattern generator generates a digital pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of a switching signal. A programmable capacitor coupled to the oscillator modulates the switching frequency in response to the variation of the digital pattern code. An attenuator connected to a voltage feedback loop attenuates a feedback signal. The feedback signal controls the pulse width of the switching signal. A programmable resistor coupled to the attenuator determines an attenuation rate of the attenuator in response to the digital pattern code. The attenuation rate is increased as the switching frequency increases. The pulse width of the switching signal is thus reduced, which compensates the decrease of the switching period and keeps the output power and the output voltage constant.Type: GrantFiled: February 27, 2007Date of Patent: June 24, 2008Assignee: System General Corp.Inventors: Ta-yung Yang, Guo-Kiang Hung, Song-Yi Lin
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Patent number: 7362592Abstract: The present invention discloses a switching control circuit for a primary-side controlled power converter. A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal. A current-waveform detector generates a current-waveform signal by measuring a primary-side switching current. An integrator generates a current-feedback signal by integrating the current-waveform signal with the discharge time. A time constant of the integrator is correlated with the switching frequency, thus the current-feedback signal is proportional to an output current of the power converter. A PWM circuit controls the pulse width of the switching signal in response to the outputs of a voltage-loop error amplifier and a current-loop error amplifier. The output voltage and the maximum output current of the power converter are therefore regulated.Type: GrantFiled: September 16, 2004Date of Patent: April 22, 2008Assignee: System General Corp.Inventors: Ta-yung Yang, Guo-Kiang Hung, Jenn-yu G. Lin, Chuh-Ching Li, Shao-Wei Chiu
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Patent number: 7362593Abstract: A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal by multi-sampling a voltage signal of a transformer. The discharge-time signal represents a discharge time of a secondary-side switching current. A voltage-loop error amplifier amplifies the voltage-feedback signal and generates a control signal. An off-time modulator correspondingly generates a discharge-current signal and a standby signal in response to the control signal and an under-voltage signal. The under-voltage signal indicates a low supply voltage of the controller. An oscillator produces a pulse signal in response to the discharge-current signal. The pulse signal determines the off-time of the switching signal. A PWM circuit generates the switching signal in response to the pulse signal and the standby signal. The standby signal further controls the off-time of the switching signal and maintains a minimum switching frequency. The switching signal is used for regulating the output of the power supply.Type: GrantFiled: September 16, 2004Date of Patent: April 22, 2008Assignee: System General Corp.Inventors: Ta-yung Yang, Guo-Kiang Hung, Jenn-yu G. Lin, Chuh-Ching Li, Feng Cheng Tsao