Patents by Inventor Junqiao Liu
Junqiao Liu 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: 11775108Abstract: A touch display apparatus, a corresponding driving circuit, and a driving method are provided. The touch display apparatus includes a driving circuit configured to, during the touch sensing stage, provide a first signal to a common electrode for realizing touch detection during the touch sensing stage, a second signal used to control a thin film transistor of the touch display apparatus to be switched off and is used to decrease charge and discharge capacity of a capacitor formed by the common electrode and the gate line, and a third signal used to decrease charge and discharge capacity of a capacitor formed by the common electrode and a data line. The third signal is used to control the data line to enter a floating state during the touch sensing stage.Type: GrantFiled: May 2, 2021Date of Patent: October 3, 2023Assignee: FOCALTECH ELECTRONICS, LTD.Inventors: Lianghua Mo, Xinxi Jiang, Junqiao Liu
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Publication number: 20210271368Abstract: A touch display apparatus, a corresponding driving circuit, and a driving method are provided. The touch display apparatus includes a driving circuit configured to, during the touch sensing stage, provide a first signal to a common electrode for realizing touch detection during the touch sensing stage, a second signal used to control a thin film transistor of the touch display apparatus to be switched off and is used to decrease charge and discharge capacity of a capacitor formed by the common electrode and the gate line, and a third signal used to decrease charge and discharge capacity of a capacitor formed by the common electrode and a data line. The third signal is used to control the data line to enter a floating state during the touch sensing stage.Type: ApplicationFiled: May 2, 2021Publication date: September 2, 2021Applicant: FOCALTECH ELECTRONICS, LTD.Inventors: Lianghua MO, Xinxi JIANG, Junqiao LIU
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Publication number: 20180341365Abstract: A touch display apparatus, a corresponding driving circuit, and a driving method are provided. The touch display apparatus includes a driving circuit configured to, during the touch sensing stage, provide a first signal to a common electrode for realizing touch detection during the touch sensing stage, a second signal used to control a thin film transistor of the touch display apparatus to be switched off and is used to decrease charge and discharge capacity of a capacitor formed by the common electrode and the gate line, and a third signal used to decrease charge and discharge capacity of a capacitor formed by the common electrode and a data line. The third signal is used to control the data line to enter a floating state during the touch sensing stage.Type: ApplicationFiled: August 6, 2018Publication date: November 29, 2018Applicant: FOCALTECH ELECTRONICS, LTD.Inventors: Lianghua MO, Xinxi JIANG, Junqiao LIU
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Patent number: 10073562Abstract: A touch display apparatus, a corresponding driving circuit, and a driving method. The touch display apparatus includes a common electrode between a first substrate and a second substrate, and a driving circuit used as a touch sensing electrode during a touch sensing phase. The driving circuit is used for providing a first signal for touch detection to the common electrode. The driving circuit is also used for providing a second signal to a gate line during the touch sensing phase, said second signal enabling a thin-film transistor to be in off mode and decreasing the charge-discharge capacity of a capacitor formed by the common electrode and a gate line. The driving circuit is also used for providing a third signal during the touch sensing phase, the third signal decreasing the charge-discharge capacity of a capacitor formed by the common electrode and a data line.Type: GrantFiled: February 14, 2014Date of Patent: September 11, 2018Assignee: FOCALTECH ELECTRONICS, LTD.Inventors: Lianghua Mo, Xinxi Jiang, Junqiao Liu
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Patent number: 9773148Abstract: A display device is provided. The display device includes: a display panel provided with a plurality of display electrodes, where the display electrodes are configured for displaying images, display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are configured for fingerprint sensing, and a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage; and a driving circuit configured to, provide display signals to the display electrodes to display the images, and provide a fingerprint sensing signal to the first electrodes during the fingerprint sensing stage and perform a self-capacitance detection on the first electrodes, to implement the fingerprint sensing. A driving circuit, a method for driving the display device, a liquid crystal display device and an electronic apparatus including the display device are provided.Type: GrantFiled: December 30, 2014Date of Patent: September 26, 2017Assignee: FOCALTECH ELECTRONICS, LTD.Inventors: Lianghua Mo, Junqiao Liu, Haijun Hu, Jie Liu
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Publication number: 20160334934Abstract: A touch display apparatus, a corresponding driving circuit, and a driving method. The touch display apparatus includes a common electrode between a first substrate and a second substrate, and a driving circuit used as a touch sensing electrode during a touch sensing phase. The driving circuit is used for providing a first signal for touch detection to the common electrode. The driving circuit is also used for providing a second signal to a gate line during the touch sensing phase, said second signal enabling a thin-film transistor to be in off mode and decreasing the charge-discharge capacity of a capacitor formed by the common electrode and a gate line. The driving circuit is also used for providing a third signal during the touch sensing phase, the third signal decreasing the charge-discharge capacity of a capacitor formed by the common electrode and a data line.Type: ApplicationFiled: February 14, 2014Publication date: November 17, 2016Applicant: FOCALTECH ELECTRONICS, LTD.Inventors: Lianghua MO, Xinxi JIANG, Junqiao LIU
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Publication number: 20150254491Abstract: A display device is provided. The display device includes: a display panel provided with a plurality of display electrodes, where the display electrodes are configured for displaying images, display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are configured for fingerprint sensing, and a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage; and a driving circuit configured to, provide display signals to the display electrodes to display the images, and provide a fingerprint sensing signal to the first electrodes during the fingerprint sensing stage and perform a self-capacitance detection on the first electrodes, to implement the fingerprint sensing. A driving circuit, a method for driving the display device, a liquid crystal display device and an electronic apparatus including the display device are provided.Type: ApplicationFiled: December 30, 2014Publication date: September 10, 2015Applicant: FOCALTECH SYSTEMS, LTD.Inventors: Lianghua MO, Junqiao LIU, Haijun HU, Jie LIU
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Publication number: 20140176497Abstract: A method of avoiding the mutual interference of touch detection with LCD scan, based on the LCD touch screen set with capacitive touch sensor. As to the said method, first of all, divide the entire LCD touch screen into at least two regions; then, set the touch detection timing sequence and LCD scan timing sequence for the LCD touch screen, enabling the touch detection process and LCD scan process to meet the condition of only conducting one process of touch detection process and LCD scan process within the same time period and same region, thus, enabling both of the touch detection process and LCD scan process to keep mutual independent running status either in time domain or in spatial domain. The invention has separated the touch detection process and LCD scan process from time domain and spatial domain, avoiding mutual interaction and mutual interference of the two processes.Type: ApplicationFiled: December 18, 2013Publication date: June 26, 2014Applicant: FocalTech Systems, Ltd.Inventors: Michael Mo, Xinxi Jiang, Junqiao Liu
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Patent number: 8730207Abstract: A method of driving and detection for a capacitive touch screen and a device thereof are provided. The method includes: sending, from a driving side, excitation signals through a plurality of channels simultaneously during the same driving and detection time period; receiving, by each of receiving channels at a receiving side, a charge signal generated from the excitation signals through coupling capacitances at corresponding touch detection points, and performing detection, which includes: converting and amplifying the charge signal into a voltage signal, and performing signal demodulation and analog-to-digital conversion on the voltage signal; and storing digital signals obtained from the analog-to-digital conversion, and analyzing the digital signals by a controller to obtain a detection result. This can achieve rapid scan, increase frame rate in detection, and meet the rapidity requirement for performing display driving and touch detection at different time slots.Type: GrantFiled: July 30, 2012Date of Patent: May 20, 2014Assignee: Focaltech Systems, Ltd.Inventors: Lianghua Mo, Junqiao Liu
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Publication number: 20130314366Abstract: A method of driving and detection for a capacitive touch screen and a device thereof are provided. The method includes: sending, from a driving side, excitation signals through a plurality of channels simultaneously during the same driving and detection time period; receiving, by each of receiving channels at a receiving side, a charge signal generated from the excitation signals through coupling capacitances at corresponding touch detection points, and performing detection, which includes: converting and amplifying the charge signal into a voltage signal, and performing signal demodulation and analog-to-digital conversion on the voltage signal; and storing digital signals obtained from the analog-to-digital conversion, and analyzing the digital signals by a controller to obtain a detection result. This can achieve rapid scan, increase frame rate in detection, and meet the rapidity requirement for performing display driving and touch detection at different time slots.Type: ApplicationFiled: July 30, 2012Publication date: November 28, 2013Applicant: FOCALTECH SYSTEMS, LTD.Inventors: Lianghua Mo, Junqiao Liu