Patents by Inventor Yafeng Li
Yafeng Li 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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Publication number: 20180033712Abstract: The invention provides an array substrate and activation method for TFT elements in the array substrate. The array substrate comprises a shielding metal layer (10) and a TFT layer (20) disposed on the shielding metal layer (10); by connecting the shielding metal blocks (11) on the shielding metal layer (10) to electricity to heat up the shielding metal blocks (11) for pre-heating the TFT layer (20) to accelerate activating the TFT elements in the TFT layer (20). The activation method, by connecting the shielding metal blocks (11) on the shielding metal layer (10) to electricity to heat up the shielding metal blocks (11) for pre-heating the TFT layer (20) before activating the TFT elements in the TFT layer (20), accelerates activating the TFT elements in the TFT layer (20). The method is applicable to activating the TFT elements in array substrate in low temperature environment.Type: ApplicationFiled: January 28, 2016Publication date: February 1, 2018Inventors: Yafeng Li, Xiangyi Peng
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Patent number: 9875709Abstract: The invention provides a GOA circuit for LTPS-TFT, using a resistor (R1) and a tenth TFT (T10) to replace the second capacitor in known technology, and change the diode-style connection of the ninth TFT (T9) in known technology to connect one end of the resistor (R1) to the constant high voltage (VGH) and the other to the gate of the ninth TFT (T9) so that during the output end (G(n)) staying at low, the voltage of the second node (P(n)) follows the (M+1)-th clock signal (CK(M+1)) to switch between high and low, that is, following a fixed frequency to pull down the voltage of the second node (P(n)), prevents the second node from staying at high for long duration and prevents the sixth TFT (T6) and the seventh TFT (T7) from prolonged operation to cause threshold voltage shift and improve GOA circuit stability.Type: GrantFiled: January 28, 2016Date of Patent: January 23, 2018Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Yafeng Li
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Patent number: 9857619Abstract: The present disclosure discloses a display panel, including a color filter plate substrate and an array substrate; the color filter plate substrate includes a black matrix and a protective layer; the color filter plate substrate and the array substrate are disposed opposite; the protective layer is disposed on a side of the black matrix oriented to the array substrate in a laser incidence region during laser repair. The protective layer is disposed on a side of the black matrix oriented to the array substrate in a laser incidence region during laser repair according to the disclosure, therefore, the preventive layer can protect the black matrix during laser repair from forming a through-hole on the black matrix that can leak light.Type: GrantFiled: January 28, 2016Date of Patent: January 2, 2018Assignee: Wuhan China Star Optoelectronics Technology Co., LtdInventors: Yafeng Li, Xiangyi Peng
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Patent number: 9841620Abstract: The present invention provides a GOA circuit based on LTPS semiconductor thin film transistor to control the voltage levels of the first node, the second node and the third node (Q(n), P1(n), P2(n)) with the forward scan direct current control signal (U2D) and the backward scan direct current control signal (D2U). The clock signal (CK(M)) is merely in charge of the output of the GOA unit of corresponding stage, which can effectively reduce the loading of the clock signal. It ensures that the entire loading of the clock signal after the GOA units of multiple stages are coupled to promote the output stability of the GOA circuit, and to realize the forward-backward scan of the GOA circuit.Type: GrantFiled: December 29, 2015Date of Patent: December 12, 2017Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Yafeng Li
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Patent number: 9805675Abstract: The disclosure discloses a GOA circuit based on the LTPS, including a modulation circuit; a charging circuit; an input signal terminal and an output signal terminal. The modulation circuit and the charging circuit are connected to the input signal terminal and the output signal terminal to make the modulation circuit and the charging circuit in parallel connection, and the charging circuit is used to charge the output scanning signal during the mutation process to increase the mutation speed of the output scanning signal. Wherein the charging circuit is a switch including a control terminal, a first terminal, and a second terminal; the input signal terminal is connected to the first terminal of the charging circuit. The output signal terminal is connected to the second terminal and the control terminal of the charging circuit separately. A display apparatus including the GOA circuit based on the LTPS is also provided.Type: GrantFiled: February 1, 2016Date of Patent: October 31, 2017Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Yafeng Li, Mang Zhao
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Publication number: 20170301303Abstract: The invention provides a GOA circuit for LTPS-TFT, using a resistor (R1) and a tenth TFT (T10) to replace the second capacitor in known technology, and change the diode-style connection of the ninth TFT (T9) in known technology to connect one end of the resistor (R1) to the constant high voltage (VGH) and the other to the gate of the ninth TFT (T9) so that during the output end (G(n)) staying at low, the voltage of the second node (P(n)) follows the (M+1)-th clock signal (CK(M+1)) to switch between high and low, that is, following a fixed frequency to pull down the voltage of the second node (P(n)), prevents the second node from staying at high for long duration and prevents the sixth TFT (T6) and the seventh TFT (T7) from prolonged operation to cause threshold voltage shift and improve GOA circuit stability.Type: ApplicationFiled: January 28, 2016Publication date: October 19, 2017Inventor: Yafeng Li
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Patent number: 9792871Abstract: A GOA circuit includes GOA circuit units. When scan signal outputted by a previous stage GOA circuit unit and a next stage GOA circuit unit are at a low level, a fifth transistor controlled by the scan signal of previous stage GOA circuit unit and a sixth transistor controlled by the scan signal of a next stage GOA circuit unit turn on, so that the current stage GOA circuit unit starts to operate, and voltage of a control node becomes the same as the first constant voltage. When a third clock signal is triggered, the scan signal of the previous stage GOA circuit unit is charged from the low level, which was maintained previously, to the first constant voltage. Therefore, scan signal of GOA circuit unit will not affect the normal stage transmission of other GOA circuit units, and mitigate the problem of outputting redundant scan signal pulse.Type: GrantFiled: December 23, 2015Date of Patent: October 17, 2017Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.Inventors: Mang Zhao, Yafeng Li
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Patent number: 9786478Abstract: The invention generally relates to zero volt mass spectrometry probes and systems. In certain embodiments, the invention provides a system including a mass spectrometry probe including a porous material, and a mass spectrometer (bench-top or miniature mass spectrometer). The system operates without an application of voltage to the probe. In certain embodiments, the probe is oriented such that a distal end faces an inlet of the mass spectrometer. In other embodiments, the distal end of the probe is 5 mm or less from an inlet of the mass spectrometer.Type: GrantFiled: December 3, 2015Date of Patent: October 10, 2017Assignee: Purdue Research FoundationInventors: Robert Graham Cooks, Michael Stanley Wleklinski, Soumabha Bag, Yafeng Li
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Publication number: 20170285374Abstract: The present invention provides a GOA circuit based on LTPS semiconductor thin film transistor to control the voltage levels of the first node, the second node and the third node (Q(n), P1(n), P2(n)) with the forward scan direct current control signal (U2D) and the backward scan direct current control signal (D2U). The clock signal (CK(M)) is merely in charge of the output of the GOA unit of corresponding stage, which can effectively reduce the loading of the clock signal. It ensures that the entire loading of the clock signal after the GOA units of multiple stages are coupled to promote the output stability of the GOA circuit, and to realize the forward-backward scan of the GOA circuit.Type: ApplicationFiled: December 29, 2015Publication date: October 5, 2017Inventor: Yafeng Li
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Patent number: 9779684Abstract: A GOA circuit includes GOA circuit units coupled in series. Each GOA circuit unit includes an input control module, an output control module, a pull-down module, and a pull-up holding module. The input control module includes a first transistor, a second transistor, a third transistor, and a fourth transistor. Each GOA circuit unit includes ten transistors. Because the GOA circuit unit proposed by the present invention comprises fewer transistors, it is good for being used in displays with a narrow bezel. In addition, the GOA circuit unit comprises an input control module comprising a second transistor and a third transistor controlled by a first gate turn-on signal. A first transistor and the second transistor are connected in series, and the third transistor and a fourth transistor are connected in series, which reduces leakage current. It provides a beneficiary effect that the stability of the GOA circuit unit is improved.Type: GrantFiled: December 22, 2015Date of Patent: October 3, 2017Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Yafeng Li
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Publication number: 20170270881Abstract: A GOA circuit includes GOA circuit units. Each of the GOA circuit units at each stage includes an input control module, an output control module, and a pull-down module. The pull-down module includes a first transistor, a second transistor, a third transistor, and a resistor. The GOA circuit unit uses fewer transistors and fewer capacitors. Therefore, the GOA circuit unit proposed by the present invention is beneficial for being used in displays with a narrow bezel. In addition, the GOA circuit unit omits a capacitor so power generated after the capacitor is charged is reduced. It provides a beneficiary effect of reducing power of the whole GOA circuit.Type: ApplicationFiled: January 13, 2016Publication date: September 21, 2017Inventor: Yafeng LI
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Publication number: 20170256221Abstract: A GOA substrate includes N shift register units. The first stage shift register unit outputs a scan signal pulse based on a first clock signal and a start signal. The last stage shift register unit outputs a scan signal pulse based on Mth clock signal and the start signal. The start signal has a pulse width starting from a falling edge of the Mth clock signal of the last stage shift register unit when scanning a first frame, and ending at a rising edge of the first clock signal of the first stage shift register unit when scanning a second frame. Since the first and last shift register units are used to drive a scan signal pulse based on the start signal, the present invention reduces the number of wires needed to transmit start signals and simplifies the complexity of the layout design.Type: ApplicationFiled: December 23, 2015Publication date: September 7, 2017Applicant: WUHAN CHINA STAR OPYOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Yafeng Li
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Publication number: 20170255065Abstract: A liquid crystal panel and a pixel structure thereof are described. The pixel structure has a common electrode, a protecting layer, a plurality of pixel electrodes, and a plurality of first channels. The protecting layer is located on the common electrode; the pixel electrodes are located on the protecting layer; and the first channels are located between the neighboring pixel electrodes and pass through the protecting layer, so that the first channels expose a top surface of the common electrode.Type: ApplicationFiled: January 12, 2016Publication date: September 7, 2017Inventors: Yafeng LI, Xiangyi PENG
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Publication number: 20170255308Abstract: The present invention provides an in-cell touch display panel.Type: ApplicationFiled: January 29, 2016Publication date: September 7, 2017Inventors: Yafeng Li, Xiangyi Peng
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Publication number: 20170242311Abstract: The present invention relates to a display panel having a plurality of GOA circuits and an image display area. The image display area has a plurality of pixel units. The display panel further includes a plurality of tilted wiring channels configured for connecting the plurality of GOA circuits to the plurality of corresponding pixel units, respectively.Type: ApplicationFiled: January 13, 2016Publication date: August 24, 2017Inventors: Yafeng LI, Xiangyi PENG
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Publication number: 20170236479Abstract: A GOA circuit includes GOA circuit units coupled in series. Each GOA circuit unit includes an input control module, an output control module, a pull-down module, and a pull-up holding module. The input control module includes a first transistor, a second transistor, a third transistor, and a fourth transistor. Each GOA circuit unit includes ten transistors. Because the GOA circuit unit proposed by the present invention comprises fewer transistors, it is good for being used in displays with a narrow bezel. In addition, the GOA circuit unit comprises an input control module comprising a second transistor and a third transistor controlled by a first gate turn-on signal. A first transistor and the second transistor are connected in series, and the third transistor and a fourth transistor are connected in series, which reduces leakage current. It provides a beneficiary effect that the stability of the GOA circuit unit is improved.Type: ApplicationFiled: December 20, 2015Publication date: August 17, 2017Inventor: Yafeng LI
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Publication number: 20170168347Abstract: An array substrate for a liquid crystal display panel is disclosed. The array substrate includes a first substrate, a Lower Temperature Polycrystal Silicon (LTPS) Thin-Film-Transistor (TFT) disposed on the first substrate, a color photoresist layer disposed on the LTPS TFT, and multiple photo spacers disposed above the color photoresist layer. A liquid crystal display panel including the array substrate and a second substrate disposed oppositely to the array substrate is also disclosed. The present invention utilizes the second substrate to be aligned with the LTPS TFT array substrate in order to form the liquid crystal display panel. Because the second substrate is a bare substrate (without a pattern), when the second substrate is aligned with the array substrate, the alignment precision is not under consideration. Accordingly, apertures ratios of the liquid crystal display panel do not have difference.Type: ApplicationFiled: August 12, 2015Publication date: June 15, 2017Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd., WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTDInventor: Yafeng LI
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Publication number: 20170140728Abstract: A GOA circuit includes GOA circuit units. When scan signal outputted by a previous stage GOA circuit unit and a next stage GOA circuit unit are at a low level, a fifth transistor controlled by the scan signal of previous stage GOA circuit unit and a sixth transistor controlled by the scan signal of a next stage GOA circuit unit turn on, so that the current stage GOA circuit unit starts to operate, and voltage of a control node becomes the same as the first constant voltage. When a third clock signal is triggered, the scan signal of the previous stage GOA circuit unit is charged from the low level, which was maintained previously, to the first constant voltage. Therefore, scan signal of GOA circuit unit will not affect the normal stage transmission of other GOA circuit units, and mitigate the problem of outputting redundant scan signal pulse.Type: ApplicationFiled: December 23, 2015Publication date: May 18, 2017Inventors: Mang ZHAO, Yafeng LI
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Publication number: 20170124970Abstract: The disclosure discloses a GOA circuit based on the LTPS, including a modulation circuit; a charging circuit; an input signal terminal and an output signal terminal. The modulation circuit and the charging circuit are connected to the input signal terminal and the output signal terminal to make the modulation circuit and the charging circuit in parallel connection, and the charging circuit is used to charge the output scanning signal during the mutation process to increase the mutation speed of the output scanning signal. Wherein the charging circuit is a switch including a control terminal, a first terminal, and a second terminal; the input signal terminal is connected to the first terminal of the charging circuit. The output signal terminal is connected to the second terminal and the control terminal of the charging circuit separately. A display apparatus including the GOA circuit based on the LTPS is also provided.Type: ApplicationFiled: February 1, 2016Publication date: May 4, 2017Applicant: Wuhan China Star Optoelectronics Technology Co., L td.Inventors: Yafeng LI, Mang ZHAO
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Publication number: 20170123264Abstract: The present disclosure discloses a display panel, including a color filter plate substrate and an array substrate; the color filter plate substrate includes a black matrix and a protective layer; the color filter plate substrate and the array substrate are disposed opposite; the protective layer is disposed on a side of the black matrix oriented to the array substrate in a laser incidence region during laser repair. The protective layer is disposed on a side of the black matrix oriented to the array substrate in a laser incidence region during laser repair according to the disclosure, therefore, the preventive layer can protect the black matrix during laser repair from forming a through-hole on the black matrix that can leak light.Type: ApplicationFiled: January 28, 2016Publication date: May 4, 2017Applicant: Wuhan China Star Optoelectronics Technology Co., Ltd.Inventors: Yafeng LI, Xiangyi PENG