Patents by Inventor Wendong Li

Wendong 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).

  • Publication number: 20200306841
    Abstract: A device for removing flashes of a wheel blank includes two layers of turnover mechanisms, wherein the lower-layer turnover mechanism realizes the initial positioning of a wheel and has the function of removing the flashes at both the inner side and the outer side of an inner rim of the wheel, and the upper-layer turnover mechanism realizes the secondary positioning of the wheel and has the function of removing the flashes on the outer rim side. By means of the two layers of turnover mechanisms, the flashes on the front face and end face of a wheel blank outer rim wheel lip, and the inner side and outer side of the inner rim are removed, and coaxial processing conversion and orderly takt connection are ensured. The disclosure also provides a method for removing flashes of a wheel blank.
    Type: Application
    Filed: December 20, 2019
    Publication date: October 1, 2020
    Inventors: Huiying LIU, Jian LI, Wendong LI
  • Patent number: 10673346
    Abstract: The present disclosure proposes a circuit for reducing power consumption and a liquid crystal. The circuit includes a transformer, a first output loop, and a second output loop. The transformer includes a secondary driving winding with a first output terminal, a ground terminal, and a second output terminal arranged between the first output terminal and the ground terminal. When a voltage output by the second output terminal is less than a predetermined voltage, the first output loop is conducted and the second output loop is terminated. When a voltage output by the second output terminal is greater than the predetermined voltage, the first output loop is terminated and the second output loop is conducted.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: June 2, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: XueKun Yu, Wendong Li
  • Publication number: 20190339812
    Abstract: A method and device for controlling in-plane interference of a liquid crystal touch screen and a display system are provided. By detecting a current image of a display panel of the liquid crystal touch screen in real time, and when the image that causes the in-plane interference of the liquid crystal touch screen is detected, inverting original polarities of data voltages input to at least a portion of data lines of the display panel, so that change directions of coupled voltages of adjacent two of the data lines with respect to a common electrode are opposite to each other, solving problems of in-plane interference for the liquid crystal touch screen.
    Type: Application
    Filed: August 1, 2018
    Publication date: November 7, 2019
    Applicant: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Lei Chen, Yuhua Chang, Ming-wei Chen, Huiyang Kang, Wendong Li
  • Patent number: 10448468
    Abstract: An LED backlight driving circuit includes a first and a second LED strings; a first and a second capacitors; a boosted circuit having an input connected to a power source and an output connected to the first and second capacitors and the first and second LED strings; an LED controller electrically connected to the boosted circuit so as to control, in a first period of an operation cycle, the boosted circuit to supply power to the first branch and to charge the first capacitor and also to supply power to the second branch and to charge the second capacitor; and in a second period, LED controllers controls the boosted circuit to cut off the first and second branches to make the first and second capacitors discharge to the first and second branches, respectively. Also provided is a liquid crystal display that includes the LED backlight driving circuit.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 15, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Wendong Li
  • Patent number: 10446090
    Abstract: Embodiments of the disclosure disclose a LED backlight driving circuit, including a power source, LED strings, a buck circuit, and a LED controller. The LED strings include at least one string of LED lamps, a positive terminal thereof and the power source are electrically connected. The buck circuit and the LED strings are electrically connected. The LED controller and the buck circuit are electrically connected. The LED controller controls the power source to provide electricity to the LED strings and controls the buck circuit to store energy during a first period. The LED controller controls the buck circuit to provide electricity to the LED strings during a second period. The disclosure further provides a liquid crystal display. The disclosure has the advantage of preventing the LED backlight driving circuit from being damaged easily.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: October 15, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Wendong Li
  • Publication number: 20190307808
    Abstract: Disclosed herein are methods of treating Canavan disease in a subject through restoring ASPA enzymatic activities in the subject by expressing exogenous wild type ASPA gene in the brain of the subject. Also disclosed are a process of producing neural precursor cells, including NPCs, glial progenitor cells and oligodendroglial progenitor cells, which express an exogenous wild type ASPA gene and the neural precursor cells produced by this process.
    Type: Application
    Filed: June 22, 2017
    Publication date: October 10, 2019
    Inventors: Yanhong SHI, Jianfei CHAO, Wendong LI
  • Patent number: 10397994
    Abstract: This invention discloses a LED backlight driving circuit including: a first and a second LED strings; a first and a second capacitors; a boosted circuit, an input of which is connected to the power source and an output of which is connected to the first and the second capacitors, and the first and the second LED strings; an LED controller, electrically connected to the boosted circuit, in the first period is used for controlling the boosted circuit to supply power to the first branch and to charge the first capacitor and the same as to the second branch and the second capacitor; in the second period it is used for controlling the boosted circuit to cut off the first branch to make the first capacitor charge to the first branch and the same as to the second branch and the second capacitor. This invention also discloses a liquid crystal display.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: August 27, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Wendong Li
  • Patent number: 10356874
    Abstract: The present invention provides a backlighting dimming circuit and a liquid crystal display. The backlighting dimming circuit includes an external dimmer module (200) that receives a pulse dimming signal (PWM) to control a current regulation tube (Q1) included in the external dimmer module (200) to conduct on or cut off so as to control an LED light bar (300) to conduct on or cut off. A constant current driving chip (100) needs only one first terminal pin (1) provided thereto and through comparison of a voltage level at the first terminal pin (1) with a preset protection voltage level built in the constant current driving chip (100), an operation of conducting on or cutting of the LED light bar (300) can be carried out so that the number of the terminal pins necessary for the constant current driving chip can be reduced and thus, a packaging size of the constant current driving chip is reduced and the efficiency of tuning and testing of the backlighting dimming circuit is increased.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: July 16, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Wendong Li
  • Patent number: 10341602
    Abstract: The present invention provides a TV power supply, which comprises a main power supply and a voltage conversion circuit electrically connected to the main power supply. The main power supply comprises a first output terminal for outputting a backlight driving voltage and a second output terminal for outputting a motherboard driving voltage. The voltage conversion circuit is configured to convert the backlight driving voltage or the motherboard driving voltage to a standby voltage. The voltage conversion circuit comprises an input terminal electrically connected to the first output terminal or the second output terminal and a third output terminal for outputting the standby voltage.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: July 2, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xuekun Yu, Wendong Li
  • Patent number: 10311803
    Abstract: Provided is a backlight driving circuit, comprising voltage conversion circuit, PMW controller, zener diode, first electrical switch, optocoupler unit, boost switch and light source drive assembly. The PMW controller controls an output of the voltage conversion circuit. The light source drive assembly is connected to the boost switch and a light source to control on and off of the boost switch. A cathode of the zener diode is connected to the optocoupler unit, and an anode of the zener diode is connected to a control end of the first electric switch, and a first end of the first electrical switch is connected to the PWM controller, and a second end of the first electrical switch is grounded, and as the boost switch is short, a current outputted by the voltage conversion circuit increases, and the optocoupler unit breaks the zener diode down.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: June 4, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Wendong Li
  • Publication number: 20190159304
    Abstract: An LED backlight driving circuit includes a first and a second LED strings; a first and a second capacitors; a boosted circuit having an input connected to a power source and an output connected to the first and second capacitors and the first and second LED strings; an LED controller electrically connected to the boosted circuit so as to control, in a first period of an operation cycle, the boosted circuit to supply power to the first branch and to charge the first capacitor and also to supply power to the second branch and to charge the second capacitor; and in a second period, LED controllers controls the boosted circuit to cut off the first and second branches to make the first and second capacitors discharge to the first and second branches, respectively. Also provided is a liquid crystal display that includes the LED backlight driving circuit.
    Type: Application
    Filed: January 28, 2019
    Publication date: May 23, 2019
    Applicant: Shenzhen China Star Optoelectronics Technology Co. , Ltd.
    Inventor: Wendong LI
  • Patent number: 10298008
    Abstract: The present disclosure discloses a DC to DC boost converter, comprising a boosted circuit, a protecting circuit, a detecting circuit, a feedback control circuit, and a feedback circuit. The boosted circuit outputs voltage to the outside through the protecting circuit, the protecting circuit controls the boosted circuit to output voltage to the outside according to the current output from the boosted circuit. The detecting circuit detects the output voltage of the protecting circuit and controls whether the feedback control circuit proceeds the feedback control to the boosted circuit according to the feedback voltage of the feedback circuit or not according to the detected output voltage. The DC to DC boost converter adds the protecting circuit and the detecting circuit, which completely shuts the output down while the output is short, thus achieving short-protecting circuit and reducing power consumption.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: May 21, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Wendong Li
  • Patent number: 10277135
    Abstract: A dual-output flyback voltage conversion circuit and a display device are provided. The dual-output flyback voltage conversion circuit includes an input module, a voltage transformation module, an output module, and a feedback module. The input module is used for rectifying and filtering an input voltage. The voltage transformation module is used for performing a voltage conversion process on the input voltage which is obtained after rectifying and filtering. The output module is used for outputting a first output voltage and a second output voltage according to conversion voltages. The feedback module is used for controlling the voltage transformation module to output the input voltage which is obtained after rectifying and filtering according to the first output voltage and the second output voltage.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: April 30, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Wendong Li
  • Patent number: 10271392
    Abstract: An LLC backlight driving control circuit is disclosed and includes an LLC resonant converter circuit configured to drive a current to alter periodically; a rectifying and filtering circuit configured to balance a light bar voltage difference; a control circuit configured to implement a constant current feedback; and two paths of LED light bars configured to provide LED backlight. The LLC resonant converter circuit, the rectifying and filtering circuit, the two paths of LED light bars, and the control circuit are connected in sequence to form a loop circuit. The LLC resonant converter circuit inputs a power supply current to the two paths of LED light bars and controls an output duty cycle of the LLC resonant converter circuit by acquiring a current flowing through a sampling resistor, thereby controlling a voltage that is outputted to the two paths of LED light bars.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: April 23, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xuekun Yu, Wendong Li
  • Patent number: 10224889
    Abstract: The present disclosure discloses an audio output circuit including an audio power amplifier, a mute control circuit and a microcontroller, the audio power amplifier includes a power input terminal, a mute control terminal and an audio signal output terminal, the power input terminal is used to connect a power supply to obtain a power supply voltage, the mute control terminal is connected with the microcontroller through the mute control circuit and is grounded by a pull-down resistor, the audio signal output terminal is used to output an audio signal, the mute control circuit is also connected to the power supply for disconnecting the mute control terminal from the microcontroller when the power supply voltage is less than a preset voltage. The present disclosure also provides an audio device. According to the present disclosure, it is possible to effectively prevent the POP sound of the speaker of the audio device.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: March 5, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Wendong Li
  • Patent number: 10199857
    Abstract: Disclosed are a transformer circuit and a method of reducing idling power consumption. The transformer circuit comprises a transformer and an auxiliary winding circuit. The transformer comprises a core, a primary winding, a secondary winding and an auxiliary winding. The auxiliary winding circuit is connected to the auxiliary winding. The auxiliary winding circuit comprises a first power supply circuit and a second power supply circuit. The auxiliary winding comprises a first end, a second end and a tap located between the first end and the second end. The present invention can reduce idling power consumption.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: February 5, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Wendong Li
  • Publication number: 20190019463
    Abstract: Embodiments of the disclosure disclose a LED backlight driving circuit, including a power source, LED strings, a buck circuit, and a LED controller. The LED strings include at least one string of LED lamps, a positive terminal thereof and the power source are electrically connected. The buck circuit and the LED strings are electrically connected. The LED controller and the buck circuit are electrically connected. The LED controller controls the power source to provide electricity to the LED strings and controls the buck circuit to store energy during a first period. The LED controller controls the buck circuit to provide electricity to the LED strings during a second period. The disclosure further provides a liquid crystal display. The disclosure has the advantage of preventing the LED backlight driving circuit from being damaged easily.
    Type: Application
    Filed: January 16, 2017
    Publication date: January 17, 2019
    Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Wendong LI
  • Patent number: 10178728
    Abstract: Provided is a direct current negative dimming circuit, comprising a first electrical switch, a second electrical switch and first to third resistors, a control end of the first electrical switch is connected to a dimming signal output end of a main chip to receive the first dimming signal, and a first end of the first electrical switch is connected to a voltage end to receive a first high voltage level signal, and a second end is connected to a control end of the second electrical switch, and a first end of the second electrical switch is connected to a dimming signal receiving end of a backlight module to output the second dimming signal, and a second end receives a second high voltage level signal, and a voltage level of the first dimming signal is opposite to a voltage level of the second dimming signal.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: January 8, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Wendong Li
  • Publication number: 20180376549
    Abstract: A light emitting diode (LED) backlight driver includes a power supply, an LED string having LEDs, a protection circuit, and a driver chip. A positive terminal of the LED string is electrically connected to the power supply. One terminal of the protection circuit is electrically connected to a negative terminal of the LED string. A first pin of the driver chip is electrically connected to the other terminal of the protection circuit. When the LED string works normally, the protection circuit is conducted. Once two terminals of the LED in the LED string are short-circuited, the protection circuit is automatically disconnected to protect the driver chip. An LCD using the LED backlight driver is provided. By using the present disclosure, pin damage of a driver chip does not occur.
    Type: Application
    Filed: January 16, 2017
    Publication date: December 27, 2018
    Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Wendong LI
  • Publication number: 20180374430
    Abstract: Provided is a backlight driving circuit, comprising voltage conversion circuit, PMW controller, zener diode, first electrical switch, optocoupler unit, boost switch and light source drive assembly. The PMW controller controls an output of the voltage conversion circuit. The light source drive assembly is connected to the boost switch and a light source to control on and off of the boost switch. A cathode of the zener diode is connected to the optocoupler unit, and an anode of the zener diode is connected to a control end of the first electric switch, and a first end of the first electrical switch is connected to the PWM controller, and a second end of the first electrical switch is grounded, and as the boost switch is short, a current outputted by the voltage conversion circuit increases, and the optocoupler unit breaks the zener diode down.
    Type: Application
    Filed: March 29, 2017
    Publication date: December 27, 2018
    Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Wendong LI