Patents by Inventor RONGTU LIU

RONGTU 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).

  • Publication number: 20210378071
    Abstract: A dimmable light tube with anti-electric shock protection function includes two conductive pin assemblies, a bridge rectifier, an anti-electric shock detection control circuit, and a buck-boost constant current module. The bridge rectifier is connected to the conductive pin assemblies. The anti-electric shock detection control circuit is connected to the bridge rectifier, and the anti-electric shock detection control circuit has an output end and a resistor. The input end of the buck-boost constant current module is connected to the output end and the driving module is connected to the resistor so as to perform the leakage control function. The current conduction angle of the current generated by the transmission of the anti-electric shock detection control circuit can be changed by the buck-boost constant current module, so that the dimming function can be provided.
    Type: Application
    Filed: August 20, 2020
    Publication date: December 2, 2021
    Inventors: FUXING LU, RONGTU LIU
  • Patent number: 11122671
    Abstract: A light tube with anti-electric shock protection function and capable of being supplied with electricity by electrical ballast and alternate-current power supply in working frequency includes two conductive pin assemblies, a bridge rectifier, an anti-electric shock detection control circuit, a direct-current filtering circuit, a bleeder resistor, a buck-boost constant current module, and a rectifier. The direct-current filtering circuit is connected to the anti-electric shock detection control circuit and the bleeder resistor. The direct-current filtering circuit performs a smoothing procedure to a direct-current pulse voltage signal which is rectified by the bridge rectifier, the direct-current filtering circuit generates a false voltage to the anti-electric shock detection control circuit, and the bleeder resistor reduces the false voltage. The rectifier is connected to the bridge rectifier to receive a rectifier circuit, and the electrical ballast inputs the voltage signal to the bridge rectifier.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: September 14, 2021
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Publication number: 20210254819
    Abstract: A protection system for a lamp is provided. One or more control circuit boards and one or more thermal devices are disposed in the lamp. The control circuit board has an electrical circuit. The thermal device is disposed on the control circuit board and connected to the electrical circuit. The thermal device is attached to one or more thermal fuses with a binding member. Accordingly, the safety of the driving power supply can be increased. Moreover, the thermal fuse not only provides protection for the inputs of the driving power supply, but also provides protection for other main or branch circuits.
    Type: Application
    Filed: May 25, 2020
    Publication date: August 19, 2021
    Inventors: FUXING LU, RONGTU LIU
  • Patent number: 11083065
    Abstract: A driving circuit device for anti-leakage LED tube with dual-end input is provided. Two ends of the LED tube have two conductive pin assemblies electrically connected to mains supply. Each of the conductive pin assemblies includes two pins. One of the conductive pin assemblies is connected to an input bridge rectifier and has an output end. A constant current module has an input end. The input end of the constant current module is connected to the output end of the anti-leakage detection module. The anti-leakage detection module is provided for detecting a current state. A current is controlled to be outputted from the output end and to be inputted into the input end according to the current state, and the constant current module is changed to output a loop current not exceeding a rated standard.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: August 3, 2021
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Publication number: 20210204377
    Abstract: A driving circuit device for anti-leakage LED tube with dual-end input is provided. Two ends of the LED tube have two conductive pin assemblies electrically connected to mains supply. Each of the conductive pin assemblies includes two pins. One of the conductive pin assemblies is connected to an input bridge rectifier and has an output end. A constant current module has an input end. The input end of the constant current module is connected to the output end of the anti-leakage detection module. The anti-leakage detection module is provided for detecting a current state. A current is controlled to be outputted from the output end and to be inputted into the input end according to the current state, and the constant current module is changed to output a loop current not exceeding a rated standard.
    Type: Application
    Filed: April 21, 2020
    Publication date: July 1, 2021
    Inventors: FUXING LU, RONGTU LIU
  • Publication number: 20210199253
    Abstract: An LED tube with built-in driving power module is provided. Each of two ends of the LED tube has a conductive component electrically connected to mains supply. The conductive component at least includes a conductive pin assembly and a sleeve member for disposing the conductive pin assembly. The driving power module is formed by circuit boards, and the circuit boards are disposed in the sleeve member. Each of the circuit boards at least includes a functional operation unit, and the circuit boards are in series connection via one or more electrical connection members. The capacity space at both ends of the sleeve of LED tube is used to concentrate each circuit board in order to make full use of the capacity space. Meanwhile, the larger sleeve mold structure is avoided to cause the change of product appearance and increase the project development cost.
    Type: Application
    Filed: April 24, 2020
    Publication date: July 1, 2021
    Inventors: FUXING LU, RONGTU LIU
  • Patent number: 11035560
    Abstract: An optical communication lamp device is provided and the lamp device includes an emitting-end driving controller, a power unit, and a light emitting element. The light emitting element is electrically connected to the emitting-end driving controller and the power unit. The emitting-end driving controller receives an electrical signal to control the light emitting element.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: June 15, 2021
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 11032890
    Abstract: The invention is a dimmable lamp switch control device, including: a rectifier bridge module is connected to the conductive pin sets and can enter at least one voltage signal. A filter circuit module has a circuit guard unit connects to a backflow prevention steady voltage filter circuit module, which can play a role in surge voltage absorption and prevent damage from excessive surge voltage connected to the output of a backflow prevention steady voltage filter circuit module. A PWM dimming control unit of a buck-boost constant current module is connected to the dimming signal identification and control circuit module for dimming control. An anti-electricity shock detection control circuit module based on the output signal of the rectifier bridge module to reduce the PWM signal of the buck-boost constant current module to avoid a greater electric shock currents.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: June 8, 2021
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 11028974
    Abstract: An LED tube with built-in driving power module is provided. Each of two ends of the LED tube has a conductive component electrically connected to mains supply. The conductive component at least includes a conductive pin assembly and a sleeve member for disposing the conductive pin assembly. The driving power module is formed by circuit boards, and the circuit boards are disposed in the sleeve member. Each of the circuit boards at least includes a functional operation unit, and the circuit boards are in series connection via one or more electrical connection members. The capacity space at both ends of the sleeve of LED tube is used to concentrate each circuit board in order to make full use of the capacity space. Meanwhile, the larger sleeve mold structure is avoided to cause the change of product appearance and increase the project development cost.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: June 8, 2021
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 10959301
    Abstract: A polarity correction circuit for dimmer includes a control circuit, an adjustment circuit, and a detection circuit. The adjustment circuit is connected to the control circuit, a working voltage input end, and a dimmer, and the adjustment circuit includes several switches. The adjustment circuit receives a dimming signal of the dimmer. The detection circuit is connected to the dimmer and the control circuit, the detection circuit detects the dimming signal to generate a reference voltage, and the detection circuit transmits the reference voltage to the control circuit. The control circuit maintains the switch states of the switches of the adjustment circuit unchanged or adjust the switch states of the switches of the adjustment circuit according to the reference voltage.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: March 23, 2021
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 10895352
    Abstract: An LED tube is provided. Two ends of the LED tube respectively have two conductive pin assemblies electrically connected to the mains supply and a detecting control component in the LED tube and electrically connected to an electrical ballast. A voltage conversion device perform an AC-DC voltage conversion. A recognizable electrical ballast detects a voltage state of the voltage conversion device to recognize a voltage impedance complying with the electrical ballast or the mains supply, thereby generating a feedback signal. A signal receiving module of the voltage impedance signal-recognizing device obtains the feedback signal, and the signal executing module of the voltage impedance signal-recognizing device generates a DC starting voltage complying with the electrical ballast or the mains supply. The DC starting voltage is filtered by the DC filtering module, and an outputted current magnitude of the DC starting voltage is adjusted by the buck-boost constant current module.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: January 19, 2021
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 10645784
    Abstract: The invention discloses an electric leakage protection electronic rectifier and a lamp with an electric leakage protection electronic rectifier. The electric leakage protection electronic rectifier including a leakage detecting module and a driving module. The driving module has a current-limiting control unit. The current-limiting control unit is electrically connected between the leakage detecting module and a lamp's light-emitting module. When used, the leakage detecting module detects whether power supply is leaked, and the current-limiting control unit limits the output current to avoid the current output exceeding the tolerable range of the lamp. Such that the invention prolongs the service life of lamps and prevents a current leakage from the lamp.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: May 5, 2020
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 10616983
    Abstract: The invention provides a dimmable lamp, which is used in combination with a dimmable device outputting a dimming signal with polarity. The dimmable lamp comprises: a light emitting device for emitting light; a dimming drive module for controlling the work of the light emitting device being electrically connected with the light emitting device; a polarity conversion unit for selectively converting the polarity of the dimming signal being electrically connected to the dimmer; a signal processing unit used for processing the dimming signal being connected with the polarity conversion unit and the dimming drive module respectively to control the dimming drive module according to the dimming signal. The dimming function of the dimmable lamp can be normally realized when the dimming signal are connected at any polarity.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: April 7, 2020
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 10381866
    Abstract: A light emitting diode (LED) emergency light with transportation mode includes an alternating current (AC)-direct current (DC) LED driving circuit, a light source, and an emergency module, wherein the emergency module includes a battery, the AC-DC LED driving circuit is electrically connected to a terminal of the light source, and the emergency module is electrically connected to another terminal of the light source. After the emergency module generates a transportation mode signal, the LED emergency light enters the transportation mode, and a power supply circuit within the emergency module utilizing the battery to drive the light source is turned off according to the transportation mode signal. Therefore, after the LED emergency light enters the transportation mode, current consumption of the LED emergency light is decreased significantly, so the present invention greatly extends storage time of the LED emergency light during a transportation and warehouse process of the LED emergency light.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: August 13, 2019
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Patent number: 10349474
    Abstract: An LED lamp tube capable of rectifying and stabilizing voltages includes an LED component. Two ends of the LED lamp tube respectively include two conductive pin assemblies, a polarity conversion module, a suppressor, and a voltage buck-booster module. The polarity conversion module includes two voltage conversion devices connected to the conductive pin assemblies. A set of capacitors is electrically connected between each of the voltage conversion devices to operate a circuit in an electronic rectifier to compensate and stabilize an input voltage.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: July 9, 2019
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Minghui Qiu, Rongtu Liu
  • Patent number: 10264649
    Abstract: A control set for adjusting the light source is provided. The control set includes a control module. The control module includes a control chip and a storage. The control chip controls the brightness of the lamp. The storage connected with a timing unit and stores a fine tuning signal. The fine tuning signal stored in the storage is generated and output to the adjust signal by turning off and turning on the adjustable power switch, the timing unit sets a preset time period in which the fine tuning signal maintains effective, and the fine tuning signal controls the lamp to have a brightness the same as the brightness when the lamp is turned off last time, or the brightness of the lamp is gradually increased to the preset brightness and then decreased.
    Type: Grant
    Filed: October 1, 2017
    Date of Patent: April 16, 2019
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu
  • Publication number: 20190014629
    Abstract: A multi-input LED lamp, which has two ends having two conductive pin modules, respectively. Each conductive pin module has two pins. The LED lamp includes a LED module, a conversion module and a voltage scaling module. The conversion module comprises two voltage conversion apparatuses. Each voltage conversion apparatus is connected to the conductive pin module. Two selective pins among the pins of the conductive pin modules are used for receiving an input power. The input power that passes through one of the voltage conversion apparatus, is processed with a current conversion by the voltage scaling module and transmitted to the LED module. Therefore, the multi-input LED lamp in accordance with present invention is adapted to multiple power supply manner.
    Type: Application
    Filed: October 17, 2017
    Publication date: January 10, 2019
    Inventors: FUXING LU, RONGTU LIU
  • Publication number: 20190014639
    Abstract: A LED tube with the voltage boosting circuit, wherein the LED tube includes a LED base, a circuit board configured on the LED base, and a lampshade configured on the LED base to cover the circuit board, at least 50 LED lamp beads connected in series are configured on the circuit board, the LED lamp beads is electronically connected with the circuit board, the circuit board includes a driving module, the driving module has a high voltage input and low current output to excite the LED lamp beads, and the driving module make a current of the LED lamp beads consistent via a voltage boosting circuit. The efficient of LED lamp beads is improved. The ripple is avoided, and the stroboflash is reduced.
    Type: Application
    Filed: October 17, 2017
    Publication date: January 10, 2019
    Inventors: FUXING LU, RONGTU LIU, RUICHA LAI
  • Publication number: 20190014630
    Abstract: An LED lamp tube capable of rectifying and stabilizing voltages includes an LED component. Two ends of the LED lamp tube respectively include two conductive pin assemblies, a polarity conversion module, a suppressor, and a voltage buck-booster module. The polarity conversion module includes two voltage conversion devices connected to the conductive pin assemblies. A set of capacitors is electrically connected between each of the voltage conversion devices to operate a circuit in an electronic rectifier to compensate and stabilize an input voltage.
    Type: Application
    Filed: December 13, 2017
    Publication date: January 10, 2019
    Inventors: FUXING LU, MINGHUI QIU, RONGTU LIU
  • Patent number: 10161571
    Abstract: A LED tube with a safety device is provided. The LED tube is connected with an external power supply, comprises: two conductive needle groups, each of the conductive needle groups includes two needles; at least a LED light-emitting component configured to be electrically connected with the needles; and a plurality of fuses configured at the conductive needle groups, respectively.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: December 25, 2018
    Assignee: Xiamen PVTECH Co., Ltd.
    Inventors: Fuxing Lu, Rongtu Liu