Current Lighting Solutions, LLC

Ge Lighting Solutions LLC

Sigenergy Technology Co., Ltd.

Longyu Chen

Hongbin Wei

Qian Ni

Bruce Richard Roberts

Timothy Alan Taubert

Taylor Apolonius Barto

Yonghui Deng

Aling Li

Wenqiang Gao

Haomin Xu

Provided are a method for controlling a cycloconverter circuit, a cycloconverter circuit, and an isolated converter. The cycloconverter circuit is configured to perform alternating current to alternating current conversion and includes a plurality of switch elements connected in a plurality of current paths. The plurality of switch elements are divided into a plurality of groups of switch elements. Each group of switch elements includes at least one switch element disposed in each current path. The method includes: when the cycloconverter circuit is in a zero-crossing detection stage, controlling a first group of switch elements to be turned on complementarily and a second group of switch elements to switch between an on state and an off state. During a dead time between drive signals for the first group of switch elements, a first target switch element in the second group of switch elements is turned on.

Method for controlling cycloconverter circuit, cycloconverter circuit, and isolated converter

Embodiments are generally directed to an emergency driver () and an intelligent module () for the emergency driver (). An embodiment of the emergency driver () may include a digital communication interface (), a DC power supply () and a controller (). The digital communication interface () may be configured to receive an input signal () via a control bus (). The DC power supply () may be configured to provide a DC output () to the control bus (). The controller () may be coupled to the digital communication interface () and the DC power supply () and may be configured to control the emergency driver () to operate in a first operation mode. The input signal () received at the digital communication interface () may be a digital input signal when the emergency driver is operating in a first operation mode.

Emergency driver and intelligent module for the emergency driver

A driver comprises a controller coupled with a LED, and an interface circuit configured to be coupled between the controller and an external device. The interface circuit comprises an interface port configured to be coupled to the external device, an analog interface module, a digital interface module and a power supply module. The analog interface module is coupled between the interface port and the controller and configured to transmit an analog signal therebetween the external device and the controller in a first mode. The digital interface module is coupled between the interface port and the controller and configured to transmit a digital signal between the external device and the controller in a second mode and a third mode. The power supply module is coupled to the interface port and configured to provide energy to the external device in the first mode and the third mode.

LED driver, LED system and signal transmitting method for LED

A power converter comprising a first capacitor, a flyback conversion module, a soft-start module, and a feedback control module. The flyback conversion module is coupled with the first capacitor and configured to receive a first control voltage across the first capacitor. The soft-start module is coupled with the first capacitor and is configured to charge the first capacitor during a startup stage, to increase the first control voltage to an expected voltage value at the end of the startup stage. The feedback control module is coupled with the flyback conversion module and is configured to control the flyback conversion module to output a substantially constant voltage or current after the startup stage. Wherein the expected voltage value is a value of the first control voltage when the flyback conversion module outputs a substantially constant voltage or current after the startup stage.

Power converter, power conversion method and lighting apparatus

A driver comprises a front-end stage, a back-end stage, and an intermediate controller. The front-end stage comprises a front-end main circuit and a front-end controller, and is configured to rectify an AC input voltage from an external power supply and output a DC bus voltage through output terminals. The back-end stage comprises a buck circuit, and configured to receive the bus voltage from the front-end stage and output a desired DC drive voltage to a load according to an operating voltage of the load. The intermediate controller is configured to obtain a difference voltage signal indicative of an electric potential difference between the bus voltage and the drive voltage, and provide a feedback signal generated based on the difference voltage signal to the front-end controller. The front-end controller controls the front-end main circuit based on the feedback signal to change the bus voltage with change of the drive voltage.

Driver and LED lamp comprising driver

The present disclosure discloses a light-emitting diode (LED) driver comprising a controller and a main circuit. The controller is configured to receive a dimming signal for dimming an LED load and use a current hysteresis control to generate a control signal, wherein a hysteresis width of the current hysteresis control varies with the dimming signal. The main circuit comprises a front-end stage configured to receive an AC input voltage and output a DC bus voltage, and a back-end stage configured to receive the bus voltage and responsive to the control signal, output a desired drive current through output terminals to the LED load so as to produce a target illumination intensity. The present disclosure widens the dimming depth of analog dimming in the LED dimming technology, achieves deep dimming and satisfies good dimming linearity in the entire dimming range.

LED driver and LED lamp using the same

Aspects of the present disclosure include a dimming device comprising a dimming signal interface module which includes an optical coupling module and an analog-digital converter module having its input terminal connected to the input terminal of the dimming signal interface module and its output terminal selectively connected to the optical coupling module. The dimming signal interface module may receive digital signals and analog signals. When the analog signals are received by the input terminal of the dimming signal interface module, the analog-digital converter module may convert the analog signals to square-wave signals and output the square-wave signals to the optical coupling module. When digital signals are received by the input terminal of the dimming signal interface module, the output terminal of the analog-digital converter module may be disconnected from the optical coupling module. The dimming device may be able to receive digital and analog control signals to be used for dimming.

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Shanghai, China

Longyu Chen