Self Electronics Co., Ltd.

Qiming Wang

Guanghua Wu

Jianguo Dong

Jianfeng Yu

The invention relates to a constant voltage dimming power supply for lighting device, which is used for adjusting output voltage regulated by dimmer to realize constant voltage PWM output, including a rectifying circuit performing rectifier filtering to output voltage regulated by dimmer; a constant voltage circuit electrically connected to output end of the rectifying circuit; a constant current load circuit electrically connected to output end of the rectifying circuit; a frequency conversion and protection sampling circuit electrically connected to output end of the constant current load circuit and constant voltage; and a switching circuit for controlling lighting load illumination; the frequency conversion and protection sampling circuit converts an output signal of the constant current load circuit into a duty cycle signal suitable for controlling the switching circuit and detects the output abnormality of the constant voltage circuit in real time, and the switching circuit is controlled to be turned on and off accordingly. Compared with the prior art, the constant voltage dimming power supply provided by the invention can provide a stable current and voltage and can well protect the lighting load.

Constant voltage dimming power supply and dimming system for lighting device

An LED lamp with constant current dimming drive circuit based on PWM input includes a PWM variable power supply input end, a PWM matching circuit, a voltage rectifying circuit, a DC-DC constant current output circuit and an LED lamp, and the voltage signal of the PWM variable power supply input end is provided by the PWM voltage output power supply, and the PWM variable power supply input end is respectively connected with the PWM matching circuit and the voltage rectifying circuit, and the PWM matching circuit is connected with the enable end of the DC-DC constant current output circuit, and the voltage rectifying circuit is connected to the power supply end of the DC-DC constant current output circuit, and the voltage of the voltage rectifying circuit changes according to the duty ratio of the voltage of the PWM variable power supply input end, and the voltage of the PWM variable power supply input end passes through the voltage dividing resistor of PWM matching circuit and output PWM control signal, and PWM control signal realizes non-stroboscopic adjustment LED lamp through the DC-DC constant current output circuit.

LED lamp with constant current dimming drive circuit based on PWM input

A plug-in multifunctional LED power system includes a power supply module, at least one output terminal, a switch module, a trigger conversion module, a compatible circuit module, and a replaceable control chip module. The trigger conversion module includes a first, second and third resistors connected in series from a high level output terminal to a ground. The switch module includes an N-type MOS transistor. The compatible circuit module is used for controlling on-off of the switching module by different control chip modules. The control chip module processes the input signal of the signal access unit and outputs a control signal for controlling the on/off of the switching unit so as to control the operating state of a LED lamp. The plug-in multi-functional LED power supply system can solve the increase of the production costs and the inconvenience for user installation caused by more existing power supply types and different models.

Plug-in multifunctional LED power system

An angle adjustment mechanism for LED bar lighting includes a lamp body, two end covers arranged two ends of the lamp body along an axial direction thereof, two lamp frames respectively mounted on the two threading pipes, two wheel gears respectively fixed on the two lamp frames, two outer end caps fixed and covered on the two end covers, respectively, and at least two stopping plates respectively received in the two lamp frames. Each of the two end covers includes a threading pipe extending along the axial direction of the lamp body. Each of the two wheel gears includes a plurality of gear teeth taken along a radial direction thereof and rotating around the threading pipe. Each of the stopping plates provides at least one stopping tooth which is coupling to the gear teeth.

Growing community of inventors

Zhejiang, China

Qiming Wang