112results about How to "Easy to adjust light" patented technology

The invention discloses an intelligent regulation and control polychromatic light LED plant growth lamp system and a regulation and control method thereof, and relates to the technical field of lighting. The intelligent regulation and control polychromatic light LED plant growth lamp system comprises an upper computer, a PWM controller, a wireless transmitter, a wireless transceiver, a photosensitive sensor, a PWM dimming driver, an LED three-color lamp tube and a voltage stabilization direct-current power source; the PWM dimming driver is connected with the voltage stabilization direct-current power source, the LED three-color lamp tube is connected with the PWM dimming driver which is connected with the PWM controller, and the PWM controller is controlled by the wireless transmission upper computer; the LED three-color lamp tube comprises an aluminum alloy shell, an aluminum base lamp panel and a transparent lampshade, a radiating stricture is arranged on the aluminum alloy shell, and the aluminum base lamp panel is arranged between the aluminum alloy shell and the transparent lampshade; and the aluminum base lamp panel is provided with a plurality of LED lamp beads which comprise red-light LED lamp beads, blue-light LED lamp beads and blue-violet light LED lamp beads. According to the design, real-time regulation and control and remote and automatic control are easy to achieve, adjusting is convenient, rapid and accurate, dimming of polychromatic light is achieved, the radiating effect is good, and multiple requirements for plant light supplementing are met.

The invention discloses an LED driver, a control circuit and an LED driving method. The LED driver comprises a rectifier, an input capacitor, a power level, an inductor, an error amplifier, a setting comparer, a first timer, a logical AND circuit, a reset comparer, a second timer, a logical OR circuit, an RS trigger and a driving circuit. The LED driver can provide enough latching currents for a triac dimmer without a large RC circuit, the system size is reduced, and dimming is optimized.

By diverting a small amount of current from a string of LED(s) powered by a LED driver at low current levels in a process of dimming the LED string, performance of the LED string light emission is improved.

The invention provides a dual-frequency lighting mixed pulse width modulation dimming electronic ballast, relating to an electronic ballast. The invention provides a dual-frequency lighting mixed pulse width modulation dimming electronic ballast which can ensure the lightness of the lamp to be in 100% to 30% with reliable light modulation, leads to no flashing lamp phenomenon, is convenient for being applied in single-line illumination control circuits and can be widely applied to existing energy-saving lamps and ballasts. The invention is provides with a rectification circuit, a zero cross detection circuit, a system control circuit, a dual-frequency point power output circuit and a lamp driving circuit. The input terminal of the rectification circuit is externally connected with a power supply; the input terminal of the zero cross detection circuit is connected with the output terminal of the rectification circuit; the input terminal of the system control circuit is connected with the output terminal of the zero cross detection circuit; the power supply input terminal of the dual-frequency point power output circuit is connected with the output terminal of the rectification circuit; the control input terminal of the dual-frequency point power output circuit is connected with the system control circuit; the input terminal of the lamp driving circuit is connected with the output terminal of the dual-frequency point power output circuit; the output terminal of the lamp driving circuit is externally connected with loads.

A lighting device comprises a light source defining a central axis and comprising at least two mutually independently operable lighting elements. The lighting device further comprises a rotatable deflective member rotatably mounted about said axis, and a fixed deflective member fixedly mounted on said axis and comprising at least two mutually differently deflective portions which each are associated with a respective lighting element. The lighting device of the invention enables various operation modes, like light beam rotation can rotate, jumping of the light beam from one location to another by a sequence of switching on and off one or more of the at least two lighting elements, or in that it can be dimmed or boosted, for example dimmable in steps by a sequence of one by one switching off the lighting elements.