Two-wire system light-adjustable LED controller

Abstract

The invention discloses a two-wire tunable optical LED controller which comprises an electronic fictitious load, a light-adjusting and sampling circuit, a power supply and light-adjusting signal drive circuit, a PWM output circuit, a rectification circuit in a tunable optical LED lamp body, a light-adjusting signal and power supply separating circuit, an LED drive constant current source and an LED light source. A PWM signal modulates a power supply through the power supply and light-adjusting signal drive circuit and combines an LED power supply source and a light-adjusting signal into the power supply containing light-adjusting information to be sent to the tunable optical LED lamp body. The rectification circuit in the lamp body processes the power supply containing the light-adjusting information for pole changing. The changed power supply containing the light-adjusting information is processed so as to separate the light-adjusting signal from the power supply by the light-adjusting signal and power supply separating circuit, the separated light-adjusting signal is sent to a light adjusting end of the LED drive constant current source, and the separated power supply is sent to the LED drive constant current source to supply power. The two-wire tunable optical LED controller has very wide application prospect with respect to the two-wire LED light adjustment.

Description

Technical field [0001] The present invention relates to a dimming controller, more specifically, to a two-wire dimmable LED controller. Background technique [0002] At present, the dimming object of the light is generally an incandescent lamp or a halogen lamp, and their dimming method is to add a silicon controlled rectifier dimmer to the front end to dim it, which is a direct high-voltage two-wire system. Dimming is a more traditional method of dimming. With the emergence of low-power and energy-saving LEDs, LEDs have low-voltage energy-saving, good spectrum, pure color, high luminous efficiency, no ultraviolet radiation, etc. These many advantages of LEDs make them actively promoted. Now they have become popular in commercial lighting. Begin to gradually replace ordinary light sources. Since LED lighting is still an excessive lighting product, its driving mode is driven by constant current, which makes the dimming of LED cannot be dimmed by adjusting the voltage at bot...

AI Technical Summary

Problems solved by technology

Since LED lighting is still an excessive lighting product, its driving mode is driven by constant current, which makes the dimming of LED cannot be dimmed by adjusting the voltage at both ends of it, so the control of the circuit still needs to be solved. Not fully compatible with current wiring

At present, the dimming of LEDs is dimmed by PWM pulses with a relatively high frequency, so the light source of LED lighting has not only two power lines, but also a dimming port, while traditional incandescent bulbs and halogen lamps are in the other. A thyristor dimmer is connected in series in front of the power line, and the dimming is performed by adjusting the effective voltage value of the load through front-cut phase or back-cut phase dimming, so the traditional dimming circuit is not compatible with the LED dimming method And direct installation; because LED lighting is a low-voltage power supply, in addition to the constant current source in the LED lamp body, there is also an AC-DC conversion power supply outside. If it is made into an LED dimming system with dimming function, it must be drawn from the LED lamp body. Two power lines and one dimming line, this operation is very inconvenient, there is no such lighting body on the market, such as MR16 is a light body with only two connectors, and it has dimming function, LED can do Just like MR16, there are only two terminals and the function of dimming will become the only way for the development of LED lighting

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