Sectionalized dimming device of LED (light-emitting diode) lamp

Abstract

The invention discloses a sectionalized dimming device of an LED (light-emitting diode) lamp. The sectionalized dimming device is characterized by comprising an LED driver, a primary load and a secondary load, wherein the primary load comprises a primary LED light source, and is directly connected with a driving end of the LED driver; the secondary load comprises a secondary LED light source of which the two ends are connected into a constant current module, and the input end of the secondary load is connected into the driving end of the LED driver; and voltage of the primary load is within the range of the minimum working voltage and the maximum working voltage of the secondary load. Under the control of a dimmer, states of the dimming device comprises an original state, an original regulating state and a sectionalized regulating state, wherein when the dimming device is in the original state, the primary light source of the primary load is fully bright, and the dimmer is in a maximum dimming state; when the dimming device is in the original regulating state, the dimmer is regulated, the brightness of the primary LED light source begins to change along with the dimmer, and the secondary LED light source is in a constant current normally on state; and when the dimming device is in the sectionalized regulating state, the brightness of the primary LED light source is zero, and the brightness of the secondary LED light source begins to change along with the dimmer. By adopting the scheme, the same dimmer is separated into multiple regulating sections, and each section independently corresponds to one load, so that reuse of the same dimmer is realized, and the compatibility is high.

Description

technical field [0001] The invention relates to a dimming device in the field of semiconductor lighting, in particular to a device for realizing segmental dimming of multiple light sources in an LED lamp. Background technique [0002] Dimming technology has a relatively mature scheme in the field of lighting, one of which is to use a thyristor device to chop the AC waveform, change the effective current of the light source load, and realize the change of the luminous flux. From the early incandescent light sources to the recent compact fluorescent lamps, there are more mature solutions for dimming using silicon controlled rectifiers. At this stage, with the development of LED light sources, LED light sources have already realized the replacement of traditional light sources in quite a few fields. Lamps using LED light sources are also gradually adapting to the way of thyristor dimming, and have more mature solutions . [0003] At present, LED lamps that use the thyristor d...

AI Technical Summary

Problems solved by technology

[0004] The scheme of the present invention aims at the problem of the single function of adjusting the luminous flux of LED lamps in the existing SCR mode, and proposes a solution to make the LED lamps have rich functions in the SCR adjustment mode;

[0005] The scheme of the present invention aims at the existing thyristor mode, which brings about additional adjustment line cost problem in the separation and adjustment of different loads in LED lamps, and proposes a solution, so that LED lamps can not be adjusted in more complex dimming modes. Need to add additional dimmer cost

Images